Fix tests

Implement caller replacement

Cargo.lock

@@ -67,9 +67,9 @@ checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
 
 [[package]]
 name = "alloy"
-version = "1.0.20"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae58d888221eecf621595e2096836ce7cfc37be06bfa39d7f64aa6a3ea4c9e5b"
+checksum = "8ad4eb51e7845257b70c51b38ef8d842d5e5e93196701fcbd757577971a043c6"
 dependencies = [
  "alloy-consensus",
  "alloy-contract",
@@ -102,15 +102,16 @@ dependencies = [
 
 [[package]]
 name = "alloy-consensus"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad451f9a70c341d951bca4e811d74dbe1e193897acd17e9dbac1353698cc430b"
+checksum = "ca3b746060277f3d7f9c36903bb39b593a741cb7afcb0044164c28f0e9b673f0"
 dependencies = [
  "alloy-eips",
  "alloy-primitives",
  "alloy-rlp",
  "alloy-serde",
  "alloy-trie",
+ "alloy-tx-macros",
  "auto_impl",
  "c-kzg",
  "derive_more 2.0.1",
@@ -126,9 +127,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-consensus-any"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "142daffb15d5be1a2b20d2cd540edbcef03037b55d4ff69dc06beb4d06286dba"
+checksum = "bf98679329fa708fa809ea596db6d974da892b068ad45e48ac1956f582edf946"
 dependencies = [
  "alloy-consensus",
  "alloy-eips",
@@ -140,9 +141,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-contract"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebf25443920ecb9728cb087fe4dc04a0b290bd6ac85638c58fe94aba70f1a44e"
+checksum = "a10e47f5305ea08c37b1772086c1573e9a0a257227143996841172d37d3831bb"
 dependencies = [
  "alloy-consensus",
  "alloy-dyn-abi",
@@ -157,6 +158,7 @@ dependencies = [
  "alloy-transport",
  "futures",
  "futures-util",
+ "serde_json",
  "thiserror 2.0.12",
 ]
 
@@ -227,9 +229,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-eips"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3056872f6da48046913e76edb5ddced272861f6032f09461aea1a2497be5ae5d"
+checksum = "f562a81278a3ed83290e68361f2d1c75d018ae3b8589a314faf9303883e18ec9"
 dependencies = [
  "alloy-eip2124",
  "alloy-eip2930",
@@ -247,15 +249,16 @@ dependencies = [
 
 [[package]]
 name = "alloy-genesis"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c98fb40f07997529235cc474de814cd7bd9de561e101716289095696c0e4639d"
+checksum = "dc41384e9ab8c9b2fb387c52774d9d432656a28edcda1c2d4083e96051524518"
 dependencies = [
  "alloy-eips",
  "alloy-primitives",
  "alloy-serde",
  "alloy-trie",
  "serde",
+ "serde_with",
 ]
 
 [[package]]
@@ -272,12 +275,13 @@ dependencies = [
 
 [[package]]
 name = "alloy-json-rpc"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc08b31ebf9273839bd9a01f9333cbb7a3abb4e820c312ade349dd18bdc79581"
+checksum = "12c454fcfcd5d26ed3b8cae5933cbee9da5f0b05df19b46d4bd4446d1f082565"
 dependencies = [
  "alloy-primitives",
  "alloy-sol-types",
+ "http",
  "serde",
  "serde_json",
  "thiserror 2.0.12",
@@ -286,9 +290,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-network"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed117b08f0cc190312bf0c38c34cf4f0dabfb4ea8f330071c587cd7160a88cb2"
+checksum = "42d6d39eabe5c7b3d8f23ac47b0b683b99faa4359797114636c66e0743103d05"
 dependencies = [
  "alloy-consensus",
  "alloy-consensus-any",
@@ -312,9 +316,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-network-primitives"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c7162ff7be8649c0c391f4e248d1273e85c62076703a1f3ec7daf76b283d886d"
+checksum = "3704fa8b7ba9ba3f378d99b3d628c8bc8c2fc431b709947930f154e22a8368b6"
 dependencies = [
  "alloy-consensus",
  "alloy-eips",
@@ -336,13 +340,13 @@ dependencies = [
  "derive_more 2.0.1",
  "foldhash",
  "hashbrown 0.15.3",
- "indexmap 2.9.0",
+ "indexmap 2.10.0",
  "itoa",
  "k256",
  "keccak-asm",
  "paste",
  "proptest",
- "rand 0.9.1",
+ "rand 0.9.2",
  "ruint",
  "rustc-hash",
  "serde",
@@ -352,9 +356,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-provider"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d84eba1fd8b6fe8b02f2acd5dd7033d0f179e304bd722d11e817db570d1fa6c4"
+checksum = "08800e8cbe70c19e2eb7cf3d7ff4b28bdd9b3933f8e1c8136c7d910617ba03bf"
 dependencies = [
  "alloy-chains",
  "alloy-consensus",
@@ -380,6 +384,7 @@ dependencies = [
  "either",
  "futures",
  "futures-utils-wasm",
+ "http",
  "lru",
  "parking_lot",
  "pin-project",
@@ -395,9 +400,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-pubsub"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8550f7306e0230fc835eb2ff4af0a96362db4b6fc3f25767d161e0ad0ac765bf"
+checksum = "ae68457a2c2ead6bd7d7acb5bf5f1623324b1962d4f8e7b0250657a3c3ab0a0b"
 dependencies = [
  "alloy-json-rpc",
  "alloy-primitives",
@@ -438,9 +443,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-rpc-client"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "518a699422a3eab800f3dac2130d8f2edba8e4fff267b27a9c7dc6a2b0d313ee"
+checksum = "162301b5a57d4d8f000bf30f4dcb82f9f468f3e5e846eeb8598dd39e7886932c"
 dependencies = [
  "alloy-json-rpc",
  "alloy-primitives",
@@ -448,7 +453,6 @@ dependencies = [
  "alloy-transport",
  "alloy-transport-http",
  "alloy-transport-ipc",
- "async-stream",
  "futures",
  "pin-project",
  "reqwest",
@@ -458,16 +462,15 @@ dependencies = [
  "tokio-stream",
  "tower",
  "tracing",
- "tracing-futures",
  "url",
  "wasmtimer",
 ]
 
 [[package]]
 name = "alloy-rpc-types"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c000cab4ec26a4b3e29d144e999e1c539c2fa0abed871bf90311eb3466187ca8"
+checksum = "6cd8ca94ae7e2b32cc3895d9981f3772aab0b4756aa60e9ed0bcfee50f0e1328"
 dependencies = [
  "alloy-primitives",
  "alloy-rpc-types-eth",
@@ -478,9 +481,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-rpc-types-any"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "508b2fbe66d952089aa694e53802327798806498cd29ff88c75135770ecaabfc"
+checksum = "076b47e834b367d8618c52dd0a0d6a711ddf66154636df394805300af4923b8a"
 dependencies = [
  "alloy-consensus-any",
  "alloy-rpc-types-eth",
@@ -489,9 +492,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-rpc-types-debug"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c832f2e851801093928dbb4b7bd83cd22270faf76b2e080646b806a285c8757"
+checksum = "94a2a86ad7b7d718c15e79d0779bd255561b6b22968dc5ed2e7c0fbc43bb55fe"
 dependencies = [
  "alloy-primitives",
  "serde",
@@ -499,9 +502,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-rpc-types-eth"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fcaf7dff0fdd756a714d58014f4f8354a1706ebf9fa2cf73431e0aeec3c9431e"
+checksum = "2c2f847e635ec0be819d06e2ada4bcc4e4204026a83c4bfd78ae8d550e027ae7"
 dependencies = [
  "alloy-consensus",
  "alloy-consensus-any",
@@ -514,14 +517,15 @@ dependencies = [
  "itertools 0.14.0",
  "serde",
  "serde_json",
+ "serde_with",
  "thiserror 2.0.12",
 ]
 
 [[package]]
 name = "alloy-rpc-types-trace"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e3507a04e868dd83219ad3cd6a8c58aefccb64d33f426b3934423a206343e84"
+checksum = "6fc58180302a94c934d455eeedb3ecb99cdc93da1dbddcdbbdb79dd6fe618b2a"
 dependencies = [
  "alloy-primitives",
  "alloy-rpc-types-eth",
@@ -533,9 +537,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-serde"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "730e8f2edf2fc224cabd1c25d090e1655fa6137b2e409f92e5eec735903f1507"
+checksum = "ae699248d02ade9db493bbdae61822277dc14ae0f82a5a4153203b60e34422a6"
 dependencies = [
  "alloy-primitives",
  "serde",
@@ -544,9 +548,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-signer"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b0d2428445ec13edc711909e023d7779618504c4800be055a5b940025dbafe3"
+checksum = "3cf7d793c813515e2b627b19a15693960b3ed06670f9f66759396d06ebe5747b"
 dependencies = [
  "alloy-primitives",
  "async-trait",
@@ -559,9 +563,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-signer-local"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e14fe6fedb7fe6e0dfae47fe020684f1d8e063274ef14bca387ddb7a6efa8ec1"
+checksum = "51a424bc5a11df0d898ce0fd15906b88ebe2a6e4f17a514b51bc93946bb756bd"
 dependencies = [
  "alloy-consensus",
  "alloy-network",
@@ -597,7 +601,7 @@ dependencies = [
  "alloy-sol-macro-input",
  "const-hex",
  "heck",
- "indexmap 2.9.0",
+ "indexmap 2.10.0",
  "proc-macro-error2",
  "proc-macro2",
  "quote",
@@ -648,9 +652,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-transport"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a712bdfeff42401a7dd9518f72f617574c36226a9b5414537fedc34350b73bf9"
+checksum = "4f317d20f047b3de4d9728c556e2e9a92c9a507702d2016424cd8be13a74ca5e"
 dependencies = [
  "alloy-json-rpc",
  "alloy-primitives",
@@ -671,9 +675,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-transport-http"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ea5a76d7f2572174a382aedf36875bedf60bcc41116c9f031cf08040703a2dc"
+checksum = "ff084ac7b1f318c87b579d221f11b748341d68b9ddaa4ffca5e62ed2b8cfefb4"
 dependencies = [
  "alloy-json-rpc",
  "alloy-transport",
@@ -686,9 +690,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-transport-ipc"
-version = "1.0.9"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "606af17a7e064d219746f6d2625676122c79d78bf73dfe746d6db9ecd7dbcb85"
+checksum = "edb099cdad8ed2e6a80811cdf9bbf715ebf4e34c981b4a6e2d1f9daacbf8b218"
 dependencies = [
  "alloy-json-rpc",
  "alloy-pubsub",
@@ -706,9 +710,9 @@ dependencies = [
 
 [[package]]
 name = "alloy-trie"
-version = "0.8.1"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "983d99aa81f586cef9dae38443245e585840fcf0fc58b09aee0b1f27aed1d500"
+checksum = "bada1fc392a33665de0dc50d401a3701b62583c655e3522a323490a5da016962"
 dependencies = [
  "alloy-primitives",
  "alloy-rlp",
@@ -720,6 +724,19 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "alloy-tx-macros"
+version = "1.0.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1154c8187a5ff985c95a8b2daa2fedcf778b17d7668e5e50e556c4ff9c881154"
+dependencies = [
+ "alloy-primitives",
+ "darling",
+ "proc-macro2",
+ "quote",
+ "syn 2.0.101",
+]
+
 [[package]]
 name = "android-tzdata"
 version = "0.1.1"
@@ -2400,7 +2417,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "http",
- "indexmap 2.9.0",
+ "indexmap 2.10.0",
  "slab",
  "tokio",
  "tokio-util",
@@ -2842,9 +2859,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.9.0"
+version = "2.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cea70ddb795996207ad57735b50c5982d8844f38ba9ee5f1aedcfb708a2aa11e"
+checksum = "fe4cd85333e22411419a0bcae1297d25e58c9443848b11dc6a86fefe8c78a661"
 dependencies = [
  "equivalent",
  "hashbrown 0.15.3",
@@ -3268,13 +3285,14 @@ dependencies = [
 
