Edit the formatting of the CLI case reporter

* Added a resolver tied to a specific block

* Increase the number of private keys

* Increase kitchensink wait time to 60 seconds

* Add a case ignore flag

.github/workflows/test.yml

@@ -0,0 +1,163 @@
+name: Test workflow
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+    types: [opened, synchronize]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  cache-polkadot:
+    name: Build and cache Polkadot binaries on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, macos-14]
+
+    steps:
+      - name: Checkout repo and submodules
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install dependencies (Linux)
+        if: matrix.os == 'ubuntu-24.04'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y protobuf-compiler clang libclang-dev
+          rustup target add wasm32-unknown-unknown
+          rustup component add rust-src
+
+      - name: Install dependencies (macOS)
+        if: matrix.os == 'macos-14'
+        run: |
+          brew install protobuf
+          rustup target add wasm32-unknown-unknown
+          rustup component add rust-src
+
+      - name: Cache binaries
+        id: cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/bin/substrate-node
+            ~/.cargo/bin/eth-rpc
+          key: polkadot-binaries-${{ matrix.os }}-${{ hashFiles('polkadot-sdk/.git') }}
+
+      - name: Build substrate-node
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: |
+          cd polkadot-sdk
+          cargo install --locked --force --profile=production --path substrate/bin/node/cli --bin substrate-node --features cli
+
+      - name: Build eth-rpc
+        if: steps.cache.outputs.cache-hit != 'true'
+        run: |
+          cd polkadot-sdk
+          cargo install --path substrate/frame/revive/rpc --bin eth-rpc
+
+  ci:
+    name: CI on ${{ matrix.os }}
+    needs: cache-polkadot
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, macos-14]
+
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v4
+
+      - name: Restore binaries from cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/bin/substrate-node
+            ~/.cargo/bin/eth-rpc
+          key: polkadot-binaries-${{ matrix.os }}-${{ hashFiles('polkadot-sdk/.git') }}
+
+      - name: Setup Rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          rustflags: ""
+
+      - name: Add wasm32 target
+        run: |
+          rustup target add wasm32-unknown-unknown
+          rustup component add rust-src
+
+      - name: Install Geth on Ubuntu
+        if: matrix.os == 'ubuntu-24.04'
+        run: |
+          sudo add-apt-repository -y ppa:ethereum/ethereum
+          sudo apt-get update
+          sudo apt-get install -y protobuf-compiler
+
+          sudo apt-get install -y solc
+
+          # We were facing some issues in CI with the 1.16.* versions of geth, and specifically on
+          # Ubuntu. Eventually, we found out that the last version of geth that worked in our CI was
+          # version 1.15.11. Thus, this is the version that we want to use in CI. The PPA sadly does
+          # not have historic versions of Geth and therefore we need to resort to downloading pre
+          # built binaries for Geth and the surrounding tools which is what the following parts of 
+          # the script do.
+
+          sudo apt-get install -y wget ca-certificates tar
+          ARCH=$(uname -m)
+          if [ "$ARCH" = "x86_64" ]; then
+            URL="https://gethstore.blob.core.windows.net/builds/geth-alltools-linux-amd64-1.15.11-36b2371c.tar.gz"
+          elif [ "$ARCH" = "aarch64" ]; then
+            URL="https://gethstore.blob.core.windows.net/builds/geth-alltools-linux-arm64-1.15.11-36b2371c.tar.gz"
+          else
+            echo "Unsupported architecture: $ARCH"
+            exit 1
+          fi
+          wget -qO- "$URL" | sudo tar xz -C /usr/local/bin --strip-components=1
+          geth --version
+
+          curl -sL https://github.com/paritytech/revive/releases/download/v0.3.0/resolc-x86_64-unknown-linux-musl -o resolc
+          chmod +x resolc
+          sudo mv resolc /usr/local/bin
+
+      - name: Install Geth on macOS
+        if: matrix.os == 'macos-14'
+        run: |
+          brew tap ethereum/ethereum
+          brew install ethereum protobuf
+
+          brew install solidity
+
+          curl -sL https://github.com/paritytech/revive/releases/download/v0.3.0/resolc-universal-apple-darwin -o resolc
+          chmod +x resolc
+          sudo mv resolc /usr/local/bin
+
+      - name: Machete
+        uses: bnjbvr/cargo-machete@v0.7.1
+
+      - name: Format
+        run: make format
+
+      - name: Clippy
+        run: make clippy
+
+      - name: Check substrate-node version
+        run: substrate-node --version
+
+      - name: Check eth-rpc version
+        run: eth-rpc --version
+
+      - name: Check resolc version
+        run: resolc --version
+
+      - name: Test cargo workspace
+        run: make test

.gitignore

@@ -0,0 +1,9 @@
+/target
+.vscode/
+.DS_Store
+node_modules
+/*.json
+
+# We do not want to commit any log files that we produce from running the code locally so this is 
+# added to the .gitignore file.
+*.log

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "polkadot-sdk"]
+	path = polkadot-sdk
+	url = https://github.com/paritytech/polkadot-sdk.git

Cargo.toml

@@ -0,0 +1,85 @@
+[workspace]
+resolver = "2"
+members = ["crates/*"]
+
+[workspace.package]
+version = "0.1.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+license = "MIT/Apache-2.0"
+edition = "2024"
+repository = "https://github.com/paritytech/revive-differential-testing.git"
+rust-version = "1.85.0"
+
+[workspace.dependencies]
+revive-dt-common = { version = "0.1.0", path = "crates/common" }
+revive-dt-compiler = { version = "0.1.0", path = "crates/compiler" }
+revive-dt-config = { version = "0.1.0", path = "crates/config" }
+revive-dt-core = { version = "0.1.0", path = "crates/core" }
+revive-dt-format = { version = "0.1.0", path = "crates/format" }
+revive-dt-node = { version = "0.1.0", path = "crates/node" }
+revive-dt-node-interaction = { version = "0.1.0", path = "crates/node-interaction" }
+revive-dt-node-pool = { version = "0.1.0", path = "crates/node-pool" }
+revive-dt-report = { version = "0.1.0", path = "crates/report" }
+revive-dt-solc-binaries = { version = "0.1.0", path = "crates/solc-binaries" }
+
+alloy-primitives = "1.2.1"
+alloy-sol-types = "1.2.1"
+anyhow = "1.0"
+clap = { version = "4", features = ["derive"] }
+foundry-compilers-artifacts = { version = "0.18.0" }
+futures = { version = "0.3.31" }
+hex = "0.4.3"
+reqwest = { version = "0.12.15", features = ["json"] }
+once_cell = "1.21"
+semver = { version = "1.0", features = ["serde"] }
+serde = { version = "1.0", default-features = false, features = ["derive"] }
+serde_json = { version = "1.0", default-features = false, features = [
+    "arbitrary_precision",
+    "std",
+] }
+sha2 = { version = "0.10.9" }
+sp-core = "36.1.0"
+sp-runtime = "41.1.0"
+temp-dir = { version = "0.1.16" }
+tempfile = "3.3"
+tokio = { version = "1.47.0", default-features = false, features = [
+    "rt-multi-thread",
+    "process",
+    "rt",
+] }
+uuid = { version = "1.8", features = ["v4"] }
+tracing = "0.1.41"
+tracing-subscriber = { version = "0.3.19", default-features = false, features = [
+    "fmt",
+    "json",
+    "env-filter",
+] }
+indexmap = { version = "2.10.0", default-features = false }
+
+# revive compiler
+revive-solc-json-interface = { git = "https://github.com/paritytech/revive", rev = "3389865af7c3ff6f29a586d82157e8bc573c1a8e" }
+revive-common = { git = "https://github.com/paritytech/revive", rev = "3389865af7c3ff6f29a586d82157e8bc573c1a8e" }
+revive-differential = { git = "https://github.com/paritytech/revive", rev = "3389865af7c3ff6f29a586d82157e8bc573c1a8e" }
+
+[workspace.dependencies.alloy]
+version = "1.0.22"
+default-features = false
+features = [
+    "json-abi",
+    "providers",
+    "provider-ipc",
+    "provider-debug-api",
+    "reqwest",
+    "rpc-types",
+    "signer-local",
+    "std",
+    "network",
+    "serde",
+    "rpc-types-eth",
+    "genesis",
+]
+
+[profile.bench]
+inherits = "release"
+lto = true
+codegen-units = 1

Makefile

@@ -0,0 +1,15 @@
+.PHONY: format clippy test machete
+
+format:
+	cargo fmt --all -- --check
+
+clippy:
+	cargo clippy --all-features --workspace -- --deny warnings
+
+machete:
+	cargo install cargo-machete
+	cargo machete crates
+
+test: format clippy machete
+	cargo test --workspace -- --nocapture
+

README.md

@@ -1,2 +1,34 @@
 # revive-differential-tests
-revive differential testing framework
+
+The revive differential testing framework allows to define smart contract tests in a declarative manner in order to compile and execute them against different Ethereum-compatible blockchain implmentations. This is useful to:
+- Analyze observable differences in contract compilation and execution across different blockchain implementations, including contract storage, account balances, transaction output and emitted events on a per-transaction base.
+- Collect and compare benchmark metrics such as code size, gas usage or transaction throughput per seconds (TPS) of different blockchain implementations.
+- Ensure reproducible contract builds across multiple compiler implementations or multiple host platforms.
+- Implement end-to-end regression tests for Ethereum-compatible smart contract stacks.
+
+# Declarative test format
+
+For now, the format used to write tests is the [matter-labs era compiler format](https://github.com/matter-labs/era-compiler-tests?tab=readme-ov-file#matter-labs-simplecomplex-format). This allows us to re-use many tests from their corpora.
+
+# The `retester` utility
+
+The `retester` helper utilty is used to run the tests. To get an idea of what `retester` can do, please consults its command line help: 
+
+```
+cargo run -p revive-dt-core -- --help
+```
+
+For example, to run the [complex Solidity tests](https://github.com/matter-labs/era-compiler-tests/tree/main/solidity/complex), define a corpus structure as follows:
+
+```json
+{
+    "name": "ML Solidity Complex",
+    "path": "/path/to/era-compiler-tests/solidity/complex"
+}
+```
+
+Assuming this to be saved in a `ml-solidity-complex.json` file, the following command will try to compile and execute the tests found inside the corpus:
+
+```bash
+RUST_LOG=debug cargo r --release -p revive-dt-core  -- --corpus ml-solidity-complex.json 
+```

assets/test_metadata.json

@@ -0,0 +1,326 @@
+{
+    "modes": [
+        "Y >=0.8.9",
+        "E",
+        "I"
+    ],
+    "cases": [
+        {
+            "name": "first",
+            "inputs": [
+                {
+                    "instance": "WBTC_1",
+                    "method": "#deployer",
+                    "calldata": [
+                        "0x40",
+                        "0x80",
+                        "4",
+                        "0x5742544300000000000000000000000000000000000000000000000000000000",
+                        "14",
+                        "0x5772617070656420425443000000000000000000000000000000000000000000"
+                    ],
+                    "expected": [
+                        "WBTC_1.address"
+                    ]
+                },
+                {
+                    "instance": "WBTC_2",
+                    "method": "#deployer",
+                    "calldata": [
+                        "0x40",
+                        "0x80",
+                        "4",
+                        "0x5742544300000000000000000000000000000000000000000000000000000000",
+                        "14",
+                        "0x5772617070656420425443000000000000000000000000000000000000000000"
+                    ],
+                    "expected": [
+                        "WBTC_2.address"
+                    ]
+                },
+                {
+                    "instance": "Mooniswap",
+                    "method": "#deployer",
+                    "calldata": [
+                        "0x0000000000000000000000000000000000000000000000000000000000000060",
+                        "0x00000000000000000000000000000000000000000000000000000000000000c0",
+                        "0x0000000000000000000000000000000000000000000000000000000000000100",
+                        "0x0000000000000000000000000000000000000000000000000000000000000002",
+                        "WBTC_1.address",
+                        "WBTC_2.address",
+                        "4",
+                        "0x5742544300000000000000000000000000000000000000000000000000000000",
+                        "14",
+                        "0x5772617070656420425443000000000000000000000000000000000000000000"
+                    ],
+                    "expected": {
+                        "return_data": [
+                            "Mooniswap.address"
+                        ],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0x8be0079c531659141344cd1fd0a4f28419497f9722a3daafe3b4186f6b6457e0",
+                                    "0x0000000000000000000000000000000000000000000000000000000000000000",
+                                    "0xdeadbeef01000000000000000000000000000000"
+                                ],
+                                "values": []
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "WBTC_1",
+                    "method": "_mint",
+                    "calldata": [
+                        "0xdeadbeef00000000000000000000000000000042",
+                        "1000000000"
+                    ],
+                    "expected": {
+                        "return_data": [],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0x0000000000000000000000000000000000000000000000000000000000000000",
+                                    "0xdeadbeef00000000000000000000000000000042"
+                                ],
+                                "values": [
+                                    "1000000000"
+                                ]
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "WBTC_2",
+                    "method": "_mint",
+                    "calldata": [
+                        "0xdeadbeef00000000000000000000000000000042",
+                        "1000000000"
+                    ],
+                    "expected": {
+                        "return_data": [],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0x0000000000000000000000000000000000000000000000000000000000000000",
+                                    "0xdeadbeef00000000000000000000000000000042"
+                                ],
+                                "values": [
+                                    "1000000000"
+                                ]
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "WBTC_1",
+                    "caller": "0xdeadbeef00000000000000000000000000000042",
+                    "method": "approve",
+                    "calldata": [
+                        "Mooniswap.address",
+                        "500000000"
+                    ],
+                    "expected": {
+                        "return_data": [
+                            "0x0000000000000000000000000000000000000000000000000000000000000001"
+                        ],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "500000000"
+                                ]
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "WBTC_2",
+                    "caller": "0xdeadbeef00000000000000000000000000000042",
+                    "method": "approve",
+                    "calldata": [
+                        "Mooniswap.address",
+                        "500000000"
+                    ],
+                    "expected": {
+                        "return_data": [
+                            "0x0000000000000000000000000000000000000000000000000000000000000001"
+                        ],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "500000000"
+                                ]
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "Mooniswap",
+                    "caller": "0xdeadbeef00000000000000000000000000000042",
+                    "method": "deposit",
+                    "calldata": [
+                        "0x0000000000000000000000000000000000000000000000000000000000000040",
+                        "0x00000000000000000000000000000000000000000000000000000000000000a0",
+                        "0x0000000000000000000000000000000000000000000000000000000000000002",
+                        "10000000",
+                        "10000000",
+                        "0x0000000000000000000000000000000000000000000000000000000000000002",
+                        "1000000",
+                        "1000000"
+                    ],
+                    "expected": {
+                        "return_data": [
+                            "10000000"
+                        ],
+                        "events": [
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0x0000000000000000000000000000000000000000000000000000000000000000",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "1000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "10000000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "490000000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "10000000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
+                                    "0xdeadbeef00000000000000000000000000000042",
+                                    "Mooniswap.address"
+                                ],
+                                "values": [
+                                    "490000000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                                    "0x0000000000000000000000000000000000000000000000000000000000000000",
+                                    "0xdeadbeef00000000000000000000000000000042"
+                                ],
+                                "values": [
+                                    "10000000"
+                                ]
+                            },
+                            {
+                                "topics": [
+                                    "0x2da466a7b24304f47e87fa2e1e5a81b9831ce54fec19055ce277ca2f39ba42c4",
+                                    "0xdeadbeef00000000000000000000000000000042"
+                                ],
+                                "values": [
+                                    "10000000"
+                                ]
+                            }
+                        ],
+                        "exception": false
+                    }
+                },
+                {
+                    "instance": "Mooniswap",
+                    "caller": "0xdeadbeef00000000000000000000000000000042",
+                    "method": "swap",
+                    "calldata": [
+                        "WBTC_1.address",
+                        "WBTC_2.address",
+                        "5000",
+                        "5000",
+                        "0"
+                    ]
+                }
+            ],
+            "expected": {
+                "return_data": [
+                    "5000"
+                ],
+                "events": [
+                    {
+                        "topics": [
+                            "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
+                            "0xdeadbeef00000000000000000000000000000042",
+                            "Mooniswap.address"
+                        ],
+                        "values": [
+                            "5000"
+                        ]
+                    },
+                    {
+                        "topics": [
+                            "0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925",
+                            "0xdeadbeef00000000000000000000000000000042",
+                            "Mooniswap.address"
+                        ],
+                        "values": [
+                            "489995000"
+                        ]
+                    }
+                ],
+                "exception": false
+            }
+        }
+    ],
+    "contracts": {
+        "Mooniswap": "Mooniswap.sol:Mooniswap",
+        "WBTC_1": "ERC20/ERC20.sol:ERC20",
+        "WBTC_2": "ERC20/ERC20.sol:ERC20",
+        "VirtualBalance": "Mooniswap.sol:VirtualBalance",
+        "Math": "math/Math.sol:Math"
+    },
+    "libraries": {
+        "Mooniswap.sol": {
+            "VirtualBalance": "VirtualBalance"
+        },
+        "math/Math.sol": {
+            "Math": "Math"
+        }
+    },
+    "group": "Real life"
+}

crates/common/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "revive-dt-common"
+description = "A library containing common concepts that other crates in the workspace can rely on"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+anyhow = { workspace = true }
+semver = { workspace = true }
+tokio = { workspace = true, default-features = false, features = ["time"] }

crates/common/src/fs/clear_dir.rs

@@ -0,0 +1,22 @@
+use std::{
+    fs::{read_dir, remove_dir_all, remove_file},
+    path::Path,
+};
+
+use anyhow::Result;
+
+/// This method clears the passed directory of all of the files and directories contained within
+/// without deleting the directory.
+pub fn clear_directory(path: impl AsRef<Path>) -> Result<()> {
+    for entry in read_dir(path.as_ref())? {
+        let entry = entry?;
+        let entry_path = entry.path();
+
+        if entry_path.is_file() {
+            remove_file(entry_path)?
+        } else {
+            remove_dir_all(entry_path)?
+        }
+    }
+    Ok(())
+}

crates/common/src/fs/mod.rs

@@ -0,0 +1,3 @@
+mod clear_dir;
+
+pub use clear_dir::*;

crates/common/src/futures/mod.rs

@@ -0,0 +1,3 @@
+mod poll;
+
+pub use poll::*;

crates/common/src/futures/poll.rs

@@ -0,0 +1,69 @@
+use std::ops::ControlFlow;
+use std::time::Duration;
+
+use anyhow::{Result, anyhow};
+
+const EXPONENTIAL_BACKOFF_MAX_WAIT_DURATION: Duration = Duration::from_secs(60);
+
+/// A function that polls for a fallible future for some period of time and errors if it fails to
+/// get a result after polling.
+///
+/// Given a future that returns a [`Result<ControlFlow<O, ()>>`], this function calls the future
+/// repeatedly (with some wait period) until the future returns a [`ControlFlow::Break`] or until it
+/// returns an [`Err`] in which case the function stops polling and returns the error.
+///
+/// If the future keeps returning [`ControlFlow::Continue`] and fails to return a [`Break`] within
+/// the permitted polling duration then this function returns an [`Err`]
+///
+/// [`Break`]: ControlFlow::Break
+/// [`Continue`]: ControlFlow::Continue
+pub async fn poll<F, O>(
+    polling_duration: Duration,
+    polling_wait_behavior: PollingWaitBehavior,
+    mut future: impl FnMut() -> F,
+) -> Result<O>
+where
+    F: Future<Output = Result<ControlFlow<O, ()>>>,
+{
+    let mut retries = 0;
+    let mut total_wait_duration = Duration::ZERO;
+    let max_allowed_wait_duration = polling_duration;
+
+    loop {
+        if total_wait_duration >= max_allowed_wait_duration {
+            break Err(anyhow!(
+                "Polling failed after {} retries and a total of {:?} of wait time",
+                retries,
+                total_wait_duration
+            ));
+        }
+
+        match future().await? {
+            ControlFlow::Continue(()) => {
+                let next_wait_duration = match polling_wait_behavior {
+                    PollingWaitBehavior::Constant(duration) => duration,
+                    PollingWaitBehavior::ExponentialBackoff => {
+                        Duration::from_secs(2u64.pow(retries))
+                            .min(EXPONENTIAL_BACKOFF_MAX_WAIT_DURATION)
+                    }
+                };
+                let next_wait_duration =
+                    next_wait_duration.min(max_allowed_wait_duration - total_wait_duration);
+                total_wait_duration += next_wait_duration;
+                retries += 1;
+
+                tokio::time::sleep(next_wait_duration).await;
+            }
+            ControlFlow::Break(output) => {
+                break Ok(output);
+            }
+        }
+    }
+}
+
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+pub enum PollingWaitBehavior {
+    Constant(Duration),
+    #[default]
+    ExponentialBackoff,
+}

crates/common/src/iterators/files_with_extension_iterator.rs

@@ -0,0 +1,73 @@
+use std::{borrow::Cow, collections::HashSet, path::PathBuf};
+
+/// An iterator that finds files of a certain extension in the provided directory. You can think of
+/// this a glob pattern similar to: `${path}/**/*.md`
+pub struct FilesWithExtensionIterator {
+    /// The set of allowed extensions that that match the requirement and that should be returned
+    /// when found.
+    allowed_extensions: HashSet<Cow<'static, str>>,
+
+    /// The set of directories to visit next. This iterator does BFS and so these directories will
+    /// only be visited if we can't find any files in our state.
+    directories_to_search: Vec<PathBuf>,
+
+    /// The set of files matching the allowed extensions that were found. If there are entries in
+    /// this vector then they will be returned when the [`Iterator::next`] method is called. If not
+    /// then we visit one of the next directories to visit.
+    files_matching_allowed_extensions: Vec<PathBuf>,
+}
+
+impl FilesWithExtensionIterator {
+    pub fn new(root_directory: PathBuf) -> Self {
+        Self {
+            allowed_extensions: Default::default(),
+            directories_to_search: vec![root_directory],
+            files_matching_allowed_extensions: Default::default(),
+        }
+    }
+
+    pub fn with_allowed_extension(
+        mut self,
+        allowed_extension: impl Into<Cow<'static, str>>,
+    ) -> Self {
+        self.allowed_extensions.insert(allowed_extension.into());
+        self
+    }
+}
+
+impl Iterator for FilesWithExtensionIterator {
+    type Item = PathBuf;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if let Some(file_path) = self.files_matching_allowed_extensions.pop() {
+            return Some(file_path);
+        };
+
+        let directory_to_search = self.directories_to_search.pop()?;
+
+        // Read all of the entries in the directory. If we failed to read this dir's entires then we
+        // elect to just ignore it and look in the next directory, we do that by calling the next
+        // method again on the iterator, which is an intentional decision that we made here instead
+        // of panicking.
+        let Ok(dir_entries) = std::fs::read_dir(directory_to_search) else {
+            return self.next();
+        };
+
+        for entry in dir_entries.flatten() {
+            let entry_path = entry.path();
+            if entry_path.is_dir() {
+                self.directories_to_search.push(entry_path)
+            } else if entry_path.is_file()
+                && entry_path.extension().is_some_and(|ext| {
+                    self.allowed_extensions
+                        .iter()
+                        .any(|allowed| ext.eq_ignore_ascii_case(allowed.as_ref()))
+                })
+            {
+                self.files_matching_allowed_extensions.push(entry_path)
+            }
+        }
+
+        self.next()
+    }
+}

