application.js

/*
 * SPDX-License-Identifier: Apache-2.0
 */

'use strict';

const { FileSystemWallet, Gateway } = require('fabric-network');
const fs = require('fs');
const path = require('path');

const ccpPath = path.resolve(__dirname, 'connection.json');
const ccpJSON = fs.readFileSync(ccpPath, 'utf8');
const ccp = JSON.parse(ccpJSON);

async function main() {
    try {

        // Create a new file system based wallet for managing identities.
        const walletPath = path.join(process.cwd(), '_idwallet');
        const wallet = new FileSystemWallet(walletPath);
        console.log(`Wallet path: ${walletPath}`);

        // Check to see if we've already enrolled the user.
        const userExists = await wallet.exists('user1');
        if (!userExists) {
            console.log('An identity for the user "user1" does not exist in the wallet');
            console.log('Run the registerUser.js application before retrying');
            return;
        }

        // Create a new gateway for connecting to our peer node.
        const gateway = new Gateway();
        await gateway.connect(ccp, { wallet, identity: 'user1', discovery: { enabled: false } });

        // Get the network (channel) our contract is deployed to.
        const network = await gateway.getNetwork('mychannel');

        // Get the contract from the network.
        const contract = network.getContract('decentralizedenergy');

        // Submit the specified transaction.
        // createCar transaction - requires 5 argument, ex: ('createCar', 'CAR12', 'Honda', 'Accord', 'Black', 'Tom')
        // changeCarOwner transaction - requires 2 args , ex: ('changeCarOwner', 'CAR10', 'Dave')
        //await contract.submitTransaction('createCar', 'CAR12', 'Honda', 'Accord', 'Black', 'Tom');
        //console.log('Transaction has been submitted');

        console.log('\nSubmit AddResident transaction.');
        let residentId = 'R1';
        let firstName = 'Carlos';
        let lastName = 'Roca';
        let coinsBalance = '1000';
        let energyValue = '100';
        let energyUnits = 'kwh';
        let cashBalance = '100';
        let cashCurrency = 'USD';

        const addResidentResponse = await contract.submitTransaction('AddResident', residentId, firstName, lastName, coinsBalance, energyValue, energyUnits, cashBalance, cashCurrency);
        console.log('addResidentResponse: ');
        console.log(addResidentResponse.toString('utf8'));
        console.log('addResidentResponse_JSON.parse: ');
        console.log(JSON.parse(addResidentResponse.toString()));

        console.log('\nSubmit AddBank transaction.');
        let bankId = 'B1';
        let name = 'UNITED';
        coinsBalance = '10000';
        cashBalance = '1000';
        cashCurrency = 'USD';

        const addBankResponse = await contract.submitTransaction('AddBank', bankId, name, coinsBalance, cashBalance, cashCurrency);
        console.log('addBankResponse: ');
        console.log(addBankResponse.toString('utf8'));
        console.log('addBankResponse_JSON.parse: ');
        console.log(JSON.parse(addBankResponse.toString()));


        console.log('\nSubmit AddUtilityCompany transaction.');
        let utilityCompanyId = 'U1';
        name = 'United';
        coinsBalance = '10000';
        energyValue = '100';
        energyUnits = 'kwh';

        const addUtilityCompanyResponse = await contract.submitTransaction('AddUtilityCompany', utilityCompanyId, name, coinsBalance, energyValue, energyUnits);
        console.log('addUtilityCompanyResponse: ');
        console.log(addUtilityCompanyResponse.toString('utf8'));
        console.log('addUtilityCompanyResponse_JSON.parse: ');
        console.log(JSON.parse(addUtilityCompanyResponse.toString()));

        console.log('\nGet residentId state: ' + residentId);
        const residentIdResponse = await contract.submitTransaction('GetState', residentId);
        console.log('residentIdResponse: ');
        console.log(residentIdResponse.toString('utf8'));
        console.log('residentIdResponse_JSON.parse_response: ');
        console.log(JSON.parse(residentIdResponse.toString()));


        console.log('\nSubmit EnergyTrade transaction.');
        let energyRate = '1';
        energyValue = '10';
        let energyReceiverId = utilityCompanyId;
        let energySenderId = residentId;

        const energyTradeResponse = await contract.submitTransaction('EnergyTrade', energyRate, energyValue, energyReceiverId, energySenderId);
        console.log('energyTradeResponse: ');
        console.log(energyTradeResponse.toString('utf8'));
        console.log('energyTradeResponse_JSON.parse: ');
        console.log(JSON.parse(energyTradeResponse.toString()));

        console.log('\nGet residentId state.');
        const residentIdResponse2 = await contract.submitTransaction('GetState', residentId);
        console.log('residentIdResponse2: ');
        console.log(residentIdResponse2.toString('utf8'));
        console.log('residentIdResponse2_JSON.parse_response: ');
        console.log(JSON.parse(residentIdResponse2.toString()));

        console.log('\nGet residents');
        const responseResidents = await contract.submitTransaction('GetState', 'residents');
        console.log('responseResidents: ');
        console.log(responseResidents.toString('utf8'));
        console.log('responseResidents_JSON.parse_response: ');
        console.log(JSON.parse(responseResidents.toString()));


        // Disconnect from the gateway.
        await gateway.disconnect();

    } catch (error) {
        console.error(`Failed to submit transaction: ${error}`);
        process.exit(1);
    }
}

main();