 [[package]]
 name = "nybbles"
-version = "0.3.4"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8983bb634df7248924ee0c4c3a749609b5abcb082c28fffe3254b3eb3602b307"
+checksum = "675b3a54e5b12af997abc8b6638b0aee51a28caedab70d4967e0d5db3a3f1d06"
 dependencies = [
  "alloy-rlp",
- "const-hex",
+ "cfg-if",
  "proptest",
+ "ruint",
  "serde",
  "smallvec",
 ]
@@ -3719,9 +3737,9 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.9.1"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fbfd9d094a40bf3ae768db9361049ace4c0e04a4fd6b359518bd7b73a73dd97"
+checksum = "6db2770f06117d490610c7488547d543617b21bfa07796d7a12f6f1bd53850d1"
 dependencies = [
  "rand_chacha 0.9.0",
  "rand_core 0.9.3",
@@ -3962,6 +3980,7 @@ dependencies = [
  "alloy",
  "anyhow",
  "clap",
+ "indexmap 2.10.0",
  "rayon",
  "revive-dt-compiler",
  "revive-dt-config",
@@ -3984,6 +4003,7 @@ dependencies = [
  "alloy-primitives",
  "alloy-sol-types",
  "anyhow",
+ "revive-dt-node-interaction",
  "semver 1.0.26",
  "serde",
  "serde_json",
@@ -4013,6 +4033,7 @@ version = "0.1.0"
 dependencies = [
  "alloy",
  "anyhow",
+ "futures",
  "once_cell",
  "tokio",
  "tracing",
@@ -4110,7 +4131,7 @@ dependencies = [
  "primitive-types 0.12.2",
  "proptest",
  "rand 0.8.5",
- "rand 0.9.1",
+ "rand 0.9.2",
  "rlp",
  "ruint-macro",
  "serde",
@@ -4505,7 +4526,7 @@ dependencies = [
  "chrono",
  "hex",
  "indexmap 1.9.3",
- "indexmap 2.9.0",
+ "indexmap 2.10.0",
  "serde",
  "serde_derive",
  "serde_json",
@@ -5394,7 +5415,7 @@ version = "0.22.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "310068873db2c5b3e7659d2cc35d21855dbafa50d1ce336397c666e3cb08137e"
 dependencies = [
- "indexmap 2.9.0",
+ "indexmap 2.10.0",
  "serde",
  "serde_spanned",
  "toml_datetime",
@@ -5486,18 +5507,6 @@ dependencies = [
  "valuable",
 ]
 
-[[package]]
-name = "tracing-futures"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
-dependencies = [
- "futures",
- "futures-task",
- "pin-project",
- "tracing",
-]
-
 [[package]]
 name = "tracing-log"
 version = "0.2.0"

Cargo.toml

@@ -25,6 +25,7 @@ alloy-primitives = "1.2.1"
 alloy-sol-types = "1.2.1"
 anyhow = "1.0"
 clap = { version = "4", features = ["derive"] }
+futures = { version = "0.3.31" }
 hex = "0.4.3"
 reqwest = { version = "0.12.15", features = ["blocking", "json"] }
 once_cell = "1.21"
@@ -50,6 +51,7 @@ tracing-subscriber = { version = "0.3.19", default-features = false, features =
     "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" }
@@ -57,7 +59,7 @@ revive-common = { git = "https://github.com/paritytech/revive", rev = "3389865af
 revive-differential = { git = "https://github.com/paritytech/revive", rev = "3389865af7c3ff6f29a586d82157e8bc573c1a8e" }
 
 [workspace.dependencies.alloy]
-version = "1.0"
+version = "1.0.22"
 default-features = false
 features = [
     "json-abi",
@@ -71,6 +73,7 @@ features = [
     "network",
     "serde",
     "rpc-types-eth",
+    "genesis",
 ]
 
 [profile.bench]

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/compiler/src/lib.rs

@@ -44,9 +44,12 @@ pub trait SolidityCompiler {
 pub struct CompilerInput<T: PartialEq + Eq + Hash> {
     pub extra_options: T,
     pub input: SolcStandardJsonInput,
+    pub allow_paths: Vec<PathBuf>,
+    pub base_path: Option<PathBuf>,
 }
 
 /// The generic compilation output configuration.
+#[derive(Debug)]
 pub struct CompilerOutput<T: PartialEq + Eq + Hash> {
     /// The solc standard JSON input.
     pub input: CompilerInput<T>,
@@ -83,8 +86,8 @@ where
 pub struct Compiler<T: SolidityCompiler> {
     input: SolcStandardJsonInput,
     extra_options: T::Options,
-    allow_paths: Vec<String>,
+    allow_paths: Vec<PathBuf>,
-    base_path: Option<String>,
+    base_path: Option<PathBuf>,
 }
 
 impl Default for Compiler<solc::Solc> {
@@ -145,12 +148,12 @@ where
         self
     }
 
-    pub fn allow_path(mut self, path: String) -> Self {
+    pub fn allow_path(mut self, path: PathBuf) -> Self {
         self.allow_paths.push(path);
         self
     }
 
-    pub fn base_path(mut self, base_path: String) -> Self {
+    pub fn base_path(mut self, base_path: PathBuf) -> Self {
         self.base_path = Some(base_path);
         self
     }
@@ -159,6 +162,8 @@ where
         T::new(solc_path).build(CompilerInput {
             extra_options: self.extra_options,
             input: self.input,
+            allow_paths: self.allow_paths,
+            base_path: self.base_path,
         })
     }
 

crates/compiler/src/revive_resolc.rs

@@ -11,6 +11,7 @@ use revive_dt_config::Arguments;
 use revive_solc_json_interface::SolcStandardJsonOutput;
 
 /// A wrapper around the `resolc` binary, emitting PVM-compatible bytecode.
+#[derive(Debug)]
 pub struct Resolc {
     /// Path to the `resolc` executable
     resolc_path: PathBuf,
@@ -19,17 +20,32 @@ pub struct Resolc {
 impl SolidityCompiler for Resolc {
     type Options = Vec<String>;
 
+    #[tracing::instrument(level = "debug", ret)]
     fn build(
         &self,
         input: CompilerInput<Self::Options>,
     ) -> anyhow::Result<CompilerOutput<Self::Options>> {
-        let mut child = Command::new(&self.resolc_path)
+        let mut command = Command::new(&self.resolc_path);
-            .arg("--standard-json")
+        command
-            .args(&input.extra_options)
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .stderr(Stdio::piped())
-            .spawn()?;
+            .arg("--standard-json");
+
+        if let Some(ref base_path) = input.base_path {
+            command.arg("--base-path").arg(base_path);
+        }
+        if !input.allow_paths.is_empty() {
+            command.arg("--allow-paths").arg(
+                input
+                    .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");
         serde_json::to_writer(stdin_pipe, &input.input)?;
@@ -55,12 +71,64 @@ impl SolidityCompiler for Resolc {
             });
         }
 
-        let parsed: SolcStandardJsonOutput = serde_json::from_slice(&stdout).map_err(|e| {
+        let mut parsed =
-            anyhow::anyhow!(
+            serde_json::from_slice::<SolcStandardJsonOutput>(&stdout).map_err(|e| {
-                "failed to parse resolc JSON output: {e}\nstderr: {}",
+                anyhow::anyhow!(
-                String::from_utf8_lossy(&stderr)
+                    "failed to parse resolc JSON output: {e}\nstderr: {}",
-            )
+                    String::from_utf8_lossy(&stderr)
-        })?;
+                )
+            })?;
+
+        // 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, "Encountered an error in the compilation");
+                anyhow::bail!("Encountered an error in the compilation: {error}")
+            }
+        }
+
+        // We need to do some post processing on the output to make it in the same format that solc
+        // outputs. More specifically, for each contract, the `.metadata` field should be replaced
+        // with the `.metadata.solc_metadata` field which contains the ABI and other information
+        // about the compiled contracts. We do this because we do not want any downstream logic to
+        // need to differentiate between which compiler is being used when extracting the ABI of the
+        // contracts.
+        if let Some(ref mut contracts) = parsed.contracts {
+            for (contract_path, contracts_map) in contracts.iter_mut() {
+                for (contract_name, contract_info) in contracts_map.iter_mut() {
+                    let Some(metadata) = contract_info.metadata.take() else {
+                        continue;
+                    };
+
+                    // Get the `solc_metadata` in the metadata of the contract.
+                    let Some(solc_metadata) = metadata
+                        .get("solc_metadata")
+                        .and_then(|metadata| metadata.as_str())
+                    else {
+                        tracing::error!(
+                            contract_path,
+                            contract_name,
+                            metadata = serde_json::to_string(&metadata).unwrap(),
+                            "Encountered a contract compiled with resolc that has no solc_metadata"
+                        );
+                        anyhow::bail!(
+                            "Contract {} compiled with resolc that has no solc_metadata",
+                            contract_name
+                        );
+                    };
+
+                    // Replace the original metadata with the new solc_metadata.
+                    contract_info.metadata =
+                        Some(serde_json::Value::String(solc_metadata.to_string()));
+                }
+            }
+        }
+
+        tracing::debug!(
+            output = %serde_json::to_string(&parsed).unwrap(),
+            "Compiled successfully"
+        );
 
         Ok(CompilerOutput {
             input,

crates/compiler/src/solc.rs

@@ -9,7 +9,9 @@ use std::{
 use crate::{CompilerInput, CompilerOutput, SolidityCompiler};
 use revive_dt_config::Arguments;
 use revive_dt_solc_binaries::download_solc;
+use revive_solc_json_interface::SolcStandardJsonOutput;
 
+#[derive(Debug)]
 pub struct Solc {
     solc_path: PathBuf,
 }
@@ -17,16 +19,32 @@ pub struct Solc {
 impl SolidityCompiler for Solc {
     type Options = ();
 
+    #[tracing::instrument(level = "debug", ret)]
     fn build(
         &self,
         input: CompilerInput<Self::Options>,
     ) -> anyhow::Result<CompilerOutput<Self::Options>> {
-        let mut child = Command::new(&self.solc_path)
+        let mut command = Command::new(&self.solc_path);
+        command
             .stdin(Stdio::piped())
             .stdout(Stdio::piped())
             .stderr(Stdio::piped())
-            .arg("--standard-json")
+            .arg("--standard-json");
-            .spawn()?;
+
+        if let Some(ref base_path) = input.base_path {
+            command.arg("--base-path").arg(base_path);
+        }
+        if !input.allow_paths.is_empty() {
+            command.arg("--allow-paths").arg(
+                input
+                    .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");
         serde_json::to_writer(stdin, &input.input)?;
@@ -42,9 +60,31 @@ impl SolidityCompiler for Solc {
             });
         }
 
+        let parsed =
+            serde_json::from_slice::<SolcStandardJsonOutput>(&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().flatten() {
+            if error.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"
+        );
+
         Ok(CompilerOutput {
             input,
-            output: serde_json::from_slice(&output.stdout)?,
+            output: parsed,
             error: None,
         })
     }

crates/config/src/lib.rs

@@ -73,6 +73,12 @@ pub struct Arguments {
     )]
     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 = 30)]
+    pub private_keys_to_add: usize,
+
     /// The differential testing leader node implementation.
     #[arg(short, long = "leader", default_value = "geth")]
     pub leader: TestingPlatform,

crates/core/Cargo.toml

@@ -23,6 +23,7 @@ revive-dt-report = { workspace = true }
 alloy = { workspace = true }
 anyhow = { workspace = true }
 clap = { workspace = true }
+indexmap = { workspace = true }
 tracing = { workspace = true }
 tracing-subscriber = { workspace = true }
 rayon = { workspace = true }

crates/core/src/common.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/core/src/lib.rs