crates/common/src/iterators/mod.rs

@@ -0,0 +1,3 @@
+mod files_with_extension_iterator;
+
+pub use files_with_extension_iterator::*;

crates/common/src/lib.rs

@@ -0,0 +1,8 @@
+//! This crate provides common concepts, functionality, types, macros, and more that other crates in
+//! the workspace can benefit from.
+
+pub mod fs;
+pub mod futures;
+pub mod iterators;
+pub mod macros;
+pub mod types;

crates/common/src/macros/define_wrapper_type.rs

@@ -0,0 +1,106 @@
+/// Defines wrappers around types.
+///
+/// For example, the macro invocation seen below:
+///
+/// ```rust,ignore
+/// define_wrapper_type!(CaseId => usize);
+/// ```
+///
+/// Would define a wrapper type that looks like the following:
+///
+/// ```rust,ignore
+/// pub struct CaseId(usize);
+/// ```
+///
+/// And would also implement a number of methods on this type making it easier to use.
+///
+/// These wrapper types become very useful as they make the code a lot easier to read.
+///
+/// Take the following as an example:
+///
+/// ```rust,ignore
+/// struct State {
+///     contracts: HashMap<usize, HashMap<String, Vec<u8>>>
+/// }
+/// ```
+///
+/// In the above code it's hard to understand what the various types refer to or what to expect them
+/// to contain.
+///
+/// With these wrapper types we're able to create code that's self-documenting in that the types
+/// tell us what the code is referring to. The above code is transformed into
+///
+/// ```rust,ignore
+/// struct State {
+///     contracts: HashMap<CaseId, HashMap<ContractName, ContractByteCode>>
+/// }
+/// ```
+///
+/// Note that we follow the same syntax for defining wrapper structs but we do not permit the use of
+/// generics.
+#[macro_export]
+macro_rules! define_wrapper_type {
+    (
+        $(#[$meta: meta])*
+        $vis:vis struct $ident: ident($ty: ty);
+    ) => {
+        $(#[$meta])*
+        $vis struct $ident($ty);
+
+        impl $ident {
+            pub fn new(value: impl Into<$ty>) -> Self {
+                Self(value.into())
+            }
+
+            pub fn into_inner(self) -> $ty {
+                self.0
+            }
+
+            pub fn as_inner(&self) -> &$ty {
+                &self.0
+            }
+        }
+
+        impl AsRef<$ty> for $ident {
+            fn as_ref(&self) -> &$ty {
+                &self.0
+            }
+        }
+
+        impl AsMut<$ty> for $ident {
+            fn as_mut(&mut self) -> &mut $ty {
+                &mut self.0
+            }
+        }
+
+        impl std::ops::Deref for $ident {
+            type Target = $ty;
+
+            fn deref(&self) -> &Self::Target {
+                &self.0
+            }
+        }
+
+        impl std::ops::DerefMut for $ident {
+            fn deref_mut(&mut self) -> &mut Self::Target {
+                &mut self.0
+            }
+        }
+
+        impl From<$ty> for $ident {
+            fn from(value: $ty) -> Self {
+                Self(value)
+            }
+        }
+
+        impl From<$ident> for $ty {
+            fn from(value: $ident) -> Self {
+                value.0
+            }
+        }
+    };
+}
+
+/// Technically not needed but this allows for the macro to be found in the `macros` module of the
+/// crate in addition to being found in the root of the crate.
+pub use define_wrapper_type;

crates/common/src/macros/mod.rs

@@ -0,0 +1,3 @@
+mod define_wrapper_type;
+
+pub use define_wrapper_type::*;

crates/common/src/types/mod.rs

@@ -0,0 +1,3 @@
+mod version_or_requirement;
+
+pub use version_or_requirement::*;

crates/common/src/types/version_or_requirement.rs

@@ -0,0 +1,41 @@
+use semver::{Version, VersionReq};
+
+#[derive(Clone, Debug)]
+pub enum VersionOrRequirement {
+    Version(Version),
+    Requirement(VersionReq),
+}
+
+impl From<Version> for VersionOrRequirement {
+    fn from(value: Version) -> Self {
+        Self::Version(value)
+    }
+}
+
+impl From<VersionReq> for VersionOrRequirement {
+    fn from(value: VersionReq) -> Self {
+        Self::Requirement(value)
+    }
+}
+
+impl TryFrom<VersionOrRequirement> for Version {
+    type Error = anyhow::Error;
+
+    fn try_from(value: VersionOrRequirement) -> Result<Self, Self::Error> {
+        let VersionOrRequirement::Version(version) = value else {
+            anyhow::bail!("Version or requirement was not a version");
+        };
+        Ok(version)
+    }
+}
+
+impl TryFrom<VersionOrRequirement> for VersionReq {
+    type Error = anyhow::Error;
+
+    fn try_from(value: VersionOrRequirement) -> Result<Self, Self::Error> {
+        let VersionOrRequirement::Requirement(requirement) = value else {
+            anyhow::bail!("Version or requirement was not a requirement");
+        };
+        Ok(requirement)
+    }
+}

crates/compiler/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "revive-dt-compiler"
+description = "Library for compiling Solidity contracts to EVM and PVM"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+revive-solc-json-interface = { workspace = true }
+revive-dt-common = { workspace = true }
+revive-dt-config = { workspace = true }
+revive-dt-solc-binaries = { workspace = true }
+revive-common = { workspace = true }
+
+alloy = { workspace = true }
+alloy-primitives = { workspace = true }
+anyhow = { workspace = true }
+foundry-compilers-artifacts = { workspace = true }
+semver = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }
+tracing = { workspace = true }
+tokio = { workspace = true }

crates/compiler/src/lib.rs

@@ -0,0 +1,162 @@
+//! This crate provides compiler helpers for all supported Solidity targets:
+//! - Ethereum solc compiler
+//! - Polkadot revive resolc compiler
+//! - Polkadot revive Wasm compiler
+
+use std::{
+    collections::HashMap,
+    fs::read_to_string,
+    hash::Hash,
+    path::{Path, PathBuf},
+};
+
+use alloy::json_abi::JsonAbi;
+use alloy_primitives::Address;
+use semver::Version;
+use serde::{Deserialize, Serialize};
+
+use revive_common::EVMVersion;
+use revive_dt_common::types::VersionOrRequirement;
+use revive_dt_config::Arguments;
+
+pub mod revive_js;
+pub mod revive_resolc;
+pub mod solc;
+
+/// A common interface for all supported Solidity compilers.
+pub trait SolidityCompiler {
+    /// Extra options specific to the compiler.
+    type Options: Default + PartialEq + Eq + Hash;
+
+    /// The low-level compiler interface.
+    fn build(
+        &self,
+        input: CompilerInput,
+        additional_options: Self::Options,
+    ) -> impl Future<Output = anyhow::Result<CompilerOutput>>;
+
+    fn new(solc_executable: PathBuf) -> Self;
+
+    fn get_compiler_executable(
+        config: &Arguments,
+        version: impl Into<VersionOrRequirement>,
+    ) -> impl Future<Output = anyhow::Result<PathBuf>>;
+
+    fn version(&self) -> anyhow::Result<Version>;
+}
+
+/// The generic compilation input configuration.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CompilerInput {
+    pub enable_optimization: Option<bool>,
+    pub via_ir: Option<bool>,
+    pub evm_version: Option<EVMVersion>,
+    pub allow_paths: Vec<PathBuf>,
+    pub base_path: Option<PathBuf>,
+    pub sources: HashMap<PathBuf, String>,
+    pub libraries: HashMap<PathBuf, HashMap<String, Address>>,
+}
+
+/// The generic compilation output configuration.
+#[derive(Debug, Clone, Default, Serialize, Deserialize)]
+pub struct CompilerOutput {
+    /// The compiled contracts. The bytecode of the contract is kept as a string incase linking is
+    /// required and the compiled source has placeholders.
+    pub contracts: HashMap<PathBuf, HashMap<String, (String, JsonAbi)>>,
+}
+
+/// A generic builder style interface for configuring the supported compiler options.
+pub struct Compiler<T: SolidityCompiler> {
+    input: CompilerInput,
+    additional_options: T::Options,
+}
+
+impl Default for Compiler<solc::Solc> {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl<T> Compiler<T>
+where
+    T: SolidityCompiler,
+{
+    pub fn new() -> Self {
+        Self {
+            input: CompilerInput {
+                enable_optimization: Default::default(),
+                via_ir: Default::default(),
+                evm_version: Default::default(),
+                allow_paths: Default::default(),
+                base_path: Default::default(),
+                sources: Default::default(),
+                libraries: Default::default(),
+            },
+            additional_options: T::Options::default(),
+        }
+    }
+
+    pub fn with_optimization(mut self, value: impl Into<Option<bool>>) -> Self {
+        self.input.enable_optimization = value.into();
+        self
+    }
+
+    pub fn with_via_ir(mut self, value: impl Into<Option<bool>>) -> Self {
+        self.input.via_ir = value.into();
+        self
+    }
+
+    pub fn with_evm_version(mut self, version: impl Into<Option<EVMVersion>>) -> Self {
+        self.input.evm_version = version.into();
+        self
+    }
+
+    pub fn with_allow_path(mut self, path: impl AsRef<Path>) -> Self {
+        self.input.allow_paths.push(path.as_ref().into());
+        self
+    }
+
+    pub fn with_base_path(mut self, path: impl Into<Option<PathBuf>>) -> Self {
+        self.input.base_path = path.into();
+        self
+    }
+
+    pub fn with_source(mut self, path: impl AsRef<Path>) -> anyhow::Result<Self> {
+        self.input
+            .sources
+            .insert(path.as_ref().to_path_buf(), read_to_string(path.as_ref())?);
+        Ok(self)
+    }
+
+    pub fn with_library(
+        mut self,
+        path: impl AsRef<Path>,
+        name: impl AsRef<str>,
+        address: Address,
+    ) -> Self {
+        self.input
+            .libraries
+            .entry(path.as_ref().to_path_buf())
+            .or_default()
+            .insert(name.as_ref().into(), address);
+        self
+    }
+
+    pub fn with_additional_options(mut self, options: impl Into<T::Options>) -> Self {
+        self.additional_options = options.into();
+        self
+    }
+
+    pub async fn try_build(
+        self,
+        compiler_path: impl AsRef<Path>,
+    ) -> anyhow::Result<CompilerOutput> {
+        T::new(compiler_path.as_ref().to_path_buf())
+            .build(self.input, self.additional_options)
+            .await
+    }
+
+    pub fn input(&self) -> CompilerInput {
+        self.input.clone()
+    }
+}

crates/compiler/src/revive_js.rs

@@ -0,0 +1,2 @@
+//! Implements the [crate::SolidityCompiler] trait with revive Wasm for
+//! compiling contracts to PVM bytecode (via Wasm).

crates/compiler/src/revive_resolc.rs

@@ -0,0 +1,253 @@
+//! Implements the [SolidityCompiler] trait with `resolc` for
+//! compiling contracts to PolkaVM (PVM) bytecode.
+
+use std::{
+    path::PathBuf,
+    process::{Command, Stdio},
+};
+
+use revive_dt_common::types::VersionOrRequirement;
+use revive_dt_config::Arguments;
+use revive_solc_json_interface::{
+    SolcStandardJsonInput, SolcStandardJsonInputLanguage, SolcStandardJsonInputSettings,
+    SolcStandardJsonInputSettingsOptimizer, SolcStandardJsonInputSettingsSelection,
+    SolcStandardJsonOutput,
+};
+
+use crate::{CompilerInput, CompilerOutput, SolidityCompiler};
+
+use alloy::json_abi::JsonAbi;
+use anyhow::Context;
+use semver::Version;
+use tokio::{io::AsyncWriteExt, process::Command as AsyncCommand};
+
+// TODO: I believe that we need to also pass the solc compiler to resolc so that resolc uses the
+// specified solc compiler. I believe that currently we completely ignore the specified solc binary
+// when invoking resolc which doesn't seem right if we're using solc as a compiler frontend.
+
+/// A wrapper around the `resolc` binary, emitting PVM-compatible bytecode.
+#[derive(Debug)]
+pub struct Resolc {
+    /// Path to the `resolc` executable
+    resolc_path: PathBuf,
+}
+
+impl SolidityCompiler for Resolc {
+    type Options = Vec<String>;
+
+    #[tracing::instrument(level = "debug", ret)]
+    async fn build(
+        &self,
+        CompilerInput {
+            enable_optimization,
+            // Ignored and not honored since this is required for the resolc compilation.
+            via_ir: _via_ir,
+            evm_version,
+            allow_paths,
+            base_path,
+            sources,
+            libraries,
+        }: CompilerInput,
+        additional_options: Self::Options,
+    ) -> anyhow::Result<CompilerOutput> {
+        let input = SolcStandardJsonInput {
+            language: SolcStandardJsonInputLanguage::Solidity,
+            sources: sources
+                .into_iter()
+                .map(|(path, source)| (path.display().to_string(), source.into()))
+                .collect(),
+            settings: SolcStandardJsonInputSettings {
+                evm_version,
+                libraries: Some(
+                    libraries
+                        .into_iter()
+                        .map(|(source_code, libraries_map)| {
+                            (
+                                source_code.display().to_string(),
+                                libraries_map
+                                    .into_iter()
+                                    .map(|(library_ident, library_address)| {
+                                        (library_ident, library_address.to_string())
+                                    })
+                                    .collect(),
+                            )
+                        })
+                        .collect(),
+                ),
+                remappings: None,
+                output_selection: Some(SolcStandardJsonInputSettingsSelection::new_required()),
+                via_ir: Some(true),
+                optimizer: SolcStandardJsonInputSettingsOptimizer::new(
+                    enable_optimization.unwrap_or(false),
+                    None,
+                    &Version::new(0, 0, 0),
+                    false,
+                ),
+                metadata: None,
+                polkavm: None,
+            },
+        };
+
+        let mut command = AsyncCommand::new(&self.resolc_path);
+        command
+            .stdin(Stdio::piped())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .arg("--standard-json");
+
+        if let Some(ref base_path) = base_path {
+            command.arg("--base-path").arg(base_path);
+        }
+        if !allow_paths.is_empty() {
+            command.arg("--allow-paths").arg(
+                allow_paths
+                    .iter()
+                    .map(|path| path.display().to_string())
+                    .collect::<Vec<_>>()
+                    .join(","),
+            );
+        }
+        let mut child = command.spawn()?;
+
+        let stdin_pipe = child.stdin.as_mut().expect("stdin must be piped");
+        let serialized_input = serde_json::to_vec(&input)?;
+        stdin_pipe.write_all(&serialized_input).await?;
+
+        let output = child.wait_with_output().await?;
+        let stdout = output.stdout;
+        let stderr = output.stderr;
+
+        if !output.status.success() {
+            let json_in = serde_json::to_string_pretty(&input)?;
+            let message = String::from_utf8_lossy(&stderr);
+            tracing::error!(
+                status = %output.status,
+                message = %message,
+                json_input = json_in,
+                "Compilation using resolc failed"
+            );
+            anyhow::bail!("Compilation failed with an error: {message}");
+        }
+
+        let parsed = serde_json::from_slice::<SolcStandardJsonOutput>(&stdout).map_err(|e| {
+            anyhow::anyhow!(
+                "failed to parse resolc JSON output: {e}\nstderr: {}",
+                String::from_utf8_lossy(&stderr)
+            )
+        })?;
+
+        tracing::debug!(
+            output = %serde_json::to_string(&parsed).unwrap(),
+            "Compiled successfully"
+        );
+
+        // Detecting if the compiler output contained errors and reporting them through logs and
+        // errors instead of returning the compiler output that might contain errors.
+        for error in parsed.errors.iter().flatten() {
+            if error.severity == "error" {
+                tracing::error!(
+                    ?error,
+                    ?input,
+                    output = %serde_json::to_string(&parsed).unwrap(),
+                    "Encountered an error in the compilation"
+                );
+                anyhow::bail!("Encountered an error in the compilation: {error}")
+            }
+        }
+
+        let Some(contracts) = parsed.contracts else {
+            anyhow::bail!("Unexpected error - resolc output doesn't have a contracts section");
+        };
+
+        let mut compiler_output = CompilerOutput::default();
+        for (source_path, contracts) in contracts.into_iter() {
+            let source_path = PathBuf::from(source_path).canonicalize()?;
+
+            let map = compiler_output.contracts.entry(source_path).or_default();
+            for (contract_name, contract_information) in contracts.into_iter() {
+                let bytecode = contract_information
+                    .evm
+                    .and_then(|evm| evm.bytecode.clone())
+                    .context("Unexpected - Contract compiled with resolc has no bytecode")?;
+                let abi = contract_information
+                    .metadata
+                    .as_ref()
+                    .and_then(|metadata| metadata.as_object())
+                    .and_then(|metadata| metadata.get("solc_metadata"))
+                    .and_then(|solc_metadata| solc_metadata.as_str())
+                    .and_then(|metadata| serde_json::from_str::<serde_json::Value>(metadata).ok())
+                    .and_then(|metadata| {
+                        metadata.get("output").and_then(|output| {
+                            output
+                                .get("abi")
+                                .and_then(|abi| serde_json::from_value::<JsonAbi>(abi.clone()).ok())
+                        })
+                    })
+                    .context(
+                        "Unexpected - Failed to get the ABI for a contract compiled with resolc",
+                    )?;
+                map.insert(contract_name, (bytecode.object, abi));
+            }
+        }
+
+        Ok(compiler_output)
+    }
+
+    fn new(resolc_path: PathBuf) -> Self {
+        Resolc { resolc_path }
+    }
+
+    async fn get_compiler_executable(
+        config: &Arguments,
+        _version: impl Into<VersionOrRequirement>,
+    ) -> anyhow::Result<PathBuf> {
+        if !config.resolc.as_os_str().is_empty() {
+            return Ok(config.resolc.clone());
+        }
+
+        Ok(PathBuf::from("resolc"))
+    }
+
+    fn version(&self) -> anyhow::Result<semver::Version> {
+        // Logic for parsing the resolc version from the following string:
+        // Solidity frontend for the revive compiler version 0.3.0+commit.b238913.llvm-18.1.8
+
+        let output = Command::new(self.resolc_path.as_path())
+            .arg("--version")
+            .stdout(Stdio::piped())
+            .spawn()?
+            .wait_with_output()?
+            .stdout;
+        let output = String::from_utf8_lossy(&output);
+        let version_string = output
+            .split("version ")
+            .nth(1)
+            .context("Version parsing failed")?
+            .split("+")
+            .next()
+            .context("Version parsing failed")?;
+
+        Version::parse(version_string).map_err(Into::into)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[tokio::test]
+    async fn compiler_version_can_be_obtained() {
+        // Arrange
+        let args = Arguments::default();
+        let path = Resolc::get_compiler_executable(&args, Version::new(0, 7, 6))
+            .await
+            .unwrap();
+        let compiler = Resolc::new(path);
+
+        // Act
+        let version = compiler.version();
+
+        // Assert
+        let _ = version.expect("Failed to get version");
+    }
+}

crates/compiler/src/solc.rs

@@ -0,0 +1,262 @@
+//! Implements the [SolidityCompiler] trait with solc for
+//! compiling contracts to EVM bytecode.
+
+use std::{
+    path::PathBuf,
+    process::{Command, Stdio},
+};
+
+use revive_dt_common::types::VersionOrRequirement;
+use revive_dt_config::Arguments;
+use revive_dt_solc_binaries::download_solc;
+
+use crate::{CompilerInput, CompilerOutput, SolidityCompiler};
+
+use anyhow::Context;
+use foundry_compilers_artifacts::{
+    output_selection::{
+        BytecodeOutputSelection, ContractOutputSelection, EvmOutputSelection, OutputSelection,
+    },
+    solc::CompilerOutput as SolcOutput,
+    solc::*,
+};
+use semver::Version;
+use tokio::{io::AsyncWriteExt, process::Command as AsyncCommand};
+
+#[derive(Debug)]
+pub struct Solc {
+    solc_path: PathBuf,
+}
+
+impl SolidityCompiler for Solc {
+    type Options = ();
+
+    #[tracing::instrument(level = "debug", ret)]
+    async fn build(
+        &self,
+        CompilerInput {
+            enable_optimization,
+            via_ir,
+            evm_version,
+            allow_paths,
+            base_path,
+            sources,
+            libraries,
+        }: CompilerInput,
+        _: Self::Options,
+    ) -> anyhow::Result<CompilerOutput> {
+        let input = SolcInput {
+            language: SolcLanguage::Solidity,
+            sources: Sources(
+                sources
+                    .into_iter()
+                    .map(|(source_path, source_code)| (source_path, Source::new(source_code)))
+                    .collect(),
+            ),
+            settings: Settings {
+                optimizer: Optimizer {
+                    enabled: enable_optimization,
+                    details: Some(Default::default()),
+                    ..Default::default()
+                },
+                output_selection: OutputSelection::common_output_selection(
+                    [
+                        ContractOutputSelection::Abi,
+                        ContractOutputSelection::Evm(EvmOutputSelection::ByteCode(
+                            BytecodeOutputSelection::Object,
+                        )),
+                    ]
+                    .into_iter()
+                    .map(|item| item.to_string()),
+                ),
+                evm_version: evm_version.map(|version| version.to_string().parse().unwrap()),
+                via_ir,
+                libraries: Libraries {
+                    libs: libraries
+                        .into_iter()
+                        .map(|(file_path, libraries)| {
+                            (
+                                file_path,
+                                libraries
+                                    .into_iter()
+                                    .map(|(library_name, library_address)| {
+                                        (library_name, library_address.to_string())
+                                    })
+                                    .collect(),
+                            )
+                        })
+                        .collect(),
+                },
+                ..Default::default()
+            },
+        };
+
+        let mut command = AsyncCommand::new(&self.solc_path);
+        command
+            .stdin(Stdio::piped())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::piped())
+            .arg("--standard-json");
+
+        if let Some(ref base_path) = base_path {
+            command.arg("--base-path").arg(base_path);
+        }
+        if !allow_paths.is_empty() {
+            command.arg("--allow-paths").arg(
+                allow_paths
+                    .iter()
+                    .map(|path| path.display().to_string())
+                    .collect::<Vec<_>>()
+                    .join(","),
+            );
+        }
+        let mut child = command.spawn()?;
+
+        let stdin = child.stdin.as_mut().expect("should be piped");
+        let serialized_input = serde_json::to_vec(&input)?;
+        stdin.write_all(&serialized_input).await?;
+        let output = child.wait_with_output().await?;
+
+        if !output.status.success() {
+            let json_in = serde_json::to_string_pretty(&input)?;
+            let message = String::from_utf8_lossy(&output.stderr);
+            tracing::error!(
+                status = %output.status,
+                message = %message,
+                json_input = json_in,
+                "Compilation using solc failed"
+            );
+            anyhow::bail!("Compilation failed with an error: {message}");
+        }
+
+        let parsed = serde_json::from_slice::<SolcOutput>(&output.stdout).map_err(|e| {
+            anyhow::anyhow!(
+                "failed to parse resolc JSON output: {e}\nstderr: {}",
+                String::from_utf8_lossy(&output.stdout)
+            )
+        })?;
+
+        // Detecting if the compiler output contained errors and reporting them through logs and
+        // errors instead of returning the compiler output that might contain errors.
+        for error in parsed.errors.iter() {
+            if error.severity == Severity::Error {
+                tracing::error!(?error, ?input, "Encountered an error in the compilation");
+                anyhow::bail!("Encountered an error in the compilation: {error}")
+            }
+        }
+
+        tracing::debug!(
+            output = %String::from_utf8_lossy(&output.stdout).to_string(),
+            "Compiled successfully"
+        );
+
+        let mut compiler_output = CompilerOutput::default();
+        for (contract_path, contracts) in parsed.contracts {
+            let map = compiler_output
+                .contracts
+                .entry(contract_path.canonicalize()?)
+                .or_default();
+            for (contract_name, contract_info) in contracts.into_iter() {
+                let source_code = contract_info
+                    .evm
+                    .and_then(|evm| evm.bytecode)
+                    .map(|bytecode| match bytecode.object {
+                        BytecodeObject::Bytecode(bytecode) => bytecode.to_string(),
+                        BytecodeObject::Unlinked(unlinked) => unlinked,
+                    })
+                    .context("Unexpected - contract compiled with solc has no source code")?;
+                let abi = contract_info
+                    .abi
+                    .context("Unexpected - contract compiled with solc as no ABI")?;
+                map.insert(contract_name, (source_code, abi));
+            }
+        }
+
+        Ok(compiler_output)
+    }
+
+    fn new(solc_path: PathBuf) -> Self {
+        Self { solc_path }
+    }
+
+    async fn get_compiler_executable(
+        config: &Arguments,
+        version: impl Into<VersionOrRequirement>,
+    ) -> anyhow::Result<PathBuf> {
+        let path = download_solc(config.directory(), version, config.wasm).await?;
+        Ok(path)
+    }
+
+    fn version(&self) -> anyhow::Result<semver::Version> {
+        // The following is the parsing code for the version from the solc version strings which
+        // look like the following:
+        // ```
+        // solc, the solidity compiler commandline interface
+        // Version: 0.8.30+commit.73712a01.Darwin.appleclang
+        // ```
+
+        let child = Command::new(self.solc_path.as_path())
+            .arg("--version")
+            .stdout(Stdio::piped())
+            .spawn()?;
+        let output = child.wait_with_output()?;
+        let output = String::from_utf8_lossy(&output.stdout);
+        let version_line = output
+            .split("Version: ")
+            .nth(1)
+            .context("Version parsing failed")?;
+        let version_string = version_line
+            .split("+")
+            .next()
+            .context("Version parsing failed")?;
+
+        Version::parse(version_string).map_err(Into::into)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[tokio::test]
+    async fn compiler_version_can_be_obtained() {
+        // Arrange
+        let args = Arguments::default();
+        println!("Getting compiler path");
+        let path = Solc::get_compiler_executable(&args, Version::new(0, 7, 6))
+            .await
+            .unwrap();
+        println!("Got compiler path");
+        let compiler = Solc::new(path);
+
+        // Act
+        let version = compiler.version();
+
+        // Assert
+        assert_eq!(
+            version.expect("Failed to get version"),
+            Version::new(0, 7, 6)
+        )
+    }
+
+    #[tokio::test]
+    async fn compiler_version_can_be_obtained1() {
+        // Arrange
+        let args = Arguments::default();
+        println!("Getting compiler path");
+        let path = Solc::get_compiler_executable(&args, Version::new(0, 4, 21))
+            .await
+            .unwrap();
+        println!("Got compiler path");
+        let compiler = Solc::new(path);
+
+        // Act
+        let version = compiler.version();
+
+        // Assert
+        assert_eq!(
+            version.expect("Failed to get version"),
+            Version::new(0, 4, 21)
+        )
+    }
+}

