Gtjkyu

Hyperledger Composer Rest Server connection with Cloudant I'm trying to use Cloudant NoSQL DB as a persistent data source for my blockchain identities in my composer rest server. I have the composer-rest server setup in multiuser mode and is using google OAuth for authentication. I have looked at this question (Hyperledger Composer Rest Server connection with Cloudant NoSQL DB) but I'm still experiencing problems. If I do a composer card list in my terminal I can see the cards in my cloudant database. However, if I do a http get method from my rest server it returns an empty array. I have the COMPOSER_DATSOURCES variable set to {"db": { "name": "db", "connector": "cloudant", "username": "83bcdcfc-327b-xxxxxxxxxxxxx4e0ba4a9-bluemix", "password": "01e6d7xxxxxxxxxxxxxxxxb29adcc85ab35ce9ba", "database": "wallet" } } In cloudant, I have one database called wallet ...

Difference between hyperledger composer and hyperledger fabric? I am java developer and new to hyperledger. I am interested in learning it and need to know where to start . fabric vs composer? 5 Answers 5 Hyperledger Composer simplifies application development on top of the Hyperledger Fabric blockchain infrastructure. If you are interested in the blockchain infrastructure, start with the Fabric tutorials. If you are interested in blockchain applications, start with the Composer tutorials. The Fabric tutorials also include samples of low level chaincode development (in golang). Composer is a higher level application development framework. I'd suggest trying both to get an overall view of the capabilities. As a Java developer, you will also want to check out the Fabric Java SDK for building Java client applications that interact with the blockchain. There is also Java chaincode capability under c...

Difference between various blockchain protocols As the developers are constantly using different network protocols of blockchain such as Hyperledger, multichain, Ethereum, Corda, and others. Community will appreciate if the developers & blockchain enthusiasts can pour in some key differences between various types of blockchains as mentioned above. Thanks ! One of the main differences lies with the consensus algorithm the blockchain is using they are all solving the consensus problem but in different ways – Mat0 Jan 24 '17 at 22:02 9 Answers 9 This is a good question, though not one easily addressed with a simple answer. As @Mat0 commented above, one difference is the approaches that the various platforms are using to achieve consensus. Some use p...