Can Chaincodes Retrieve the Identity of Their Caller?

Retrieving Chaincode Caller ID: Exploration and Limitations

In a typical Hyperledger Fabric network, chaincodes interact through the InvokeChaincode() function in the Node SDK. One might question whether the called chaincode (fabcar in our example) can retrieve the identity of the caller chaincode (Chaincode1).

Unfortunately, the answer is currently negative. This limitation stems from the fact that chaincodes lack a distinct identity within the Fabric environment. While the getCreator() method provides information about the caller organization, it falls short of identifying the specific chaincode that initiated the invocation.

Attempts to leverage the getSignedProposal() method, as per the Fabric documentation, prove equally futile. The resulting object offers insight into the proposal's signature and payload, but it provides no straightforward means of extracting the caller chaincode's ID.

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