crates/compiler/tests/assets/array_one_element/callable.sol

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity >=0.6.9;
+
+contract Callable {
+    function f(uint[1] memory p1) public pure returns(uint) {
+        return p1[0];
+    }
+}

crates/compiler/tests/assets/array_one_element/main.sol

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: MIT
+
+// Report https://linear.app/matterlabs/issue/CPR-269/call-with-calldata-variable-bug
+
+pragma solidity >=0.6.9;
+
+import "./callable.sol";
+
+contract Main {
+    function main(uint[1] calldata p1, Callable callable) public returns(uint) {
+        return callable.f(p1);
+    }
+}

crates/compiler/tests/assets/array_one_element/test.json

@@ -0,0 +1,21 @@
+{ "cases": [ {
+    "name": "first",
+    "inputs": [
+        {
+            "instance": "Main",
+            "method": "main",
+            "calldata": [
+                "1",
+                "Callable.address"
+            ]
+        }
+    ],
+    "expected": [
+        "1"
+    ]
+} ],
+    "contracts": {
+        "Main": "main.sol:Main",
+        "Callable": "callable.sol:Callable"
+    }
+}

crates/compiler/tests/lib.rs

@@ -0,0 +1,88 @@
+use std::path::PathBuf;
+
+use revive_dt_compiler::{Compiler, SolidityCompiler, revive_resolc::Resolc, solc::Solc};
+use revive_dt_config::Arguments;
+use semver::Version;
+
+#[tokio::test]
+async fn contracts_can_be_compiled_with_solc() {
+    // Arrange
+    let args = Arguments::default();
+    let compiler_path = Solc::get_compiler_executable(&args, Version::new(0, 8, 30))
+        .await
+        .unwrap();
+    println!("About to assert");
+
+    // Act
+    let output = Compiler::<Solc>::new()
+        .with_source("./tests/assets/array_one_element/callable.sol")
+        .unwrap()
+        .with_source("./tests/assets/array_one_element/main.sol")
+        .unwrap()
+        .try_build(compiler_path)
+        .await;
+
+    // Assert
+    let output = output.expect("Failed to compile");
+    assert_eq!(output.contracts.len(), 2);
+
+    let main_file_contracts = output
+        .contracts
+        .get(
+            &PathBuf::from("./tests/assets/array_one_element/main.sol")
+                .canonicalize()
+                .unwrap(),
+        )
+        .unwrap();
+    let callable_file_contracts = output
+        .contracts
+        .get(
+            &PathBuf::from("./tests/assets/array_one_element/callable.sol")
+                .canonicalize()
+                .unwrap(),
+        )
+        .unwrap();
+    assert!(main_file_contracts.contains_key("Main"));
+    assert!(callable_file_contracts.contains_key("Callable"));
+}
+
+#[tokio::test]
+async fn contracts_can_be_compiled_with_resolc() {
+    // Arrange
+    let args = Arguments::default();
+    let compiler_path = Resolc::get_compiler_executable(&args, Version::new(0, 8, 30))
+        .await
+        .unwrap();
+
+    // Act
+    let output = Compiler::<Resolc>::new()
+        .with_source("./tests/assets/array_one_element/callable.sol")
+        .unwrap()
+        .with_source("./tests/assets/array_one_element/main.sol")
+        .unwrap()
+        .try_build(compiler_path)
+        .await;
+
+    // Assert
+    let output = output.expect("Failed to compile");
+    assert_eq!(output.contracts.len(), 2);
+
+    let main_file_contracts = output
+        .contracts
+        .get(
+            &PathBuf::from("./tests/assets/array_one_element/main.sol")
+                .canonicalize()
+                .unwrap(),
+        )
+        .unwrap();
+    let callable_file_contracts = output
+        .contracts
+        .get(
+            &PathBuf::from("./tests/assets/array_one_element/callable.sol")
+                .canonicalize()
+                .unwrap(),
+        )
+        .unwrap();
+    assert!(main_file_contracts.contains_key("Main"));
+    assert!(callable_file_contracts.contains_key("Callable"));
+}

crates/config/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "revive-dt-config"
+description = "global configuration for the revive differential tester"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+alloy = { workspace = true }
+clap = { workspace = true }
+semver = { workspace = true }
+temp-dir = { workspace = true }
+serde = { workspace = true }
+

crates/config/src/lib.rs

@@ -0,0 +1,184 @@
+//! The global configuration used across all revive differential testing crates.
+
+use std::{
+    fmt::Display,
+    path::{Path, PathBuf},
+    sync::LazyLock,
+};
+
+use alloy::{network::EthereumWallet, signers::local::PrivateKeySigner};
+use clap::{Parser, ValueEnum};
+use semver::Version;
+use serde::{Deserialize, Serialize};
+use temp_dir::TempDir;
+
+#[derive(Debug, Parser, Clone, Serialize, Deserialize)]
+#[command(name = "retester")]
+pub struct Arguments {
+    /// The `solc` version to use if the test didn't specify it explicitly.
+    #[arg(long = "solc", short, default_value = "0.8.29")]
+    pub solc: Version,
+
+    /// Use the Wasm compiler versions.
+    #[arg(long = "wasm")]
+    pub wasm: bool,
+
+    /// The path to the `resolc` executable to be tested.
+    ///
+    /// By default it uses the `resolc` binary found in `$PATH`.
+    ///
+    /// If `--wasm` is set, this should point to the resolc Wasm ile.
+    #[arg(long = "resolc", short, default_value = "resolc")]
+    pub resolc: PathBuf,
+
+    /// A list of test corpus JSON files to be tested.
+    #[arg(long = "corpus", short)]
+    pub corpus: Vec<PathBuf>,
+
+    /// A place to store temporary artifacts during test execution.
+    ///
+    /// Creates a temporary dir if not specified.
+    #[arg(long = "workdir", short)]
+    pub working_directory: Option<PathBuf>,
+
+    /// Add a tempdir manually if `working_directory` was not given.
+    ///
+    /// We attach it here because [TempDir] prunes itself on drop.
+    #[clap(skip)]
+    #[serde(skip)]
+    pub temp_dir: Option<&'static TempDir>,
+
+    /// The path to the `geth` executable.
+    ///
+    /// By default it uses `geth` binary found in `$PATH`.
+    #[arg(short, long = "geth", default_value = "geth")]
+    pub geth: PathBuf,
+
+    /// The maximum time in milliseconds to wait for geth to start.
+    #[arg(long = "geth-start-timeout", default_value = "5000")]
+    pub geth_start_timeout: u64,
+
+    /// The test network chain ID.
+    #[arg(short, long = "network-id", default_value = "420420420")]
+    pub network_id: u64,
+
+    /// Configure nodes according to this genesis.json file.
+    #[arg(long = "genesis", default_value = "genesis.json")]
+    pub genesis_file: PathBuf,
+
+    /// The signing account private key.
+    #[arg(
+        short,
+        long = "account",
+        default_value = "0x4f3edf983ac636a65a842ce7c78d9aa706d3b113bce9c46f30d7d21715b23b1d"
+    )]
+    pub account: String,
+
+    /// This argument controls which private keys the nodes should have access to and be added to
+    /// its wallet signers. With a value of N, private keys (0, N] will be added to the signer set
+    /// of the node.
+    #[arg(long = "private-keys-count", default_value_t = 100_000)]
+    pub private_keys_to_add: usize,
+
+    /// The differential testing leader node implementation.
+    #[arg(short, long = "leader", default_value = "geth")]
+    pub leader: TestingPlatform,
+
+    /// The differential testing follower node implementation.
+    #[arg(short, long = "follower", default_value = "kitchensink")]
+    pub follower: TestingPlatform,
+
+    /// Only compile against this testing platform (doesn't execute the tests).
+    #[arg(long = "compile-only")]
+    pub compile_only: Option<TestingPlatform>,
+
+    /// Determines the amount of nodes that will be spawned for each chain.
+    #[arg(long, default_value = "1")]
+    pub number_of_nodes: usize,
+
+    /// Determines the amount of threads that will will be used.
+    #[arg(long, default_value = "12")]
+    pub number_of_threads: usize,
+
+    /// Extract problems back to the test corpus.
+    #[arg(short, long = "extract-problems")]
+    pub extract_problems: bool,
+
+    /// The path to the `kitchensink` executable.
+    ///
+    /// By default it uses `substrate-node` binary found in `$PATH`.
+    #[arg(short, long = "kitchensink", default_value = "substrate-node")]
+    pub kitchensink: PathBuf,
+
+    /// The path to the `eth_proxy` executable.
+    ///
+    /// By default it uses `eth-rpc` binary found in `$PATH`.
+    #[arg(short = 'p', long = "eth_proxy", default_value = "eth-rpc")]
+    pub eth_proxy: PathBuf,
+}
+
+impl Arguments {
+    /// Return the configured working directory with the following precedence:
+    /// 1. `self.working_directory` if it was provided.
+    /// 2. `self.temp_dir` if it it was provided
+    /// 3. Panic.
+    pub fn directory(&self) -> &Path {
+        if let Some(path) = &self.working_directory {
+            return path.as_path();
+        }
+
+        if let Some(temp_dir) = &self.temp_dir {
+            return temp_dir.path();
+        }
+
+        panic!("should have a workdir configured")
+    }
+
+    /// Try to parse `self.account` into a [PrivateKeySigner],
+    /// panicing on error.
+    pub fn wallet(&self) -> EthereumWallet {
+        let signer = self
+            .account
+            .parse::<PrivateKeySigner>()
+            .unwrap_or_else(|error| {
+                panic!("private key '{}' parsing error: {error}", self.account);
+            });
+        EthereumWallet::new(signer)
+    }
+}
+
+impl Default for Arguments {
+    fn default() -> Self {
+        static TEMP_DIR: LazyLock<TempDir> = LazyLock::new(|| TempDir::new().unwrap());
+
+        let default = Arguments::parse_from(["retester"]);
+
+        Arguments {
+            temp_dir: Some(&TEMP_DIR),
+            ..default
+        }
+    }
+}
+
+/// The Solidity compatible node implementation.
+///
+/// This describes the solutions to be tested against on a high level.
+#[derive(
+    Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, ValueEnum, Serialize, Deserialize,
+)]
+#[clap(rename_all = "lower")]
+pub enum TestingPlatform {
+    /// The go-ethereum reference full node EVM implementation.
+    Geth,
+    /// The kitchensink runtime provides the PolkaVM (PVM) based node implentation.
+    Kitchensink,
+}
+
+impl Display for TestingPlatform {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Geth => f.write_str("geth"),
+            Self::Kitchensink => f.write_str("revive"),
+        }
+    }
+}

crates/core/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "revive-dt-core"
+description = "revive differential testing core utility"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[[bin]]
+name = "retester"
+path = "src/main.rs"
+
+[dependencies]
+revive-dt-common = { workspace = true }
+revive-dt-compiler = { workspace = true }
+revive-dt-config = { workspace = true }
+revive-dt-format = { workspace = true }
+revive-dt-node = { workspace = true }
+revive-dt-node-interaction = { workspace = true }
+revive-dt-report = { workspace = true }
+
+alloy = { workspace = true }
+anyhow = { workspace = true }
+clap = { workspace = true }
+futures = { workspace = true }
+indexmap = { workspace = true }
+tokio = { workspace = true }
+tracing = { workspace = true }
+tracing-subscriber = { workspace = true }
+semver = { workspace = true }
+temp-dir = { workspace = true }