@@ -1,20 +1,21 @@
 //! The revive differential testing core library.
 //!
 //! This crate defines the testing configuration and
-//! provides a helper utilty to execute tests.
+//! provides a helper utility to execute tests.
 
 use revive_dt_compiler::{SolidityCompiler, revive_resolc, solc};
 use revive_dt_config::TestingPlatform;
-use revive_dt_node::{geth, kitchensink::KitchensinkNode};
+use revive_dt_node::{Node, geth, kitchensink::KitchensinkNode};
 use revive_dt_node_interaction::EthereumNode;
 
+pub mod common;
 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;
+    type Blockchain: EthereumNode + Node;
     type Compiler: SolidityCompiler;
 
     /// Returns the matching [TestingPlatform] of the [revive_dt_config::Arguments].

crates/core/src/main.rs

@@ -13,7 +13,7 @@ use revive_dt_node::pool::NodePool;
 use revive_dt_report::reporter::{Report, Span};
 use temp_dir::TempDir;
 use tracing::Level;
-use tracing_subscriber::{EnvFilter, FmtSubscriber, fmt::format::FmtSpan};
+use tracing_subscriber::{EnvFilter, FmtSubscriber};
 
 static TEMP_DIR: LazyLock<TempDir> = LazyLock::new(|| TempDir::new().unwrap());
 
@@ -39,7 +39,7 @@ fn init_cli() -> anyhow::Result<Arguments> {
         .with_thread_ids(true)
         .with_thread_names(true)
         .with_env_filter(EnvFilter::from_default_env())
-        .with_span_events(FmtSpan::ENTER | FmtSpan::CLOSE)
+        .with_ansi(false)
         .pretty()
         .finish();
     tracing::subscriber::set_global_default(subscriber)?;
@@ -116,20 +116,25 @@ where
                 follower_nodes.round_robbin(),
             );
 
-            match driver.execute(span) {
+            let execution_result = driver.execute(span);
-                Ok(_) => {
+            tracing::info!(
-                    tracing::info!(
+                case_success_count = execution_result.successful_cases_count,
-                        "metadata {} success",
+                case_failure_count = execution_result.failed_cases_count,
-                        metadata.directory().as_ref().unwrap().display()
+                "Execution completed"
-                    );
+            );
-                }
+
-                Err(error) => {
+            let mut error_count = 0;
-                    tracing::warn!(
+            for result in execution_result.results.iter() {
-                        "metadata {} failure: {error:?}",
+                if !result.is_success() {
-                        metadata.file_path.as_ref().unwrap().display()
+                    tracing::error!(execution_error = ?result, "Encountered an error");
-                    );
+                    error_count += 1;
                 }
             }
+            if error_count == 0 {
+                tracing::info!("Execution succeeded");
+            } else {
+                tracing::info!("Execution failed");
+            }
         },
     );
 

crates/format/Cargo.toml

@@ -9,6 +9,8 @@ repository.workspace = true
 rust-version.workspace = true
 
 [dependencies]
+revive-dt-node-interaction = { workspace = true }
+
 alloy = { workspace = true }
 alloy-primitives = { workspace = true }
 alloy-sol-types = { workspace = true }

crates/format/src/case.rs

@@ -1,6 +1,10 @@
 use serde::Deserialize;
 
-use crate::{input::Input, mode::Mode};
+use crate::{
+    define_wrapper_type,
+    input::{Expected, Input},
+    mode::Mode,
+};
 
 #[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
 pub struct Case {
@@ -9,4 +13,37 @@ pub struct Case {
     pub modes: Option<Vec<Mode>>,
     pub inputs: Vec<Input>,
     pub group: Option<String>,
+    pub expected: Option<Expected>,
 }
+
+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)]
+    CaseIdx(usize);
+);

crates/format/src/lib.rs

@@ -3,5 +3,6 @@
 pub mod case;
 pub mod corpus;
 pub mod input;
+pub mod macros;
 pub mod metadata;
 pub mod mode;

crates/format/src/macros.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>>
+/// }
+/// ```
+#[macro_export]
+macro_rules! define_wrapper_type {
+    (
+        $(#[$meta: meta])*
+        $ident: ident($ty: ty) $(;)?
+    ) => {
+        $(#[$meta])*
+        pub struct $ident($ty);
+
+        impl $ident {
+            pub fn new(value: $ty) -> Self {
+                Self(value)
+            }
+
+            pub fn new_from<T: Into<$ty>>(value: T) -> 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
+            }
+        }
+    };
+}

crates/format/src/metadata.rs

@@ -1,14 +1,17 @@
 use std::{
     collections::BTreeMap,
+    fmt::Display,
     fs::{File, read_to_string},
     ops::Deref,
     path::{Path, PathBuf},
+    str::FromStr,
 };
 
-use serde::Deserialize;
+use serde::{Deserialize, Serialize};
 
 use crate::{
     case::Case,
+    define_wrapper_type,
     mode::{Mode, SolcMode},
 };
 
@@ -41,8 +44,10 @@ impl Deref for MetadataFile {
 
 #[derive(Debug, Default, Deserialize, Clone, Eq, PartialEq)]
 pub struct Metadata {
+    pub targets: Option<Vec<String>>,
     pub cases: Vec<Case>,
-    pub contracts: Option<BTreeMap<String, String>>,
+    pub contracts: Option<BTreeMap<ContractInstance, ContractPathAndIdentifier>>,
+    // TODO: Convert into wrapper types for clarity.
     pub libraries: Option<BTreeMap<String, BTreeMap<String, String>>>,
     pub ignore: Option<bool>,
     pub modes: Option<Vec<Mode>>,
@@ -77,28 +82,35 @@ impl Metadata {
             .to_path_buf())
     }
 
-    /// Extract the contract sources.
+    /// Returns the contract sources with canonicalized paths for the files
-    ///
+    pub fn contract_sources(
-    /// Returns a mapping of contract IDs to their source path and contract name.
+        &self,
-    pub fn contract_sources(&self) -> anyhow::Result<BTreeMap<String, (PathBuf, String)>> {
+    ) -> anyhow::Result<BTreeMap<ContractInstance, ContractPathAndIdentifier>> {
         let directory = self.directory()?;
         let mut sources = BTreeMap::new();
         let Some(contracts) = &self.contracts else {
             return Ok(sources);
         };
 
-        for (id, contract) in contracts {
+        for (
-            // TODO: broken if a colon is in the dir name..
+            alias,
-            let mut parts = contract.split(':');
+            ContractPathAndIdentifier {
-            let (Some(file_name), Some(contract_name)) = (parts.next(), parts.next()) else {
+                contract_source_path,
-                anyhow::bail!("metadata contains invalid contract: {contract}");
+                contract_ident,
-            };
+            },
-            let file = directory.to_path_buf().join(file_name);
+        ) in contracts
-            if !file.is_file() {
+        {
-                anyhow::bail!("contract {id} is not a file: {}", file.display());
+            let alias = alias.clone();
-            }
+            let absolute_path = directory.join(contract_source_path).canonicalize()?;
+            let contract_ident = contract_ident.clone();
 
-            sources.insert(id.clone(), (file, contract_name.to_string()));
+            sources.insert(
+                alias,
+                ContractPathAndIdentifier {
+                    contract_source_path: absolute_path,
+                    contract_ident,
+                },
+            );
         }
 
         Ok(sources)
@@ -178,12 +190,16 @@ impl Metadata {
         match serde_json::from_str::<Self>(&spec) {
             Ok(mut metadata) => {
                 metadata.file_path = Some(path.to_path_buf());
-                let name = path
+                metadata.contracts = Some(
-                    .file_name()
+                    [(
-                    .expect("this should be the path to a Solidity file")
+                        ContractInstance::new_from("test"),
-                    .to_str()
+                        ContractPathAndIdentifier {
-                    .expect("the file name should be valid UTF-8k");
+                            contract_source_path: path.to_path_buf(),
-                metadata.contracts = Some([(String::from("Test"), format!("{name}:Test"))].into());
+                            contract_ident: ContractIdent::new_from("Test"),
+                        },
+                    )]
+                    .into(),
+                );
                 Some(metadata)
             }
             Err(error) => {
@@ -196,3 +212,139 @@ impl Metadata {
         }
     }
 }
+
+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)]
+    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)]
+    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 ContractPathAndIdentifier {
+    /// 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 ContractPathAndIdentifier {
+    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 ContractPathAndIdentifier {
+    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())
+            }
+        }
+        let Some(path) = path else {
+            anyhow::bail!("Path is not defined");
+        };
+        let Some(identifier) = identifier else {
+            anyhow::bail!("Contract identifier is not defined")
+        };
+        Ok(Self {
+            contract_source_path: PathBuf::from(path),
+            contract_ident: ContractIdent::new(identifier),
+        })
+    }
+}
+
+impl TryFrom<String> for ContractPathAndIdentifier {
+    type Error = anyhow::Error;
+
+    fn try_from(value: String) -> Result<Self, Self::Error> {
+        Self::from_str(&value)
+    }
+}
+
+impl From<ContractPathAndIdentifier> for String {
+    fn from(value: ContractPathAndIdentifier) -> 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 = ContractPathAndIdentifier::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/node-interaction/Cargo.toml

@@ -11,6 +11,7 @@ rust-version.workspace = true
 [dependencies]
 alloy = { workspace = true }
 anyhow = { workspace = true }
+futures = { workspace = true }
 tracing = { workspace = true }
 once_cell = { workspace = true }
 tokio = { workspace = true }

