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From: Jeremy <jlrubin@mit.edu>
To: Bitcoin development mailing list <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] OP_SECURETHEBAG (supersedes OP_CHECKOUTPUTSVERIFY)
Date: Fri, 31 May 2019 22:35:45 -0700	[thread overview]
Message-ID: <CAD5xwhjSj82YYuQHHbwgSLvUNV2RDY0b=yMYeLj-p6j7PpS9-Q@mail.gmail.com> (raw)

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Hi All,

OP_CHECKOUTPUTSHASHVERIFY is retracted in favor of OP_SECURETHEBAG*.
OP_SECURETHEBAG does more or less the same thing, but fixes malleability
issues and lifts the single output restriction to a known number of inputs
restriction.

OP_CHECKOUTPUTSVERIFY had some issues with malleability of version and
locktime. OP_SECURETHEBAG commits to both of these values.

OP_SECURETHEBAG also lifts the restriction that OP_CHECKOUTPUTSVERIFY had
to be spent as only a single input, and instead just commits to the number
of inputs. This allows for more flexibility, but keeps it easy to get the
same single output restriction.

BIP:
https://github.com/JeremyRubin/bips/blob/op-secure-the-bag/bip-secure-the-bag.mediawiki
Implementation: https://github.com/JeremyRubin/bitcoin/tree/secure_the_bag

A particularly useful topic of discussion is how best to eliminate the
PUSHDATA and treat OP_SECURETHEBAG like a pushdata directly. I thought
about how the interpreter works and is implemented and couldn't come up
with something noninvasive.

Thank you for your review and discussion,

Jeremy

* Plus the name is better

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             reply	other threads:[~2019-06-01  5:36 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-01  5:35 Jeremy [this message]
2019-06-02  5:35 ` [bitcoin-dev] OP_SECURETHEBAG (supersedes OP_CHECKOUTPUTSVERIFY) ZmnSCPxj
2019-06-02 14:32 ` Russell O'Connor
2019-06-02 21:32   ` Jeremy
2019-06-05  9:30 ` Anthony Towns
2019-06-06  7:30   ` ZmnSCPxj
2019-06-18 20:57     ` Russell O'Connor
2019-06-20 22:05       ` Anthony Towns
2019-06-23  6:43         ` Jeremy
2019-07-08 10:26           ` Dmitry Petukhov
2019-10-03 23:22             ` Jeremy
     [not found]       ` <CAD5xwhj8o8Vbrk2KADBOFGfkD3fW3eMZo5aHJytGAj_5LLhYCg@mail.gmail.com>
2019-06-23 13:11         ` ZmnSCPxj
2019-06-24 14:34         ` Russell O'Connor
2019-06-24 18:07           ` Jeremy
2019-06-24 18:48             ` Russell O'Connor
2019-06-24 22:47               ` Jeremy
2019-06-25 17:05                 ` Russell O'Connor

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