web3使用

Posted 2022-12-09 geyiwei-suzhou

智能合约编译abi及java接口

solc ./contract/Market.sol --abi --bin -o ./contract --overwrite
web3j generate solidity -b ./contract/Market.bin -a ./contract/Market.abi -o ./src/main/java -p com.market.contract

合约调用

var Web3 = require('web3');
var web3 = new Web3(new Web3.providers.HttpProviders("http://localhost:8545"));

var _from = web3.eth.account[0];
var _to = web3.eth.account[1];
var _amount = 50000;

var abi = [....];
var CoinContract = web3.eth.contract(abi);
var contractAddress = "0x...."
var contractInstance = CoinContract.at(contractAddress);

web3.personal.unlockAccount(_from, '123456', (err, res) => 
	if (err)
		console.log('Error: ', err);
	else
		contractInstance.send(_to, amount, from: _from, (err, res) => 
			if (err)
				console.log('Error: ', err);
			else
				console.log('Result: ', res);
		);
);