crates/core/src/driver/mod.rs

@@ -0,0 +1,751 @@
+//! The test driver handles the compilation and execution of the test cases.
+
+use std::collections::HashMap;
+use std::marker::PhantomData;
+use std::path::PathBuf;
+
+use alloy::eips::BlockNumberOrTag;
+use alloy::hex;
+use alloy::json_abi::JsonAbi;
+use alloy::network::{Ethereum, TransactionBuilder};
+use alloy::primitives::{BlockNumber, U256};
+use alloy::rpc::types::TransactionReceipt;
+use alloy::rpc::types::trace::geth::{
+    CallFrame, GethDebugBuiltInTracerType, GethDebugTracerType, GethDebugTracingOptions, GethTrace,
+    PreStateConfig,
+};
+use alloy::{
+    primitives::Address,
+    rpc::types::{
+        TransactionRequest,
+        trace::geth::{AccountState, DiffMode},
+    },
+};
+use anyhow::Context;
+use indexmap::IndexMap;
+use revive_dt_format::traits::ResolverApi;
+use semver::Version;
+
+use revive_dt_format::case::{Case, CaseIdx};
+use revive_dt_format::input::{Calldata, EtherValue, Expected, ExpectedOutput, Method};
+use revive_dt_format::metadata::{ContractInstance, ContractPathAndIdent};
+use revive_dt_format::{input::Input, metadata::Metadata};
+use revive_dt_node::Node;
+use revive_dt_node_interaction::EthereumNode;
+use tracing::Instrument;
+
+use crate::Platform;
+
+pub struct CaseState<T: Platform> {
+    /// A map of all of the compiled contracts for the given metadata file.
+    compiled_contracts: HashMap<PathBuf, HashMap<String, (String, JsonAbi)>>,
+
+    /// This map stores the contracts deployments for this case.
+    deployed_contracts: HashMap<ContractInstance, (Address, JsonAbi)>,
+
+    /// This map stores the variables used for each one of the cases contained in the metadata
+    /// file.
+    variables: HashMap<String, U256>,
+
+    /// Stores the version used for the current case.
+    compiler_version: Version,
+
+    phantom: PhantomData<T>,
+}
+
+impl<T> CaseState<T>
+where
+    T: Platform,
+{
+    pub fn new(
+        compiler_version: Version,
+        compiled_contracts: HashMap<PathBuf, HashMap<String, (String, JsonAbi)>>,
+        deployed_contracts: HashMap<ContractInstance, (Address, JsonAbi)>,
+    ) -> Self {
+        Self {
+            compiled_contracts,
+            deployed_contracts,
+            variables: Default::default(),
+            compiler_version,
+            phantom: PhantomData,
+        }
+    }
+
+    pub async fn handle_input(
+        &mut self,
+        metadata: &Metadata,
+        case_idx: CaseIdx,
+        input: &Input,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<(TransactionReceipt, GethTrace, DiffMode)> {
+        let deployment_receipts = self
+            .handle_contract_deployment(metadata, case_idx, input, node)
+            .await?;
+        let execution_receipt = self
+            .handle_input_execution(input, deployment_receipts, node)
+            .await?;
+        let tracing_result = self
+            .handle_input_call_frame_tracing(&execution_receipt, node)
+            .await?;
+        self.handle_input_variable_assignment(input, &tracing_result)?;
+        let resolver = BlockPinnedResolver::<'_, T> {
+            node,
+            block_number: execution_receipt
+                .block_number
+                .context("Transaction was not included in a block")?,
+        };
+        self.handle_input_expectations(input, &execution_receipt, &resolver, &tracing_result)
+            .await?;
+        self.handle_input_diff(case_idx, execution_receipt, node)
+            .await
+    }
+
+    /// Handles the contract deployment for a given input performing it if it needs to be performed.
+    async fn handle_contract_deployment(
+        &mut self,
+        metadata: &Metadata,
+        case_idx: CaseIdx,
+        input: &Input,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<HashMap<ContractInstance, TransactionReceipt>> {
+        let span = tracing::debug_span!(
+            "Handling contract deployment",
+            ?case_idx,
+            instance = ?input.instance
+        );
+        let _guard = span.enter();
+
+        let mut instances_we_must_deploy = IndexMap::<ContractInstance, bool>::new();
+        for instance in input.find_all_contract_instances().into_iter() {
+            if !self.deployed_contracts.contains_key(&instance) {
+                instances_we_must_deploy.entry(instance).or_insert(false);
+            }
+        }
+        if let Method::Deployer = input.method {
+            instances_we_must_deploy.swap_remove(&input.instance);
+            instances_we_must_deploy.insert(input.instance.clone(), true);
+        }
+
+        tracing::debug!(
+            instances_to_deploy = instances_we_must_deploy.len(),
+            "Computed the number of required deployments for input"
+        );
+
+        let mut receipts = HashMap::new();
+        for (instance, deploy_with_constructor_arguments) in instances_we_must_deploy.into_iter() {
+            let calldata = deploy_with_constructor_arguments.then_some(&input.calldata);
+            let value = deploy_with_constructor_arguments
+                .then_some(input.value)
+                .flatten();
+
+            if let (_, _, Some(receipt)) = self
+                .get_or_deploy_contract_instance(
+                    &instance,
+                    metadata,
+                    input.caller,
+                    calldata,
+                    value,
+                    node,
+                )
+                .await?
+            {
+                receipts.insert(instance.clone(), receipt);
+            }
+        }
+
+        Ok(receipts)
+    }
+
+    /// Handles the execution of the input in terms of the calls that need to be made.
+    async fn handle_input_execution(
+        &mut self,
+        input: &Input,
+        mut deployment_receipts: HashMap<ContractInstance, TransactionReceipt>,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<TransactionReceipt> {
+        match input.method {
+            // This input was already executed when `handle_input` was called. We just need to
+            // lookup the transaction receipt in this case and continue on.
+            Method::Deployer => deployment_receipts
+                .remove(&input.instance)
+                .context("Failed to find deployment receipt"),
+            Method::Fallback | Method::FunctionName(_) => {
+                let tx = match input
+                    .legacy_transaction(&self.deployed_contracts, &self.variables, node)
+                    .await
+                {
+                    Ok(tx) => {
+                        tracing::debug!("Legacy transaction data: {tx:#?}");
+                        tx
+                    }
+                    Err(err) => {
+                        tracing::error!("Failed to construct legacy transaction: {err:?}");
+                        return Err(err);
+                    }
+                };
+
+                tracing::trace!("Executing transaction for input: {input:?}");
+
+                match node.execute_transaction(tx).await {
+                    Ok(receipt) => Ok(receipt),
+                    Err(err) => {
+                        tracing::error!(
+                            "Failed to execute transaction when executing the contract: {}, {:?}",
+                            &*input.instance,
+                            err
+                        );
+                        Err(err)
+                    }
+                }
+            }
+        }
+    }
+
+    async fn handle_input_call_frame_tracing(
+        &self,
+        execution_receipt: &TransactionReceipt,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<CallFrame> {
+        node.trace_transaction(
+            execution_receipt,
+            GethDebugTracingOptions {
+                tracer: Some(GethDebugTracerType::BuiltInTracer(
+                    GethDebugBuiltInTracerType::CallTracer,
+                )),
+                ..Default::default()
+            },
+        )
+        .await
+        .map(|trace| {
+            trace
+                .try_into_call_frame()
+                .expect("Impossible - we requested a callframe trace so we must get it back")
+        })
+    }
+
+    fn handle_input_variable_assignment(
+        &mut self,
+        input: &Input,
+        tracing_result: &CallFrame,
+    ) -> anyhow::Result<()> {
+        let Some(ref assignments) = input.variable_assignments else {
+            return Ok(());
+        };
+
+        // Handling the return data variable assignments.
+        for (variable_name, output_word) in assignments.return_data.iter().zip(
+            tracing_result
+                .output
+                .as_ref()
+                .unwrap_or_default()
+                .to_vec()
+                .chunks(32),
+        ) {
+            let value = U256::from_be_slice(output_word);
+            self.variables.insert(variable_name.clone(), value);
+            tracing::info!(
+                variable_name,
+                variable_value = hex::encode(value.to_be_bytes::<32>()),
+                "Assigned variable"
+            );
+        }
+
+        Ok(())
+    }
+
+    async fn handle_input_expectations(
+        &mut self,
+        input: &Input,
+        execution_receipt: &TransactionReceipt,
+        resolver: &impl ResolverApi,
+        tracing_result: &CallFrame,
+    ) -> anyhow::Result<()> {
+        let span = tracing::info_span!("Handling input expectations");
+        let _guard = span.enter();
+
+        // Resolving the `input.expected` into a series of expectations that we can then assert on.
+        let mut expectations = match input {
+            Input {
+                expected: Some(Expected::Calldata(calldata)),
+                ..
+            } => vec![ExpectedOutput::new().with_calldata(calldata.clone())],
+            Input {
+                expected: Some(Expected::Expected(expected)),
+                ..
+            } => vec![expected.clone()],
+            Input {
+                expected: Some(Expected::ExpectedMany(expected)),
+                ..
+            } => expected.clone(),
+            Input { expected: None, .. } => vec![ExpectedOutput::new().with_success()],
+        };
+
+        // This is a bit of a special case and we have to support it separately on it's own. If it's
+        // a call to the deployer method, then the tests will assert that it "returns" the address
+        // of the contract. Deployments do not return the address of the contract but the runtime
+        // code of the contracts. Therefore, this assertion would always fail. So, we replace it
+        // with an assertion of "check if it succeeded"
+        if let Method::Deployer = &input.method {
+            for expectation in expectations.iter_mut() {
+                expectation.return_data = None;
+            }
+        }
+
+        for expectation in expectations.iter() {
+            self.handle_input_expectation_item(
+                execution_receipt,
+                resolver,
+                expectation,
+                tracing_result,
+            )
+            .await?;
+        }
+
+        Ok(())
+    }
+
+    async fn handle_input_expectation_item(
+        &mut self,
+        execution_receipt: &TransactionReceipt,
+        resolver: &impl ResolverApi,
+        expectation: &ExpectedOutput,
+        tracing_result: &CallFrame,
+    ) -> anyhow::Result<()> {
+        if let Some(ref version_requirement) = expectation.compiler_version {
+            if !version_requirement.matches(&self.compiler_version) {
+                return Ok(());
+            }
+        }
+
+        let deployed_contracts = &mut self.deployed_contracts;
+        let variables = &mut self.variables;
+
+        // Handling the receipt state assertion.
+        let expected = !expectation.exception;
+        let actual = execution_receipt.status();
+        if actual != expected {
+            tracing::error!(
+                expected,
+                actual,
+                ?execution_receipt,
+                ?tracing_result,
+                "Transaction status assertion failed"
+            );
+            anyhow::bail!(
+                "Transaction status assertion failed - Expected {expected} but got {actual}",
+            );
+        }
+
+        // Handling the calldata assertion
+        if let Some(ref expected_calldata) = expectation.return_data {
+            let expected = expected_calldata;
+            let actual = &tracing_result.output.as_ref().unwrap_or_default();
+            if !expected
+                .is_equivalent(actual, deployed_contracts, &*variables, resolver)
+                .await?
+            {
+                tracing::error!(
+                    ?execution_receipt,
+                    ?expected,
+                    %actual,
+                    "Calldata assertion failed"
+                );
+                anyhow::bail!("Calldata assertion failed - Expected {expected:?} but got {actual}",);
+            }
+        }
+
+        // Handling the events assertion
+        if let Some(ref expected_events) = expectation.events {
+            // Handling the events length assertion.
+            let expected = expected_events.len();
+            let actual = execution_receipt.logs().len();
+            if actual != expected {
+                tracing::error!(expected, actual, "Event count assertion failed",);
+                anyhow::bail!(
+                    "Event count assertion failed - Expected {expected} but got {actual}",
+                );
+            }
+
+            // Handling the events assertion.
+            for (event_idx, (expected_event, actual_event)) in expected_events
+                .iter()
+                .zip(execution_receipt.logs())
+                .enumerate()
+            {
+                // Handling the emitter assertion.
+                if let Some(ref expected_address) = expected_event.address {
+                    let expected = Address::from_slice(
+                        Calldata::new_compound([expected_address])
+                            .calldata(deployed_contracts, &*variables, resolver)
+                            .await?
+                            .get(12..32)
+                            .expect("Can't fail"),
+                    );
+                    let actual = actual_event.address();
+                    if actual != expected {
+                        tracing::error!(
+                            event_idx,
+                            %expected,
+                            %actual,
+                            "Event emitter assertion failed",
+                        );
+                        anyhow::bail!(
+                            "Event emitter assertion failed - Expected {expected} but got {actual}",
+                        );
+                    }
+                }
+
+                // Handling the topics assertion.
+                for (expected, actual) in expected_event
+                    .topics
+                    .as_slice()
+                    .iter()
+                    .zip(actual_event.topics())
+                {
+                    let expected = Calldata::new_compound([expected]);
+                    if !expected
+                        .is_equivalent(&actual.0, deployed_contracts, &*variables, resolver)
+                        .await?
+                    {
+                        tracing::error!(
+                            event_idx,
+                            ?execution_receipt,
+                            ?expected,
+                            ?actual,
+                            "Event topics assertion failed",
+                        );
+                        anyhow::bail!(
+                            "Event topics assertion failed - Expected {expected:?} but got {actual:?}",
+                        );
+                    }
+                }
+
+                // Handling the values assertion.
+                let expected = &expected_event.values;
+                let actual = &actual_event.data().data;
+                if !expected
+                    .is_equivalent(&actual.0, deployed_contracts, &*variables, resolver)
+                    .await?
+                {
+                    tracing::error!(
+                        event_idx,
+                        ?execution_receipt,
+                        ?expected,
+                        ?actual,
+                        "Event value assertion failed",
+                    );
+                    anyhow::bail!(
+                        "Event value assertion failed - Expected {expected:?} but got {actual:?}",
+                    );
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    async fn handle_input_diff(
+        &mut self,
+        _: CaseIdx,
+        execution_receipt: TransactionReceipt,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<(TransactionReceipt, GethTrace, DiffMode)> {
+        let span = tracing::info_span!("Handling input diff");
+        let _guard = span.enter();
+
+        let trace_options = GethDebugTracingOptions::prestate_tracer(PreStateConfig {
+            diff_mode: Some(true),
+            disable_code: None,
+            disable_storage: None,
+        });
+
+        let trace = node
+            .trace_transaction(&execution_receipt, trace_options)
+            .await?;
+        let diff = node.state_diff(&execution_receipt).await?;
+
+        Ok((execution_receipt, trace, diff))
+    }
+
+    /// Gets the information of a deployed contract or library from the state. If it's found to not
+    /// be deployed then it will be deployed.
+    ///
+    /// If a [`CaseIdx`] is not specified then this contact instance address will be stored in the
+    /// cross-case deployed contracts address mapping.
+    #[allow(clippy::too_many_arguments)]
+    pub async fn get_or_deploy_contract_instance(
+        &mut self,
+        contract_instance: &ContractInstance,
+        metadata: &Metadata,
+        deployer: Address,
+        calldata: Option<&Calldata>,
+        value: Option<EtherValue>,
+        node: &T::Blockchain,
+    ) -> anyhow::Result<(Address, JsonAbi, Option<TransactionReceipt>)> {
+        if let Some((address, abi)) = self.deployed_contracts.get(contract_instance) {
+            return Ok((*address, abi.clone(), None));
+        }
+
+        let Some(ContractPathAndIdent {
+            contract_source_path,
+            contract_ident,
+        }) = metadata.contract_sources()?.remove(contract_instance)
+        else {
+            tracing::error!("Contract source not found for instance");
+            anyhow::bail!(
+                "Contract source not found for instance {:?}",
+                contract_instance
+            )
+        };
+
+        let Some((code, abi)) = self
+            .compiled_contracts
+            .get(&contract_source_path)
+            .and_then(|source_file_contracts| source_file_contracts.get(contract_ident.as_ref()))
+            .cloned()
+        else {
+            tracing::error!(
+                contract_source_path = contract_source_path.display().to_string(),
+                contract_ident = contract_ident.as_ref(),
+                "Failed to find information for contract"
+            );
+            anyhow::bail!(
+                "Failed to find information for contract {:?}",
+                contract_instance
+            )
+        };
+
+        let mut code = match alloy::hex::decode(&code) {
+            Ok(code) => code,
+            Err(error) => {
+                tracing::error!(
+                    ?error,
+                    contract_source_path = contract_source_path.display().to_string(),
+                    contract_ident = contract_ident.as_ref(),
+                    "Failed to hex-decode byte code - This could possibly mean that the bytecode requires linking"
+                );
+                anyhow::bail!("Failed to hex-decode the byte code {}", error)
+            }
+        };
+
+        if let Some(calldata) = calldata {
+            let calldata = calldata
+                .calldata(&self.deployed_contracts, None, node)
+                .await?;
+            code.extend(calldata);
+        }
+
+        let tx = {
+            let tx = TransactionRequest::default().from(deployer);
+            let tx = match value {
+                Some(ref value) => tx.value(value.into_inner()),
+                _ => tx,
+            };
+            TransactionBuilder::<Ethereum>::with_deploy_code(tx, code)
+        };
+
+        let receipt = match node.execute_transaction(tx).await {
+            Ok(receipt) => receipt,
+            Err(error) => {
+                tracing::error!(
+                    node = std::any::type_name::<T>(),
+                    ?error,
+                    "Contract deployment transaction failed."
+                );
+                return Err(error);
+            }
+        };
+
+        let Some(address) = receipt.contract_address else {
+            tracing::error!("Contract deployment transaction didn't return an address");
+            anyhow::bail!("Contract deployment didn't return an address");
+        };
+        tracing::info!(
+            instance_name = ?contract_instance,
+            instance_address = ?address,
+            "Deployed contract"
+        );
+
+        self.deployed_contracts
+            .insert(contract_instance.clone(), (address, abi.clone()));
+
+        Ok((address, abi, Some(receipt)))
+    }
+}
+
+pub struct CaseDriver<'a, Leader: Platform, Follower: Platform> {
+    metadata: &'a Metadata,
+    case: &'a Case,
+    case_idx: CaseIdx,
+    leader_node: &'a Leader::Blockchain,
+    follower_node: &'a Follower::Blockchain,
+    leader_state: CaseState<Leader>,
+    follower_state: CaseState<Follower>,
+}
+
+impl<'a, L, F> CaseDriver<'a, L, F>
+where
+    L: Platform,
+    F: Platform,
+{
+    #[allow(clippy::too_many_arguments)]
+    pub fn new(
+        metadata: &'a Metadata,
+        case: &'a Case,
+        case_idx: impl Into<CaseIdx>,
+        leader_node: &'a L::Blockchain,
+        follower_node: &'a F::Blockchain,
+        leader_state: CaseState<L>,
+        follower_state: CaseState<F>,
+    ) -> CaseDriver<'a, L, F> {
+        Self {
+            metadata,
+            case,
+            case_idx: case_idx.into(),
+            leader_node,
+            follower_node,
+            leader_state,
+            follower_state,
+        }
+    }
+
+    pub fn trace_diff_mode(label: &str, diff: &DiffMode) {
+        tracing::trace!("{label} - PRE STATE:");
+        for (addr, state) in &diff.pre {
+            Self::trace_account_state("  [pre]", addr, state);
+        }
+
+        tracing::trace!("{label} - POST STATE:");
+        for (addr, state) in &diff.post {
+            Self::trace_account_state("  [post]", addr, state);
+        }
+    }
+
+    fn trace_account_state(prefix: &str, addr: &Address, state: &AccountState) {
+        tracing::trace!("{prefix} 0x{addr:x}");
+
+        if let Some(balance) = &state.balance {
+            tracing::trace!("{prefix}   balance: {balance}");
+        }
+        if let Some(nonce) = &state.nonce {
+            tracing::trace!("{prefix}   nonce: {nonce}");
+        }
+        if let Some(code) = &state.code {
+            tracing::trace!("{prefix}   code: {code}");
+        }
+    }
+
+    pub async fn execute(&mut self) -> anyhow::Result<usize> {
+        if !self
+            .leader_node
+            .matches_target(self.metadata.targets.as_deref())
+            || !self
+                .follower_node
+                .matches_target(self.metadata.targets.as_deref())
+        {
+            tracing::warn!(
+                targets = ?self.metadata.targets,
+                "Either the leader or follower node do not support the targets of the file"
+            );
+            return Ok(0);
+        }
+
+        let mut inputs_executed = 0;
+        for (input_idx, input) in self.case.inputs_iterator().enumerate() {
+            let tracing_span = tracing::info_span!("Handling input", input_idx);
+
+            let (leader_receipt, _, leader_diff) = self
+                .leader_state
+                .handle_input(self.metadata, self.case_idx, &input, self.leader_node)
+                .instrument(tracing_span.clone())
+                .await?;
+            let (follower_receipt, _, follower_diff) = self
+                .follower_state
+                .handle_input(self.metadata, self.case_idx, &input, self.follower_node)
+                .instrument(tracing_span)
+                .await?;
+
+            if leader_diff == follower_diff {
+                tracing::debug!("State diffs match between leader and follower.");
+            } else {
+                tracing::debug!("State diffs mismatch between leader and follower.");
+                Self::trace_diff_mode("Leader", &leader_diff);
+                Self::trace_diff_mode("Follower", &follower_diff);
+            }
+
+            if leader_receipt.logs() != follower_receipt.logs() {
+                tracing::debug!("Log/event mismatch between leader and follower.");
+                tracing::trace!("Leader logs: {:?}", leader_receipt.logs());
+                tracing::trace!("Follower logs: {:?}", follower_receipt.logs());
+            }
+
+            inputs_executed += 1;
+        }
+
+        Ok(inputs_executed)
+    }
+}
+
+pub struct BlockPinnedResolver<'a, T: Platform> {
+    block_number: BlockNumber,
+    node: &'a T::Blockchain,
+}
+
+impl<'a, T: Platform> ResolverApi for BlockPinnedResolver<'a, T> {
+    async fn chain_id(&self) -> anyhow::Result<alloy::primitives::ChainId> {
+        self.node.chain_id().await
+    }
+
+    async fn block_gas_limit(&self, number: BlockNumberOrTag) -> anyhow::Result<u128> {
+        self.node
+            .block_gas_limit(self.resolve_block_number_or_tag(number))
+            .await
+    }
+
+    async fn block_coinbase(&self, number: BlockNumberOrTag) -> anyhow::Result<Address> {
+        self.node
+            .block_coinbase(self.resolve_block_number_or_tag(number))
+            .await
+    }
+
+    async fn block_difficulty(&self, number: BlockNumberOrTag) -> anyhow::Result<U256> {
+        self.node
+            .block_difficulty(self.resolve_block_number_or_tag(number))
+            .await
+    }
+
+    async fn block_hash(
+        &self,
+        number: BlockNumberOrTag,
+    ) -> anyhow::Result<alloy::primitives::BlockHash> {
+        self.node
+            .block_hash(self.resolve_block_number_or_tag(number))
+            .await
+    }
+
+    async fn block_timestamp(
+        &self,
+        number: BlockNumberOrTag,
+    ) -> anyhow::Result<alloy::primitives::BlockTimestamp> {
+        self.node
+            .block_timestamp(self.resolve_block_number_or_tag(number))
+            .await
+    }
+
+    async fn last_block_number(&self) -> anyhow::Result<alloy::primitives::BlockNumber> {
+        Ok(self.block_number)
+    }
+}
+
+impl<'a, T: Platform> BlockPinnedResolver<'a, T> {
+    fn resolve_block_number_or_tag(&self, number: BlockNumberOrTag) -> BlockNumberOrTag {
+        match number {
+            BlockNumberOrTag::Latest => BlockNumberOrTag::Number(self.block_number),
+            n @ BlockNumberOrTag::Finalized
+            | n @ BlockNumberOrTag::Safe
+            | n @ BlockNumberOrTag::Earliest
+            | n @ BlockNumberOrTag::Pending
+            | n @ BlockNumberOrTag::Number(_) => n,
+        }
+    }
+}

crates/core/src/lib.rs

@@ -0,0 +1,47 @@
+//! The revive differential testing core library.
+//!
+//! This crate defines the testing configuration and
+//! provides a helper utility to execute tests.
+
+use revive_dt_compiler::{SolidityCompiler, revive_resolc, solc};
+use revive_dt_config::TestingPlatform;
+use revive_dt_format::traits::ResolverApi;
+use revive_dt_node::{Node, geth, kitchensink::KitchensinkNode};
+use revive_dt_node_interaction::EthereumNode;
+
+pub mod driver;
+
+/// One platform can be tested differentially against another.
+///
+/// For this we need a blockchain node implementation and a compiler.
+pub trait Platform {
+    type Blockchain: EthereumNode + Node + ResolverApi;
+    type Compiler: SolidityCompiler;
+
+    /// Returns the matching [TestingPlatform] of the [revive_dt_config::Arguments].
+    fn config_id() -> TestingPlatform;
+}
+
+#[derive(Default)]
+pub struct Geth;
+
+impl Platform for Geth {
+    type Blockchain = geth::GethNode;
+    type Compiler = solc::Solc;
+
+    fn config_id() -> TestingPlatform {
+        TestingPlatform::Geth
+    }
+}
+
+#[derive(Default)]
+pub struct Kitchensink;
+
+impl Platform for Kitchensink {
+    type Blockchain = KitchensinkNode;
+    type Compiler = revive_resolc::Resolc;
+
+    fn config_id() -> TestingPlatform {
+        TestingPlatform::Kitchensink
+    }
+}

