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fix: erc-20 token transaction builder

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This commit is contained in:
Sérgio Salgado 2022-06-16 17:49:21 +01:00
parent 81caa2173a
commit 15e8e46c0f
1 changed files with 75 additions and 15 deletions
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90
lib/plugins/wallet/geth/base.js
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@ -52,6 +52,23 @@ function isStrictAddress (cryptoCode, toAddress, settings, operatorId) {
function sendCoins (account, tx, settings, operatorId) {
const { toAddress, cryptoAtoms, cryptoCode } = tx
const isErc20Token = coins.utils.isErc20Token(cryptoCode)
if (isErc20Token) {
return generateErc20Tx(toAddress, defaultWallet(account), cryptoAtoms, false, cryptoCode)
.then(pify(web3.eth.sendSignedTransaction))
.then(txid => {
return pify(web3.eth.getTransaction)(txid)
.then(tx => {
if (!tx) return { txid }
const fee = new BN(tx.gas).times(new BN(tx.gasPrice)).decimalPlaces(0)
return { txid, fee }
})
})
}
return generateTx(toAddress, defaultWallet(account), cryptoAtoms, false, cryptoCode)
.then(pify(web3.eth.sendSignedTransaction))
.then(txid => {
@ -97,17 +114,66 @@ function _balance (includePending, address, cryptoCode) {
.then(balance => balance ? BN(balance) : BN(0))
}
function generateErc20Tx (_toAddress, wallet, amount, includesFee, cryptoCode) {
const fromAddress = '0x' + wallet.getAddress().toString('hex')
const toAddress = coins.utils.getErc20Token(cryptoCode).contractAddress
const contract = new web3.eth.Contract(ABI.ERC20, toAddress)
const contractData = contract.methods.transfer(_toAddress.toLowerCase(), hex(amount))
const txTemplate = {
from: fromAddress,
to: toAddress,
value: hex(BN(0)),
data: contractData.encodeABI()
}
const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.London })
const promises = [
pify(contractData.estimateGas)(txTemplate),
pify(web3.eth.getTransactionCount)(fromAddress),
pify(web3.eth.getBlock)('pending')
]
return Promise.all(promises)
.then(([gas, txCount, { baseFeePerGas }]) => [
BN(gas),
_.max([0, txCount, lastUsedNonces[fromAddress] + 1]),
BN(baseFeePerGas)
])
.then(([gas, txCount, baseFeePerGas]) => {
lastUsedNonces[fromAddress] = txCount
const maxPriorityFeePerGas = new BN(web3.utils.toWei('2.5', 'gwei')) // web3 default value
const maxFeePerGas = new BN(2).times(baseFeePerGas).plus(maxPriorityFeePerGas)
const rawTx = {
chainId: 1,
nonce: txCount,
maxPriorityFeePerGas: web3.utils.toHex(maxPriorityFeePerGas),
maxFeePerGas: web3.utils.toHex(maxFeePerGas),
gasLimit: hex(gas),
to: toAddress,
from: fromAddress,
value: hex(BN(0)),
data: contractData.encodeABI()
}
const tx = FeeMarketEIP1559Transaction.fromTxData(rawTx, { common })
const privateKey = wallet.getPrivateKey()
const signedTx = tx.sign(privateKey)
return '0x' + signedTx.serialize().toString('hex')
})
}
function generateTx (_toAddress, wallet, amount, includesFee, cryptoCode) {
const fromAddress = '0x' + wallet.getAddress().toString('hex')
const isErc20Token = coins.utils.isErc20Token(cryptoCode)
const toAddress = isErc20Token ? coins.utils.getErc20Token(cryptoCode).contractAddress : _toAddress.toLowerCase()
let contract, contractData
if (isErc20Token) {
contract = new web3.eth.Contract(ABI.ERC20, toAddress)
contractData = isErc20Token && contract.methods.transfer(_toAddress.toLowerCase(), hex(toSend)).encodeABI()
}
const toAddress = _toAddress.toLowerCase()
const txTemplate = {
from: fromAddress,
@ -115,8 +181,6 @@ function generateTx (_toAddress, wallet, amount, includesFee, cryptoCode) {
value: amount.toString()
}
if (isErc20Token) txTemplate.data = contractData
const common = new Common({ chain: Chain.Mainnet, hardfork: Hardfork.London })
const promises = [
@ -151,11 +215,7 @@ function generateTx (_toAddress, wallet, amount, includesFee, cryptoCode) {
gasLimit: hex(gas),
to: toAddress,
from: fromAddress,
value: isErc20Token ? hex(BN(0)) : hex(toSend)
}
if (isErc20Token) {
rawTx.data = contractData
value: hex(toSend)
}
const tx = FeeMarketEIP1559Transaction.fromTxData(rawTx, { common })