feat(examples): WETH9 Precompile Script Example

.gitmodules

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

Justfile

@@ -49,3 +49,7 @@ clippy:
 # Build for the native target
 build *args='':
   cargo build --workspace --all $@
+
+# Generates all test fixtures for scripts in examples/exec-scripts
+gen fork_url:
+  @just ./examples/exec-scripts/gen {{fork_url}}

examples/exec-scripts/.github/workflows/test.yml

@@ -0,0 +1,34 @@
+name: test
+
+on: workflow_dispatch
+
+env:
+  FOUNDRY_PROFILE: ci
+
+jobs:
+  check:
+    strategy:
+      fail-fast: true
+
+    name: Foundry project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Install Foundry
+        uses: foundry-rs/foundry-toolchain@v1
+        with:
+          version: nightly
+
+      - name: Run Forge build
+        run: |
+          forge --version
+          forge build --sizes
+        id: build
+
+      - name: Run Forge tests
+        run: |
+          forge test -vvv
+        id: test

examples/exec-scripts/.gitignore

@@ -0,0 +1,14 @@
+# Compiler files
+cache/
+out/
+
+# Ignores development broadcast logs
+broadcast
+/broadcast/*/31337/
+/broadcast/**/dry-run/
+
+# Docs
+docs/
+
+# Dotenv file
+.env

examples/exec-scripts/Justfile

@@ -0,0 +1,21 @@
+set positional-arguments
+# default recipe to display help information
+default:
+  @just --list
+
+# Installs the opt8n binary
+install-opt8n:
+  cargo install --path ../../bin/opt8n --locked
+
+# Cleans build artifacts and cache
+forge-updates:
+  @forge clean
+  @forge update
+
+# Generates all execution test fixtures for scripts in this project
+gen fork_url: install-opt8n forge-updates
+  just gen-weth9 {{fork_url}}
+
+# Generates the execution test fixture for the weth9 precompile script
+gen-weth9 fork_url: install-opt8n forge-updates
+  opt8n --output ../../fixtures/execution/Weth9Precompile.json --fork-url {{fork_url}} script Weth9Precompile

examples/exec-scripts/README.md

@@ -0,0 +1,66 @@
+## Foundry
+
+**Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.**
+
+Foundry consists of:
+
+-   **Forge**: Ethereum testing framework (like Truffle, Hardhat and DappTools).
+-   **Cast**: Swiss army knife for interacting with EVM smart contracts, sending transactions and getting chain data.
+-   **Anvil**: Local Ethereum node, akin to Ganache, Hardhat Network.
+-   **Chisel**: Fast, utilitarian, and verbose solidity REPL.
+
+## Documentation
+
+https://book.getfoundry.sh/
+
+## Usage
+
+### Build
+
+```shell
+$ forge build
+```
+
+### Test
+
+```shell
+$ forge test
+```
+
+### Format
+
+```shell
+$ forge fmt
+```
+
+### Gas Snapshots
+
+```shell
+$ forge snapshot
+```
+
+### Anvil
+
+```shell
+$ anvil
+```
+
+### Deploy
+
+```shell
+$ forge script script/Counter.s.sol:CounterScript --rpc-url <your_rpc_url> --private-key <your_private_key>
+```
+
+### Cast
+
+```shell
+$ cast <subcommand>
+```
+
+### Help
+
+```shell
+$ forge --help
+$ anvil --help
+$ cast --help
+```

examples/exec-scripts/foundry.toml

@@ -0,0 +1,6 @@
+[profile.default]
+src = "src"
+out = "out"
+libs = ["lib"]
+
+# See more config options https://github.com/foundry-rs/foundry/blob/master/crates/config/README.md#all-options

examples/exec-scripts/script/Weth9Precompile.s.sol

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import {Script} from "forge-std/Script.sol";
+import { StdAssertions } from "forge-std/StdAssertions.sol";
+
+interface Weth9 {
+    function name() external view returns (string memory);
+    function symbol() external view returns (string memory);
+    function decimals() external pure returns (uint8);
+    function balanceOf(address owner) external view returns (uint256);
+    function allowance(address owner, address spender) external view returns (uint256);
+    function deposit() external payable;
+    function withdraw(uint256 wad) external;
+}
+
+/// Calls the WETH9 Precompile
+contract Weth9Precompile is Script, StdAssertions {
+
+  Weth9 constant WETH9 = Weth9(address(0x4200000000000000000000000000000000000006));
+
+  function setUp() public {}
+
+  function run() public {
+    // Validate Weth9 Precompile Metadata
+    assertEq(WETH9.name(), "Wrapped Ether");
+    assertEq(WETH9.symbol(), "WETH");
+    assertEq(WETH9.decimals(), 18);
+
+    // Deposit 1 Ether
+    vm.broadcast();
+    WETH9.deposit{value: 1 ether}();
+    assertEq(WETH9.balanceOf(address(this)), 1 ether);
+
+    // Withdraw 1 Ether
+    vm.broadcast();
+    WETH9.withdraw(1 ether);
+    assertEq(WETH9.balanceOf(address(this)), 0);
+  }
+}

