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peer.py
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peer.py
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'''On first terminal: sudo python3 peer.py 8000 a abcdefgh lmnopqrs
where abcdefgh and lmnopqrs are the IDs
On another terminal : sudo python3 peer.py 8001 b abcdefgh lmnopqrs
Third terminal : sudo python3 query.py abcdefgh 8000 8001'''
from xmlrpc.server import SimpleXMLRPCServer
from xmlrpc.server import SimpleXMLRPCRequestHandler
from generate_random_id import generate_id
import json
import sys
import hashlib
from datetime import datetime
import uuid
import sqlite3
leafHash = []
port_number = int(sys.argv[1])
choice=sys.argv[2]
list_id_for_peers=sys.argv[3:]
class RequestHandler(SimpleXMLRPCRequestHandler):
rpc_paths = ('/RPC2',)
# Create server
server = SimpleXMLRPCServer(('localhost', port_number),requestHandler=RequestHandler)
server.register_introspection_functions()
def doubleSha256(input):
json_input=json.dumps(input)
json_input2=json_input.encode('utf-8')
return hashlib.sha256(json_input2).hexdigest()
server.register_function(doubleSha256, 'doubleSha256')
def findMerkleRoot(leafHash):
hash = []
hash2 = []
if len(leafHash) % 2 != 0:
leafHash.extend(leafHash[-1:])
for leaf in sorted(leafHash):
hash.append(leaf)
if len(hash) % 2 == 0:
hash2.append(doubleSha256(hash[0]+hash[1]))
hash == []
if len(hash2) == 1:
return hash2
else:
return findMerkleRoot(hash2)
server.register_function(findMerkleRoot,'root')
class MyFuncs:
def mul(self, x, y):
return x * y
server.register_instance(MyFuncs())
#server.register_function(encode_id_for_peer,'encode')
def authenticate(encoded_id):
#des = DES.new('01234567', DES.MODE_ECB)
#print("about to decrypt")
plain_text=encoded_id
if(plain_text not in list_id_for_peers):
print("client not authenticated")
return 0
return 1
server.register_function(authenticate,'authenticate')
def select_table():
with sqlite3.connect('participants_db.db') as conn :
cur=conn.cursor()
c=cur.execute("SELECT * FROM PARTICIPANT_BALANCE")
data=c.fetchall()
return data
server.register_function(select_table,'select_table')
def read_db(p):
COLUMN='BALANCE'
COLUMN2='NAME'
#p='a'
with sqlite3.connect('participants_db.db') as conn :
cur=conn.cursor()
#c=cur.execute("SELECT" + COLUMN + "from PARTICIPANT_BALANCE where" + COLUMN2 +"=?",(p,))
c=cur.execute("SELECT "+COLUMN+" FROM PARTICIPANT_BALANCE where "+COLUMN2+"=?", (p,))
data=c.fetchone()
return int(data[0])
server.register_function(read_db,'read')
def update_db(bal,p):
COLUMN='BALANCE'
COLUMN2='NAME'
with sqlite3.connect('participants_db.db') as conn :
cur=conn.cursor()
#cur.execute("UPDATE PARTICIPANT_BALANCE SET BALANCE=? where NAME=?",(bal,p))
cur.execute("UPDATE PARTICIPANT_BALANCE SET BALANCE=? WHERE NAME=?", (bal,p))
c=cur.execute("SELECT "+COLUMN+" FROM PARTICIPANT_BALANCE where "+COLUMN2+"=?", (p,))
data=c.fetchone()
return int(data[0])
server.register_function(update_db,'update')
def build_tree():
directory = "/home/brinda/College /Sem8/project/Codes/FINAL_DEMO/Code/Input"
new_f_1=directory+"/"+"dict_input_" + choice + ".txt"
with open(new_f_1) as file:
lines = [line.strip() for line in file]
print("\n")
print("File is",lines)
print("\n")
print("#################################################################################################################################")
print("\n")
total=0
list_of_transactions=[]
for line in lines :
input1=line.split()
print("Input is:",input1)
print("\n")
involved=input1[0]
if(choice!=involved[0]):
print("Wrong file opened")
s_bal=int(input1[1])
p_bal=int(input1[2])
amount =int(input1[3])
action=input1[4] #i want to purchase
if("purchase" in action and choice in action):
purchaser=choice
seller=involved[1]
print("Purchaser is",purchaser)
print("\n")
print("Seller is",seller)
print("\n")
s_bal=read_db(seller)
p_bal=read_db(purchaser)
new_p_bal=p_bal-amount
new_s_bal=s_bal+amount
total=total+amount
update_db(new_s_bal,seller)
update_db(new_p_bal,purchaser)
elif("sell" in action and choice in action):
seller=choice
purchaser=involved[1]
print("Seller is",seller)
print("\n")
print("Purchaser is",purchaser)
print("\n")
s_bal=read_db(seller)
p_bal=read_db(purchaser)
new_p_bal=p_bal-amount
new_s_bal=s_bal+amount
update_db(new_s_bal,seller)
update_db(new_p_bal,purchaser)
elif("sell" in action and choice not in action):
purchaser=choice
seller=involved[1]
print("Purchaser is",purchaser)
print("\n")
print("Seller is",seller)
print("\n")
s_bal=read_db(seller)
p_bal=read_db(purchaser)
new_p_bal=p_bal-amount
new_s_bal=s_bal+amount
total=total+amount
update_db(new_s_bal,seller)
update_db(new_p_bal,purchaser)
elif("purchase" in action and choice not in action):
seller=choice
purchaser=involved[1]
print("Seller is",seller)
print("\n")
print("Purchaser is",purchaser)
print("\n")
s_bal=read_db(seller)
p_bal=read_db(purchaser)
new_p_bal=p_bal-amount
new_s_bal=s_bal+amount
update_db(new_s_bal,seller)
update_db(new_p_bal,purchaser)
x=read_db(seller)
y=read_db(purchaser)
t = {}
tid = generate_id()
print("Transaction ID:",tid)
pid = generate_id()
print("Purchaser ID:",pid)
sid = generate_id()
print("Seller ID:",sid)
print("\n")
t['involved'] = involved
t['transaction_id'] = tid
t['purchaser_id'] = pid
t['seller_id'] = sid
t['amount'] = amount
t['action'] = action
t['new_purchaser_balance'] = y
print("\n")
print("New_Purchaser_Balance:",y)
print("\n")
t['new_seller_balance'] = x
print("New_Seller_Balance:",x)
print("\n")
print("transaction dictionary is",t)
print("\n")
print("total amount spent by"+' '+choice+' '+"is"+' '+str(total))
print("\n")
now = datetime.now()
timestamp = datetime.timestamp(now)
t['timestamp']=timestamp
list_of_transactions.append(t)
print("list of transactions is",list_of_transactions)
print("\n")
print("#########################################################################################################################")
print("\n")
return list_of_transactions
server.register_function(build_tree,"build")
def create_list_of_hashes(l_transactions):
for trans in l_transactions:
leafHash.append(doubleSha256(trans))
return leafHash
server.register_function(create_list_of_hashes,"create")
server.serve_forever()