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 cd6d27a..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
 {
@@ -58,9 +59,26 @@ namespace Novacoin
         }
 
         /// <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.");
@@ -73,7 +91,7 @@ namespace Novacoin
         ///    New items are added in this format:
         ///    hash_length_byte hash_bytes
         /// </summary>
-        /// <param name="hash">Hash160 instance</param>
+        /// <param name="hash">uint160 instance</param>
         public void AddHash(uint160 hash)
         {
             codeBytes.Add((byte)hash.Size);
@@ -85,7 +103,7 @@ namespace Novacoin
         ///    New items are added in this format:
         ///    hash_length_byte hash_bytes
         /// </summary>
-        /// <param name="hash">Hash256 instance</param>
+        /// <param name="hash">uint256 instance</param>
         public void AddHash(uint256 hash)
         {
             codeBytes.Add((byte)hash.Size);
@@ -402,7 +420,7 @@ namespace Novacoin
             // get the last item that the scriptSig
             // pushes onto the stack:
             InstructionQueue wScriptSig = scriptSig.GetInstructionQueue();
-            int nScriptSigSize = scriptSig.Size;
+            uint nScriptSigSize = scriptSig.Size;
 
             instruction opcode; // Current instruction
             byte[] pushArgs = new byte[0]; // OP_PUSHDATAn argument
@@ -501,16 +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>