diff options
-rw-r--r-- | std/ExampleToken | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/std/ExampleToken b/std/ExampleToken new file mode 100644 index 00000000..6d617199 --- /dev/null +++ b/std/ExampleToken @@ -0,0 +1,55 @@ +import "./Token"; + +contract ExampleToken is Token { + uint256 tokenSupply; + mapping (address => uint256) balances; + mapping (address => + mapping (address => uint256)) approvedTransfers; + + function ExampleToken(address _initialOwner, uint256 _supply) { + tokenSupply = _supply; + balances[_initialOwner] = _supply; + } + + function totalSupply() constant returns (uint256 supply) { + return tokenSupply; + } + + function balanceOf(address _owner) constant returns (uint256 balance) { + return balances[_owner]; + } + + function transfer(address _to, uint256 _value) returns (bool success) { + if (balances[msg.sender] >= _value) { + 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 (approvedTransfers[_from][msg.sender] >= _value) { + approvedTransfers[_from][msg.sender] -= _value; + balances[_to] += _value; + Transfer(_from, _to, _value); + return true; + } + else { + return false; + } + } + + function approve(address _spender, uint256 _value) returns (bool success) { + approvedTransfers[msg.sender][_spender] = _value; + Approval(msg.sender, _spender, _value); + return true; + } + + function allowance(address _owner, address _spender) constant returns (uint256 remaining) { + return approvedTransfers[_owner][_spender]; + } +} |