Contract Diff Checker

Contract Name:
AaveWrapperV3

Contract Source Code:

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the value of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the value of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves a `value` amount of tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 value) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets a `value` amount of tokens as the allowance of `spender` over the
     * caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 value) external returns (bool);

    /**
     * @dev Moves a `value` amount of tokens from `from` to `to` using the
     * allowance mechanism. `value` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

// AaveProtocolDataProvider
interface ILendingPoolV3 {
    function getReserveTokensAddresses(address asset) external view returns (address aTokenAddress, address stableDebtTokenAddress, address variableDebtTokenAddress);

    struct TokenData {
        string symbol;
        address tokenAddress;
    }

    function getAllReservesTokens() external view returns (TokenData[] memory);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IWrapper {
    error NotSupportedToken();
    error NotAddedMarket();
    error NotRemovedMarket();

    function wrap(IERC20 token) external view returns (IERC20 wrappedToken, uint256 rate);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

import "../interfaces/ILendingPoolV3.sol";
import "../interfaces/IWrapper.sol";

contract AaveWrapperV3 is IWrapper {
    // solhint-disable-next-line var-name-mixedcase
    ILendingPoolV3 private immutable _LENDING_POOL;

    mapping(IERC20 => IERC20) public aTokenToToken;
    mapping(IERC20 => IERC20) public tokenToaToken;

    constructor(ILendingPoolV3 lendingPool) {
        _LENDING_POOL = lendingPool;
    }

    function addMarkets(IERC20[] memory tokens) external {
        unchecked {
            for (uint256 i = 0; i < tokens.length; i++) {
                (address aTokenAddress,,) = _LENDING_POOL.getReserveTokensAddresses(address(tokens[i]));
                IERC20 aToken = IERC20(aTokenAddress);
                if(aToken == IERC20(address(0))) revert NotAddedMarket();
                aTokenToToken[aToken] = tokens[i];
                tokenToaToken[tokens[i]] = aToken;
            }
        }
    }

    function removeMarkets(IERC20[] memory tokens) external {
        unchecked {
            for (uint256 i = 0; i < tokens.length; i++) {
                (address aTokenAddress,,) = _LENDING_POOL.getReserveTokensAddresses(address(tokens[i]));
                IERC20 aToken = IERC20(aTokenAddress);
                if(aToken == IERC20(address(0))) revert NotRemovedMarket();
                delete aTokenToToken[aToken];
                delete tokenToaToken[tokens[i]];
            }
        }
    }

    function wrap(IERC20 token) external view override returns (IERC20 wrappedToken, uint256 rate) {
        IERC20 underlying = aTokenToToken[token];
        IERC20 aToken = tokenToaToken[token];
        if (underlying != IERC20(address(0))) {
            return (underlying, 1e18);
        } else if (aToken != IERC20(address(0))) {
            return (aToken, 1e18);
        } else {
            revert NotSupportedToken();
        }
    }
}

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