Application Blockchain Interface
The Application Blockchain Interface (ABCI) is a protocol that enables blockchain applications to be built in any programming language by separating the consensus engine from the application logic. It defines a standard interface between a blockchain's consensus layer (like Tendermint) and the application layer, allowing developers to write custom business logic without modifying the underlying consensus mechanism. This decoupling facilitates flexibility, interoperability, and easier development of decentralized applications (dApps) on blockchain networks.
Developers should learn ABCI when building custom blockchain applications that require specific business logic, such as in finance, supply chain, or gaming dApps, as it allows them to focus on application development without deep expertise in consensus algorithms. It is particularly useful in projects using Tendermint-based blockchains (e.g., Cosmos SDK) to create scalable and interoperable networks, enabling rapid prototyping and deployment of blockchain solutions across various industries.