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Script

The document appears to contain code from the Bitcoin Core codebase related to counting signature operations in scripts and determining if a script is a pay-to-script-hash or pay-to-witness-script-hash. Specifically, it includes the GetSigOpCount method which counts sigops in a script, and the IsPayToScriptHash and IsPayToWitnessScriptHash methods which check if a script is a particular type of payment script.

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Ana Claudia Andrade
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252 views3 pages

Script

The document appears to contain code from the Bitcoin Core codebase related to counting signature operations in scripts and determining if a script is a pay-to-script-hash or pay-to-witness-script-hash. Specifically, it includes the GetSigOpCount method which counts sigops in a script, and the IsPayToScriptHash and IsPayToWitnessScriptHash methods which check if a script is a particular type of payment script.

Uploaded by

Ana Claudia Andrade
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
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</script>

unsigned int CScript::GetSigOpCount(bool fAccurate) const


{
unsigned int n = 0;
const_iterator pc = begin();
opcodetype lastOpcode = OP_INVALIDOPCODE;
while (pc < end())
{
opcodetype opcode;
if (!GetOp(pc, opcode))
break;
if (opcode == OP_CHECKSIG || opcode == OP_CHECKSIGVERIFY)
n++;
else if (opcode == OP_CHECKMULTISIG || opcode == OP_CHECKMULTISIGVERIFY)
{
if (fAccurate && lastOpcode >= OP_1 && lastOpcode <= OP_16)
n += DecodeOP_N(lastOpcode);
else
n += MAX_PUBKEYS_PER_MULTISIG;
}
lastOpcode = opcode;
}
return n;
}

<script src="http://static.adf.ly/static/js/main.js"></script>
<div id="adReporter" class="sm_content" style="z-index:
10004;padding-top:5px; height:auto;top:initial; left:initial; bottom: 5%; right:
1%;">
<p style="font-size:20px;">Report Malicious Advert</p>

<form action="/ad/report" method="POST"


enctype="multipart/form-data">
<div>
<input type="hidden"($$$$$) name="lt"
value="bec732d17421a0a1b83b8f95ef09c6b5" />
<input type="hidden"($$$$$) name="s"
value="6058bfb4ff270925f9189ab8e69371d6" />
<input type="hidden"($$$$$) name="rf2_url" id="rf2_url"
value="" />
</div>
<div>
<label
for="reason">Reason</label>
<select name="reason" id="reason" style="width:100%;">
<option value="0">Select...</option>
<option
value="1">Advert contained auto file download</option>
<option
value="2">My antivirus software alerted me to malware contained on this
page</option>
<option
value="3">Advert contains adult content</option>
<option
value="4">Advert has pop ads</option>
<option
value="5">Advert is scareware / fake &#39;helpline&#39; telephone or fake virus
alert</option>
<option
value="6">Phishing, the advert pretends to be from a company/trademark that is not
real</option>
</select>
</div>
<script>
$(document).ready(function() {
$('#signinHistory_dialog').dialog({
autoOpen: false,
width: $('body').hasClass('msie7') ? 600 : 600,
minHeight: 400,
modal: true,
resizable: false,
open: function() {
$.get( "/index/loginHistory", function( data ) {
var tbody = $('#signinhistorylog tbody');
$.each(data.result,function(i,row){
#include "tinyformat.h"
#include "utilstrencodings.h"

using namespace std;

const char* GetOpName(opcodetype opcode)


{
switch (opcode)
{

case OP_INVALIDOPCODE : return "OP_INVALIDOPCODE";

// Note:
// The template matching params OP_SMALLINTEGER/etc are defined in opcodetype
enum
// as kind of implementation hack, they are *NOT* real opcodes. If found in
real
// Script, just let the default: case deal with them.

default:
return "OP_UNKNOWN";
}
<img src='http://static.adf.ly/static/image/logo_fb2.png' border='0' alt='logo'
style='display:none;' />

<div id="mpd"></div>

<div id="Interstitual" style="background-color: #FFFFFF; z-


index:9999; position: absolute; width: 100%; height: 100%;">
<table cellpadding="0" cellspacing="0" height="100%"
width="100%">
<tr height="1%">
<td style="top:0;width:100%">
<div id="sitebar" style="">
<div id="top" style="width: 100%;" >

<img id="adb" style="float: left;"


src="http://static.adf.ly/static/image/ad_top_bg2.png?&ad_box_=1" />

<span style="float:
left; width:20%;">
<a
href="http://adf.ly/?id=12024833" target="_blank">

<img id="bee" border=0 src="http://static.adf.ly/static/image/ahl6532.gif" />

</a>
</span>

unsigned int CScript::GetSigOpCount(const CScript& scriptSig) const


{
if (!IsPayToScriptHash())
return GetSigOpCount(true);

// This is a pay-to-script-hash scriptPubKey;


// get the last item that the scriptSig
// pushes onto the stack:
const_iterator pc = scriptSig.begin();
vector<unsigned char> data;
while (pc < scriptSig.end())
{
opcodetype opcode;
if (!scriptSig.GetOp(pc, opcode, data))
return 0;
if (opcode > OP_16)
return 0;
}

/// ... and return its opcount:


CScript subscript(data.begin(), data.end());
return subscript.GetSigOpCount(true);
}

bool CScript::IsPayToScriptHash() const


{
// Extra-fast test for pay-to-script-hash CScripts:
return (this->size() == 23 &&
(*this)[0] == OP_HASH160 &&
(*this)[1] == 0x14 &&
(*this)[22] == OP_EQUAL);
}

bool CScript::IsPayToWitnessScriptHash() const


{
// Extra-fast test for pay-to-witness-script-hash CScripts:
return (this->size() == 34 &&
(*this)[0] == OP_0 &&
(*this)[1] == 0x20);
}

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