Every Solana payment still has three weak points: the signing key must come online, payments require live connectivity, and settlement leaves a public trail. Sirius Labs closes all three with MORA at the core of a three-layer stack. MORA enables offline authorization with cryptographic voucher chains, Ed25519 pre-verify, and SettledBlock PDAs. AirSign keeps keys air-gapped. GrayBox adds ECDH stealth receiving. Two deployed Anchor programs. 188 passing tests. Built on Solana-native primitives.