# Uniswap v4 Exploring New Possibilities I Dayitva Goel and Angela Ocando

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-07
- Duration: 20:57
- Topics: Uniswap v4, hooks, singleton architecture, dynamic fees, continuous fee spectrum, ERC-6909, flash accounting, beforeSwap, afterSwap, add/remove liquidity, donations, fee updates, TBAP/TWAP execution, stable-stable efficiency, Pendle-style AMM, World ID pools, KYC/AML, sybil resistance, lottery pools, social yield, smart borrow, rehypothecation, RWA issuance, L2 best price, mid-size trade incentives, Foundry, Anvil fork, Hook Template, counter hook, create pool, add liquidity
- Watch: https://streameth.org/watch/yt-myxGCAmd37k
- YouTube: https://www.youtube.com/watch?v=myxGCAmd37k

## Description

Deep dive into Uniswap v4 and how hooks let you customize the entire swap lifecycle. Angela Ocando introduces v4 upgrades—singleton architecture, continuous/dynamic fees, ERC-6909 + flash accounting—and explains pre/post-swap hooks. Dayitva Goel outlines concrete hook ideas (from stable-stable execution and TBAP to RWA/KYC pools and rehypothecation). A hands-on demo shows the official v4 Hook Template: writing a simple counter hook, testing with Foundry, forking, deploying a hook, creating tokens, spinning up a pool, adding liquidity, and executing a swap.

00:02 Why v4 now: customize DeFi around the swap
00:33 Hooks = pre/post-swap custom logic (whitelists, loyalty, RWA, LP UX)
01:31 Uniswap Foundation pillars & role
01:56 Protocol recap: LPs ↔ traders; censorship-resistant, self-custody
03:13 What’s new in v4: singleton, dynamic fees, ERC-6909, flash accounting
04:38 Hooks overview: 1 hook per pool; 14 hook functions available
05:02 v3 routing vs v4 singleton + flash accounting (one tx)
06:00 Where hooks run: before/after swap, add/remove liquidity, fees, donate
07:25 Hook lifecycle flags (before/after) & flow
07:48 Hack ideas: large stable-stable, TBAP execution, Pendle-style AMM
09:15 World ID–verified/KYC pools; sybil resistance & UX
10:01 No-loss lottery pools with social yield (Pull-Together-style)
10:20 Smart borrow: rehypothecate out-of-range liquidity
10:38 RWA primary issuance hooks + compliance (ARC-standards)
11:09 L2 sub-$5k ETH-USDC best-price hooks; mid-size trade incentives
12:20 Resources: Hook Directory (Atrium), Hacker Toolkit
13:01 v4 Hook Template intro (GitHub)
13:54 Setup: clone, Foundry update, forge test
14:16 Scripts tour: deploy, create pool, liquidity helpers
14:37 Example hook: counter.sol (before/after swap & liquidity)
15:22 Writing tests: deploy hook, add liquidity, assert counters
16:12 Anvil fork (Uni Sepolia) for local testing
16:43 Deploy the hook (forge script) → get hook address
17:11 Configure base script with hook address
17:57 Create mock tokens & mint balances
18:38 Create pool + add liquidity (multicall actions)
20:09 Execute a swap via router; pool key params in v4
20:26 Wrap-up: template = fastest path to production hooks

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🇮🇳 *ETHGlobal New Delhi*
This workshop is specifically for ETHGlobal New Delhi, a 3-day hackathon held September 19-21 at the India International Convention & Expo Centre, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem! Watch the full ETHGlobal New Delhi 2025 playlist here: https://www.youtube.com/playlist?list=PLXzKMXK2aHh7zCFW3hBqatZ18rQaYeEJL
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