metamask-extension/ui/app/selectors/send.js

import abi from 'human-standard-token-abi'
import { calcGasTotal } from '../pages/send/send.utils'
import {
  accountsWithSendEtherInfoSelector,
  getAddressBook,
  getSelectedAccount,
  getTargetAccount,
  getAveragePriceEstimateInHexWEI,
} from '.'

export function getBlockGasLimit(state) {
  return state.metamask.currentBlockGasLimit
}

export function getConversionRate(state) {
  return state.metamask.conversionRate
}

export function getNativeCurrency(state) {
  return state.metamask.nativeCurrency
}

export function getCurrentNetwork(state) {
  return state.metamask.network
}

export function getGasLimit(state) {
  return state.metamask.send.gasLimit || '0'
}

export function getGasPrice(state) {
  return state.metamask.send.gasPrice || getAveragePriceEstimateInHexWEI(state)
}

export function getGasTotal(state) {
  return calcGasTotal(getGasLimit(state), getGasPrice(state))
}

export function getPrimaryCurrency(state) {
  const sendToken = getSendToken(state)
  return sendToken?.symbol
}

export function getSendToken(state) {
  return state.metamask.send.token
}

export function getSendTokenAddress(state) {
  return getSendToken(state)?.address
}

export function getSendTokenContract(state) {
  const sendTokenAddress = getSendTokenAddress(state)
  return sendTokenAddress ? global.eth.contract(abi).at(sendTokenAddress) : null
}

export function getSendAmount(state) {
  return state.metamask.send.amount
}

export function getSendHexData(state) {
  return state.metamask.send.data
}

export function getSendHexDataFeatureFlagState(state) {
  return state.metamask.featureFlags.sendHexData
}

export function getSendEditingTransactionId(state) {
  return state.metamask.send.editingTransactionId
}

export function getSendErrors(state) {
  return state.send.errors
}

export function sendAmountIsInError(state) {
  return Boolean(state.send.errors.amount)
}

export function getSendFrom(state) {
  return state.metamask.send.from
}

export function getSendFromBalance(state) {
  const fromAccount = getSendFromObject(state)
  return fromAccount.balance
}

export function getSendFromObject(state) {
  const fromAddress = getSendFrom(state)
  return fromAddress
    ? getTargetAccount(state, fromAddress)
    : getSelectedAccount(state)
}

export function getSendMaxModeState(state) {
  return state.metamask.send.maxModeOn
}

export function getSendTo(state) {
  return state.metamask.send.to
}

export function getSendToNickname(state) {
  return state.metamask.send.toNickname
}

export function getSendToAccounts(state) {
  const fromAccounts = accountsWithSendEtherInfoSelector(state)
  const addressBookAccounts = getAddressBook(state)
  return [...fromAccounts, ...addressBookAccounts]
}
export function getTokenBalance(state) {
  return state.metamask.send.tokenBalance
}

export function getSendEnsResolution(state) {
  return state.metamask.send.ensResolution
}

export function getSendEnsResolutionError(state) {
  return state.metamask.send.ensResolutionError
}

export function getUnapprovedTxs(state) {
  return state.metamask.unapprovedTxs
}

export function getQrCodeData(state) {
  return state.appState.qrCodeData
}

export function getGasLoadingError(state) {
  return state.send.errors.gasLoading
}

export function gasFeeIsInError(state) {
  return Boolean(state.send.errors.gasFee)
}

export function getGasButtonGroupShown(state) {
  return state.send.gasButtonGroupShown
}

export function getTitleKey(state) {
  const isEditing = Boolean(getSendEditingTransactionId(state))
  const isToken = Boolean(getSendToken(state))

  if (!getSendTo(state)) {
    return 'addRecipient'
  }

  if (isEditing) {
    return 'edit'
  } else if (isToken) {
    return 'sendTokens'
  }
  return 'sendETH'
}

export function isSendFormInError(state) {
  return Object.values(getSendErrors(state)).some((n) => n)
}