fn parse_selector_bytes(s: &str) -> Result<[u8; 4], String>Expand description
Parse a selector string: a 4-byte hex (0xd09de08a), a full signature
(transfer(address,uint256)), or a well-known TIP-20 function name shorthand.
Recognized shorthands: transfer, approve, transferFrom, transferWithMemo,
transferFromWithMemo. These resolve to the standard ERC20/TIP-20 signatures.
Unknown names without parentheses are hashed as name().