Solana M2: swap origination, SOL launch pairs, numéraire quoting

[LandynDev]

Solana M2: swap origination, SOL launch pairs, numéraire quoting

feat/solana-m2 → contract-v2

Summary

Un-stubs swap origination on Solana and flips the subnet to SOL-based launch pairs. A user can now drive a swap end-to-end (verified live on a local stack — see the alw-utils companion PR), and the rate machinery is re-anchored from the old TAO leg to the SOL leg.

What changed

Swap intake (was stubbed)

• solana/client.py — open_or_request + resolve_pool instruction builders (+ layouts disc/args, SLOT_HASHES). Account order/borsh cross-checked against the Rust #[derive(Accounts)].
• validator/solana_swap_loop.py + forward.py — default-on validator resolve-crank: each forward step resolves closed pools into reservations (idempotent, read-only-aware, fault-isolated).
• cli/swap_commands/swap_intake.py (new) — pure taker amount math: best-miner selection + sol_amount/from_amount/to_amount (SOL leg = the bounded notional), via the shared calculate_to_amount. swap.py:swap now wired to it.

SOL launch pairs + rate gate (B8)

• chains.py — canonical_pair re-anchored: SOL is the canonical source (rate reads "X per 1 SOL").
• constants.py — DIRECTION_POOLS flipped to sol↔btc / sol↔tao @ 0.25 each.
• utils/rate.py — is_executable_rate + min_executable_tao_leg→min_executable_sol_leg re-anchored from the TAO leg to the SOL leg (bounds are SOL lamports). Scoring call-sites updated. Dead TAO helpers removed.

SOL-numéraire quoting

• cli/swap_commands/numeraire.py (new) + alw miner quotes — one price per chain ("X per 1 SOL") derives every pair direction (optional symmetric spread). On-chain MinerQuote unchanged.

Reserve path

• validator/axon_handlers.py:handle_swap_reserve — restubbed as a simple FCFS entry (user → validator → on-behalf lottery): rejects if the miner is unbound/inactive/busy, else accepts. Removed the dead reservation_pins table (replaced by the on-chain Reservation PDA).

Program id

• Repointed declare_id! + Anchor.toml + pdas.PROGRAM_ID to a committed dev keypair.

⚠️ Reviewer notes (must read)

• The committed program keypair (smart-contracts/solana/target/deploy/allways_swap_manager-keypair.json) is DEV-ONLY — it exists so the local program id is reproducible across clones. Testnet/mainnet deploys use a separate, uncommitted keypair.
• handle_swap_reserve is an intentional FCFS stub — the user→validator entry point for the Ventura Labs browser-swap product. The on-behalf open_or_request call + request-window selection are a follow-up (not part of this PR).

Robustness (surfaced by the live --full stack)

• neurons/base/validator.py — resync_metagraph overran metagraph.hotkeys[uid] when the re-synced metagraph
  had fewer hotkeys than the cached self.hotkeys (a settling subnet); zip-truncate fix + 2 regression tests.
  Also: step-error handler now logs the origin file:line (the gap that made this hard to diagnose).

Testing

• 526 unit + 6 integration (live solana-test-validator) + 25 contract on-chain tests green; ruff clean.
• Full swap lifecycle verified live to COMPLETED in all four combos — sol↔btc (--fast) and sol↔tao
  (--full, real subtensor) — plus an asserted timeout-slash path (see the alw-utils full-e2e.sh PR).