added rough transaction class

.idea/workspace.xml

@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="15cb9d44-2114-4e87-9e35-a3d14b1a4bbd" name="Default" comment="">
-      <change beforePath="$PROJECT_DIR$/0.1.iml" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/src/main/java/com/buecoin01/model/Wallet.java" beforeDir="false" afterPath="$PROJECT_DIR$/src/main/java/com/buecoin01/model/Wallet.java" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/target/" />
@@ -15,11 +15,11 @@
   </component>
   <component name="FileEditorManager">
     <leaf>
-      <file leaf-file-name="Wallet.java" pinned="false" current-in-tab="false">
+      <file leaf-file-name="Wallet.java" pinned="false" current-in-tab="true">
         <entry file="file://$PROJECT_DIR$/src/main/java/com/buecoin01/model/Wallet.java">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="372">
-              <caret line="69" column="5" lean-forward="true" selection-start-line="69" selection-start-column="5" selection-end-line="69" selection-end-column="5" />
+            <state relative-caret-position="446">
+              <caret line="68" selection-start-line="68" selection-end-line="68" />
               <folding>
                 <element signature="imports" expanded="true" />
                 <element signature="e#549#550#0" expanded="true" />
@@ -29,7 +29,7 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="Blockchain.java" pinned="false" current-in-tab="true">
+      <file leaf-file-name="Blockchain.java" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/main/java/com/buecoin01/model/Blockchain.java">
           <provider selected="true" editor-type-id="text-editor">
             <state relative-caret-position="55">
@@ -219,12 +219,12 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1532353115597</updated>
-      <workItem from="1532353121145" duration="1724000" />
+      <workItem from="1532353121145" duration="2380000" />
     </task>
     <servers />
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="1724000" />
+    <option name="totallyTimeSpent" value="2380000" />
   </component>
   <component name="ToolWindowManager">
     <frame x="-57" y="-1047" width="1832" height="903" extended-state="0" />
@@ -290,10 +290,17 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/main/java/com/buecoin01/model/Blockchain.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="55">
+          <caret line="9" column="13" selection-start-line="9" selection-start-column="13" selection-end-line="9" selection-end-column="13" />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/main/java/com/buecoin01/model/Wallet.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="372">
-          <caret line="69" column="5" lean-forward="true" selection-start-line="69" selection-start-column="5" selection-end-line="69" selection-end-column="5" />
+        <state relative-caret-position="446">
+          <caret line="68" selection-start-line="68" selection-end-line="68" />
           <folding>
             <element signature="imports" expanded="true" />
             <element signature="e#549#550#0" expanded="true" />
@@ -302,13 +309,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/main/java/com/buecoin01/model/Blockchain.java">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="55">
-          <caret line="9" column="13" selection-start-line="9" selection-start-column="13" selection-end-line="9" selection-end-column="13" />
-        </state>
-      </provider>
-    </entry>
   </component>
   <component name="masterDetails">
     <states>

src/main/java/com/buecoin01/model/Transaction.java

@@ -0,0 +1,36 @@
+package com.buecoin01.model;
+
+import com.buecoin01.utility.Encryption;
+
+import java.security.PublicKey;
+import java.util.ArrayList;
+
+public class Transaction {
+    private String transactionId; //hash of the transaction
+    private PublicKey sender;
+    private PublicKey reciepient;
+    private float value;
+    private byte[] signature;
+
+    private List<TransactionInput> inputs = new ArrayList<>();
+    private List<TransactionOutput> outputs = new ArrayList<>();
+
+    private static int sequence = 0; //how many transactions have been generated
+
+    public Transaction(PublicKey from, PublicKey to, float value, ArrayList<TransactionInput> inputs) {
+        this.sender = from;
+        this.reciepient = to;
+        this.value = value;
+        this.inputs = inputs;
+    }
+
+    //generating transactionId
+    private String calculateHash() {
+        sequence++; //increasing tho avoid identical hash codes
+        return Encryption.applySha256(
+                Encryption.getStringFromKey(sender) +
+                       Encryption.getStringFromKey(reciepient) +
+                       Float.toString(value) + sequence
+                       );
+    }
+}