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accounts

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+[ 
+    '0xB0BE5EFDe83490f0d8fC64120461660098AE7599',
+    '0xe0e577218063fc8648A4b04fDcFe2fD02990f734',
+    '0xA55a74F93a50529f6F85658C22538eD9035551c3',
+    '0x0b918ccbA35F62d80530F0223e0eA0DaB0C879BA',
+    '0xCfc9EA020080496D2162B6EE8BFC84B5fbDF1FB5',
+    '0xd84A6127e81Eb9384eB30b6A2D54E29A91798651',
+    '0x35A3c8A48fb58B1d418D62c752Eeb4DA36128564',
+    '0x50EC809051d823D0F979a1a974Ad63568bf7BEC1',
+    '0x56Df378eF6AEB25Ec4fa22eDdB8f88B8407C2334',
+    '0xa5cc1434694afA6daB030EEa5D6e4235e405643E' 
+]

backend.py

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+from flask import Flask, jsonify, abort, make_response, request, url_for,session
+from flask import render_template, redirect
+import json
+import re
+import requests 
+import hashlib
+import os
+from web3 import Web3
+
+rpc = "https://naklecha.blockchain.azure.com:3200/C7sLbEihlinGLsD2k9AXwVWH"
+
+web3 = Web3(Web3.HTTPProvider(rpc))
+abi = '[{"constant":true,"inputs":[],"name":"candidatesCount","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x2d35a8a2"},{"constant":true,"inputs":[{"name":"","type":"uint256"}],"name":"candidates","outputs":[{"name":"id","type":"uint256"},{"name":"name","type":"string"},{"name":"voteCount","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function","signature":"0x3477ee2e"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"voters","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function","signature":"0xa3ec138d"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor","signature":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_candidateId","type":"uint256"}],"name":"votedEvent","type":"event","signature":"0xfff3c900d938d21d0990d786e819f29b8d05c1ef587b462b939609625b684b16"},{"constant":false,"inputs":[],"name":"end","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0xefbe1c1c"},{"constant":false,"inputs":[{"name":"_candidateId","type":"uint256"}],"name":"vote","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function","signature":"0x0121b93f"}]'
+contract_addr = "0xD6B1DbD429f998Dd09f36Cb246bE31b82b7a206C"
+
+
+app = Flask(__name__)
+app.secret_key = 'i love white chocolate too'
+
+accounts = [ 
+    '0xB0BE5EFDe83490f0d8fC64120461660098AE7599',
+    '0xe0e577218063fc8648A4b04fDcFe2fD02990f734',
+    '0xA55a74F93a50529f6F85658C22538eD9035551c3',
+    '0x0b918ccbA35F62d80530F0223e0eA0DaB0C879BA',
+    '0xCfc9EA020080496D2162B6EE8BFC84B5fbDF1FB5',
+    '0xd84A6127e81Eb9384eB30b6A2D54E29A91798651',
+    '0x35A3c8A48fb58B1d418D62c752Eeb4DA36128564',
+    '0x50EC809051d823D0F979a1a974Ad63568bf7BEC1',
+    '0x56Df378eF6AEB25Ec4fa22eDdB8f88B8407C2334',
+    '0xa5cc1434694afA6daB030EEa5D6e4235e405643E' 
+]
+
+privatekeys = [
+    '25d9479cd21fb800522f8e0c74513f0730f7afac9f3ac7a23d8ad69b7103be52',
+    '01519292e7b9fb0d98149b7b202cbd2b99d92857804140fe927855cc26026a9d',
+    '34f4f6e8a79cb192b957965b7764eb949f588027aee590557160bd2eca64123c',
+    'cc85e4484592eadf0681fe9f2d6297c1cf4cb81321fe9454b43ad04bedcab87a',
+    '4997b54bc7b835335f4324ef4e9f27fc78e42068799c07dba7f2ee517e995808',
+    '448f522922fcfd184712c8b7e8bb82de255c6ca6aa8dda76d1e7aa4bdb819d49',
+    '571f96e9291b198b7e024ab950d5868dbdc6b6137ee30bddb51ff450fa7591ce',
+    '1e4acf03770503c9e5487fab22bb81484968a50b293d6bf528eb9e0fd5bd542e',
+    '7c7aacbc4b3c839e0e870d6c08f63e3816c0b1384aa1dc6d05e9de95f2589106',
+    '58f129cbace24078382559c366c6427f88179d35f2fac2ccdf62591e7e59cbac'
+]
+
+vote_tx = []
+voted = []
+ended = 0
+
+@app.route("/" , methods=['POST'])
+def home():
+    if(not ended):
+        try:
+            data = eval(request.data) # {"aadhaarID":int(),"candidateID":int()}
+            aid = int(data["aadhaarID"])-1
+            if(aid in voted):
+                return "Already voted",400
+            cid = int(data["candidateID"])
+            acc = accounts[aid]
+            pvt = privatekeys[aid]
+            contract = web3.eth.contract(address=contract_addr, abi=abi)
+            transaction  = contract.functions.vote(cid).buildTransaction()
+            transaction['nonce'] = web3.eth.getTransactionCount(acc)
+
+            signed_tx = web3.eth.account.signTransaction(transaction, pvt)
+            tx_hash = web3.eth.sendRawTransaction(signed_tx.rawTransaction)
+            vote_tx.append(tx_hash)
+            voted.append(aid)
+            return "Vote successfully casted",200
+        except:
+            return "Error processing",500
+    else:
+        return "Election period ended",400
+
+@app.route("/results" , methods=['GET'])
+def count():
+    if(ended):
+            res = []
+            election = web3.eth.contract(address=contract_addr, abi=abi)
+            for i in range(election.caller().candidatesCount()):    
+                res.append(election.caller().candidates(i+1))
+            return json.dumps(res),200
+    else:
+        return "Election still on going",400
+
+@app.route("/end" , methods=['POST'])
+def end_election():
+    global ended
+    ended += 1
+    acc = '0xB0BE5EFDe83490f0d8fC64120461660098AE7599'
+    pvt = '25d9479cd21fb800522f8e0c74513f0730f7afac9f3ac7a23d8ad69b7103be52'
+    contract = web3.eth.contract(address=contract_addr, abi=abi)
+    transaction  = contract.functions.end().buildTransaction()
+    transaction['nonce'] = web3.eth.getTransactionCount(acc)
+
+    signed_tx = web3.eth.account.signTransaction(transaction, pvt)
+    tx_hash = web3.eth.sendRawTransaction(signed_tx.rawTransaction)
+    return "Election successfully ended\nTx Hash : %s"%(str(tx_hash)),200
+
+@app.route("/number_of_users" , methods=['GET'])
+def number_of_users(): 
+    try:
+        return str(len(accounts)),200
+    except:
+        return "Error processing",500
+
+@app.route("/isended" , methods=['GET'])
+def isended(): 
+    return str(ended>0),200
+
+@app.route("/candidates_list" , methods=['GET'])
+def candidates_list():
+    try:
+        res = []
+        election = web3.eth.contract(address=contract_addr, abi=abi)
+        for i in range(election.caller().candidatesCount()):    
+            res.append(election.caller().candidates(i+1)[1]) #name
+        return json.dumps(res),200
+    except:
+        return "Error processing",500
+
+if __name__ == '__main__':
+	app.run(host="0.0.0.0" ,port=80, debug = True)

