Can Hyperledger Fabric Chaincodes Identify Their Callers?

Identifying the Caller Chaincode in Hyperledger Fabric Using InvokeChaincode

Consider the following network architecture:

A -> Chaincode1 -> fabcar

• A is the application
• Chaincode1 is a Go chaincode
• fabcar is a Node.js chaincode

These components operate on the "mychannel" channel.

When invoking fabcar from Chaincode1 using APIstub.InvokeChaincode, fabcar does not inherently have the ability to determine the caller chaincode's ID. The getCreator() method in fabcar only provides the caller organization's details.

Alternative Approach using SignedProposal

Attempts to retrieve the caller chaincode ID using getSignedProposal() have also been unsuccessful. While this method returns a signed transaction proposal, it is challenging to extract the specific information needed.

Conclusion

As of now, there is no way for fabcar to obtain the caller chaincode's ID within the provided network architecture. This is because chaincodes lack a unique identity in the current Hyperledger Fabric architecture.

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