how can I make a merkle proof in fabric

@ivhu, Hello; let us see if we can help you out. This forum is specifically for questions directly related to the lab exercises. Merkle tree structures are part of the channel configuration setup, see Fabric documentation here: https://hyperledger-fabric.readthedocs.io/en/latest/config_update.html?highlight=merkle. Another resource for information is the Hyperledger Discord channel; here is an invitation link: https://discord.gg/hyperledger, Let me know if this helps. Bobbi