Add SudoCatHook hook on robinhood

[hooklist-generator]

Summary

Single-pool hook for a native ETH / SudoCat token pair. Applies a 2% LP fee via dynamic fee override and takes a 3% routing fee per swap: ETH buy-side fees fund holder rewards claimable from the hook; token sell-side fees are permanently burned. Six immutable fee-exempt addresses can bypass all fees by providing EIP-712 signed hookData.

Flags

Flag	Value
beforeInitialize	true
afterInitialize	false
beforeAddLiquidity	false
afterAddLiquidity	false
beforeRemoveLiquidity	false
afterRemoveLiquidity	false
beforeSwap	true
afterSwap	true
beforeDonate	false
afterDonate	false
beforeSwapReturnsDelta	true
afterSwapReturnsDelta	true
afterAddLiquidityReturnsDelta	false
afterRemoveLiquidityReturnsDelta	false

Properties

Property	Value
dynamicFee	true
upgradeable	false
requiresCustomSwapData	false
vanillaSwap	false
swapAccess	none

Warnings

• Submitter-proposed description rejected: contains external website URL ("Website: https://thesudo.cat") — promotional content not verifiable from source. Using AI-generated description.

Closes #4477

[vercel]

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Project	Deployment	Actions	Updated
hooklist	Ready	Preview	Sep 11, 2026 7:15pm UTC

[github-actions]

Review: hooks/robinhood/0xa35ebc56f0a1cb4762eabd788dad8606667da0cc.json

Address Flag Verification

Decoding the lowest 14 bits of 0xa35ebc56f0a1cb4762eabd788dad8606667da0cc:

• Last byte 0xcc = 11001100₂ (bits 0–7)
• Second-to-last byte 0xa0 = 10100000₂ (bits 8–15)

Flags derived: beforeInitialize=1, afterInitialize=0, beforeAddLiquidity=0, afterAddLiquidity=0, beforeRemoveLiquidity=0, afterRemoveLiquidity=0, beforeSwap=1, afterSwap=1, beforeDonate=0, afterDonate=0, beforeSwapReturnsDelta=1, afterSwapReturnsDelta=1, afterAddLiquidityReturnsDelta=0, afterRemoveLiquidityReturnsDelta=0.

All 14 flags match the flags section exactly, and are confirmed by getHookPermissions() in the source.

Properties Verification

• dynamicFee=true ✓ — _beforeSwap returns LP_FEE_PIPS | LPFeeLibrary.OVERRIDE_FEE_FLAG (20_000 = 2%), and the pool is initialized with LPFeeLibrary.DYNAMIC_FEE_FLAG.
• upgradeable=false ✓ — No proxy pattern, no delegatecall to mutable addresses, no SELFDESTRUCT. The VERIFIER_ADMIN role can only rotate the game-result signing key after a 48-hour time-lock delay; it has no control over pool or fee logic.
• requiresCustomSwapData=false ✓ — hookData is optional. _beforeSwap only enters the fee-exemption path when hookData.length != 0; otherwise swaps proceed normally with full fees. _afterSwap skips routing on the output side when hookData is provided but otherwise functions correctly.
• vanillaSwap=false ✓ — Correct: beforeSwapReturnsDelta and afterSwapReturnsDelta are both true; the hook extracts 3% routing fees from swap inputs/outputs, materially changing swap execution.
• swapAccess="none" ✓ — _beforeSwap contains no user access control. _requireOfficialPool is pool-key validation (not user gating). Any address may swap freely.

Metadata Verification

• chainId=4663 ✓ — Matches chains.json for "robinhood".
• name="SudoCatHook" ✓ — Matches the verified contract name in source and source_meta.json.
• verifiedSource=true ✓ — Confirmed by source_meta.json.
• description ✓ — All technical claims are substantiated by the Solidity logic: 2% LP fee (LP_FEE_PIPS=20_000), 3% routing fee (ROUTING_FEE_PPM=30_000), ETH buy-side fees fund holder rewards via token.fundRewards(), sell-side fees permanently burned via token.protocolBurn(), six immutable fee-exempt wallets that bypass all fees (both routing and LP fee set to 0) when providing a valid EIP-712 signed hookData. No promotional, audit, or safety language present.

All flags, properties, and metadata are correct and consistent with the on-chain source code.