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From: Mark Friedenbach <mark@friedenbach.org>
To: Sergio Demian Lerner <sergio.d.lerner@gmail.com>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] cleanstack alt stack & softfork improvements (Was: Merkle branch verification & tail-call semantics for generalized MAST)
Date: Fri, 22 Sep 2017 14:39:45 -0700	[thread overview]
Message-ID: <9FD4AF03-28A5-4B8A-9C12-CBCB1BC2E22C@friedenbach.org> (raw)
In-Reply-To: <CAKzdR-pnvystx5H+P+OCXm73aVmWdyesCymerSgx=pCuXx+YGA@mail.gmail.com>

You generally know the witness size to within a few bytes right before signing. Why would you not? You know the size of ECDSA signatures. You can be told the size of a hash preimage by the other party. It takes some contriving to come up with a scheme where one party has variable-length signatures of their chosing

> On Sep 22, 2017, at 2:32 PM, Sergio Demian Lerner <sergio.d.lerner@gmail.com> wrote:
> 
> But generally before one signs a transaction one does not know the signature size (which may be variable). One can only estimate the maximum size. 



  reply	other threads:[~2017-09-22 21:39 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-07  0:38 [bitcoin-dev] Merkle branch verification & tail-call semantics for generalized MAST Mark Friedenbach
2017-09-08  9:21 ` Johnson Lau
2017-09-12  2:03   ` Mark Friedenbach
2017-09-12  2:13     ` Bryan Bishop
2017-09-12  8:55     ` Johnson Lau
2017-09-12 19:57       ` Mark Friedenbach
2017-09-12 23:27         ` Karl Johan Alm
2017-09-13  9:41           ` Peter Todd
2017-09-11 20:37 ` Adán Sánchez de Pedro Crespo
2017-09-19  0:46 ` Mark Friedenbach
2017-09-19  3:09   ` [bitcoin-dev] cleanstack alt stack & softfork improvements (Was: Merkle branch verification & tail-call semantics for generalized MAST) Luke Dashjr
2017-09-19  7:33     ` Mark Friedenbach
2017-09-22 20:32       ` Sergio Demian Lerner
2017-09-22 21:11         ` Mark Friedenbach
2017-09-22 21:32           ` Sergio Demian Lerner
2017-09-22 21:39             ` Mark Friedenbach [this message]
2017-09-22 21:54               ` Sergio Demian Lerner
2017-09-22 22:07                 ` Mark Friedenbach
2017-09-22 22:09                 ` Pieter Wuille
2021-04-09  8:15                   ` [bitcoin-dev] maximum block height on transaction Erik Aronesty
2021-04-09 11:39                     ` Russell O'Connor
2021-04-09 15:54                       ` Jeremy
2021-04-12 20:04                         ` Billy Tetrud
2021-04-16  4:24                           ` ZmnSCPxj
2021-05-03  2:30                             ` ZmnSCPxj
2017-09-20  5:13     ` [bitcoin-dev] cleanstack alt stack & softfork improvements (Was: Merkle branch verification & tail-call semantics for generalized MAST) Johnson Lau
2017-09-20 19:29       ` Mark Friedenbach
2017-09-21  3:58         ` Johnson Lau
2017-09-21  4:11       ` Luke Dashjr
2017-09-21  8:02         ` Johnson Lau
2017-09-21 16:33           ` Luke Dashjr
2017-09-21 17:38             ` Johnson Lau
2017-09-30 23:23 ` [bitcoin-dev] Merkle branch verification & tail-call semantics for generalized MAST Luke Dashjr
2017-09-30 23:51   ` Mark Friedenbach
2017-10-02 17:15     ` Russell O'Connor
2017-10-28  4:40 ` Mark Friedenbach
2017-11-01  8:43   ` Luke Dashjr
2017-11-01 15:08     ` Mark Friedenbach
2017-11-04  7:59       ` Luke Dashjr

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