fabric-network
Version:
SDK for writing node.js applications to interact with Hyperledger Fabric. This package encapsulates the APIs to connect to a Fabric network, submit transactions and perform queries against the ledger.
88 lines • 3.79 kB
JavaScript
;
/*
* Copyright 2020 IBM All Rights Reserved.
*
* SPDX-License-Identifier: Apache-2.0
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.QueryImpl = void 0;
const Logger = require("../../logger");
const logger = Logger.getLogger('Query');
/**
* @private
*/
class QueryImpl {
/**
* Builds a Query instance to send and then work with the results returned
* by the fabric-common/Query.
* @param {module:fabric-common.Query} query - The query instance of the proposal
* @returns {Object} options - options to be used when sending the request to
* fabric-common service endpoint {Endorser} peer.
*/
constructor(query, options = {}) {
this.query = query;
this.requestTimeout = 3000; // default 3 seconds
if (options.timeout && Number.isInteger(options.timeout)) {
this.requestTimeout = options.timeout * 1000; // need ms;
}
}
/**
* Sends a signed proposal to the specified peers. The peer endorsment
* responses are
* @param {Endorser[]} peers - The peers to query
* @returns {Object.<String, (QueryResponse | Error)>} Object with peer name keys and associated values that are either
* QueryResponse objects or Error objects.
*/
async evaluate(peers) {
const method = 'evaluate';
logger.debug('%s - start', method);
const results = {};
try {
const responses = await this.query.send({ targets: peers, requestTimeout: this.requestTimeout });
if (responses) {
if (responses.errors) {
for (const resultError of responses.errors) {
results[resultError.connection.name] = resultError;
logger.debug('%s - problem with query to peer %s error:%s', method, resultError.connection.name, resultError);
}
}
if (responses.responses) {
for (const peerResponse of responses.responses) {
if (peerResponse.response) {
const response = {
status: peerResponse.response.status,
payload: peerResponse.response.payload,
message: peerResponse.response.message,
isEndorsed: peerResponse.endorsement ? true : false
};
results[peerResponse.connection.name] = response;
logger.debug('%s - have results - peer: %s with status:%s', method, peerResponse.connection.name, response.status);
}
}
}
// check to be sure we got results for each peer requested
for (const peer of peers) {
if (!results[peer.name]) {
logger.error('%s - no results for peer: %s', method, peer.name);
results[peer.name] = new Error('Missing response from peer');
}
}
}
else {
throw Error('No responses returned for query');
}
}
catch (error) {
// if we get an error, return this error for each peer
for (const peer of peers) {
// eslint-disable-next-line @typescript-eslint/no-unsafe-assignment
results[peer.name] = error;
logger.error('%s - problem with query to peer %s error:%s', method, peer.name, error);
}
}
logger.debug('%s - end', method);
return results;
}
}
exports.QueryImpl = QueryImpl;
//# sourceMappingURL=query.js.map