Resilientdb Versions Save

Support Multi-version Key-Value Interface. (Junchao Chen)

• Get and Set need to provide a version number to fetch the correct version of the data (if exists) or write to the correct version of data (if not overwritten already), respectively.
• Provide interfaces to obtain historical data with a specific version or a range of versions.

The view-change recovery protocol was extensively expanded to support the following Byzantine failures through primary/leader replacement and replica recovery. (Dakai Kang)

• Byzantine primary becomes non-responsive, stopping proposing any new Pre-Prepare messages.
• Byzantine primary equivocates, proposing two different client requests to two subsets of replicas.
• Byzantine replicas try to keep some non-faulty replicas in the dark.
• Byzantine new primary becomes non-responsive, refusing to broadcast New-View messages.

For each replica local recovery from durable storage upon system restart was added.

Refactoring and enhancement of the codebase to highlight the entire software stack of ResilientDB consisting of the following layers

• SDK Layer (C++, Python, Go, Solidity)
• Interface Layer (key-value, smart contract, UTXO)
• ResilientDB Database Connectivity (RDBC) API
• Platform Layer (consensus, chain, network, notary)
• Transaction Layer (execution runtime and in-memory chain state)
• Storage Layer (chain and chain state durability)

A complete refactoring of the code base such that (1) the core engine code is now moved to the platform folder, including the formwork architectures and protocols implementations; (2) the API/interface-related code is moved to the service folder, including UTXO, smart contract, and key-value interface; (3) the python SDK code is moved to a different repository here.

Creating a persistent release using Zenodo on the legacy codebase of ResilientDB (pre-NexRes).

Creating a persistent release using Zenodo.

Major Changes

Support of UTXO model and wallet integration: Detailed Documentation

Bugfix

Fix build fail from kv_server Fix build fail from Ubuntu 22

Major Changes

Added Python SDK that supports UTXO-like transactions such as asset creation, transfer, and multi-party validations. Added REST CROW endpoints to interface with the on-chain KV service. Extended KV service range queries.