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Gas: 30.1 GWei
 

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Multichain Info

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Transaction Hash
Method
Block
From
To
Value
Escrow Agent End...592510682024-07-12 1:10:1422 hrs ago1720746614IN
0x7eeF5D20...594304918
0 MATIC0.0102814487.05124618
Seller Withdraw592108852024-07-11 1:20:5046 hrs ago1720660850IN
0x7eeF5D20...594304918
0 MATIC0.00973539115.1517751
Buyer Forward Fu...592108662024-07-11 1:20:1046 hrs ago1720660810IN
0x7eeF5D20...594304918
0 MATIC0.00336001111.64679133
Create Verified ...592108472024-07-11 1:19:2846 hrs ago1720660768IN
0x7eeF5D20...594304918
0 MATIC0.02319416114.87436754
Seller Withdraw592107912024-07-11 1:17:3046 hrs ago1720660650IN
0x7eeF5D20...594304918
0 MATIC0.01128337133.46158662
Buyer Forward Fu...592107572024-07-11 1:16:1846 hrs ago1720660578IN
0x7eeF5D20...594304918
0 MATIC0.00355638118.1720131
Create Verified ...592107352024-07-11 1:15:3046 hrs ago1720660530IN
0x7eeF5D20...594304918
0 MATIC0.02259186111.89134192
Seller Withdraw592102212024-07-11 0:57:1847 hrs ago1720659438IN
0x7eeF5D20...594304918
0 MATIC0.0083142598.34235897
Buyer Forward Fu...592102022024-07-11 0:56:3847 hrs ago1720659398IN
0x7eeF5D20...594304918
0 MATIC0.00318671105.8884933
Create Verified ...592101752024-07-11 0:55:4047 hrs ago1720659340IN
0x7eeF5D20...594304918
0 MATIC0.0194922196.53961613
Seller Withdraw592099042024-07-11 0:46:0647 hrs ago1720658766IN
0x7eeF5D20...594304918
0 MATIC0.01203369142.33647204
Buyer Forward Fu...592098882024-07-11 0:45:3247 hrs ago1720658732IN
0x7eeF5D20...594304918
0 MATIC0.00427933142.19418111
Create Verified ...592098632024-07-11 0:44:3847 hrs ago1720658678IN
0x7eeF5D20...594304918
0 MATIC0.03093399153.20758585
Seller Withdraw592096792024-07-11 0:38:0647 hrs ago1720658286IN
0x7eeF5D20...594304918
0 MATIC0.01261685149.23413966
Buyer Forward Fu...592096582024-07-11 0:37:2247 hrs ago1720658242IN
0x7eeF5D20...594304918
0 MATIC0.00451927150.16704345
Create Verified ...592096382024-07-11 0:36:4047 hrs ago1720658200IN
0x7eeF5D20...594304918
0 MATIC0.03195652158.27190983
Seller Withdraw592094962024-07-11 0:31:3847 hrs ago1720657898IN
0x7eeF5D20...594304918
0 MATIC0.01605341157.93765983
Buyer Forward Fu...592094292024-07-11 0:29:1647 hrs ago1720657756IN
0x7eeF5D20...594304918
0 MATIC0.00449942149.50729157
Create Verified ...592094032024-07-11 0:28:2047 hrs ago1720657700IN
0x7eeF5D20...594304918
0 MATIC0.03127042154.87384453
Buyer Forward Fu...592060972024-07-10 22:31:162 days ago1720650676IN
0x7eeF5D20...594304918
0 MATIC0.0009157130.42742692
Create Verified ...592060702024-07-10 22:30:182 days ago1720650618IN
0x7eeF5D20...594304918
0 MATIC0.0062470930.94014619
Escrow Agent End...591142602024-07-08 15:55:334 days ago1720454133IN
0x7eeF5D20...594304918
0 MATIC0.0055249454.70455721
Create Verified ...590079062024-07-06 0:22:516 days ago1720225371IN
0x7eeF5D20...594304918
0 MATIC0.0060577930.00082365
Create Verified ...589316972024-07-04 2:49:298 days ago1720061369IN
0x7eeF5D20...594304918
0 MATIC0.0068948834.14441459
Escrow Agent End...589258362024-07-03 23:21:509 days ago1720048910IN
0x7eeF5D20...594304918
0 MATIC0.0035428830.00000002
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Contract Source Code Verified (Exact Match)

