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regnet.py
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regnet.py
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"""
Regnet specific functions and settings
"""
import base64
import math
import os
import sqlite3
import sys
import time
from Cryptodome.PublicKey import RSA
from Cryptodome.Hash import SHA
from Cryptodome.Signature import PKCS1_v1_5
from hashlib import sha224
from random import getrandbits
import connections
import mempool as mp
import mining_heavy3 as mining
# fixed diff for regnet
REGNET_DIFF = 16
REGNET_PORT = 3030
REGNET_DB = "static/regmode.db"
REGNET_INDEX = "static/index_reg.db"
REGNET_PEERS = "peers_reg.txt"
REGNET_SUGGESTED_PEERS = "peers_reg.txt"
SQL_INDEX = [ "CREATE TABLE aliases (block_height INTEGER, address, alias)",
"CREATE TABLE staking (block_height INTEGER, timestamp NUMERIC, address, balance)",
"CREATE TABLE tokens (block_height INTEGER, timestamp, token, address, recipient, txid, amount INTEGER)" ]
SQL_LEDGER = [ "CREATE TABLE misc (block_height INTEGER, difficulty TEXT)",
"CREATE TABLE transactions (block_height INTEGER, timestamp NUMERIC, address TEXT, recipient TEXT, \
amount NUMERIC, signature TEXT, public_key TEXT, block_hash TEXT, fee NUMERIC, reward NUMERIC, \
operation TEXT, openfield TEXT)",
"INSERT INTO transactions (openfield, operation, reward, fee, block_hash, public_key, signature, \
amount, recipient, address, timestamp, block_height) \
VALUES ('genesis', 1, 1, 0, '7a0f384876aca3871adbde8622a87f8b971ede0ed8ee10425e3958a1', \
'-----BEGIN PUBLIC KEY-----\nMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDKvLTbDx85a1ugb/6xMMhVOq6U\n2GeYT8+Iq2z9FwIMR40l2ttGqNK7varNccFLIu8Kn4ogDQs3WSWQCxNkhZh/FqzF\nYYa3/ItPPfzrXqgajwD8q4Zt4Ymjt8+2BkImPjjFNkuTQIz2Iu3yFqOIxLdjMw7n\nUVu9tFPiUkD0VnDPLQIDAQAB\n-----END PUBLIC KEY-----', \
'DKiWVr+GQHrsEUlu3qEQnsB5rznU4Is7RFLnPmHM1grobiUFHup0kSWiN83gBkNS9LgE57RXUEJvxMKc+9hIAzYE8EwGtO3RsXxkqPTT1v19CguN0iqE4nIM8Bur53/Djs5a1bH/R8EMersemZY1bDJ4jTeeba6yqFxmevGk/gw=', \
0, '4edadac9093d9326ee4b17f869b14f1a2534f96f9c5d7b48dc9acaed', 'genesis', 1493640955.47, 1);",
"INSERT INTO misc (difficulty, block_height) VALUES ({},1)".format(REGNET_DIFF)]
FILES_TO_REMOVE = [REGNET_DB, REGNET_INDEX]
HASHCOUNT = 10
# Max number of tx to embed per block.
TX_PER_BLOCK = 2
# Do not edit below, it's fed by node.py
ADDRESS = 'This is a fake address placeholder for regtest mode only'
KEY = None
PRIVATE_KEY_READABLE = 'matching priv key'
PUBLIC_KEY_HASHED = 'matching pub key b64'
