MacOS 安装 solidity_macos solc

1. 安装node

brew install node

2. 安装solc，solc-cli

npm install -g solc
npm install -g solc-cli

3. 安装solidity

brew tap ethereum/ethereum
brew install solidity
brew link --overwrite solidity

4. 写一个简单的合约并保存为demo.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.9;
 
contract MyContract {
    uint256 public myNumber; // 状态变量
 
    modifier onlyOwner() { // 修改器
        require(msg.sender == owner, "Only owner can call this function.");
        _;
    }
 
    address public owner; // 状态变量
 
    constructor() { // 构造函数
        owner = msg.sender;
        myNumber = 42;
    }
 
    function setNumber(uint256 _number) public onlyOwner { // 设置状态变量值的函数
        myNumber = _number;
    }
}

5. 生成abi文件

solc --abi demo.sol -o build/

[
    {
        "inputs": [
 
        ],
        "stateMutability": "nonpayable",
        "type": "constructor"
    },
    {
        "inputs": [
 
        ],
        "name": "myNumber",
        "outputs": [
            {
                "internalType": "uint256",
                "name": "",
                "type": "uint256"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
 
        ],
        "name": "owner",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "uint256",
                "name": "_number",
                "type": "uint256"
            }
        ],
        "name": "setNumber",
        "outputs": [
 
        ],
        "stateMutability": "nonpayable",
        "type": "function"
    }
]