Add EulerSwap hook on ethereum

[hooklist-generator]

Summary

A custom-curve AMM hook for Uniswap v4 that routes swaps through Euler lending vaults: input tokens are deposited into and output tokens are withdrawn from Euler vaults, with each swap verified against a custom reserve curve invariant. Standard LP positions and donations are intentionally blocked.

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 #7103

[vercel]

Deployment failed for project hooklist with the following error:

Resource is limited - try again in 60 minutes (more than 450, code: "api-deployments-paid-per-hour").

Learn More: https://vercel.com/uniswap?upgradeToPro=build-rate-limit

[vercel]

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Project	Deployment	Actions	Updated
hooklist	Ready	Preview	Sep 16, 2026 9:14pm UTC

[github-actions]

Review: hooks/ethereum/0x75ea81012d8b2c618f1c01c4dba364addfdba8a8.json

Flags Verification

Address last 2 bytes: 0xa8a8 = 1010100010101000 binary.

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 ✓

Also confirmed by getHookPermissions() in UniswapHook.sol.

Properties Verification

• dynamicFee: false ✓ — _beforeSwap returns (selector, returnDelta, 0) with fee override hardcoded to 0. No call to poolManager.updateDynamicLPFee() anywhere in the hook source.

• upgradeable: false ✓ — No upgradeTo, no SELFDESTRUCT, no mutable implementation slot in the source. The contract uses immutable evc and poolManager addresses. EulerSwap instances are minimal delegatecall proxies pointing to a fixed implementation; the implementation address is not admin-configurable.

• requiresCustomSwapData: false ✓ — The bytes calldata parameter in _beforeSwap is unnamed and completely ignored. Swaps execute correctly without any hookData.

• vanillaSwap: false ✓ — beforeSwapReturnsDelta is true, and _beforeSwap completely overrides swap execution by routing tokens through Euler lending vaults (deposit input, withdraw output), verifying a custom reserve curve invariant. This is not vanilla swap behavior.

• swapAccess: "none" ✓ — _beforeSwap has no access control: no allowlist checks, no governance flags, no timestamp/block gating. Any caller may swap.

Metadata Verification

• verifiedSource: true ✓ — source_meta.json confirms "verified": true, contract name "EulerSwap".
• chainId: 1 ✓ — Ethereum mainnet.
• name: "EulerSwap" ✓ — Matches contractName from Etherscan.
• description ✓ — Accurately describes the on-chain logic: custom-curve AMM routing through Euler vaults, deposits input into and withdraws output from vaults, verifies reserve curve invariant, and intentionally blocks standard LP liquidity additions and donations via the beforeAddLiquidity and beforeDonate reverts.

All fields are correct.

[Ponx]

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