fixtures/execution/Weth9Precompile.json

@@ -0,0 +1,93 @@
+{
+  "env": {
+    "currentCoinbase": "0x0000000000000000000000000000000000000000",
+    "currentDifficulty": "0x7642a519106489a25ccce64b86090c8e7db9372f32e9eda11200bd1c717f2625",
+    "currentGasLimit": "0x1c9c380",
+    "previousHash": "0xcf51399fdee5e4825ae91080390d0aa107c460e1056792ff0800ae02538825d3",
+    "currentNumber": "0x759ffd8",
+    "currentTimestamp": "0x66a7d969"
+  },
+  "alloc": {
+    "0x4200000000000000000000000000000000000006": {
+      "balance": "0x86ab06629fccad08705",
+      "code": "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"
+    },
+    "0xa0ee7a142d267c1f36714e4a8f75612f20a79720": {
+      "balance": "0x21e19e0c9bab2400000"
+    },
+    "0x0000000000000000000000000000000000000000": {
+      "balance": "0x117b08b474fb13e6",
+      "nonce": 3
+    }
+  },
+  "outAlloc": {
+    "0xa0ee7a142d267c1f36714e4a8f75612f20a79720": {
+      "balance": "0x21e0c0012fca42e977a",
+      "nonce": 1
+    },
+    "0x0000000000000000000000000000000000000000": {
+      "balance": "0x117b08bb864b91a6"
+    },
+    "0x4200000000000000000000000000000000000006": {
+      "balance": "0x86abe46e0b072348705",
+      "storage": {
+        "0x6a706e96617ceafd46f24757f71aad32b88c8bf0b8ae22ec3de611582d2d4a6c": "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000"
+      }
+    }
+  },
+  "txs": [
+    {
+      "EIP1559": {
+        "chainId": "0xa",
+        "nonce": "0x0",
+        "gasLimit": "0x10050",
+        "maxFeePerGas": "0x13742c",
+        "maxPriorityFeePerGas": "0xa52e0",
+        "to": "0x4200000000000000000000000000000000000006",
+        "value": "0xde0b6b3a7640000",
+        "accessList": [],
+        "input": "0xd0e30db0",
+        "r": "0xf59b22eebd70918b8c00865574d3c50a2ea431e3b305bf1d3dbc6cd9fb5f473d",
+        "s": "0x4063dd1731c08ec0983dc4be06d4f134528549b08464bed5ba3f367750939ea6",
+        "yParity": "0x1",
+        "hash": "0x09f71cc85e9af7422e76d7db6d9510b85a627f5972f150a0d8727fd2f1eb6cc8"
+      }
+    }
+  ],
+  "result": {
+    "stateRoot": "0x0000000000000000000000000000000000000000000000000000000000000000",
+    "txRoot": "0x39195e50de80168acf9316a7ebd991daca9ca041faebe8355153c3ac5212ad89",
+    "receiptRoot": "0xc4b290f69c74db3a91e2758c1489a26e40885f0e07e93a5158ffbb86ddbe36c0",
+    "logsBloom": "0x00000000000000000000040000000000000000000000000000040000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000400000000000000000",
+    "receipts": [
+      {
+        "root": "0x0000000000000000000000000000000000000000000000000000000000000000",
+        "transactionHash": "0x09f71cc85e9af7422e76d7db6d9510b85a627f5972f150a0d8727fd2f1eb6cc8",
+        "gasUsed": "0xaf42",
+        "blockHash": "0x32da196d87e53a77c0aef14839a1272afac5757efc3f99a29c90149a1000c4bb",
+        "transactionIndex": "0x0",
+        "type": "0x2",
+        "status": "0x1",
+        "cumulativeGasUsed": "0xaf42",
+        "logs": [
+          {
+            "address": "0x4200000000000000000000000000000000000006",
+            "topics": [
+              "0xe1fffcc4923d04b559f4d29a8bfc6cda04eb5b0d3c460751c2402c5c5cc9109c",
+              "0x000000000000000000000000a0ee7a142d267c1f36714e4a8f75612f20a79720"
+            ],
+            "data": "0x0000000000000000000000000000000000000000000000000de0b6b3a7640000",
+            "blockHash": "0x32da196d87e53a77c0aef14839a1272afac5757efc3f99a29c90149a1000c4bb",
+            "blockNumber": "0x759ffd8",
+            "blockTimestamp": "0x66a7d969",
+            "transactionHash": "0x09f71cc85e9af7422e76d7db6d9510b85a627f5972f150a0d8727fd2f1eb6cc8",
+            "transactionIndex": "0x0",
+            "logIndex": "0x0",
+            "removed": false
+          }
+        ],
+        "logsBloom": "0x00000000000000000000040000000000000000000000000000040000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000400000000000000000"
+      }
+    ]
+  }
+}