Swap Interface

swap.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.4;

import "./interfaces/ITransactionManager.sol";

contract CrossChain {
  private immutable ITransactionManager transactionManager;
  
  enum SwapType { ONE_INCH, PARASWAP, SUSHI }

  constructor() public {
    transactionManager = ITransactionManager(0x80623b8534d855479Ff4621caBE65d451A81BDFe); // from deployments.json
  }

  function startTransfer(
    address user,
    InvariantTransactionData calldata invariantData, // contains swap info such as assets, router, chains
    uint256 expiry,
    bytes calldata encryptedCallData, // optional calldata
    bytes calldata encodedBid, // bid from router
    bytes calldata bidSignature, // router's sig on bid
    SwapType swapType,
    bytes calldata swapCallData
  ) 
    public returns (TransactionData memory) 
  {
    // ...
    // do some stuff
    // ...

    return transactionManager.prepare(
      invariantData,
      amount,
      expiry,
      encryptedCallData,
      encodedBid,
      bidSignature
    )
  }
  
  function completeTransfer(
    SwapType swapType,
    bytes calldata swapCallData
  )
}