The V4 Hook, refrigerated for 16 months, is evidence that Crypto Native is still alive.
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The V4 Hook, refrigerated for 16 months, is evidence that Crypto Native is still alive.
The market is never short of token issuance tools—it’s brilliant devs who can design mechanisms that are in short supply.
Navigating Web3 tides with focused insightsAuthor: Lacie Zhang, Researcher at Bitget Wallet
This year, the most frequently heard phrase across the industry has been: “Crypto is boring.” Liquidity has flowed into U.S. equities; talent has migrated to AI; and narratives can’t keep up with Claude’s update cadence.
Global venture capital is overwhelmingly concentrated in tech stocks—particularly memory, AI compute, semiconductors, and power infrastructure—in the U.S., South Korea, and Taiwan. Crypto, by contrast, is stuck in a zero-sum game. Memecoins on Solana and BNB Chain have devolved into PvP arenas where participants endlessly extract value from one another; “dog-fighting” traders lose nine times out of ten; and on-chain sentiment has deteriorated from occasional FOMO to outright despair.
Even crypto natives are beginning to doubt whether this ecosystem can still produce something original—not derivative, not trend-chasing—but authentically native to the space.
Just as many believed this memecoin cycle was nearing its end, a batch of assets with unusually opaque mechanics suddenly emerged on EVM chains—like zombies rising from the grave:
- uPEG (Unipeg): Discovered by the market on April 25, it surged ~15x to its peak by May 8. Each trade triggers an on-chain generation of a new 24×24 pixel unicorn NFT.
- Slonks / $SLOP: Launched as an NFT on May 1; within five days, its floor price jumped from mint price to 0.062 ETH, with $318 ETH traded in 24 hours. It embeds a 22.7 KB transformer model directly onto Ethereum mainnet to re-render CryptoPunks on-chain; the distortions and misalignments introduced during rendering constitute its core artistic expression.
- $SATO: Deployed on May 3; reached $1,076 ETH in contract reserves within 11 hours, peaking at nearly $40 million market cap. Minting automatically halts once supply reaches 99%, with no further issuance permitted.
- $SHIT (Dogeshit): Launched on May 9. A memecoin minted exclusively by an AI agent: users cannot manually call the contract—they must type “mint me some shit” into a Claude chat interface, and a relayer pays gas to execute the mint. Underpinned by EIP-7702 + MCP + V4 Hook.
- $HORN: Launched on May 8. An experiment in “time-as-currency”: tokens received = ETH deposited × holding duration. To mint rare NFTs, users must burn both a holding key and $HORN tokens—dual-burn required.
These assets differ in mechanism and narrative—but inspect any of their contracts, and you’ll find the same dependency line:
import {IHooks} from "@uniswap/v4-core/src/interfaces/IHooks.sol";
Yes—Uniswap V4 Hook.
Bitget Wallet Research will address four key questions in this article:
- What exactly is a Hook? It launched on mainnet on January 30, 2025—so why wasn’t it widely understood until May 2026? And why has it become a powerful new tool for asset issuance?
- How do top Hook-based assets differ in mechanism? What’s the fundamental distinction between them and the earlier ERC-404 / “token-NFT fusion” wave led by Pandora?
- What’s the next narrative truly lurking beneath the surface? Why might the current wave merely be an appetizer?
- From a cyclical perspective, how should ordinary users participate—and how should they avoid pitfalls?
I. Uniswap V4: A 16-Month-Cold Asset Issuance Engine
To understand why V4 Hooks suddenly ignited this wave of asset experimentation, we must first revisit a timeline rarely discussed in full.
1.1 A Long-Awaited Product Line
Many assume Uniswap V4 is a recent release. In fact, its whitepaper draft appeared as early as June 2023. The team originally aimed to launch shortly after Ethereum’s Dencun upgrade (March 2024), leveraging Transient Storage (EIP-1153) to implement Flash Accounting—the critical architectural innovation behind V4.
But V4 missed its original schedule.
