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70 lines
2.1 KiB
70 lines
2.1 KiB
/* @flow */
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import Web3 from 'web3';
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import type { Contract } from 'web3';
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import * as WEB3 from 'actions/constants/web3';
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import type { Action } from 'flowtype';
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import type { Web3UpdateBlockAction, Web3UpdateGasPriceAction } from 'actions/Web3Actions';
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export type Web3Instance = {
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network: string,
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web3: Web3,
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chainId: number,
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latestBlock: any,
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gasPrice: string,
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erc20: Contract,
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};
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export type State = Array<Web3Instance>;
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const initialState: State = [];
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const createWeb3 = (state: State, instance: Web3Instance): State => {
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const index: number = state.findIndex(w3 => w3.network === instance.network);
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const newState: Array<Web3Instance> = [...state];
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if (index >= 0) {
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newState[index] = instance;
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} else {
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newState.push(instance);
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}
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return newState;
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};
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const updateLatestBlock = (state: State, action: Web3UpdateBlockAction): State => {
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const index: number = state.findIndex(w3 => w3.network === action.network);
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const newState: Array<Web3Instance> = [...state];
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newState[index].latestBlock = action.blockHash;
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return newState;
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};
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const updateGasPrice = (state: State, action: Web3UpdateGasPriceAction): State => {
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const index: number = state.findIndex(w3 => w3.network === action.network);
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const newState: State = [...state];
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newState[index].gasPrice = action.gasPrice;
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return newState;
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};
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const disconnect = (state: State, instance: Web3Instance): State => {
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const index: number = state.indexOf(instance);
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const newState: Array<Web3Instance> = [...state];
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newState.splice(index, 1);
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return newState;
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};
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export default function web3(state: State = initialState, action: Action): State {
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switch (action.type) {
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case WEB3.CREATE:
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return createWeb3(state, action.instance);
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case WEB3.BLOCK_UPDATED:
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return updateLatestBlock(state, action);
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case WEB3.GAS_PRICE_UPDATED:
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return updateGasPrice(state, action);
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case WEB3.DISCONNECT:
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return disconnect(state, action.instance);
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default:
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return state;
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}
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}
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