Architecture

Three programs:

• oracle core, for requests, fees, and callbacks
• oracle registry, for nodes, stake, heartbeats, and slash
• verification, for proofs and later challenges

Decision records live in this repository under architecture/adr/. They are the source of truth:

• ADR 0001  — program split and the transition graph
• ADR 0002  — PDA seeds, authority, and rent
• ADR 0003  — eligibility predicate for VRF fulfillment; no weighted draw
• ADR 0004  — solana-ecvrf 0.0.1, with no audit found
• ADR 0005  — fee roles; basis points are not chosen
• ADR 0006  — callback with zero accounts
• ADR 0007  — multisig upgrades; nothing is deployed