Explorer does not work with Hyperledger Fabric v3.0.0 and FabricGateway.ts file should be corrected/updated

[umitkilic]

What happened?

There is a problem about using Hyperledger Fabric v3.0.0 with Explorer. It does not show chaincodes and transactions. It looks like https://github.com/hyperledger-labs/blockchain-explorer/blob/main/app/platform/fabric/gateway/FabricGateway.ts file should be updated to be compatible with HLFv3.0.0. When I check the logs on the explorer container with docker logs CONTAINER command, it shows the error:

[2024-11-21T12:02:03.592] [ERROR] Sync - <<<<<<<<<<<<<<<<<<<<<<<<<< Synchronizer Error >>>>>>>>>>>>>>>>>>>>>

[2024-11-21T12:02:03.592] [ERROR] Sync - Error: error in simulation: failed to execute transaction d00a5575f86467db94ce1ba5e0dec11f0e837fd23b41c0ccc526128ee7c0a93e: could not launch chaincode lscc.syscc: error building chaincode: error building image: failed to get chaincode package for external build: could not get legacy chaincode package 'lscc.syscc': open /var/hyperledger/production/chaincodes/lscc.syscc: no such file or directory

The start point of the error is, I think, async queryInstantiatedChaincodes(channelName) function. There is a problem with the lifecycle of chaincode.

What did you expect to happen?

---

How can we reproduce it (as minimally and precisely as possible)?

async queryInstantiatedChaincodes(channelName) function in FabricGateway.ts file should be updated.

Anything else we need to know?

No response

OS version

# On Linux:
$ cat /etc/os-release
PRETTY_NAME="Ubuntu 22.04.5 LTS"

NAME="Ubuntu"

VERSION_ID="22.04"

VERSION="22.04.5 LTS (Jammy Jellyfish)"

VERSION_CODENAME=jammy

ID=ubuntu

ID_LIKE=debian

HOME_URL="https://www.ubuntu.com/"

SUPPORT_URL="https://help.ubuntu.com/"

BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"

PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"

UBUNTU_CODENAME=jammy
$ uname -a
Linux umit 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

# On Windows:
C:\> wmic os get Caption, Version, BuildNumber, OSArchitecture
# paste output here

[agiratech-praveenm]

I too get similar error. Was running fine until recently. But now I am getting this error in explorer pod:

[2024-12-12T02:40:07.235] [INFO] FabricGateway - queryInstantiatedChaincodes primary-channel
[2024-12-12T02:40:07.243] [ERROR] Sync - <<<<<<<<<<<<<<<<<<<<<<<<<< Synchronizer Error >>>>>>>>>>>>>>>>>>>>>
[2024-12-12T02:40:07.243] [ERROR] Sync - Error: error in simulation: failed to execute transaction 892bd945724067f24c99d19cb47985a3d471106a3825807c6aae3877f7edba14: could not launch chaincode lscc.syscc: error building chaincode: error building image: failed to get chaincode package for external build: could not get legacy chaincode package 'lscc.syscc': open /var/hyperledger/production/chaincodes/lscc.syscc: no such file or directory
    at SingleQueryHandler.evaluate (/opt/explorer/node_modules/fabric-network/lib/impl/query/singlequeryhandler.js:60:57)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async Transaction.evaluate (/opt/explorer/node_modules/fabric-network/lib/transaction.js:319:25) {
  isEndorsed: false,
  payload: { type: 'Buffer', data: [] },
  status: 500
}
[2024-12-12T02:40:07.243] [INFO] Sync - <<<<<<<<<<<<<<<<<<<<<<<<<< Closing client processor >>>>>>>>>>>>>>>>>>>>>

[agiratech-praveenm]

I had to downgrade the peer and orderers from v2.5.10 to v.2.5.9 for the explorer to work. Once peers and orderers were downgraded I just restarted the explorer and it worked.

[johannww]

Explorer should probably use the new fabric-gateway to communicate with v3.0.0 networks, I think.

EDIT: Apparently, it works if you use chaincode as a service: https://github.com/hyperledger-labs/blockchain-explorer/issues/508#issuecomment-2453028005