Get the extension What is a PSBT in Bitcoin?
A PSBT (Partially Signed Bitcoin Transaction, BIP-174) is the standard format for handing an unsigned Bitcoin transaction from one tool to another. It carries the inputs, the outputs and the data a signer needs, and collects signatures until the transaction is complete.
Why it matters
It is what lets a watch-only wallet and an offline signer work together. The signer must decode it itself: the outputs and the fee are exactly what a tampered PSBT would change.
How Locker Protocol Wallet handles it
Locker Protocol Wallet builds the PSBT in the extension and passes it to Locker Vault by QR code. The Vault decodes it itself: every output, the fee as a share of the amount, outputs below the dust limit, and inputs this wallet does not control.
Questions
Is a PSBT safe to share?
It holds no private key, so whoever sees it cannot spend with it. It does reveal your addresses and amounts, so share it only with your own tools.
Does a PSBT work with Taproot?
Yes. PSBTs carry Native SegWit and Taproot inputs, both of which Locker Protocol Wallet uses on Bitcoin.