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I am creating some test code which can create transactions and sign then, I already could do it with NON-Segwit multisig address, they were signed using my code and broadcasted. But when I tried with Segwit multisig, I got problems, it was not signing it right. Can someone walk me through the steps of creating and signing a multisig segwit transaction?

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  • Can you post how you were trying to sign segwit multisig?
    – Ava Chow
    Mar 16, 2020 at 22:45
  • I was trying to sign the same way as I was signing the traditional multisig wallet, I have the private key and the redeem script. Mar 17, 2020 at 1:53

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It sounds like you are using the non-segwit sighash algorithm. This is not correct. Segwit uses a different sighash algorithm as defined in BIP 143.

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