83 lines
2.3 KiB
TypeScript
83 lines
2.3 KiB
TypeScript
import BN from 'bn.js';
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import {
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FieldAction,
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TypeKeys as TK,
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SwapTokenToEtherAction,
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SwapEtherToTokenAction,
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SwapTokenToTokenAction,
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SwapAction,
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ResetAction
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} from 'actions/transaction';
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import { Reducer } from 'redux';
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import { State } from './typings';
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import { gasPricetoBase } from 'libs/units';
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const INITIAL_STATE: State = {
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to: { raw: '', value: null },
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data: { raw: '', value: null },
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nonce: { raw: '', value: null },
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value: { raw: '', value: null },
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gasLimit: { raw: '21000', value: new BN(21000) },
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gasPrice: { raw: '21', value: gasPricetoBase(21) }
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};
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const updateField = (key: keyof State): Reducer<State> => (state: State, action: FieldAction) => ({
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...state,
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[key]: { ...state[key], ...action.payload }
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});
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const tokenToEther = (
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state: State,
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{ payload: { decimal: _, ...rest } }: SwapTokenToEtherAction
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): State => ({
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...state,
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...rest,
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data: INITIAL_STATE.data
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});
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const etherToToken = (
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state: State,
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{ payload: { decimal: _, tokenTo: __, tokenValue: ___, ...rest } }: SwapEtherToTokenAction
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): State => ({
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...state,
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...rest,
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value: INITIAL_STATE.value
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});
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const tokenToToken = (
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state: State,
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{ payload: { decimal: _, tokenValue: __, ...rest } }: SwapTokenToTokenAction
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): State => ({ ...state, ...rest });
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const reset = (state: State): State => ({ ...INITIAL_STATE, gasPrice: state.gasPrice });
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export const fields = (
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state: State = INITIAL_STATE,
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action: FieldAction | SwapAction | ResetAction
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) => {
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switch (action.type) {
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case TK.TO_FIELD_SET:
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return updateField('to')(state, action);
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case TK.VALUE_FIELD_SET:
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return updateField('value')(state, action);
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case TK.DATA_FIELD_SET:
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return updateField('data')(state, action);
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case TK.GAS_LIMIT_FIELD_SET:
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return updateField('gasLimit')(state, action);
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case TK.NONCE_FIELD_SET:
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return updateField('nonce')(state, action);
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case TK.GAS_PRICE_FIELD_SET:
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return updateField('gasPrice')(state, action);
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case TK.TOKEN_TO_ETHER_SWAP:
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return tokenToEther(state, action);
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case TK.ETHER_TO_TOKEN_SWAP:
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return etherToToken(state, action);
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case TK.TOKEN_TO_TOKEN_SWAP:
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return tokenToToken(state, action);
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case TK.RESET:
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return reset(state);
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default:
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return state;
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}
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};
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