Uniswap v4 hook risk levels and flags (Robinhood Chain)

How Crius rates every Uniswap v4 hook on Robinhood Chain, from its permissions, its code and owner, what happened in its pools and its code family's record, with each risk flag and its threshold.

A Uniswap v4 hook is a contract the pool calls around swaps and liquidity changes. It can take a fee, change swap amounts, block swaps or stop liquidity from moving, so a hook is part of a token’s risk even when the token’s own contract is clean. Crius rates every hook on Robinhood Chain from four kinds of evidence, turns each finding into a flag with a severity and an evidence sentence, and sets the hook’s risk_level to its worst flag.

Four kinds of evidence

Evidence	What it is	Field
Permissions	The callbacks the hook can run, fixed in the low 14 bits of its address when it is deployed. They say what the hook could do. See Uniswap v2, v3 & v4 for the table.	`permissions`, `flags_hex`, `capabilities`
Code	What sits at the address and who controls it: `kind` (`contract`, `minimal_proxy`, `upgradeable_proxy`, `beacon_proxy`, `delegated` wallet or `no_code`), `owner` and `ownership`, and the `admin_functions` found in its code (`fee_setter`, `pause`, `blacklist`, `withdraw`, `upgrade`, `arbitrary_call`).	`code`
Observed	What happened in its own pools. A pool counts as traded with 10+ trades; as a honeypot with 10+ buys and no sells; as pulled when 80%+ of the liquidity added was removed again; as taxed when its median tax is 1% or more over 5+ measured trades; as dynamic when its sell tax swings by 5 points or more.	`observed`
Family and pattern	The same record summed over every hook with the same code (`family`) and over every hook with the same swap permissions (`pattern`). A new hook carries its family's history.	`family`, `pattern`

Example Free plan · 2 credits

Shares, not counts: DopplerHookInitializer

DopplerHookInitializer (0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544) runs more pools than any other hook, and some of them were honeypots. Why is it low risk?

GET/v1/robinhood/hook/0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544

curl "https://api.crius.sh/v1/robinhood/hook/0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544" \
  -H "x-api-key: $CRIUS_API_KEY"

const res = await fetch("https://api.crius.sh/v1/robinhood/hook/0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544", {
  headers: { "x-api-key": process.env.CRIUS_API_KEY },
});
const { data, meta } = await res.json();

import os, requests

r = requests.get(
    "https://api.crius.sh/v1/robinhood/hook/0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544",
    headers={"x-api-key": os.environ["CRIUS_API_KEY"]},
)
body = r.json()
print(body["data"])

Real response 200 Captured Oct 28, 2026 · 124 lines (arrays trimmed)

