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</o:shapelayout></xml><![endif]--></head><body lang=EN-HK link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Do you mean BIP141?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Your example is an error by BIP141:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>1*4 + 79999*1 = 80003 > 80000<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span lang=EN-US style='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=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>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> ≤ 80,000. <o:p></o:p></p><p>But the code implements:<o:p></o:p></p><p class=MsoNormal>if (nSigOps + (nWitSigOps + 3) / 4 > MAX_BLOCK_SIGOPS)<o:p></o:p></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'> ... error....<o:p></o:p></p></div><p class=MsoNormal>Which is not the same.<o:p></o:p></p></div><p class=MsoNormal><br>For example:<o:p></o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'>nSigOps = 1<br>nWitSigOps =79999<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=MsoNormal>Regards, Sergio.<o:p></o:p></p></div></div></div></div></body></html>