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import * as _ from 'lodash';
import {constants} from 'ts/utils/constants';
import Web3 = require('web3');
/*
* This class implements the web3-provider-engine subprovider interface and forwards
* requests involving user accounts (getAccounts, sendTransaction, etc...) to the injected
* web3 instance in their browser.
* Source: https://github.com/MetaMask/provider-engine/blob/master/subproviders/subprovider.js
*/
export class InjectedWeb3SubProvider {
private injectedWeb3: Web3;
constructor(injectedWeb3: Web3) {
this.injectedWeb3 = injectedWeb3;
}
public handleRequest(payload: any, next: () => void, end: (err: Error, result: any) => void) {
switch (payload.method) {
case 'web3_clientVersion':
this.injectedWeb3.version.getNode(end);
return;
case 'eth_accounts':
this.injectedWeb3.eth.getAccounts(end);
return;
case 'eth_sendTransaction':
const [txParams] = payload.params;
this.injectedWeb3.eth.sendTransaction(txParams, end);
return;
case 'eth_sign':
const [address, message] = payload.params;
this.injectedWeb3.eth.sign(address, message, end);
return;
default:
next();
return;
}
}
// Required to implement this method despite not needing it for this subprovider
// tslint:disable-next-line:prefer-function-over-method
public setEngine(engine: any) {
// noop
}
}
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