ABCI++
简介
ABCI++ 是 ABCI（Application Blockchain Interface，应用区块链接口）的一次重大演进。 与其前身一样，ABCI++ 是 CometBFT（一个状态机复制引擎）与实际被复制的状态机（即应用程序）之间的接口。 该 API 由一组方法组成，每个方法都对应一个Request 和 Response 消息类型。
这些方法始终由 CometBFT 发起。应用程序负责实现处理所有 ABCI++ 方法的逻辑。
因此，CometBFT 总是发送 Request* 消息，并接收作为返回结果的 Response* 消息。
所有 ABCI++ 消息和方法都定义在 protocol buffers 中。
这使得 CometBFT 能够与使用多种编程语言编写的应用程序协同运行。
本规范分为以下几个部分：
- 概览与基本概念 - 用于理解本规范其他部分所需的接口概览与概念。
- 方法 - 所有 ABCI++ 方法和消息类型的完整细节。
- 对应用程序的要求 - 为确保 CometBFT 的活性等性质而对应用程序逻辑提出的形式化要求。这些要求定义了 CometBFT 对应用程序的期望；第二部分则讨论 ABCI 应用状态管理及相关主题。
- CometBFT 的预期行为 - 规定 CometBFT 可能如何调用不同的 ABCI++ 方法。这部分说明了应用程序应当对 CometBFT 有何预期。
- 示例场景 - 通过具体场景说明，为什么应用程序需要考虑规范所规定的 CometBFT 各种行为。
- 客户端与服务端 - 面向希望实现自有 ABCI 应用服务端的读者。
ABCI++
Introduction
ABCI++ is a major evolution of ABCI (Application Blockchain Interface). Like its predecessor, ABCI++ is the interface between CometBFT (a state-machine replication engine) and the actual state machine being replicated (i.e., the Application). The API consists of a set of methods, each with a correspondingRequest and Response
message type.
The methods are always initiated by CometBFT. The Application implements its logic
for handling all ABCI++ methods.
Thus, CometBFT always sends the Request* messages and receives the Response* messages
in return.
All ABCI++ messages and methods are defined in protocol buffers.
This allows CometBFT to run with applications written in many programming languages.
This specification is split as follows:
- Overview and basic concepts - interface’s overview and concepts needed to understand other parts of this specification.
- Methods - complete details on all ABCI++ methods and message types.
- Requirements for the Application - formal requirements on the Application’s logic to ensure CometBFT properties such as liveness. These requirements define what CometBFT expects from the Application; second part on managing ABCI application state and related topics.
- CometBFT’s expected behavior - specification of how the different ABCI++ methods may be called by CometBFT. This explains what the Application is to expect from CometBFT.
- Example scenarios - specific scenarios showing why the Application needs to account for any CometBFT’s behaviour prescribed by the specification.
- Client and Server - for those looking to implement their own ABCI application servers.