crates/node-interaction/src/blocking_executor.rs

@@ -0,0 +1,228 @@
+//! The alloy crate __requires__ a tokio runtime.
+//! We contain any async rust right here.
+
+use std::{any::Any, panic::AssertUnwindSafe, pin::Pin, thread};
+
+use futures::FutureExt;
+use once_cell::sync::Lazy;
+use tokio::{
+    runtime::Builder,
+    sync::{mpsc::UnboundedSender, oneshot},
+};
+use tracing::Instrument;
+
+/// A blocking async executor.
+///
+/// This struct exposes the abstraction of a blocking async executor. It is a global and static
+/// executor which means that it doesn't require for new instances of it to be created, it's a
+/// singleton and can be accessed by any thread that wants to perform some async computation on the
+/// blocking executor thread.
+///
+/// The API of the blocking executor is created in a way so that it's very natural, simple to use,
+/// and unbounded to specific tasks or return types. The following is an example of using this
+/// executor to drive an async computation:
+///
+/// ```rust
+/// use revive_dt_node_interaction::*;
+///
+/// fn blocking_function() {
+///     let result = BlockingExecutor::execute(async move {
+///         tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+///         0xFFu8
+///     })
+///     .expect("Computation failed");
+///
+///     assert_eq!(result, 0xFF);
+/// }
+/// ```
+///
+/// Users get to pass in their async tasks without needing to worry about putting them in a [`Box`],
+/// [`Pin`], needing to perform down-casting, or the internal channel mechanism used by the runtime.
+/// To the user, it just looks like a function that converts some async code into sync code.
+///
+/// This struct also handled panics that occur in the passed futures and converts them into errors
+/// that can be handled by the user. This is done to allow the executor to be robust.
+///
+/// Internally, the executor communicates with the tokio runtime thread through channels which carry
+/// the [`TaskMessage`] and the results of the execution.
+pub struct BlockingExecutor;
+
+impl BlockingExecutor {
+    pub fn execute<R>(future: impl Future<Output = R> + Send + 'static) -> Result<R, anyhow::Error>
+    where
+        R: Send + 'static,
+    {
+        // Note: The blocking executor is a singleton and therefore we store its state in a static
+        // so that it's assigned only once. Additionally, when we set the state of the executor we
+        // spawn the thread where the async runtime runs.
+        static STATE: Lazy<ExecutorState> = Lazy::new(|| {
+            tracing::trace!("Initializing the BlockingExecutor state");
+
+            // All communication with the tokio runtime thread happens over mspc channels where the
+            // producers here are the threads that want to run async tasks and the consumer here is
+            // the tokio runtime thread.
+            let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel::<TaskMessage>();
+
+            thread::spawn(move || {
+                tracing::info!(
+                    thread_id = ?std::thread::current().id(),
+                    "Starting async runtime thread"
+                );
+
+                let runtime = Builder::new_current_thread()
+                    .enable_all()
+                    .build()
+                    .expect("Failed to create the async runtime");
+
+                runtime.block_on(async move {
+                    while let Some(TaskMessage {
+                        future: task,
+                        response_tx: response_channel,
+                    }) = rx.recv().await
+                    {
+                        tracing::trace!("Received a new future to execute");
+                        tokio::spawn(async move {
+                            // One of the things that the blocking executor does is that it allows
+                            // us to catch panics if they occur. By wrapping the given future in an
+                            // AssertUnwindSafe::catch_unwind we are able to catch all panic unwinds
+                            // in the given future and convert them into errors.
+                            let task = AssertUnwindSafe(task).catch_unwind();
+
+                            let result = task.await;
+                            let _ = response_channel.send(result);
+                        });
+                    }
+                })
+            });
+
+            ExecutorState { tx }
+        });
+
+        // We need to perform blocking synchronous communication between the current thread and the
+        // tokio runtime thread with the result of the async computation and the oneshot channels
+        // from tokio allows us to do that. The sender side of the channel will be given to the
+        // tokio runtime thread to send the result when the computation is completed and the receive
+        // side of the channel will be kept with this thread to await for the response of the async
+        // task to come back.
+        let (response_tx, response_rx) =
+            oneshot::channel::<Result<Box<dyn Any + Send>, Box<dyn Any + Send>>>();
+
+        // The tokio runtime thread expects a Future<Output = Box<dyn Any + Send>> + Send to be
+        // sent to it to execute. However, this function has a typed Future<Output = R> + Send and
+        // therefore we need to change the type of the future to fit what the runtime thread expects
+        // in the task message. In doing this conversion, we lose some of the type information since
+        // we're converting R => dyn Any. However, we will perform down-casting on the result to
+        // convert it back into R.
+        let future = Box::pin(
+            async move { Box::new(future.await) as Box<dyn Any + Send> }.in_current_span(),
+        );
+
+        let task = TaskMessage::new(future, response_tx);
+        if let Err(error) = STATE.tx.send(task) {
+            tracing::error!(?error, "Failed to send the task to the blocking executor");
+            anyhow::bail!("Failed to send the task to the blocking executor: {error:?}")
+        }
+
+        let result = match response_rx.blocking_recv() {
+            Ok(result) => result,
+            Err(error) => {
+                tracing::error!(
+                    ?error,
+                    "Failed to get the response from the blocking executor"
+                );
+                anyhow::bail!("Failed to get the response from the blocking executor: {error:?}")
+            }
+        };
+
+        match result.map(|result| {
+            *result
+                .downcast::<R>()
+                .expect("Type mismatch in the downcast")
+        }) {
+            Ok(result) => Ok(result),
+            Err(error) => {
+                tracing::error!(
+                    ?error,
+                    "Failed to downcast the returned result into the expected type"
+                );
+                anyhow::bail!(
+                    "Failed to downcast the returned result into the expected type: {error:?}"
+                )
+            }
+        }
+    }
+}
+/// Represents the state of the async runtime. This runtime is designed to be a singleton runtime
+/// which means that in the current running program there's just a single thread that has an async
+/// runtime.
+struct ExecutorState {
+    /// The sending side of the task messages channel. This is used by all of the other threads to
+    /// communicate with the async runtime thread.
+    tx: UnboundedSender<TaskMessage>,
+}
+
+/// Represents a message that contains an asynchronous task that's to be executed by the runtime
+/// as well as a way for the runtime to report back on the result of the execution.
+struct TaskMessage {
+    /// The task that's being requested to run. This is a future that returns an object that does
+    /// implement [`Any`] and [`Send`] to allow it to be sent between the requesting thread and the
+    /// async thread.
+    future: Pin<Box<dyn Future<Output = Box<dyn Any + Send>> + Send>>,
+
+    /// A one shot sender channel where the sender of the task is expecting to hear back on the
+    /// result of the task.
+    response_tx: oneshot::Sender<Result<Box<dyn Any + Send>, Box<dyn Any + Send>>>,
+}
+
+impl TaskMessage {
+    pub fn new(
+        future: Pin<Box<dyn Future<Output = Box<dyn Any + Send>> + Send>>,
+        response_tx: oneshot::Sender<Result<Box<dyn Any + Send>, Box<dyn Any + Send>>>,
+    ) -> Self {
+        Self {
+            future,
+            response_tx,
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn simple_future_works() {
+        // Act
+        let result = BlockingExecutor::execute(async move {
+            tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+            0xFFu8
+        })
+        .unwrap();
+
+        // Assert
+        assert_eq!(result, 0xFFu8);
+    }
+
+    #[test]
+    #[allow(unreachable_code, clippy::unreachable)]
+    fn panics_in_futures_are_caught() {
+        // Act
+        let result = BlockingExecutor::execute(async move {
+            panic!("This is a panic!");
+            0xFFu8
+        });
+
+        // Assert
+        assert!(result.is_err());
+
+        // Act
+        let result = BlockingExecutor::execute(async move {
+            tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+            0xFFu8
+        })
+        .unwrap();
+
+        // Assert
+        assert_eq!(result, 0xFFu8)
+    }
+}

crates/node-interaction/src/lib.rs

@@ -1,29 +1,49 @@
 //! This crate implements all node interactions.
 
-use alloy::primitives::Address;
+use alloy::eips::BlockNumberOrTag;
-use alloy::rpc::types::trace::geth::{DiffMode, GethTrace};
+use alloy::primitives::{Address, BlockHash, BlockNumber, BlockTimestamp, ChainId, U256};
+use alloy::rpc::types::trace::geth::{DiffMode, GethDebugTracingOptions, GethTrace};
 use alloy::rpc::types::{TransactionReceipt, TransactionRequest};
-use tokio_runtime::TO_TOKIO;
+use anyhow::Result;
 
-pub mod nonce;
+mod blocking_executor;
-mod tokio_runtime;
+pub use blocking_executor::*;
-pub mod trace;
-pub mod transaction;
 
 /// An interface for all interactions with Ethereum compatible nodes.
 pub trait EthereumNode {
     /// Execute the [TransactionRequest] and return a [TransactionReceipt].
-    fn execute_transaction(
+    fn execute_transaction(&self, transaction: TransactionRequest) -> Result<TransactionReceipt>;
-        &self,
-        transaction: TransactionRequest,
-    ) -> anyhow::Result<TransactionReceipt>;
 
     /// Trace the transaction in the [TransactionReceipt] and return a [GethTrace].
-    fn trace_transaction(&self, transaction: TransactionReceipt) -> anyhow::Result<GethTrace>;
+    fn trace_transaction(
+        &self,
+        receipt: &TransactionReceipt,
+        trace_options: GethDebugTracingOptions,
+    ) -> Result<GethTrace>;
 
     /// Returns the state diff of the transaction hash in the [TransactionReceipt].
-    fn state_diff(&self, transaction: TransactionReceipt) -> anyhow::Result<DiffMode>;
+    fn state_diff(&self, receipt: &TransactionReceipt) -> Result<DiffMode>;
 
-    /// Returns the next available nonce for the given [Address].
+    /// Returns the ID of the chain that the node is on.
-    fn fetch_add_nonce(&self, address: Address) -> anyhow::Result<u64>;
+    fn chain_id(&self) -> 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) -> Result<u128>;
+
+    /// Returns the coinbase of the specified block.
+    fn block_coinbase(&self, number: BlockNumberOrTag) -> Result<Address>;
+
+    /// Returns the difficulty of the specified block.
+    fn block_difficulty(&self, number: BlockNumberOrTag) -> Result<U256>;
+
+    /// Returns the hash of the specified block.
+    fn block_hash(&self, number: BlockNumberOrTag) -> Result<BlockHash>;
+
+    /// Returns the timestamp of the specified block,
+    fn block_timestamp(&self, number: BlockNumberOrTag) -> Result<BlockTimestamp>;
+
+    /// Returns the number of the last block.
+    fn last_block_number(&self) -> Result<BlockNumber>;
 }

crates/node-interaction/src/nonce.rs

@@ -1,55 +0,0 @@
-use std::pin::Pin;
-
-use alloy::{
-    primitives::Address,
-    providers::{Provider, ProviderBuilder},
-};
-use tokio::sync::oneshot;
-
-use crate::{TO_TOKIO, tokio_runtime::AsyncNodeInteraction};
-
-pub type Task = Pin<Box<dyn Future<Output = anyhow::Result<u64>> + Send>>;
-
-pub(crate) struct Nonce {
-    sender: oneshot::Sender<anyhow::Result<u64>>,
-    task: Task,
-}
-
-impl AsyncNodeInteraction for Nonce {
-    type Output = anyhow::Result<u64>;
-
-    fn split(
-        self,
-    ) -> (
-        std::pin::Pin<Box<dyn Future<Output = Self::Output> + Send>>,
-        oneshot::Sender<Self::Output>,
-    ) {
-        (self.task, self.sender)
-    }
-}
-
-/// This is like `trace_transaction`, just for nonces.
-pub fn fetch_onchain_nonce(
-    connection: String,
-    wallet: alloy::network::EthereumWallet,
-    address: Address,
-) -> anyhow::Result<u64> {
-    let sender = TO_TOKIO.lock().unwrap().nonce_sender.clone();
-
-    let (tx, rx) = oneshot::channel();
-    let task: Task = Box::pin(async move {
-        let provider = ProviderBuilder::new()
-            .wallet(wallet)
-            .connect(&connection)
-            .await?;
-        let onchain = provider.get_transaction_count(address).await?;
-        Ok(onchain)
-    });
-
-    sender
-        .blocking_send(Nonce { task, sender: tx })
-        .expect("not in async context");
-
-    rx.blocking_recv()
-        .unwrap_or_else(|err| anyhow::bail!("nonce fetch failed: {err}"))
-}

