def accept_review(self):
"""
:return:
:rtype bool
"""
time = timeutil.get_time() # timestamp
# check signature
if not PyKey.static_verify(
self.pubkey_from, self.get_sig_hash(out_type='str'), self.sig):
return False
reviewdb = PyReviewDB()
# Add review text to recipient
reviews = reviewdb.read_reviews(self.hash_to) # list<PyReview>
reviews.append(self)
reviewdb.write_reviews(self.hash_to, reviews)
# Add link from sender
user = PyUser()
hash_from = cryptoutil.Hash(self.pubkey_from)
reviewdb.read_user(hash_from)
user.links_out.append(self.hash_to)
reviewdb.write_user(hash_from, user)
reviewdb.close()
if not add_atoms_and_propagate(
self.hash_to,
user.atoms_out if len(user.atoms_out) > 0 else [0], False):
return False
return True
def genesis_block():
timestamp = "The Times 22/Mar/2017 Chancellor on brink of second bailout for banks"
tx_new = Tx.PyTransaction()
txin = Tx.PyTxIn()
init_nbits = 0x1f00ffff
sig = Script.PyScript().append(init_nbits).append_num(4).extend(timestamp)
# script << nbits << extra_nonce
txin.script_sig = sig
txout = Tx.PyTxOut()
txout.value = 50 * cfg.COIN
# scriptPubKey << OP_DUP << OP_HASH160 << hash160 << OP_EQUALVERIFY << OP_CHECKSIG; Hash160(pubkey) # txNew.vout[0].scriptPubKey << key.GetPubKey() << OP_CHECKSIG;
# txNew.vout[0].scriptPubKey = CScript() << CBigNum("0x5F1DF16B2B704C8A578D0BBAF74D385CDE12C11EE50455F3C438EF4C3FBCF649B6DE611FEAE06279A60939E028A8D65C10B73071A6F16719274855FEB0FD8A6704") << OP_CHECKSIG;
txout.script_pubkey = Script.PyScript().extend(binascii.unhexlify(cfg.GENESIS_PUBKEY)) \
.append(Script.OpCodeType.OP_CHECKSIG)
tx_new.l_in.append(txin)
tx_new.l_out.append(txout)
block = Block.PyBlock()
block.l_tx.append(tx_new)
block.hash_prev_block = 0
block.hash_merkle_root = block.build_merkle_tree()
block.version = 1
block.time = 1490092537
# block.bits = 0x2000ffff #
block.bits = init_nbits # nonce:45164 hash:2e72d19b7558bd6ec869e5601c3613cc7a6b3f24118773d7aaaa3c285493fdfc
# block.bits = 0x1e00ffff # nonce:xxx (cast almost 5 min)
block.nonce = 0
hash_target = BN.PyBigNum.set_compact(block.bits).get_uint256()
target_hex = serialize.hexser_uint256(hash_target)
# target_hex = long(hash_target)
time1 = timeutil.get_time()
print 'start time:', time1
while True:
block_hash = cryptoutil.Hash(block.serialize())
print 'nonce:', block.nonce
print 'now hash:'
print serialize.hexser_uint256(block_hash)
# print long(block_hash)
print 'target'
print target_hex
if block_hash <= hash_target:
print 'current nonce:'
print block.nonce
print binascii.hexlify(serialize.ser_uint256(block.get_hash()))
print block.get_hash('hex')
print long(hash_target)
break
block.nonce += 1
time2 = timeutil.get_time()
print 'end time:', time2
diff = time2 - time1
print("%d:%d" % (diff / 60, diff % 60))
def get_hash(self, out_type=None):
s = PyTransaction.serialize(self, SerType.SER_GETHASH, nVersion=cfg.VERSION)
return cryptoutil.Hash(s, out_type=out_type)
def calc_sha256(self):
if self.sha256 is None:
self.sha256 = cryptoutil.Hash(self.serialize())
return self.sha256
def get_hash(self, out_type=None):
return cryptoutil.Hash(serialize_hash(self), out_type=out_type)
def bitcoin_miner(t):