Contract Name:
VerifiedTransactions

Compiler Version
v0.8.12+commit.f00d7308

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, None license
File 1 of 6 : VerifiedTransactions.sol
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

/*
 * @dev the goal here was to integrate in SellerDepositTransaction
 * features into MultiProductEscrow.  Majorly the existence
 * of an escrow agent and free choice of sellers.
 */

contract VerifiedTransactions is Ownable {
    struct VerifiedTransaction {
        address seller;
        address buyer;
        address escrowAgent;
        uint256 productPrice;
        uint256 purchaseTime;
        bool engaged;
        bool buyerFundsLocked;
        bool buyerFundsForwarded;
        bool transactionEnded;

        uint256 amountToSellerAtEnd;
        uint256 amountToBuyerAtEnd;
    }

    mapping(string => VerifiedTransaction) public transactions;
    mapping(address => bool) public escrowAgents;

    address public usdcAddress = 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174;
    uint256 public constant timeUntilFundsReleasedAutomatically = 14 days;

    constructor(address _usdcAddress) {
        usdcAddress = _usdcAddress;
    }


    modifier onlyEscrowAgent(string calldata transactionId) {
        require(transactions[transactionId].engaged, "Transaction not engaged.");
        require(!transactions[transactionId].transactionEnded, "Transaction already ended.");
        require(msg.sender == transactions[transactionId].escrowAgent, "Only the escrow agent can call this function.");
        _;
    }

    function addEscrowAgent(address newAgent) public onlyOwner {
        escrowAgents[newAgent] = true;
    }

    function removeEscrowAgent(address agent) public onlyOwner {
        escrowAgents[agent] = false;
    }

    function createVerifiedTransaction(
        string calldata transactionId,
        address seller,
        address escrowAgent,
        uint256 productPrice
    ) public {
        require(!transactions[transactionId].engaged, "Transaction already engaged.");
        require(escrowAgents[escrowAgent], "Escrow agent not in the list of approved agents.");

        address buyer = msg.sender;
        require(
            ERC20(usdcAddress).transferFrom(buyer, address(this), productPrice),
            "Transfer failed."
        );

        transactions[transactionId] = VerifiedTransaction({
            seller: seller,
            buyer: buyer,
            escrowAgent: escrowAgent,
            productPrice: productPrice,
            purchaseTime: block.timestamp,
            engaged: true,
            buyerFundsLocked: false,
            buyerFundsForwarded: false,
            transactionEnded: false,
            amountToSellerAtEnd: 0,
            amountToBuyerAtEnd: 0
        });
    }


    function sellerRefundTransaction(string calldata transactionId) public {
        VerifiedTransaction storage transaction = transactions[transactionId];
        require(transaction.engaged, "Transaction not engaged.");
        require(!transaction.transactionEnded, "Transaction already ended.");
        require(
            msg.sender == transaction.seller,
            "Only the seller can call this function."
        );
        transaction.transactionEnded = true;
        transaction.amountToBuyerAtEnd = transaction.productPrice;
        uint256 buyerRefund = transaction.productPrice;
        require(ERC20(usdcAddress).transfer(transaction.buyer, buyerRefund));
    }

    function buyerLockFunds(string calldata transactionId) public {
        VerifiedTransaction storage transaction = transactions[transactionId];
        require(msg.sender == transaction.buyer, "Only the buyer can call this function.");
        require(!transaction.buyerFundsForwarded, "Buyer has already forwarded the funds.");
        transaction.buyerFundsLocked = true;
    }

    function buyerUnlockFunds(string calldata transactionId) public {
        require(msg.sender == transactions[transactionId].buyer, "Only the buyer can call this function.");
        transactions[transactionId].buyerFundsLocked = false;
    }

    function buyerForwardFunds(string calldata transactionId) public {
        VerifiedTransaction storage transaction = transactions[transactionId];
        require(msg.sender == transaction.buyer, "Only the buyer can call this function.");
        require(!transaction.buyerFundsLocked, "Funds are locked by the buyer.");
        transaction.buyerFundsForwarded = true;
    }

