[bitcoin-dev] Two questions about segwit implementation

Pieter Wuille pieter.wuille at gmail.com
Sun May 26 17:54:08 UTC 2019

On Sun, May 26, 2019, 07:07 Aymeric Vitte via bitcoin-dev <
bitcoin-dev at lists.linuxfoundation.org> wrote:

> I realized recently that my segwit implementation was not correct,
> basically some time ago, wrongly reading the specs (and misleaded by
> what follows), I thought that scriptsig would go into witness data as it
> was, but that's not the case, op_pushdata is replaced by varlen
> Now reading correctly the specs, they seem to be not totally correct,
> then the first question is: why OP_0 is 00 in witness data and not 0100?
> Does this apply to other op_codes? This does not look logical at all
> The second question is: why for non segwit inputs there is a 00 length
> in segwit data, what is the rational for that? It should just be nothing
> since you don't need this to reconciliate things

This is a question that belongs on https://bitcoin.stackexchange.com, not
this list.


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