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95 lines
2.9 KiB
95 lines
2.9 KiB
import { addHexPrefix, isValidAddress } from 'ethereumjs-util'
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const normalizers = {
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from: (from) => addHexPrefix(from),
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to: (to, lowerCase) => (lowerCase ? addHexPrefix(to).toLowerCase() : addHexPrefix(to)),
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nonce: (nonce) => addHexPrefix(nonce),
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value: (value) => addHexPrefix(value),
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data: (data) => addHexPrefix(data),
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gas: (gas) => addHexPrefix(gas),
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gasPrice: (gasPrice) => addHexPrefix(gasPrice),
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}
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/**
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* Normalizes the given txParams
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* @param {Object} txParams - The transaction params
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* @param {boolean} [lowerCase] - Whether to lowercase the 'to' address.
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* Default: true
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* @returns {Object} the normalized tx params
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*/
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export function normalizeTxParams (txParams, lowerCase = true) {
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// apply only keys in the normalizers
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const normalizedTxParams = {}
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for (const key in normalizers) {
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if (txParams[key]) {
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normalizedTxParams[key] = normalizers[key](txParams[key], lowerCase)
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}
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}
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return normalizedTxParams
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}
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/**
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* Validates the given tx parameters
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* @param {Object} txParams - the tx params
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* @throws {Error} if the tx params contains invalid fields
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*/
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export function validateTxParams (txParams) {
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validateFrom(txParams)
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validateRecipient(txParams)
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if ('value' in txParams) {
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const value = txParams.value.toString()
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if (value.includes('-')) {
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throw new Error(`Invalid transaction value of ${txParams.value} not a positive number.`)
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}
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if (value.includes('.')) {
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throw new Error(`Invalid transaction value of ${txParams.value} number must be in wei`)
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}
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}
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}
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/**
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* Validates the {@code from} field in the given tx params
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* @param {Object} txParams
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* @throws {Error} if the from address isn't valid
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*/
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export function validateFrom (txParams) {
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if (!(typeof txParams.from === 'string')) {
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throw new Error(`Invalid from address ${txParams.from} not a string`)
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}
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if (!isValidAddress(txParams.from)) {
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throw new Error('Invalid from address')
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}
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}
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/**
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* Validates the {@code to} field in the given tx params
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* @param {Object} txParams - the tx params
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* @returns {Object} the tx params
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* @throws {Error} if the recipient is invalid OR there isn't tx data
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*/
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export function validateRecipient (txParams) {
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if (txParams.to === '0x' || txParams.to === null) {
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if (txParams.data) {
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delete txParams.to
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} else {
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throw new Error('Invalid recipient address')
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}
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} else if (txParams.to !== undefined && !isValidAddress(txParams.to)) {
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throw new Error('Invalid recipient address')
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}
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return txParams
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}
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/**
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* Returns a list of final states
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* @returns {string[]} the states that can be considered final states
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*/
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export function getFinalStates () {
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return [
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'rejected', // the user has responded no!
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'confirmed', // the tx has been included in a block.
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'failed', // the tx failed for some reason, included on tx data.
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'dropped', // the tx nonce was already used
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]
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}
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