blockchain-application-using-fabric-java-sdk | Create and Deploy a Blockchain Network | Blockchain library
kandi X-RAY | blockchain-application-using-fabric-java-sdk Summary
kandi X-RAY | blockchain-application-using-fabric-java-sdk Summary
Create and Deploy a Blockchain Network using Hyperledger Fabric SDK Java
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Top functions reviewed by kandi - BETA
- Main entry point
- Instantiate chaincode
- Create an enrollment enrollment from key and certificate
- Deploys a chaincode
- Query a transaction by id
- Initializes the instance
blockchain-application-using-fabric-java-sdk Key Features
blockchain-application-using-fabric-java-sdk Examples and Code Snippets
Community Discussions
Trending Discussions on blockchain-application-using-fabric-java-sdk
QUESTION
I'm using the fabcar project: https://github.com/IBM/blockchain-application-using-fabric-java-sdk
It uses HyperLedger 1.4.1. I would like to know a bit more about privacy-enhancing solutions.
How is Zero Knowledge Proof (ZKP) implemented? Are there any other techniques or solutions implemented?
Thank you very much.
...ANSWER
Answered 2020-Mar-23 at 14:00You can implement it using Identity Mixer as stated by IBM Hyperledger Dcoumentation.But I have not come across any working example so far neither from IBM Hypeledger site nor any other unofficial dev blogs.
https://hyperledger-fabric.readthedocs.io/en/latest/idemix.html
QUESTION
I'm using the fabcar project (https://github.com/IBM/blockchain-application-using-fabric-java-sdk)
I added "Price" as a new argument for the car structure.
I would like to obtain the average price of cars in my blockchain network.
Is there any go function to do so?
...ANSWER
Answered 2020-Feb-11 at 14:54You can use GetHistoryForKey() to retrieve all the cars and next calculate the average price ciclying on them.
Supposing you want to know the maximum price you can do:
QUESTION
I'm using the fabcar project: https://github.com/IBM/blockchain-application-using-fabric-java-sdk
I would like to know if there is a way to get the transaction history with a certain key (Not just querying a simple car o listing all of them.
Thank you.
...ANSWER
Answered 2020-Feb-03 at 10:40Yes, you have an API called GetHistoryForKey()
You can read more here : How to fetch asset modification history in hyperledger fabric
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install blockchain-application-using-fabric-java-sdk
The previous step creates all required docker images with the appropriate configuration. To work with the deployed network using Hyperledger Fabric SDK java 1.4.1, perform the following steps.
The java client sources are present in the folder java of the repo.
Check your environment before executing the next step. Make sure, you are able to run mvn commands properly. If mvn commands fails, please refer to Pre-requisites to install maven.
Open a command terminal and navigate to the java directory in the repo. Run the command mvn install. cd ../java mvn install
A jar file blockchain-java-sdk-0.0.1-SNAPSHOT-jar-with-dependencies.jar is built and can be found under the target folder. This jar can be renamed to blockchain-client.jar to keep the name short. cd target cp blockchain-java-sdk-0.0.1-SNAPSHOT-jar-with-dependencies.jar blockchain-client.jar
Copy this built jar into network_resources directory. This is required as the java code can access required artifacts during execution. cp blockchain-client.jar ../../network_resources
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