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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

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

contract OneToOneConvert {
    IERC20 public tokenA;
    IERC20 public tokenB;

    event Swap(address indexed sender, uint256 indexed amount);

    /// @param _tokenA The address of token A
    /// @param _tokenB The address of token B
    constructor(address _tokenA, address _tokenB) {
        tokenA = IERC20(_tokenA);
        tokenB = IERC20(_tokenB);
    }

    /// @notice Swap token A for token B
    /// @dev User must approve this contract to spend token A
    /// @param _amount The amount of token A to swap
    function swap(uint256 _amount) external {
        // burn token a
        tokenA.transferFrom(msg.sender, address(0x1), _amount);
        // send token b to user
        tokenB.transfer(msg.sender, _amount);

        emit Swap(msg.sender, _amount);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

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

    /**
     * @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` 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 amount) external returns (bool);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_tokenA","type":"address"},{"internalType":"address","name":"_tokenB","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Swap","type":"event"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"swap","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tokenA","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenB","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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

000000000000000000000000e3dbc4f88eaa632ddf9708732e2832eeaa6688ab0000000000000000000000008afe4055ebc86bd2afb3940c0095c9aca511d852

-----Decoded View---------------
Arg [0] : _tokenA (address): 0xe3DBC4F88EAa632DDF9708732E2832EEaA6688AB
Arg [1] : _tokenB (address): 0x8AFE4055Ebc86Bd2AFB3940c0095C9aca511d852

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000e3dbc4f88eaa632ddf9708732e2832eeaa6688ab
Arg [1] : 0000000000000000000000008afe4055ebc86bd2afb3940c0095c9aca511d852