crates/core/src/main.rs

@@ -0,0 +1,744 @@
+use std::{
+    collections::HashMap,
+    path::Path,
+    sync::{Arc, LazyLock},
+};
+
+use alloy::{
+    json_abi::JsonAbi,
+    network::{Ethereum, TransactionBuilder},
+    primitives::Address,
+    rpc::types::TransactionRequest,
+};
+use anyhow::Context;
+use clap::Parser;
+use futures::StreamExt;
+use revive_dt_common::iterators::FilesWithExtensionIterator;
+use revive_dt_node_interaction::EthereumNode;
+use semver::Version;
+use temp_dir::TempDir;
+use tokio::sync::{Mutex, RwLock};
+use tracing::{Instrument, Level};
+use tracing_subscriber::{EnvFilter, FmtSubscriber};
+
+use revive_dt_compiler::SolidityCompiler;
+use revive_dt_compiler::{Compiler, CompilerOutput};
+use revive_dt_config::*;
+use revive_dt_core::{
+    Geth, Kitchensink, Platform,
+    driver::{CaseDriver, CaseState},
+};
+use revive_dt_format::{
+    case::{Case, CaseIdx},
+    corpus::Corpus,
+    input::Input,
+    metadata::{ContractInstance, ContractPathAndIdent, Metadata, MetadataFile},
+    mode::SolcMode,
+};
+use revive_dt_node::pool::NodePool;
+use revive_dt_report::reporter::{Report, Span};
+
+static TEMP_DIR: LazyLock<TempDir> = LazyLock::new(|| TempDir::new().unwrap());
+
+type CompilationCache<'a> = Arc<
+    RwLock<
+        HashMap<
+            (&'a Path, SolcMode, TestingPlatform),
+            Arc<Mutex<Option<Arc<(Version, CompilerOutput)>>>>,
+        >,
+    >,
+>;
+
+fn main() -> anyhow::Result<()> {
+    let args = init_cli()?;
+
+    let body = async {
+        for (corpus, tests) in collect_corpora(&args)? {
+            let span = Span::new(corpus, args.clone())?;
+            match &args.compile_only {
+                Some(platform) => compile_corpus(&args, &tests, platform, span).await,
+                None => execute_corpus(&args, &tests, span).await?,
+            }
+            Report::save()?;
+        }
+        Ok(())
+    };
+
+    tokio::runtime::Builder::new_multi_thread()
+        .worker_threads(args.number_of_threads)
+        .enable_all()
+        .build()
+        .expect("Failed building the Runtime")
+        .block_on(body)
+}
+
+fn init_cli() -> anyhow::Result<Arguments> {
+    let subscriber = FmtSubscriber::builder()
+        .with_thread_ids(true)
+        .with_thread_names(true)
+        .with_env_filter(EnvFilter::from_default_env())
+        .with_ansi(false)
+        .pretty()
+        .finish();
+    tracing::subscriber::set_global_default(subscriber)?;
+
+    let mut args = Arguments::parse();
+
+    if args.corpus.is_empty() {
+        anyhow::bail!("no test corpus specified");
+    }
+
+    match args.working_directory.as_ref() {
+        Some(dir) => {
+            if !dir.exists() {
+                anyhow::bail!("workdir {} does not exist", dir.display());
+            }
+        }
+        None => {
+            args.temp_dir = Some(&TEMP_DIR);
+        }
+    }
+    tracing::info!("workdir: {}", args.directory().display());
+
+    Ok(args)
+}
+
+fn collect_corpora(args: &Arguments) -> anyhow::Result<HashMap<Corpus, Vec<MetadataFile>>> {
+    let mut corpora = HashMap::new();
+
+    for path in &args.corpus {
+        let corpus = Corpus::try_from_path(path)?;
+        tracing::info!("found corpus: {}", path.display());
+        let tests = corpus.enumerate_tests();
+        tracing::info!("corpus '{}' contains {} tests", &corpus.name, tests.len());
+        corpora.insert(corpus, tests);
+    }
+
+    Ok(corpora)
+}
+
+async fn run_driver<L, F>(
+    args: &Arguments,
+    tests: &[MetadataFile],
+    span: Span,
+) -> anyhow::Result<()>
+where
+    L: Platform,
+    F: Platform,
+    L::Blockchain: revive_dt_node::Node + Send + Sync + 'static,
+    F::Blockchain: revive_dt_node::Node + Send + Sync + 'static,
+{
+    let leader_nodes = NodePool::<L::Blockchain>::new(args)?;
+    let follower_nodes = NodePool::<F::Blockchain>::new(args)?;
+
+    let test_cases = tests
+        .iter()
+        .flat_map(
+            |MetadataFile {
+                 path,
+                 content: metadata,
+             }| {
+                metadata
+                    .cases
+                    .iter()
+                    .enumerate()
+                    .flat_map(move |(case_idx, case)| {
+                        metadata
+                            .solc_modes()
+                            .into_iter()
+                            .map(move |solc_mode| (path, metadata, case_idx, case, solc_mode))
+                    })
+            },
+        )
+        .filter(
+            |(metadata_file_path, metadata, _, _, _)| match metadata.ignore {
+                Some(true) => {
+                    tracing::warn!(
+                        metadata_file_path = %metadata_file_path.display(),
+                        "Ignoring metadata file"
+                    );
+                    false
+                }
+                Some(false) | None => true,
+            },
+        )
+        .filter(
+            |(metadata_file_path, _, case_idx, case, _)| match case.ignore {
+                Some(true) => {
+                    tracing::warn!(
+                        metadata_file_path = %metadata_file_path.display(),
+                        case_idx,
+                        case_name = ?case.name,
+                        "Ignoring case"
+                    );
+                    false
+                }
+                Some(false) | None => true,
+            },
+        )
+        .collect::<Vec<_>>();
+
+    let metadata_case_status = Arc::new(RwLock::new(test_cases.iter().fold(
+        HashMap::<_, HashMap<_, _>>::new(),
+        |mut map, (path, _, case_idx, case, solc_mode)| {
+            map.entry((path.to_path_buf(), solc_mode.clone()))
+                .or_default()
+                .insert((CaseIdx::new(*case_idx), case.name.clone()), None::<bool>);
+            map
+        },
+    )));
+    let status_reporter_task = {
+        let metadata_case_status = metadata_case_status.clone();
+        async move {
+            const GREEN: &str = "\x1B[32m";
+            const RED: &str = "\x1B[31m";
+            const RESET: &str = "\x1B[0m";
+
+            let mut entries_to_delete = Vec::new();
+            let mut number_of_successes = 0;
+            let mut number_of_failures = 0;
+            loop {
+                let metadata_case_status_read = metadata_case_status.read().await;
+                if metadata_case_status_read.is_empty() {
+                    break;
+                }
+
+                for ((metadata_file_path, solc_mode), case_status) in
+                    metadata_case_status_read.iter()
+                {
+                    if case_status.values().any(|value| value.is_none()) {
+                        continue;
+                    }
+
+                    let contains_failures = case_status
+                        .values()
+                        .any(|value| value.is_some_and(|value| !value));
+
+                    if !contains_failures {
+                        eprintln!(
+                            "{}Succeeded:{} {} - {:?}",
+                            GREEN,
+                            RESET,
+                            metadata_file_path.display(),
+                            solc_mode
+                        )
+                    } else {
+                        eprintln!(
+                            "{}Failed:{} {} - {:?}",
+                            RED,
+                            RESET,
+                            metadata_file_path.display(),
+                            solc_mode
+                        )
+                    };
+
+                    number_of_successes += case_status
+                        .values()
+                        .filter(|value| value.is_some_and(|value| value))
+                        .count();
+                    number_of_failures += case_status
+                        .values()
+                        .filter(|value| value.is_some_and(|value| !value))
+                        .count();
+
+                    let mut case_status = case_status
+                        .iter()
+                        .map(|((case_idx, case_name), case_status)| {
+                            (case_idx.into_inner(), case_name, case_status.unwrap())
+                        })
+                        .collect::<Vec<_>>();
+                    case_status.sort_by(|a, b| a.0.cmp(&b.0));
+                    for (case_idx, case_name, case_status) in case_status.into_iter() {
+                        if case_status {
+                            eprintln!(
+                                "  {GREEN}Case Succeeded:{RESET} {} - Case Idx: {case_idx}",
+                                case_name
+                                    .as_ref()
+                                    .map(|string| string.as_str())
+                                    .unwrap_or("Unnamed case")
+                            )
+                        } else {
+                            eprintln!(
+                                "  {RED}Case Failed:{RESET} {} - Case Idx: {case_idx}",
+                                case_name
+                                    .as_ref()
+                                    .map(|string| string.as_str())
+                                    .unwrap_or("Unnamed case")
+                            )
+                        };
+                    }
+                    eprintln!();
+
+                    entries_to_delete.push((metadata_file_path.clone(), solc_mode.clone()));
+                }
+
+                drop(metadata_case_status_read);
+                let mut metadata_case_status_write = metadata_case_status.write().await;
+                for entry in entries_to_delete.drain(..) {
+                    metadata_case_status_write.remove(&entry);
+                }
+
+                tokio::time::sleep(std::time::Duration::from_secs(3)).await;
+            }
+
+            eprintln!(
+                "{GREEN}{number_of_successes}{RESET} cases succeeded, {RED}{number_of_failures}{RESET} cases failed"
+            );
+        }
+    };
+
+    let compilation_cache = Arc::new(RwLock::new(HashMap::new()));
+    let driver_task = futures::stream::iter(test_cases).for_each_concurrent(
+        None,
+        |(metadata_file_path, metadata, case_idx, case, solc_mode)| {
+            let compilation_cache = compilation_cache.clone();
+            let leader_node = leader_nodes.round_robbin();
+            let follower_node = follower_nodes.round_robbin();
+            let tracing_span = tracing::span!(
+                Level::INFO,
+                "Running driver",
+                metadata_file_path = %metadata_file_path.display(),
+                case_idx = case_idx,
+                solc_mode = ?solc_mode,
+            );
+            let metadata_case_status = metadata_case_status.clone();
+            async move {
+                let result = handle_case_driver::<L, F>(
+                    metadata_file_path.as_path(),
+                    metadata,
+                    case_idx.into(),
+                    case,
+                    solc_mode.clone(),
+                    args,
+                    compilation_cache.clone(),
+                    leader_node,
+                    follower_node,
+                    span,
+                )
+                .await;
+                let mut metadata_case_status = metadata_case_status.write().await;
+                match result {
+                    Ok(inputs_executed) => {
+                        tracing::info!(inputs_executed, "Execution succeeded");
+                        metadata_case_status
+                            .entry((metadata_file_path.clone(), solc_mode))
+                            .or_default()
+                            .insert((CaseIdx::new(case_idx), case.name.clone()), Some(true));
+                    }
+                    Err(error) => {
+                        metadata_case_status
+                            .entry((metadata_file_path.clone(), solc_mode))
+                            .or_default()
+                            .insert((CaseIdx::new(case_idx), case.name.clone()), Some(false));
+                        tracing::error!(%error, "Execution failed")
+                    }
+                }
+                tracing::info!("Execution completed");
+            }
+            .instrument(tracing_span)
+        },
+    );
+
+    tokio::join!(status_reporter_task, driver_task);
+
+    Ok(())
+}
+
+#[allow(clippy::too_many_arguments)]
+async fn handle_case_driver<'a, L, F>(
+    metadata_file_path: &'a Path,
+    metadata: &'a Metadata,
+    case_idx: CaseIdx,
+    case: &Case,
+    mode: SolcMode,
+    config: &Arguments,
+    compilation_cache: CompilationCache<'a>,
+    leader_node: &L::Blockchain,
+    follower_node: &F::Blockchain,
+    _: Span,
+) -> anyhow::Result<usize>
+where
+    L: Platform,
+    F: Platform,
+    L::Blockchain: revive_dt_node::Node + Send + Sync + 'static,
+    F::Blockchain: revive_dt_node::Node + Send + Sync + 'static,
+{
+    let leader_pre_link_contracts = get_or_build_contracts::<L>(
+        metadata,
+        metadata_file_path,
+        mode.clone(),
+        config,
+        compilation_cache.clone(),
+        &HashMap::new(),
+    )
+    .await?;
+    let follower_pre_link_contracts = get_or_build_contracts::<F>(
+        metadata,
+        metadata_file_path,
+        mode.clone(),
+        config,
+        compilation_cache.clone(),
+        &HashMap::new(),
+    )
+    .await?;
+
+    let mut leader_deployed_libraries = HashMap::new();
+    let mut follower_deployed_libraries = HashMap::new();
+    let mut contract_sources = metadata.contract_sources()?;
+    for library_instance in metadata
+        .libraries
+        .iter()
+        .flatten()
+        .flat_map(|(_, map)| map.values())
+    {
+        let ContractPathAndIdent {
+            contract_source_path: library_source_path,
+            contract_ident: library_ident,
+        } = contract_sources
+            .remove(library_instance)
+            .context("Failed to find the contract source")?;
+
+        let (leader_code, leader_abi) = leader_pre_link_contracts
+            .1
+            .contracts
+            .get(&library_source_path)
+            .and_then(|contracts| contracts.get(library_ident.as_str()))
+            .context("Declared library was not compiled")?;
+        let (follower_code, follower_abi) = follower_pre_link_contracts
+            .1
+            .contracts
+            .get(&library_source_path)
+            .and_then(|contracts| contracts.get(library_ident.as_str()))
+            .context("Declared library was not compiled")?;
+
+        let leader_code = match alloy::hex::decode(leader_code) {
+            Ok(code) => code,
+            Err(error) => {
+                tracing::error!(
+                    ?error,
+                    contract_source_path = library_source_path.display().to_string(),
+                    contract_ident = library_ident.as_ref(),
+                    "Failed to hex-decode byte code - This could possibly mean that the bytecode requires linking"
+                );
+                anyhow::bail!("Failed to hex-decode the byte code {}", error)
+            }
+        };
+        let follower_code = match alloy::hex::decode(follower_code) {
+            Ok(code) => code,
+            Err(error) => {
+                tracing::error!(
+                    ?error,
+                    contract_source_path = library_source_path.display().to_string(),
+                    contract_ident = library_ident.as_ref(),
+                    "Failed to hex-decode byte code - This could possibly mean that the bytecode requires linking"
+                );
+                anyhow::bail!("Failed to hex-decode the byte code {}", error)
+            }
+        };
+
+        // Getting the deployer address from the cases themselves. This is to ensure that we're
+        // doing the deployments from different accounts and therefore we're not slowed down by
+        // the nonce.
+        let deployer_address = case
+            .inputs
+            .iter()
+            .map(|input| input.caller)
+            .next()
+            .unwrap_or(Input::default_caller());
+        let leader_tx = TransactionBuilder::<Ethereum>::with_deploy_code(
+            TransactionRequest::default().from(deployer_address),
+            leader_code,
+        );
+        let follower_tx = TransactionBuilder::<Ethereum>::with_deploy_code(
+            TransactionRequest::default().from(deployer_address),
+            follower_code,
+        );
+
+        let leader_receipt = match leader_node.execute_transaction(leader_tx).await {
+            Ok(receipt) => receipt,
+            Err(error) => {
+                tracing::error!(
+                    node = std::any::type_name::<L>(),
+                    ?error,
+                    "Contract deployment transaction failed."
+                );
+                return Err(error);
+            }
+        };
+        let follower_receipt = match follower_node.execute_transaction(follower_tx).await {
+            Ok(receipt) => receipt,
+            Err(error) => {
+                tracing::error!(
+                    node = std::any::type_name::<F>(),
+                    ?error,
+                    "Contract deployment transaction failed."
+                );
+                return Err(error);
+            }
+        };
+
+        tracing::info!(
+            ?library_instance,
+            library_address = ?leader_receipt.contract_address,
+            "Deployed library to leader"
+        );
+        tracing::info!(
+            ?library_instance,
+            library_address = ?follower_receipt.contract_address,
+            "Deployed library to follower"
+        );
+
+        let Some(leader_library_address) = leader_receipt.contract_address else {
+            tracing::error!("Contract deployment transaction didn't return an address");
+            anyhow::bail!("Contract deployment didn't return an address");
+        };
+        let Some(follower_library_address) = follower_receipt.contract_address else {
+            tracing::error!("Contract deployment transaction didn't return an address");
+            anyhow::bail!("Contract deployment didn't return an address");
+        };
+
+        leader_deployed_libraries.insert(
+            library_instance.clone(),
+            (leader_library_address, leader_abi.clone()),
+        );
+        follower_deployed_libraries.insert(
+            library_instance.clone(),
+            (follower_library_address, follower_abi.clone()),
+        );
+    }
+
+    let metadata_file_contains_libraries = metadata
+        .libraries
+        .iter()
+        .flat_map(|map| map.iter())
+        .flat_map(|(_, value)| value.iter())
+        .next()
+        .is_some();
+    let compiled_contracts_require_linking = leader_pre_link_contracts
+        .1
+        .contracts
+        .values()
+        .chain(follower_pre_link_contracts.1.contracts.values())
+        .flat_map(|value| value.values())
+        .any(|(code, _)| !code.chars().all(|char| char.is_ascii_hexdigit()));
+    let (leader_compiled_contracts, follower_compiled_contracts) =
+        if metadata_file_contains_libraries && compiled_contracts_require_linking {
+            let leader_key = (metadata_file_path, mode.clone(), L::config_id());
+            let follower_key = (metadata_file_path, mode.clone(), L::config_id());
+            {
+                let mut cache = compilation_cache.write().await;
+                cache.remove(&leader_key);
+                cache.remove(&follower_key);
+            }
+
+            let leader_post_link_contracts = get_or_build_contracts::<L>(
+                metadata,
+                metadata_file_path,
+                mode.clone(),
+                config,
+                compilation_cache.clone(),
+                &leader_deployed_libraries,
+            )
+            .await?;
+            let follower_post_link_contracts = get_or_build_contracts::<F>(
+                metadata,
+                metadata_file_path,
+                mode.clone(),
+                config,
+                compilation_cache,
+                &follower_deployed_libraries,
+            )
+            .await?;
+
+            (leader_post_link_contracts, follower_post_link_contracts)
+        } else {
+            (leader_pre_link_contracts, follower_pre_link_contracts)
+        };
+
+    let leader_state = CaseState::<L>::new(
+        leader_compiled_contracts.0.clone(),
+        leader_compiled_contracts.1.contracts.clone(),
+        leader_deployed_libraries,
+    );
+    let follower_state = CaseState::<F>::new(
+        follower_compiled_contracts.0.clone(),
+        follower_compiled_contracts.1.contracts.clone(),
+        follower_deployed_libraries,
+    );
+
+    let mut driver = CaseDriver::<L, F>::new(
+        metadata,
+        case,
+        case_idx,
+        leader_node,
+        follower_node,
+        leader_state,
+        follower_state,
+    );
+    driver.execute().await
+}
+
+async fn get_or_build_contracts<'a, P: Platform>(
+    metadata: &'a Metadata,
+    metadata_file_path: &'a Path,
+    mode: SolcMode,
+    config: &Arguments,
+    compilation_cache: CompilationCache<'a>,
+    deployed_libraries: &HashMap<ContractInstance, (Address, JsonAbi)>,
+) -> anyhow::Result<Arc<(Version, CompilerOutput)>> {
+    let key = (metadata_file_path, mode.clone(), P::config_id());
+    if let Some(compilation_artifact) = compilation_cache.read().await.get(&key).cloned() {
+        let mut compilation_artifact = compilation_artifact.lock().await;
+        match *compilation_artifact {
+            Some(ref compiled_contracts) => {
+                tracing::debug!(?key, "Compiled contracts cache hit");
+                return Ok(compiled_contracts.clone());
+            }
+            None => {
+                tracing::debug!(?key, "Compiled contracts cache miss");
+                let compiled_contracts = Arc::new(
+                    compile_contracts::<P>(
+                        metadata,
+                        metadata_file_path,
+                        &mode,
+                        config,
+                        deployed_libraries,
+                    )
+                    .await?,
+                );
+                *compilation_artifact = Some(compiled_contracts.clone());
+                return Ok(compiled_contracts.clone());
+            }
+        }
+    };
+
+    tracing::debug!(?key, "Compiled contracts cache miss");
+    let mutex = {
+        let mut compilation_cache = compilation_cache.write().await;
+        let mutex = Arc::new(Mutex::new(None));
+        compilation_cache.insert(key, mutex.clone());
+        mutex
+    };
+    let mut compilation_artifact = mutex.lock().await;
+    let compiled_contracts = Arc::new(
+        compile_contracts::<P>(
+            metadata,
+            metadata_file_path,
+            &mode,
+            config,
+            deployed_libraries,
+        )
+        .await?,
+    );
+    *compilation_artifact = Some(compiled_contracts.clone());
+    Ok(compiled_contracts.clone())
+}
+
+async fn compile_contracts<P: Platform>(
+    metadata: &Metadata,
+    metadata_file_path: &Path,
+    mode: &SolcMode,
+    config: &Arguments,
+    deployed_libraries: &HashMap<ContractInstance, (Address, JsonAbi)>,
+) -> anyhow::Result<(Version, CompilerOutput)> {
+    let compiler_version_or_requirement = mode.compiler_version_to_use(config.solc.clone());
+    let compiler_path =
+        P::Compiler::get_compiler_executable(config, compiler_version_or_requirement).await?;
+    let compiler_version = P::Compiler::new(compiler_path.clone()).version()?;
+
+    tracing::info!(
+        %compiler_version,
+        metadata_file_path = %metadata_file_path.display(),
+        mode = ?mode,
+        "Compiling contracts"
+    );
+
+    let compiler = Compiler::<P::Compiler>::new()
+        .with_allow_path(metadata.directory()?)
+        .with_optimization(mode.solc_optimize());
+    let mut compiler = metadata
+        .files_to_compile()?
+        .try_fold(compiler, |compiler, path| compiler.with_source(&path))?;
+    for (library_instance, (library_address, _)) in deployed_libraries.iter() {
+        let library_ident = &metadata
+            .contracts
+            .as_ref()
+            .and_then(|contracts| contracts.get(library_instance))
+            .expect("Impossible for library to not be found in contracts")
+            .contract_ident;
+
+        // Note the following: we need to tell solc which files require the libraries to be linked
+        // into them. We do not have access to this information and therefore we choose an easier,
+        // yet more compute intensive route, of telling solc that all of the files need to link the
+        // library and it will only perform the linking for the files that do actually need the
+        // library.
+        compiler = FilesWithExtensionIterator::new(metadata.directory()?)
+            .with_allowed_extension("sol")
+            .fold(compiler, |compiler, path| {
+                compiler.with_library(&path, library_ident.as_str(), *library_address)
+            });
+    }
+
+    let compiler_output = compiler.try_build(compiler_path).await?;
+
+    Ok((compiler_version, compiler_output))
+}
+
+async fn execute_corpus(
+    args: &Arguments,
+    tests: &[MetadataFile],
+    span: Span,
+) -> anyhow::Result<()> {
+    match (&args.leader, &args.follower) {
+        (TestingPlatform::Geth, TestingPlatform::Kitchensink) => {
+            run_driver::<Geth, Kitchensink>(args, tests, span).await?
+        }
+        (TestingPlatform::Geth, TestingPlatform::Geth) => {
+            run_driver::<Geth, Geth>(args, tests, span).await?
+        }
+        _ => unimplemented!(),
+    }
+
+    Ok(())
+}
+
+async fn compile_corpus(
+    config: &Arguments,
+    tests: &[MetadataFile],
+    platform: &TestingPlatform,
+    _: Span,
+) {
+    let tests = tests.iter().flat_map(|metadata| {
+        metadata
+            .solc_modes()
+            .into_iter()
+            .map(move |solc_mode| (metadata, solc_mode))
+    });
+
+    futures::stream::iter(tests)
+        .for_each_concurrent(None, |(metadata, mode)| async move {
+            match platform {
+                TestingPlatform::Geth => {
+                    let _ = compile_contracts::<Geth>(
+                        &metadata.content,
+                        &metadata.path,
+                        &mode,
+                        config,
+                        &Default::default(),
+                    )
+                    .await;
+                }
+                TestingPlatform::Kitchensink => {
+                    let _ = compile_contracts::<Geth>(
+                        &metadata.content,
+                        &metadata.path,
+                        &mode,
+                        config,
+                        &Default::default(),
+                    )
+                    .await;
+                }
+            }
+        })
+        .await;
+}

crates/format/Cargo.toml

@@ -0,0 +1,24 @@
+[package]
+name = "revive-dt-format"
+description = "declarative test definition format"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+revive-dt-common = { workspace = true }
+
+alloy = { workspace = true }
+alloy-primitives = { workspace = true }
+alloy-sol-types = { workspace = true }
+anyhow = { workspace = true }
+tracing = { workspace = true }
+semver = { workspace = true }
+serde = { workspace = true, features = ["derive"] }
+serde_json = { workspace = true }
+
+[dev-dependencies]
+tokio = { workspace = true }

crates/format/src/case.rs

@@ -0,0 +1,51 @@
+use serde::Deserialize;
+
+use revive_dt_common::macros::define_wrapper_type;
+
+use crate::{
+    input::{Expected, Input},
+    mode::Mode,
+};
+
+#[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
+pub struct Case {
+    pub name: Option<String>,
+    pub comment: Option<String>,
+    pub modes: Option<Vec<Mode>>,
+    pub inputs: Vec<Input>,
+    pub group: Option<String>,
+    pub expected: Option<Expected>,
+    pub ignore: Option<bool>,
+}
+
+impl Case {
+    pub fn inputs_iterator(&self) -> impl Iterator<Item = Input> {
+        let inputs_len = self.inputs.len();
+        self.inputs
+            .clone()
+            .into_iter()
+            .enumerate()
+            .map(move |(idx, mut input)| {
+                if idx + 1 == inputs_len {
+                    if input.expected.is_none() {
+                        input.expected = self.expected.clone();
+                    }
+
+                    // TODO: What does it mean for us to have an `expected` field on the case itself
+                    // but the final input also has an expected field that doesn't match the one on
+                    // the case? What are we supposed to do with that final expected field on the
+                    // case?
+
+                    input
+                } else {
+                    input
+                }
+            })
+    }
+}
+
+define_wrapper_type!(
+    /// A wrapper type for the index of test cases found in metadata file.
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    pub struct CaseIdx(usize);
+);

crates/format/src/corpus.rs

@@ -0,0 +1,99 @@
+use std::{
+    fs::File,
+    path::{Path, PathBuf},
+};
+
+use serde::{Deserialize, Serialize};
+
+use crate::metadata::MetadataFile;
+
+#[derive(Clone, Debug, Default, Serialize, Deserialize, Eq, PartialEq, Hash)]
+pub struct Corpus {
+    pub name: String,
+    pub path: PathBuf,
+}
+
+impl Corpus {
+    /// Try to read and parse the corpus definition file at given `path`.
+    pub fn try_from_path(path: &Path) -> anyhow::Result<Self> {
+        let file = File::open(path)?;
+        let mut corpus: Corpus = serde_json::from_reader(file)?;
+
+        // Ensure that the path mentioned in the corpus is relative to the corpus file.
+        // Canonicalizing also helps make the path in any errors unambiguous.
+        corpus.path = path
+            .parent()
+            .ok_or_else(|| {
+                anyhow::anyhow!("Corpus path '{}' does not point to a file", path.display())
+            })?
+            .canonicalize()
+            .map_err(|error| {
+                anyhow::anyhow!(
+                    "Failed to canonicalize path to corpus '{}': {error}",
+                    path.display()
+                )
+            })?
+            .join(corpus.path);
+
+        Ok(corpus)
+    }
+
+    /// Scan the corpus base directory and return all tests found.
+    pub fn enumerate_tests(&self) -> Vec<MetadataFile> {
+        let mut tests = Vec::new();
+        collect_metadata(&self.path, &mut tests);
+        tests
+    }
+}
+
+/// Recursively walks `path` and parses any JSON or Solidity file into a test
+/// definition [Metadata].
+///
+/// Found tests are inserted into `tests`.
+///
+/// `path` is expected to be a directory.
+pub fn collect_metadata(path: &Path, tests: &mut Vec<MetadataFile>) {
+    if path.is_dir() {
+        let dir_entry = match std::fs::read_dir(path) {
+            Ok(dir_entry) => dir_entry,
+            Err(error) => {
+                tracing::error!("failed to read dir '{}': {error}", path.display());
+                return;
+            }
+        };
+
+        for entry in dir_entry {
+            let entry = match entry {
+                Ok(entry) => entry,
+                Err(error) => {
+                    tracing::error!("error reading dir entry: {error}");
+                    continue;
+                }
+            };
+
+            let path = entry.path();
+            if path.is_dir() {
+                collect_metadata(&path, tests);
+                continue;
+            }
+
+            if path.is_file() {
+                if let Some(metadata) = MetadataFile::try_from_file(&path) {
+                    tests.push(metadata)
+                }
+            }
+        }
+    } else {
+        let Some(extension) = path.extension() else {
+            tracing::error!("Failed to get file extension");
+            return;
+        };
+        if extension.eq_ignore_ascii_case("sol") || extension.eq_ignore_ascii_case("json") {
+            if let Some(metadata) = MetadataFile::try_from_file(path) {
+                tests.push(metadata)
+            }
+        } else {
+            tracing::error!(?extension, "Unsupported file extension");
+        }
+    }
+}

