101 lines
2.5 KiB
JavaScript
101 lines
2.5 KiB
JavaScript
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// Description:
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// Ethereum token payment logic
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//
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// Dependencies:
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// ethers: "^3.0.8",
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//
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// Author:
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// PombeirP
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const ethers = require('ethers')
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const { Wallet, Contract, providers } = ethers
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const ERC20_ABI = [
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{
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'constant': false,
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'inputs': [
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{
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'name': '_to',
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'type': 'address'
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},
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{
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'name': '_amount',
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'type': 'uint256'
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}
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],
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'name': 'transfer',
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'outputs': [
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{
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'name': 'success',
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'type': 'bool'
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}
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],
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'payable': false,
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'type': 'function'
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}
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]
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module.exports = {
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getContract: _getContract,
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transfer: _transfer
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}
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let transaction = null
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let hash = null
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function _getContract (contractAddress, privateKey, networkId) {
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const network = providers.Provider.getNetwork(networkId)
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const wallet = new Wallet(privateKey, ethers.providers.getDefaultProvider(network))
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async function customSendTransaction (tx) {
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hash = await wallet.provider.sendTransaction(tx)
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return hash
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}
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async function customSignTransaction (tx) {
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transaction = tx
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return wallet.sign(tx)
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}
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const customSigner = _getCustomSigner(wallet, customSignTransaction, customSendTransaction)
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const contract = new Contract(contractAddress, ERC20_ABI, customSigner)
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return { contract: contract, wallet: wallet }
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}
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async function _transfer (contract, wallet, pubkey, tokenAmount) {
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const bigNumberAmount = ethers.utils.parseUnits(tokenAmount.toString(), 'ether')
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await contract.transfer(pubkey, bigNumberAmount)
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transaction.hash = hash
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transaction.from = wallet.address
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transaction.value = bigNumberAmount
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return transaction
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}
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function _getCustomSigner (wallet, signTransaction, sendTransaction) {
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const provider = wallet.provider
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async function getAddress () { return wallet.address }
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async function resolveName (addressOrName) { return provider.resolveName(addressOrName) }
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async function estimateGas (transaction) { return provider.estimateGas(transaction) }
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async function getGasPrice () { return process.env.DEBUG ? 5000000 : provider.getGasPrice() }
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async function getTransactionCount (blockTag) { return provider.getTransactionCount(blockTag) }
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const customSigner = {
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getAddress: getAddress,
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provider: {
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resolveName: resolveName,
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estimateGas: estimateGas,
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getGasPrice: getGasPrice,
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getTransactionCount: getTransactionCount,
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sendTransaction: sendTransaction
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},
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sign: signTransaction
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}
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return customSigner
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}
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