Application Binary Interface (ABI)

Overview

An ABI is a machine-readable contract describing how software encodes calls, arguments, return values, and events when interacting with compiled code. In smart contract platforms, an ABI commonly describes public functions, input and output types, errors, and emitted events. ABI encoding is generally not self-describing, so the correct schema must accompany the bytes. Integrations should version ABI artifacts alongside deployed contract addresses and verified source releases. It specifies callable functions, data types, memory conventions, and binary layouts so independently built components can exchange information correctly. A mismatched or outdated ABI can select the wrong function, corrupt parameter interpretation, or hide events. An application binary interface defines the low-level boundary between compiled programs or between a program and an operating system. Client libraries use that description to encode a method call into bytes and decode the returned data or transaction logs. The Application Binary Interface (ABI) runbook should define who can retry, cancel, replay, reconcile, communicate, and approve an exception. The production boundary for Application Binary Interface (ABI) should identify the authoritative system, responsible owner, accepted states, and recovery path. Evidence for Application Binary Interface (ABI) should preserve the input, configuration version, actor or service, decision, downstream reference, and final outcome.

Testing Application Binary Interface (ABI) should cover boundary values, dependency failure, restart recovery, and incompatible versions where they affect the workflow.

Operational metrics for Application Binary Interface (ABI) should use stable denominators and separate technical activity from successful business completion.

For Application Binary Interface (ABI), identifiers and timestamps should remain stable enough to trace the technical action to its final business outcome.