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Asset Exchange: Fabric with Corda

We will demonstrate asset exchange of a bond in Fabric network1 with tokens on Corda_Network. For Fabric commands, run from samples/fabric/fabric-cli folder, and for Corda commands, run from samples/corda/corda-simple-application folder, in your clone of the Weaver repository. Here Alice and Bob in Fabric network1 correspond to PartyA (CORDA_PORT=10006) and PartyB (CORDA_PORT=10009) in Corda_Network respectively. Following are the step-by-step asset exchange process:

Notes
The hash used in following steps can be replaced by any valid SHA256 hash.
  • Run the following to verify the status of the bond assets owned by alice and bob in the Fabric network network1 from samples/fabric/fabric-cli folder:
    ./scripts/getAssetStatus.sh
  • Run the following to verify the status of the assets owned by PartyA and PartyB in the Corda_Network from samples/corda/corda-simple-application folder:
    ./scripts/getAssetStatus.sh
  • Generate Secret-Hash Pair using following command (prints hash in base64):
    ./bin/fabric-cli hash --hash_fn=SHA256 secrettext
  • Run the following to trigger alice locking bond01:a03 for bob in network1 for 60 mins:
    ./bin/fabric-cli asset exchange lock --timeout-duration=3600 --locker=alice --recipient=bob --hashBase64=ivHErp1x4bJDKuRo6L5bApO/DdoyD/dG0mAZrzLZEIs= --target-network=network1 --param=bond01:a03
  • Run the following to verify alice's lock:
    ./bin/fabric-cli asset exchange is-locked --locker=alice --recipient=bob --target-network=network1 --param=bond01:a03
  • Run the following to trigger PartyB locking 50 units of token type t1 for PartyA in Corda_Network for 30 mins:
    CORDA_PORT=10009 ./clients/build/install/clients/bin/clients lock-asset --fungible --hashBase64=ivHErp1x4bJDKuRo6L5bApO/DdoyD/dG0mAZrzLZEIs= --timeout=1800 --recipient="O=PartyA,L=London,C=GB" --param=t1:50
    Note the contract-id displayed after successful execution of the command, will be used in next steps. The output containing contract-id would like this:
    HTLC Lock State created with contract ID Right(b=10448674_80d2bee7-5a5d-45df-b14e-60bac4ba1bf3).
    contract-id is the alphanumeric text (with underscore and hyphens) after b= within parenthesis.
  • Run the following to verify PartyB's lock (can be verified by both parties):
    CORDA_PORT=10006 ./clients/build/install/clients/bin/clients is-asset-locked --contract-id=<contract-id>
  • Run the following to trigger PartyA's claim for 50 units of token type t1 locked by PartyB in Corda_Network:
    CORDA_PORT=10006 ./clients/build/install/clients/bin/clients claim-asset --secret=secrettext --contract-id=<contract-id>
    PartyB can see its node's logs to get the revealed hash preimage, and use it to claim the bond in the Fabric network.
  • Run the following to trigger bob's claim for bond01:a03 locked by alice in network1:
    ./bin/fabric-cli asset exchange claim --recipient=bob --locker=alice --target-network=network1 --param=bond01:a03 --secret=secrettext
  • Run the following to verify the status of the bond assets owned by alice and bob in the Fabric network network1 from samples/fabric/fabric-cli folder:
    ./scripts/getAssetStatus.sh
  • Run the following to verify the status of the assets owned by PartyA and PartyB in the Corda_Network from samples/corda/corda-simple-application folder:
    ./scripts/getAssetStatus.sh

The above steps complete a successful asset exchange between Fabric and Corda networks. In addition to the above commands, following commands can be run if specified timeout has expired and the locked asset remains unclaimed.

  • If alice wants to unlock the bond asset, run the following to trigger alice's re-claim for bond01:a03 locked in network1:
    ./bin/fabric-cli asset exchange unlock --locker=alice --recipient=bob --target-network=network1 --param=bond01:a03
  • If PartyB wants to unlock the token asset, run the following to trigger unlock for t1:50 locked in Corda_Network:
    CORDA_PORT=10009 ./clients/build/install/clients/bin/clients unlock-asset --contract-id=<contract-id>