X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FCTxOut.cs;h=3017feae4e8a21e925f7982e74dd82bf5db9b615;hb=ced87004f5e3d01ccb655b690289df227f3f87bf;hp=920fcd5f95f6b341067d8184c345d73c5d724874;hpb=3887c570113ea13d39c3e5c79d6adeda56b4b461;p=NovacoinLibrary.git

diff --git a/Novacoin/CTxOut.cs b/Novacoin/CTxOut.cs
index 920fcd5..3017fea 100644
--- a/Novacoin/CTxOut.cs
+++ b/Novacoin/CTxOut.cs
@@ -1,6 +1,25 @@
-using System;
+/**
+ *  Novacoin classes library
+ *  Copyright (C) 2015 Alex D. (balthazar.ad@gmail.com)
+
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Affero General Public License for more details.
+
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+using System;
 using System.Text;
 using System.Collections.Generic;
+using System.IO;
 
 namespace Novacoin
 {
@@ -12,7 +31,7 @@ namespace Novacoin
 		/// <summary>
 		/// Input value.
 		/// </summary>
-        public ulong nValue;
+        public ulong nValue = ulong.MaxValue;
 
 		/// <summary>
 		/// Second half of script which contains spending instructions.
@@ -20,6 +39,17 @@ namespace Novacoin
         public CScript scriptPubKey;
 
         /// <summary>
+        /// Initialize new outpoint using provided value and script.
+        /// </summary>
+        /// <param name="nValue">Input value</param>
+        /// <param name="scriptPubKey">Spending instructions.</param>
+        public CTxOut(ulong nValue, CScript scriptPubKey)
+        {
+            this.nValue = nValue;
+            this.scriptPubKey = scriptPubKey;
+        }
+
+        /// <summary>
         /// Initialize new CTxOut instance as a copy of another instance.
         /// </summary>
         /// <param name="o">CTxOut instance.</param>
@@ -34,56 +64,137 @@ namespace Novacoin
         /// </summary>
         public CTxOut()
         {
-            scriptPubKey = new CScript();
+            SetEmpty();
         }
 
         /// <summary>
         /// Read vout list from byte sequence.
         /// </summary>
-        /// <param name="wBytes">Reference to byte sequence</param>
+        /// <param name="wBytes">Reference to binary reader</param>
         /// <returns>Outputs array</returns>
-        public static CTxOut[] ReadTxOutList(ref WrappedList<byte> wBytes)
+        internal static CTxOut[] ReadTxOutList(ref BinaryReader reader)
         {
-            int nOutputs = (int)VarInt.ReadVarInt(ref wBytes);
-            CTxOut[] vout =new CTxOut[nOutputs];
+            int nOutputs = (int)VarInt.ReadVarInt(ref reader);
+            var vout =new CTxOut[nOutputs];
 
             for (int nIndex = 0; nIndex < nOutputs; nIndex++)
             {
                 // Fill outputs array
                 vout[nIndex] = new CTxOut();
-                vout[nIndex].nValue = BitConverter.ToUInt32(wBytes.GetItems(8), 0);
+                vout[nIndex].nValue = reader.ReadUInt64();
 
-                int nScriptPKLen = (int)VarInt.ReadVarInt(ref wBytes);
-                vout[nIndex].scriptPubKey = new CScript(wBytes.GetItems(nScriptPKLen));
+                int nScriptPKLen = (int)VarInt.ReadVarInt(ref reader);
+                vout[nIndex].scriptPubKey = new CScript(reader.ReadBytes(nScriptPKLen));
             }
 
             return vout;
         }
 
         /// <summary>
+        /// Deserialize outputs array.
+        /// </summary>
+        /// <param name="outBytes">Byte array</param>
+        /// <returns>Outputs array</returns>
+        public static CTxOut[] DeserializeOutputsArray(byte[] outBytes)
+        {
+            var stream = new MemoryStream(outBytes);
+            var reader = new BinaryReader(stream);
+
+            CTxOut[] result = ReadTxOutList(ref reader);
+
+            reader.Close();
+
+            return result;
+        }
+
+        /// <summary>
+        /// Create serialized representation of outputs array.
+        /// </summary>
+        /// <param name="vout">Outputs array</param>
+        /// <returns>Byte array</returns>
+        public static byte[] SerializeOutputsArray(CTxOut[] vout)
+        {
+            var stream = new MemoryStream();
+            var writer = new BinaryWriter(stream);
+
+            writer.Write(VarInt.EncodeVarInt(vout.Length));
+
+            foreach (var o in vout)
+            {
+                writer.Write(o);
+            }
+
+            var resultBytes = stream.ToArray();
+
+            writer.Close();
+
+            return resultBytes;
+        }
+
+
+        /// <summary>
         /// Get raw bytes representation of our output.
         /// </summary>
         /// <returns>Byte sequence.</returns>
-        public IList<byte> Bytes
+        public static implicit operator byte[] (CTxOut output)
         {
-            get
-            {
-                List<byte> resultBytes = new List<byte>();
+            var stream = new MemoryStream();
+            var writer = new BinaryWriter(stream);
 
-                resultBytes.AddRange(BitConverter.GetBytes(nValue)); // txout value
+            writer.Write(output.nValue); // txout value
+            writer.Write(VarInt.EncodeVarInt(output.scriptPubKey.Size)); // scriptPubKey length
+            writer.Write(output.scriptPubKey);  // scriptPubKey
 
-                List<byte> s = new List<byte>(scriptPubKey.Bytes);
+            var resultBytes = stream.ToArray();
 
-                resultBytes.AddRange(VarInt.EncodeVarInt(s.Count)); // scriptPubKey length
-                resultBytes.AddRange(s); // scriptPubKey
+            writer.Close();
 
-                return resultBytes;
+            return resultBytes;
+        }
+
+        /// <summary>
+        /// Null prevouts have -1 value
+        /// </summary>
+        public void SetNull()
+        {
+            nValue = ulong.MaxValue;
+            scriptPubKey = new CScript();
+        }
+
+        /// <summary>
+        /// Empty outputs have zero value and empty scriptPubKey
+        /// </summary>
+        public void SetEmpty()
+        {
+            nValue = 0;
+            scriptPubKey = new CScript();
+        }
+
+        public bool IsNull
+        {
+            get { return (nValue == ulong.MaxValue); }
+        }
+
+        public bool IsEmpty
+        {
+           get { return nValue == 0 && scriptPubKey.IsNull; }
+        }
+
+        /// <summary>
+        /// Serialized size
+        /// </summary>
+        public int Size
+        {
+            get
+            {
+                var nScriptSize = scriptPubKey.Size;
+                return 8 + VarInt.GetEncodedSize(nScriptSize) + nScriptSize;
             }
         }
 
-		public override string ToString ()
+        public override string ToString ()
 		{
-			StringBuilder sb = new StringBuilder ();
+			var sb = new StringBuilder ();
 			sb.AppendFormat ("CTxOut(nValue={0}, scriptPubKey={1})", nValue, scriptPubKey.ToString());
 
 			return sb.ToString ();