fabric-sdk-node | Hyperledger Fabric SDK for Node https | Blockchain library

I am trying to build a decentralized app that able to do show the block header like data hash, the previous hash of the block when a user submits a new transaction. However, It seems like the new version of Fabric Node SDK 2.2 removes the function queryblock.

I refer on the documentation at https://hyperledger.github.io/fabric-sdk-node/release-2.2/module-fabric-network.html and currently still looking for some workaround to show the block info of the user's transaction.

The ideal output that I wish to achieved is almost similar to what Hyperledger Explorer provide.The reference can be check at:

• https://github.com/hyperledger/blockchain-explorer

which show the information such as Number of Blocks, Data Hash, Previous Hash and other Block Information regarding the hash.

1. There are some information like BlockEvent that have the name blockData in the interface BlockEvent. However, I can't seem to find it when npm install i fabric-network.

   • https://hyperledger.github.io/fabric-sdk-node/release-2.2/module-fabric-network.BlockEvent.html

2. Since the user can query and check their hash with the ledger, a key or hash need to be returned to the user upon transaction success. Is there any API function for this? So far, I able to found there are getTransactionId() in the class Transaction. But is this one that I need to use?

   • https://hyperledger.github.io/fabric-sdk-node/release-2.2/module-fabric-network.Transaction.html

All of the reference since to deal with the old version of node SDK which is version 1.4.

• Hyperledger Fabric : How to Query blocks using fabric NodeSDK
• HyperLedger Fabric Get Block Info - using node.js
• how to display current hash,previous hash using node js on view pages for hyperledger fabric
• How do you calculate the Block Hash for the Current Block in Hyperledger Fabric with javascript?
• How to get history of asset with block hash in hyperledger fabric using node sdk

I am trying to sign transaction proposals with offline key. I have generated signed certificate by Org CA and now I am trying to create User with fabric-common nodejs SDK version 2.2.5.

I'm trying to connect to an HSM using fabric-network V1.4.17 looking at the HSMWalletMixin constructor there are no options to tell the class the library label and pin.

Instead all these variables can be found in the X509WalletMixin.

Here's the code in the class:

I use hyperledger fabric V1.4.10 I created a deployer app that installs and upgrades my chaincode using the node SDK API and everything works great but I am storing all my project compressed in a zip file as an artifact and I would like to have a smaller artifact to store, off course I'm adding the node modules, the js and the ts files, as I'm not completely sure if they are needed or not during deployment.

I would like to be able to do the same that is done using "peer chaincode package" from my deployer app to be able to package my code in an efficient way.

I have seen in the SDK a BasePackager class that seems to be able to package the code, but I can´t find any examples of how to use it.

Also looking inside the js code I found that the install method can receive a ChaincodeInstallRequest that can be a ChaincodePackageInstallRequest or a ChaincodePathInstallRequest.

Here's the code inside index.d.ts:

From what I'm reading, it is only possible to pass string values from the Node SDK to the chaincode via submitTransaction.

However, from the chaincode point of view, there is no issue with creating an asset containing, say, booleans and integers and store them.

Hence my question: is storing non-string attributes considered a bad practice, and if not, what is the best way to implement it? Of course I can send strings that the smart contract will then convert back to bool/ints, but that sounds quite ugly. I also guess that instead of sending ...args I can send a JSON, but again, quite ugly.

i am building a blockchain on hyperledger fabric (node.js SDK).

https://hyperledger.github.io/fabric-sdk-node/release-1.4/global.html#BlockchainInfo__anchor

i call the api BlockchainInfo and get a json format response, which includes currentBlockHash

the offical document shows that the response data type of currentBlockHash is Array< byte >

such as the following data.

i would like to convert this buffer to string but have no idea what to do.

thanks for your reading the question.

Can anyone help me to find FabToken source code of Hyperledger Fabric? And an example of Smart contract that use it?

I've already check a lot of links, for example:

https://fabric-sdk-node.github.io/master/tutorial-fabtoken.html

https://gerrit.hyperledger.org/r/c/fabric/+/32979

but they don't works.

Thanks

FINAL UPDATE (for other users)

https://github.com/hyperledger/fabric/tree/v2.0.0-alpha/token

this is the code of FabToken

I am trying to modify fabric-sdk-node project to use it with RSA certs and keys.

And for now I have no idea on how to produce a SKI (X509v3 Subject Key Identifier) with a RSA public key.

That project is using jsrsasign package on the crypto things.

I have found in the jsrsasign issue page on Github.com which can produce SKI with ECDSA, but still no clue in the RSA ones.

Any advice will be welcomed!

Thanks!

I am trying to add a new Org to an existing Hyperledger fabric network.

The initial network is created by the byfn.sh script that stands up an Orderer and Org1 & Org2.

I have followed this example on Medium.com to create the update protobuf file. Everything that requires configtxgen, cryptogen and configtxlator is done as per this example. However, when it comes to executing the command peer channel signconfigtx -f org3_update_in_envelope.pb, I would like to do that using the Fabric Node SDK.

A point to note here is that if I execute the peer channel ... commands from the cli container command line, the channel update goes through, so I know that the file org3_update_in_envelope.pb is not corrupted.

Using this tutorial and some guidance from this question, I have the following code: