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sparrowwallet / sparrow

Desktop Bitcoin Wallet focused on security and privacy. Free and open source.
https://sparrowwallet.com/
Apache License 2.0
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[Feature request] Sign again or compare signature #1492

Closed mario7421 closed 2 months ago

mario7421 commented 2 months ago

I would like to sign again a transaction that is already confirmed on the blockchain, in order to verify whether a deterministic nonce was used during the original signing process. To achieve this, I intend to remove the existing signature and generate a new one using a different device than the one that originally signed the transaction. When I open a confirmed transaction there are no buttons to sign again, so I think this is currently not possible.

craigraw commented 2 months ago

Correct. If you wish to do this, I suggest creating and signing two identical transactions without broadcasting. Comparing the signatures will achieve the same verification that devices are using RFC6979 when signing.