ui/app/selectors/tokens.js


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import { createSelector } from 'reselect'

export const selectedTokenAddressSelector = state => state.metamask.selectedTokenAddress
export const tokenSelector = state => state.metamask.tokens
export const selectedTokenSelector = createSelector(
  tokenSelector,
  selectedTokenAddressSelector,
  (tokens = [], selectedTokenAddress = '') => {
    return tokens.find(({ address }) => address === selectedTokenAddress)
  }
)