MIME-Version: 1.0
Date: Fri, 5 Feb 2016 15:51:08 -0500
Message-ID: <CABsx9T1Bd0-aQg-9uRa4u3dGA5fKxaj8-mEkxVzX8mhdj4Gt2g@mail.gmail.com>
From: Gavin Andresen <gavinandresen@gmail.com>
To: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
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Subject: [bitcoin-dev] BIP proposal: Increase block size limit to 2 megabytes
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This has been reviewed by merchants, miners and exchanges for a couple of
weeks, and has been implemented and tested as part of the Bitcoin Classic
and Bitcoin XT implementations.

Constructive feedback welcome; argument about whether or not it is a good
idea to roll out a hard fork now will be unproductive, so I vote we don't
go there.

Draft BIP:
  https://github.com/gavinandresen/bips/blob/bump2mb/bip-bump2mb.mediawiki

Summary:
  Increase block size limit to 2,000,000 bytes.
  After 75% hashpower support then 28-day grace period.
  With accurate sigop counting, but existing sigop limit (20,000)
  And a new, high limit on signature hashing

Blog post walking through the code:
  http://gavinandresen.ninja/a-guided-tour-of-the-2mb-fork

Blog post on a couple of the constants chosen:
  http://gavinandresen.ninja/seventyfive-twentyeight

-- 
--
Gavin Andresen

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<div dir=3D"ltr">This has been reviewed by merchants, miners and exchanges =
for a couple of weeks, and has been implemented and tested as part of the B=
itcoin Classic and Bitcoin XT implementations.<div><br></div><div>Construct=
ive feedback welcome; argument about whether or not it is a good idea to ro=
ll out a hard fork now will be unproductive, so I vote we don&#39;t go ther=
e.</div><div><br></div><div>Draft BIP:</div><div>=C2=A0=C2=A0<a href=3D"htt=
ps://github.com/gavinandresen/bips/blob/bump2mb/bip-bump2mb.mediawiki">http=
s://github.com/gavinandresen/bips/blob/bump2mb/bip-bump2mb.mediawiki</a></d=
iv><div><br></div><div>Summary: =C2=A0</div><div>=C2=A0 Increase block size=
 limit to 2,000,000 bytes.</div><div>=C2=A0 After 75% hashpower support the=
n 28-day grace period.</div><div>=C2=A0 With accurate sigop counting, but e=
xisting sigop limit (20,000)</div><div>=C2=A0 And a new, high limit on sign=
ature hashing</div><div><br></div><div>Blog post walking through the code:<=
/div><div>=C2=A0=C2=A0<a href=3D"http://gavinandresen.ninja/a-guided-tour-o=
f-the-2mb-fork">http://gavinandresen.ninja/a-guided-tour-of-the-2mb-fork</a=
><br><div><br></div><div>Blog post on a couple of the constants chosen:</di=
v><div>=C2=A0=C2=A0<a href=3D"http://gavinandresen.ninja/seventyfive-twenty=
eight">http://gavinandresen.ninja/seventyfive-twentyeight</a></div><div><br=
></div><div>-- <br><div class=3D"gmail_signature"><div dir=3D"ltr"><div dir=
=3D"ltr"><div>--<br>Gavin Andresen<br></div><div><br></div></div></div></di=
v>
</div></div></div>

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