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From "Niclas Hedhman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (POLYGENE-311) Blockchain Entitystore
Date Sun, 30 Sep 2018 01:47:00 GMT
Niclas Hedhman created POLYGENE-311:
---------------------------------------

             Summary: Blockchain Entitystore
                 Key: POLYGENE-311
                 URL: https://issues.apache.org/jira/browse/POLYGENE-311
             Project: Polygene
          Issue Type: New Feature
            Reporter: Niclas Hedhman
            Assignee: Niclas Hedhman
         Attachments: blockchain-architecture.png

With blockchain technology becoming more and more prevalent in our industry, we should add
support for blockchain operations and storage.

The first and easiest way to get enough experience with blockchain is to implement an EntityStore
being backed by a blockchain.

Since there are some many different ways one can go about it, we need a great deal of flexibility
for the users. A proposed architecture is attached to this issue, but also present in Git
https://github.com/apache/polygene-java/blob/develop/artwork/blockchain-architecture.png

The major recurring flexibility concern will revolve around "signing". It needs to be possible
for Polygene applications to delegate to the actual user of such application, as apps shouldn't
hold private keys of its users.

The storage of the data needs to be split in two, as storage on blockchain is relatively expensive,
so the blockchain is primarily for storing Identities back a the secondary store which should
be immutable, fully distributed and preferably decentralized. One such store exists, namely
IPFS. However, if decentralization is not a requirement, then HDFS, Cassandra, SQL and almost
any type of store could be used.



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