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import { JSONRPCRequestPayload } from '@0xproject/types';
import { Callback, ErrorCallback } from '../types';
import { Subprovider } from './subprovider';
/**
* This class implements the [web3-provider-engine](https://github.com/MetaMask/provider-engine) subprovider interface.
* It intercepts the `eth_accounts` JSON RPC requests and never returns any addresses when queried.
*/
export class EmptyWalletSubprovider extends Subprovider {
/**
* This method conforms to the web3-provider-engine interface.
* It is called internally by the ProviderEngine when it is this subproviders
* turn to handle a JSON RPC request.
* @param payload JSON RPC payload
* @param next Callback to call if this subprovider decides not to handle the request
* @param end Callback to call if subprovider handled the request and wants to pass back the request.
*/
// tslint:disable-next-line:prefer-function-over-method
public handleRequest(payload: JSONRPCRequestPayload, next: Callback, end: ErrorCallback) {
switch (payload.method) {
case 'eth_accounts':
end(null, []);
return;
default:
next();
return;
}
}
}
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