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Presign transaction with unconfirmed outputs

I think I found the answer to my question in the Bitcoin Lightning white paper. Section 3.1.1 ff explains it very well. Here is the link: Lightning White Paper
Neo's user avatar
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Presign transaction with unconfirmed outputs

Yes it is possible. It is in fact a technique at the core of most trustless protocols on top of Bitcoin. Including the most used one, the Lightning Network. Regarding the funding transaction ...
Antoine Poinsot's user avatar
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Is it possible to combine two PSBTs while retaining the existing signatures?

If you have two PSBTs of the same transaction, you can combine signatures from them to complete a transaction. However, it seems to me that you are talking about two PSBTs of different transactions. ...
Murch's user avatar
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