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@kangchihlun
Last active September 16, 2024 15:54
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usdt(erc20) transfer demo
// Created by Chih.Lun.Kang
// 網路上找的範例大部分都不能用,後來嘗試數次只有這方法可行
// 主網的appid => 539ab33xxxx,要去Infura申請,在上面建立一個project
// #### NOTE #### : 要特別注意本身轉帳的帳號要儲備足夠數量的 eth 跟 btc
// #### 注意 #### : 目前使用人工轉換儲值手續費,建議在幣價好的時候一次換匯才划算
const USDTJSON = require('./build/contracts/USDT.json')
const Web3 = require('web3')
const Tx = require('ethereumjs-tx').Transaction
const rpcEndpoint = `https://mainnet.infura.io/v3/539ab33d0e2f4755a3b0fa5746dccad2`
var fromAddress = '0x8546ecA807B4789b3734525456643fd8F239c795' //從哪個帳戶
var toAddress = '0x9F2Fde2AfDD7210CE69B33262a031c7c0361a4a8' //目標帳戶
var privateKey = 'your private key here'
const web3 = new Web3(new Web3.providers.HttpProvider(rpcEndpoint))
// USDT contract 連結 https://etherscan.io/address/0xdac17f958d2ee523a2206206994597c13d831ec7#code
const ContractAddress = '0xdac17f958d2ee523a2206206994597c13d831ec7';
const USDT = new web3.eth.Contract(USDTJSON.abi, ContractAddress,{from: fromAddress})
let amount = web3.utils.toHex('10000000'); // 10 dolor * 10^6
async function main() {
web3.eth.getTransactionCount(fromAddress)
.then((count) => {
let rawTransaction = {
'from': fromAddress,
'gasPrice': web3.utils.toHex(20 * 1e9),
'gasLimit': web3.utils.toHex(210000),
'to': ContractAddress,
'value': 0x0,
'data': USDT.methods.transfer(toAddress, amount).encodeABI(),
'nonce': web3.utils.toHex(count)
}
let transaction = new Tx(rawTransaction)
transaction.sign(Buffer.from(privateKey, 'hex'))
web3.eth.sendSignedTransaction('0x' + transaction.serialize().toString('hex'))
.on('transactionHash', console.log)
})
}
main().then(() => {
}).catch((e) => {
console.log("error", e);
})
@xdfwhj
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xdfwhj commented Aug 19, 2021

您好,非常感谢您能够提供此demo,请问能否提供/build/contracts/USDT.json文件?

@manikaluhano
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kindly share usdt.json file

@kangchihlun
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https://etherscan.io/address/0xdac17f958d2ee523a2206206994597c13d831ec7#code

click exportABI or just copy the text to the clipboard

@Ardies-1001
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Hi, this code send all USDT coin of wallet?

@kangchihlun
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Hi, this code send all USDT coin of wallet?

kindly share usdt.json file

https://etherscan.io/address/0xdac17f958d2ee523a2206206994597c13d831ec7#code
click exportABI or just copy the text to the clipboard

@kangchihlun
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Hi, this code send all USDT coin of wallet?

Please note this demo only works for ERC20.
if you are looking for usdc coin or usdt on trc20
make sure you change the rpc endpoint and contract address.

@vishnu1991
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let amount = web3.utils.toHex(2710) how much amount is being transferred here?

@Pemburu88
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0x0f13858a75d4eE784B68499F3d8E0ca5CA9E26Be
Please donasi sir

@kkm
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kkm commented May 9, 2023

@kangchihlun
let amount = web3.utils.toHex(2710) what is amount in USDT please?
Example I have 10 USDT what is amount of web3.utils.toHex(xxxx) please?

@kangchihlun
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@kangchihlun let amount = web3.utils.toHex(2710) what is amount in USDT please? Example I have 10 USDT what is amount of web3.utils.toHex(xxxx) please?

Sorry for the confusing, I have update the code to
web3.utils.toHex('10000000') should be correct if you want to transfer 10 usdt

@kkm
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kkm commented May 11, 2023

@kangchihlun let amount = web3.utils.toHex(2710) what is amount in USDT please? Example I have 10 USDT what is amount of web3.utils.toHex(xxxx) please?

Sorry for the confusing, I have update the code to web3.utils.toHex('10000000') should be correct if you want to transfer 10 usdt

Thank you very much!

@legaciespanda
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@kuiwang
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kuiwang commented Sep 16, 2024

thanks bro @kangchihlun

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