Created
May 15, 2019 22:11
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const infura_token = '[[YOUR TOKEN]]' // ขอ infura token ได้ที่ infura.io (สมัครฟรี) | |
const privateKey = '0cb9dd3708cb7307eb6895183cafc18b13efd85e5f8f522832ce838da00245c3' | |
const publicKey = '0x19f0685F5FC36cc68328B730c63FD5E81514c704' | |
const gasPrice = '9' // gwei | |
const ethToSend = '0.001' // ether | |
const toAddress = '0x3CC0290E21A1Bf2CD6050a3139D17E6C4EF66416' | |
async function main() { | |
// โหลด web3 | |
const Web3 = require('web3') | |
// เชื่อมต่อไปยัง infura | |
const web3 = new Web3(new Web3.providers.HttpProvider(`https://kovan.infura.io/v3/${infura_token}`)) | |
// อ่านค่า nonce ณ ปัจจุบันเพื่อใช้สร้าง raw tx | |
// ค่า nonce เป็นค่า sequence number ที่จะต้องเรียงต่อกัน ตามจำนวนธุรกรรมของ address ผู้ส่ง | |
const nonce = await web3.eth.getTransactionCount(publicKey) | |
console.log('nonce', nonce) | |
// Raw tx | |
var rawTransaction = { | |
to: toAddress, | |
value: web3.utils.toWei(ethToSend, 'ether'), | |
gas: 100000, | |
gasPrice: web3.utils.toWei(gasPrice, 'gwei'), | |
nonce: nonce | |
} | |
// Sign ด้วย Private key | |
const signedTx = await web3.eth.accounts.signTransaction(rawTransaction, privateKey) | |
console.log('Signed Transaction', signedTx) | |
const receipt = await web3.eth.sendSignedTransaction(signedTx.rawTransaction) | |
console.log("Transaction receipt: ", receipt) | |
} | |
(async () => { | |
try { | |
var output = await main() | |
console.log(output) | |
} catch (e) { | |
// Deal with the fact the chain failed | |
console.log('error', e) | |
} | |
})() | |
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