fabric-shim
Advanced tools
A node.js implementation of Hyperledger Fabric chaincode shim, to allow endorsing peers and user-provided chaincodes to communicate with each other
The fabric-shim provides the chaincode interface, a lower level API for implementing "Smart Contracts". To confirm that this is the same as the fabric-shim in previous versions of Hyperledger Fabric.
Detailed explanation on the concept and programming model can be found here: https://hyperledger-fabric.readthedocs.io/en/latest/smartcontract/smartcontract.html.
npm install --save fabric-shim
The chaincode interface contains two methods to be implemented:
const shim = require('fabric-shim');
const Chaincode = class {
async Init(stub) {
// use the instantiate input arguments to decide initial chaincode state values
// save the initial states
await stub.putState(key, Buffer.from(aStringValue));
return shim.success(Buffer.from('Initialized Successfully!'));
}
async Invoke(stub) {
// use the invoke input arguments to decide intended changes
// retrieve existing chaincode states
let oldValue = await stub.getState(key);
// calculate new state values and saves them
let newValue = oldValue + delta;
await stub.putState(key, Buffer.from(newValue));
return shim.success(Buffer.from(newValue.toString()));
}
};
Start the chaincode process and listen for incoming endorsement requests:
shim.start(new Chaincode());
Visit API Reference and click on "Classes" link in the navigation bar on the top to view the list of class APIs.
Tested with node.js 8.9.0 (LTS).
This package is distributed under the Apache License, Version 2.0, see LICENSE.txt for more information.
v2.4.0-beta
Wed 18 Aug 2021 12:11:16 BST
FAQs
A node.js implementation of Hyperledger Fabric chaincode shim, to allow endorsing peers and user-provided chaincodes to communicate with each other
The npm package fabric-shim receives a total of 14,479 weekly downloads. As such, fabric-shim popularity was classified as popular.
We found that fabric-shim demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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