Transaction Hash:
Block:
7574575 at Apr-15-2019 08:07:45 PM +UTC
Transaction Fee:
0.000188588 ETH
$0.52
Gas Used:
47,147 Gas / 4 Gwei
Emitted Events:
98 |
EtheeraToken.Approval( tokenOwner=[Sender] 0x343a3c7f789335c9ea60932d34be258f643678d9, spender=0x2240Dab9...B5C502d4E, tokens=115792089237316195423570985008687907853269984665640564039457584007913129639935 )
|
Account State Difference:
Address | Before | After | State Difference | ||
---|---|---|---|---|---|
0x343a3C7F...F643678d9 |
0.082211089776752632 Eth
Nonce: 124
|
0.082022501776752632 Eth
Nonce: 125
| 0.000188588 | ||
0x9195E004...1F2e87925 | |||||
0xEA674fdD...16B898ec8
Miner
| (Ethermine) | 189.586540402373119758 Eth | 189.586728990373119758 Eth | 0.000188588 |
Execution Trace
EtheeraToken.approve( _spender=0x2240Dab907db71e64d3E0dbA4800c83B5C502d4E, _value=115792089237316195423570985008687907853269984665640564039457584007913129639935 ) => ( True )
approve[EtheeraToken (ln:155)]
Approval[EtheeraToken (ln:157)]
pragma solidity ^0.4.11; /** * @title Crowdsale * @dev Crowdsale is a base contract for managing a token crowdsale. * Crowdsales have a start and end timestamps, where investors can make * token purchases and the crowdsale will assign them tokens based * on a token per ETH rate. Funds collected are forwarded to a wallet * as they arrive. */ library SafeMath { function mul(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a * b; assert(a == 0 || c / a == b); return c; } function div(uint256 a, uint256 b) internal pure returns (uint256) { assert(b > 0); // Solidity automatically throws when dividing by 0 uint256 c = a / b; assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } function sub(uint256 a, uint256 b) internal pure returns (uint256) { assert(b <= a); return a - b; } function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; assert(c >= a); return c; } } contract Ownable { address public owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ function Ownable() public { owner = msg.sender; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(msg.sender == owner); _; } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) onlyOwner public { require(newOwner != address(0)); OwnershipTransferred(owner, newOwner); owner = newOwner; } } /** * @title ERC20Standard * @dev Simpler version of ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/179 */ contract ERC20Interface { function totalSupply() public constant returns (uint); function balanceOf(address tokenOwner) public constant returns (uint balance); function allowance(address tokenOwner, address spender) public constant 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 EtheeraToken is ERC20Interface,Ownable { using SafeMath for uint256; mapping(address => uint256) tokenBalances; mapping (address => mapping (address => uint256)) allowed; uint256 public totalSupply; string public constant name = "ETHEERA"; string public constant symbol = "ETA"; uint256 public constant decimals = 18; uint256 public constant INITIAL_SUPPLY = 75000000000; /** * @dev transfer token for a specified address * @param _to The address to transfer to. * @param _value The amount to be transferred. */ function transfer(address _to, uint256 _value) public returns (bool) { require(tokenBalances[msg.sender]>=_value); tokenBalances[msg.sender] = tokenBalances[msg.sender].sub(_value); tokenBalances[_to] = tokenBalances[_to].add(_value); Transfer(msg.sender, _to, _value); return true; } /** * @dev Gets the balance of the specified address. * @param _owner The address to query the the balance of. * @return An uint256 representing the amount owned by the passed address. */ function balanceOf(address _owner) constant public returns (uint256 balance) { return tokenBalances[_owner]; } /** * @dev Transfer tokens from one address to another * @param _from address The address which you want to send tokens from * @param _to address The address which you want to transfer to * @param _value uint256 the amount of tokens to be transferred */ function transferFrom(address _from, address _to, uint256 _value) public returns (bool) { require(_to != address(0)); require(_value <= tokenBalances[_from]); require(_value <= allowed[_from][msg.sender]); tokenBalances[_from] = tokenBalances[_from].sub(_value); tokenBalances[_to] = tokenBalances[_to].add(_value); allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); Transfer(_from, _to, _value); return true; } /** * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. * * 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 * @param _spender The address which will spend the funds. * @param _value The amount of tokens to be spent. */ function approve(address _spender, uint256 _value) public returns (bool) { allowed[msg.sender][_spender] = _value; Approval(msg.sender, _spender, _value); return true; } // ------------------------------------------------------------------------ // Total supply // ------------------------------------------------------------------------ function totalSupply() public constant returns (uint) { return totalSupply - tokenBalances[address(0)]; } // ------------------------------------------------------------------------ // Returns the amount of tokens approved by the owner that can be // transferred to the spender's account // ------------------------------------------------------------------------ function allowance(address tokenOwner, address spender) public constant returns (uint remaining) { return allowed[tokenOwner][spender]; } /** * @dev Increase the amount of tokens that an owner allowed to a spender. * * approve should be called when allowed[_spender] == 0. To increment * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _addedValue The amount of tokens to increase the allowance by. */ function increaseApproval(address _spender, uint _addedValue) public returns (bool) { allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue); Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } /** * @dev Decrease the amount of tokens that an owner allowed to a spender. * * approve should be called when allowed[_spender] == 0. To decrement * allowed value is better to use this function to avoid 2 calls (and wait until * the first transaction is mined) * From MonolithDAO Token.sol * @param _spender The address which will spend the funds. * @param _subtractedValue The amount of tokens to decrease the allowance by. */ function decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) { uint oldValue = allowed[msg.sender][_spender]; if (_subtractedValue > oldValue) { allowed[msg.sender][_spender] = 0; } else { allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue); } Approval(msg.sender, _spender, allowed[msg.sender][_spender]); return true; } // ------------------------------------------------------------------------ // Don't accept ETH // ------------------------------------------------------------------------ function () public payable { revert(); } event Debug(string message, address addr, uint256 number); /** * @dev Contructor that gives msg.sender all of existing tokens. */ function EtheeraToken(address wallet) public { owner = msg.sender; totalSupply = INITIAL_SUPPLY * 10 ** 18; tokenBalances[wallet] = totalSupply; //Since we divided the token into 10^18 parts } function mint(address wallet, address buyer, uint256 tokenAmount) public onlyOwner { require(tokenBalances[wallet] >= tokenAmount); // checks if it has enough to sell tokenBalances[buyer] = tokenBalances[buyer].add(tokenAmount); // adds the amount to buyer's balance tokenBalances[wallet] = tokenBalances[wallet].sub(tokenAmount); // subtracts amount from seller's balance Transfer(wallet, buyer, tokenAmount); totalSupply = totalSupply.sub(tokenAmount); } }