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Wallet.py
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Wallet.py
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import crypto
import os, json
from Mempool import get_mempool
from Transaction import UnsignedTransaction, Transaction
from Blockchain import get_blockchain
from UTXO import UTXO
class Wallet:
def __init__(self):
if os.path.isfile("private_key.json"):
self.private_key, self.password = self.load_from_file()
else:
self.password = crypto.generate_password()
self.private_key = crypto.generate_private_pem_string(password_string=self.password)
self.save_to_file()
self.public_key = crypto.generate_public_pem_string(self.private_key, self.password)
def send_money(self, receiver_pks, msgs):
money_to_send = 0
for m in msgs:
money_to_send = money_to_send + m
tx = self.create_transaction(self.get_utxos(money_to_send), receiver_pks, msgs)
self.insert_to_mempool(tx)
def get_utxos(self, money):
blockchain = get_blockchain()
utxos = blockchain.get_utxos(crypto.generate_public_pem_string(self.private_key, self.password))
assert isinstance(utxos, list)
valid_utxos = []
for i in utxos:
assert isinstance(i, UTXO)
if get_blockchain().is_valid_UTXO(i):
valid_utxos.append(i)
needed_utxos = []
total_amount = 0
for i in valid_utxos:
needed_utxos.append(i)
if total_amount >= money:
break
return needed_utxos
def create_transaction(self, utxos, receiver_pks, msgs):
unsigned = UnsignedTransaction(utxos=utxos, receiver_public_keys=receiver_pks, messages=msgs)
tx = Transaction(utxos=utxos, receiver_public_keys=receiver_pks, messages=msgs, signature=unsigned.sign(priv_key=self.private_key, password=self.password))
return tx
def insert_to_mempool(self, tx):
get_mempool().insert_transaction(tx)
def save_to_file(self):
data = {
"private_key": self.private_key,
"password": self.password
}
with open("private_key.json", "w") as output:
output.write(json.dumps(data))
def load_from_file(self):
with open("private_key.json", "r") as input_file:
data = json.loads(input_file.read())
return data["private_key"], data["password"]