noa

noa

Your Ark companion.

Installation

go install github.com/louisinger/noa@latest

Or build from source:

make install

Usage

address

noa address <address_ark>

Decodes an ARK address and displays:

• Address ARK
• Version and HRP (Human Readable Part)
• Public Keys (signer and tapkey)
• Script information (hex and asm)

script

noa script <script_hex>

Decodes a script and displays:

• ASM disassembly
• Ark Closure information (type and fields)

note

fromTxid

noa note fromTxid <txid_string>

Generates a note closure from a transaction ID (32-byte hash) and displays:

• Tapkey (hex)
• Script (hex and asm)

The txid is used as the preimage hash for the note closure, which is then used to generate the taproot tapkey and corresponding script.

taptree

decode

noa taptree decode <taptree_hex>

Decodes a taptree (hex-encoded) and displays:

• All scripts in the taptree (hex and asm)
• Output script (hex and asm)

encode

noa taptree encode <script1_hex> [script2_hex] ...

Encodes one or more scripts into a taptree and displays the encoded taptree (hex).

asset

packet decode

noa asset packet decode <script_hex>

Decodes an asset packet from a script (hex-encoded) and displays:

• Asset ID
• Asset amount
• Asset metadata (if present)

Asset packets are encoded in Bitcoin scripts and contain information about assets being transferred in Ark transactions.

psbt

decode

noa psbt decode <psbt_base64>

Decodes a PSBT (Partially Signed Bitcoin Transaction) from base64 or hex format and displays:

• Global transaction information (version, locktime, txid)
• Inputs with:
  • Previous outpoint and sequence
  • Redeem scripts and witness scripts
  • BIP32 derivation paths
  • Witness UTXO information
  • ARK PSBT fields (when present):
    • ConditionWitness
    • CosignerPublicKey
    • VtxoTaprootTree
    • VtxoTreeExpiry
• Outputs with:
  • Value and script (hex and asm)
  • Redeem scripts and witness scripts
  • BIP32 derivation paths
  • Asset packet information (when present in output scripts)

The command automatically detects whether the input is base64 or hex encoded.