Solana SVM Integration

u64se-seu-solana interfaces natively with the Solana Sealevel Virtual Machine (SVM) through zero-copy byte buffers and raw SBF syscalls.

Operating Modes

u64se-seu-solana can operate in two primary on-chain modes:

Mode 1: Stateless Session Proof Verifier (Zero Rent)

In this mode, the program does not persist state to a writable account on-chain. Instead:

1. The caller provides the current state word, target coordinates, and authority signature in instruction data.
2. The SBF kernel executes the branchless ALU invariant pipeline (~8 CU).
3. If valid, the new verified state word is set into Solana’s return data buffer via sol_set_return_data and emitted as a high-speed verification receipt.
4. Economic Result: 0 Lamports rent, 0 write locks, 0 account contention.

Mode 2: Persistent State PDA (8 Bytes)

For applications requiring on-chain persistence:

1. A canonical PDA is derived via ["u64se-seu", authority_pubkey, bump].
2. The account allocation is fixed at exactly 8 bytes (size_of::<u64>()).
3. State transitions write the new 64-bit word directly into account.data[0..8].
4. Rent Cost: Minimum rent-exempt reserve for 8 bytes (~0.00089 SOL).