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JsonRpc.ts
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JsonRpc.ts
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import { Logger } from '@ethersproject/logger';
import { AxiosRequestConfig } from 'axios';
import HttpClient from './Http';
const logger = new Logger('JsonRpcProvider');
export default class JsonRpcProvider {
private readonly _httpClient: HttpClient;
private _nextId: number;
constructor(url?: string, username?: string, password?: string) {
const config: AxiosRequestConfig = {
baseURL: url || JsonRpcProvider.defaultUrl(),
responseType: 'text',
transformResponse: undefined, // https://github.com/axios/axios/issues/907,
validateStatus: () => true,
};
if (username || password) {
config.auth = { username, password };
}
this._nextId = 42;
this._httpClient = new HttpClient(config);
}
static defaultUrl(): string {
return 'http://localhost:8545';
}
public async send(method: string, params: Array<any>): Promise<any> {
const request = {
method: method,
params: params,
id: this._nextId++,
jsonrpc: '2.0',
};
const result = this._httpClient.nodePost('/', request).then(
(result) => {
logger.debug({
action: 'response',
request: request,
response: result,
provider: this,
});
return this.getResult(result);
},
(error) => {
logger.debug({
action: 'response',
error: error,
request: request,
provider: this,
});
throw error;
}
);
return result;
}
private getResult(payload: { error?: { code?: number; data?: any; message?: string }; result?: any }): any {
if (payload.error) {
const error: any = new Error(payload.error.message);
error.code = payload.error.code;
error.data = payload.error.data;
throw error;
}
return payload.result;
}
}