The reason? Its security audit scope was unprecedented in DeFi history: nine independent third-party audits, the largest-ever security competition, and a $15.5M bug bounty pool. OpenZeppelin even identified a Critical-level vulnerability in commit d5d4957, forcing the team to rewrite portions of the codebase. Development slipped from Q3 2024 all the way to January 30, 2025—when V4 finally deployed on Ethereum mainnet, later expanding to Base, Arbitrum, Optimism, Polygon, BNB Chain, and 12 other EVM chains.
That means over 15 months elapsed between V4’s mainnet launch and the uPEG/SATO/Slonks surge. An upgrade repeatedly emphasized by the protocol itself remained dormant in its own backyard for more than a year—until this new wave of assets surfaced, thrusting V4 Hooks into the spotlight for the first time.
1.2 Uniswap V4’s Core Change: Opening the Logical Boundaries of Pools
To grasp what V4 changed, consider the evolution from V1 to V3.
In prior Uniswap versions, each liquidity pool was a standalone deployed contract—largely isolated from others. To launch a token, teams first deployed an ERC-20 contract, then created a pool on Uniswap with ETH and their token. Yet the pool’s core rules were beyond the project’s control: V2 used constant-product curves; V3 employed concentrated liquidity. Pricing and liquidity logic were hardcoded by Uniswap. Projects could adjust parameters—but couldn’t alter underlying rules.
Thus, from V1 to V3, token contracts and trading markets remained strictly separated: tokens handled issuance; Uniswap handled trading—with minimal programmable linkage. Teams could design tokenomics, but once inside a pool, assets operated under Uniswap’s pre-defined market logic.
V4’s changes focus on three layers:
- Singleton Architecture. Previously, each pool was a separate contract—costly to deploy and interact with. V4 consolidates all pools under a single PoolManager master contract. This slashes pool creation costs and enables unified handling of cross-pool interactions.
- Flash Accounting. In prior flows, funds often moved back and forth across pools. V4 instead records intermediate states first, settling only at the end. Put simply, it eliminates redundant transfers and settlements in complex trades—making multi-pool routing, cross-pool arbitrage, and composite market-making significantly more efficient.
- Hooks. Hooks are external logic modules attached to pools. Developers can inject custom rules at key points in the trade lifecycle—e.g., before pool initialization, before/after adding liquidity, before/after swaps, before/after removing liquidity. This is V4’s most profound departure: pools evolve from passive matchmakers into customizable market containers.
For example, a pool could enforce special trading rules during its initial listing phase; split fees among LPs, treasury, or auto-buybacks; or dynamically adjust fees based on volatility. Further, swaps themselves can trigger minting, burning, NFT generation, or point accrual. So while V4’s first two upgrades improve infrastructural efficiency, Hooks fundamentally redefine the boundaries of asset issuance and trading mechanisms—transforming Uniswap from a mere exchange into a platform for novel asset primitives.
1.3 From Lifecycle Hooks to Custom Pricing
The V4 whitepaper defines eight lifecycle insertion points:
beforeInitialize / afterInitialize
beforeAddLiquidity / afterAddLiquidity
beforeRemoveLiquidity / afterRemoveLiquidity
beforeSwap / afterSwap
Plus a set of donate hooks—over a dozen total. These aren’t just extra features; they expose the pool’s state machine to developers.
Even more significantly, V4 allows NoOp (No-Operation) Hooks paired with returnDelta. Developers can partially replace Uniswap’s native AMM math—defining their own pricing curves—and instruct PoolManager to settle using that logic. This transforms Uniswap V4 from a DEX into a development platform for financial primitives.
One crucial constraint: hook addresses are bound at pool initialization and permanently immutable thereafter. Once live, rules are locked. This underpins hook-based assets’ trustworthiness—and explains why SATO’s “whitepaper rewritten overnight” incident sparked controversy.
1.4 Why Didn’t It Catch Fire in 2025?
During V4’s launch week, market attention was consumed by the aftermath of Trump memecoins and AI assets like ai16z and Virtual. V4 lacked a strong trading catalyst; though developers tracked it closely, ordinary users felt little impact.
In the following months, the Uniswap Foundation’s Uniswap Hook Incubator (UHI) trained hundreds of Hook developers. By end-April 2026, Uniswap’s official GitHub hooklist repository listed 180 Hook projects—including Zora, Flaunch, and Clanker—designed around token launches and trading lifecycles. Yet these primarily serve launchpads, creators, or teams launching tokens. Ordinary users barely perceive the underlying Hooks. They solve “how to issue and manage assets more efficiently”—not “what new gameplay does V4 Hook unlock for retail?”
