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router.md

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Router contract

!!! note "" Router contract is maintained in router{target="_blank"} branch of defi-sdk repo.

Main features

  • Trade any ERC20 token
  • Two types of amounts: absolute (usual amount) and relative (percentage of balance)
  • Three types of permit() functions for approving tokens in the same transaction (EIP2612, DAI-like, Yearn-like)
  • Two types of swaps: with fixed input amount or fixed output amount
  • Two types of fees:
    • protocol fee managed by the Router contract owner with possibility of one-time discounts requiring signature of an address with the special role
    • marketplace fee managed by the transaction creator
  • Relayed transactions requiring just an EIP712 signature of the user

Usage

We highly recommend using our Transaction Builder API{target="_blank"}. It automatically uses Router contract on L2 chains. Using Router contract on Ethereum is not encouraged as it has a huge gas overhead.