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2019

Oracle Blockchain Quick Start Guide – A book explains blockchain and BAAS

Want to start learning Blockchain and be comfortable in building an enterprise blockchain solution using the Oracle Blockchain Platform? Hope this book “Oracle Blockchain Quick Start Guide – A practical approach to implementing blockchain in your enterprise” (Authored by Vivek Acharya, Nimesh Prakash, and Me, published by Packt) would help you.This book is intended to become a quick reference to learn Blockchain,…

Invoking/executing rich query in Oracle Blockchain Platform (OBP)

Hyperledger blockchain ledger is storing data in Key-Value pairs. So, if to fetch the data from the ledger, we will pass the key. But do you know, we can query the ledger without the key aswell.Hyperledger blockchain is providing an option to query the ledger using a rich query. ChaincodeStub class has a method getQueryResult() which does this job. Please note…

Oracle blockchain error: chaincode fingerprint mismatch data mismatch

There are two Organizations (one is the founder and the other is a participant) in a channel (channel name is team1)  in Oracle blockchain network. A chaincode (chain code name is “oow”) is deployed and instantiated with version v1 in the founder. A line in the chaincode is changed and deployed the code in the participant with the same version…

Oracle blockchain error: executing chaincode premature execution

I received the below error while executing a rest service of a participant in the Oracle Blockchain network. I deployed and instantiated successfully a new version of a chain code into all the participants of a channel in the network. While executing the corresponding rest service, it has thrown the below error. This is because I executed the rest service…

OBP – Writing Blockchain chaincode in Node JS

This post is to show how to write a chain code in NodeJS. Since version 1.2, the opensource Hyperledger fabric blockchain framework supports nodeJS to write chain codes. As Oracle Blockchain Platform (OBP) built on Hyperledger fabric and it upgrades to Hyperledger fabric 1.3 (latest version), we can also write chain codes using NodeJS in OBP. Let’s see a sample…

Configure Rich History in Oracle Blockchain Platform

Connecting Oracle Autonomous Transactional Process (ATP) as a Rich History Database in Oracle Blockchain Platform is very easy. It takes just a few configuration steps. Let’s see, how to do the configuration. Get the ATP connection details. For this, log in to ATP service console Download wallet package file and copy the TNS name for the connection string to be…

Introduction to Oracle Blockchain Cloud Service (OBCS) – Blockchain made easy

“Blockchain” is the most buzzing word in the industry at present. I am fortunate to be part of this technology and starting my blog writings/learnings on this technology with this post. In this post, we will see how the Oracle Blockchain Cloud Service (OBCS) looks like its console, features and how Oracle made blockchain easy. #OBCS is built on open…

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