Then came uPEG at end-April 2026.
Infrastructure alone rarely spreads virally. What captures market attention is tradable, displayable, price-volatile assets. Of those 180 projects on hooklist, most are infra or launchpads; uPEG’s significance lies in being the first C-end consumable, tradable asset that lets ordinary users tangibly experience V4 Hooks’ capabilities.
Looking back over those 15 months, Hooks lacked neither tooling nor security—they lacked a marketable, discussable, tradable asset carrier. uPEG filled that role.
Yet dig deeper, and you’ll see V4 Hooks haven’t merely raised issuance efficiency—they’ve reset the bar for mechanism design. Over the past two cycles, token issuance grew increasingly standardized and templated—eventually becoming accessible to anyone, leading rapidly to homogenized supply. Hooks move in the opposite direction. They stop rewarding “who launched first,” and instead reward “who can encode price, behavior, liquidity, and time into a single coherent system.” In a sense, markets have never lacked issuance tools—what’s scarce is genius devs who can write mechanisms.
II. Four Hook Pathways: Side Effects, Pricing, Loops, and Entry Points
Understanding this Hook wave hinges on identifying which layer of the trade lifecycle the Hook intervenes in. Based on intervention point, current high-profile assets fall into four broad pathways: post-swap side effects, pricing logic takeover, NFT economic loops, and AI-triggered entry.
2.1 Side-Effect Trigger (afterSwap)
Representative projects: uPEG, $HORN
This approach is relatively conservative: AMM pricing remains unchanged; the Hook only fires additional actions after swap completion.
[user swaps ETH for uPEG] ↓ [V4 PoolManager prices via standard AMM] ↓ [afterSwap hook triggers] ↓ checks if position crosses integer threshold → if yes, calls SVG renderer to generate image and mint NFT → if crosses back, burns corresponding NFT
The challenge here lies in visual and on-chain rendering logic. Developers must build SVG renderers compact enough to fit within EVM gas limits—but pricing, liquidity, and slippage still follow Uniswap’s standard path. Thus, this is the easiest Hook type to integrate with existing assets.
2.2 Pricing Engine Takeover (beforeSwap + returnDelta)
- Representative project: $SATO
A more radical usage: the Hook intercepts swaps before they reach PoolManager, replacing AMM pricing with a custom curve.
[user swaps ETH for SATO] ↓ [beforeSwap hook intercepts] ↓ prices using hook’s built-in exponential bonding curve ↓ hook holds reserves; sell path burns tokens, transfers ETH from reserves to PoolManager, which routes it to seller ↓ [returnDelta tells PoolManager to skip native pricing]
Here, the Hook doesn’t just add side effects—it directly participates in pricing. The SATO price users see isn’t computed by a traditional AMM; it’s derived from the Hook’s internal bonding curve.
2.3 On-Chain NFT Economic Layer (Voiding & Revival)
- Representative project: Slonks / $SLOP
A more sophisticated design. Slonks doesn’t simply bind NFTs and tokens—it creates a bidirectional conversion system.
Users can split a Slonks NFT into $SLOP tokens—or burn $SLOP to redeem a Slonks NFT from the system. To sustain this loop, the Hook collects fees on $SLOP trades and uses them to buy back Slonks NFTs from secondary markets, replenishing system inventory.
The potential here extends beyond new projects. In theory, existing NFT collections could integrate similar Hook mechanisms externally—transforming static NFTs into dynamic economic systems with token liquidity and buyback logic. Legacy PFP projects may thus become ideal testbeds.
2.4 Account Abstraction + AI Entry
- Representative project: $SHIT
A combined experiment involving V4 Hooks, EIP-7702, and AI agents. $SHIT, launched May 9, was the first to fully execute this chain.
Strictly speaking, it’s not a novel Hook mechanism. Its novelty lies in extending Hook programmability beyond the contract layer to the user entry layer: users needn’t click frontend buttons or manually call contracts—instead, a single AI prompt triggers on-chain action.
