Contract

0x3D7E5eE442051B6B4536ee09613cc913B4CfC943

Source Code

Overview

ETH Balance

0.005 ETH

Eth Value

$11.87 (@ $2,374.88/ETH)

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ContractCreator

0x0bb418...E45418b3 at txn 0xa288adf0403b4a34cbb92a7f91a5aa0d713a8d4280f932646ee65b3ee37e76c3

TokenTracker

Metaversal Post Office Telegraph (MPOT)

Multi Chain

Multichain Addresses

1 address found via

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Latest 7 from a total of 7 transactions

Transaction Hash	Method	Block		From		To	Value
0xa284f7bdd9cd5c0940015507f615a562c248ea74215379bcd79c17a62fb40b89	Mint	15454032	2022-09-01 16:58:56	462 days 10 hrs ago	1662051536	mint.adamstox.eth	IN	0x3D7E5e...B4CfC943	0.001 ETH	0.0014292	27.51058985
0xd865b1eca8950f9a6af4f5f168ef001ebd19b00025a31d88e11c2684f57742d9	Transfer From	15183402	2022-07-21 2:58:16	505 days 8 mins ago	1658372296	mint.adamstox.eth	IN	0x3D7E5e...B4CfC943	0 ETH	0.00058503	18.11971634
0x6dde3d367b9d9f98a0e0253ecb711454d593ba22f4cdfb989af8ba3f40c143be	Mint	15182935	2022-07-21 1:13:44	505 days 1 hr ago	1658366024	0x4e45AF...9020FC41	IN	0x3D7E5e...B4CfC943	0.001 ETH	0.00109025	20.64996944
0x65fc22eb44fe3cf5f58af535dbb350da938e05e185c513fb4cc3ceebf30605b4	Mint	15182893	2022-07-21 1:04:37	505 days 2 hrs ago	1658365477	mint.adamstox.eth	IN	0x3D7E5e...B4CfC943	0.001 ETH	0.00107477	20.10321997
0x386811b939a8eebe6670629bfda17c7ce843508b3c99bccf7e062d5426aac40d	Mint	15035542	2022-06-27 17:50:07	528 days 9 hrs ago	1656352207	jpangelle.eth	IN	0x3D7E5e...B4CfC943	0.001 ETH	0.0075593	145.81141511
0xc1adc1754d263d4a89cf567fe35a29caa9ff4dd42bfd0978b5445c80f84b1a65	Mint	15027236	2022-06-26 4:37:28	529 days 22 hrs ago	1656218248	mint.adamstox.eth	IN	0x3D7E5e...B4CfC943	0.001 ETH	0.00197906	38.19186363
0xa288adf0403b4a34cbb92a7f91a5aa0d713a8d4280f932646ee65b3ee37e76c3	0x66038d7e	15027030	2022-06-26 3:45:27	529 days 23 hrs ago	1656215127	0x0bb418...E45418b3	IN	Create: MPOTelegraph	0 ETH	0.02098167	15

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Parent Txn Hash	Block		From		To	Value

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Contract Source Code Verified (Exact Match)

Contract Name:

MPOTelegraph

Compiler Version

v0.8.14+commit.80d49f37

Optimization Enabled:

Yes with 200 runs

Other Settings:

default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 1 : MPOTelegraph.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

/// @dev This is a very stripped down ERC-721 knock-off with gas savings as a top priority. Some features may be unsafe or missing.

contract MPOTelegraph {
    address private _owner;
    uint256 private _price = 1000000000000000; // 0.001 eth
    string public name = "Metaversal Post Office Telegraph";
    string public symbol = "MPOT";
    string public baseURI = "https://9amtetu7r1.execute-api.us-east-1.amazonaws.com/?id=";

    constructor() {
        _owner = msg.sender;
    }

    // ERC721 --------------------------------------------------------------->>
    mapping(uint256 => address) private ownership;
    mapping(uint256 => address) private approvedForToken;
    mapping(address => mapping(address => bool)) private approvedForAll;
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    event Mint(address indexed from, uint256 indexed tokenId, string text);
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    function ownerOf(uint256 _tokenId) public view virtual returns (address) {
        return ownership[_tokenId];
    }

    function transferFrom(
        address _from,
        address _to,
        uint256 _tokenId
    ) public {
        require(msg.sender == ownership[_tokenId] || msg.sender == getApproved(_tokenId) || isApprovedForAll(ownership[_tokenId], msg.sender), "Unauthorized");
        require(ownership[_tokenId] == _from, "The from address does not own this token"); 