crates/node-interaction/src/tokio_runtime.rs

@@ -1,87 +0,0 @@
-//! The alloy crate __requires__ a tokio runtime.
-//! We contain any async rust right here.
-
-use once_cell::sync::Lazy;
-use std::pin::Pin;
-use std::sync::Mutex;
-use std::thread;
-use tokio::runtime::Runtime;
-use tokio::spawn;
-use tokio::sync::{mpsc, oneshot};
-use tokio::task::JoinError;
-
-use crate::nonce::Nonce;
-use crate::trace::Trace;
-use crate::transaction::Transaction;
-
-pub(crate) static TO_TOKIO: Lazy<Mutex<TokioRuntime>> =
-    Lazy::new(|| Mutex::new(TokioRuntime::spawn()));
-
-/// Common interface for executing async node interactions from a non-async context.
-#[allow(clippy::type_complexity)]
-pub(crate) trait AsyncNodeInteraction: Send + 'static {
-    type Output: Send;
-
-    //// Returns the task and the output sender.
-    fn split(
-        self,
-    ) -> (
-        Pin<Box<dyn Future<Output = Self::Output> + Send>>,
-        oneshot::Sender<Self::Output>,
-    );
-}
-
-pub(crate) struct TokioRuntime {
-    pub(crate) transaction_sender: mpsc::Sender<Transaction>,
-    pub(crate) trace_sender: mpsc::Sender<Trace>,
-    pub(crate) nonce_sender: mpsc::Sender<Nonce>,
-}
-
-impl TokioRuntime {
-    fn spawn() -> Self {
-        let rt = Runtime::new().expect("should be able to create the tokio runtime");
-        let (transaction_sender, transaction_receiver) = mpsc::channel::<Transaction>(1024);
-        let (trace_sender, trace_receiver) = mpsc::channel::<Trace>(1024);
-        let (nonce_sender, nonce_receiver) = mpsc::channel::<Nonce>(1024);
-
-        thread::spawn(move || {
-            rt.block_on(async move {
-                let transaction_task = spawn(interaction::<Transaction>(transaction_receiver));
-                let trace_task = spawn(interaction::<Trace>(trace_receiver));
-                let nonce_task = spawn(interaction::<Nonce>(nonce_receiver));
-
-                if let Err(error) = transaction_task.await {
-                    tracing::error!("tokio transaction task failed: {error}");
-                }
-                if let Err(error) = trace_task.await {
-                    tracing::error!("tokio trace transaction task failed: {error}");
-                }
-                if let Err(error) = nonce_task.await {
-                    tracing::error!("tokio nonce task failed: {error}");
-                }
-            });
-        });
-
-        Self {
-            transaction_sender,
-            trace_sender,
-            nonce_sender,
-        }
-    }
-}
-
-async fn interaction<T>(mut receiver: mpsc::Receiver<T>) -> Result<(), JoinError>
-where
-    T: AsyncNodeInteraction,
-{
-    while let Some(task) = receiver.recv().await {
-        spawn(async move {
-            let (task, sender) = task.split();
-            sender
-                .send(task.await)
-                .unwrap_or_else(|_| panic!("failed to send task output"));
-        });
-    }
-
-    Ok(())
-}

crates/node-interaction/src/trace.rs

@@ -1,43 +0,0 @@
-//! Trace transactions in a sync context.
-
-use std::pin::Pin;
-
-use alloy::rpc::types::trace::geth::GethTrace;
-use tokio::sync::oneshot;
-
-use crate::TO_TOKIO;
-use crate::tokio_runtime::AsyncNodeInteraction;
-
-pub type Task = Pin<Box<dyn Future<Output = anyhow::Result<GethTrace>> + Send>>;
-
-pub(crate) struct Trace {
-    sender: oneshot::Sender<anyhow::Result<GethTrace>>,
-    task: Task,
-}
-
-impl AsyncNodeInteraction for Trace {
-    type Output = anyhow::Result<GethTrace>;
-
-    fn split(
-        self,
-    ) -> (
-        std::pin::Pin<Box<dyn Future<Output = Self::Output> + Send>>,
-        oneshot::Sender<Self::Output>,
-    ) {
-        (self.task, self.sender)
-    }
-}
-
-/// Execute some [Task] that return a [GethTrace] result.
-pub fn trace_transaction(task: Task) -> anyhow::Result<GethTrace> {
-    let task_sender = TO_TOKIO.lock().unwrap().trace_sender.clone();
-    let (sender, receiver) = oneshot::channel();
-
-    task_sender
-        .blocking_send(Trace { task, sender })
-        .expect("we are not calling this from an async context");
-
-    receiver
-        .blocking_recv()
-        .unwrap_or_else(|error| anyhow::bail!("no trace received: {error}"))
-}

crates/node-interaction/src/transaction.rs

@@ -1,46 +0,0 @@
-//! Execute transactions in a sync context.
-
-use std::pin::Pin;
-
-use alloy::rpc::types::TransactionReceipt;
-use tokio::sync::oneshot;
-
-use crate::TO_TOKIO;
-use crate::tokio_runtime::AsyncNodeInteraction;
-
-pub type Task = Pin<Box<dyn Future<Output = anyhow::Result<TransactionReceipt>> + Send>>;
-
-pub(crate) struct Transaction {
-    receipt_sender: oneshot::Sender<anyhow::Result<TransactionReceipt>>,
-    task: Task,
-}
-
-impl AsyncNodeInteraction for Transaction {
-    type Output = anyhow::Result<TransactionReceipt>;
-
-    fn split(
-        self,
-    ) -> (
-        Pin<Box<dyn Future<Output = Self::Output> + Send>>,
-        oneshot::Sender<Self::Output>,
-    ) {
-        (self.task, self.receipt_sender)
-    }
-}
-
-/// Execute some [Task] that returns a [TransactionReceipt].
-pub fn execute_transaction(task: Task) -> anyhow::Result<TransactionReceipt> {
-    let request_sender = TO_TOKIO.lock().unwrap().transaction_sender.clone();
-    let (receipt_sender, receipt_receiver) = oneshot::channel();
-
-    request_sender
-        .blocking_send(Transaction {
-            receipt_sender,
-            task,
-        })
-        .expect("we are not calling this from an async context");
-
-    receipt_receiver
-        .blocking_recv()
-        .unwrap_or_else(|error| anyhow::bail!("no receipt received: {error}"))
-}

crates/node/Cargo.toml

@@ -25,3 +25,4 @@ 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.
+///
+/// We use [`u128::MAX`] here which means that accounts will be given 2^128 - 1 WEI which is
+/// (2^128 - 1) / 10^18 ETH.
+pub const INITIAL_BALANCE: u128 = u128::MAX;

crates/node/src/geth.rs

@@ -1,35 +1,35 @@
 //! The go-ethereum node implementation.
 
 use std::{
-    collections::HashMap,
+    fs::{File, OpenOptions, create_dir_all, remove_dir_all},
-    fs::{File, create_dir_all, remove_dir_all},
     io::{BufRead, BufReader, Read, Write},
     path::PathBuf,
     process::{Child, Command, Stdio},
-    sync::{
+    sync::atomic::{AtomicU32, Ordering},
-        Mutex,
-        atomic::{AtomicU32, Ordering},
-    },
-    thread,
     time::{Duration, Instant},
 };
 
 use alloy::{
-    network::EthereumWallet,
+    eips::BlockNumberOrTag,
-    primitives::Address,
+    genesis::{Genesis, GenesisAccount},
-    providers::{Provider, ProviderBuilder, ext::DebugApi},
+    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 revive_dt_config::Arguments;
-use revive_dt_node_interaction::{
+use revive_dt_node_interaction::{BlockingExecutor, EthereumNode};
-    EthereumNode, nonce::fetch_onchain_nonce, trace::trace_transaction,
+use tracing::Level;
-    transaction::execute_transaction,
-};
 
-use crate::Node;
+use crate::{Node, common::FallbackGasFiller, constants::INITIAL_BALANCE};
 
 static NODE_COUNT: AtomicU32 = AtomicU32::new(0);
 
@@ -45,18 +45,25 @@ pub struct Instance {
     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,
-    nonces: Mutex<HashMap<Address, u64>>,
+    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 Instance {
     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";
@@ -64,12 +71,26 @@ impl Instance {
     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";
+
     /// 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> {
         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)
+        {
+            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);
-        File::create(&genesis_path)?.write_all(genesis.as_bytes())?;
+        serde_json::to_writer(File::create(&genesis_path)?, &genesis)?;
 
         let mut child = Command::new(&self.geth)
             .arg("init")
@@ -96,8 +117,24 @@ impl Instance {
 
     /// Spawn the go-ethereum node child process.
     ///
-    /// [Instance::init] must be called priorly.
+    /// [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")
@@ -109,64 +146,106 @@ impl Instance {
             .arg("--nodiscover")
             .arg("--maxpeers")
             .arg("0")
-            .stderr(Stdio::piped())
+            .stderr(stderr_logs_file.try_clone()?)
-            .stdout(Stdio::null())
+            .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> {
-        // Thanks clippy but geth is a server; we don't `wait` but eventually kill it.
-        #[allow(clippy::zombie_processes)]
-        let mut child = self.handle.take().expect("should be spawned");
         let start_time = Instant::now();
-        let maximum_wait_time = Duration::from_millis(self.start_timeout);
-        let mut stderr = BufReader::new(child.stderr.take().expect("should be piped")).lines();
-        let error = loop {
-            let Some(Ok(line)) = stderr.next() else {
-                break "child process stderr reading error".to_string();
-            };
-            if line.contains(Self::ERROR_MARKER) {
-                break line;
-            }
-            if line.contains(Self::READY_MARKER) {
-                // Keep stderr alive
-                // https://github.com/alloy-rs/alloy/issues/2091#issuecomment-2676134147
-                thread::spawn(move || for _ in stderr.by_ref() {});
 
-                self.handle = child.into();
+        let logs_file = OpenOptions::new()
-                return Ok(self);
+            .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 {
-                break "spawn timeout".to_string();
+                anyhow::bail!("Timeout in starting geth");
             }
-        };
+        }
+    }
 
-        let _ = child.kill();
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id), level = Level::TRACE)]
-        anyhow::bail!("geth node #{} spawn error: {error}", self.id)
+    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 Instance {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
     fn execute_transaction(
         &self,
         transaction: TransactionRequest,
     ) -> anyhow::Result<alloy::rpc::types::TransactionReceipt> {
-        let connection_string = self.connection_string();
+        let provider = self.provider();
-        let wallet = self.wallet.clone();
+        BlockingExecutor::execute(async move {
-
+            let outer_span = tracing::debug_span!("Submitting transaction", ?transaction);
-        execute_transaction(Box::pin(async move {
-            let outer_span = tracing::debug_span!("Submitting transaction", ?transaction,);
             let _outer_guard = outer_span.enter();
 
-            let provider = ProviderBuilder::new()
+            let provider = provider.await?;
-                .wallet(wallet)
-                .connect(&connection_string)
-                .await?;
 
             let pending_transaction = provider.send_transaction(transaction).await?;
             let transaction_hash = pending_transaction.tx_hash();
@@ -238,37 +317,34 @@ impl EthereumNode for Instance {
                     }
                 }
             }
-        }))
+        })?
     }
 
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
     fn trace_transaction(
         &self,
-        transaction: TransactionReceipt,
+        transaction: &TransactionReceipt,
+        trace_options: GethDebugTracingOptions,
     ) -> anyhow::Result<alloy::rpc::types::trace::geth::GethTrace> {
-        let connection_string = self.connection_string();
+        let tx_hash = transaction.transaction_hash;
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            Ok(provider
+                .await?
+                .debug_trace_transaction(tx_hash, trace_options)
+                .await?)
+        })?
+    }
+
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    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,
         });
-        let wallet = self.wallet.clone();
-
-        trace_transaction(Box::pin(async move {
-            Ok(ProviderBuilder::new()
-                .wallet(wallet)
-                .connect(&connection_string)
-                .await?
-                .debug_trace_transaction(transaction.transaction_hash, trace_options)
-                .await?)
-        }))
-    }
-
-    fn state_diff(
-        &self,
-        transaction: alloy::rpc::types::TransactionReceipt,
-    ) -> anyhow::Result<DiffMode> {
         match self
-            .trace_transaction(transaction)?
+            .trace_transaction(transaction, trace_options)?
             .try_into_pre_state_frame()?
         {
             PreStateFrame::Diff(diff) => Ok(diff),
@@ -276,17 +352,85 @@ impl EthereumNode for Instance {
         }
     }
 
