// SPDX-License-Identifier: GPL-2.0-only// Copyright 2020 Spilsbury Holdings Ltdpragma solidity >=0.6.6 <0.8.0;pragma experimental ABIEncoderV2;import { Types } from "../Types.sol";interface IDefiBridge { /** * Input cases: * Case1: 1 real input. * Case2: 1 virtual asset input. * Case3: 1 real 1 virtual input. * * Output cases: * Case1: 1 real * Case2: 2 real * Case3: 1 real 1 virtual * Case4: 1 virtual * * Example use cases with asset mappings * 1 1: Swapping. * 1 2: Swapping with incentives (2nd output reward token). * 1 3: Borrowing. Lock up collateral, get back loan asset and virtual position asset. * 1 4: Opening lending position OR Purchasing NFT. Input real asset, get back virtual asset representing NFT or position. * 2 1: Selling NFT. Input the virtual asset, get back a real asset. * 2 2: Closing a lending position. Get back original asset and reward asset. * 2 3: Claiming fees from an open position. * 2 4: Voting on a 1 4 case. * 3 1: Repaying a borrow. Return loan plus interest. Get collateral back. * 3 2: Repaying a borrow. Return loan plus interest. Get collateral plus reward token. (AAVE) * 3 3: Partial loan repayment. * 3 4: DAO voting stuff. */ /* @dev This function is called from the RollupProcessor.sol contract via the DefiBridgeProxy. It receives the aggregate sum of all users funds for the input assets. @param AztecAsset inputAssetA a struct detailing the first input asset, this will always be set @param AztecAsset inputAssetB an optional struct detailing the second input asset, this is used for repaying borrows and should be virtual @param AztecAsset outputAssetA a struct detailing the first output asset, this will always be set @param AztecAsset outputAssetB a struct detailing an optional second output asset @param uint256 inputValue, the total amount input, if there are two input assets, equal amounts of both assets will have been input @param uint256 interactionNonce a globally unique identifier for this DeFi interaction. This is used as the assetId if one of the output assets is virtual @param uint64 auxData other data to be passed into the bridge contract (slippage / nftID etc) @return uint256 outputValueA the amount of outputAssetA returned from this interaction, should be 0 if async @return uint256 outputValueB the amount of outputAssetB returned from this interaction, should be 0 if async or bridge only returns 1 asset. @return bool isAsync a flag to toggle if this bridge interaction will return assets at a later date after some third party contract has interacted with it via finalise() */ function convert( Types.AztecAsset calldata inputAssetA, Types.AztecAsset calldata inputAssetB, Types.AztecAsset calldata outputAssetA, Types.AztecAsset calldata outputAssetB, uint256 inputValue, uint256 interactionNonce, uint64 auxData ) external payable returns ( uint256 outputValueA, uint256 outputValueB, bool isAsync ); /* @dev This function is called from the RollupProcessor.sol contract via the DefiBridgeProxy. It receives the aggreagte sum of all users funds for the input assets. @param AztecAsset inputAssetA a struct detailing the first input asset, this will always be set @param AztecAsset inputAssetB an optional struct detailing the second input asset, this is used for repaying borrows and should be virtual @param AztecAsset outputAssetA a struct detailing the first output asset, this will always be set @param AztecAsset outputAssetB a struct detailing an optional second output asset @param uint256 interactionNonce @param uint64 auxData other data to be passed into the bridge contract (slippage / nftID etc) @return uint256 outputValueA the return value of output asset A @return uint256 outputValueB optional return value of output asset B @dev this function should have a modifier on it to ensure it can only be called by the Rollup Contract */ function finalise( Types.AztecAsset calldata inputAssetA, Types.AztecAsset calldata inputAssetB, Types.AztecAsset calldata outputAssetA, Types.AztecAsset calldata outputAssetB, uint256 interactionNonce, uint64 auxData ) external payable returns (uint256 outputValueA, uint256 outputValueB, bool interactionComplete);}
