mirror of
https://github.com/Instadapp/dsa-connectors.git
synced 2024-07-29 22:37:00 +00:00
feat: add aave permit connector
This commit is contained in:
Shriya Tyagi
parent
a0ef584bd5
commit
57a4db1239
25
contracts/base/connectors/aave/v3-import-permit/events.sol
Normal file
25
contracts/base/connectors/aave/v3-import-permit/events.sol
Normal file
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@ -0,0 +1,25 @@
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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pragma experimental ABIEncoderV2;
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contract Events {
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event LogAaveV3ImportWithPermit(
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address indexed user,
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address[] atokens,
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string[] supplyIds,
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string[] borrowIds,
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uint256[] flashLoanFees,
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uint256[] supplyAmts,
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uint256[] borrowAmts
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);
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event LogAaveV3ImportWithPermitAndCollateral(
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address indexed user,
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address[] atokens,
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string[] supplyIds,
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string[] borrowIds,
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uint256[] flashLoanFees,
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uint256[] supplyAmts,
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uint256[] borrowAmts,
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bool[] enableCollateral
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);
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}
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344
contracts/base/connectors/aave/v3-import-permit/helpers.sol
Normal file
344
contracts/base/connectors/aave/v3-import-permit/helpers.sol
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@ -0,0 +1,344 @@
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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import { DSMath } from "../../../common/math.sol";
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import { Basic } from "../../../common/basic.sol";
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import { TokenInterface, AccountInterface } from "../../../common/interfaces.sol";
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import { AaveInterface, AavePoolProviderInterface, AaveDataProviderInterface } from "./interface.sol";
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import "./events.sol";
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import "./interface.sol";
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abstract contract Helper is DSMath, Basic {
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/**
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* @dev Aave referal code
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*/
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uint16 internal constant referalCode = 3228;
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/**
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* @dev Aave Lending Pool Provider
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*/
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AavePoolProviderInterface internal constant aaveProvider =
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AavePoolProviderInterface(0xe20fCBdBfFC4Dd138cE8b2E6FBb6CB49777ad64D);
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/**
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* @dev Aave Protocol Data Provider
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*/
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AaveDataProviderInterface internal constant aaveData =
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AaveDataProviderInterface(0x2d8A3C5677189723C4cB8873CfC9C8976FDF38Ac);
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function getIsColl(address token, address user)
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internal
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view
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returns (bool isCol)
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{
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(, , , , , , , , isCol) = aaveData.getUserReserveData(token, user);
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}
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struct ImportData {
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address[] _supplyTokens;
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address[] _borrowTokens;
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ATokenInterface[] aTokens;
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uint256[] supplyAmts;
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uint256[] variableBorrowAmts;
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uint256[] variableBorrowAmtsWithFee;
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uint256[] stableBorrowAmts;
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uint256[] stableBorrowAmtsWithFee;
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uint256[] totalBorrowAmts;
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uint256[] totalBorrowAmtsWithFee;
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bool convertStable;
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}
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struct ImportInputData {
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address[] supplyTokens;
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address[] borrowTokens;
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bool convertStable;
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uint256[] flashLoanFees;
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}
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struct SignedPermits {
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uint8[] v;
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bytes32[] r;
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bytes32[] s;
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uint256[] expiry;
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}
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}
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contract AaveHelpers is Helper {
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function getBorrowAmount(address _token, address userAccount)
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internal
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view
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returns (uint256 stableBorrow, uint256 variableBorrow)
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{
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(
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,
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address stableDebtTokenAddress,
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address variableDebtTokenAddress
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) = aaveData.getReserveTokensAddresses(_token);
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stableBorrow = ATokenInterface(stableDebtTokenAddress).balanceOf(
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userAccount
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);
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variableBorrow = ATokenInterface(variableDebtTokenAddress).balanceOf(
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userAccount
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);
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}
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function getBorrowAmounts(
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address userAccount,
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AaveInterface aave,
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ImportInputData memory inputData,
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ImportData memory data
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) internal returns (ImportData memory) {
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if (inputData.borrowTokens.length > 0) {
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data._borrowTokens = new address[](inputData.borrowTokens.length);
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data.variableBorrowAmts = new uint256[](
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inputData.borrowTokens.length
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);
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data.variableBorrowAmtsWithFee = new uint256[](
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inputData.borrowTokens.length
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);
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data.stableBorrowAmts = new uint256[](
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inputData.borrowTokens.length
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);
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data.stableBorrowAmtsWithFee = new uint256[](
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inputData.borrowTokens.length
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);
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data.totalBorrowAmts = new uint256[](inputData.borrowTokens.length);
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data.totalBorrowAmtsWithFee = new uint256[](
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inputData.borrowTokens.length
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);
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for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
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for (uint256 j = i; j < inputData.borrowTokens.length; j++) {
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if (j != i) {
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require(
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inputData.borrowTokens[i] !=
