The Fabric Gateway client API allows applications to interact with a Hyperledger Fabric blockchain network. It implements the Fabric programming model, providing a simple API to submit transactions to a ledger or query the contents of a ledger with minimal code.

Samples showing how to create a client application that updates and queries the ledger, and listens for events, are available in the fabric-samples repository:

• fabric-samples/asset-transfer-basic
• fabric-samples/asset-transfer-events

The Gateway client API documentation for Node is available here:

• https://hyperledger.github.io/fabric-gateway/main/api/node/

Add a dependency to your project's package.json file with the command:

npm install @hyperledger/fabric-gateway

This API requires Fabric 2.4 with a Gateway enabled Peer. Additional compatibility information is available in the documentation:

• https://hyperledger.github.io/fabric-gateway/