Created
December 13, 2016 09:32
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Compiling and deploying an Ethereum Smart Contract, using solc and web3.
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const fs = require('fs'); | |
const solc = require('solc'); | |
const Web3 = require('web3'); | |
// Connect to local Ethereum node | |
const web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545")); | |
// Compile the source code | |
const input = fs.readFileSync('Token.sol'); | |
const output = solc.compile(input.toString(), 1); | |
const bytecode = output.contracts['Token'].bytecode; | |
const abi = JSON.parse(output.contracts['Token'].interface); | |
// Contract object | |
const contract = web3.eth.contract(abi); | |
// Deploy contract instance | |
const contractInstance = contract.new({ | |
data: '0x' + bytecode, | |
from: web3.eth.coinbase, | |
gas: 90000*2 | |
}, (err, res) => { | |
if (err) { | |
console.log(err); | |
return; | |
} | |
// Log the tx, you can explore status with eth.getTransaction() | |
console.log(res.transactionHash); | |
// If we have an address property, the contract was deployed | |
if (res.address) { | |
console.log('Contract address: ' + res.address); | |
// Let's test the deployed contract | |
testContract(res.address); | |
} | |
}); | |
// Quick test the contract | |
function testContract(address) { | |
// Reference to the deployed contract | |
const token = contract.at(address); | |
// Destination account for test | |
const dest_account = '0x002D61B362ead60A632c0e6B43fCff4A7a259285'; | |
// Assert initial account balance, should be 100000 | |
const balance1 = token.balances.call(web3.eth.coinbase); | |
console.log(balance1 == 1000000); | |
// Call the transfer function | |
token.transfer(dest_account, 100, {from: web3.eth.coinbase}, (err, res) => { | |
// Log transaction, in case you want to explore | |
console.log('tx: ' + res); | |
// Assert destination account balance, should be 100 | |
const balance2 = token.balances.call(dest_account); | |
console.log(balance2 == 100); | |
}); | |
} |
@ADitya024
Change it to:
output.contracts['Token']["bytecode"];
Hi guys,
I am currently trying to adopt this source code for my school project. But may I know what is the folder structure for this project? Because I can't seemed to grasp how the code retrieve the Token.sol
(Line 9)
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Hello guys,
I am facing a error : TypeError: Cannot read property 'bytecode' of undefined
occuring on line : const bytecode = output.contracts['Token'].bytecode;