crates/format/src/lib.rs

@@ -0,0 +1,8 @@
+//! The revive differential tests case format.
+
+pub mod case;
+pub mod corpus;
+pub mod input;
+pub mod metadata;
+pub mod mode;
+pub mod traits;

crates/format/src/metadata.rs

@@ -0,0 +1,384 @@
+use std::{
+    collections::BTreeMap,
+    fmt::Display,
+    fs::{File, read_to_string},
+    ops::Deref,
+    path::{Path, PathBuf},
+    str::FromStr,
+};
+
+use serde::{Deserialize, Serialize};
+
+use revive_dt_common::{iterators::FilesWithExtensionIterator, macros::define_wrapper_type};
+
+use crate::{
+    case::Case,
+    mode::{Mode, SolcMode},
+};
+
+pub const METADATA_FILE_EXTENSION: &str = "json";
+pub const SOLIDITY_CASE_FILE_EXTENSION: &str = "sol";
+pub const SOLIDITY_CASE_COMMENT_MARKER: &str = "//!";
+
+#[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
+pub struct MetadataFile {
+    pub path: PathBuf,
+    pub content: Metadata,
+}
+
+impl MetadataFile {
+    pub fn try_from_file(path: &Path) -> Option<Self> {
+        Metadata::try_from_file(path).map(|metadata| Self {
+            path: path.to_owned(),
+            content: metadata,
+        })
+    }
+}
+
+impl Deref for MetadataFile {
+    type Target = Metadata;
+
+    fn deref(&self) -> &Self::Target {
+        &self.content
+    }
+}
+
+#[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
+pub struct Metadata {
+    pub targets: Option<Vec<String>>,
+    pub cases: Vec<Case>,
+    pub contracts: Option<BTreeMap<ContractInstance, ContractPathAndIdent>>,
+    // TODO: Convert into wrapper types for clarity.
+    pub libraries: Option<BTreeMap<PathBuf, BTreeMap<ContractIdent, ContractInstance>>>,
+    pub ignore: Option<bool>,
+    pub modes: Option<Vec<Mode>>,
+    pub file_path: Option<PathBuf>,
+}
+
+impl Metadata {
+    /// Returns the solc modes of this metadata, inserting a default mode if not present.
+    pub fn solc_modes(&self) -> Vec<SolcMode> {
+        self.modes
+            .to_owned()
+            .unwrap_or_else(|| vec![Mode::Solidity(Default::default())])
+            .iter()
+            .filter_map(|mode| match mode {
+                Mode::Solidity(solc_mode) => Some(solc_mode),
+                Mode::Unknown(mode) => {
+                    tracing::debug!("compiler: ignoring unknown mode '{mode}'");
+                    None
+                }
+            })
+            .cloned()
+            .collect()
+    }
+
+    /// Returns the base directory of this metadata.
+    pub fn directory(&self) -> anyhow::Result<PathBuf> {
+        Ok(self
+            .file_path
+            .as_ref()
+            .and_then(|path| path.parent())
+            .ok_or_else(|| anyhow::anyhow!("metadata invalid file path: {:?}", self.file_path))?
+            .to_path_buf())
+    }
+
+    /// Returns the contract sources with canonicalized paths for the files
+    pub fn contract_sources(
+        &self,
+    ) -> anyhow::Result<BTreeMap<ContractInstance, ContractPathAndIdent>> {
+        let directory = self.directory()?;
+        let mut sources = BTreeMap::new();
+        let Some(contracts) = &self.contracts else {
+            return Ok(sources);
+        };
+
+        for (
+            alias,
+            ContractPathAndIdent {
+                contract_source_path,
+                contract_ident,
+            },
+        ) in contracts
+        {
+            let alias = alias.clone();
+            let absolute_path = directory.join(contract_source_path).canonicalize()?;
+            let contract_ident = contract_ident.clone();
+
+            sources.insert(
+                alias,
+                ContractPathAndIdent {
+                    contract_source_path: absolute_path,
+                    contract_ident,
+                },
+            );
+        }
+
+        Ok(sources)
+    }
+
+    /// Try to parse the test metadata struct from the given file at `path`.
+    ///
+    /// Returns `None` if `path` didn't contain a test metadata or case definition.
+    ///
+    /// # Panics
+    /// Expects the supplied `path` to be a file.
+    pub fn try_from_file(path: &Path) -> Option<Self> {
+        assert!(path.is_file(), "not a file: {}", path.display());
+
+        let Some(file_extension) = path.extension() else {
+            tracing::debug!("skipping corpus file: {}", path.display());
+            return None;
+        };
+
+        if file_extension == METADATA_FILE_EXTENSION {
+            return Self::try_from_json(path);
+        }
+
+        if file_extension == SOLIDITY_CASE_FILE_EXTENSION {
+            return Self::try_from_solidity(path);
+        }
+
+        tracing::debug!("ignoring invalid corpus file: {}", path.display());
+        None
+    }
+
+    fn try_from_json(path: &Path) -> Option<Self> {
+        let file = File::open(path)
+            .inspect_err(|error| {
+                tracing::error!(
+                    "opening JSON test metadata file '{}' error: {error}",
+                    path.display()
+                );
+            })
+            .ok()?;
+
+        match serde_json::from_reader::<_, Metadata>(file) {
+            Ok(mut metadata) => {
+                metadata.file_path = Some(path.to_path_buf());
+                Some(metadata)
+            }
+            Err(error) => {
+                tracing::error!(
+                    "parsing JSON test metadata file '{}' error: {error}",
+                    path.display()
+                );
+                None
+            }
+        }
+    }
+
+    fn try_from_solidity(path: &Path) -> Option<Self> {
+        let spec = read_to_string(path)
+            .inspect_err(|error| {
+                tracing::error!(
+                    "opening JSON test metadata file '{}' error: {error}",
+                    path.display()
+                );
+            })
+            .ok()?
+            .lines()
+            .filter_map(|line| line.strip_prefix(SOLIDITY_CASE_COMMENT_MARKER))
+            .fold(String::new(), |mut buf, string| {
+                buf.push_str(string);
+                buf
+            });
+
+        if spec.is_empty() {
+            return None;
+        }
+
+        match serde_json::from_str::<Self>(&spec) {
+            Ok(mut metadata) => {
+                metadata.file_path = Some(path.to_path_buf());
+                metadata.contracts = Some(
+                    [(
+                        ContractInstance::new("Test"),
+                        ContractPathAndIdent {
+                            contract_source_path: path.to_path_buf(),
+                            contract_ident: ContractIdent::new("Test"),
+                        },
+                    )]
+                    .into(),
+                );
+                Some(metadata)
+            }
+            Err(error) => {
+                tracing::error!(
+                    "parsing Solidity test metadata file '{}' error: '{error}' from data: {spec}",
+                    path.display()
+                );
+                None
+            }
+        }
+    }
+
+    /// Returns an iterator over all of the solidity files that needs to be compiled for this
+    /// [`Metadata`] object
+    ///
+    /// Note: if the metadata is contained within a solidity file then this is the only file that
+    /// we wish to compile since this is a self-contained test. Otherwise, if it's a JSON file
+    /// then we need to compile all of the contracts that are in the directory since imports are
+    /// allowed in there.
+    pub fn files_to_compile(&self) -> anyhow::Result<Box<dyn Iterator<Item = PathBuf>>> {
+        let Some(ref metadata_file_path) = self.file_path else {
+            anyhow::bail!("The metadata file path is not defined");
+        };
+        if metadata_file_path
+            .extension()
+            .is_some_and(|extension| extension.eq_ignore_ascii_case("sol"))
+        {
+            Ok(Box::new(std::iter::once(metadata_file_path.clone())))
+        } else {
+            Ok(Box::new(
+                FilesWithExtensionIterator::new(self.directory()?).with_allowed_extension("sol"),
+            ))
+        }
+    }
+}
+
+define_wrapper_type!(
+    /// Represents a contract instance found a metadata file.
+    ///
+    /// Typically, this is used as the key to the "contracts" field of metadata files.
+    #[derive(
+        Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize,
+    )]
+    #[serde(transparent)]
+    pub struct ContractInstance(String);
+);
+
+define_wrapper_type!(
+    /// Represents a contract identifier found a metadata file.
+    ///
+    /// A contract identifier is the name of the contract in the source code.
+    #[derive(
+        Clone, Debug, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize,
+    )]
+    #[serde(transparent)]
+    pub struct ContractIdent(String);
+);
+
+/// Represents an identifier used for contracts.
+///
+/// The type supports serialization from and into the following string format:
+///
+/// ```text
+/// ${path}:${contract_ident}
+/// ```
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
+#[serde(try_from = "String", into = "String")]
+pub struct ContractPathAndIdent {
+    /// The path of the contract source code relative to the directory containing the metadata file.
+    pub contract_source_path: PathBuf,
+
+    /// The identifier of the contract.
+    pub contract_ident: ContractIdent,
+}
+
+impl Display for ContractPathAndIdent {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}:{}",
+            self.contract_source_path.display(),
+            self.contract_ident.as_ref()
+        )
+    }
+}
+
+impl FromStr for ContractPathAndIdent {
+    type Err = anyhow::Error;
+
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut splitted_string = s.split(":").peekable();
+        let mut path = None::<String>;
+        let mut identifier = None::<String>;
+        loop {
+            let Some(next_item) = splitted_string.next() else {
+                break;
+            };
+            if splitted_string.peek().is_some() {
+                match path {
+                    Some(ref mut path) => {
+                        path.push(':');
+                        path.push_str(next_item);
+                    }
+                    None => path = Some(next_item.to_owned()),
+                }
+            } else {
+                identifier = Some(next_item.to_owned())
+            }
+        }
+        match (path, identifier) {
+            (Some(path), Some(identifier)) => Ok(Self {
+                contract_source_path: PathBuf::from(path),
+                contract_ident: ContractIdent::new(identifier),
+            }),
+            (None, Some(path)) | (Some(path), None) => {
+                let Some(identifier) = path.split(".").next().map(ToOwned::to_owned) else {
+                    anyhow::bail!("Failed to find identifier");
+                };
+                Ok(Self {
+                    contract_source_path: PathBuf::from(path),
+                    contract_ident: ContractIdent::new(identifier),
+                })
+            }
+            (None, None) => anyhow::bail!("Failed to find the path and identifier"),
+        }
+    }
+}
+
+impl TryFrom<String> for ContractPathAndIdent {
+    type Error = anyhow::Error;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        Self::from_str(&value)
+    }
+}
+
+impl From<ContractPathAndIdent> for String {
+    fn from(value: ContractPathAndIdent) -> Self {
+        value.to_string()
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn contract_identifier_respects_roundtrip_property() {
+        // Arrange
+        let string = "ERC20/ERC20.sol:ERC20";
+
+        // Act
+        let identifier = ContractPathAndIdent::from_str(string);
+
+        // Assert
+        let identifier = identifier.expect("Failed to parse");
+        assert_eq!(
+            identifier.contract_source_path.display().to_string(),
+            "ERC20/ERC20.sol"
+        );
+        assert_eq!(identifier.contract_ident, "ERC20".to_owned().into());
+
+        // Act
+        let reserialized = identifier.to_string();
+
+        // Assert
+        assert_eq!(string, reserialized);
+    }
+
+    #[test]
+    fn complex_metadata_file_can_be_deserialized() {
+        // Arrange
+        const JSON: &str = include_str!("../../../assets/test_metadata.json");
+
+        // Act
+        let metadata = serde_json::from_str::<Metadata>(JSON);
+
+        // Assert
+        metadata.expect("Failed to deserialize metadata");
+    }
+}

crates/format/src/mode.rs

@@ -0,0 +1,106 @@
+use revive_dt_common::types::VersionOrRequirement;
+use semver::Version;
+use serde::de::Deserializer;
+use serde::{Deserialize, Serialize};
+
+/// Specifies the compilation mode of the test artifact.
+#[derive(Hash, Debug, Clone, Eq, PartialEq)]
+pub enum Mode {
+    Solidity(SolcMode),
+    Unknown(String),
+}
+
+/// Specify Solidity specific compiler options.
+#[derive(Hash, Debug, Default, Clone, Eq, PartialEq, Serialize, Deserialize)]
+pub struct SolcMode {
+    pub solc_version: Option<semver::VersionReq>,
+    solc_optimize: Option<bool>,
+    pub llvm_optimizer_settings: Vec<String>,
+}
+
+impl SolcMode {
+    /// Try to parse a mode string into a solc mode.
+    /// Returns `None` if the string wasn't a solc YUL mode string.
+    ///
+    /// The mode string is expected to start with the `Y` ID (YUL ID),
+    /// optionally followed by `+` or `-` for the solc optimizer settings.
+    ///
+    /// Options can be separated by a whitespace contain the following
+    /// - A solc `SemVer version requirement` string
+    /// - One or more `-OX` where X is a supposed to be an LLVM opt mode
+    pub fn parse_from_mode_string(mode_string: &str) -> Option<Self> {
+        let mut result = Self::default();
+
+        let mut parts = mode_string.trim().split(" ");
+
+        match parts.next()? {
+            "Y" => {}
+            "Y+" => result.solc_optimize = Some(true),
+            "Y-" => result.solc_optimize = Some(false),
+            _ => return None,
+        }
+
+        for part in parts {
+            if let Ok(solc_version) = semver::VersionReq::parse(part) {
+                result.solc_version = Some(solc_version);
+                continue;
+            }
+            if let Some(level) = part.strip_prefix("-O") {
+                result.llvm_optimizer_settings.push(level.to_string());
+                continue;
+            }
+            panic!("the YUL mode string {mode_string} failed to parse, invalid part: {part}")
+        }
+
+        Some(result)
+    }
+
+    /// Returns whether to enable the solc optimizer.
+    pub fn solc_optimize(&self) -> bool {
+        self.solc_optimize.unwrap_or(true)
+    }
+
+    /// Calculate the latest matching solc patch version. Returns:
+    /// - `latest_supported` if no version request was specified.
+    /// - A matching version with the same minor version as `latest_supported`, if any.
+    /// - `None` if no minor version of the `latest_supported` version matches.
+    pub fn last_patch_version(&self, latest_supported: &Version) -> Option<Version> {
+        let Some(version_req) = self.solc_version.as_ref() else {
+            return Some(latest_supported.to_owned());
+        };
+
+        // lgtm
+        for patch in (0..latest_supported.patch + 1).rev() {
+            let version = Version::new(0, latest_supported.minor, patch);
+            if version_req.matches(&version) {
+                return Some(version);
+            }
+        }
+
+        None
+    }
+
+    /// Resolves the [`SolcMode`]'s solidity version requirement into a [`VersionOrRequirement`] if
+    /// the requirement is present on the object. Otherwise, the passed default version is used.
+    pub fn compiler_version_to_use(&self, default: Version) -> VersionOrRequirement {
+        match self.solc_version {
+            Some(ref requirement) => requirement.clone().into(),
+            None => default.into(),
+        }
+    }
+}
+
+impl<'de> Deserialize<'de> for Mode {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let mode_string = String::deserialize(deserializer)?;
+
+        if let Some(solc_mode) = SolcMode::parse_from_mode_string(&mode_string) {
+            return Ok(Self::Solidity(solc_mode));
+        }
+
+        Ok(Self::Unknown(mode_string))
+    }
+}

crates/format/src/traits.rs

@@ -0,0 +1,33 @@
+use alloy::eips::BlockNumberOrTag;
+use alloy::primitives::{Address, BlockHash, BlockNumber, BlockTimestamp, ChainId, U256};
+use anyhow::Result;
+
+/// A trait of the interface are required to implement to be used by the resolution logic that this
+/// crate implements to go from string calldata and into the bytes calldata.
+pub trait ResolverApi {
+    /// Returns the ID of the chain that the node is on.
+    fn chain_id(&self) -> impl Future<Output = Result<ChainId>>;
+
+    // TODO: This is currently a u128 due to Kitchensink needing more than 64 bits for its gas limit
+    // when we implement the changes to the gas we need to adjust this to be a u64.
+    /// Returns the gas limit of the specified block.
+    fn block_gas_limit(&self, number: BlockNumberOrTag) -> impl Future<Output = Result<u128>>;
+
+    /// Returns the coinbase of the specified block.
+    fn block_coinbase(&self, number: BlockNumberOrTag) -> impl Future<Output = Result<Address>>;
+
+    /// Returns the difficulty of the specified block.
+    fn block_difficulty(&self, number: BlockNumberOrTag) -> impl Future<Output = Result<U256>>;
+
+    /// Returns the hash of the specified block.
+    fn block_hash(&self, number: BlockNumberOrTag) -> impl Future<Output = Result<BlockHash>>;
+
+    /// Returns the timestamp of the specified block,
+    fn block_timestamp(
+        &self,
+        number: BlockNumberOrTag,
+    ) -> impl Future<Output = Result<BlockTimestamp>>;
+
+    /// Returns the number of the last block.
+    fn last_block_number(&self) -> impl Future<Output = Result<BlockNumber>>;
+}

crates/node-interaction/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "revive-dt-node-interaction"
+description = "send and trace transactions to nodes"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+alloy = { workspace = true }
+anyhow = { workspace = true }

crates/node-interaction/src/lib.rs

@@ -0,0 +1,24 @@
+//! This crate implements all node interactions.
+
+use alloy::rpc::types::trace::geth::{DiffMode, GethDebugTracingOptions, GethTrace};
+use alloy::rpc::types::{TransactionReceipt, TransactionRequest};
+use anyhow::Result;
+
+/// An interface for all interactions with Ethereum compatible nodes.
+pub trait EthereumNode {
+    /// Execute the [TransactionRequest] and return a [TransactionReceipt].
+    fn execute_transaction(
+        &self,
+        transaction: TransactionRequest,
+    ) -> impl Future<Output = Result<TransactionReceipt>>;
+
+    /// Trace the transaction in the [TransactionReceipt] and return a [GethTrace].
+    fn trace_transaction(
+        &self,
+        receipt: &TransactionReceipt,
+        trace_options: GethDebugTracingOptions,
+    ) -> impl Future<Output = Result<GethTrace>>;
+
+    /// Returns the state diff of the transaction hash in the [TransactionReceipt].
+    fn state_diff(&self, receipt: &TransactionReceipt) -> impl Future<Output = Result<DiffMode>>;
+}

crates/node/Cargo.toml

@@ -0,0 +1,30 @@
+[package]
+name = "revive-dt-node"
+description = "abstraction over blockchain nodes"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+anyhow = { workspace = true }
+alloy = { workspace = true }
+tracing = { workspace = true }
+tokio = { workspace = true }
+
+revive-dt-common = { workspace = true }
+revive-dt-config = { workspace = true }
+revive-dt-format = { workspace = true }
+revive-dt-node-interaction = { workspace = true }
+
+serde = { workspace = true }
+serde_json = { workspace = true }
+
+sp-core = { workspace = true }
+sp-runtime = { workspace = true }
+
+[dev-dependencies]
+temp-dir = { workspace = true }
+tokio = { workspace = true }

crates/node/src/common.rs

@@ -0,0 +1,78 @@
+use alloy::{
+    network::{Network, TransactionBuilder},
+    providers::{
+        Provider, SendableTx,
+        fillers::{GasFiller, TxFiller},
+    },
+    transports::TransportResult,
+};
+
+#[derive(Clone, Debug)]
+pub struct FallbackGasFiller {
+    inner: GasFiller,
+    default_gas_limit: u64,
+    default_max_fee_per_gas: u128,
+    default_priority_fee: u128,
+}
+
+impl FallbackGasFiller {
+    pub fn new(
+        default_gas_limit: u64,
+        default_max_fee_per_gas: u128,
+        default_priority_fee: u128,
+    ) -> Self {
+        Self {
+            inner: GasFiller,
+            default_gas_limit,
+            default_max_fee_per_gas,
+            default_priority_fee,
+        }
+    }
+}
+
+impl<N> TxFiller<N> for FallbackGasFiller
+where
+    N: Network,
+{
+    type Fillable = Option<<GasFiller as TxFiller<N>>::Fillable>;
+
+    fn status(
+        &self,
+        tx: &<N as Network>::TransactionRequest,
+    ) -> alloy::providers::fillers::FillerControlFlow {
+        <GasFiller as TxFiller<N>>::status(&self.inner, tx)
+    }
+
+    fn fill_sync(&self, _: &mut alloy::providers::SendableTx<N>) {}
+
+    async fn prepare<P: Provider<N>>(
+        &self,
+        provider: &P,
+        tx: &<N as Network>::TransactionRequest,
+    ) -> TransportResult<Self::Fillable> {
+        // Try to fetch GasFiller’s “fillable” (gas_price, base_fee, estimate_gas, …)
+        // If it errors (i.e. tx would revert under eth_estimateGas), swallow it.
+        match self.inner.prepare(provider, tx).await {
+            Ok(fill) => Ok(Some(fill)),
+            Err(_) => Ok(None),
+        }
+    }
+
+    async fn fill(
+        &self,
+        fillable: Self::Fillable,
+        mut tx: alloy::providers::SendableTx<N>,
+    ) -> TransportResult<SendableTx<N>> {
+        if let Some(fill) = fillable {
+            // our inner GasFiller succeeded — use it
+            self.inner.fill(fill, tx).await
+        } else {
+            if let Some(builder) = tx.as_mut_builder() {
+                builder.set_gas_limit(self.default_gas_limit);
+                builder.set_max_fee_per_gas(self.default_max_fee_per_gas);
+                builder.set_max_priority_fee_per_gas(self.default_priority_fee);
+            }
+            Ok(tx)
+        }
+    }
+}

crates/node/src/constants.rs

@@ -0,0 +1,5 @@
+/// This constant defines how much Wei accounts are pre-seeded with in genesis.
+///
+/// Note: After changing this number, check that the tests for kitchensink work as we encountered
+/// some issues with different values of the initial balance on Kitchensink.
+pub const INITIAL_BALANCE: u128 = 10u128.pow(37);

