Add license header.

[NovacoinLibrary.git] / Novacoin / CTxOut.cs

diff --git a/Novacoin/CTxOut.cs b/Novacoin/CTxOut.cs
index 8ac5c7c..2d4d756 100644 (file)
--- a/Novacoin/CTxOut.cs
+++ b/Novacoin/CTxOut.cs
@@ -1,5 +1,24 @@
-\feffusing System;
+\feff/**
+ *  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;
 
 namespace Novacoin
 {
@@ -11,21 +30,107 @@ namespace Novacoin
                /// <summary>
                /// Input value.
                /// </summary>
-               public ulong nValue = 0;
+        public long nValue = -1;
 
                /// <summary>
                /// Second half of script which contains spending instructions.
                /// </summary>
-               public byte[] scriptPubKey;
+        public CScript scriptPubKey;
 
-               public CTxOut ()
-               {
-               }
+        /// <summary>
+        /// Initialize new CTxOut instance as a copy of another instance.
+        /// </summary>
+        /// <param name="o">CTxOut instance.</param>
+        public CTxOut(CTxOut o)
+        {
+            nValue = o.nValue;
+            scriptPubKey = o.scriptPubKey;
+        }
+
+        /// <summary>
+        /// Initialize an empty instance of CTxOut class
+        /// </summary>
+        public CTxOut()
+        {
+            SetEmpty();
+        }
+
+        /// <summary>
+        /// Read vout list from byte sequence.
+        /// </summary>
+        /// <param name="wBytes">Reference to byte sequence</param>
+        /// <returns>Outputs array</returns>
+        public static CTxOut[] ReadTxOutList(ref ByteQueue wBytes)
+        {
+            int nOutputs = (int)wBytes.GetVarInt();
+            CTxOut[] vout =new CTxOut[nOutputs];
+
+            for (int nIndex = 0; nIndex < nOutputs; nIndex++)
+            {
+                // Fill outputs array
+                vout[nIndex] = new CTxOut();
+                vout[nIndex].nValue = BitConverter.ToUInt32(wBytes.Get(8), 0);
+
+                int nScriptPKLen = (int)wBytes.GetVarInt();
+                vout[nIndex].scriptPubKey = new CScript(wBytes.Get(nScriptPKLen));
+            }
+
+            return vout;
+        }
+
+        /// <summary>
+        /// Get raw bytes representation of our output.
+        /// </summary>
+        /// <returns>Byte sequence.</returns>
+        public IList<byte> Bytes
+        {
+            get
+            {
+                List<byte> resultBytes = new List<byte>();
+
+                resultBytes.AddRange(BitConverter.GetBytes(nValue)); // txout value
+
+                List<byte> s = new List<byte>(scriptPubKey.Bytes);
+
+                resultBytes.AddRange(VarInt.EncodeVarInt(s.Count)); // scriptPubKey length
+                resultBytes.AddRange(s); // scriptPubKey
+
+                return resultBytes;
+            }
+        }
+
+        /// <summary>
+        /// Null prevouts have -1 value
+        /// </summary>
+        public void SetNull()
+        {
+            nValue = -1;
+            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 == -1); }
+        }
+
+        public bool IsEmpty
+        {
+           get { return nValue == 0 && scriptPubKey.IsNull; }
+        }
 
                public override string ToString ()
                {
                        StringBuilder sb = new StringBuilder ();
-                       sb.AppendFormat ("CTxOut(nValue={0},scriptPubKey={1}", nValue, scriptPubKey.ToString());
+                       sb.AppendFormat ("CTxOut(nValue={0}, scriptPubKey={1})", nValue, scriptPubKey.ToString());
 
                        return sb.ToString ();
                }