Definition
The V2F Engine operates under a deterministic execution model.
Given identical rules and identical inputs, the system produces identical outputs.
Execution
Execution behavior is fixed, reproducible, and invariant over time.
Payer-defined rules function as authoritative inputs. Execution follows invariant paths and behaves as a pure function of supplied rules and inputs.
Audit Boundary
All execution occurs within an immutable audit boundary.
Execution artifacts are recorded at runtime, preserved in read-only form, and cryptographically hashed and signed. Once recorded, artifacts cannot be altered or corrected.
Guarantee Scope
The execution model guarantees deterministic behavior with immutable, cryptographically verifiable proof of execution.