The kalp-sdk-node provides the Kalpcontract interface a high level API for application developers to implement Smart Contracts. Working with this API provides a high level entry point to writing business logic.

Within Hyperledger Fabric, Smart Contracts can also be referred to as Chaincode. To be more specific, the term chaincode is preferred to be used to refer to the overall container that is hosting the contracts.

The kalp-shim provides the chaincode interface, a lower level API for implementing "Smart Contracts". It also currently provides the implementation to support communication with Hyperledger Fabric peers for Smart Contracts written using the kalp-sdk-node. To confirm that this is the same as the kalp-shim in previous versions of Hyperledger Fabric.

Contract Interface

Installation

Add below mentioned packages in dependency section

"dependencies": { "kalp-sdk-node": "git@github.com:p2eengineering/kalp-sdk-node.git", "kalp-shim-sdk-new": "git@github.com:kamalp2e/kalp-shim-sdk-new.git" },```

Usage

Implement a class that ends the contract class, a constructor is needed. The other functions will be invokable functions of your Smart Contract

// updatevalues.js
'use strict';

// SDK Library to asset with writing the logic
const { Contract } = require('fabric-contract-api');

// Business logic (well just util but still it's general purpose logic)
'use strict';

const { Kalpcontract, Kalpsdk } = require('kalp-sdk-node');
// const { Kalpsdk } = require('./klap ');

class FabCar extends Kalpcontract {

	/*** Constructor is used to intialize smart contract 
	@name //name of the smart contact
	@isPaybleContract //true -> to capture payment details in ledger with transaction details
	*/

    constructor() {
        console.info('============= START : FabCar constructor ===========');
    
		super('Myfabcar', true);
      }

	//smaple function using putStateWithoutKYC function of kalp-sdk-node
	async createCar(ctx, carData) {
		console.info('============= START : Create Car ===========');

		let input = JSON.parse(carData)
		console.info('input',input);


		let carNumber  = input.CarNumber
		console.info('carNumber',carNumber);

		await ctx.putStateWithoutKYC(carNumber, Buffer.from(JSON.stringify(input)));
		console.info('============= END : Create Car ===========');
	}

	//smaple function using putStateWithKYC function of kalp-sdk-node
	async createCarwithGasFee(ctx, carData) {
		console.info('============= START : Create Car ===========');

		let input = JSON.parse(carData)
		console.info('input',input);


		let carNumber  = input.CarNumber
		console.info('carNumber',carNumber);

		await ctx.putStateWithKYC(carNumber, Buffer.from(JSON.stringify(input)));
		console.info('============= END : Create Car ===========');
	}
};