Summary: An external app can submit a transaction that writes to a single implicit private collection but fails when writing to 2 implicit collections. Everything works OK when using the vscode blockchain extension instead of the external app.
Details: I am using the vscode blockchain extension (v2.0.8) When used, it installs microfab version 0.0.11. I am using a 2-org network created in the vscode extension using the 2-org template. I have a Smart Contract that writes data to 2 implicit private collections (for Org1 and Org2).
Here is the relevant portion of the smart contract (typescript):
@Transaction()
public async createMyPrivateAsset(ctx: Context, myPrivateAssetId: string): Promise<void> {
const exists: boolean = await this.myPrivateAssetExists(ctx, myPrivateAssetId);
if (exists) {
throw new Error(`The asset my private asset ${myPrivateAssetId} already exists`);
}
const privateAsset: MyPrivateAsset = new MyPrivateAsset();
const transientData: Map<string, Uint8Array> = ctx.stub.getTransient();
if (transientData.size === 0 || !transientData.has('privateValue')) {
throw new Error('The privateValue key was not specified in transient data. Please try again.');
}
privateAsset.privateValue = transientData.get('privateValue').toString();
const collectionName: string = await getCollectionName(ctx, ctx.clientIdentity.getMSPID());
await ctx.stub.putPrivateData(collectionName, myPrivateAssetId, Buffer.from(JSON.stringify(privateAsset)));
}
@Transaction()
public async createMyPrivateAssetMultiple(ctx: Context, myPrivateAssetId: string): Promise<void> {
const exists: boolean = await this.myPrivateAssetExists(ctx, myPrivateAssetId);
if (exists) {
throw new Error(`The asset my private asset ${myPrivateAssetId} already exists`);
}
const privateAsset: MyPrivateAsset = new MyPrivateAsset();
const transientData: Map<string, Uint8Array> = ctx.stub.getTransient();
if (transientData.size === 0 || !transientData.has('privateValue')) {
throw new Error('The privateValue key was not specified in transient data. Please try again.');
}
privateAsset.privateValue = transientData.get('privateValue').toString();
for (const mspid of ['Org1MSP', 'Org2MSP']) {
var collectionName: string = await getCollectionName(ctx, mspid);
await ctx.stub.putPrivateData(collectionName, myPrivateAssetId, Buffer.from(JSON.stringify(privateAsset)));
}
}
@Transaction(false)
@Returns('MyPrivateAsset')
public async readMyPrivateAsset(ctx: Context, myPrivateAssetId: string): Promise<string> {
const exists: boolean = await this.myPrivateAssetExists(ctx, myPrivateAssetId);
if (!exists) {
throw new Error(`The asset my private asset ${myPrivateAssetId} does not exist`);
}
let privateDataString: string;
const collectionName: string = await getCollectionName(ctx, ctx.clientIdentity.getMSPID());
const privateData: Uint8Array = await ctx.stub.getPrivateData(collectionName, myPrivateAssetId);
privateDataString = JSON.parse(privateData.toString());
return privateDataString;
}
createMyPrivateAsset writes to a single implicit collection: everything OK.
createMyPrivateAssetMultiple writes to 2 implicit collections: fails in external app.
Both transactions work perfectly when I use the vscode Transaction View to submit transactions.
For createMyPrivateAssetMultiple, I submit using the Org1 gateway and then call readMyPrivateAsset using the Org1 gateway and also using the Org2 gateway and the private data is returned correctly.
Now, when I use an external app, the transaction createMyPrivateAsset works but createMyPrivateAssetMultiple does not.
Here is the relevant portion of the app (typescript):
// connection
const gateway: Gateway = new Gateway();
const connectionProfilePath: string = path.resolve(__dirname, '..', connectionFile);
const connectionProfile = JSON.parse(fs.readFileSync(connectionProfilePath, 'utf8'));
const connectionOptions: GatewayOptions = { wallet, identity: identity, discovery: { enabled: true, asLocalhost: true } };
await gateway.connect(connectionProfile, connectionOptions);
// Get the network (channel) our contract is deployed to.
const network = await gateway.getNetwork('mychannel');
// Get the contract from the network.
const contract = network.getContract('private-contract');
Here is the transaction submission for createMyPrivateAsset
let transientData = {
'privateValue': Buffer.from(`Private value for asset ${assetId}`)
};
const trans:Transaction = contract.createTransaction('createMyPrivateAsset');
const buffer: Buffer = await trans.setTransient(transientData).submit(assetId);
This works fine in the app. Here is the code for createMyPrivateAssetMultiple
let transientData = {
'privateValue': Buffer.from(`Private value for asset ${assetId}`)
};
const trans:Transaction = contract.createTransaction('createMyPrivateAssetMultiple');
const buffer: Buffer = await trans.setTransient(transientData).submit(assetId);
For this transaction, the app throws this (using Org1 gateway):
2022-06-07T13:21:50.727Z - warn: [TransactionEventHandler]: strategyFail: commit failure for transaction "4e9921b590a361ae01bba673e1d3d204d106522780c820055cec0345e1e67e6f": TransactionError: Commit of transaction 4e9921b590a361ae01bba673e1d3d204d106522780c820055cec0345e1e67e6f failed on peer org1peer-api.127-0-0-1.nip.io:8084 with status ENDORSEMENT_POLICY_FAILURE
The microfab docker container log includes this:
> WARN 0ff Failed fetching private data from remote peers for dig2src:[map[{b16526e4cd2ac3f431103cda23a6f64adc12acab0550eff18c1f25f1cc0d8bc1 private-contract _implicit_org_Org2MSP 6 0}:[]]], err: Empty membership channel=mychannel
...
[ org2peer] 2022-06-07 13:22:50.794 UTC [gossip.privdata] RetrievePvtdata -> WARN 220 Could not fetch all 1 eligible collection private write sets for block [20] (0 from local cache, 0 from transient store, 0 from other peers). Will commit block with missing private write sets:[txID: 4e9921b590a361ae01bba673e1d3d204d106522780c820055cec0345e1e67e6f, seq: 0, namespace: private-contract, collection: _implicit_org_Org2MSP, hash: 3e0f263d2edcfaf29df346504a40fdbadce0807938f204fe3e6bf753b751d9a3
Also, package.json includes this:
"dependencies": {
"fabric-network": "~2.1.0"
},
Can anyone shed light on this problem?
