trezor-wallet/src/js/reducers/SelectedAccountReducer.js

/* @flow */
'use strict';

import * as ACCOUNT from '../actions/constants/account';

import type { 
    Action, 
    Account,
    Coin,
    Token,
    PendingTx,
    Discovery,
    Web3Instance
} from '~/flowtype';

export type State = {
    location?: string;

    account: ?Account;
    network: ?Coin;
    tokens: Array<Token>,
    pending: Array<PendingTx>,
    web3: ?Web3Instance,
    discovery: ?Discovery
};

export const initialState: State = {
    location: '/',
    account: null,
    network: null,
    tokens: [],
    pending: [],
    web3: null,
    discovery: null
};

export default (state: State = initialState, action: Action): State => {

    switch (action.type) {

        case ACCOUNT.UPDATE_SELECTED_ACCOUNT :
            return action.payload;

        default:
            return state;
    }

}