Bridge tracks nonce-consumed mapping

Synapse Protocol's assessment for RD-F-153 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

Legacy SynapseBridge: kappaMap (mapping bytes32->bool) with require(!kappaMap[kappa]) — explicit replay prevention. RFQ FastBridge: nonce++ per tx; FastBridgeV2: senderNonces[sender]++ per-sender nonce. All models prevent replay.

Sources #

GitHub
https://github.com/synapsecns/synapse-contracts/blob/master/contracts/bridge/SynapseBridge.solretrieved 2026-04-26

Methodology #

Determine whether the bridge inbox maintains a nonce-consumed mapping and rejects replay of used nonces.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol synapse factor RD-F-153 score green collected_at 2026-04-26 21:35:35