Comparing these four pathways clarifies why Hook assets exhibit such divergent forms.
Some trigger additional minting upon trade; others rewrite pricing curves; others weave fees, NFT inventory, and token liquidity into self-sustaining loops; still others replace web UI buttons with AI chat interfaces as the transaction entry point.
Hook assets are no longer just “a token on a DEX.” They’re more like on-chain programs wrapped in asset shells: trading is merely the entry point; what’s truly bought, discussed, and propagated is the mechanism encoded in the Hook.
2.5 Hooks Refocus Competition on Mechanism Design
Viewing these Hook assets collectively reveals a clear shift: competition is moving away from “who tells better stories” and back toward “who writes better mechanisms.” In the last cycle, products like pump.fun reduced issuance barriers to near-zero—leading to explosive asset supply, rapid attention dilution, and intense competition over names, images, and virality. V4 Hooks do the opposite: they don’t lower barriers—they refocus competition squarely on mechanism design. Whoever crafts genuinely differentiated, behavior-driving, self-propagating market structures stands the best chance of breaking through.
This is why tokenomics has long been DeFi natives’ strongest suit. Elite developers don’t just build tokens—they engineer market devices that induce behavior, reallocate liquidity, and reshape holding patterns. Total supply, distribution, and vesting are merely surface-level; deeper layers involve incentivizing certain behaviors, penalizing others, determining where price discovery occurs, and forcing specific choices from specific users at specific times. Hooks consolidate these elements—previously scattered across tokens, frontends, and operations—back into the pool itself.
If last cycle’s scarcest resources were traffic and narrative, Hook’s resurgence makes something far older scarce again: genius developers. Because when issuance tools become ubiquitous, what ultimately determines an asset’s longevity and ceiling is precisely the hardest-to-replicate mechanism design.
III. Is Token-NFT Conversion a New Narrative? Does This Time Differ?
Many first react to uPEG’s mechanics with: “Isn’t this just the 2024 ERC-404/Pandora wave?” But the journey from ERC-721 to ERC-404 to V4 Hooks traces an evolution in asset standards and trading entry points.
3.1 Phase One (2017–2023): ERC-721
Each token has a unique ID—no economic layer, no mint/burn logic. All trading happens on secondary markets, with no feedback to the contract itself.
This phase lasted roughly five years—from CryptoPunks and BAYC to Azuki, Doodles, and Moonbirds. PFP teams monetized via royalties and community building; contracts remained largely static. Hence, when OpenSea and others stopped enforcing royalties, many NFT projects’ business models quickly eroded.
3.2 Phase Two (2024): ERC-404 / Pandora
On February 2, 2024, Pandora launched on Ethereum. Not a VC coin or team token, it opened at $230 and surged to $32,000 in six days—a weekly gain of 12,000%.
Mechanics:
- 10,000 total ERC-20 tokens, corresponding to 10,000 Replicant NFTs
- Holding one full token = owning one Replicant
- Buying your first token mints a new Replicant to you
- Selling (holding <1 token) burns that Replicant
- Selling and rebuying → remints, but ID and rarity reroll randomly—the famed “reroll” mechanic
Communities briefly engaged in repeated trading to refresh Replicant rarity, hoping to reroll rarer NFTs. Yet ERC-404 exposed two core flaws:
- It was never a formal EIP standard. Pandora embedded both ERC-20 and ERC-721 interfaces into one contract—achieving “token-NFT duality”—but this wasn’t a mature standard. Wallets, bridges, aggregators, and other infra struggled with recognition and interaction.
- Gas costs were prohibitively high. Every trade risked triggering ERC-721 mint/burn, pushing per-swap gas fees into the tens of dollars.
By late 2024, DN-404 emerged, attempting a more engineered solution: splitting ERC-20 and ERC-721 into separate contracts, syncing them via mirror relationships—reducing gas and improving compatibility.
By then, however, market enthusiasm for “token-NFT fusion” had visibly cooled. ERC-404’s high gas, compatibility issues, and excessive speculation left the concept branded as a short-lived hype cycle—not a lasting narrative.
