# Transaction sub-layer

**Focus:** Operations involving state changes.

**Objective**: Enable transaction processing across chains.

**Description**: Provides standards and protocols for coordinated execution of transactions involving multiple blockchains. Atomically commits state changes across chains.

**Layer owner:** Cross-chain protocol developers.

Some key aspects:

* Atomic commit protocols across chains
* Transaction validation rules
* Managing order and finality across chains
* Handling transaction timeouts and rollbacks
* Mapping transaction models across chains
* Access controls and permissions
* Batching and sequencing strategies
* Interfacing with external transaction systems
* Tooling for cross-chain transaction modeling


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