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History

Dave Enyeart f32f77b129 Update secured asset transfer sample (#781 ) A recent commit added the potential buyer to an asset's state based endorsement policy. That change was problematic because if the transfer fell through, the buyer lost control of the asset, in that they could no longer update the asset or change the sell price or sell to somebody else. The asset state based endorsement policy is now based on the seller only, and we document that additional parties could be added such as a trusted third party (although no such party exists in test network at this time). This commit also re-adds some necessary verifications, and make other minor edits and comments to help users understand the sample. Signed-off-by: David Enyeart <enyeart@us.ibm.com>		2022-07-13 14:09:14 -04:00
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application-gateway-typescript	Update secured asset transfer sample (#781 )	2022-07-13 14:09:14 -04:00
application-javascript	Update secured asset transfer sample (#781 )	2022-07-13 14:09:14 -04:00
chaincode-go	Update secured asset transfer sample (#781 )	2022-07-13 14:09:14 -04:00
README.md	updated and improved asset-transfer-secured-agreement sample (#751 )	2022-05-26 13:42:01 +01:00

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

# To run the Javascript sample application
cd application-javascript
node app.js

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