Address Contract Partially Verified
Address
0x97D53f6158AE7578D65Bc38C0e0bD98BEF2A84Bd
Balance
0 ETH
Nonce
1
Code Size
3214 bytes
Creator
0xaAd2c3d6...b25B at tx 0x9ee1d98b...7ca39b
Indexed Transactions
0
Contract Bytecode
3214 bytes
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Verified Source Code Partial Match
Compiler: v0.4.26+commit.4563c3fc
EVM: byzantium
Optimization: No
EIP20.sol 148 lines
// Abstract contract for the full ERC 20 Token standard
// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
pragma solidity ^0.4.21;
contract EIP20Interface {
uint256 public totalSupply;
function balanceOf(address _owner) public view returns (uint256 balance);
function transfer(address _to, uint256 _value) public returns (bool success);
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success);
function approve(address _spender, uint256 _value) public returns (bool success);
function allowance(address _owner, address _spender) public view returns (uint256 remaining);
// solhint-disable-next-line no-simple-event-func-name
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
pragma solidity ^0.4.21;
contract EIP20 is EIP20Interface {
uint256 constant private MAX_UINT256 = 2**256 - 1;
mapping (address => uint256) public balances;
mapping (address => mapping (address => uint256)) public allowed;
/*
NOTE:
The following variables are OPTIONAL vanities. One does not have to include them.
They allow one to customise the token contract & in no way influences the core functionality.
Some wallets/interfaces might not even bother to look at this information.
*/
string public name; //fancy name: eg Simon Bucks
uint8 public decimals; //How many decimals to show.
string public symbol; //An identifier: eg SBX
function EIP20(
uint256 _initialAmount,
string _tokenName,
uint8 _decimalUnits,
string _tokenSymbol
) public {
balances[msg.sender] = _initialAmount; // Give the creator all initial tokens
totalSupply = _initialAmount; // Update total supply
name = _tokenName; // Set the name for display purposes
decimals = _decimalUnits; // Amount of decimals for display purposes
symbol = _tokenSymbol; // Set the symbol for display purposes
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
balances[msg.sender] -= _value;
balances[_to] += _value;
emit Transfer(msg.sender, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
uint256 allowance = allowed[_from][msg.sender];
require(balances[_from] >= _value && allowance >= _value);
balances[_to] += _value;
balances[_from] -= _value;
if (allowance < MAX_UINT256) {
allowed[_from][msg.sender] -= _value;
}
emit Transfer(_from, _to, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value); //solhint-disable-line indent, no-unused-vars
return true;
}
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
pragma solidity ^0.4.21;
contract EIP20Factory {
mapping(address => address[]) public created;
mapping(address => bool) public isEIP20; //verify without having to do a bytecode check.
bytes public EIP20ByteCode; // solhint-disable-line var-name-mixedcase
function EIP20Factory() public {
//upon creation of the factory, deploy a EIP20 (parameters are meaningless) and store the bytecode provably.
address verifiedToken = createEIP20(10000, "Verify Token", 3, "VTX");
EIP20ByteCode = codeAt(verifiedToken);
}
//verifies if a contract that has been deployed is a Human Standard Token.
//NOTE: This is a very expensive function, and should only be used in an eth_call. ~800k gas
function verifyEIP20(address _tokenContract) public view returns (bool) {
bytes memory fetchedTokenByteCode = codeAt(_tokenContract);
if (fetchedTokenByteCode.length != EIP20ByteCode.length) {
return false; //clear mismatch
}
//starting iterating through it if lengths match
for (uint i = 0; i < fetchedTokenByteCode.length; i++) {
if (fetchedTokenByteCode[i] != EIP20ByteCode[i]) {
return false;
}
}
return true;
}
function createEIP20(uint256 _initialAmount, string _name, uint8 _decimals, string _symbol)
public
returns (address) {
EIP20 newToken = (new EIP20(_initialAmount, _name, _decimals, _symbol));
created[msg.sender].push(address(newToken));
isEIP20[address(newToken)] = true;
//the factory will own the created tokens. You must transfer them.
newToken.transfer(msg.sender, _initialAmount);
return address(newToken);
}
//for now, keeping this internal. Ideally there should also be a live version of this that
// any contract can use, lib-style.
//retrieves the bytecode at a specific address.
function codeAt(address _addr) internal view returns (bytes outputCode) {
assembly { // solhint-disable-line no-inline-assembly
// retrieve the size of the code, this needs assembly
let size := extcodesize(_addr)
// allocate output byte array - this could also be done without assembly
// by using outputCode = new bytes(size)
outputCode := mload(0x40)
// new "memory end" including padding
mstore(0x40, add(outputCode, and(add(add(size, 0x20), 0x1f), not(0x1f))))
// store length in memory
mstore(outputCode, size)
// actually retrieve the code, this needs assembly
extcodecopy(_addr, add(outputCode, 0x20), 0, size)
}
}
}
Read Contract
allowance 0xdd62ed3e → uint256
allowed 0x5c658165 → uint256
balanceOf 0x70a08231 → uint256
balances 0x27e235e3 → uint256
decimals 0x313ce567 → uint8
name 0x06fdde03 → string
symbol 0x95d89b41 → string
totalSupply 0x18160ddd → uint256
Write Contract 3 functions
These functions modify contract state and require a wallet transaction to execute.
approve 0x095ea7b3
address _spender
uint256 _value
returns: bool
transfer 0xa9059cbb
address _to
uint256 _value
returns: bool
transferFrom 0x23b872dd
address _from
address _to
uint256 _value
returns: bool
Recent Transactions
No transactions found for this address