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inputData.borrowTokens[j],
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"token-repeated"
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);
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}
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}
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}
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for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
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address _token = inputData.borrowTokens[i] == ethAddr
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? wethAddr
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: inputData.borrowTokens[i];
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data._borrowTokens[i] = _token;
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(
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data.stableBorrowAmts[i],
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data.variableBorrowAmts[i]
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) = getBorrowAmount(_token, userAccount);
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if (data.variableBorrowAmts[i] != 0) {
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data.variableBorrowAmtsWithFee[i] = add(
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data.variableBorrowAmts[i],
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inputData.flashLoanFees[i]
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);
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data.stableBorrowAmtsWithFee[i] = data.stableBorrowAmts[i];
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} else {
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data.stableBorrowAmtsWithFee[i] = add(
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data.stableBorrowAmts[i],
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inputData.flashLoanFees[i]
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);
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}
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data.totalBorrowAmts[i] = add(
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data.stableBorrowAmts[i],
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data.variableBorrowAmts[i]
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);
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data.totalBorrowAmtsWithFee[i] = add(
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data.stableBorrowAmtsWithFee[i],
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data.variableBorrowAmtsWithFee[i]
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);
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if (data.totalBorrowAmts[i] > 0) {
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uint256 _amt = data.totalBorrowAmts[i];
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TokenInterface(_token).approve(address(aave), _amt);
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}
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}
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}
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return data;
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}
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function getSupplyAmounts(
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address userAccount,
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ImportInputData memory inputData,
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ImportData memory data
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) internal view returns (ImportData memory) {
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data.supplyAmts = new uint256[](inputData.supplyTokens.length);
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data._supplyTokens = new address[](inputData.supplyTokens.length);
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data.aTokens = new ATokenInterface[](inputData.supplyTokens.length);
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for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
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for (uint256 j = i; j < inputData.supplyTokens.length; j++) {
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if (j != i) {
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require(
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inputData.supplyTokens[i] != inputData.supplyTokens[j],
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"token-repeated"
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);
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}
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}
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}
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for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
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address _token = inputData.supplyTokens[i] == ethAddr
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? wethAddr
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: inputData.supplyTokens[i];
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(address _aToken, , ) = aaveData.getReserveTokensAddresses(_token);
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data._supplyTokens[i] = _token;
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data.aTokens[i] = ATokenInterface(_aToken);
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data.supplyAmts[i] = data.aTokens[i].balanceOf(userAccount);
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}
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return data;
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}
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function _paybackBehalfOne(
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AaveInterface aave,
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address token,
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uint256 amt,
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uint256 rateMode,
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address user
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) private {
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aave.repay(token, amt, rateMode, user);
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}
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function _PaybackStable(
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uint256 _length,
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AaveInterface aave,
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address[] memory tokens,
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uint256[] memory amts,
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address user
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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_paybackBehalfOne(aave, tokens[i], amts[i], 1, user);
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}
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}
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}
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function _PaybackVariable(
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uint256 _length,
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AaveInterface aave,
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address[] memory tokens,
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uint256[] memory amts,
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address user
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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_paybackBehalfOne(aave, tokens[i], amts[i], 2, user);
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}
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}
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}
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function _PermitATokens(
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address userAccount,
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ATokenInterface[] memory aTokenContracts,
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address[] memory tokens,
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uint8[] memory v,
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bytes32[] memory r,
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bytes32[] memory s,
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uint256[] memory expiry
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) internal {
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for (uint256 i = 0; i < tokens.length; i++) {
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aTokenContracts[i].permit(
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userAccount,
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address(this),
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uint256(-1),
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expiry[i],
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v[i],
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r[i],
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s[i]
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);
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}
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}
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function _TransferAtokens(
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uint256 _length,
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AaveInterface aave,
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ATokenInterface[] memory atokenContracts,
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uint256[] memory amts,
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address[] memory tokens,
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address userAccount
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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uint256 _amt = amts[i];
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require(
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atokenContracts[i].transferFrom(
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userAccount,
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address(this),
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_amt
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),
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"allowance?"
