defi-uniswap-v4

This repository houses course resources and discussions for the course.

Please refer to this for an in-depth explanation of the content:

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Course intro

• Course intro
• Setup

Overview

• V4 vs V3
• Repositories

Pool manager

• Currency
• Pool key and pool id
  • PoolKey
  • PoolId
  • Example
  • Dune - How to get PoolKey from PoolId
• Lock
  • Lock
  • unlock
  • NonzeroDeltaCount
• Transient storage
  • NonzeroDeltaCount
  • _accountDelta
  • Account delta
• Currency reserves
• Swap contract calls
  • BalanceDelta
  • Exercise - flash loan
  • Exercise - swap
• Reading data
  • extsload
  • exttload
  • StateLibrary
    • StateView
  • TransientStateLibrary
    • DeltaResolver
  • Exercise - get currency delta
• Application - swap router

Hooks

• Key concepts
  • External contract calls before and after pool operations such as swap and liquidity modifications
    • PoolManager
    • IHooks
    • Hooks
  • Hooks are part of the derivation for PoolId
• How are hook flags encoded into the hooks address?
  • Bottom 14 bits
    • Flags
    • hasPermission
  • HookMiner
    • FindHookSalt.sol
• Access msg.sender inside a hooks contract
• Exercise - counter hook
• Application - limit order
  • What is a limit order
  • Review ticks and liquidity
  • Algorithm

Position Manager

• Key concepts
  • PositionManager
  • Entry point
    • modifyLiquidities
    • BaseActionsRouter
    • Actions
  • Mint, burn, increase / decrease liquidity and collect fees
    • V4Resolver
  • permit2
    • permit2
    • Permit2Forwarder.sol
    • Multicall_v4
• Exercise - position manager
  • Subscriber
    • Notifier
• Exercise - subscriber
• Application - reposition liquidity

Universal Router

• UniversalRouter
• How it works
  • execute
  • dispatch
  • Commands
    • Examples - Permit2 and non-reverting command
  • Commands and inputs
  • V4SwapRouter
  • IV4Router
• UniversalRouter and Permit2
  • V4SwapRouter
  • DeltaResolver
  • payOrPermit2Transfer
• Exercise - execute UniversalRouter commands
• V3 to V4 Multi hop swap
• Exercise - Multi hop swap on V3 and then V4
• Exercise - Quoter
• Application - liquidation

Resources

• Uniswap V4
• Uniswap V4 pools
• Uniswap V4 docs
• GitHub - v4-core
• GitHub - v4-periphery
• GitHub - universal-router
• GitHub - v4-template
• GitHub - permit2
• GitHub - mixed-quoter
• YouTube - Uniswap v4 on Unichain
• Cyfrin - Uniswap V4 Swap: Deep Dive Into Execution and Accounting
• PoolManager - storage layout
• Dune - How to get PoolKey from PoolId
• Uniswap v4 by Example
• Bunni
• Damian Rusinek - Secrets of Uniswap V4: A Deep Dive into Hooks Security
• BaseHook
• LimitOrder
• Permit2
• How to swap from V3 to V4 using UniversalRouter