Add PlebIndexFeeHook hook on robinhood

[hooklist-generator]

Summary

Charges an immutable ETH trade tax (up to 4%) on PLEB/ETH pool swaps, diverting the fee directly to a fixed treasury address via BeforeSwapDelta and AfterSwapDelta. Restricts pool initialization to native-ETH/PLEB pairs; has no owner or upgrade mechanism.

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-proposed description rejected: contains unverifiable claim about treasury behavior ("buys a basket of Robinhood Chain memecoins") not derivable from the hook source, and includes external URLs. Using AI-generated description.

Closes #1058

[vercel]

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Project	Deployment	Actions	Updated (UTC)
hooklist	Ready	Preview, Comment	Jul 12, 2026 3:23am

[github-actions]

Review: hooks/robinhood/0xa507e8c472918338c6c15eb894c9703581b060cc.json

Address Flag Verification

Address 0xa507e8c472918338c6c15eb894c9703581b060cc, lowest 14 bits = 0x60cc & 0x3FFF = 0x20cc = 0b10_0000_1100_1100:

Bit	Flag	Expected	File
13	beforeInitialize	true	true ✓
12	afterInitialize	false	false ✓
11–8	liquidity hooks	false	false ✓
7	beforeSwap	true	true ✓
6	afterSwap	true	true ✓
5–4	donate	false	false ✓
3	beforeSwapReturnsDelta	true	true ✓
2	afterSwapReturnsDelta	true	true ✓
1–0	liquidity deltas	false	false ✓

Also confirmed against getHookPermissions() in source — all 14 bits match.

Properties Verification

• dynamicFee: false ✓ — _beforeSwap always returns 0 as the fee override; no call to updateDynamicLPFee().
• upgradeable: false ✓ — taxBps, treasury, and plebToken are all immutable; no proxy pattern, no delegatecall, no SELFDESTRUCT.
• requiresCustomSwapData: false ✓ — The bytes calldata hookData parameter is unused in both _beforeSwap and _afterSwap.
• vanillaSwap: false ✓ — Correctly false: beforeSwapReturnsDelta and afterSwapReturnsDelta are both true, and the hook materially changes swap execution by diverting ETH fees to treasury via delta accounting.
• swapAccess: "none" ✓ — _beforeSwap contains no access control. The only restriction is in _beforeInitialize (pool creation gating), which is orthogonal to swap access.

Metadata Verification

• chainId: 4663 ✓ — Matches robinhood in chains.json.
• name: "PlebIndexFeeHook" ✓ — Exact match with both the contract name and the NatSpec @title.
• verifiedSource: true ✓ — Confirmed by source_meta.json.
• description ✓ — Accurately describes: immutable trade tax up to 4% (MAX_TAX_BPS = 400), fee sent to treasury via BeforeSwapDelta/AfterSwapDelta, restriction to native-ETH/PLEB pools via beforeInitialize, no owner or upgrade mechanism. No promotional or endorsement language present.
• deployer — Not verifiable from source alone; no issues found.

All fields are consistent with the on-chain verified source code.

[marktoda]

Bot review verified. PlebIndexFeeHook — index-fee hook on robinhood. Bitmask 0x20cc → beforeInitialize, beforeSwap, afterSwap, beforeSwapReturnsDelta, afterSwapReturnsDelta. Desc length 255/500 OK. LGTM.