Swapper

Enables swapping between an xPYT/NYT and its underlying asset by swapping via an external DEX and minting/burning xPYT/NYT.

Architecture

• Swapper.sol: Abstract contract for swapping between xPYTs/NYTs and their underlying asset by swapping via an external DEX and minting/burning xPYT/NYT.
• uniswap-v3/: Uniswap V3 support
  • UniswapV3Swapper.sol: Swapper that uses Uniswap V3 to swap between xPYTs/NYTs
  • UniswapV3Juggler.sol: Given xPYT/NYT input, computes how much to swap to result in an equal amount of PYT & NYT.
  • lib/: Libraries used
    • PoolAddress.sol: Provides functions for deriving a Uniswap V3 pool address from the factory, tokens, and the fee
• curve-v2/: Curve V2 support
  • CurveV2Swapper.sol: Swapper that uses Curve V2 to swap between xPYTs/NYTs
  • CurveV2Juggler.sol: Given xPYT/NYT input, computes how much to swap to result in an equal amount of PYT & NYT.
• lib/: Helpful libraries
  • ApproveMaxIfNeeded.sol: Gives max ERC20 approval to the spender if the current allowance is insufficient.

Installation

To install with DappTools:

dapp install timeless-fi/swapper

To install with Foundry:

forge install timeless-fi/swapper

Local development

This project uses Foundry as the development framework.

Dependencies

make install

Compilation

make build

Testing

make test