Add MemeFolioTaxHook hook on robinhood

[hooklist-generator]

Summary

Immutable 3% native-ETH swap tax hook for a single ETH/token pool. Tax is taken in beforeSwap (on buys) and afterSwap (on sells) via BeforeSwapDelta/AfterSwapDelta, stored as PoolManager claims, and permissionlessly distributed 2:1 to immutable buyback and treasury wallets.

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	false
upgradeable	false
requiresCustomSwapData	false
vanillaSwap	false
swapAccess	none

Warnings

• Submitter did not provide a description. Using AI-generated description.

Closes #1095

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Project	Deployment	Actions	Updated (UTC)
hooklist	Ready	Preview, Comment	Jul 16, 2026 3:08pm

[github-actions]

Review: hooks/robinhood/0x29a2a39143f5aafba61bb8c649bc7c7d50b1e0cc.json

Address Flags

Decoding the lower 14 bits of 0x...e0cc:
0xE0CC & 0x3FFF = 0x20CC → bits 13, 7, 6, 3, 2 are set.

Flag	Bit	Address	JSON	Source
beforeInitialize	13	✓	true	permissions.beforeInitialize = true
afterInitialize	12	✓	false	not set
beforeAddLiquidity	11	✓	false	not set
afterAddLiquidity	10	✓	false	not set
beforeRemoveLiquidity	9	✓	false	not set
afterRemoveLiquidity	8	✓	false	not set
beforeSwap	7	✓	true	permissions.beforeSwap = true
afterSwap	6	✓	true	permissions.afterSwap = true
beforeDonate	5	✓	false	not set
afterDonate	4	✓	false	not set
beforeSwapReturnsDelta	3	✓	true	permissions.beforeSwapReturnDelta = true
afterSwapReturnsDelta	2	✓	true	permissions.afterSwapReturnDelta = true
afterAddLiquidityReturnsDelta	1	✓	false	not set
afterRemoveLiquidityReturnsDelta	0	✓	false	not set

All flags match address bitmask and getHookPermissions().

Properties

• dynamicFee: false ✓ — _beforeSwap returns 0 as the fee override. The pool uses POOL_LP_FEE = 0 (static). poolManager.updateDynamicLPFee() is never called.
• upgradeable: false ✓ — No proxy, no delegatecall, no mutable implementation storage. source_meta.json confirms "proxy": false. Buyback/treasury wallets are immutable.
• requiresCustomSwapData: false ✓ — _beforeSwap and _afterSwap both accept bytes calldata but never read it. Swaps work correctly with empty hookData.
• vanillaSwap: false ✓ — Correct: beforeSwapReturnsDelta and afterSwapReturnsDelta are true and the hook extracts a 3% tax that modifies effective swap amounts.
• swapAccess: "none" ✓ — _beforeSwap only calls _validatePool(key) to verify pool identity (correct pool), but imposes no access control on the caller. Any address can swap.

Metadata

• verifiedSource: true ✓ — Confirmed by source_meta.json.
• chainId: 4663 ✓ — Matches chains.json entry for robinhood.
• name: "MemeFolioTaxHook" ✓ — Matches contractName in source_meta.json and the @title NatSpec in source.
• description ✓ — Accurate and factual:
  • "3% native-ETH swap tax" — TAX_BPS = 300, currency0 is address zero (native ETH) enforced by _validatePool.
  • "single ETH/token pool" — _validatePool restricts to exactly one pool (native + specific projectToken).
  • "beforeSwap (on buys) and afterSwap (on sells)" — _beforeSwap handles exact-input buy side when native ETH is the specified currency; _afterSwap handles the sell side.
  • "stored as PoolManager claims" — key.currency0.take(..., true) uses the claims accounting path.
  • "permissionlessly distributed 2:1" — collectNativeTax() has no access control; BUYBACK_BPS = 200, TREASURY_BPS = 100 (2:1 ratio).
  • "immutable buyback and treasury wallets" — both declared immutable, no setters.

No promotional, audit, safety, or endorsement language present.

Verdict

All flags, properties, and metadata are correct and substantiated by the on-chain source code.