Functions that are used for token transfers for ERC20 and ERC721 tokens

Question

Let's suppose there is a contract address A of an erc721 token B. If I want to monitor all of its transfers from A to another address say C then should I only filter the Transfer function or should I also monitor safeTransferFrom and transferFrom here. If yes then is there any other event apart from these three that I should be monitoring? And if no then why?

If the same scenario is considered for an erc20 contract then which functions should be monitored just Transfer or transferFrom as well?

Answer 1

On ERC20, all these functions emit the exact same event:

event Transfer(address indexed _from, address indexed _to, uint256 _value);

On ERC721, all these functions emit the exact same event:

event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);