Sparrow Wallet — PSBT export flow

Sparrow Wallet can export PSBTs and BIP329 labels that work directly with SiriScore.

Analyse a transaction before signing

1. In Sparrow, go to Send and construct your transaction
2. Click Create Transaction then Export PSBT
3. Save the .psbt file or copy the base64 string
4. Paste into SiriScore — either at siriscore.xyz or via CLI:

btc-privacy-check --psbt "$(cat transaction.psbt | base64 -w0)"

The report will show you which privacy issues exist before you sign.

Export coin labels

Sparrow's label export (BIP329 JSONL) lets SiriScore detect tainted inputs (H8) and coinjoin outputs (H9).

1. In Sparrow, go to File → Export Wallet
2. Select Labels and export as .jsonl
3. Import into SiriScore:

# CLI
btc-privacy-check --psbt <b64> --import-sparrow sparrow-labels.jsonl

# Library
import siriscore
siriscore.import_labels("sparrow-labels.jsonl")

# Web UI — click "Import labels from Sparrow Wallet"

Label format

Sparrow exports one JSON object per line:

{"type":"tx","ref":"<txid>","label":"Exchange withdrawal","tag":"tainted"}
{"type":"addr","ref":"bc1q...","label":"KYC address","tag":"tainted"}
{"type":"output","ref":"<txid>:0","label":"Coinjoin output","tag":"coinjoin"}

Label system reference

Supported Sparrow versions

Sparrow v1.8+ using the BIP329 JSONL export format. The older simple {"txid:vout": "label"} JSON shape is also supported for backward compatibility.