blockchain - solidity - foundry 5. script

refer to:

命令教程：https://book.getfoundry.sh/reference/forge/forge-script

具体的文字教程我居然没有找到。。。只能自行摸索了。

forge script 特别好用。可以把内容部署到网络并且调用。（实际上是先写好调用的内容，然后广播到网络上）

创建文件： 

script/Sum.s.sol  

注意：

1. 命名结尾是 xx.s.sol 

2. 必须包含 run() 函数

3. 必须继承 Script  ( contract xx is Script ... {} )

// SPDX-License-Identifier: UNLICENSED
import "forge-std/Script.sol";

pragma solidity ^0.8.0;
// 被执行的contract
contract Sum {
  uint public lastResult;
  // 被调用的方法
  function sum(uint a, uint b) public returns (uint) {
    uint result = a + b;
    lastResult = result;
    return result;
  }
}

// 这个就是script
contract CallSumScript is Script {
  function run() public {

    vm.startBroadcast();
    Sum sum = new Sum(); // 被调用的contract
    sum.sum(1,2);        // 被执行的方法

    vm.stopBroadcast();
  }
}

执行命令：

本地启动ganache, 然后执行dry-run（模拟运行）：

forge script script/Sum.s.sol:CallSumScript -vvvvv --private-key 0xb1d612d1bce91bc36bcd7b291e965c836f5b2fe6563aa5b983ff42a1c828eadb --fork-url http://192.168.0.105:7545

可以看到结果：

[⠃] Compiling...
[⠆] Compiling...
[⠆] Compiling 1 files with 0.8.25
[⠰] Solc 0.8.25 finished in 925.80ms
Compiler run successful!
EIP-3855 is not supported in one or more of the RPCs used.
Unsupported Chain IDs: 1337.
Contracts deployed with a Solidity version equal or higher than 0.8.20 might not work properly.
For more information, please see https://eips.ethereum.org/EIPS/eip-3855
Traces:
  [105860] CallSumScript::run()
    ├─ [0] VM::startBroadcast()
    │   └─ ← [Return]
    ├─ [47499] → new Sum@0x263A55Bcfb2721B25bbC0A7b33db52F82bc60b37
    │   └─ ← [Return] 237 bytes of code
    ├─ [22485] Sum::sum(1, 2)
    │   └─ ← [Return] 3
    ├─ [0] VM::stopBroadcast()
    │   └─ ← [Return]
    └─ ← [Stop]


Script ran successfully.

## Setting up 1 EVM.
==========================
Simulated On-chain Traces:

  [47499] → new Sum@0x263A55Bcfb2721B25bbC0A7b33db52F82bc60b37
    └─ ← [Return] 237 bytes of code

  [22485] Sum::sum(1, 2)
    └─ ← [Return] 3


==========================

Chain 1337

Estimated gas price: 5 gwei

Estimated total gas used for script: 196490

Estimated amount required: 0.00098245 ETH

==========================

SIMULATION COMPLETE. To broadcast these transactions, add --broadcast and wallet configuration(s) to the previous command. See forge script --help for more.

Transactions saved to: /mnt/c/workspace/test_foundry/broadcast/Sum.s.sol/1337/dry-run/run-latest.json

Sensitive values saved to: /mnt/c/workspace/test_foundry/cache/Sum.s.sol/1337/dry-run/run-latest.json

正式部署：

可以看到dry-run没问题。于是加上 --broadcast参数，广播它，使之生效：

forge script script/Sum.s.sol:CallSumScript -vvvvv --private-key 0xb1d612d1bce91bc36bcd7b291e965c836f5b2fe6563aa5b983ff42a1c828eadb --fork-url http://192.168.0.105:7545 --broadcast

进入到ganache gui, 可以看到结果：