{
  "data": {
    "abi_events": [
      "Collect(bytes32,uint256,uint256)",
      "Create(address,address,address)",
      "DelegateAuthority(address,address)"
    ],
    "address": "0x4e3468951d49f2eea976ed0d6e75ffcb44a9a544",
    "attribution": "unattributed",
    "capabilities": {
      "can_block_swaps": false,
      "can_gate_liquidity": false,
      "can_modify_liquidity_amounts": false,
      "can_modify_swap_amounts": true
    },
    "code": {
      "admin_functions": [],
      "checked_ts": 1793207143998,
      "code_hash": "0xc41a91106002f15bf70ae266824317f3f3ac638ac72ca5253bae395fa47ee631",
      "family": "0xaa37a5a3457a",
      "kind": "contract",
      "logic": null,
      "owner": null,
      "ownership": "none",
      "size": 25533
    },
    "events": [
      {
        "emitted_in_scan": 7796,
        "event": "Swap(address,(address,address,uint24,int24,address),bytes32,(bool,int256,uint160),int128,int128,bytes)",
        "topic0": "0x1d9f7b5e406d8c887155e1a78e070d2d41c5d0444dab8b21612f846835c27183"
      },
      {
        "emitted_in_scan": 1724,
        "event": "ModifyLiquidity((address,address,uint24,int24,address),(int24,int24,int256,bytes32))",
        "topic0": "0xdb675a606e5aa8f039e93c54673258dc875053bdaa5dbb96de1670bfdece53b3"
      },
      {
        "emitted_in_scan": 545,
        "event": "Create(address,address,address)",
        "topic0": "0xb224da6575b2c2ffd42454faedb236f7dbe5f92a0c96bb99c0273dbe98464c7e"
      }
    ],
    "family": {
      "honeypot_pct": 0.0318652,
      "hooks": 1,
      "id": "0xaa37a5a3457a",
      "liquidity_pulled_pct": 0.0389463,
      "pools_traded": 28244,
      "taxed_pct": 1.78091,
      "verified_hooks": 1
    },
    "fee_tiers_in_scan": [
      {
        "fee": 10000,
        "pools": 3
      },
      {
        "fee": 15000,
        "pools": 2
      },
      {
        "fee": 16000,
        "pools": 1
      }
    ],
    "flags": [],
    "flags_hex": "0x2544",
    "launchpad": null,
    "launchpad_name": null,
    "name": "DopplerHookInitializer",
    "observed": {
      "dynamic_tax_pools": 24,
      "first_trade_ts": 1782922953000,
      "honeypot_pools": 9,
      "last_trade_ts": 1793223683000,
      "liquidity_pulled_pct": 0.0389463,
      "liquidity_pulled_pools": 11,
      "max_buy_tax_pct": 99.52,
      "max_sell_tax_pct": 93.49,
      "median_pool_life_min": 2138,
      "pools": 224061,
      "pools_traded": 28244,
      "tax_measured_pools": 5814,
      "taxed_10pct_pools": 29,
      "taxed_pools": 503,
      "volume_usd": 1968346259
    },
    "pattern": {
      "description": "hooks that change swap amounts only",
      "honeypot_pct": 0.0696347,
      "id": "swap_delta_only",
      "liquidity_pulled_pct": 7.93603,
      "pools_traded": 43082,
      "taxed_pct": 15.7537
    },
    "permissions": [
      "beforeInitialize",
      "afterAddLiquidity",
      "afterRemoveLiquidity"
    ],
    "pools": 224090,
    "risk": [
      "can_modify_swap_amounts"
    ],
    "risk_level": "low",
    "stats": {
      "pools_created_24h": 1181,
      "trades_24h": 59387,
      "volume_usd_24h": 7478239
    },
    "verified": true
  },
  "meta": {
    "block": 100406861,
    "block_age_ms": 985,
    "block_ts": 1793225084000,
    "chain": "robinhood",
    "finalized_block": 100397649,
    "intel_computed_ts": 1793223685333,
    "lag_ms": 107,
    "safe_block": 100401329
  }
}

What this tells you

observed.honeypot_pools: 9 and liquidity_pulled_pools: 11 out of pools_traded: 28244. In absolute numbers that sounds bad; as shares it is 0.03% and 0.04% (family.honeypot_pct: 0.0318652, liquidity_pulled_pct: 0.0389463).
observed.max_buy_tax_pct: 99.52 is one pool’s tax; only 29 of 5,814 measured pools take 10% or more (taxed_10pct_pools, tax_measured_pools), far short of the half that would flag high_tax_observed.
verified: true and code.ownership: "none": a known protocol hook with no owner, so its permissions and pattern don’t add flags. flags: [], risk_level: "low".
pattern.id: "swap_delta_only": hooks that change swap amounts but can’t block swaps. Across 43,082 traded pools, 0.07% of them became honeypots.
events shows what it emits (7,796 Swap and 1,724 ModifyLiquidity events in the scan) and fee_tiers_in_scan the pool fees seen, such as 10000 (1%) in 3 pools.

