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Home»BITCOIN NEWS»Blockchain – Can a second signer add data to a Bitcoin PSBT transaction?
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Blockchain – Can a second signer add data to a Bitcoin PSBT transaction?

By Crypto FlexsJune 27, 20241 Min Read
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Blockchain – Can a second signer add data to a Bitcoin PSBT transaction?
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I am working on partially signed bitcoin transactions (PSBT) and have a question about the role of secondary signers in the signing process. I understand that in a multi-signature scenario, each participant must sign the transaction. However, I am wondering if it is possible for the second (or subsequent) signer to add additional data to the transaction in addition to the signature.

Here’s what I want to know specifically:

Can a second signer add additional metadata or input/output? Does the PSBT format support modifications by the signer other than adding a signature? Any insight or references to the documentation would be greatly appreciated!

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