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);
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if (!getIsColl(tokens[i], address(this))) {
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aave.setUserUseReserveAsCollateral(tokens[i], true);
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}
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}
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}
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}
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function _TransferAtokensWithCollateral(
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uint256 _length,
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AaveInterface aave,
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ATokenInterface[] memory atokenContracts,
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uint256[] memory amts,
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address[] memory tokens,
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bool[] memory colEnable,
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address userAccount
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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uint256 _amt = amts[i];
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require(
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atokenContracts[i].transferFrom(
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userAccount,
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address(this),
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_amt
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),
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"allowance?"
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);
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if (!getIsColl(tokens[i], address(this))) {
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aave.setUserUseReserveAsCollateral(tokens[i], colEnable[i]);
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}
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}
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}
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}
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function _BorrowVariable(
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uint256 _length,
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AaveInterface aave,
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address[] memory tokens,
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uint256[] memory amts
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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_borrowOne(aave, tokens[i], amts[i], 2);
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}
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}
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}
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function _BorrowStable(
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uint256 _length,
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AaveInterface aave,
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address[] memory tokens,
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uint256[] memory amts
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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_borrowOne(aave, tokens[i], amts[i], 1);
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}
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}
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}
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function _borrowOne(
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AaveInterface aave,
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address token,
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uint256 amt,
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uint256 rateMode
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) private {
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aave.borrow(token, amt, rateMode, referalCode, address(this));
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}
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}
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117
contracts/base/connectors/aave/v3-import-permit/interface.sol
Normal file
117
contracts/base/connectors/aave/v3-import-permit/interface.sol
Normal file
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@ -0,0 +1,117 @@
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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interface AaveInterface {
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function supply(
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address asset,
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uint256 amount,
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address onBehalfOf,
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uint16 referralCode
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) external;
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function withdraw(
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address _asset,
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uint256 _amount,
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address _to
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) external;
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function borrow(
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address _asset,
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uint256 _amount,
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uint256 _interestRateMode,
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uint16 _referralCode,
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address _onBehalfOf
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) external;
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function repay(
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address _asset,
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uint256 _amount,
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uint256 _rateMode,
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address _onBehalfOf
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) external;
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function setUserUseReserveAsCollateral(
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address _asset,
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bool _useAsCollateral
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) external;
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function swapBorrowRateMode(address _asset, uint256 _rateMode) external;
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function getUserAccountData(address user)
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external
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view
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returns (
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uint256 totalCollateralBase,
|
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uint256 totalDebtBase,
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uint256 availableBorrowsBase,
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uint256 currentLiquidationThreshold,
|
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uint256 ltv,
|
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uint256 healthFactor
|
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);
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}
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interface ATokenInterface {
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function scaledBalanceOf(address _user) external view returns (uint256);
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|
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function isTransferAllowed(address _user, uint256 _amount)
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external
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view
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returns (bool);
|
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function balanceOf(address _user) external view returns (uint256);
|
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|
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function permit(
|
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address owner,
|
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address spender,
|
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uint256 value,
|
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uint256 deadline,
|
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uint8 v,
|
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bytes32 r,
|
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bytes32 s
|
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) external;
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function transferFrom(
|
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address,
|
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address,
|
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uint256
|
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) external returns (bool);
|
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|
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function allowance(address, address) external returns (uint256);
|
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}
|
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|
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interface AavePoolProviderInterface {
|
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function getPool() external view returns (address);
|
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}
|
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|
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interface AaveDataProviderInterface {
|
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function getReserveTokensAddresses(address _asset)
|
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external
|
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view
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returns (
|
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address aTokenAddress,
|
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address stableDebtTokenAddress,
|
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address variableDebtTokenAddress
|
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);
|
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|
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function getUserReserveData(address _asset, address _user)
|
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external
|
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view
|
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returns (
|
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uint256 currentATokenBalance,
|
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uint256 currentStableDebt,
|
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uint256 currentVariableDebt,
|
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uint256 principalStableDebt,
|
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uint256 scaledVariableDebt,
|
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uint256 stableBorrowRate,
|
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uint256 liquidityRate,
|
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uint40 stableRateLastUpdated,
|
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bool usageAsCollateralEnabled
|
||||
);
|
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}
|
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|
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interface AaveAddressProviderRegistryInterface {
|
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function getAddressesProvidersList()
|
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external
|
||||
view
|
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returns (address[] memory);
|
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}
|
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258
contracts/base/connectors/aave/v3-import-permit/main.sol
Normal file
258
contracts/base/connectors/aave/v3-import-permit/main.sol
Normal file
|
|
@ -0,0 +1,258 @@
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//SPDX-License-Identifier: MIT
|
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pragma solidity ^0.7.0;
|
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pragma experimental ABIEncoderV2;
|
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/**
|
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* @title Aave v3 import connector.
