以太坊私链部署智能合约

编写智能合约保存为test.sol

# 返回输入的平方
pragma solidity ^0.7.5;

contract test{
    function multiply(uint256 input) public returns(uint256 res){
        return input * input;
    }
}

安装solc，用于编译 .sol文件

npm install -g solc

编译，生成两个文件：.abi 和 .bin

solcjs test.sol --bin --abi --optimize -o ./

部署智能合约

# 在节点控制台输入abi = "此处为生成的.abi文件中的内容"
abi = [{"inputs":[{"internalType":"uint256","name":"input","type":"uint256"}],"name":"multiply","outputs":[{"internalType":"uint256","name":"res","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]

contract = eth.contract(abi)

# bytecode = "0x此处为.bin文件中的内容"
bytecode = "0x6080604052348015600f57600080fd5b5060948061001e6000396000f3fe6080                                                                  604052348015600f57600080fd5b506004361060285760003560e01c8063c6888fa114602d575b60                                                                  0080fd5b604760048036036020811015604157600080fd5b50356059565b60408051918252519081                                                                  900360200190f35b80029056fea26469706673582212209edf68a7757d17f0de352322d58f19264a                                                                  f9a5ec3493dfb6e71a3d0a69d4317264736f6c63430007050033"

initializer = {from: web3.eth.accounts[0], data: bytecode, gas:300000};

# 这里需要先解锁账户
personal.unlockAccount(eth.accounts[0],"你的密码")

token = contract.new(initializer)

# 然后启动挖矿,对合约地址进行确认，而后可以停止挖矿
miner.start(1)

与合约交互

# 获取合约地址
token.address
# "0xe5a8779a4fae7946a7c1c5ea7760b78d2c0b94dc"

abi = [{"inputs":[{"internalType":"uint256","name":"input","type":"uint256"}],"name":"multiply","outputs":[{"internalType":"uint256","name":"res","type":"uint256"}],"stateMutability":"nonpayable","type":"function"}]

# 获取合约对象
MyContract = eth.contract(abi)

# 实例化合约
myContract = MyContract.at("0xe5a8779a4fae7946a7c1c5ea7760b78d2c0b94dc")

# 调用， 返回结果：25
myContract.multiply.call(5)