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Feat/ninja commitment - #73
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Port of SN66 Ninja's content-addressed commitment to Ralph. - chain_layer/submission_commitment.py: readable, content-addressed commitment `ralph-submission:<submission_id>:<bundle_sha256>` (one per hotkey). build/parse/verify + canonical submission_id derivation (<hotkey[:16]>-<sha[:16]>) that resists id-spoofing - BittensorChain.commit_submission() (miner) + .verify_submission _commitment_onchain() (validator) — additive, do NOT change the legacy op1 handshake path; op1 cutover is a coordinated follow-up - vs legacy: validator reads WHICH bundle is current straight from chain (no hash reconstruction), and overwrite=update (no nonce race) - 9 tests: content-addressing, overwrite-as-update, anti-spoof, malformed Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- validator/inflight.py: InFlightGuard — at most one submission per hotkey evaluated at a time; the hotkey can submit again the moment its prior one is scored (NOT Ninja's one-shot). File-backed; claim/release/reconcile. - wire into run_epoch behind RALPH_ONE_IN_FLIGHT=1 (default OFF, so pulling it never changes live behavior): claim at loop top (defer extras), reconcile at epoch start (frees scored/crash-orphaned claims) — one bundle per hotkey per epoch, no per-bundle release needed - bounds validator GPU to <=1 eval/hotkey, kills the overwrite-race, zero tax on honest iterators; pairs with the on-chain set_commitment rate-limit + (future) op1 novelty-rejection for churn - 7 tests: claim/defer/release, idempotent reprocess, restart-persist, reconcile stale claims, corrupt-state safe Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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