Add PactHook hook on ethereum

[hooklist-generator]

Summary

Charges a fixed 3% fee on each swap's output token, taking 2% to a game contract (pactGame) and 1% to a dev wallet (devWallet) via afterSwap with a return delta. Fee recipient addresses are mutable by an owner.

Flags

Flag	Value
beforeInitialize	false
afterInitialize	false
beforeAddLiquidity	false
afterAddLiquidity	false
beforeRemoveLiquidity	false
afterRemoveLiquidity	false
beforeSwap	false
afterSwap	true
beforeDonate	false
afterDonate	false
beforeSwapReturnsDelta	false
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 name. Using AI-derived "PactHook".
• Submitter did not provide a description. Using AI-generated description.
• Contract extends BaseTestHooks (a test contract from v4-core) rather than BaseHook — unusual for a production deployment.
• pactGame and devWallet addresses are mutable by owner with no timelock, creating centralization risk over fee routing.

Closes #7146

[github-actions]

Review: hooks/ethereum/0x9f3c19ad49f71f513817e4c40a53b0c5ce410044.json

Address Flags

Address suffix 0x0044 = 0b01000100 → lowest 14 bits confirmed:

• Bit 6 → afterSwap: true ✓
• Bit 2 → afterSwapReturnsDelta: true ✓
• All other bits = 0; all other flags false ✓

Properties

Property	Filed	Verdict
dynamicFee	false	✓ — No lpFeeOverride or updateDynamicLPFee(). Fee is a hardcoded 3% taken in afterSwap.
upgradeable	false	✓ — poolManager is immutable. pactGame/devWallet are mutable fee-recipient addresses, not upgradeable logic. No proxy, no delegatecall, no SELFDESTRUCT.
requiresCustomSwapData	false	✓ — hookData parameter is explicitly ignored in afterSwap.
vanillaSwap	false	✓ — afterSwapReturnsDelta is true; hook returns totalFee.toInt128() to take 3% of the output token, modifying what swappers receive.
swapAccess	"none"	✓ — No beforeSwap flag. The onlyPoolManager modifier on afterSwap is standard callback authentication, not swap-access gating.

Metadata

• verifiedSource: true — confirmed by source metadata ✓
• chainId: 1 — ethereum mainnet ✓
• name: "PactHook" — matches on-chain contract name ✓
• description — accurately describes the fixed 3% fee split (2% to pactGame, 1% to devWallet) via afterSwap return delta, with owner-controlled mutable recipient addresses ✓

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

[Ponx]

Bot review verified; bitmask/flags/properties check out. LGTM.