DIGEST_BLOCK = None
# because of compatibility - huge node refactor wanted.
def generate_one_block(blockhash, mempool_txs, node, db_handler):
try:
if not blockhash:
node.logger.app_log.warning("Bad blockhash")
return
diff_hex = math.floor((REGNET_DIFF / 8) - 1)
mining_condition = blockhash[0:diff_hex]
while True:
try_arr = [('%0x' % getrandbits(32)) for i in range(HASHCOUNT)]
i = 0
for i in range(100):
i += 1
seed = ('%0x' % getrandbits(128 - 32))
prefix = ADDRESS + seed
possibles = [nonce for nonce in try_arr if
mining_condition in (mining.anneal3(mining.MMAP, int.from_bytes(
sha224((prefix + nonce + blockhash).encode("utf-8")).digest(), 'big')))]
if possibles:
nonce = seed + possibles[0]
node.logger.app_log.warning("Generate got a block in {} tries len {}".format(i, len(possibles)))
# assemble block with mp data
txs = []
for i in range(TX_PER_BLOCK):
if not len(mempool_txs):
break
txs.append(mempool_txs.pop(0))
block_send = []
removal_signature = []
for mpdata in txs:
transaction = (
str(mpdata[0]), str(mpdata[1][:56]), str(mpdata[2][:56]), '%.8f' % float(mpdata[3]),
str(mpdata[4]), str(mpdata[5]), str(mpdata[6]),
str(mpdata[7])) # create tuple
# node.logger.app_log.warning transaction
block_send.append(transaction) # append tuple to list for each run
removal_signature.append(str(mpdata[4])) # for removal after successful mining
# claim reward
block_timestamp = '%.2f' % time.time()
transaction_reward = (str(block_timestamp), str(ADDRESS[:56]), str(ADDRESS[:56]),
'%.8f' % float(0), "0", str(nonce)) # only this part is signed!
# node.logger.app_log.warning transaction_reward
hash = SHA.new(str(transaction_reward).encode("utf-8"))
signer = PKCS1_v1_5.new(KEY)
signature = signer.sign(hash)
signature_enc = base64.b64encode(signature)
if signer.verify(hash, signature):
node.logger.app_log.warning("Signature valid")
block_send.append((str(block_timestamp), str(ADDRESS[:56]), str(ADDRESS[:56]), '%.8f' % float(0),
str(signature_enc.decode("utf-8")), str(PUBLIC_KEY_HASHED.decode("utf-8")),
"0", str(nonce))) # mining reward tx
node.logger.app_log.warning("Block to send: {}".format(block_send))
# calc hash
new_hash = DIGEST_BLOCK(node, [block_send], None, 'regtest', db_handler)
# post block to self or better, send to db to make sure it is. when we add the next one?
# use a link to the block digest function
# embed at mot TX_PER_BLOCK txs from the mp
return new_hash
except Exception as e:
node.logger.app_log.warning(e)
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
node.logger.app_log.warning(exc_type, fname, exc_tb.tb_lineno)
def command(sdef, data, blockhash, node, db_handler):
try:
node.logger.app_log.warning("Regnet got command {}".format(data))
if data == 'regtest_generate':
how_many = int(connections.receive(sdef))
node.logger.app_log.warning("regtest_generate {} {}".format(how_many, blockhash))
mempool_txs = mp.MEMPOOL.fetchall(mp.SQL_SELECT_TX_TO_SEND)
for i in range(how_many):
blockhash = generate_one_block(blockhash, mempool_txs, node, db_handler)
connections.send(sdef, 'OK')
except Exception as e:
node.logger.app_log.warning(e)
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
node.logger.app_log.warning(exc_type, fname, exc_tb.tb_lineno)
def init(app_log):
# Empty peers
with open(REGNET_PEERS, 'w') as f:
f.write("{}")
with open(REGNET_SUGGESTED_PEERS, 'w') as f:
f.write("{}")
# empty files
for remove_me in FILES_TO_REMOVE:
if os.path.exists(remove_me):
os.remove(remove_me)
# create empty index db
with sqlite3.connect(REGNET_DB) as source_db:
for request in SQL_LEDGER:
source_db.execute(request)
source_db.commit()
# create empty reg db
with sqlite3.connect(REGNET_INDEX) as source_db:
for request in SQL_INDEX:
source_db.execute(request)
source_db.commit()
# Here, we do not have the keys info yet.