How to Build Your Own Cryptocurrency Exchange with python like binance

In this tutorial you will learn how to create a bitcoin and ethereum wallet with python and then transfer from those wallets you created.

Getting Started

First of all, we will update our ubuntu system and make our system ready.

sudo apt-get update -y && sudo apt-get upgrade -y && sudo apt-get install vim -y && sudo apt-get install python-dev -y && sudo apt-get install libevent-dev -y &&  sudo apt-get install python-virtualenv -y && apt-get install git -y

First of all install python version 3.0+

sudo apt-get install --reinstall language-pack-en -y
export LC_ALL="en_US.UTF-8"
export LC_CTYPE="en_US.UTF-8"
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6
sudo apt-get install python3-pip
apt install python-pip
pip install --upgrade virtualenv

Ethereum configurations..

We are using pyethereum, web3py, eth-utils libraries for ethereum.

virtualenv -p python3.6 venv
cd venv
. bin/activate
sudo apt-get install python3.6-dev libmysqlclient-dev
sudo apt-get install libssl-dev build-essential automake pkg-config libtool libffi-dev libgmp-dev libyaml-cpp-dev
git clone https://github.com/ethereum/pyethereum/
cd pyethereum
python setup.py install
git clone https://github.com/omgbbqhaxx/PythonCrtyptoExchange.git
cd PythonCrtyptoExchange
pip install -r requirements.txt
pipenv install requests

How to create an ethereum wallet using python.

from ethereum import utils
from eth_utils import address
import os

private_key = utils.sha3(os.urandom(4096))
raw_address = utils.privtoaddr(private_key)
addressif = address.to_normalized_address(raw_address)
keyether = utils.encode_hex(private_key)

How to send ether using python.

from web3 import Web3, HTTPProvider, IPCProvider
from ethereum.transactions import Transaction
web3 = Web3(HTTPProvider('https://api.myetherapi.com/eth'))

amountexample = Web3.toWei(0.001, 'ether')
tx = Transaction(0, 60000000000, 21000, targetwallet, amountexample, "").sign('yourprivatekey')
print(tx.to_dict())
raw_tx = rlp.encode(tx)
raw_tx_hex = web3.toHex(raw_tx)
web3.eth.sendRawTransaction(raw_tx_hex)

How to deposit ether using etherscan.io API.

http://api.etherscan.io/api?module=account&action=txlist&address=0xeb02fed51228b842fb00fb18c26fe84707cd28d7&startblock=0&endblock=99999999&sort=asc&apikey=GKQMITFG5YPAG1MA2B4P6KAXGVKMQHVVWV

r = "http://api.etherscan.io/api?module=account&action=txlist&address=0xeb02fed51228b842fb00fb18c26fe84707cd28d7&startblock=0&endblock=99999999&sort=asc&apikey=GKQMITFG5YPAG1MA2B4P6KAXGVKMQHVVWV"
r = requests.get(r)
r = r.json()
for i in r["result"]:
    try:
        UserHistory.objects.get(txhash=str(i["blockHash"])) #  blockhash is important for avoid double deposit. you need save and check  #blockhash#
    except UserHistory.DoesNotExist: #if blockhash is not registered on your database.
        if(i["to"] == "0xeb02fed51228b842fb00fb18c26fe84707cd28d7"):
            ethval = web3.fromWei(int(i["value"]), 'ether') #Convert ethers from WEİ.
            acc.ethbalance = acc.ethbalance + ethval #increase user's ethereum balance.
            acc.save()
            uh = UserHistory(king=acc,txhash=str(i["blockHash"]),value=ethval,currencyname="ethereum") #save blockhash on your database! that important.
            uh.save()
        else:
            pass

Bitcoin configurations..

We are using bit libraty for bitcoin.

pip install bit

How to create a bitcoin wallet using python.

from bit import Key

btc = Key()
btc.address #Your bitcoin address.
btc.to_wif() #Your [secret] private KEY!

How to import btc wallet from key.

from bit import Key
from bit import wif_to_key
btc = Key('btcWİFkeyHere')
key = wif_to_key('btcWİFkeyHere') #alternative usagement.
btc.address #Your bitcoin address.
#get user ethbalance
btc.get_balance('usd') # Get accoun's usd balance.
btc.get_balance('btc') #Get account's btc balance.

How to send btc using python.

Bit developer docs.

from bit import Key

key = Key('btcWİFkeyHere')
key.get_unspents()
x = key.send([(targetwallet, amountasbtc, 'btc')],fee=100)
print(x)

Satoshi to Currency & btc

Satoshi to Currency docs.

from bit import Key
from bit.network import satoshi_to_currency_cached


key = Key('btcWİFkeyHere')
key.get_unspents()
satoshi_to_currency_cached(1500, 'usd')
satoshi_to_currency_cached(1500, 'btc')

How to deposit bitcoin using bitcoin.info API.

blockchain.info API docs.

txresult/TxHash/Address - Calculate the result of a transaction sent or received to Address. Multiple addresses separated by |

from bit import Key
from bit.network import satoshi_to_currency_cached
import requests

transactions = key.get_transactions()
if(len(transactions) == 0):
    pass
try:
    UserHistory.objects.get(txhash=str(transactions[0])) #
except UserHistory.DoesNotExist:
    for i in transactions:
        r = 'https://blockchain.info/q/txresult/{0}/{1}'.format(TxHash,Address)
        r = requests.get(r)
        num = int(r.text)
        if num > 0:
            try:
                UserHistory.objects.get(txhash=str(i))
            except UserHistory.DoesNotExist:
                #if dont have an any transaction
                btcbal = Decimal(satoshi_to_currency_cached(num, 'btc'))
                acc.btcbalance = acc.btcbalance + btcbal
                acc.save()
                uh = UserHistory(king=acc,txhash=str(i),value=num,currencyname="bitcoin")
                uh.save()
        else:
           print("Negative number")
    return render(request, "x.html", locals())
print("nothing changed")

Donations

• My ethereum wallet : 0xFBd6f9704478104f0EF3F4f9834c3621210fE598

Contact

• Report bugs, issues or feature requests using GitHub issues.

License

All contributions are made under the GNU General Public License v3. See LICENSE.