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Syntaxic proofs for BIP-372

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Signed-off-by: Dr. Maxim Orlovsky <orlovsky@pandoraprime.ch>
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Dr. Maxim Orlovsky 2022-08-21 21:25:53 +02:00
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GPG Key ID: 60094BAF18A26EC9
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@ -47,15 +47,15 @@ in client-side-validation protocols like RGB.
===Motivation=== ===Motivation===
P2C outputs can be detected onchain and spent only if the output owner P2C outputs can be detected onchain and spent only if the output owner
not just knowns the corresponding original private key, but also is aware about not just knows the corresponding original private key, but also is aware about
P2C tweak applied to the public key. In order to produce a valid signature, the P2C tweak applied to the public key. In order to produce a valid signature, the
same tweak value must be added (modulo group order) to the original private key same tweak value must be added (modulo group order) to the original private key
by a signer device. This represents a channelge for external signers, which may by a signer device. This represents a challenge for external signers, which may
not have any information about such commitment. This proposal addresses this not have any information about such commitment. This proposal addresses this
issue by adding relevant fields to the PSBT input information. issue by adding relevant fields to the PSBT input information.
The proposal abstracts details of specific P2C protocols and provides universal The proposal abstracts details of specific P2C protocols and provides universal
method for spending previous outpus containing P2C tweaks, applied to the public method for spending previous outputs containing P2C tweaks, applied to the public
key contained within any standard form of the <tt>scriptPubkey</tt>, including key contained within any standard form of the <tt>scriptPubkey</tt>, including
bare scripts and P2PK, P2PKH, P2SH, witness v0 P2WPKH, P2WSH, nested witness v0 bare scripts and P2PK, P2PKH, P2SH, witness v0 P2WPKH, P2WSH, nested witness v0
P2WPKH-P2SH, P2WSH-P2SH and witness v1 P2TR outputs. P2WPKH-P2SH, P2WSH-P2SH and witness v1 P2TR outputs.