|
||||
* @dev Import EOA's aave V3 position to DSA's aave v3 position
|
||||
*/
|
||||
|
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import { TokenInterface, AccountInterface } from "../../../common/interfaces.sol";
|
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import { AaveInterface, ATokenInterface } from "./interface.sol";
|
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import "./helpers.sol";
|
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import "./events.sol";
|
||||
|
||||
contract AaveV3ImportPermitResolver is AaveHelpers {
|
||||
function _importAave(
|
||||
address userAccount,
|
||||
ImportInputData memory inputData,
|
||||
SignedPermits memory permitData
|
||||
) internal returns (string memory _eventName, bytes memory _eventParam) {
|
||||
require(
|
||||
AccountInterface(address(this)).isAuth(userAccount),
|
||||
"user-account-not-auth"
|
||||
);
|
||||
|
||||
require(inputData.supplyTokens.length > 0, "0-length-not-allowed");
|
||||
|
||||
ImportData memory data;
|
||||
|
||||
AaveInterface aave = AaveInterface(aaveProvider.getPool());
|
||||
|
||||
data = getBorrowAmounts(userAccount, aave, inputData, data);
|
||||
data = getSupplyAmounts(userAccount, inputData, data);
|
||||
|
||||
// payback borrowed amount;
|
||||
_PaybackStable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.stableBorrowAmts,
|
||||
userAccount
|
||||
);
|
||||
_PaybackVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.variableBorrowAmts,
|
||||
userAccount
|
||||
);
|
||||
|
||||
//permit this address to transfer aTokens
|
||||
_PermitATokens(
|
||||
userAccount,
|
||||
data.aTokens,
|
||||
data._supplyTokens,
|
||||
permitData.v,
|
||||
permitData.r,
|
||||
permitData.s,
|
||||
permitData.expiry
|
||||
);
|
||||
|
||||
// transfer atokens to this address;
|
||||
_TransferAtokens(
|
||||
data._supplyTokens.length,
|
||||
aave,
|
||||
data.aTokens,
|
||||
data.supplyAmts,
|
||||
data._supplyTokens,
|
||||
userAccount
|
||||
);
|
||||
|
||||
// borrow assets after migrating position
|
||||
if (data.convertStable) {
|
||||
_BorrowVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.totalBorrowAmtsWithFee
|
||||
);
|
||||
} else {
|
||||
_BorrowStable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.stableBorrowAmtsWithFee
|
||||
);
|
||||
_BorrowVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.variableBorrowAmtsWithFee
|
||||
);
|
||||
}
|
||||
|
||||
_eventName = "LogAaveV3ImportWithPermit(address,bool,address[],address[],uint256[],uint256[],uint256[],uint256[])";
|
||||
_eventParam = abi.encode(
|
||||
userAccount,
|
||||
inputData.convertStable,
|
||||
inputData.supplyTokens,
|
||||
inputData.borrowTokens,
|
||||
inputData.flashLoanFees,
|
||||
data.supplyAmts,
|
||||
data.stableBorrowAmts,
|
||||
data.variableBorrowAmts
|
||||
);
|
||||
}
|
||||
|
||||
function _importAaveWithCollateral(
|
||||
address userAccount,
|
||||
ImportInputData memory inputData,
|
||||
SignedPermits memory permitData,
|
||||
bool[] memory enableCollateral
|
||||
) internal returns (string memory _eventName, bytes memory _eventParam) {
|
||||
require(
|
||||
AccountInterface(address(this)).isAuth(userAccount),
|
||||
"user-account-not-auth"
|
||||
);
|
||||
|
||||
require(inputData.supplyTokens.length > 0, "0-length-not-allowed");
|
||||
require(
|
||||
enableCollateral.length == inputData.supplyTokens.length,
|
||||
"supplytokens-enableCol-len-not-same"
|
||||
);
|
||||
|
||||
ImportData memory data;
|
||||
|
||||
AaveInterface aave = AaveInterface(aaveProvider.getPool());
|
||||
|
||||
data = getBorrowAmounts(userAccount, aave, inputData, data);
|
||||
data = getSupplyAmounts(userAccount, inputData, data);
|
||||
|
