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Update transfer.js #8

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82 changes: 0 additions & 82 deletions src/transfer.js
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Original file line number Diff line number Diff line change
@@ -1,83 +1 @@
const fs = require('fs');
const path = require('path');

const Accounts = require('web3-eth-accounts');
const Eth = require('web3-eth');
const Web3 = require('web3');
const BN = Web3.utils.BN;

const pretty = require('./pretty');
const erc20Abi = require('./ERC20.abi.json');

const web3Provider = () => {
return Eth.giveProvider || 'https://mainnet-rpc.thundercore.com';
//return Eth.giveProvider || 'http://localhost:9545';
}

const signTx = async (fromAccount, tx) => {
const signedTx = await fromAccount.signTransaction(tx)
return signedTx.rawTransaction // hex string
}

class ChainHelper {
constructor(eth, chainId, fromAccount) {
this.eth = eth;
this.chainId = chainId;
this.fromAccount = fromAccount;
this.fromAddress = fromAccount.address;
}
async submitTx(toAddress, value, txData) {
const eth = this.eth;
const promiseResults = await Promise.all([
eth.getTransactionCount(this.fromAccount.address),
eth.getGasPrice(),
]);
const nonce = promiseResults[0];
const gasPrice = promiseResults[1];
const fromAddress = this.fromAddress;
const tx = {
'gasLimit': 0,
'chainId': this.chainId,
'gasPrice': gasPrice,
'nonce': nonce,
'from': fromAddress,
'to': toAddress,
'value': value,
'data': txData,
}
const gasMultiple = new BN(1.0);
tx.gasLimit = '0x' + (new BN(await eth.estimateGas(tx))).mul(gasMultiple).toString(16);
console.log('tx:', pretty.format(tx));
const rawTxStr = await signTx(this.fromAccount, tx);
return eth.sendSignedTransaction(rawTxStr);
}
async transferToken (contractAddress, toAddress, value) {
const eth = this.eth;
const contractAbi = erc20Abi;
const contract = new eth.Contract(contractAbi, contractAddress);
const txData = contract.methods.transfer(toAddress, value).encodeABI();
return this.submitTx(contractAddress, 0, txData);
}
}

const create = async (privateKey) => {
const accounts = new Accounts();
if (!privateKey.startsWith('0x')) {
privateKey = '0x' + privateKey;
}
const account = accounts.privateKeyToAccount(privateKey);
const eth = new Eth(web3Provider());
const networkId = await eth.net.getId();
return new ChainHelper(eth, networkId, account);
}

const readKeys = () => {
const privateKeys = fs.readFileSync(path.join(__dirname, '..', '.private-keys'),
{encoding: 'ascii'}).split('\n').filter(x => x.length > 0);
return privateKeys;
}

module.exports = {
create: create,
readKeys: readKeys,
};