mirror of https://github.com/hyperledger/fabric-samples.git synced 2026-06-17 07:25:10 +00:00

History

Mark S. Lewis b931df3a5f Explicitly specify hash in client applications For some signing implementations, such as ed25519, a non-default hash implementation must be specified when creating the Gateway connection in client applications. Rather than relying on the default hash algorithm, it is probably good practice in general to specify an algorithm that is compatible with your signing implementation. This change explicitly specifies the hash algorithm to raise visibility of the option to select the hash algorithm. Signed-off-by: Mark S. Lewis <Mark.S.Lewis@outlook.com>		2024-10-07 12:25:40 -04:00
..
application-gateway-typescript	Explicitly specify hash in client applications	2024-10-07 12:25:40 -04:00
chaincode-go	Update Go chaincode to fabric-contract-api-go/v2	2024-06-21 15:18:12 -04:00
README.md	Remove legacy sample applications	2024-06-19 10:38:52 -04:00

README.md

Asset transfer secured agreement sample

The asset transfer events sample demonstrates how to transfer a private asset between two organizations without publicly sharing data .

About the sample

This sample includes smart contract and application code in multiple languages. This sample shows how Fabric features state based endorsement, private data, and access control to provide secured transactions.

Application

Refer Secured asset transfer in Fabric for application details .

Smart Contract

The smart contract (in folder chaincode-go) implements the following functions to support the application:

CreateAsset
ChangePublicDescription
AgreeToSell
AgreeToBuy
VerifyAssetProperties
TransferAsset
ReadAsset
GetAssetPrivateProperties
GetAssetSalesPrice
GetAssetBidPrice
GetAssetHashId
QueryAssetSaleAgreements
QueryAssetBuyAgreements
QueryAssetHistory

Running the sample

Like other samples, the Fabric test network is used to deploy and run this sample. Follow these steps in order:

Create the test network and a channel (from the test-network folder).
```
./network.sh up createChannel -c mychannel -ca
```

Deploy the smart contract implementations.

# To deploy the go chaincode implementation
./network.sh deployCC -ccn secured -ccp ../asset-transfer-secured-agreement/chaincode-go/ -ccl go -ccep "OR('Org1MSP.peer','Org2MSP.peer')"

Run the application (from the asset-transfer-secured-agreement folder).

# To run the Typescript sample application
cd application-gateway-typescript
npm install
npm start

Clean up

When you are finished, you can bring down the test network (from the test-network folder). The command will remove all the nodes of the test network, and delete any ledger data that you created.

./network.sh down