Extensible Data Persistence Model

[nazarhussain]

Purpose of this task is to use a Extended Data Mapper pattern for the database component outlined by the LIP “Introduce new flexible, resilient and modular architecture for Lisk Core”. The proposed model will help to extend and maintain the persistence layer of Lisk Core by being generic, easy to understand and organized.

1. Create basic structure for entities and storage initialization Create basic structure for entities and storage initialization #2613
2. Create Account entity with CRUD operations and unit tests Create Account entity with CRUD operations and unit tests  #2614
3. Create Block entity with CRUD operations and unit tests Create Block entity with CRUD operations and unit tests  #2615
4. Create Transaction entity with CRUD operations and unit tests Create Transaction entity with CRUD operations and unit tests  #2616
5. Create Peer entity with CRUD operations and unit tests Create Peer entity with CRUD operations and unit tests  #2617
6. Create Round entity with CRUD operations and unit tests Create Round entity with CRUD operations and unit tests  #2618
7. Create Migration entity with CRUD operations and unit tests Create Migration entity with CRUD operations and unit tests  #2619
8. Replace db.accounts.list, modules.accounts[.shared].get* and logic.account.get*
   with storage.entieis.Account.get Replace account getter interfaces with storage.entities.Account.get #2620
9. Replace db.transactions.list and modules.transactions[.shared].get*
   with storage.entieis.Transaction.get Replace transactions getter interfaces with storage.entities.Transaction.get #2621
10. Replace db.blocks.list and modules.blocks[.shared].list*
    with storage.entieis.Transaction.get Replace blocks getter interfaces with storage.entities.Block.get #2622
11. Refactor modules.accounts[.shared] namespace Refactor modules.accounts[.shared] namespace #2623
12. Refactor modules.transactions[.shared] namespace Refactor modules.transactions[.shared] namespace #2624
13. Refactor modules.blocks[.shared] namespace Refactor modules.blocks[.shared] namespace #2625
14. Replace db.migration and move custom interfaces to storage.entities.Migration Remove db.migration repository #2626
15. Replace db.accounts and move custom interfaces to storage.entities.Account Remove db.accounts repository  #2627
16. Replace db.transactions and move custom interfaces to storage.entities.Transaction Remove db.transactions repository  #2628
17. Replace db.blocks and move custom interfaces to storage.entities.Block Remove db.blocks repository #2629
18. Replace db.rounds and move custom interfaces to storage.entities.Round Remove db.rounds repository #2630
19. Replace db.peers and move custom interfaces to storage.entities.Peer Remove db.peers repository #2631
20. Scan all modules to find interfaces which can be replaced by storage.entities Clean db namespace and remove its reference usage #2632

[MaciejBaj]

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