metamask-extension/ui/app/selectors/confirm-transaction.js

import { createSelector } from 'reselect'
import txHelper from '../../lib/tx-helper'

const unapprovedTxsSelector = state => state.metamask.unapprovedTxs
const unapprovedMsgsSelector = state => state.metamask.unapprovedMsgs
const unapprovedPersonalMsgsSelector = state => state.metamask.unapprovedPersonalMsgs
const unapprovedTypedMessagesSelector = state => state.metamask.unapprovedTypedMessages
const networkSelector = state => state.metamask.network

export const unconfirmedTransactionsListSelector = createSelector(
  unapprovedTxsSelector,
  unapprovedMsgsSelector,
  unapprovedPersonalMsgsSelector,
  unapprovedTypedMessagesSelector,
  networkSelector,
  (
    unapprovedTxs = {},
    unapprovedMsgs = {},
    unapprovedPersonalMsgs = {},
    unapprovedTypedMessages = {},
    network
  ) => txHelper(
    unapprovedTxs,
    unapprovedMsgs,
    unapprovedPersonalMsgs,
    unapprovedTypedMessages,
    network
  ) || []
)

export const unconfirmedTransactionsHashSelector = createSelector(
  unapprovedTxsSelector,
  unapprovedMsgsSelector,
  unapprovedPersonalMsgsSelector,
  unapprovedTypedMessagesSelector,
  networkSelector,
  (
    unapprovedTxs = {},
    unapprovedMsgs = {},
    unapprovedPersonalMsgs = {},
    unapprovedTypedMessages = {},
    network
  ) => {
    const filteredUnapprovedTxs = Object.keys(unapprovedTxs).reduce((acc, address) => {
      const { metamaskNetworkId } = unapprovedTxs[address]
      const transactions = { ...acc }

      if (metamaskNetworkId === network) {
        transactions[address] = unapprovedTxs[address]
      }

      return transactions
    }, {})

    return {
      ...filteredUnapprovedTxs,
      ...unapprovedMsgs,
      ...unapprovedPersonalMsgs,
      ...unapprovedTypedMessages,
    }
  }
)

export const currentCurrencySelector = state => state.metamask.currentCurrency
export const conversionRateSelector = state => state.metamask.conversionRate