3.3 Phase Three (2026): V4 Hook
ERC-404’s core problem was trying to toggle between two independent standards—ERC-20 and ERC-721. Though it achieved “token-NFT duality,” state management grew complex, and infra compatibility remained unstable.
V4 Hooks take a different approach: rather than inventing a new asset standard, they make the swap action itself a programmable entry point. Asset generation, destruction, pricing, and ancillary logic needn’t reside solely in the token contract—they can live in the pool’s Hook logic.
Thus, V4 Hooks differ from ERC-404 along three dimensions:
First: Are NFTs pre-minted or generated at trade time?
Pandora’s Replicants function more like pre-set assets: all 10,000 metadata sets were defined at launch; trades merely mint, burn, or reroll NFTs.
uPEG’s logic differs: its 24×24 pixel art isn’t pre-rendered. Upon purchase and afterSwap trigger, the Hook generates a random seed from user address and trade params, then renders an SVG image on-chain in real time.
Second: Where do images and metadata reside?
Pandora stores images/metadata on IPFS or external servers. While IPFS is censorship-resistant versus centralized hosting, it still depends on external file persistence.
uPEG pushes SVG rendering logic entirely on-chain. As long as Ethereum exists, images can be regenerated.
Slonks goes further: it stores a full 22.7 KB transformer model directly on Ethereum mainnet—weights split across nine parts, saved via SSTORE2 into multiple functionless contracts. Every mint or merge runs inference in EVM and generates SVG on the spot. V3-era pools couldn’t support such computation or generation.
Third: Where is the economic mechanism written?
In ERC-404 projects like Pandora, tokenomics live in the token contract; Uniswap pools merely provide trading venues.
In V4 Hook assets, economics live directly in the Hook. SATO’s supply cap and halt rule, SLOP’s NFT-token conversion logic, $HORN’s “ETH deposited × holding time” minting—all depend on Hook execution. Reading only the token contract reveals nothing about the true mechanism.
So ERC-404 stitched together “token” and “NFT” standards; V4 Hooks transform “trading” itself into the genesis event for asset creation and mechanism activation—shifting from token-as-asset to swap-as-genesis.
IV. The Next Wave: “Second Spring” for Legacy NFT Projects
If uPEG/SATO/Slonks/$HORN represent the first act of the Hook narrative, the next wave—underdiscussed but worth tracking—is whether legacy NFT projects can leverage V4 Hooks to retroactively add new economic layers.
Most legacy NFT projects remain pure ERC-721. Their contracts typically support only mint, transfer, and burn—lacking economic logic tied to trading behavior. As OpenSea and others weaken royalty enforcement, many rely solely on community ops, branding, and new narratives to sustain activity.
V4 Hooks offer an alternative: don’t alter existing NFT ownership or force holder migration—simply attach a new Hook economic layer externally, reconnecting legacy assets to trading behavior at the contract level.
This path isn’t without precedent. Slonks, uPEG, and SATO have already validated diverse Hook approaches on-chain. The real hurdle isn’t engineering—it’s economic model design, and whether teams acknowledge their old models need new asset mechanisms.
Yet adopting a Hook economic layer isn’t purely technical. It signals a cultural pivot—from “art collectible” to “financialized asset.” That’s no small shift—not every team will embrace it.
Different Hook paradigms also vary in suitability for legacy NFTs. uPEG’s “trade-triggered generation” demands rewriting visual logic—unsuitable for old projects. SATO’s “Hook-controlled pricing” fits new issuance, not retrofitting onto existing NFTs. Slonks’ NFT-inventory/token-liquidity/fee-buyback loop, however, may suit legacy PFPs well. $HORN’s time-integrated minting could also reward long-term holders.
This path becomes viable only when the first influential legacy NFT project commits to testing it. For Hook observers, tracking established PFPs with strong communities and brands—but yet to undergo mechanism upgrades—may prove more fruitful than chasing newly launched assets.
V. Will V4 Hooks Spark a New Cycle?
Over longer cycles, crypto history shows a recurring pattern: shifts in asset issuance methods often catalyze new trading cycles.
