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In-Reply-To: <6b8f2a91-af73-4d66-1b90-51acd4ce217c@gmail.com>
From: Pieter Wuille <pieter.wuille@gmail.com>
Date: Thu, 2 May 2019 16:35:06 -0700
Message-ID: <CAPg+sBgDEMfeh_17q++EANOu9T4fcf49kJdi4rT8vRqQQkmdHA@mail.gmail.com>
To: Aymeric Vitte <vitteaymeric@gmail.com>, 
	Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Content-Type: text/plain; charset="UTF-8"
Subject: Re: [bitcoin-dev] IsStandard
Precedence: list

On Thu, 2 May 2019 at 16:28, Aymeric Vitte via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org> wrote:
>
> Thanks for the answer, indeed for the redeem script and someone
> attempting a 0/1 of 3, good example
>
> So to summarize everything is standard as long as it matches P2PKH,
> P2SH, P2WPKH or P2WSH , the redeem scripts for the sha bounties are in
> op_return

Generally, all spends of P2SH/P2WSH is standard, with the following exceptions:
* Non-push operations in the scriptSig
* Resource limitations (too large scripts or items on the stack)
* Protections against known attack vectors (low s rule, cleanstack
rule, minimally encoded numbers rule, codesep usage, ...)
* Usage of unconditionally spendable constructions intended for future
extensions, such as spending future segwit versions.

Cheers,

-- 
Pieter