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solidity/GiftableToken.sol

@@ -7,16 +7,23 @@ contract GiftableToken {
 	address owner;
 	mapping(address => bool) minters;
 
+	// Implements ERC20
 	string public name;
+	// Implements ERC20
 	string public symbol;
+	// Implements ERC20
 	uint8 public decimals;
+	// Implements ERC20
 	uint256 public totalSupply;
+	// Implements ERC20
 	mapping (address => uint256) public balanceOf;
+	// Implements ERC20
 	mapping (address => mapping (address => uint256)) public allowance;
 
 	event Transfer(address indexed _from, address indexed _to, uint256 _value);
 	event TransferFrom(address indexed _from, address indexed _to, address indexed _spender, uint256 _value);
 	event Approval(address indexed _owner, address indexed _spender, uint256 _value);
+	event Mint(address indexed _minter, address indexed _beneficiary, uint256 _value);
 
 	constructor(string memory _name, string memory _symbol, uint8 _decimals) public {
 		owner = msg.sender;
@@ -32,6 +39,8 @@ contract GiftableToken {
 		balanceOf[_to] += _value;
 		totalSupply += _value;
 
+		emit Mint(msg.sender, _to, _value);
+
 		return true;
 	}
 
@@ -51,6 +60,7 @@ contract GiftableToken {
 		return true;
 	}
 
+	// Implements ERC20
 	function transfer(address _to, uint256 _value) public returns (bool) {
 		require(balanceOf[msg.sender] >= _value);
 		balanceOf[msg.sender] -= _value; 
@@ -59,6 +69,7 @@ contract GiftableToken {
 		return true;
 	}
 
+	// Implements ERC20
 	function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
 		require(allowance[_from][msg.sender] >= _value);
 		require(balanceOf[_from] >= _value);
@@ -69,9 +80,24 @@ contract GiftableToken {
 		return true;
 	}
 
+	// Implements ERC20
 	function approve(address _spender, uint256 _value) public returns (bool) {
 		allowance[msg.sender][_spender] += _value;
 		emit Approval(msg.sender, _spender, _value);
 		return true;
 	}
+
+	// Implements EIP165
+	function supportsInterface(bytes4 _sum) {
+		if (_sum == 0xc6bb4b70) { // ERC20
+			return true;
+		}
+		if (_sum == 0x449a52f8) { // Minter
+			return true;
+		}
+		if (_sum == 0x01ffc9a7) { // EIP165
+			return true;
+		}
+		return false;
+	}
 }