GCT GCT is a standard Ethereum token fully backed by physical gold. Refer to https://gold.codetract.io for more information. For developers Ethereum mainnet GCT address: 0x560c5528ff9886d83Ae117845B180E6DCF6B5175 Functions transfer(address _to, uint256 _value) transferFrom(address _from, address _to, uint256 _value) balanceOf(address _owner) approve(address _spender, uint256 _value) allowance(address _owner, address _spender) approveAndCall(address _spender, uint256 _value, bytes _extraData) totalSupply() goldBalanceGram(address _from) goldGramEquivalent(uint256 _valueGCT)