ETH Price: $2,641.18 (-1.78%)

Transaction Decoder

Block:
22524367 at May-20-2025 01:16:23 PM +UTC
Transaction Fee:
0.000098683589409354 ETH $0.26
Gas Used:
46,458 Gas / 2.124146313 Gwei

Emitted Events:

406 MerchantToken.Approval( tokenOwner=[Sender] 0x77f5658dd8f465a6d9eb7b588b8843ec2cb1d504, spender=0x216B4B4B...4278Bfcae, tokens=115792089237316195423570985008687907853269984665640564039457584007913129639935 )

Account State Difference:

  Address   Before After State Difference Code
(Titan Builder)
14.880902502845980011 Eth14.880910919712223881 Eth0.00000841686624387
0x77f5658D...c2CB1D504
0.512832182341547749 Eth
Nonce: 4
0.512733498752138395 Eth
Nonce: 5
0.000098683589409354
0xE66b3AA3...69DB3324F

Execution Trace

MerchantToken.approve( spender=0x216B4B4Ba9F3e719726886d34a177484278Bfcae, tokens=115792089237316195423570985008687907853269984665640564039457584007913129639935 ) => ( success=True )
pragma solidity ^0.5.0;


contract ERC20Interface {
    function totalSupply() public view returns (uint);
    function balanceOf(address tokenOwner) public view returns (uint balance);
    function allowance(address tokenOwner, address spender) public view returns (uint remaining);
    function transfer(address to, uint tokens) public returns (bool success);
    function approve(address spender, uint tokens) public returns (bool success);
    function transferFrom(address from, address to, uint tokens) public returns (bool success);

    event Transfer(address indexed from, address indexed to, uint tokens);
    event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
}


contract SafeMath {
    function safeAdd(uint a, uint b) public pure returns (uint c) {
        c = a + b;
        require(c >= a);
    }
    function safeSub(uint a, uint b) public pure returns (uint c) {
        require(b <= a); c = a - b; } function safeMul(uint a, uint b) public pure returns (uint c) { c = a * b; require(a == 0 || c / a == b); } function safeDiv(uint a, uint b) public pure returns (uint c) { require(b > 0);
        c = a / b;
    }
}


contract MerchantToken is ERC20Interface, SafeMath {
    string constant public name = "Merchant Token";
    string constant public symbol = "MTO";
    uint8 constant public decimals = 18;
    uint256 constant public _totalSupply = 100000000000000000000000000;
    
    mapping(address => uint) public balances;
    mapping(address => mapping(address => uint)) public allowed;

    constructor() public {
        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }

    function totalSupply() public view returns (uint) {
        return _totalSupply  - balances[address(0)];
    }

    function balanceOf(address tokenOwner) public view returns (uint balance) {
        return balances[tokenOwner];
    }

    function allowance(address tokenOwner, address spender) public view returns (uint remaining) {
        return allowed[tokenOwner][spender];
    }

    function approve(address spender, uint tokens) public returns (bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }
    
    function increaseApproval(address spender, uint tokens) public returns (bool success) {
        allowed[msg.sender][spender] = safeAdd(allowed[msg.sender][spender], tokens);
        return true;
    }
    
    function decreaseApproval(address spender, uint tokens) public returns (bool success) {
        allowed[msg.sender][spender] = safeSub(allowed[msg.sender][spender], tokens);
        return true;
    }

    function transfer(address to, uint tokens) public returns (bool success) {
        balances[msg.sender] = safeSub(balances[msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(msg.sender, to, tokens);
        return true;
    }

    function transferFrom(address from, address to, uint tokens) public returns (bool success) {
        balances[from] = safeSub(balances[from], tokens);
        allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(from, to, tokens);
        return true;
    }
}