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. 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>
```