crates/node/src/geth.rs

@@ -0,0 +1,679 @@
+//! The go-ethereum node implementation.
+
+use std::{
+    fs::{File, OpenOptions, create_dir_all, remove_dir_all},
+    io::{BufRead, BufReader, Read, Write},
+    ops::ControlFlow,
+    path::PathBuf,
+    process::{Child, Command, Stdio},
+    sync::{
+        Arc,
+        atomic::{AtomicU32, Ordering},
+    },
+    time::{Duration, Instant},
+};
+
+use alloy::{
+    eips::BlockNumberOrTag,
+    genesis::{Genesis, GenesisAccount},
+    network::{Ethereum, EthereumWallet, NetworkWallet},
+    primitives::{Address, BlockHash, BlockNumber, BlockTimestamp, FixedBytes, U256},
+    providers::{
+        Provider, ProviderBuilder,
+        ext::DebugApi,
+        fillers::{CachedNonceManager, ChainIdFiller, FillProvider, NonceFiller, TxFiller},
+    },
+    rpc::types::{
+        TransactionReceipt, TransactionRequest,
+        trace::geth::{DiffMode, GethDebugTracingOptions, PreStateConfig, PreStateFrame},
+    },
+    signers::local::PrivateKeySigner,
+};
+use tracing::{Instrument, Level};
+
+use revive_dt_common::{fs::clear_directory, futures::poll};
+use revive_dt_config::Arguments;
+use revive_dt_format::traits::ResolverApi;
+use revive_dt_node_interaction::EthereumNode;
+
+use crate::{Node, common::FallbackGasFiller, constants::INITIAL_BALANCE};
+
+static NODE_COUNT: AtomicU32 = AtomicU32::new(0);
+
+/// The go-ethereum node instance implementation.
+///
+/// Implements helpers to initialize, spawn and wait the node.
+///
+/// Assumes dev mode and IPC only (`P2P`, `http`` etc. are kept disabled).
+///
+/// Prunes the child process and the base directory on drop.
+#[derive(Debug)]
+pub struct GethNode {
+    connection_string: String,
+    base_directory: PathBuf,
+    data_directory: PathBuf,
+    logs_directory: PathBuf,
+    geth: PathBuf,
+    id: u32,
+    handle: Option<Child>,
+    network_id: u64,
+    start_timeout: u64,
+    wallet: EthereumWallet,
+    nonce_manager: CachedNonceManager,
+    /// This vector stores [`File`] objects that we use for logging which we want to flush when the
+    /// node object is dropped. We do not store them in a structured fashion at the moment (in
+    /// separate fields) as the logic that we need to apply to them is all the same regardless of
+    /// what it belongs to, we just want to flush them on [`Drop`] of the node.
+    logs_file_to_flush: Vec<File>,
+}
+
+impl GethNode {
+    const BASE_DIRECTORY: &str = "geth";
+    const DATA_DIRECTORY: &str = "data";
+    const LOGS_DIRECTORY: &str = "logs";
+
+    const IPC_FILE: &str = "geth.ipc";
+    const GENESIS_JSON_FILE: &str = "genesis.json";
+
+    const READY_MARKER: &str = "IPC endpoint opened";
+    const ERROR_MARKER: &str = "Fatal:";
+
+    const GETH_STDOUT_LOG_FILE_NAME: &str = "node_stdout.log";
+    const GETH_STDERR_LOG_FILE_NAME: &str = "node_stderr.log";
+
+    const TRANSACTION_INDEXING_ERROR: &str = "transaction indexing is in progress";
+    const TRANSACTION_TRACING_ERROR: &str = "historical state not available in path scheme yet";
+
+    const RECEIPT_POLLING_DURATION: Duration = Duration::from_secs(5 * 60);
+    const TRACE_POLLING_DURATION: Duration = Duration::from_secs(60);
+
+    /// Create the node directory and call `geth init` to configure the genesis.
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn init(&mut self, genesis: String) -> anyhow::Result<&mut Self> {
+        let _ = clear_directory(&self.base_directory);
+        let _ = clear_directory(&self.logs_directory);
+
+        create_dir_all(&self.base_directory)?;
+        create_dir_all(&self.logs_directory)?;
+
+        let mut genesis = serde_json::from_str::<Genesis>(&genesis)?;
+        for signer_address in
+            <EthereumWallet as NetworkWallet<Ethereum>>::signer_addresses(&self.wallet)
+        {
+            // Note, the use of the entry API here means that we only modify the entries for any
+            // account that is not in the `alloc` field of the genesis state.
+            genesis
+                .alloc
+                .entry(signer_address)
+                .or_insert(GenesisAccount::default().with_balance(U256::from(INITIAL_BALANCE)));
+        }
+        let genesis_path = self.base_directory.join(Self::GENESIS_JSON_FILE);
+        serde_json::to_writer(File::create(&genesis_path)?, &genesis)?;
+
+        let mut child = Command::new(&self.geth)
+            .arg("--state.scheme")
+            .arg("hash")
+            .arg("init")
+            .arg("--datadir")
+            .arg(&self.data_directory)
+            .arg(genesis_path)
+            .stderr(Stdio::piped())
+            .stdout(Stdio::null())
+            .spawn()?;
+
+        let mut stderr = String::new();
+        child
+            .stderr
+            .take()
+            .expect("should be piped")
+            .read_to_string(&mut stderr)?;
+
+        if !child.wait()?.success() {
+            anyhow::bail!("failed to initialize geth node #{:?}: {stderr}", &self.id);
+        }
+
+        Ok(self)
+    }
+
+    /// Spawn the go-ethereum node child process.
+    ///
+    /// [Instance::init] must be called prior.
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn spawn_process(&mut self) -> anyhow::Result<&mut Self> {
+        // This is the `OpenOptions` that we wish to use for all of the log files that we will be
+        // opening in this method. We need to construct it in this way to:
+        // 1. Be consistent
+        // 2. Less verbose and more dry
+        // 3. Because the builder pattern uses mutable references so we need to get around that.
+        let open_options = {
+            let mut options = OpenOptions::new();
+            options.create(true).truncate(true).write(true);
+            options
+        };
+
+        let stdout_logs_file = open_options
+            .clone()
+            .open(self.geth_stdout_log_file_path())?;
+        let stderr_logs_file = open_options.open(self.geth_stderr_log_file_path())?;
+        self.handle = Command::new(&self.geth)
+            .arg("--dev")
+            .arg("--datadir")
+            .arg(&self.data_directory)
+            .arg("--ipcpath")
+            .arg(&self.connection_string)
+            .arg("--networkid")
+            .arg(self.network_id.to_string())
+            .arg("--nodiscover")
+            .arg("--maxpeers")
+            .arg("0")
+            .arg("--txlookuplimit")
+            .arg("0")
+            .arg("--cache.blocklogs")
+            .arg("512")
+            .arg("--state.scheme")
+            .arg("hash")
+            .arg("--syncmode")
+            .arg("full")
+            .arg("--gcmode")
+            .arg("archive")
+            .stderr(stderr_logs_file.try_clone()?)
+            .stdout(stdout_logs_file.try_clone()?)
+            .spawn()?
+            .into();
+
+        if let Err(error) = self.wait_ready() {
+            tracing::error!(?error, "Failed to start geth, shutting down gracefully");
+            self.shutdown()?;
+            return Err(error);
+        }
+
+        self.logs_file_to_flush
+            .extend([stderr_logs_file, stdout_logs_file]);
+
+        Ok(self)
+    }
+
+    /// Wait for the g-ethereum node child process getting ready.
+    ///
+    /// [Instance::spawn_process] must be called priorly.
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn wait_ready(&mut self) -> anyhow::Result<&mut Self> {
+        let start_time = Instant::now();
+
+        let logs_file = OpenOptions::new()
+            .read(true)
+            .write(false)
+            .append(false)
+            .truncate(false)
+            .open(self.geth_stderr_log_file_path())?;
+
+        let maximum_wait_time = Duration::from_millis(self.start_timeout);
+        let mut stderr = BufReader::new(logs_file).lines();
+        loop {
+            if let Some(Ok(line)) = stderr.next() {
+                if line.contains(Self::ERROR_MARKER) {
+                    anyhow::bail!("Failed to start geth {line}");
+                }
+                if line.contains(Self::READY_MARKER) {
+                    return Ok(self);
+                }
+            }
+            if Instant::now().duration_since(start_time) > maximum_wait_time {
+                anyhow::bail!("Timeout in starting geth");
+            }
+        }
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id), level = Level::TRACE)]
+    fn geth_stdout_log_file_path(&self) -> PathBuf {
+        self.logs_directory.join(Self::GETH_STDOUT_LOG_FILE_NAME)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id), level = Level::TRACE)]
+    fn geth_stderr_log_file_path(&self) -> PathBuf {
+        self.logs_directory.join(Self::GETH_STDERR_LOG_FILE_NAME)
+    }
+
+    fn provider(
+        &self,
+    ) -> impl Future<
+        Output = anyhow::Result<
+            FillProvider<impl TxFiller<Ethereum>, impl Provider<Ethereum>, Ethereum>,
+        >,
+    > + 'static {
+        let connection_string = self.connection_string();
+        let wallet = self.wallet.clone();
+
+        // Note: We would like all providers to make use of the same nonce manager so that we have
+        // monotonically increasing nonces that are cached. The cached nonce manager uses Arc's in
+        // its implementation and therefore it means that when we clone it then it still references
+        // the same state.
+        let nonce_manager = self.nonce_manager.clone();
+
+        Box::pin(async move {
+            ProviderBuilder::new()
+                .disable_recommended_fillers()
+                .filler(FallbackGasFiller::new(500_000_000, 500_000_000, 1))
+                .filler(ChainIdFiller::default())
+                .filler(NonceFiller::new(nonce_manager))
+                .wallet(wallet)
+                .connect(&connection_string)
+                .await
+                .map_err(Into::into)
+        })
+    }
+}
+
+impl EthereumNode for GethNode {
+    #[tracing::instrument(level = "info", skip_all, fields(geth_node_id = self.id))]
+    async fn execute_transaction(
+        &self,
+        transaction: TransactionRequest,
+    ) -> anyhow::Result<alloy::rpc::types::TransactionReceipt> {
+        let span = tracing::debug_span!("Submitting transaction", ?transaction);
+        let _guard = span.enter();
+
+        let provider = Arc::new(self.provider().await?);
+        let transaction_hash = *provider.send_transaction(transaction).await?.tx_hash();
+
+        // The following is a fix for the "transaction indexing is in progress" error that we
+        // used to get. You can find more information on this in the following GH issue in geth
+        // https://github.com/ethereum/go-ethereum/issues/28877. To summarize what's going on,
+        // before we can get the receipt of the transaction it needs to have been indexed by the
+        // node's indexer. Just because the transaction has been confirmed it doesn't mean that
+        // it has been indexed. When we call alloy's `get_receipt` it checks if the transaction
+        // was confirmed. If it has been, then it will call `eth_getTransactionReceipt` method
+        // which _might_ return the above error if the tx has not yet been indexed yet. So, we
+        // need to implement a retry mechanism for the receipt to keep retrying to get it until
+        // it eventually works, but we only do that if the error we get back is the "transaction
+        // indexing is in progress" error or if the receipt is None.
+        //
+        // Getting the transaction indexed and taking a receipt can take a long time especially
+        // when a lot of transactions are being submitted to the node. Thus, while initially we
+        // only allowed for 60 seconds of waiting with a 1 second delay in polling, we need to
+        // allow for a larger wait time. Therefore, in here we allow for 5 minutes of waiting
+        // with exponential backoff each time we attempt to get the receipt and find that it's
+        // not available.
+        poll(
+            Self::RECEIPT_POLLING_DURATION,
+            Default::default(),
+            move || {
+                let provider = provider.clone();
+                async move {
+                    match provider.get_transaction_receipt(transaction_hash).await {
+                        Ok(Some(receipt)) => Ok(ControlFlow::Break(receipt)),
+                        Ok(None) => Ok(ControlFlow::Continue(())),
+                        Err(error) => {
+                            let error_string = error.to_string();
+                            match error_string.contains(Self::TRANSACTION_INDEXING_ERROR) {
+                                true => Ok(ControlFlow::Continue(())),
+                                false => Err(error.into()),
+                            }
+                        }
+                    }
+                }
+            },
+        )
+        .instrument(tracing::info_span!(
+            "Awaiting transaction receipt",
+            ?transaction_hash
+        ))
+        .await
+    }
+
+    #[tracing::instrument(level = "info", skip_all, fields(geth_node_id = self.id))]
+    async fn trace_transaction(
+        &self,
+        transaction: &TransactionReceipt,
+        trace_options: GethDebugTracingOptions,
+    ) -> anyhow::Result<alloy::rpc::types::trace::geth::GethTrace> {
+        let provider = Arc::new(self.provider().await?);
+        poll(
+            Self::TRACE_POLLING_DURATION,
+            Default::default(),
+            move || {
+                let provider = provider.clone();
+                let trace_options = trace_options.clone();
+                async move {
+                    match provider
+                        .debug_trace_transaction(transaction.transaction_hash, trace_options)
+                        .await
+                    {
+                        Ok(trace) => Ok(ControlFlow::Break(trace)),
+                        Err(error) => {
+                            let error_string = error.to_string();
+                            match error_string.contains(Self::TRANSACTION_TRACING_ERROR) {
+                                true => Ok(ControlFlow::Continue(())),
+                                false => Err(error.into()),
+                            }
+                        }
+                    }
+                }
+            },
+        )
+        .await
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn state_diff(&self, transaction: &TransactionReceipt) -> anyhow::Result<DiffMode> {
+        let trace_options = GethDebugTracingOptions::prestate_tracer(PreStateConfig {
+            diff_mode: Some(true),
+            disable_code: None,
+            disable_storage: None,
+        });
+        match self
+            .trace_transaction(transaction, trace_options)
+            .await?
+            .try_into_pre_state_frame()?
+        {
+            PreStateFrame::Diff(diff) => Ok(diff),
+            _ => anyhow::bail!("expected a diff mode trace"),
+        }
+    }
+}
+
+impl ResolverApi for GethNode {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn chain_id(&self) -> anyhow::Result<alloy::primitives::ChainId> {
+        self.provider()
+            .await?
+            .get_chain_id()
+            .await
+            .map_err(Into::into)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn block_gas_limit(&self, number: BlockNumberOrTag) -> anyhow::Result<u128> {
+        self.provider()
+            .await?
+            .get_block_by_number(number)
+            .await?
+            .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+            .map(|block| block.header.gas_limit as _)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn block_coinbase(&self, number: BlockNumberOrTag) -> anyhow::Result<Address> {
+        self.provider()
+            .await?
+            .get_block_by_number(number)
+            .await?
+            .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+            .map(|block| block.header.beneficiary)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn block_difficulty(&self, number: BlockNumberOrTag) -> anyhow::Result<U256> {
+        self.provider()
+            .await?
+            .get_block_by_number(number)
+            .await?
+            .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+            .map(|block| block.header.difficulty)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn block_hash(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockHash> {
+        self.provider()
+            .await?
+            .get_block_by_number(number)
+            .await?
+            .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+            .map(|block| block.header.hash)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn block_timestamp(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockTimestamp> {
+        self.provider()
+            .await?
+            .get_block_by_number(number)
+            .await?
+            .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+            .map(|block| block.header.timestamp)
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    async fn last_block_number(&self) -> anyhow::Result<BlockNumber> {
+        self.provider()
+            .await?
+            .get_block_number()
+            .await
+            .map_err(Into::into)
+    }
+}
+
+impl Node for GethNode {
+    fn new(config: &Arguments) -> Self {
+        let geth_directory = config.directory().join(Self::BASE_DIRECTORY);
+        let id = NODE_COUNT.fetch_add(1, Ordering::SeqCst);
+        let base_directory = geth_directory.join(id.to_string());
+
+        let mut wallet = config.wallet();
+        for signer in (1..=config.private_keys_to_add)
+            .map(|id| U256::from(id))
+            .map(|id| id.to_be_bytes::<32>())
+            .map(|id| PrivateKeySigner::from_bytes(&FixedBytes(id)).unwrap())
+        {
+            wallet.register_signer(signer);
+        }
+
+        Self {
+            connection_string: base_directory.join(Self::IPC_FILE).display().to_string(),
+            data_directory: base_directory.join(Self::DATA_DIRECTORY),
+            logs_directory: base_directory.join(Self::LOGS_DIRECTORY),
+            base_directory,
+            geth: config.geth.clone(),
+            id,
+            handle: None,
+            network_id: config.network_id,
+            start_timeout: config.geth_start_timeout,
+            wallet,
+            // We know that we only need to be storing 2 files so we can specify that when creating
+            // the vector. It's the stdout and stderr of the geth node.
+            logs_file_to_flush: Vec::with_capacity(2),
+            nonce_manager: Default::default(),
+        }
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn connection_string(&self) -> String {
+        self.connection_string.clone()
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn shutdown(&mut self) -> anyhow::Result<()> {
+        // Terminate the processes in a graceful manner to allow for the output to be flushed.
+        if let Some(mut child) = self.handle.take() {
+            child
+                .kill()
+                .map_err(|error| anyhow::anyhow!("Failed to kill the geth process: {error:?}"))?;
+        }
+
+        // Flushing the files that we're using for keeping the logs before shutdown.
+        for file in self.logs_file_to_flush.iter_mut() {
+            file.flush()?
+        }
+
+        // Remove the node's database so that subsequent runs do not run on the same database. We
+        // ignore the error just in case the directory didn't exist in the first place and therefore
+        // there's nothing to be deleted.
+        let _ = remove_dir_all(self.base_directory.join(Self::DATA_DIRECTORY));
+
+        Ok(())
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn spawn(&mut self, genesis: String) -> anyhow::Result<()> {
+        self.init(genesis)?.spawn_process()?;
+        Ok(())
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn version(&self) -> anyhow::Result<String> {
+        let output = Command::new(&self.geth)
+            .arg("--version")
+            .stdin(Stdio::null())
+            .stdout(Stdio::piped())
+            .stderr(Stdio::null())
+            .spawn()?
+            .wait_with_output()?
+            .stdout;
+        Ok(String::from_utf8_lossy(&output).into())
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn matches_target(&self, targets: Option<&[String]>) -> bool {
+        match targets {
+            None => true,
+            Some(targets) => targets.iter().any(|str| str.as_str() == "evm"),
+        }
+    }
+}
+
+impl Drop for GethNode {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn drop(&mut self) {
+        self.shutdown().expect("Failed to shutdown")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use revive_dt_config::Arguments;
+
+    use temp_dir::TempDir;
+
+    use crate::{GENESIS_JSON, Node};
+
+    use super::*;
+
+    fn test_config() -> (Arguments, TempDir) {
+        let mut config = Arguments::default();
+        let temp_dir = TempDir::new().unwrap();
+        config.working_directory = temp_dir.path().to_path_buf().into();
+
+        (config, temp_dir)
+    }
+
+    fn new_node() -> (GethNode, TempDir) {
+        let (args, temp_dir) = test_config();
+        let mut node = GethNode::new(&args);
+        node.init(GENESIS_JSON.to_owned())
+            .expect("Failed to initialize the node")
+            .spawn_process()
+            .expect("Failed to spawn the node process");
+        (node, temp_dir)
+    }
+
+    #[test]
+    fn init_works() {
+        GethNode::new(&test_config().0)
+            .init(GENESIS_JSON.to_string())
+            .unwrap();
+    }
+
+    #[test]
+    fn spawn_works() {
+        GethNode::new(&test_config().0)
+            .spawn(GENESIS_JSON.to_string())
+            .unwrap();
+    }
+
+    #[test]
+    fn version_works() {
+        let version = GethNode::new(&test_config().0).version().unwrap();
+        assert!(
+            version.starts_with("geth version"),
+            "expected version string, got: '{version}'"
+        );
+    }
+
+    #[tokio::test]
+    async fn can_get_chain_id_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let chain_id = node.chain_id().await;
+
+        // Assert
+        let chain_id = chain_id.expect("Failed to get the chain id");
+        assert_eq!(chain_id, 420_420_420);
+    }
+
+    #[tokio::test]
+    async fn can_get_gas_limit_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let gas_limit = node.block_gas_limit(BlockNumberOrTag::Latest).await;
+
+        // Assert
+        let gas_limit = gas_limit.expect("Failed to get the gas limit");
+        assert_eq!(gas_limit, u32::MAX as u128)
+    }
+
+    #[tokio::test]
+    async fn can_get_coinbase_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let coinbase = node.block_coinbase(BlockNumberOrTag::Latest).await;
+
+        // Assert
+        let coinbase = coinbase.expect("Failed to get the coinbase");
+        assert_eq!(coinbase, Address::new([0xFF; 20]))
+    }
+
+    #[tokio::test]
+    async fn can_get_block_difficulty_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_difficulty = node.block_difficulty(BlockNumberOrTag::Latest).await;
+
+        // Assert
+        let block_difficulty = block_difficulty.expect("Failed to get the block difficulty");
+        assert_eq!(block_difficulty, U256::ZERO)
+    }
+
+    #[tokio::test]
+    async fn can_get_block_hash_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_hash = node.block_hash(BlockNumberOrTag::Latest).await;
+
+        // Assert
+        let _ = block_hash.expect("Failed to get the block hash");
+    }
+
+    #[tokio::test]
+    async fn can_get_block_timestamp_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_timestamp = node.block_timestamp(BlockNumberOrTag::Latest).await;
+
+        // Assert
+        let _ = block_timestamp.expect("Failed to get the block timestamp");
+    }
+
+    #[tokio::test]
+    async fn can_get_block_number_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_number = node.last_block_number().await;
+
+        // Assert
+        let block_number = block_number.expect("Failed to get the block number");
+        assert_eq!(block_number, 0)
+    }
+}

crates/node/src/lib.rs

@@ -0,0 +1,39 @@
+//! This crate implements the testing nodes.
+
+use revive_dt_config::Arguments;
+use revive_dt_node_interaction::EthereumNode;
+
+pub mod common;
+pub mod constants;
+pub mod geth;
+pub mod kitchensink;
+pub mod pool;
+
+/// The default genesis configuration.
+pub const GENESIS_JSON: &str = include_str!("../../../genesis.json");
+
+/// An abstract interface for testing nodes.
+pub trait Node: EthereumNode {
+    /// Create a new uninitialized instance.
+    fn new(config: &Arguments) -> Self;
+
+    /// Spawns a node configured according to the genesis json.
+    ///
+    /// Blocking until it's ready to accept transactions.
+    fn spawn(&mut self, genesis: String) -> anyhow::Result<()>;
+
+    /// Prune the node instance and related data.
+    ///
+    /// Blocking until it's completely stopped.
+    fn shutdown(&mut self) -> anyhow::Result<()>;
+
+    /// Returns the nodes connection string.
+    fn connection_string(&self) -> String;
+
+    /// Returns the node version.
+    fn version(&self) -> anyhow::Result<String>;
+
+    /// Given a list of targets from the metadata file, this function determines if the metadata
+    /// file can be ran on this node or not.
+    fn matches_target(&self, targets: Option<&[String]>) -> bool;
+}

crates/node/src/pool.rs

@@ -0,0 +1,68 @@
+//! This crate implements concurrent handling of testing node.
+
+use std::{
+    fs::read_to_string,
+    sync::atomic::{AtomicUsize, Ordering},
+    thread,
+};
+
+use anyhow::Context;
+use revive_dt_config::Arguments;
+
+use crate::Node;
+
+/// The node pool starts one or more [Node] which then can be accessed
+/// in a round robbin fasion.
+pub struct NodePool<T> {
+    next: AtomicUsize,
+    nodes: Vec<T>,
+}
+
+impl<T> NodePool<T>
+where
+    T: Node + Send + 'static,
+{
+    /// Create a new Pool. This will start as many nodes as there are workers in `config`.
+    pub fn new(config: &Arguments) -> anyhow::Result<Self> {
+        let nodes = config.number_of_nodes;
+        let genesis = read_to_string(&config.genesis_file).context(format!(
+            "can not read genesis file: {}",
+            config.genesis_file.display()
+        ))?;
+
+        let mut handles = Vec::with_capacity(nodes);
+        for _ in 0..nodes {
+            let config = config.clone();
+            let genesis = genesis.clone();
+            handles.push(thread::spawn(move || spawn_node::<T>(&config, genesis)));
+        }
+
+        let mut nodes = Vec::with_capacity(nodes);
+        for handle in handles {
+            nodes.push(
+                handle
+                    .join()
+                    .map_err(|error| anyhow::anyhow!("failed to spawn node: {:?}", error))?
+                    .map_err(|error| anyhow::anyhow!("node failed to spawn: {error}"))?,
+            );
+        }
+
+        Ok(Self {
+            nodes,
+            next: Default::default(),
+        })
+    }
+
+    /// Get a handle to the next node.
+    pub fn round_robbin(&self) -> &T {
+        let current = self.next.fetch_add(1, Ordering::SeqCst) % self.nodes.len();
+        self.nodes.get(current).unwrap()
+    }
+}
+
+fn spawn_node<T: Node + Send>(args: &Arguments, genesis: String) -> anyhow::Result<T> {
+    let mut node = T::new(args);
+    tracing::info!("starting node: {}", node.connection_string());
+    node.spawn(genesis)?;
+    Ok(node)
+}

