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Date: Mon, 06 May 2024 08:56:21 -1000
From: "David A. Harding" <dave@dtrt.org>
To: Andrew Poelstra <apoelstra@wpsoftware.net>
Cc: Matthew Zipkin <pinheadmz@gmail.com>, Ethan Heilman <eth3rs@gmail.com>,
Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: Re: [bitcoindev] Signing a Bitcoin Transaction with Lamport
Signatures (no changes needed)
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On 2024-05-06 06:48, Andrew Poelstra wrote:
> [...] post-Taproot script can verify a
> trace of any program execution, as long as the individual elements it
> is
> operating on fit into 4-byte CScriptNums. You can therefore implement
> SHA2, ECDSA, etc., and reconstruct the pattern of SIZE elements by
> feeding in transaction data. Which of course can then be arbitrarily
> constrained.
Thanks for your answer! I think I understand. However, we don't have
ECDSA in tapscript; all signatures in tapscript are 64 bytes plus an
optional sighash byte, so there's no natural variation in signature
size.
-Dave
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