Wallets • Estimated 35m

PSBT Signer Validation

custody.psbt-signer-validation

A PSBT signer should independently verify the referenced UTXOs, scripts, sighash type, amounts, fees, destinations, and change before producing signatures. The PSBT is a coordination container, not proof that the proposed transaction matches the signer's wallet policy or intent.

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Curated resources (2)

• BIP 174: Partially Signed Bitcoin Transaction Format (article) Canonical PSBT specification, including the checks signers must perform before accepting UTXO, script, and sighash data.
• Bitcoin Optech Topic: PSBT (article) Implementation-oriented history of PSBT safety, interoperability, and signer behavior across wallet software and hardware devices.

Direct prerequisites (1)

• PSBT Workflow

Direct dependents (0)

• None

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