crates/report/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "revive-dt-report"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+revive-dt-config = { workspace = true }
+revive-dt-format = { workspace = true }
+revive-dt-compiler = { workspace = true }
+
+anyhow = { workspace = true }
+tracing = { workspace = true }
+serde = { workspace = true }
+serde_json = { workspace = true }

crates/report/src/analyzer.rs

@@ -0,0 +1,81 @@
+//! The report analyzer enriches the raw report data.
+
+use revive_dt_compiler::CompilerOutput;
+use serde::{Deserialize, Serialize};
+
+use crate::reporter::CompilationTask;
+
+/// Provides insights into how well the compilers perform.
+#[derive(Clone, Default, Debug, Serialize, Deserialize, PartialEq, PartialOrd)]
+pub struct CompilerStatistics {
+    /// The sum of contracts observed.
+    pub n_contracts: usize,
+    /// The mean size of compiled contracts.
+    pub mean_code_size: usize,
+    /// The mean size of the optimized YUL IR.
+    pub mean_yul_size: usize,
+    /// Is a proxy because the YUL also contains a lot of comments.
+    pub yul_to_bytecode_size_ratio: f32,
+}
+
+impl CompilerStatistics {
+    /// Cumulatively update the statistics with the next compiler task.
+    pub fn sample(&mut self, compilation_task: &CompilationTask) {
+        let Some(CompilerOutput { contracts }) = &compilation_task.json_output else {
+            return;
+        };
+
+        for (_solidity, contracts) in contracts.iter() {
+            for (_name, (bytecode, _)) in contracts.iter() {
+                // The EVM bytecode can be unlinked and thus is not necessarily a decodable hex
+                // string; for our statistics this is a good enough approximation.
+                let bytecode_size = bytecode.len() / 2;
+
+                // TODO: for the time being we set the yul_size to be zero. We need to change this
+                // when we overhaul the reporting.
+
+                self.update_sizes(bytecode_size, 0);
+            }
+        }
+    }
+
+    /// Updates the size statistics cumulatively.
+    fn update_sizes(&mut self, bytecode_size: usize, yul_size: usize) {
+        let n_previous = self.n_contracts;
+        let n_current = self.n_contracts + 1;
+
+        self.n_contracts = n_current;
+
+        self.mean_code_size = (n_previous * self.mean_code_size + bytecode_size) / n_current;
+        self.mean_yul_size = (n_previous * self.mean_yul_size + yul_size) / n_current;
+
+        if self.mean_code_size > 0 {
+            self.yul_to_bytecode_size_ratio =
+                self.mean_yul_size as f32 / self.mean_code_size as f32;
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::CompilerStatistics;
+
+    #[test]
+    fn compiler_statistics() {
+        let mut received = CompilerStatistics::default();
+        received.update_sizes(0, 0);
+        received.update_sizes(3, 37);
+        received.update_sizes(123, 456);
+
+        let mean_code_size = 41; // rounding error from integer truncation
+        let mean_yul_size = 164;
+        let expected = CompilerStatistics {
+            n_contracts: 3,
+            mean_code_size,
+            mean_yul_size,
+            yul_to_bytecode_size_ratio: mean_yul_size as f32 / mean_code_size as f32,
+        };
+
+        assert_eq!(received, expected);
+    }
+}

crates/report/src/lib.rs

@@ -0,0 +1,4 @@
+//! The revive differential tests reporting facility.
+
+pub mod analyzer;
+pub mod reporter;

crates/report/src/reporter.rs

@@ -0,0 +1,235 @@
+//! The reporter is the central place observing test execution by collecting data.
+//!
+//! The data collected gives useful insights into the outcome of the test run
+//! and helps identifying and reproducing failing cases.
+
+use std::{
+    collections::HashMap,
+    fs::{self, File, create_dir_all},
+    path::PathBuf,
+    sync::{Mutex, OnceLock},
+    time::{SystemTime, UNIX_EPOCH},
+};
+
+use anyhow::Context;
+use revive_dt_compiler::{CompilerInput, CompilerOutput};
+use serde::{Deserialize, Serialize};
+
+use revive_dt_config::{Arguments, TestingPlatform};
+use revive_dt_format::{corpus::Corpus, mode::SolcMode};
+
+use crate::analyzer::CompilerStatistics;
+
+pub(crate) static REPORTER: OnceLock<Mutex<Report>> = OnceLock::new();
+
+/// The `Report` datastructure stores all relevant inforamtion required for generating reports.
+#[derive(Clone, Debug, Default, Serialize, Deserialize)]
+pub struct Report {
+    /// The configuration used during the test.
+    pub config: Arguments,
+    /// The observed test corpora.
+    pub corpora: Vec<Corpus>,
+    /// The observed test definitions.
+    pub metadata_files: Vec<PathBuf>,
+    /// The observed compilation results.
+    pub compiler_results: HashMap<TestingPlatform, Vec<CompilationResult>>,
+    /// The observed compilation statistics.
+    pub compiler_statistics: HashMap<TestingPlatform, CompilerStatistics>,
+    /// The file name this is serialized to.
+    #[serde(skip)]
+    directory: PathBuf,
+}
+
+/// Contains a compiled contract.
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct CompilationTask {
+    /// The observed compiler input.
+    pub json_input: CompilerInput,
+    /// The observed compiler output.
+    pub json_output: Option<CompilerOutput>,
+    /// The observed compiler mode.
+    pub mode: SolcMode,
+    /// The observed compiler version.
+    pub compiler_version: String,
+    /// The observed error, if any.
+    pub error: Option<String>,
+}
+
+/// Represents a report about a compilation task.
+#[derive(Clone, Debug, Serialize, Deserialize)]
+pub struct CompilationResult {
+    /// The observed compilation task.
+    pub compilation_task: CompilationTask,
+    /// The linked span.
+    pub span: Span,
+}
+
+/// The [Span] struct indicates the context of what is being reported.
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
+pub struct Span {
+    /// The corpus index this belongs to.
+    corpus: usize,
+    /// The metadata file this belongs to.
+    metadata_file: usize,
+    /// The index of the case definition this belongs to.
+    case: usize,
+    /// The index of the case input this belongs to.
+    input: usize,
+}
+
+impl Report {
+    /// The file name where this report will be written to.
+    pub const FILE_NAME: &str = "report.json";
+
+    /// The [Span] is expected to initialize the reporter by providing the config.
+    const INITIALIZED_VIA_SPAN: &str = "requires a Span which initializes the reporter";
+
+    /// Create a new [Report].
+    fn new(config: Arguments) -> anyhow::Result<Self> {
+        let now = SystemTime::now()
+            .duration_since(UNIX_EPOCH)
+            .unwrap()
+            .as_millis();
+
+        let directory = config.directory().join("report").join(format!("{now}"));
+        if !directory.exists() {
+            create_dir_all(&directory)?;
+        }
+
+        Ok(Self {
+            config,
+            directory,
+            ..Default::default()
+        })
+    }
+
+    /// Add a compilation task to the report.
+    pub fn compilation(span: Span, platform: TestingPlatform, compilation_task: CompilationTask) {
+        let mut report = REPORTER
+            .get()
+            .expect(Report::INITIALIZED_VIA_SPAN)
+            .lock()
+            .unwrap();
+
+        report
+            .compiler_statistics
+            .entry(platform)
+            .or_default()
+            .sample(&compilation_task);
+
+        report
+            .compiler_results
+            .entry(platform)
+            .or_default()
+            .push(CompilationResult {
+                compilation_task,
+                span,
+            });
+    }
+
+    /// Write the report to disk.
+    pub fn save() -> anyhow::Result<()> {
+        let Some(reporter) = REPORTER.get() else {
+            return Ok(());
+        };
+        let report = reporter.lock().unwrap();
+
+        if let Err(error) = report.write_to_file() {
+            anyhow::bail!("can not write report: {error}");
+        }
+
+        if report.config.extract_problems {
+            if let Err(error) = report.save_compiler_problems() {
+                anyhow::bail!("can not write compiler problems: {error}");
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Write compiler problems to disk for later debugging.
+    pub fn save_compiler_problems(&self) -> anyhow::Result<()> {
+        for (platform, results) in self.compiler_results.iter() {
+            for result in results {
+                // ignore if there were no errors
+                if result.compilation_task.error.is_none() {
+                    continue;
+                }
+
+                let path = &self.metadata_files[result.span.metadata_file]
+                    .parent()
+                    .unwrap()
+                    .join(format!("{platform}_errors"));
+                if !path.exists() {
+                    create_dir_all(path)?;
+                }
+
+                if let Some(error) = result.compilation_task.error.as_ref() {
+                    fs::write(path.join("compiler_error.txt"), error)?;
+                }
+
+                if let Some(errors) = result.compilation_task.json_output.as_ref() {
+                    let file = File::create(path.join("compiler_output.txt"))?;
+                    serde_json::to_writer_pretty(file, &errors)?;
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    fn write_to_file(&self) -> anyhow::Result<()> {
+        let path = self.directory.join(Self::FILE_NAME);
+
+        let file = File::create(&path).context(path.display().to_string())?;
+        serde_json::to_writer_pretty(file, &self)?;
+
+        tracing::info!("report written to: {}", path.display());
+
+        Ok(())
+    }
+}
+
+impl Span {
+    /// Create a new [Span] with case and input index at 0.
+    ///
+    /// Initializes the reporting facility on the first call.
+    pub fn new(corpus: Corpus, config: Arguments) -> anyhow::Result<Self> {
+        let report = Mutex::new(Report::new(config)?);
+        let mut reporter = REPORTER.get_or_init(|| report).lock().unwrap();
+        reporter.corpora.push(corpus);
+
+        Ok(Self {
+            corpus: reporter.corpora.len() - 1,
+            metadata_file: 0,
+            case: 0,
+            input: 0,
+        })
+    }
+
+    /// Advance to the next metadata file: Resets the case input index to 0.
+    pub fn next_metadata(&mut self, metadata_file: PathBuf) {
+        let mut reporter = REPORTER
+            .get()
+            .expect(Report::INITIALIZED_VIA_SPAN)
+            .lock()
+            .unwrap();
+
+        reporter.metadata_files.push(metadata_file);
+
+        self.metadata_file = reporter.metadata_files.len() - 1;
+        self.case = 0;
+        self.input = 0;
+    }
+
+    /// Advance to the next case: Increas the case index by one and resets the input index to 0.
+    pub fn next_case(&mut self) {
+        self.case += 1;
+        self.input = 0;
+    }
+
+    /// Advance to the next input.
+    pub fn next_input(&mut self) {
+        self.input += 1;
+    }
+}

crates/solc-binaries/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "revive-dt-solc-binaries"
+description = "Download and cache solc binaries"
+version.workspace = true
+authors.workspace = true
+license.workspace = true
+edition.workspace = true
+repository.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+revive-dt-common = { workspace = true }
+
+anyhow = { workspace = true }
+hex = { workspace = true }
+tracing = { workspace = true }
+tokio = { workspace = true }
+reqwest = { workspace = true }
+semver = { workspace = true }
+serde = { workspace = true }
+sha2 = { workspace = true }

crates/solc-binaries/src/cache.rs

@@ -0,0 +1,73 @@
+//! Helper for caching the solc binaries.
+
+use std::{
+    collections::HashSet,
+    fs::{File, create_dir_all},
+    io::{BufWriter, Write},
+    os::unix::fs::PermissionsExt,
+    path::{Path, PathBuf},
+    sync::LazyLock,
+};
+
+use tokio::sync::Mutex;
+
+use crate::download::SolcDownloader;
+
+pub const SOLC_CACHE_DIRECTORY: &str = "solc";
+pub(crate) static SOLC_CACHER: LazyLock<Mutex<HashSet<PathBuf>>> = LazyLock::new(Default::default);
+
+pub(crate) async fn get_or_download(
+    working_directory: &Path,
+    downloader: &SolcDownloader,
+) -> anyhow::Result<PathBuf> {
+    let target_directory = working_directory
+        .join(SOLC_CACHE_DIRECTORY)
+        .join(downloader.version.to_string());
+    let target_file = target_directory.join(downloader.target);
+
+    let mut cache = SOLC_CACHER.lock().await;
+    if cache.contains(&target_file) {
+        tracing::debug!("using cached solc: {}", target_file.display());
+        return Ok(target_file);
+    }
+
+    create_dir_all(target_directory)?;
+    download_to_file(&target_file, downloader).await?;
+    cache.insert(target_file.clone());
+
+    Ok(target_file)
+}
+
+async fn download_to_file(path: &Path, downloader: &SolcDownloader) -> anyhow::Result<()> {
+    tracing::info!("caching file: {}", path.display());
+
+    let Ok(file) = File::create_new(path) else {
+        tracing::debug!("cache file already exists: {}", path.display());
+        return Ok(());
+    };
+
+    #[cfg(unix)]
+    {
+        let mut permissions = file.metadata()?.permissions();
+        permissions.set_mode(permissions.mode() | 0o111);
+        file.set_permissions(permissions)?;
+    }
+
+    let mut file = BufWriter::new(file);
+    file.write_all(&downloader.download().await?)?;
+    file.flush()?;
+    drop(file);
+
+    #[cfg(target_os = "macos")]
+    std::process::Command::new("xattr")
+        .arg("-d")
+        .arg("com.apple.quarantine")
+        .arg(path)
+        .stderr(std::process::Stdio::null())
+        .stdout(std::process::Stdio::null())
+        .stdout(std::process::Stdio::null())
+        .spawn()?
+        .wait()?;
+
+    Ok(())
+}

crates/solc-binaries/src/download.rs

@@ -0,0 +1,191 @@
+//! This module downloads solc binaries.
+
+use std::{
+    collections::HashMap,
+    sync::{LazyLock, Mutex},
+};
+
+use revive_dt_common::types::VersionOrRequirement;
+
+use semver::Version;
+use sha2::{Digest, Sha256};
+
+use crate::list::List;
+
+pub static LIST_CACHE: LazyLock<Mutex<HashMap<&'static str, List>>> =
+    LazyLock::new(Default::default);
+
+impl List {
+    pub const LINUX_URL: &str = "https://binaries.soliditylang.org/linux-amd64/list.json";
+    pub const WINDOWS_URL: &str = "https://binaries.soliditylang.org/windows-amd64/list.json";
+    pub const MACOSX_URL: &str = "https://binaries.soliditylang.org/macosx-amd64/list.json";
+    pub const WASM_URL: &str = "https://binaries.soliditylang.org/wasm/list.json";
+
+    /// Try to downloads the list from the given URL.
+    ///
+    /// Caches the list retrieved from the `url` into [LIST_CACHE],
+    /// subsequent calls with the same `url` will return the cached list.
+    pub async fn download(url: &'static str) -> anyhow::Result<Self> {
+        if let Some(list) = LIST_CACHE.lock().unwrap().get(url) {
+            return Ok(list.clone());
+        }
+
+        let body: List = reqwest::get(url).await?.json().await?;
+
+        LIST_CACHE.lock().unwrap().insert(url, body.clone());
+
+        Ok(body)
+    }
+}
+
+/// Download solc binaries from the official SolidityLang site
+#[derive(Clone, Debug)]
+pub struct SolcDownloader {
+    pub version: Version,
+    pub target: &'static str,
+    pub list: &'static str,
+}
+
+impl SolcDownloader {
+    pub const BASE_URL: &str = "https://binaries.soliditylang.org";
+
+    pub const LINUX_NAME: &str = "linux-amd64";
+    pub const MACOSX_NAME: &str = "macosx-amd64";
+    pub const WINDOWS_NAME: &str = "windows-amd64";
+    pub const WASM_NAME: &str = "wasm";
+
+    async fn new(
+        version: impl Into<VersionOrRequirement>,
+        target: &'static str,
+        list: &'static str,
+    ) -> anyhow::Result<Self> {
+        let version_or_requirement = version.into();
+        match version_or_requirement {
+            VersionOrRequirement::Version(version) => Ok(Self {
+                version,
+                target,
+                list,
+            }),
+            VersionOrRequirement::Requirement(requirement) => {
+                let Some(version) = List::download(list)
+                    .await?
+                    .builds
+                    .into_iter()
+                    .map(|build| build.version)
+                    .filter(|version| requirement.matches(version))
+                    .max()
+                else {
+                    anyhow::bail!("Failed to find a version that satisfies {requirement:?}");
+                };
+                Ok(Self {
+                    version,
+                    target,
+                    list,
+                })
+            }
+        }
+    }
+
+    pub async fn linux(version: impl Into<VersionOrRequirement>) -> anyhow::Result<Self> {
+        Self::new(version, Self::LINUX_NAME, List::LINUX_URL).await
+    }
+
+    pub async fn macosx(version: impl Into<VersionOrRequirement>) -> anyhow::Result<Self> {
+        Self::new(version, Self::MACOSX_NAME, List::MACOSX_URL).await
+    }
+
+    pub async fn windows(version: impl Into<VersionOrRequirement>) -> anyhow::Result<Self> {
+        Self::new(version, Self::WINDOWS_NAME, List::WINDOWS_URL).await
+    }
+
+    pub async fn wasm(version: impl Into<VersionOrRequirement>) -> anyhow::Result<Self> {
+        Self::new(version, Self::WASM_NAME, List::WASM_URL).await
+    }
+
+    /// Download the solc binary.
+    ///
+    /// Errors out if the download fails or the digest of the downloaded file
+    /// mismatches the expected digest from the release [List].
+    pub async fn download(&self) -> anyhow::Result<Vec<u8>> {
+        tracing::info!("downloading solc: {self:?}");
+        let builds = List::download(self.list).await?.builds;
+        let build = builds
+            .iter()
+            .find(|build| build.version == self.version)
+            .ok_or_else(|| anyhow::anyhow!("solc v{} not found builds", self.version))?;
+
+        let path = build.path.clone();
+        let expected_digest = build
+            .sha256
+            .strip_prefix("0x")
+            .unwrap_or(&build.sha256)
+            .to_string();
+        let url = format!("{}/{}/{}", Self::BASE_URL, self.target, path.display());
+
+        let file = reqwest::get(url).await?.bytes().await?.to_vec();
+
+        if hex::encode(Sha256::digest(&file)) != expected_digest {
+            anyhow::bail!("sha256 mismatch for solc version {}", self.version);
+        }
+
+        Ok(file)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::{download::SolcDownloader, list::List};
+
+    #[tokio::test]
+    async fn try_get_windows() {
+        let version = List::download(List::WINDOWS_URL)
+            .await
+            .unwrap()
+            .latest_release;
+        SolcDownloader::windows(version)
+            .await
+            .unwrap()
+            .download()
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn try_get_macosx() {
+        let version = List::download(List::MACOSX_URL)
+            .await
+            .unwrap()
+            .latest_release;
+        SolcDownloader::macosx(version)
+            .await
+            .unwrap()
+            .download()
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn try_get_linux() {
+        let version = List::download(List::LINUX_URL)
+            .await
+            .unwrap()
+            .latest_release;
+        SolcDownloader::linux(version)
+            .await
+            .unwrap()
+            .download()
+            .await
+            .unwrap();
+    }
+
+    #[tokio::test]
+    async fn try_get_wasm() {
+        let version = List::download(List::WASM_URL).await.unwrap().latest_release;
+        SolcDownloader::wasm(version)
+            .await
+            .unwrap()
+            .download()
+            .await
+            .unwrap();
+    }
+}

crates/solc-binaries/src/lib.rs

@@ -0,0 +1,40 @@
+//! This crates provides serializable Rust type definitions for the [solc binary lists][0]
+//! and download helpers.
+//!
+//! [0]: https://binaries.soliditylang.org
+
+use std::path::{Path, PathBuf};
+
+use cache::get_or_download;
+use download::SolcDownloader;
+
+use revive_dt_common::types::VersionOrRequirement;
+
+pub mod cache;
+pub mod download;
+pub mod list;
+
+/// Downloads the solc binary for Wasm is `wasm` is set, otherwise for
+/// the target platform.
+///
+/// Subsequent calls for the same version will use a cached artifact
+/// and not download it again.
+pub async fn download_solc(
+    cache_directory: &Path,
+    version: impl Into<VersionOrRequirement>,
+    wasm: bool,
+) -> anyhow::Result<PathBuf> {
+    let downloader = if wasm {
+        SolcDownloader::wasm(version).await
+    } else if cfg!(target_os = "linux") {
+        SolcDownloader::linux(version).await
+    } else if cfg!(target_os = "macos") {
+        SolcDownloader::macosx(version).await
+    } else if cfg!(target_os = "windows") {
+        SolcDownloader::windows(version).await
+    } else {
+        unimplemented!()
+    }?;
+
+    get_or_download(cache_directory, &downloader).await
+}

crates/solc-binaries/src/list.rs

@@ -0,0 +1,26 @@
+//! Rust type definitions for the solc binary lists.
+
+use std::{collections::HashMap, path::PathBuf};
+
+use semver::Version;
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize, Clone, Eq, PartialEq)]
+pub struct List {
+    pub builds: Vec<Build>,
+    pub releases: HashMap<Version, String>,
+    #[serde(rename = "latestRelease")]
+    pub latest_release: Version,
+}
+
+#[derive(Debug, Deserialize, Clone, Eq, PartialEq)]
+pub struct Build {
+    pub path: PathBuf,
+    pub version: Version,
+    pub build: String,
+    #[serde(rename = "longVersion")]
+    pub long_version: String,
+    pub keccak256: String,
+    pub sha256: String,
+    pub urls: Vec<String>,
+}

genesis.json

@@ -0,0 +1,37 @@
+{
+    "config": {
+        "chainId": 420420420,
+        "homesteadBlock": 0,
+        "eip150Block": 0,
+        "eip155Block": 0,
+        "eip158Block": 0,
+        "byzantiumBlock": 0,
+        "constantinopleBlock": 0,
+        "petersburgBlock": 0,
+        "istanbulBlock": 0,
+        "berlinBlock": 0,
+        "londonBlock": 0,
+        "arrowGlacierBlock": 0,
+        "grayGlacierBlock": 0,
+        "shanghaiTime": 0,
+        "cancunTime": 0,
+        "terminalTotalDifficulty": 0,
+        "terminalTotalDifficultyPassed": true,
+        "blobSchedule": {
+            "cancun": {
+                "target": 3,
+                "max": 6,
+                "baseFeeUpdateFraction": 3338477
+            }
+        }
+    },
+    "coinbase": "0xffffffffffffffffffffffffffffffffffffffff",
+    "difficulty": "0x00",
+    "extraData": "",
+    "gasLimit": "0xffffffff",
+    "nonce": "0x0000000000000042",
+    "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "timestamp": "0x00",
+    "alloc": {}
+}