# Protocol Contract

> The agreed rules of a protocol, such as its messages, formats and sequences, that both ends must honor.

Record: `lex:protocol-contract`
Kind: constraint
Layer: [Contracts Core](https://banes-lab.com/records/layer/contracts-core.md)
Canonical: https://banes-lab.com/ontology/lexicon#lex-protocol-contract

## category

- [Contracts / Interfaces / Compatibility](https://banes-lab.com/records/lex-category/contracts-interfaces-compatibility.md)

## referenced-by

- [Protocol Compatibility](https://banes-lab.com/records/arch/protocol-compatibility.md)