Parity trie solidity implementation (2/3) (#162)

* init node header

* change directory structure to fix compilation issues

* node header

* init nodecodec

* nodecodec progress

* nodecodec progress

* nodebuilder and fixes

Signed-off-by: nadeemb53 <[email protected]>

* nodebuilder completion, bytes to uint8 array

* foundry x hardhat directory structure

* updated gitignore

* fix: lib visibility

* forge install: forge-std

* added forge-std as submodule

* scale codec scope

* scale codec little endian to int, compact to int decoding

* pr review fixes

* remove decodeHash implementation

Signed-off-by: nadeemb53 <[email protected]>

Author: nadeemb53

.gitignore

@@ -66,6 +66,10 @@ result
 lean-setup/
 
 # hardhat
-artifacts
-cache
-typechain-types
+artifacts/
+cache_hardhat/
+typechain-types/
+
+# foundry
+cache/
+out/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "contracts/ethereum/lib/forge-std"]
+	path = contracts/ethereum/lib/forge-std
+	url = https://github.com/foundry-rs/forge-std

contracts/ethereum/.gitmodules

@@ -0,0 +1,3 @@
+[submodule "lib/forge-std"]
+	path = lib/forge-std
+	url = https://github.com/foundry-rs/forge-std

contracts/ethereum/README.md

@@ -1,6 +1,21 @@
-## EVM-IBC
+# <h1 align="center"> EVM IBC </h1>
 
-```shell
+### Getting Started
+
+- Use Foundry:
+
+```bash
+forge install
+forge test
+```
+
+- Use Hardhat:
+
+```bash
+npm install
 npx hardhat test
-REPORT_GAS=true npx hardhat test
 ```
+
+### Notes
+
+Whenever you install new libraries using Foundry, make sure to update your `remappings.txt` file by running `forge remappings > remappings.txt`. This is required because we use `hardhat-preprocessor` and the `remappings.txt` file to allow Hardhat to resolve libraries you install with Foundry.

contracts/ethereum/contracts/trie-db/core/Codec.sol

@@ -0,0 +1,6 @@
+[profile.default]
+src = 'src'
+out = 'out'
+libs = ['lib']
+
+# See more config options https://github.com/foundry-rs/foundry/tree/master/config

contracts/ethereum/contracts/trie-db/core/Node.sol

@@ -1,16 +1,50 @@
-import { HardhatUserConfig } from "hardhat/config";
-import "@nomicfoundation/hardhat-toolbox";
+import fs from "fs";
+import "@nomiclabs/hardhat-waffle";
+import "@typechain/hardhat";
+import "hardhat-preprocessor";
+import { HardhatUserConfig, task } from "hardhat/config";
+
+import example from "./tasks/example";
+
+function getRemappings() {
+  return fs
+    .readFileSync("remappings.txt", "utf8")
+    .split("\n")
+    .filter(Boolean)
+    .map((line) => line.trim().split("="));
+}
+
+task("example", "Example task").setAction(example);
 
 const config: HardhatUserConfig = {
   solidity: {
     version: "0.8.17",
     settings: {
       optimizer: {
         enabled: true,
-        runs: 1000,
+        runs: 200,
       },
     },
   },
+  paths: {
+    sources: "./src", // Use ./src rather than ./contracts as Hardhat expects
+    cache: "./cache_hardhat", // Use a different cache for Hardhat than Foundry
+  },
+  // This fully resolves paths for imports in the ./lib directory for Hardhat
+  preprocess: {
+    eachLine: (hre) => ({
+      transform: (line: string) => {
+        if (line.match(/^\s*import /i)) {
+          getRemappings().forEach(([find, replace]) => {
+            if (line.match(find)) {
+              line = line.replace(find, replace);
+            }
+          });
+        }
+        return line;
+      },
+    }),
+  },
 };
 
 export default config;