def parse_witness_section(witness_hex):
    # Convert hex to raw bytes
    data = bytes.fromhex(witness_hex)
    cursor = 0

    print(f"--- Parsing Witness Data Structure ---")

    # In a real TX, we would know how many inputs there are.
    # For this simulation, we will parse one input's witness stack.

    # 1. Read Item Count
    item_count = data[cursor]
    cursor += 1
    print(f"[*] Witness Item Count: {item_count}")

    for i in range(item_count):
        # 2. Read Item Length
        item_len = data[cursor]
        cursor += 1

        # 3. Extract Item Data
        item_data = data[cursor:cursor+item_len]
        cursor += item_len

        print(f"\n[Item {i}]")
        print(f"[*] Length: {item_len} bytes")
        print(f"[*] Hex:    {item_data.hex()[:40]}...")

        # Heuristic to identify if it's a pubkey
        if item_len == 33:
            print("[*] Inference: This is a Compressed Public Key.")
        elif item_len \u003e 60:
            print("[*] Inference: This is an ECDSA Signature.")

# --- Simulation ---
# A raw witness hex for a P2WPKH input:
# [02] -> Item Count (2)
# [47] -> Item 1 Len (71)
# [3044...] -> Signature
# [21] -> Item 2 Len (33)
# [02...] -> Pubkey
sample_witness = (
    "02" + 
    "47" + "3044022026859367ca7e2c943806297491730419266993a46611f71a0673c683c316226a022003c274191730419266993a46611f71a0673c683c316226a01" + 
    "21" + "0281cd6495d3550e553c3066d40026a090ef666993a46611f71a0673c683c31622"
)

parse_witness_section(sample_witness)