backend_startup.txt

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+gunicorn --bind=0.0.0.0 --timeout 600 backend:app
+

frontend_startup.txt

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+gunicorn --bind=0.0.0.0 --timeout 600 --chdir frontend frontend:app

package.json

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+{
+  "name": "election",
+  "version": "0.1.0",
+  "dependencies": {
+    "truffle-hdwallet-provider": "1.0.10"
+  },
+  "directories": {
+    "test": "test"
+  },
+  "scripts": {
+    "dev": "lite-server",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "devDependencies": {
+    "lite-server": "^2.3.0",
+    "truffle": "5.0.0-beta.0"
+  }
+}

private_keys

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+[
+    '25d9479cd21fb800522f8e0c74513f0730f7afac9f3ac7a23d8ad69b7103be52',
+    '01519292e7b9fb0d98149b7b202cbd2b99d92857804140fe927855cc26026a9d',
+    '34f4f6e8a79cb192b957965b7764eb949f588027aee590557160bd2eca64123c',
+    'cc85e4484592eadf0681fe9f2d6297c1cf4cb81321fe9454b43ad04bedcab87a',
+    '4997b54bc7b835335f4324ef4e9f27fc78e42068799c07dba7f2ee517e995808',
+    '448f522922fcfd184712c8b7e8bb82de255c6ca6aa8dda76d1e7aa4bdb819d49',
+    '571f96e9291b198b7e024ab950d5868dbdc6b6137ee30bddb51ff450fa7591ce',
+    '1e4acf03770503c9e5487fab22bb81484968a50b293d6bf528eb9e0fd5bd542e',
+    '7c7aacbc4b3c839e0e870d6c08f63e3816c0b1384aa1dc6d05e9de95f2589106',
+    '58f129cbace24078382559c366c6427f88179d35f2fac2ccdf62591e7e59cbac'
+]

truffle-config.js

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+const HDWalletProvider = require('truffle-hdwallet-provider');
+const fs = require('fs');
+module.exports = {
+  networks: {
+    development: {
+      host: "127.0.0.1",
+      port: 7545,
+      network_id: "*"
+    },
+    naklechaConsortium: {
+      network_id: "*",
+      gas: 0,
+      gasPrice: 0,
+      provider: new HDWalletProvider(fs.readFileSync('mnemonic.env', 'utf-8'), "https://naklecha.blockchain.azure.com:3200/C7sLbEihlinGLsD2k9AXwVWH"),
+      consortium_id: 1564473954588
+    }
+  },
+  mocha: {},
+};