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To: "'Sergio Demian Lerner'" <sergio.d.lerner@gmail.com>
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Subject: Re: [bitcoin-dev] BIP147 minor error
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Do you mean BIP141?
=20
Your example is an error by BIP141:
=20
1*4 + 79999*1 =3D 80003 > 80000
=20
From: bitcoin-dev-bounces@lists.linuxfoundation.org =
[mailto:bitcoin-dev-bounces@lists.linuxfoundation.org] On Behalf Of =
Sergio Demian Lerner via bitcoin-dev
Sent: Monday, 21 March, 2016 10:51
To: bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] BIP147 minor error
=20
The BIP147 reads:
Sigop cost is defined. The cost of a sigop in traditional script is 4, =
while the cost of a sigop in witness program is 1.=20
The new rule is total sigop cost =E2=89=A4 80,000.=20
But the code implements:
if (nSigOps + (nWitSigOps + 3) / 4 > MAX_BLOCK_SIGOPS)
... error....
Which is not the same.
For example:
nSigOps =3D 1
nWitSigOps =3D79999
Is not an error by BIP definition but it's an error by the implemented =
code.
Regards, Sergio.
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-HK =
link=3D"#0563C1" vlink=3D"#954F72"><div class=3DWordSection1><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Do you mean =
BIP141?<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>Your example =
is an error by BIP141:<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>1*4 + =
79999*1 =3D 80003 > 80000<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </=
o:p></span></p><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span><=
/b><span lang=3DEN-US =
style=3D'font-size:11.0pt;font-family:"Calibri",sans-serif'> =
bitcoin-dev-bounces@lists.linuxfoundation.org =
[mailto:bitcoin-dev-bounces@lists.linuxfoundation.org] <b>On Behalf Of =
</b>Sergio Demian Lerner via bitcoin-dev<br><b>Sent:</b> Monday, 21 =
March, 2016 10:51<br><b>To:</b> bitcoin-dev =
<bitcoin-dev@lists.linuxfoundation.org><br><b>Subject:</b> =
[bitcoin-dev] BIP147 minor error<o:p></o:p></span></p><p =
class=3DMsoNormal><o:p> </o:p></p><div><div><div><p =
class=3DMsoNormal>The BIP147 reads:<o:p></o:p></p><p><i>Sigop cost</i> =
is defined. The cost of a sigop in traditional script is 4, while the =
cost of a sigop in witness program is 1. <o:p></o:p></p><p>The new rule =
is total <i>sigop cost</i> =E2=89=A4 80,000. <o:p></o:p></p><p>But the =
code implements:<o:p></o:p></p><p class=3DMsoNormal>if (nSigOps + =
(nWitSigOps + 3) / 4 > MAX_BLOCK_SIGOPS)<o:p></o:p></p></div><div><p =
class=3DMsoNormal style=3D'margin-bottom:12.0pt'> ... =
error....<o:p></o:p></p></div><p class=3DMsoNormal>Which is not the =
same.<o:p></o:p></p></div><p class=3DMsoNormal><br>For =
example:<o:p></o:p></p><div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'>nSigOps =3D 1<br>nWitSigOps =
=3D79999<br><br>Is not an error by BIP definition but it's an error by =
the implemented code.<o:p></o:p></p></div><div><p =
class=3DMsoNormal>Regards, =
Sergio.<o:p></o:p></p></div></div></div></div></body></html>
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