Proof of concept: Add a new runtime that uses pallet_contracts (#186)

* seal: Copy over a legacy version of pallet_contracts from substrate

* seal: Fix substrate dependency pathes and add as dependency to runtime

* seal: Adapt pallet to current substrate version

* seal: Add contracts pallet to runtime

* seal: Implement rpc runtime api

* seal: Update to latest rpc output format

* seal: Replace child trie by prefix trie

* seal: Add contracts endpoint to the client

* seal: fixup rpc test

* Fix whitespace issue

Co-authored-by: Sergei Shulepov <sergei@parity.io>

* seal: Move pallet out of the runtime directory

* seal: Create a seperate runtime for contracts

* Move parachains to top level directory

* seal: Disable rent for easier testing

Co-authored-by: Sergei Shulepov <sergei@parity.io>

cumulus/rococo-parachains/pallets/contracts/common/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "pallet-contracts-primitives"
+version = "2.0.0-rc3"
+authors = ["Parity Technologies <admin@parity.io>"]
+edition = "2018"
+license = "Apache-2.0"
+homepage = "https://substrate.dev"
+repository = "https://github.com/paritytech/substrate/"
+description = "A crate that hosts a common definitions that are relevant for the pallet-contracts."
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+
+[dependencies]
+# This crate should not rely on any of the frame primitives.
+codec = { package = "parity-scale-codec", version = "1.3.1", default-features = false, features = ["derive"] }
+sp-std = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "rococo-branch" }
+sp-runtime = { git = "https://github.com/paritytech/substrate", default-features = false, branch = "rococo-branch" }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"sp-runtime/std",
+	"sp-std/std",
+]