Add EulerSwap hook on ethereum

[hooklist-generator]

Summary

A Uniswap v4 hook implementing a custom AMM backed by Euler Finance lending vaults. Swaps are fully handled in beforeSwap: input tokens are deposited into Euler vaults and output tokens are withdrawn, with pricing enforced by a configurable bonding curve (CurveLib). Standard concentrated liquidity operations are blocked; a single LP provides liquidity exclusively through Euler vaults.

Flags

Flag	Value
beforeInitialize	true
afterInitialize	false
beforeAddLiquidity	true
afterAddLiquidity	false
beforeRemoveLiquidity	false
afterRemoveLiquidity	false
beforeSwap	true
afterSwap	false
beforeDonate	true
afterDonate	false
beforeSwapReturnsDelta	true
afterSwapReturnsDelta	false
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 "EulerSwap".
• Submitter did not provide a description. Using AI-generated description.

Closes #7154

[github-actions]

Review: hooks/ethereum/0x0844aedb1b2e022222e22214156a10ff1d86e8a8.json

Flags

Address suffix 0xe8a8 decodes to 1110 1000 1010 1000 (binary). The lowest 14 bits:

Bit	Flag	Address	File
13	beforeInitialize	1	true ✓
12	afterInitialize	0	false ✓
11	beforeAddLiquidity	1	true ✓
10	afterAddLiquidity	0	false ✓
9	beforeRemoveLiquidity	0	false ✓
8	afterRemoveLiquidity	0	false ✓
7	beforeSwap	1	true ✓
6	afterSwap	0	false ✓
5	beforeDonate	1	true ✓
4	afterDonate	0	false ✓
3	beforeSwapReturnsDelta	1	true ✓
2	afterSwapReturnsDelta	0	false ✓
1	afterAddLiquidityReturnsDelta	0	false ✓
0	afterRemoveLiquidityReturnsDelta	0	false ✓

All flags match getHookPermissions() in src_UniswapHook.sol.

Properties

• dynamicFee: false ✓ — _beforeSwap returns fee override of 0. Pool initialized with a fixed fee derived from p.fee / 1e12 (a static pips value). No updateDynamicLPFee() calls anywhere in source.

• upgradeable: false ✓ — The hook is deployed via EIP-3448 MetaProxy (minimal proxy with trailing calldata parameters via CtxLib.getParams()). The implementation address is fixed in the proxy bytecode at creation time and cannot be changed by any admin. source_meta.json also lists "proxy": false (Etherscan does not classify this as an upgradeable proxy). This is a deployment-time code pattern, not an upgrade path.

• requiresCustomSwapData: false ✓ — _beforeSwap's bytes calldata hookData parameter is entirely unused (not decoded). Swaps function correctly with empty hookData.

• vanillaSwap: false ✓ — Correct. beforeSwapReturnsDelta is true, and the hook takes full control of swap execution: it withdraws input tokens from PoolManager, deposits them into Euler vaults, withdraws output from Euler vaults, and returns a BeforeSwapDelta overriding the standard AMM calculation. This is explicitly non-vanilla behavior.

• swapAccess: "none" ✓ — _beforeSwap has no access control checks. Any address can swap through the pool.

Metadata

• verifiedSource: true ✓ — Confirmed by source_meta.json ("verified": true).
• chainId: 1 ✓ — Matches chains.json entry for "ethereum".
• name: "EulerSwap" ✓ — Matches contractName: "EulerSwap" from source metadata.
• description ✓ — Accurately describes the on-chain logic: swaps fully handled in beforeSwap via Euler vault deposits/withdrawals, pricing via CurveLib, concentrated liquidity blocked by beforeAddLiquidity/beforeDonate reverts, and single-LP architecture. No promotional or audit language.

All fields are correct.

[Ponx]

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