        // Clear approvals from the previous owner
        approvedForToken[_tokenId] = address(0);

        ownership[_tokenId] = _to;
        emit Transfer(_from, _to, _tokenId);
    }

    function approve(address _candidate, uint256 _tokenId) public virtual {
        require(msg.sender == ownership[_tokenId] || isApprovedForAll(ownership[_tokenId], msg.sender), "Unauthorized");
        approvedForToken[_tokenId] = _candidate;
        emit Approval(ownership[_tokenId], _candidate, _tokenId);
    }

    function getApproved(uint256 _tokenId) public view virtual returns (address) {
        return approvedForToken[_tokenId];
    }

    function setApprovalForAll(address _candidate, bool _approved) public virtual {
        approvedForAll[msg.sender][_candidate] = _approved;
        emit ApprovalForAll(msg.sender, _candidate, _approved);
    }

    function isApprovedForAll(address _owner, address _candidate) public view virtual returns (bool) {
        return approvedForAll[_owner][_candidate];
    }

    // UNSAFE - USE AT OWN RISK
    function safeTransferFrom(address _from, address _to, uint256 _tokenId) public { transferFrom(_from, _to, _tokenId); }
    function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes calldata data) public { transferFrom(_from, _to, _tokenId); }
    
    // Ignored
    function balanceOf(address _owner) public view virtual returns (uint256) { return 0; }
    // <<--------------------------------------------------------------- ERC721

    // ERC721Metadata-------------------------------------------------------->>
    function tokenURI(uint256 _tokenId) public view virtual returns (string memory) {
        return string(abi.encodePacked(baseURI, uint2str(_tokenId)));
    }
    // <<------------------------------------------------------- ERC721Metadata


    // ERC165 --------------------------------------------------------------->>
    function supportsInterface(bytes4 _interfaceId) public pure returns (bool) {
        return _interfaceId == 0x80ac58cd || // IERC721
            _interfaceId == 0x5b5e139f || // IERC721Metadata
            _interfaceId == 0x01ffc9a7; // IERC165
    }
    // <<--------------------------------------------------------------- ERC165

    // Other functions ------------------------------------------------------>>

    function updateBaseURI(string memory uri) public {
        require(msg.sender == _owner, "Unauthorized");
        baseURI = uri;
    }

    function price() public view returns (uint256) {
        return _price;
    }

    function updatePrice(uint256 newPrice) public {
        require(msg.sender == _owner, "Unauthorized");
        _price = newPrice;
    }

    function owner() public view returns (address) {
        return _owner;
    }

    function transferOwnership(address newOwner) public {
        require(msg.sender == _owner, "Unauthorized");
        _owner = newOwner;
    }

    function mint(uint256 id, address to, string calldata text) public payable {
        require(to != address(0), "No recipient");
        require(msg.value >= _price, "Send more ETH");
        require(ownership[id] == address(0), "ID already in use");
        ownership[id] = to;

        // What a normal mint event looks like
        emit Transfer(address(0), to, id);
        // Additional mint event to get the sender and text on-chain
        emit Mint(msg.sender, id, text);
    }

    function reply(uint256 id, address to, string calldata text) public {
        require(to != msg.sender, "Sorry, can't reply to yourself");
        require(ownership[id] != address(0), "ID doesn't exist");
        require(msg.sender == ownership[id] || msg.sender == getApproved(id) || isApprovedForAll(ownership[id], msg.sender), "Not your message to burn");
        ownership[id] = to;
        // Burn for housekeeping
        emit Transfer(ownership[id], address(0), id);
        // Transfer to prev 'from' address (now 'to' address) to bypass marketplace hidden folder rules
        emit Transfer(address(0), ownership[id], id);
        // Mint for the new message
        emit Mint(msg.sender, id, text);
    }

    // Required by etherscan.io
    function totalSupply() public view virtual returns (uint256) {
        return 1;
    }

    function withdraw() public payable {
        (bool success, ) = payable(_owner).call{value: address(this).balance}("");
        require(success, "Could not transfer money to contractOwner");
    }

    function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
        if (_i == 0) {
            return "0";
        }
        uint j = _i;
        uint len;
        while (j != 0) {
            len++;
            j /= 10;
        }
        bytes memory bstr = new bytes(len);
        uint k = len;
        while (_i != 0) {
            k = k-1;
            uint8 temp = (48 + uint8(_i - _i / 10 * 10));
            bytes1 b1 = bytes1(temp);
            bstr[k] = b1;
            _i /= 10;
        }
        return string(bstr);
    }

}

Settings

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "forge-std/=lib/forge-std/src/",
    "src/=src/",
    "test/=test/",
    "script/=script/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

Contract Security Audit

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Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"string","name":"text","type":"string"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"_candidate","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"baseURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_candidate","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"string","name":"text","type":"string"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"string","name":"text","type":"string"}],"name":"reply","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_candidate","type":"address"},{"internalType":"bool","name":"_approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"_interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"address","name":"_to","type":"address"},{"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"uri","type":"string"}],"name":"updateBaseURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"newPrice","type":"uint256"}],"name":"updatePrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"payable","type":"function"}]

Contract Creation Code

Decompile Bytecode Switch to Opcodes View

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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.

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