-    fn fetch_add_nonce(&self, address: Address) -> anyhow::Result<u64> {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
-        let connection_string = self.connection_string.clone();
+    fn chain_id(&self) -> anyhow::Result<alloy::primitives::ChainId> {
-        let wallet = self.wallet.clone();
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider.await?.get_chain_id().await.map_err(Into::into)
+        })?
+    }
 
-        let onchain_nonce = fetch_onchain_nonce(connection_string, wallet, address)?;
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn block_gas_limit(&self, number: BlockNumberOrTag) -> anyhow::Result<u128> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider
+                .await?
+                .get_block_by_number(number)
+                .await?
+                .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+                .map(|block| block.header.gas_limit as _)
+        })?
+    }
 
-        let mut nonces = self.nonces.lock().unwrap();
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
-        let current = nonces.entry(address).or_insert(onchain_nonce);
+    fn block_coinbase(&self, number: BlockNumberOrTag) -> anyhow::Result<Address> {
-        let value = *current;
+        let provider = self.provider();
-        *current += 1;
+        BlockingExecutor::execute(async move {
-        Ok(value)
+            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))]
+    fn block_difficulty(&self, number: BlockNumberOrTag) -> anyhow::Result<U256> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn block_hash(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockHash> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn block_timestamp(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockTimestamp> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn last_block_number(&self) -> anyhow::Result<BlockNumber> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider.await?.get_block_number().await.map_err(Into::into)
+        })?
     }
 }
 
@@ -296,33 +440,67 @@ impl Node for Instance {
         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: config.wallet(),
+            wallet,
-            nonces: Mutex::new(HashMap::new()),
+            // 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()
     }
 
-    fn shutdown(self) -> anyhow::Result<()> {
+    #[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()?.wait_ready()?;
+        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")
@@ -334,28 +512,32 @@ impl Node for Instance {
             .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 Instance {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
     fn drop(&mut self) {
-        tracing::info!(id = self.id, "Dropping node");
+        self.shutdown().expect("Failed to shutdown")
-        if let Some(child) = self.handle.as_mut() {
-            let _ = child.kill();
-        }
-        if self.base_directory.exists() {
-            let _ = remove_dir_all(&self.base_directory);
-        }
     }
 }
 
 #[cfg(test)]
 mod tests {
     use revive_dt_config::Arguments;
+
     use temp_dir::TempDir;
 
     use crate::{GENESIS_JSON, Node};
 
-    use super::Instance;
+    use super::*;
 
     fn test_config() -> (Arguments, TempDir) {
         let mut config = Arguments::default();
@@ -365,6 +547,16 @@ mod tests {
         (config, temp_dir)
     }
 
+    fn new_node() -> (Instance, TempDir) {
+        let (args, temp_dir) = test_config();
+        let mut node = Instance::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() {
         Instance::new(&test_config().0)
@@ -387,4 +579,93 @@ mod tests {
             "expected version string, got: '{version}'"
         );
     }
+
+    #[test]
+    fn can_get_chain_id_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let chain_id = node.chain_id();
+
+        // Assert
+        let chain_id = chain_id.expect("Failed to get the chain id");
+        assert_eq!(chain_id, 420_420_420);
+    }
+
+    #[test]
+    fn can_get_gas_limit_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let gas_limit = node.block_gas_limit(BlockNumberOrTag::Latest);
+
+        // Assert
+        let gas_limit = gas_limit.expect("Failed to get the gas limit");
+        assert_eq!(gas_limit, u32::MAX as u128)
+    }
+
+    #[test]
+    fn can_get_coinbase_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let coinbase = node.block_coinbase(BlockNumberOrTag::Latest);
+
+        // Assert
+        let coinbase = coinbase.expect("Failed to get the coinbase");
+        assert_eq!(coinbase, Address::new([0xFF; 20]))
+    }
+
+    #[test]
+    fn can_get_block_difficulty_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_difficulty = node.block_difficulty(BlockNumberOrTag::Latest);
+
+        // Assert
+        let block_difficulty = block_difficulty.expect("Failed to get the block difficulty");
+        assert_eq!(block_difficulty, U256::ZERO)
+    }
+
+    #[test]
+    fn can_get_block_hash_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_hash = node.block_hash(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = block_hash.expect("Failed to get the block hash");
+    }
+
+    #[test]
+    fn can_get_block_timestamp_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_timestamp = node.block_timestamp(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = block_timestamp.expect("Failed to get the block timestamp");
+    }
+
+    #[test]
+    fn can_get_block_number_from_node() {
+        // Arrange
+        let (node, _temp_dir) = new_node();
+
+        // Act
+        let block_number = node.last_block_number();
+
+        // Assert
+        let block_number = block_number.expect("Failed to get the block number");
+        assert_eq!(block_number, 0)
+    }
 }

crates/node/src/kitchensink.rs

@@ -1,43 +1,45 @@
 use std::{
-    collections::HashMap,
+    fs::{File, OpenOptions, create_dir_all, remove_dir_all},
-    fs::create_dir_all,
+    io::{BufRead, Write},
-    io::BufRead,
+    path::{Path, PathBuf},
-    path::PathBuf,
     process::{Child, Command, Stdio},
-    sync::{
+    sync::atomic::{AtomicU32, Ordering},
-        Mutex,
-        atomic::{AtomicU32, Ordering},
-    },
     time::Duration,
 };
 
 use alloy::{
     consensus::{BlockHeader, TxEnvelope},
-    hex,
+    eips::BlockNumberOrTag,
+    genesis::{Genesis, GenesisAccount},
     network::{
-        Ethereum, EthereumWallet, Network, TransactionBuilder, TransactionBuilderError,
+        Ethereum, EthereumWallet, Network, NetworkWallet, TransactionBuilder,
-        UnbuiltTransactionError,
+        TransactionBuilderError, UnbuiltTransactionError,
+    },
+    primitives::{
+        Address, B64, B256, BlockHash, BlockNumber, BlockTimestamp, Bloom, Bytes, FixedBytes, U256,
+    },
+    providers::{
+        Provider, ProviderBuilder,
+        ext::DebugApi,
+        fillers::{CachedNonceManager, ChainIdFiller, FillProvider, NonceFiller, TxFiller},
     },
-    primitives::{Address, B64, B256, BlockNumber, Bloom, Bytes, U256},
-    providers::{Provider, ProviderBuilder, ext::DebugApi},
     rpc::types::{
         TransactionReceipt,
         eth::{Block, Header, Transaction},
         trace::geth::{DiffMode, GethDebugTracingOptions, PreStateConfig, PreStateFrame},
     },
+    signers::local::PrivateKeySigner,
 };
 use serde::{Deserialize, Serialize};
 use serde_json::{Value as JsonValue, json};
 use sp_core::crypto::Ss58Codec;
 use sp_runtime::AccountId32;
+use tracing::Level;
 
 use revive_dt_config::Arguments;
-use revive_dt_node_interaction::{
+use revive_dt_node_interaction::{BlockingExecutor, EthereumNode};
-    EthereumNode, nonce::fetch_onchain_nonce, trace::trace_transaction,
-    transaction::execute_transaction,
-};
 
-use crate::Node;
+use crate::{Node, common::FallbackGasFiller, constants::INITIAL_BALANCE};
 
 static NODE_COUNT: AtomicU32 = AtomicU32::new(0);
 
@@ -49,13 +51,22 @@ pub struct KitchensinkNode {
     rpc_url: String,
     wallet: EthereumWallet,
     base_directory: PathBuf,
+    logs_directory: PathBuf,
     process_substrate: Option<Child>,
     process_proxy: Option<Child>,
-    nonces: Mutex<HashMap<Address, u64>>,
+    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 KitchensinkNode {
     const BASE_DIRECTORY: &str = "kitchensink";
+    const LOGS_DIRECTORY: &str = "logs";
+    const DATA_DIRECTORY: &str = "chains";
+
     const SUBSTRATE_READY_MARKER: &str = "Running JSON-RPC server";
     const ETH_PROXY_READY_MARKER: &str = "Running JSON-RPC server";
     const CHAIN_SPEC_JSON_FILE: &str = "template_chainspec.json";
@@ -65,11 +76,21 @@ impl KitchensinkNode {
     const SUBSTRATE_LOG_ENV: &str = "error,evm=debug,sc_rpc_server=info,runtime::revive=debug";
     const PROXY_LOG_ENV: &str = "info,eth-rpc=debug";
 
+    const KITCHENSINK_STDOUT_LOG_FILE_NAME: &str = "node_stdout.log";
+    const KITCHENSINK_STDERR_LOG_FILE_NAME: &str = "node_stderr.log";
+
+    const PROXY_STDOUT_LOG_FILE_NAME: &str = "proxy_stdout.log";
+    const PROXY_STDERR_LOG_FILE_NAME: &str = "proxy_stderr.log";
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn init(&mut self, genesis: &str) -> anyhow::Result<&mut Self> {
         create_dir_all(&self.base_directory)?;
+        create_dir_all(&self.logs_directory)?;
 
         let template_chainspec_path = self.base_directory.join(Self::CHAIN_SPEC_JSON_FILE);
 
+        // Note: we do not pipe the logs of this process to a separate file since this is just a
+        // once-off export of the default chain spec and not part of the long-running node process.
         let output = Command::new(&self.substrate_binary)
             .arg("export-chain-spec")
             .arg("--chain")
@@ -105,7 +126,18 @@ impl KitchensinkNode {
                 None
             })
             .collect();
-        let mut eth_balances = self.extract_balance_from_genesis_file(genesis)?;
+        let mut eth_balances = {
+            let mut genesis = serde_json::from_str::<Genesis>(genesis)?;
+            for signer_address in
+                <EthereumWallet as NetworkWallet<Ethereum>>::signer_addresses(&self.wallet)
+            {
+                genesis
+                    .alloc
+                    .entry(signer_address)
+                    .or_insert(GenesisAccount::default().with_balance(U256::from(INITIAL_BALANCE)));
+            }
+            self.extract_balance_from_genesis_file(&genesis)?
+        };
         merged_balances.append(&mut eth_balances);
 
         chainspec_json["genesis"]["runtimeGenesis"]["patch"]["balances"]["balances"] =
@@ -118,6 +150,7 @@ impl KitchensinkNode {
         Ok(self)
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn spawn_process(&mut self) -> anyhow::Result<()> {
         let substrate_rpc_port = Self::BASE_SUBSTRATE_RPC_PORT + self.id as u16;
         let proxy_rpc_port = Self::BASE_PROXY_RPC_PORT + self.id as u16;
@@ -126,8 +159,26 @@ impl KitchensinkNode {
 
         let chainspec_path = self.base_directory.join(Self::CHAIN_SPEC_JSON_FILE);
 
+        // 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
+        };
+
         // Start Substrate node
-        let mut substrate_process = Command::new(&self.substrate_binary)
+        let kitchensink_stdout_logs_file = open_options
+            .clone()
+            .open(self.kitchensink_stdout_log_file_path())?;
+        let kitchensink_stderr_logs_file = open_options
+            .clone()
+            .open(self.kitchensink_stderr_log_file_path())?;
+        self.process_substrate = Command::new(&self.substrate_binary)
+            .arg("--dev")
             .arg("--chain")
             .arg(chainspec_path)
             .arg("--base-path")
@@ -142,101 +193,111 @@ impl KitchensinkNode {
             .arg("--rpc-cors")
             .arg("all")
             .env("RUST_LOG", Self::SUBSTRATE_LOG_ENV)
-            .stdout(Stdio::null())
+            .stdout(kitchensink_stdout_logs_file.try_clone()?)
-            .stderr(Stdio::piped())
+            .stderr(kitchensink_stderr_logs_file.try_clone()?)
-            .spawn()?;
+            .spawn()?
+            .into();
 
