Compile a smart contract

compile.js

const fs = require('fs');
const solc = require('solc');

---- connect的部分省略 ----

/*
* Compile Contract and Fetch ABI, bytecode
*/ 
let source = fs.readFileSync("./contracts/BasicToken.sol", 'utf8');
console.log('compiling contract...');
let compiledContract = solc.compile(source);
console.log('done');
for (let contractName in compiledContract.contracts) {
    // code and ABI that are needed by web3 
    // console.log(contractName + ': ' + compiledContract.contracts[contractName].bytecode);
    // console.log(contractName + '; ' + JSON.parse(compiledContract.contracts[contractName].interface));
    var bytecode = compiledContract.contracts[contractName].bytecode;
    var abi = JSON.parse(compiledContract.contracts[contractName].interface);
}

console.log(JSON.stringify(abi, undefined, 2));