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Ethereum_Improvement_Proposal_(EIP).sol
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Ethereum_Improvement_Proposal_(EIP).sol
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pragma solidity ^0.4.16;
interface ERC20 {
function totalSupply() public constant returns (uint256);
function balanceOf(address tokenOwner) public constant returns (uint256 balance);
function allowance(address tokenOwner, address spender) public constant returns (uint256 remaining);
function transfer(address to, uint256 tokens) public returns (bool success);
function approve(address spender, uint256 tokens) public returns (bool success);
function transferFrom(address from, address to, uint256 tokens) public returns (bool success);
event Transfer(address indexed from, address indexed to, uint256 tokens);
event Approval(address indexed tokenOwner, address indexed spender, uint256 tokens);
}
contract MyToken is ERC20 {
string public name = "MyToken";
string public symbol = "MTK";
uint8 public decimals = 18;
uint256 public totalSupply;
mapping(address => uint256) balances;
mapping(address => mapping (address => uint256)) allowed;
function MyToken() public {
totalSupply = 1000000000 * 10 ** uint256(decimals);
balances[msg.sender] = totalSupply;
}
function transfer(address _to, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value && _value > 0);
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
}
function balanceOf(address _owner) public constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) public returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0);
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
balances[_to] += _value;
Transfer(_from, _to, _value);
return true;
}
}