using System.Linq;
using System.Text;
using System.Collections.Generic;
+using System.Diagnostics.Contracts;
namespace Novacoin
{
- public class CScriptException : Exception
- {
- public CScriptException()
- {
- }
-
- public CScriptException(string message)
- : base(message)
- {
- }
-
- public CScriptException(string message, Exception inner)
- : base(message, inner)
- {
- }
- }
-
/// <summary>
/// Representation of script code
/// </summary>
/// Return a new instance of ByteQueue object for current code bytes
/// </summary>
/// <returns></returns>
- public ByteQueue GetByteQUeue()
+ public ByteQueue GetByteQueue()
{
- return new ByteQueue(codeBytes);
+ return new ByteQueue(ref codeBytes);
}
/// <summary>
/// <param name="opcode"></param>
public void AddInstruction(instruction opcode)
{
- if (opcode < instruction.OP_0 || opcode > instruction.OP_INVALIDOPCODE)
- {
- throw new CScriptException("CScript::AddInstruction() : invalid instruction");
- }
+ Contract.Requires<ArgumentException>(opcode >= instruction.OP_0 && opcode <= instruction.OP_INVALIDOPCODE, "Invalid instruction.");
codeBytes.Add((byte)opcode);
}
public void AddHash(Hash160 hash)
{
codeBytes.Add((byte)hash.hashSize);
- codeBytes.AddRange(hash.hashBytes);
+ codeBytes.AddRange((byte[])hash);
}
/// <summary>
public void AddHash(Hash256 hash)
{
codeBytes.Add((byte)hash.hashSize);
- codeBytes.AddRange(hash.hashBytes);
+ codeBytes.AddRange((byte[])hash);
}
/// <summary>
}
else if (nCount < 0xffff)
{
- // OP_PUSHDATA1 0x00 0x01 [0x5a]
+ // OP_PUSHDATA1 0x01 0x00 [0x5a]
codeBytes.Add((byte)instruction.OP_PUSHDATA2);
- var szBytes = Interop.BEBytes((ushort)nCount);
+ var szBytes = BitConverter.GetBytes((ushort)nCount);
codeBytes.AddRange(szBytes);
}
else if (nCount < 0xffffffff)
{
- // OP_PUSHDATA1 0x00 0x00 0x00 0x01 [0x5a]
+ // OP_PUSHDATA1 0x01 0x00 0x00 0x00 [0x5a]
codeBytes.Add((byte)instruction.OP_PUSHDATA4);
- var szBytes = Interop.BEBytes((uint)nCount);
+ var szBytes = BitConverter.GetBytes((uint)nCount);
codeBytes.AddRange(szBytes);
}
}
/// <summary>
+ /// Just insert data array without including any prefixes. Please make sure that you know what you're doing,
+ /// it is recommended to use AddInstruction, AddHash or PushData instead.
+ /// </summary>
+ /// <param name="dataBytes">Data bytes</param>
+ public void AddRawData(byte[] dataBytes)
+ {
+ // Add data bytes
+ codeBytes.AddRange(dataBytes);
+ }
+
+ /// <summary>
/// Scan pushed data bytes for pattern and, in case of exact match, remove it.
