pragma solidity ^0.4.26;
contract ERC20Token {
mapping (address => uint256) balances;
address public owner;
string public name;
string public symbol;
uint8 public decimals = 18;
// total amount of tokens
uint256 public totalSupply;
// `allowed` tracks any extra transfer rights as in all ERC20 tokens
mapping (address => mapping (address => uint256)) allowed;
constructor() public {
uint256 initialSupply = 100000000;
totalSupply = initialSupply * 10 ** uint256(decimals);
balances[msg.sender] = totalSupply;
name = "Cpct Coin";
symbol = "CFB";
}
/// @param _owner The address from which the balance will be retrieved
/// @return The balance
function balanceOf(address _owner) public view returns (uint256 balance) {
return balances[_owner];
}
/// @notice send `_value` token to `_to` from `msg.sender`
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transfer(address _to, uint256 _value) public returns (bool success) {
require(_value > 0 ); // Check send token value > 0;
require(balances[msg.sender] >= _value); // Check if the sender has enough
require(balances[_to] + _value > balances[_to]); // Check for overflows
balances[msg.sender] -= _value; // Subtract from the sender
balances[_to] += _value; // Add the same to the recipient
emit Transfer(msg.sender, _to, _value); // Notify anyone listening that this transfer took place
return true;
}
/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
/// @param _from The address of the sender
/// @param _to The address of the recipient
/// @param _value The amount of token to be transferred
/// @return Whether the transfer was successful or not
function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
require(balances[_from] >= _value); // Check if the sender has enough
require(balances[_to] + _value >= balances[_to]); // Check for overflows
require(_value <= allowed[_from][msg.sender]); // Check allowance
balances[_from] -= _value; // Subtract from the sender
balances[_to] += _value; // Add the same to the recipient
allowed[_from][msg.sender] -= _value;
emit Transfer(_from, _to, _value);
return true;
}
/// @notice `msg.sender` approves `_spender` to spend `_value` tokens
/// @param _spender The address of the account able to transfer the tokens
/// @param _value The amount of tokens to be approved for transfer
/// @return Whether the approval was successful or not
function approve(address _spender, uint256 _value) public returns (bool success) {
require(balances[msg.sender] >= _value);
allowed[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
/// @param _owner The address of the account owning tokens
/// @param _spender The address of the account able to transfer the tokens
/// @return Amount of remaining tokens allowed to spent
function allowance(address _owner, address _spender) public view returns (uint256 remaining) {
return allowed[_owner][_spender];
}
/* This unnamed function is called whenever someone tries to send ether to it */
function () private {
revert(); // Prevents accidental sending of ether
}
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}
{
"compilationTarget": {
"ERC20Token.sol": "ERC20Token"
},
"evmVersion": "byzantium",
"libraries": {},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}
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