Hook detail reference Data looks wrong? Report it

Risk flags

Flag	Severity	Raised when
`no_code`	critical	There is no contract at the hook address: every callback the pool makes to it fails.
`delegated_wallet`	critical	The hook is a wallet delegating to code (EIP-7702): its owner can replace the code at any time.
`honeypot_observed`	critical	20% or more of its own traded pools had 10+ buys and no sells.
`honeypot_family`	critical	20% or more of its code family's traded pools (10+ needed) became honeypots.
`rug_family`	high (medium with a clean record)	Liquidity was pulled in 80% or more of its family's traded pools.
`rugs_observed`	high	Liquidity was pulled in 80% or more of its own traded pools (3+ needed).
`can_block_swaps`	high (medium with a clean record)	It runs before swaps without taking a delta, a pattern with a high honeypot rate. The evidence quotes that rate.
`high_tax_observed`	high	Half or more of its measured pools take 10% or more per trade.
`upgradeable`	medium	It is an upgradeable or beacon proxy: what it does can change after launch.
`tax_observed`	medium	A fifth or more of its measured pools take 1% or more per trade.
`dynamic_tax`	medium	A tenth or more of its measured pools had their tax swing by 5 points or more.
`honeypot_pools_seen`	medium	Some of its pools were honeypots, but fewer than 20%.
`fee_changeable`	medium	It has a fee or tax setter and an owner that hasn't renounced.
`owner_controls`	medium	Its owner can call pause, blacklist, withdraw, upgrade or arbitrary-call functions.
`new_unknown`	medium	Its first trade was under 24 hours ago and its code family has fewer than 10 traded pools.
`can_modify_swap_amounts`	low	It can take part of every swap. For information: this is how launchpad fee hooks work, and the safest pattern on chain.

Real examples of the critical flags, with their evidence sentences (no_code with 142 of 143 pools rugged, honeypot_family, honeypot_observed), are in the critical hooks example.

A clean record is 20+ traded pools of its own, no honeypots and liquidity pulled in under a fifth of them. It outweighs the family and permission statistics, which is why those two flags drop to medium for a hook that has proven itself.

Verified hooks (verified: true: launchpads and known protocols) can only get honeypot_observed, high_tax_observed and dynamic_tax from what happened in their pools, and no_code or delegated_wallet from their code. Family, permission and ownership flags, and the milder tax and honeypot flags, don’t apply to them.

How hook risk reaches a token

/security attaches the hook of the pool the token is priced from. The token loses 60 points for a critical hook (hook_critical_risk, which also makes the token high risk), 30 for high (hook_high_risk) and 10 for medium (hook_medium_risk). If the hook can block swaps, hook_can_block_swaps is listed for information. For an example of a medium-risk hook that taxes, and how to show the evidence in an app, see Check the risk of a Uniswap v4 hook.

Frequently asked questions

What is a hook code family?

Hooks whose code has the same set of functions belong to one family, even when values set at deployment differ. Families are how a hook deployed a minute ago can already have a history: if other hooks with the same code trapped their buyers, the new one is flagged honeypot_family. Hook 0x593da569c2a5a6999f59fcc5b06477d8bb4dc080 is critical with no traded pools of its own, because 94% of the 35 traded pools of its family 0x6f11e9734465 (34 hooks) became honeypots.

Why are verified hooks treated differently?

Hooks verified in Crius's registry (launchpad and known protocol hooks) have known code and a known operator, so their permissions and family statistics say little. They are judged only on what happened in their own pools, and a launchpad's standard fee isn't flagged as a tax.

Can a hook's risk level change?

Yes. Risk is recomputed every 30 minutes from what happens in its pools, and hooks whose code can change (proxies, delegated wallets) are re-inspected every 6 hours. A new hook with no history can drop from high to medium once it has a long clean record of its own.

Guide Check v4 hook risk Find out what a Robinhood Chain token's Uniswap v4 hook can do and what happened in its pools (taxes, honeypots, rugs). Real examples, including critical hooks. Read Concept Uniswap v2, v3 & v4 How Crius indexes Uniswap v2 pairs, v3 concentrated-liquidity pools and v4 singleton pools with hooks on Robinhood Chain, including liquidity definitions and v4 hook permissions. Read Guide Check token taxes Get the real buy and sell tax of any Robinhood Chain token in one call, measured from recent trades and checked by simulation. Real examples with a 5% sell tax and a 7% buy tax. Read Guide Token security score Score any Robinhood Chain token from 0 to 100 with one API call. Honeypot, buy and sell taxes, owner powers, LP locks, v4 hook risk and insider launches, with real examples. Read API reference Hook detail API One hook: decoded permissions, code (kind, owner, admin functions), what happened in its pools, its code family's history, flags with evidence and risk level, and the events it emits. Read

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Uniswap v4 hook risk: levels, flags and code families