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openzeppelin-contracts-upgradeable
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俞永鹏
openzeppelin-contracts-upgradeable
Commits
f8c486ea
Commit
f8c486ea
authored
Oct 12, 2016
by
Manuel Araoz
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style changes to base token
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BaseToken.sol
contracts/BaseToken.sol
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contracts/BaseToken.sol
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f8c486ea
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@@ -7,48 +7,50 @@ import './ERC20.sol';
* ERC 20 token
*
* https://github.com/ethereum/EIPs/issues/20
* Based on
original
code by FirstBlood:
* Based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*/
contract BaseToken is ERC20 {
function transfer(address _to, uint256 _value) returns (bool success) {
if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
mapping(address => uint256) balances;
mapping (address => mapping (address => uint256)) allowed;
uint256 public totalSupply;
function transfer(address _to, uint256 _value) returns (bool success) {
if (balances[msg.sender] >= _value &&
balances[_to] + _value > balances[_to]) {
balances[msg.sender] -= _value;
balances[_to] += _value;
Transfer(msg.sender, _to, _value);
return true;
} else { return false; }
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balances[_from] >= _value &&
allowed[_from][msg.sender] >= _value &&
balances[_to] + _value > balances[_to]) {
balances[_to] += _value;
balances[_from] -= _value;
allowed[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
} else { return false; }
}
function balanceOf(address _owner) constant returns (uint256 balance) {
return balances[_owner];
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowed[msg.sender][_spender] = _value;
Approval(msg.sender, _spender, _value);
return true;
}
function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
return allowed[_owner][_spender];
}
}
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