def audit_scriptsig(scriptsig_hex):
    # 1. Identify the length of the script
    # The first byte is usually the length of the redeem script
    try:
        script_len = int(scriptsig_hex[:2], 16)
        redeem_script = scriptsig_hex[2:]
    except:
        print("[ERROR] Invalid ScriptSig format.")
        return

    print(f"--- Nested SegWit Audit ---")
    print(f"[*] Full ScriptSig: {scriptsig_hex}")
    print(f"[*] Script Length:  {script_len} bytes")

    # 2. Check for the Nested SegWit P2WPKH signature
    # Pattern: 00 (Version 0) 14 (Push 20 bytes)
    if script_len == 22 and redeem_script.startswith("0014"):
        print("[STATUS] MATCH: This is a Nested SegWit (P2SH-P2WPKH) spend.")
        pkh = redeem_script[4:]
        print(f"[*] Public Key Hash: {pkh}")
        print(f"[*] Logic: Move signatures to the Witness block.")

    # 3. Check for the Nested SegWit P2WSH signature
    # Pattern: 00 (Version 0) 20 (Push 32 bytes)
    elif script_len == 34 and redeem_script.startswith("0020"):
        print("[STATUS] MATCH: This is a Nested SegWit (P2SH-P2WSH) spend.")
        sh = redeem_script[4:]
        print(f"[*] Script Hash: {sh}")
        print(f"[*] Logic: Multi-signature witness logic detected.")

    else:
        print("[STATUS] NO MATCH: This is a standard P2SH (Legacy) spend.")

# --- Simulation ---

# Case 1: Standard Nested SegWit (P2WPKH)
# Length 22 (16 hex), starts with 0014
p2wpkh_scriptsig = "16001462e907b15cbf27d5425399ebf6f0fb50ebb88f18"
audit_scriptsig(p2wpkh_scriptsig)

# Case 2: Legacy P2SH Multisig
# Length is not 22 or 34
print("\n--- Next Audit ---")
legacy_scriptsig = "47522102f9e61c56f7e841f77d337d45e4120f44e132e01b3d36b85994f31c28b5e28a952103333333333333333333333333333333333333333333333333333333333333333352ae"
audit_scriptsig(legacy_scriptsig)