Enforce rule that the coinbase starts with serialized block height.

[NovacoinLibrary.git] / Novacoin / CScript.cs

diff --git a/Novacoin/CScript.cs b/Novacoin/CScript.cs
index e2e17e0..abdad9c 100644 (file)
--- a/Novacoin/CScript.cs
+++ b/Novacoin/CScript.cs
@@ -21,6 +21,7 @@ using System.Linq;
 using System.Text;
 using System.Collections.Generic;
 using System.Diagnostics.Contracts;
+using System.Numerics;
 
 namespace Novacoin
 {
@@ -52,15 +53,32 @@ namespace Novacoin
         /// Return a new instance of ByteQueue object for current code bytes
         /// </summary>
         /// <returns></returns>
-        public ByteQueue GetByteQueue()
+        public InstructionQueue GetInstructionQueue()
         {
-             return new ByteQueue(codeBytes);
+             return new InstructionQueue(ref codeBytes);
+        }
+
+        /// <summary>
+        /// Add serialized number to instructions list.
+        /// </summary>
+        /// <param name="n">Number to add.</param>
+        public void AddNumber(int n)
+        {
+            if (n == -1 || (n >= 1 && n <= 16))
+            {
+                codeBytes.Add((byte)ScriptCode.EncodeOP_N(n, true));
+            }
+            else
+            {
+                BigInteger bn = n;
+                PushData(bn.ToByteArray());
+            }
         }
 
         /// <summary>
         /// Adds specified operation to instruction list
         /// </summary>
-        /// <param name="opcode"></param>
+        /// <param name="opcode">Instruction to add.</param>
         public void AddInstruction(instruction opcode)
         {
             Contract.Requires<ArgumentException>(opcode >= instruction.OP_0 && opcode <= instruction.OP_INVALIDOPCODE, "Invalid instruction.");
@@ -73,10 +91,10 @@ namespace Novacoin
         ///    New items are added in this format:
         ///    hash_length_byte hash_bytes
         /// </summary>
-        /// <param name="hash">Hash160 instance</param>
-        public void AddHash(Hash160 hash)
+        /// <param name="hash">uint160 instance</param>
+        public void AddHash(uint160 hash)
         {
-            codeBytes.Add((byte)hash.hashSize);
+            codeBytes.Add((byte)hash.Size);
             codeBytes.AddRange((byte[])hash);
         }
 
@@ -85,10 +103,10 @@ namespace Novacoin
         ///    New items are added in this format:
         ///    hash_length_byte hash_bytes
         /// </summary>
-        /// <param name="hash">Hash256 instance</param>
-        public void AddHash(Hash256 hash)
+        /// <param name="hash">uint256 instance</param>
+        public void AddHash(uint256 hash)
         {
-            codeBytes.Add((byte)hash.hashSize);
+            codeBytes.Add((byte)hash.Size);
             codeBytes.AddRange((byte[])hash);
         }
 
@@ -157,7 +175,7 @@ namespace Novacoin
             }
 
             var count = 0;
-            var bq1 = new ByteQueue(codeBytes);
+            var bq1 = new InstructionQueue(ref codeBytes);
 
             byte[] pushData;
             instruction opcode;
@@ -203,7 +221,7 @@ namespace Novacoin
 
             var count = 0;
             var newScript = new CScript();
-            var bq1 = new ByteQueue(codeBytes);
+            var bq1 = new InstructionQueue(ref codeBytes);
 
             while (ScriptCode.GetOp(ref bq1, out opcode, out pushData))
             {
@@ -239,7 +257,7 @@ namespace Novacoin
         {
             get
             {
-                var wCodeBytes = new ByteQueue(codeBytes);
+                var wCodeBytes = new InstructionQueue(ref codeBytes);
 
                 instruction opcode; // Current instruction
                 byte[] pushArgs; // OP_PUSHDATAn argument
@@ -265,7 +283,7 @@ namespace Novacoin
         {
             get
             {
-                var wCodeBytes = new ByteQueue(codeBytes);
+                var wCodeBytes = new InstructionQueue(ref codeBytes);
 
                 byte[] pushArgs; // OP_PUSHDATAn argument
                 instruction opcode; // Current instruction
@@ -352,14 +370,14 @@ namespace Novacoin
         /// </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 InstructionQueue(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
@@ -373,7 +391,7 @@ namespace Novacoin
                 {
                     if (fAccurate && lastOpcode >= instruction.OP_1 && lastOpcode <= instruction.OP_16)
                     {
-                        nCount += ScriptCode.DecodeOP_N(lastOpcode);
+                        nCount += (uint)ScriptCode.DecodeOP_N(lastOpcode);
                     }
                     else
                     {
@@ -391,7 +409,7 @@ namespace Novacoin
         /// </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)
             {
@@ -401,13 +419,20 @@ namespace Novacoin
             // This is a pay-to-script-hash scriptPubKey;
             // get the last item that the scriptSig
             // pushes onto the stack:
-            ByteQueue wScriptSig = scriptSig.GetByteQueue();
+            InstructionQueue wScriptSig = scriptSig.GetInstructionQueue();
+            uint 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;
@@ -494,16 +519,25 @@ namespace Novacoin
         }
 
         /// <summary>
+        /// Implicit cast of byte array to CScript.
+        /// </summary>
+        /// <param name="scriptBytes"></param>
+        public static implicit operator CScript(byte[] scriptBytes)
+        {
+            return new CScript(scriptBytes);
+        }
+
+        /// <summary>
         /// Script size
         /// </summary>
-        public int Size
+        public uint Size
         {
-            get { return codeBytes.Count; }
+            get { return (uint) codeBytes.Count; }
         }
 
         public CScriptID ScriptID
         {
-            get { return new CScriptID(Hash160.Compute160(codeBytes.ToArray())); }
+            get { return new CScriptID(CryptoUtils.ComputeHash160(codeBytes.ToArray())); }
         }
 
         /// <summary>
@@ -513,7 +547,7 @@ namespace Novacoin
                public override string ToString()
                {
                        var sb = new StringBuilder();
-            var wCodeBytes = new ByteQueue(codeBytes);
+            var wCodeBytes = new InstructionQueue(ref codeBytes);
 
             instruction opcode; // Current instruction
             byte[] pushArgs; // OP_PUSHDATAn argument