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import ethUtil from 'ethereumjs-util'
import MethodRegistry from 'eth-method-registry'
import abi from 'human-standard-token-abi'
import abiDecoder from 'abi-decoder'
import {
TRANSACTION_TYPE_CANCEL,
TRANSACTION_STATUS_CONFIRMED,
} from '../../../../app/scripts/controllers/transactions/enums'
import prefixForNetwork from '../../../lib/etherscan-prefix-for-network'
import {
TOKEN_METHOD_TRANSFER,
TOKEN_METHOD_APPROVE,
TOKEN_METHOD_TRANSFER_FROM,
SEND_ETHER_ACTION_KEY,
DEPLOY_CONTRACT_ACTION_KEY,
APPROVE_ACTION_KEY,
SEND_TOKEN_ACTION_KEY,
TRANSFER_FROM_ACTION_KEY,
SIGNATURE_REQUEST_KEY,
CONTRACT_INTERACTION_KEY,
CANCEL_ATTEMPT_ACTION_KEY,
} from '../constants/transactions'
import log from 'loglevel'
import { addCurrencies } from './conversion-util'
abiDecoder.addABI(abi)
export function getTokenData (data = '') {
return abiDecoder.decodeMethod(data)
}
const registry = new MethodRegistry({ provider: global.ethereumProvider })
/**
* Attempts to return the method data from the MethodRegistry library, if the method exists in the
* registry. Otherwise, returns an empty object.
* @param {string} data - The hex data (@code txParams.data) of a transaction
* @returns {Object}
*/
export async function getMethodData (data = '') {
const prefixedData = ethUtil.addHexPrefix(data)
const fourBytePrefix = prefixedData.slice(0, 10)
try {
const sig = await registry.lookup(fourBytePrefix)
if (!sig) {
return {}
}
const parsedResult = registry.parse(sig)
return {
name: parsedResult.name,
params: parsedResult.args,
}
} catch (error) {
log.error(error)
const contractData = getTokenData(data)
const { name } = contractData || {}
return { name }
}
}
export function isConfirmDeployContract (txData = {}) {
const { txParams = {} } = txData
return !txParams.to
}
/**
* Returns four-byte method signature from data
*
* @param {string} data - The hex data (@code txParams.data) of a transaction
* @returns {string} - The four-byte method signature
*/
export function getFourBytePrefix (data = '') {
const prefixedData = ethUtil.addHexPrefix(data)
const fourBytePrefix = prefixedData.slice(0, 10)
return fourBytePrefix
}
/**
* Returns the action of a transaction as a key to be passed into the translator.
* @param {Object} transaction - txData object
* @param {Object} methodData - Data returned from eth-method-registry
* @returns {string|undefined}
*/
export async function getTransactionActionKey (transaction, methodData) {
const { txParams: { data, to } = {}, msgParams, type } = transaction
if (type === 'cancel') {
return CANCEL_ATTEMPT_ACTION_KEY
}
if (msgParams) {
return SIGNATURE_REQUEST_KEY
}
if (isConfirmDeployContract(transaction)) {
return DEPLOY_CONTRACT_ACTION_KEY
}
if (data) {
const toSmartContract = await isSmartContractAddress(to)
if (!toSmartContract) {
return SEND_ETHER_ACTION_KEY
}
const { name } = methodData
const methodName = name && name.toLowerCase()
if (!methodName) {
return CONTRACT_INTERACTION_KEY
}
switch (methodName) {
case TOKEN_METHOD_TRANSFER:
return SEND_TOKEN_ACTION_KEY
case TOKEN_METHOD_APPROVE:
return APPROVE_ACTION_KEY
case TOKEN_METHOD_TRANSFER_FROM:
return TRANSFER_FROM_ACTION_KEY
default:
return undefined
}
} else {
return SEND_ETHER_ACTION_KEY
}
}
export function getLatestSubmittedTxWithNonce (transactions = [], nonce = '0x0') {
if (!transactions.length) {
return {}
}
return transactions.reduce((acc, current) => {
const { submittedTime, txParams: { nonce: currentNonce } = {} } = current
if (currentNonce === nonce) {
return acc.submittedTime
? submittedTime > acc.submittedTime ? current : acc
: current
} else {
return acc
}
}, {})
}
export async function isSmartContractAddress (address) {
const code = await global.eth.getCode(address)
// Geth will return '0x', and ganache-core v2.2.1 will return '0x0'
const codeIsEmpty = !code || code === '0x' || code === '0x0'
return !codeIsEmpty
}
export function sumHexes (...args) {
const total = args.reduce((acc, base) => {
return addCurrencies(acc, base, {
toNumericBase: 'hex',
})
})
return ethUtil.addHexPrefix(total)
}
/**
* Returns a status key for a transaction. Requires parsing the txMeta.txReceipt on top of
* txMeta.status because txMeta.status does not reflect on-chain errors.
* @param {Object} transaction - The txMeta object of a transaction.
* @param {Object} transaction.txReceipt - The transaction receipt.
* @returns {string}
*/
export function getStatusKey (transaction) {
const { txReceipt: { status: receiptStatus } = {}, type, status } = transaction
// There was an on-chain failure
if (receiptStatus === '0x0') {
return 'failed'
}
if (status === TRANSACTION_STATUS_CONFIRMED && type === TRANSACTION_TYPE_CANCEL) {
return 'cancelled'
}
return transaction.status
}
/**
* Returns an external block explorer URL at which a transaction can be viewed.
* @param {number} networkId
* @param {string} hash
* @param {Object} rpcPrefs
*/
export function getBlockExplorerUrlForTx (networkId, hash, rpcPrefs = {}) {
if (rpcPrefs.blockExplorerUrl) {
return `${rpcPrefs.blockExplorerUrl}/tx/${hash}`
}
const prefix = prefixForNetwork(networkId)
return `https://${prefix}etherscan.io/tx/${hash}`
}
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