Contract Source Code (Solidity Standard Json-Input format)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./interfaces/IBRC20Factory.sol";


contract BRC20 {
    string public name;
    string public symbol;
    uint8 public immutable decimals;
    address public immutable factory;
    uint256  public totalSupply;
    mapping (address => uint256) public balanceOf;
    mapping (address => mapping(address => uint256)) public allowance;
    mapping (address => uint256) public nonces;

    bytes32 public DOMAIN_SEPARATOR;
    bytes32 public constant PERMIT_TYPEHASH = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
    bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");

    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Transfer(address indexed from, address indexed to, uint256 value);

    constructor() {
        (name, symbol, decimals) = IBRC20Factory(msg.sender).parameters();

        factory = msg.sender;

        uint256 chainId;
        assembly {
            chainId := chainid()
        }
        DOMAIN_SEPARATOR = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), keccak256(bytes('1')), chainId, address(this)));
    }

    function mint(address to, uint256 amount) external {
        require(msg.sender == factory, "unauthorized");
        _mint(to, amount);
    }

    function burn(uint256 amount) external {
        require(msg.sender == factory, "unauthorized");
        _burn(msg.sender, amount);
    }

    function approve(address spender, uint256 amount) external returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address to, uint256 amount) external returns (bool) {
        balanceOf[msg.sender] -= amount;

        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);
        return true;
    }

    function transferFrom(address from, address to, uint256 amount) external returns (bool) {
        uint256 allowed = allowance[from][msg.sender];

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);
        return true;
    }

    function permit(address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external {
        require(deadline >= block.timestamp, 'EXPIRED');
        unchecked {
            bytes32 digest = keccak256(
                abi.encodePacked(
                    '\x19\x01',
                    DOMAIN_SEPARATOR,
                    keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
                )
            );
            address recoveredAddress = ecrecover(digest, v, r, s);
            require(recoveredAddress != address(0) && recoveredAddress == owner, 'INVALID_SIGNATURE');
            allowance[recoveredAddress][spender] = value;
        }
        emit Approval(owner, spender, value);
    }

    function _mint(address to, uint256 amount) internal {
        totalSupply += amount;

        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal {
        balanceOf[from] -= amount;

        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;


interface IBRC20Factory {
    function parameters() external view returns (string memory name, string memory symbol, uint8 decimals);
}

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

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DOMAIN_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"permit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","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":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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