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Return-Path: <jl2012@xbt.hk>
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From: Johnson Lau <jl2012@xbt.hk>
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Date: Sat, 2 Jun 2018 02:45:57 +0800
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To: Russell O'Connor <roconnor@blockstream.io>
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Subject: Re: [bitcoin-dev] SIGHASH2 for version 1 witness programme
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--Apple-Mail=_823911B0-80AE-42F1-AA86-275875D83C8A
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> On 2 Jun 2018, at 2:15 AM, Russell O'Connor <roconnor@blockstream.io> =
wrote:
>=20
>=20
> I prefer a different opcode for CHECKSIGFROMSTACK because I dislike =
opcodes that pop a non-static number of elements off the stack. Popping =
a dynamic number of stack elements makes it more difficult to validate =
that a Script pubkey doesn't allow any funny business.
Agreed. This is one of the reasons I think we should remove =
CHECKMULTISIG in the new script system=
--Apple-Mail=_823911B0-80AE-42F1-AA86-275875D83C8A
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dus-ascii"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D""><br =
class=3D""><div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On 2 Jun 2018, at 2:15 AM, Russell O'Connor <<a =
href=3D"mailto:roconnor@blockstream.io" =
class=3D"">roconnor@blockstream.io</a>> wrote:</div><div =
class=3D""><div dir=3D"ltr" style=3D"font-family: Helvetica; font-size: =
12px; font-style: normal; font-variant-caps: normal; font-weight: =
normal; letter-spacing: normal; text-align: start; text-indent: 0px; =
text-transform: none; white-space: normal; word-spacing: 0px; =
-webkit-text-stroke-width: 0px;" class=3D""><div =
class=3D"gmail_extra"><div class=3D"gmail_quote"><br class=3D""><div =
class=3D""><br class=3D""></div><div class=3D"">I prefer a different =
opcode for CHECKSIGFROMSTACK because I dislike opcodes that pop a =
non-static number of elements off the stack. Popping a dynamic =
number of stack elements makes it more difficult to validate that a =
Script pubkey doesn't allow any funny =
business.</div></div></div></div></div></blockquote></div><br =
class=3D""><div class=3D""><br class=3D""></div><div class=3D"">Agreed. =
This is one of the reasons I think we should remove CHECKMULTISIG in the =
new script system</div></body></html>=
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