Subject: Re: [bitcoin-dev] Why is deriving public key from the signature not used in Segwit?

From: Gregory Maxwell <[email-masked]>
Date: Wed, 24 Jan 2018 11:35:49 +0000

On Wed, Jan 24, 2018 at 11:16 AM, Aymeric Vitte <[email-masked]> wrote:
> Then what about
> https://blockchain.info/tx/226a8b08dc46a00e9ecec5567a303a0b354bef3c1674476eb5e4b627b2ace493?format=hex
> ?
>
> Scriptsig:
>
> 473044022057a1234709270325e7215200f982546304cf465971cbd55d54231ead54ef1a7802207a82e93ef2b0f87188abe87bccb67ee9d5c650b1b58948e5b1c80ba1b4c43dc301
>
> No pubkey...

Because the pubkey is in the scriptPubKey of vout 0 of
40872a376e98a1f8b285827c2ad8c5b3eec7d779d752dc3a4adda5d9bb70f3b5 which
it is spending.