Support Platform

/// @dev This emits when ownership of any NFT changes by any mechanism.
///  This event emits when NFTs are created (`from` == 0) and destroyed
///  (`to` == 0). Exception: during contract creation, any number of NFTs
///  may be created and assigned without emitting Transfer. At the time of
///  any transfer, the approved address for that NFT (if any) is reset to none.
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);

/**
    @dev Either `TransferSingle` or `TransferBatch` MUST emit when tokens are transferred, including zero value transfers as well as minting or burning (see "Safe Transfer Rules" section of the standard).
    The `_operator` argument MUST be the address of an account/contract that is approved to make the transfer (SHOULD be msg.sender).
    The `_from` argument MUST be the address of the holder whose balance is decreased.
    The `_to` argument MUST be the address of the recipient whose balance is increased.
    The `_id` argument MUST be the token type being transferred.
    The `_value` argument MUST be the number of tokens the holder balance is decreased by and match what the recipient balance is increased by.
    When minting/creating tokens, the `_from` argument MUST be set to `0x0` (i.e. zero address).
    When burning/destroying tokens, the `_to` argument MUST be set to `0x0` (i.e. zero address).        
*/
event TransferSingle(address indexed _operator, address indexed _from, address indexed _to, uint256 _id, uint256 _value);

/**
    @dev Either `TransferSingle` or `TransferBatch` MUST emit when tokens are transferred, including zero value transfers as well as minting or burning (see "Safe Transfer Rules" section of the standard).      
    The `_operator` argument MUST be the address of an account/contract that is approved to make the transfer (SHOULD be msg.sender).
    The `_from` argument MUST be the address of the holder whose balance is decreased.
    The `_to` argument MUST be the address of the recipient whose balance is increased.
    The `_ids` argument MUST be the list of tokens being transferred.
    The `_values` argument MUST be the list of number of tokens (matching the list and order of tokens specified in _ids) the holder balance is decreased by and match what the recipient balance is increased by.
    When minting/creating tokens, the `_from` argument MUST be set to `0x0` (i.e. zero address).
    When burning/destroying tokens, the `_to` argument MUST be set to `0x0` (i.e. zero address).                
*/
event TransferBatch(address indexed _operator, address indexed _from, address indexed _to, uint256[] _ids, uint256[] _values);