abstract contract Core {

// native core functions

	function transfer(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);

	function approve(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);

	function increaseAllowance(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);

	function decreaseAllowance(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);

	function transferFrom(address[3] memory addressArr, uint[3] memory uintArr) external virtual returns(bool success);


//non-native core functions

	function mint(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);

	function burn(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);
	
	function updateTotalSupply(uint[2] memory uintArr) external virtual returns(bool success);
	
	function updateCurrentSupply(uint[2] memory uintArr) external virtual returns(bool success);
	
	function updateJointSupply(uint[2] memory uintArr) external virtual returns(bool success);


}
function transfer(address[2] memory addressArr, uint[2] memory uintArr) external virtual returns(bool success);
// native core functions