||||
// payback borrowed amount;
|
||||
_PaybackStable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.stableBorrowAmts,
|
||||
userAccount
|
||||
);
|
||||
_PaybackVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.variableBorrowAmts,
|
||||
userAccount
|
||||
);
|
||||
|
||||
//permit this address to transfer aTokens
|
||||
_PermitATokens(
|
||||
userAccount,
|
||||
data.aTokens,
|
||||
data._supplyTokens,
|
||||
permitData.v,
|
||||
permitData.r,
|
||||
permitData.s,
|
||||
permitData.expiry
|
||||
);
|
||||
|
||||
// transfer atokens to this address;
|
||||
_TransferAtokensWithCollateral(
|
||||
data._supplyTokens.length,
|
||||
aave,
|
||||
data.aTokens,
|
||||
data.supplyAmts,
|
||||
data._supplyTokens,
|
||||
enableCollateral,
|
||||
userAccount
|
||||
);
|
||||
|
||||
// borrow assets after migrating position
|
||||
if (data.convertStable) {
|
||||
_BorrowVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.totalBorrowAmtsWithFee
|
||||
);
|
||||
} else {
|
||||
_BorrowStable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.stableBorrowAmtsWithFee
|
||||
);
|
||||
_BorrowVariable(
|
||||
data._borrowTokens.length,
|
||||
aave,
|
||||
data._borrowTokens,
|
||||
data.variableBorrowAmtsWithFee
|
||||
);
|
||||
}
|
||||
|
||||
_eventName = "LogAaveV3ImportWithPermitAndCollateral(address,bool,address[],address[],uint256[],uint256[],uint256[],uint256[],bool[])";
|
||||
_eventParam = abi.encode(
|
||||
userAccount,
|
||||
inputData.convertStable,
|
||||
inputData.supplyTokens,
|
||||
inputData.borrowTokens,
|
||||
inputData.flashLoanFees,
|
||||
data.supplyAmts,
|
||||
data.stableBorrowAmts,
|
||||
data.variableBorrowAmts,
|
||||
enableCollateral
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Import aave V3 position .
|
||||
* @notice Import EOA's aave V3 position to DSA's aave v3 position
|
||||
* @param userAccount The address of the EOA from which aave position will be imported
|
||||
* @param inputData The struct containing all the neccessary input data
|
||||
* @param permitData The struct containing signed permit data like v,r,s,expiry
|
||||
*/
|
||||
function importAave(
|
||||
address userAccount,
|
||||
ImportInputData memory inputData,
|
||||
SignedPermits memory permitData
|
||||
)
|
||||
external
|
||||
payable
|
||||
returns (string memory _eventName, bytes memory _eventParam)
|
||||
{
|
||||
(_eventName, _eventParam) = _importAave(
|
||||
userAccount,
|
||||
inputData,
|
||||
permitData
|
||||
);
|
||||
}
|
||||
|
||||
/**
|
||||
* @dev Import aave V3 position (with collateral).
|
||||
* @notice Import EOA's aave V3 position to DSA's aave v3 position
|
||||
* @param userAccount The address of the EOA from which aave position will be imported
|
||||
* @param inputData The struct containing all the neccessary input data
|
||||
* @param permitData The struct containing signed permit data like v,r,s,expiry
|
||||
* @param enableCollateral The boolean array to enable selected collaterals in the imported position
|
||||
*/
|
||||
function importAaveWithCollateral(
|
||||
address userAccount,
|
||||
ImportInputData memory inputData,
|
||||
SignedPermits memory permitData,
|
||||
bool[] memory enableCollateral
|
||||
)
|
||||
external
|
||||
payable
|
||||
returns (string memory _eventName, bytes memory _eventParam)
|
||||
{
|
||||
(_eventName, _eventParam) = _importAaveWithCollateral(
|
||||
userAccount,
|
||||
inputData,
|
||||
permitData,
|
||||
enableCollateral
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
contract ConnectV2AaveV3ImportPermitBase is AaveV3ImportPermitResolver {
|
||||
string public constant name = "Aave-v3-import-permit-v1";
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user