    function escrowAgentEndTransaction(
        string calldata transactionId,
        uint256 buyerAmount,
        uint256 sellerAmount
    ) public onlyEscrowAgent(transactionId) {
        VerifiedTransaction storage transaction = transactions[transactionId];
        require(buyerAmount + sellerAmount == transaction.productPrice, "Amounts do not match transaction value.");
        transaction.transactionEnded = true;
        transaction.amountToSellerAtEnd = sellerAmount;
        transaction.amountToBuyerAtEnd = buyerAmount;


        require(
            ERC20(usdcAddress).transfer(transaction.buyer, buyerAmount),
            "Buyer transfer failed."
        );
        require(
            ERC20(usdcAddress).transfer(transaction.seller, sellerAmount),
            "Seller transfer failed."
        );
    }

    function sellerWithdraw(string calldata transactionId) public {
        VerifiedTransaction storage transaction = transactions[transactionId];
        require(transaction.engaged, "Transaction not engaged.");
        require(!transaction.transactionEnded, "Transaction already ended.");
        require(msg.sender == transaction.seller, "Only the seller can call this function.");
        require(
            transaction.buyerFundsForwarded ||
            ( block.timestamp > transaction.purchaseTime + timeUntilFundsReleasedAutomatically &&
            transaction.buyerFundsLocked == false )
            ,
            "Funds have not been forwarded or not enough time has passed."
        );

        transaction.transactionEnded = true;
        uint256 totalFunds = transaction.productPrice;
        transaction.amountToSellerAtEnd = totalFunds;
        require(
            ERC20(usdcAddress).transfer(transaction.seller, totalFunds),
            "Seller transfer failed."
        );
    }
}

File 2 of 6 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 6 : ERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;

import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * The default value of {decimals} is 18. To change this, you should override
 * this function so it returns a different value.
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

    /**
     * @dev Sets the values for {name} and {symbol}.
     *
     * All two of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5.05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the default value returned by this function, unless
     * it's overridden.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view virtual override returns (uint8) {
        return 18;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * This internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(address from, address to, uint256 amount) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _balances[account] += amount;
        }
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * has been transferred to `to`.
     * - when `from` is zero, `amount` tokens have been minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens have been burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
}

File 4 of 6 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

File 5 of 6 : IERC20Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
interface IERC20Metadata is IERC20 {
    /**
     * @dev Returns the name of the token.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the symbol of the token.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the decimals places of the token.
     */
    function decimals() external view returns (uint8);
}

File 6 of 6 : IERC20.sol
// 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);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_usdcAddress","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"newAgent","type":"address"}],"name":"addEscrowAgent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"}],"name":"buyerForwardFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"}],"name":"buyerLockFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"}],"name":"buyerUnlockFunds","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"},{"internalType":"address","name":"seller","type":"address"},{"internalType":"address","name":"escrowAgent","type":"address"},{"internalType":"uint256","name":"productPrice","type":"uint256"}],"name":"createVerifiedTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"},{"internalType":"uint256","name":"buyerAmount","type":"uint256"},{"internalType":"uint256","name":"sellerAmount","type":"uint256"}],"name":"escrowAgentEndTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"escrowAgents","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"agent","type":"address"}],"name":"removeEscrowAgent","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"}],"name":"sellerRefundTransaction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"transactionId","type":"string"}],"name":"sellerWithdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"timeUntilFundsReleasedAutomatically","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"transactions","outputs":[{"internalType":"address","name":"seller","type":"address"},{"internalType":"address","name":"buyer","type":"address"},{"internalType":"address","name":"escrowAgent","type":"address"},{"internalType":"uint256","name":"productPrice","type":"uint256"},{"internalType":"uint256","name":"purchaseTime","type":"uint256"},{"internalType":"bool","name":"engaged","type":"bool"},{"internalType":"bool","name":"buyerFundsLocked","type":"bool"},{"internalType":"bool","name":"buyerFundsForwarded","type":"bool"},{"internalType":"bool","name":"transactionEnded","type":"bool"},{"internalType":"uint256","name":"amountToSellerAtEnd","type":"uint256"},{"internalType":"uint256","name":"amountToBuyerAtEnd","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"usdcAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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Deployed Bytecode

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa84174

-----Decoded View---------------
Arg [0] : _usdcAddress (address): 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000002791bca1f2de4661ed88a30c99a7a9449aa84174


Deployed Bytecode Sourcemap

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Swarm Source

ipfs://e2c008bec80be1a4009ac15404a482d89a39d3ee326b251594f05fa9348470f5

Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.