mirror of
https://github.com/hyperledger/fabric-samples.git
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100 lines
No EOL
4 KiB
JavaScript
100 lines
No EOL
4 KiB
JavaScript
/*
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SPDX-License-Identifier: Apache-2.0
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*/
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/*
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* This application has 6 basic steps:
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* 1. Select an identity from a wallet
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* 2. Connect to network gateway
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* 3. Access PaperNet network
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* 4. Construct request to query a commercial paper
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* 5. Submit transaction
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* 6. Process response
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*/
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'use strict';
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// Bring key classes into scope, most importantly Fabric SDK network class
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const fs = require('fs');
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const yaml = require('js-yaml');
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const { FileSystemWallet, Gateway } = require('fabric-network');
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const CommercialPaper = require('../contract/lib/paper.js');
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// A wallet stores a collection of identities for use
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const wallet = new FileSystemWallet('../identity/user/balaji/wallet');
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// Main program function
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async function main() {
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// A gateway defines the peers used to access Fabric networks
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const gateway = new Gateway();
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// Main try/catch block
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try {
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// Specify userName for network access
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// const userName = 'isabella.issuer@magnetocorp.com';
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const userName = 'Admin@org1.example.com';
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// Load connection profile; will be used to locate a gateway
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let connectionProfile = yaml.safeLoad(fs.readFileSync('../gateway/networkConnection.yaml', 'utf8'));
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// Set connection options; identity and wallet
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let connectionOptions = {
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identity: userName,
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wallet: wallet,
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discovery: { enabled:false, asLocalhost: true }
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};
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// Connect to gateway using application specified parameters
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console.log('Connect to Fabric gateway.');
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await gateway.connect(connectionProfile, connectionOptions);
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// Access PaperNet network
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console.log('Use network channel: mychannel.');
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const network = await gateway.getNetwork('mychannel');
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// Get addressability to commercial paper contract
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console.log('Use org.papernet.commercialpaper smart contract.');
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const contract = await network.getContract('papercontract', 'org.papernet.commercialpaper');
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// get commercial paper
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console.log('Submit commercial paper getPaper transaction.');
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const getPaperResponse = await contract.evaluateTransaction('getPaper', 'MagnetoCorp', '00001');
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// process response
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console.log('Process getPaper transaction response.');
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let paperJSON = JSON.parse(getPaperResponse);
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let paper = CommercialPaper.createInstance(paperJSON.issuer, paperJSON.paperNumber, paperJSON.issueDateTime, paperJSON.maturityDateTime, paperJSON.faceValue);
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paper.setOwner(paperJSON.owner);
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paper.currentState = paperJSON.currentState;
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// let paper = CommercialPaper.fromBuffer(getPaperResponse);
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let paperState = 'Unknown';
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if(paper.isIssued()) {
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paperState = 'ISSUED';
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} else if(paper.isTrading()){
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paperState = 'TRADING';
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} else if(paper.isRedeemed()){
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paperState = 'REDEEMED';
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}
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console.log(` +--------- Paper Retrieved ---------+ `);
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console.log(` | Paper number: "${paper.paperNumber}"`);
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console.log(` | Paper is owned by: "${paper.owner}"`);
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console.log(` | Paper is currently: "${paperState}"`);
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console.log(` | Paper face value: "${paper.faceValue}"`);
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console.log(` | Paper is issued by: "${paper.issuer}"`);
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console.log(` | Paper issue on: "${paper.issueDateTime}"`);
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console.log(` | Paper matures on: "${paper.maturityDateTime}"`);
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console.log(` +-----------------------------------+ `);
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console.log('Transaction complete.');
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//console.log('Transaction complete.' + JSON.stringify(paper));
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} catch (error) {
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console.log(`Error processing transaction. ${error}`);
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console.log(error.stack);
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} finally {
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// Disconnect from the gateway
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console.log('Disconnect from Fabric gateway.')
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gateway.disconnect();
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}
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}
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main().then(() => {
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console.log('getPaper program complete.');
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}).catch((e) => {
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console.log('getPaper program exception.');
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console.log(e);
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console.log(e.stack);
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process.exit(-1); |