fabric-shim-api

import { ChaincodeInterface, Stub, SuccessResponse, ErrorResponse, ChaincodeResponse } from 'fabric-shim-api'; class MyChaincode implements ChaincodeInterface { async Init(stub: Stub): Promise<ChaincodeResponse> { console.info('=========== Instantiated MyChaincode ==========='); return SuccessResponse.newSuccess('Chaincode initialized successfully.'); } async Invoke(stub: Stub): Promise<ChaincodeResponse> { console.info('=========== Invoked MyChaincode ==========='); const ret = stub.getFunctionAndParameters(); const method = this[ret.fcn as keyof MyChaincode]; if (!method) { console.error(`No method found for function: ${ret.fcn}`); return ErrorResponse.newError(`Unknown function: ${ret.fcn}`); } try { const payload = await method.apply(this, [stub, ret.params]); return SuccessResponse.newSuccess(payload); } catch (err: any) { console.error(`Error calling function ${ret.fcn}: ${err.message}`); return ErrorResponse.newError(err.message); } } private async createAsset(stub: Stub, args: string[]): Promise<Buffer> { if (args.length !== 2) { throw new Error('Incorrect number of arguments. Expecting 2 (assetName, assetValue).'); } const [assetName, assetValue] = args; await stub.putState(assetName, Buffer.from(assetValue)); return Buffer.from(`Asset ${assetName} created with value ${assetValue}`); } } // For demonstration, typically registered with chaincode-api or shim directly // For a real chaincode, you'd usually pass this to start() from 'fabric-shim' // For example: chaincode.start(new MyChaincode()); export { MyChaincode };