In 2017, ERC-20 + ICO lowered issuance from “launch a chain” to “write a contract”; in 2021, ERC-721 + OpenSea standardized NFT issuance/trading, birthing NFT Summer; in 2023, BRC-20 + Ordinals fused Bitcoin’s scarcity with inscriptions, creating new secondary markets; in 2024, pump.fun dropped issuance from “code a contract” to “type a name.”
All prior shifts shared one trait: continuously lowering issuance barriers—making token creation simpler, participation easier, and supply ever more inflated.
V4 Hooks chart a different course. They raise developer barriers—not lower them—while unlocking vastly richer mechanism expression. They liberate tokenomics from static contracts, making the pool itself part of the asset mechanism.
In a sense, this is Uniswap’s response to pump.fun siphoning issuance traffic. Rather than compete on simplicity, it reframes the question: “Who can craft more creative, harder-to-copy asset mechanisms?”
Hooks won’t single-handedly ignite a bull market. They’re heavy, high-barrier, and demand elite developer skills—unlike pump.fun, they won’t spread to mass retail overnight.
But they could define the next cycle’s most mechanism-rich vertical—serving not the largest audience, but those willing to study contracts, dissect mechanisms, and shoulder early-stage risk.
VI. What Should Ordinary Users Watch For?
For ordinary users, engaging with Hook assets demands a mindset shift: in the V4 era, the real mechanism may reside in the Hook contract—not the token contract.
Previously, evaluating a new token focused on transfer taxes, blacklists, and mint permissions. With Hook assets, minting, burning, pricing curves, fee splits, NFT generation—even self-destruct logic—may all hide in Hook code. Reading only the token contract likely misses true risks.
SATO exemplifies this. Buy/sell paths diverge, compounded by dual-direction taxes. Users relying on standard AMM intuition easily underestimate mechanism drag.
Thus, participating in Hook assets requires attention to several things: First, always review the Hook contract—not just the token contract. Second, verify whether buy/sell operate on dual-pricing tracks. Third, size positions relative to pool liquidity—early pools are thin; a modest sell order can cause sharp price impact. Fourth, don’t conflate technical innovation with market fairness: Hooks expand developer expressivity, but won’t eliminate rug pulls or hidden traps.
VII. Conclusion
Returning to our opening question: Why V4 Hooks? Why now?
V4 Hooks launched in January 2025. They had tooling, security audits, incubators training developers, and a registry of 180 Hook projects. Yet they failed to spark market excitement. The reason is simple: most users were still immersed in pump.fun’s low-barrier issuance logic. If you can launch a token in seconds, why spend weeks writing Hooks?
But as Solana memecoins grew increasingly saturated—and low-barrier issuance bred rampant homogeneity—spending weeks writing Hooks began regaining meaning. Higher engineering barriers became intrinsic to mechanism scarcity itself.
This forms a fascinating loop: pump.fun crushed issuance barriers, fueling rapid memecoin expansion; oversupply then drove some players to seek harder-to-replicate, mechanism-scarce assets; and the market rediscovered V4 Hooks—cold for 16 months on EVM chains.
New market opportunities rarely emerge amid peak hype—but rather before mainstream attention shifts and unified narratives crystallize, bubbling up first from foundational code. V4 Hooks waited 16 months for their first true market-facing assets. uPEG was the earliest widely discussed case; Slonks demonstrated on-chain generation and NFT-economic loops; SATO pushed Hook-driven pricing to its extreme; SHIT fused AI entry, EIP-7702, and Hooks; $HORN began encoding time directly into asset genesis.
Yet these may not mark the endpoint. If V4 Hooks advance further, the next wave may extend beyond new memes or generative art—to legacy NFT projects, on-chain game assets, or even AI agent trading interfaces. Whether any legacy PFP team initiates Hook integration remains to be seen.
What’s undeniable is that V4 Hooks are evolving from developer experiments into the market’s gateway for novel asset mechanisms. They haven’t raised issuance efficiency—they’ve raised the bar for mechanism design. Markets aren’t short on assets; they’re short on genius devs who can write mechanisms. Whoever successfully integrates price, behavior, liquidity, and time into a working system will likely define the next phase of this narrative.
Note: This article is for research and informational purposes only and does not constitute investment advice. Prices of Hook-related assets mentioned herein are highly volatile; please thoroughly assess your own risk tolerance before participation.
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