Web3 integration · medium

33. Bytes and hex encoding

Convert between hex text and raw bytes.

Write `hex_to_bytes(hex_str)` that strips an optional `"0x"` prefix and returns the corresponding `bytes` using `bytes.fromhex`.

Required in your answer: bytes.fromhexstartswith

Runs via Pyodide

def hex_to_bytes(hex_str):
    # TODO: strip "0x" prefix if present, then bytes.fromhex
    pass

Output appears here.