         // Give the node a moment to boot
-        Self::wait_ready(
+        if let Err(error) = Self::wait_ready(
-            &mut substrate_process,
+            self.kitchensink_stderr_log_file_path().as_path(),
             Self::SUBSTRATE_READY_MARKER,
             Duration::from_secs(30),
-        )?;
+        ) {
+            tracing::error!(
+                ?error,
+                "Failed to start substrate, shutting down gracefully"
+            );
+            self.shutdown()?;
+            return Err(error);
+        };
 
-        let mut proxy_process = Command::new(&self.eth_proxy_binary)
+        let eth_proxy_stdout_logs_file = open_options
+            .clone()
+            .open(self.proxy_stdout_log_file_path())?;
+        let eth_proxy_stderr_logs_file = open_options.open(self.proxy_stderr_log_file_path())?;
+        self.process_proxy = Command::new(&self.eth_proxy_binary)
             .arg("--dev")
             .arg("--rpc-port")
             .arg(proxy_rpc_port.to_string())
             .arg("--node-rpc-url")
             .arg(format!("ws://127.0.0.1:{substrate_rpc_port}"))
             .env("RUST_LOG", Self::PROXY_LOG_ENV)
-            .stdout(Stdio::null())
+            .stdout(eth_proxy_stdout_logs_file.try_clone()?)
-            .stderr(Stdio::piped())
+            .stderr(eth_proxy_stderr_logs_file.try_clone()?)
-            .spawn()?;
+            .spawn()?
+            .into();
 
-        Self::wait_ready(
+        if let Err(error) = Self::wait_ready(
-            &mut proxy_process,
+            self.proxy_stderr_log_file_path().as_path(),
             Self::ETH_PROXY_READY_MARKER,
             Duration::from_secs(30),
-        )?;
+        ) {
+            tracing::error!(?error, "Failed to start proxy, shutting down gracefully");
+            self.shutdown()?;
+            return Err(error);
+        };
 
-        self.process_substrate = Some(substrate_process);
+        self.logs_file_to_flush.extend([
-        self.process_proxy = Some(proxy_process);
+            kitchensink_stdout_logs_file,
+            kitchensink_stderr_logs_file,
+            eth_proxy_stdout_logs_file,
+            eth_proxy_stderr_logs_file,
+        ]);
 
         Ok(())
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn extract_balance_from_genesis_file(
         &self,
-        genesis_str: &str,
+        genesis: &Genesis,
     ) -> anyhow::Result<Vec<(String, u128)>> {
-        let genesis_json: JsonValue = serde_json::from_str(genesis_str)?;
+        genesis
-        let alloc = genesis_json
+            .alloc
-            .get("alloc")
+            .iter()
-            .and_then(|a| a.as_object())
+            .try_fold(Vec::new(), |mut vec, (address, acc)| {
-            .ok_or_else(|| anyhow::anyhow!("Missing 'alloc' in genesis"))?;
+                let substrate_address = Self::eth_to_substrate_address(address);
-
+                let balance = acc.balance.try_into()?;
-        let mut balances = Vec::new();
+                vec.push((substrate_address, balance));
-        for (eth_addr, obj) in alloc.iter() {
+                Ok(vec)
-            let balance_str = obj.get("balance").and_then(|b| b.as_str()).unwrap_or("0");
+            })
-            let balance = if balance_str.starts_with("0x") {
-                u128::from_str_radix(balance_str.trim_start_matches("0x"), 16)?
-            } else {
-                balance_str.parse::<u128>()?
-            };
-            let substrate_addr = Self::eth_to_substrate_address(eth_addr)?;
-            balances.push((substrate_addr.clone(), balance));
-        }
-        Ok(balances)
     }
 
-    fn eth_to_substrate_address(eth_addr: &str) -> anyhow::Result<String> {
+    fn eth_to_substrate_address(address: &Address) -> String {
-        let eth_bytes = hex::decode(eth_addr.trim_start_matches("0x"))?;
+        let eth_bytes = address.0.0;
-        if eth_bytes.len() != 20 {
-            anyhow::bail!(
-                "Invalid Ethereum address length: expected 20 bytes, got {}",
-                eth_bytes.len()
-            );
-        }
 
         let mut padded = [0xEEu8; 32];
         padded[..20].copy_from_slice(&eth_bytes);
 
         let account_id = AccountId32::from(padded);
-        Ok(account_id.to_ss58check())
+        account_id.to_ss58check()
     }
 
-    fn wait_ready(child: &mut Child, marker: &str, timeout: Duration) -> anyhow::Result<()> {
+    fn wait_ready(logs_file_path: &Path, marker: &str, timeout: Duration) -> anyhow::Result<()> {
         let start_time = std::time::Instant::now();
-        let stderr = child.stderr.take().expect("stderr must be piped");
+        let logs_file = OpenOptions::new()
+            .read(true)
+            .write(false)
+            .append(false)
+            .truncate(false)
+            .open(logs_file_path)?;
 
-        let mut lines = std::io::BufReader::new(stderr).lines();
+        let mut lines = std::io::BufReader::new(logs_file).lines();
         loop {
             if let Some(Ok(line)) = lines.next() {
-                println!("Kitchensink log: {line:?}");
                 if line.contains(marker) {
-                    std::thread::spawn(move || for _ in lines.by_ref() {});
                     return Ok(());
                 }
             }
 
             if start_time.elapsed() > timeout {
-                let _ = child.kill();
                 anyhow::bail!("Timeout waiting for process readiness: {marker}");
             }
         }
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     pub fn eth_rpc_version(&self) -> anyhow::Result<String> {
         let output = Command::new(&self.eth_proxy_binary)
             .arg("--version")
@@ -248,61 +309,113 @@ impl KitchensinkNode {
             .stdout;
         Ok(String::from_utf8_lossy(&output).trim().to_string())
     }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id), level = Level::TRACE)]
+    fn kitchensink_stdout_log_file_path(&self) -> PathBuf {
+        self.logs_directory
+            .join(Self::KITCHENSINK_STDOUT_LOG_FILE_NAME)
+    }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id), level = Level::TRACE)]
+    fn kitchensink_stderr_log_file_path(&self) -> PathBuf {
+        self.logs_directory
+            .join(Self::KITCHENSINK_STDERR_LOG_FILE_NAME)
+    }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id), level = Level::TRACE)]
+    fn proxy_stdout_log_file_path(&self) -> PathBuf {
+        self.logs_directory.join(Self::PROXY_STDOUT_LOG_FILE_NAME)
+    }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id), level = Level::TRACE)]
+    fn proxy_stderr_log_file_path(&self) -> PathBuf {
+        self.logs_directory.join(Self::PROXY_STDERR_LOG_FILE_NAME)
+    }
+
+    fn provider(
+        &self,
+    ) -> impl Future<
+        Output = anyhow::Result<
+            FillProvider<
+                impl TxFiller<KitchenSinkNetwork>,
+                impl Provider<KitchenSinkNetwork>,
+                KitchenSinkNetwork,
+            >,
+        >,
+    > + '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()
+                .network::<KitchenSinkNetwork>()
+                .filler(FallbackGasFiller::new(
+                    30_000_000,
+                    200_000_000_000,
+                    3_000_000_000,
+                ))
+                .filler(ChainIdFiller::default())
+                .filler(NonceFiller::new(nonce_manager))
+                .wallet(wallet)
+                .connect(&connection_string)
+                .await
+                .map_err(Into::into)
+        })
+    }
 }
 
 impl EthereumNode for KitchensinkNode {
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn execute_transaction(
         &self,
         transaction: alloy::rpc::types::TransactionRequest,
     ) -> anyhow::Result<TransactionReceipt> {
-        let url = self.rpc_url.clone();
+        tracing::debug!(?transaction, "Submitting transaction");
-        let wallet = self.wallet.clone();
+        let provider = self.provider();
-
+        let receipt = BlockingExecutor::execute(async move {
-        tracing::debug!("Submitting transaction: {transaction:#?}");
+            Ok(provider
-
-        tracing::info!("Submitting tx to kitchensink");
-        let receipt = execute_transaction(Box::pin(async move {
-            Ok(ProviderBuilder::new()
-                .network::<KitchenSinkNetwork>()
-                .wallet(wallet)
-                .connect(&url)
                 .await?
                 .send_transaction(transaction)
                 .await?
                 .get_receipt()
                 .await?)
-        }));
+        })?;
         tracing::info!(?receipt, "Submitted tx to kitchensink");
         receipt
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn trace_transaction(
         &self,
-        transaction: TransactionReceipt,
+        transaction: &TransactionReceipt,
+        trace_options: GethDebugTracingOptions,
     ) -> anyhow::Result<alloy::rpc::types::trace::geth::GethTrace> {
-        let url = self.rpc_url.clone();
+        let tx_hash = transaction.transaction_hash;
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            Ok(provider
+                .await?
+                .debug_trace_transaction(tx_hash, trace_options)
+                .await?)
+        })?
+    }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
+    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,
         });
-
-        let wallet = self.wallet.clone();
-
-        trace_transaction(Box::pin(async move {
-            Ok(ProviderBuilder::new()
-                .network::<KitchenSinkNetwork>()
-                .wallet(wallet)
-                .connect(&url)
-                .await?
-                .debug_trace_transaction(transaction.transaction_hash, trace_options)
-                .await?)
-        }))
-    }
-
-    fn state_diff(&self, transaction: TransactionReceipt) -> anyhow::Result<DiffMode> {
         match self
-            .trace_transaction(transaction)?
+            .trace_transaction(transaction, trace_options)?
             .try_into_pre_state_frame()?
         {
             PreStateFrame::Diff(diff) => Ok(diff),
@@ -310,17 +423,85 @@ impl EthereumNode for KitchensinkNode {
         }
     }
 
-    fn fetch_add_nonce(&self, address: Address) -> anyhow::Result<u64> {
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
-        let url = self.rpc_url.clone();
+    fn chain_id(&self) -> anyhow::Result<alloy::primitives::ChainId> {
-        let wallet = self.wallet.clone();
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider.await?.get_chain_id().await.map_err(Into::into)
+        })?
+    }
 
-        let onchain_nonce = fetch_onchain_nonce(url, wallet, address)?;
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
+    fn block_gas_limit(&self, number: BlockNumberOrTag) -> anyhow::Result<u128> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider
+                .await?
+                .get_block_by_number(number)
+                .await?
+                .ok_or(anyhow::Error::msg("Blockchain has no blocks"))
+                .map(|block| block.header.gas_limit)
+        })?
+    }
 
-        let mut nonces = self.nonces.lock().unwrap();
+    #[tracing::instrument(skip_all, fields(geth_node_id = self.id))]
-        let current = nonces.entry(address).or_insert(onchain_nonce);
+    fn block_coinbase(&self, number: BlockNumberOrTag) -> anyhow::Result<Address> {
-        let value = *current;
+        let provider = self.provider();
-        *current += 1;
+        BlockingExecutor::execute(async move {
-        Ok(value)
+            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))]
+    fn block_difficulty(&self, number: BlockNumberOrTag) -> anyhow::Result<U256> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn block_hash(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockHash> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn block_timestamp(&self, number: BlockNumberOrTag) -> anyhow::Result<BlockTimestamp> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            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))]
+    fn last_block_number(&self) -> anyhow::Result<BlockNumber> {
+        let provider = self.provider();
+        BlockingExecutor::execute(async move {
+            provider.await?.get_block_number().await.map_err(Into::into)
+        })?
     }
 }
 