/// </summary>
/// <param name="pattern">Pattern sequence</param>
/// <returns>Matches count</returns>
public int RemovePattern(byte[] pattern)
{
- // There is no sense to continue if pattern is longer than script itself
+ // There is no sense to continue if pattern is empty or longer than script itself
if (pattern.Length == 0 || pattern.Length > codeBytes.Count)
{
return 0;
}
var count = 0;
- var bq1 = new ByteQueue(codeBytes);
-
+ var bq1 = new ByteQueue(ref codeBytes);
byte[] pushData;
instruction opcode;
}
}
- codeBytes = newScript.codeBytes;
+ if (count > 0)
+ {
+ // Replace current script if any matches were found
+ codeBytes = newScript.codeBytes;
+ }
return count;
}
/// <returns>Matches count</returns>
public int RemoveInstruction(instruction op)
{
- var count = 0;
- var bq1 = new ByteQueue(codeBytes);
-
-
byte[] pushData;
instruction opcode;
+ var count = 0;
var newScript = new CScript();
+ var bq1 = new ByteQueue(ref codeBytes);
while (ScriptCode.GetOp(ref bq1, out opcode, out pushData))
{
- if (pushData.Length != 0)
+ if (pushData.Length != 0 && op != opcode)
{
+ // If instruction didn't match then push its data again
newScript.PushData(pushData);
}
else if (Enum.IsDefined(typeof(instruction), op) && op != opcode)
{
+ // Instruction didn't match
newScript.AddInstruction(opcode);
}
else
}
}
- codeBytes = newScript.codeBytes;
+ if (count > 0)
+ {
+ // Replace current script if any matches were found
+ codeBytes = newScript.codeBytes;
+ }
return count;
}
{
get
{
- var wCodeBytes = new ByteQueue(codeBytes);
+ var wCodeBytes = new ByteQueue(ref codeBytes);
instruction opcode; // Current instruction
byte[] pushArgs; // OP_PUSHDATAn argument
{
get
{
- var wCodeBytes = new ByteQueue(codeBytes);
+ var wCodeBytes = new ByteQueue(ref codeBytes);
byte[] pushArgs; // OP_PUSHDATAn argument
instruction opcode; // Current instruction
/// </summary>
/// <param name="fAccurate">Legacy mode flag</param>
/// <returns>Amount of sigops</returns>
- public int GetSigOpCount(bool fAccurate)
+ public uint GetSigOpCount(bool fAccurate)
{
- var wCodeBytes = new ByteQueue(codeBytes);
+ var wCodeBytes = new ByteQueue(ref codeBytes);
instruction opcode; // Current instruction
byte[] pushArgs; // OP_PUSHDATAn argument
- int nCount = 0;
+ uint nCount = 0;
var lastOpcode = instruction.OP_INVALIDOPCODE;
// Scan instructions sequence
{
if (fAccurate && lastOpcode >= instruction.OP_1 && lastOpcode <= instruction.OP_16)
{
- nCount += ScriptCode.DecodeOP_N(lastOpcode);
+ nCount += (uint)ScriptCode.DecodeOP_N(lastOpcode);
}
else
{
/// </summary>
/// <param name="scriptSig">pay-to-script-hash scriptPubKey</param>
/// <returns>SigOps count</returns>
- public int GetSigOpCount(CScript scriptSig)
+ public uint GetSigOpCount(CScript scriptSig)
{
if (!IsPayToScriptHash)
{
// This is a pay-to-script-hash scriptPubKey;
// get the last item that the scriptSig
// pushes onto the stack:
- ByteQueue wScriptSig = scriptSig.GetByteQUeue();
+ ByteQueue wScriptSig = scriptSig.GetByteQueue();
+ int nScriptSigSize = scriptSig.Size;
instruction opcode; // Current instruction
- byte[] pushArgs; // OP_PUSHDATAn argument
+ byte[] pushArgs = new byte[0]; // OP_PUSHDATAn argument
+
- while (ScriptCode.GetOp(ref wScriptSig, out opcode, out pushArgs))
+ while (wScriptSig.Index < nScriptSigSize)
{
+ if (!ScriptCode.GetOp(ref wScriptSig, out opcode, out pushArgs))
+ {
+ return 0;
+ }
+
if (opcode > instruction.OP_16)
{
return 0;
public void SetDestination(CPubKey pubKey)
{
codeBytes.Clear();
- PushData(pubKey.PublicBytes);
+ PushData(pubKey);
AddInstruction(instruction.OP_CHECKSIG);
}
foreach (var key in keys)
{
- PushData(key.PublicBytes);
+ PushData(key);
}
AddInstruction(ScriptCode.EncodeOP_N(keys.Length));
/// <summary>
/// Access to script code.
/// </summary>
- public byte[] Bytes
+ public static implicit operator byte[] (CScript script)
+ {
+ return script.codeBytes.ToArray();
+ }
+
+ /// <summary>
+ /// Script size
+ /// </summary>
+ public int Size
{
- get { return codeBytes.ToArray(); }
+ get { return codeBytes.Count; }
}
public CScriptID ScriptID
public override string ToString()
{
var sb = new StringBuilder();
- var wCodeBytes = new ByteQueue(codeBytes);
+ var wCodeBytes = new ByteQueue(ref codeBytes);
instruction opcode; // Current instruction
byte[] pushArgs; // OP_PUSHDATAn argument
git://git.novaco.in / NovacoinLibrary.git / blobdiff