created the ui for showing the tables and showing all the pending transactions on the table, mining all the pending transactions and clearing the memory, for now created the mining structure

Author: code-architect

blockchain/blockchain.py

@@ -1,3 +1,4 @@
+from uuid import uuid4
 from Crypto.Hash import SHA
 from Crypto.PublicKey import RSA
 from flask import Flask, render_template, jsonify, request
@@ -8,12 +9,14 @@
 from Crypto.Signature import PKCS1_v1_5
 
 MINING_SENDER = "blockchain"
+MINING_REWARD = 1
 
 
 class Blockchain:
     def __init__(self):
         self.transactions = []
         self.chain = []
+        self.node_id = str(uuid4()).replace('-', '')
         # create the genesis block
         self.create_block(0, '00')
 
@@ -31,6 +34,7 @@ def create_block(self, nonce, previous_hash):
         # reset the current list of transactions
         self.transactions = []
         self.chain.append(block)
+        return block
 
     def verify_transaction_signature(self, sender_public_key, signature, transaction):
         public_key = RSA.importKey(binascii.unhexlify(sender_public_key))
@@ -42,6 +46,12 @@ def verify_transaction_signature(self, sender_public_key, signature, transaction
         except ValueError:
             return False
 
+    def proof_of_work(self):
+        return 123
+
+    def hash(self, block):
+        return 'abs'
+
     def submit_transaction(self, sender_public_key, recipient_public_key, signature, amount):
         # Signature validation
         transaction = OrderedDict({
@@ -83,13 +93,33 @@ def get_transactions():
     return jsonify(response), 200
 
 
+@app.route("/mine", methods=['GET'])
+def mine():
+    # We run the proof of work algo
+    nonce = blockchain.proof_of_work()
+    blockchain.submit_transaction(sender_public_key=MINING_SENDER, recipient_public_key=blockchain.node_id,
+                                  signature='', amount=MINING_REWARD)
+    last_block = blockchain.chain[-1]
+    previous_hash = blockchain.hash(last_block)
+    block = blockchain.create_block(nonce, previous_hash)
+    response = {
+        "message": "New block created",
+        "block_number": block["block_number"],
+        "transactions": block["transactions"],
+        "nonce": block["nonce"],
+        "previous_hash": block["previous_hash"],
+    }
+    return jsonify(response), 201
+
+
 @app.route("/transactions_new", methods=['POST'])
 def transactions_new():
     values = request.form
 
     # check required fields [Notes: This is just a demo, not production code, so not checking thoroughly, just doing
     # basic checks]
-    required = ['confirmation_sender_public_key', 'confirmation_recipient_public_key', 'transaction_signature', 'confirmation_amount']
+    required = ['confirmation_sender_public_key', 'confirmation_recipient_public_key', 'transaction_signature',
+                'confirmation_amount']
     if not all(k in values for k in required):
         return 'Missing Values', 400
 

blockchain/templates/index.html

@@ -119,6 +119,19 @@ <h4 class="card-title">Transactions on the blockchain</h4>
                     console.log(error);
                 }
             });
+            $('#mine_button').click(function() {
+                $.ajax({
+                    url: '/mine',
+                    type: 'GET',
+                    success: function(response) {
+                        //window.location.reload();
+                    },
+                    error: function(error) {
+                        console.log(error);
+                    }
+
+                });
+            });
         });
 
     </script>

blockchain_client/templates/make_transaction.html

@@ -217,10 +217,10 @@ <h4 class="alert-heading">Successful Transaction!</h4>
                     header: {'Access-Control-Allow-Origin': '*'},
                     data: $('#confirmation_transaction_form').serialize(),
                     success: function(response) {
-                        $('#sender_public_key').val('');
+                        /*$('#sender_public_key').val('');
                         $('#sender_private_key').val('');
                         $('#recipient_public_key').val('');
-                        $('#amount').val('');
+                        $('#amount').val('');*/
 
                         $('#basic_modal').modal('hide');
                         $('#success_transaction_modal').modal('show');