@@ -329,38 +510,72 @@ impl Node for KitchensinkNode {
         let kitchensink_directory = config.directory().join(Self::BASE_DIRECTORY);
         let id = NODE_COUNT.fetch_add(1, Ordering::SeqCst);
         let base_directory = kitchensink_directory.join(id.to_string());
+        let logs_directory = base_directory.join(Self::LOGS_DIRECTORY);
+
+        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 {
             id,
             substrate_binary: config.kitchensink.clone(),
             eth_proxy_binary: config.eth_proxy.clone(),
             rpc_url: String::new(),
-            wallet: config.wallet(),
+            wallet,
             base_directory,
+            logs_directory,
             process_substrate: None,
             process_proxy: None,
-            nonces: Mutex::new(HashMap::new()),
+            nonce_manager: Default::default(),
+            // We know that we only need to be storing 4 files so we can specify that when creating
+            // the vector. It's the stdout and stderr of the substrate-node and the eth-rpc.
+            logs_file_to_flush: Vec::with_capacity(4),
         }
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn connection_string(&self) -> String {
         self.rpc_url.clone()
     }
 
-    fn shutdown(mut self) -> anyhow::Result<()> {
+    #[tracing::instrument(skip_all, fields(kitchensink_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.process_proxy.take() {
-            let _ = child.kill();
+            child
+                .kill()
+                .map_err(|error| anyhow::anyhow!("Failed to kill the proxy process: {error:?}"))?;
         }
         if let Some(mut child) = self.process_substrate.take() {
-            let _ = child.kill();
+            child.kill().map_err(|error| {
+                anyhow::anyhow!("Failed to kill the substrate 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(kitchensink_node_id = self.id))]
     fn spawn(&mut self, genesis: String) -> anyhow::Result<()> {
         self.init(&genesis)?.spawn_process()
     }
 
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn version(&self) -> anyhow::Result<String> {
         let output = Command::new(&self.substrate_binary)
             .arg("--version")
@@ -372,16 +587,20 @@ impl Node for KitchensinkNode {
             .stdout;
         Ok(String::from_utf8_lossy(&output).into())
     }
+
+    #[tracing::instrument(skip_all, fields(kitchensink_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() == "pvm"),
+        }
+    }
 }
 
 impl Drop for KitchensinkNode {
+    #[tracing::instrument(skip_all, fields(kitchensink_node_id = self.id))]
     fn drop(&mut self) {
-        if let Some(mut child) = self.process_proxy.take() {
+        self.shutdown().expect("Failed to shutdown")
-            let _ = child.kill();
-        }
-        if let Some(mut child) = self.process_substrate.take() {
-            let _ = child.kill();
-        }
     }
 }
 
@@ -431,6 +650,12 @@ impl TransactionBuilder<KitchenSinkNetwork> for <Ethereum as Network>::Transacti
         )
     }
 
+    fn take_nonce(&mut self) -> Option<u64> {
+        <<Ethereum as Network>::TransactionRequest as TransactionBuilder<Ethereum>>::take_nonce(
+            self,
+        )
+    }
+
     fn input(&self) -> Option<&alloy::primitives::Bytes> {
         <<Ethereum as Network>::TransactionRequest as TransactionBuilder<Ethereum>>::input(self)
     }
@@ -808,13 +1033,15 @@ impl BlockHeader for KitchenSinkHeader {
 
 #[cfg(test)]
 mod tests {
+    use alloy::rpc::types::TransactionRequest;
     use revive_dt_config::Arguments;
     use std::path::PathBuf;
+    use std::sync::{LazyLock, Mutex};
     use temp_dir::TempDir;
 
     use std::fs;
 
-    use super::KitchensinkNode;
+    use super::*;
     use crate::{GENESIS_JSON, Node};
 
     fn test_config() -> (Arguments, TempDir) {
@@ -829,6 +1056,66 @@ mod tests {
         (config, temp_dir)
     }
 
+    fn new_node() -> (KitchensinkNode, Arguments, TempDir) {
+        // Note: When we run the tests in the CI we found that if they're all
+        // run in parallel then the CI is unable to start all of the nodes in
+        // time and their start up times-out. Therefore, we want all of the
+        // nodes to be started in series and not in parallel. To do this, we use
+        // a dummy mutex here such that there can only be a single node being
+        // started up at any point of time. This will make our tests run slower
+        // but it will allow the node startup to not timeout.
+        //
+        // Note: an alternative to starting all of the nodes in series and not
+        // in parallel would be for us to reuse the same node between tests
+        // which is not the best thing to do in my opinion as it removes all
+        // of the isolation between tests and makes them depend on what other
+        // tests do. For example, if one test checks what the block number is
+        // and another test submits a transaction then the tx test would have
+        // side effects that affect the block number test.
+        static NODE_START_MUTEX: Mutex<()> = Mutex::new(());
+        let _guard = NODE_START_MUTEX.lock().unwrap();
+
+        let (args, temp_dir) = test_config();
+        let mut node = KitchensinkNode::new(&args);
+        node.init(GENESIS_JSON)
+            .expect("Failed to initialize the node")
+            .spawn_process()
+            .expect("Failed to spawn the node process");
+        (node, args, temp_dir)
+    }
+
+    /// A shared node that multiple tests can use. It starts up once.
+    fn shared_node() -> &'static KitchensinkNode {
+        static NODE: LazyLock<(KitchensinkNode, TempDir)> = LazyLock::new(|| {
+            let (node, _, temp_dir) = new_node();
+            (node, temp_dir)
+        });
+        &NODE.0
+    }
+
+    #[tokio::test]
+    async fn node_mines_simple_transfer_transaction_and_returns_receipt() {
+        // Arrange
+        let (node, args, _temp_dir) = new_node();
+
+        let provider = node.provider().await.expect("Failed to create provider");
+
+        let account_address = args.wallet().default_signer().address();
+        let transaction = TransactionRequest::default()
+            .to(account_address)
+            .value(U256::from(100_000_000_000_000u128));
+
+        // Act
+        let receipt = provider.send_transaction(transaction).await;
+
+        // Assert
+        let _ = receipt
+            .expect("Failed to send the transfer transaction")
+            .get_receipt()
+            .await
+            .expect("Failed to get the receipt for the transfer");
+    }
+
     #[test]
     fn test_init_generates_chainspec_with_balances() {
         let genesis_content = r#"
@@ -858,12 +1145,12 @@ mod tests {
         let contents = fs::read_to_string(&final_chainspec_path).expect("Failed to read chainspec");
 
         // Validate that the Substrate addresses derived from the Ethereum addresses are in the file
-        let first_eth_addr =
+        let first_eth_addr = KitchensinkNode::eth_to_substrate_address(
-            KitchensinkNode::eth_to_substrate_address("90F8bf6A479f320ead074411a4B0e7944Ea8c9C1")
+            &"90F8bf6A479f320ead074411a4B0e7944Ea8c9C1".parse().unwrap(),
-                .unwrap();
+        );
-        let second_eth_addr =
+        let second_eth_addr = KitchensinkNode::eth_to_substrate_address(
-            KitchensinkNode::eth_to_substrate_address("Ab8483F64d9C6d1EcF9b849Ae677dD3315835cb2")
+            &"Ab8483F64d9C6d1EcF9b849Ae677dD3315835cb2".parse().unwrap(),
-                .unwrap();
+        );
 
         assert!(
             contents.contains(&first_eth_addr),
@@ -891,7 +1178,7 @@ mod tests {
         let node = KitchensinkNode::new(&test_config().0);
 
         let result = node
-            .extract_balance_from_genesis_file(genesis_json)
+            .extract_balance_from_genesis_file(&serde_json::from_str(genesis_json).unwrap())
             .unwrap();
 
         let result_map: std::collections::HashMap<_, _> = result.into_iter().collect();
@@ -921,7 +1208,7 @@ mod tests {
         ];
 
         for eth_addr in eth_addresses {
-            let ss58 = KitchensinkNode::eth_to_substrate_address(eth_addr).unwrap();
+            let ss58 = KitchensinkNode::eth_to_substrate_address(&eth_addr.parse().unwrap());
 
             println!("Ethereum: {eth_addr} -> Substrate SS58: {ss58}");
         }
@@ -949,7 +1236,7 @@ mod tests {
         ];
 
         for (eth_addr, expected_ss58) in cases {
-            let result = KitchensinkNode::eth_to_substrate_address(eth_addr).unwrap();
+            let result = KitchensinkNode::eth_to_substrate_address(&eth_addr.parse().unwrap());
             assert_eq!(
                 result, expected_ss58,
                 "Mismatch for Ethereum address {eth_addr}"
@@ -990,4 +1277,89 @@ mod tests {
             "Expected eth-rpc version string, got: {version}"
         );
     }
+
+    #[test]
+    fn can_get_chain_id_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let chain_id = node.chain_id();
+
+        // Assert
+        let chain_id = chain_id.expect("Failed to get the chain id");
+        assert_eq!(chain_id, 420_420_420);
+    }
+
+    #[test]
+    fn can_get_gas_limit_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let gas_limit = node.block_gas_limit(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = gas_limit.expect("Failed to get the gas limit");
+    }
+
+    #[test]
+    fn can_get_coinbase_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let coinbase = node.block_coinbase(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = coinbase.expect("Failed to get the coinbase");
+    }
+
+    #[test]
+    fn can_get_block_difficulty_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let block_difficulty = node.block_difficulty(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = block_difficulty.expect("Failed to get the block difficulty");
+    }
+
+    #[test]
+    fn can_get_block_hash_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let block_hash = node.block_hash(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = block_hash.expect("Failed to get the block hash");
+    }
+
+    #[test]
+    fn can_get_block_timestamp_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let block_timestamp = node.block_timestamp(BlockNumberOrTag::Latest);
+
+        // Assert
+        let _ = block_timestamp.expect("Failed to get the block timestamp");
+    }
+
+    #[test]
+    fn can_get_block_number_from_node() {
+        // Arrange
+        let node = shared_node();
+
+        // Act
+        let block_number = node.last_block_number();
+
+        // Assert
+        let _ = block_number.expect("Failed to get the block number");
+    }
 }

crates/node/src/lib.rs

@@ -3,6 +3,8 @@
 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;
@@ -23,11 +25,15 @@ pub trait Node: EthereumNode {
     /// Prune the node instance and related data.
     ///
     /// Blocking until it's completely stopped.
-    fn shutdown(self) -> anyhow::Result<()>;
+    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/solc-binaries/src/download.rs

@@ -110,37 +110,25 @@ mod tests {
 
     #[test]
     fn try_get_windows() {
-        let version = List::download(List::WINDOWS_URL)
+        let version = List::download(List::WINDOWS_URL).unwrap().latest_release;
-            .unwrap()
-            .latest_release
-            .into();
         GHDownloader::windows(version).download().unwrap();
     }
 
     #[test]
     fn try_get_macosx() {
-        let version = List::download(List::MACOSX_URL)
+        let version = List::download(List::MACOSX_URL).unwrap().latest_release;
-            .unwrap()
-            .latest_release
-            .into();
         GHDownloader::macosx(version).download().unwrap();
     }
 
     #[test]
     fn try_get_linux() {
-        let version = List::download(List::LINUX_URL)
+        let version = List::download(List::LINUX_URL).unwrap().latest_release;
-            .unwrap()
-            .latest_release
-            .into();
         GHDownloader::linux(version).download().unwrap();
     }
 
     #[test]
     fn try_get_wasm() {
-        let version = List::download(List::WASM_URL)
+        let version = List::download(List::WASM_URL).unwrap().latest_release;
-            .unwrap()
-            .latest_release
-            .into();
         GHDownloader::wasm(version).download().unwrap();
     }
 }

genesis.json

@@ -35,7 +35,7 @@
     "timestamp": "0x00",
     "alloc": {
         "90F8bf6A479f320ead074411a4B0e7944Ea8c9C1": {
-            "balance": "1000000000000000000"
+            "balance": "10000000000000000000000"
         }
     }
 }