"""
:param t:
:type t: ExitedThread
:return:
"""
print "Miner started"
# TODO add thread priority THREAD_PRIORITY_LOWEST
key = Key.PyKey()
key.make_new_key()
extra_nonce = 0
while ctx.fGenerateCoins:
timeutil.sleep_msec(50) # 50 ms
t.check_self_shutdown()
if t.exit:
break
# while len(ctx.listNodes) == 0:
# timeutil.sleep_msec(1000)
# t.check_self_shutdown()
# if t.exit:
# return True
transactions_updated_last = ctx.transactionsUpdated
index_prev = ctx.indexBest
bits = Block.get_next_work_required(index_prev)
# create coinbase tx
tx_new = Tx.PyTransaction()
tx_in = Tx.PyTxIn()
tx_in.prev_out.set_null()
extra_nonce += 1
tx_in.script_sig.append(bits).append(extra_nonce)
tx_new.l_in.append(tx_in)
tx_out = Tx.PyTxOut()
tx_out.script_pubkey.extend(key.get_pubkey()).append(
Script.OpCodeType.OP_CHECKSIG)
tx_new.l_out.append(tx_out)
# create new block
block = Block.PyBlock()
# Add our coinbase tx as first transaction
block.l_tx.append(tx_new)
# Collect the latest transactions into the block
fees = 0
with ctx.mainLock:
with ctx.dictTransactionsLock:
txdb = Tx.PyTxDB("r")
test_pool = dict() # map<uint256, PyTxIndex>
flag_already_added = [False] * len(ctx.dictTransactions)
found_something = True
block_size = 0
while found_something and block_size < cfg.MAX_SIZE / 2: # block_size < 2MB/2 = 1MB
found_something = False
n = 0
for tx_hash, tx in ctx.dictTransactions.iteritems():
if flag_already_added[n]:
continue
if tx.is_coinbase() or not tx.is_final():
continue
# Transaction fee requirements, mainly only needed for flood control
# Under 10K (about 80 inputs) is free for first 100 transactions
# Base rate is 0.01 per KB
min_fee = tx.get_min_fee(
len(block.l_tx) < 100) # 100 个交易内的打折，之后的不打折
tmp_test_pool = copy.deepcopy(
test_pool) # 防止下面执行出错对test_pool产生干扰
ret = tx.connect_inputs(txdb, tmp_test_pool,
Tx.PyDiskTxPos(1, 1, 1), 0,
False, True, min_fee)
if ret is None:
continue
fees += ret # 累积交易费
test_pool = tmp_test_pool
block.l_tx.append(tx)
block_size += tx.serialize_size(
serialize.SerType.SER_NETWORK)
flag_already_added[n] = True
found_something = True # 这是为了跳出外层 while
n += 1
# end for
pass
pass # end while
txdb.close()
pass
# end critical_block
pass
block.bits = bits
block.l_tx[0].l_out[0].value = block.get_block_value(fees)
print("\n\nRunning Miner with %d transactions in block" %
len(block.l_tx))
# Prebuild hash buffer
class Unnamed1(serialize.Serializable):
class Unnamed2(serialize.Serializable):
def __init__(self):
self.version = 0
self.hash_prev_block = 0
self.hash_merkle_root = 0
self.time = 0
self.bits = 0
self.nonce = 0
def serialize(self, nType=0, nVersion=cfg.VERSION):
s = b''
s += serialize.ser_int(self.version)
s += serialize.ser_uint256(self.hash_prev_block)
s += serialize.ser_uint256(self.hash_merkle_root)
s += serialize.ser_uint(self.time)
s += serialize.ser_uint(self.bits)
s += serialize.ser_uint(self.nonce)
return s
def __init__(self):
self.block = Unnamed1.Unnamed2()
self.padding0 = ['\x00'] * 64
self.hash1 = 0
self.padding1 = ['\x00'] * 64
tmp = Unnamed1()
tmp.block.version = block.version
tmp.block.hash_prev_block = block.hash_prev_block = (
index_prev.get_block_hash() if index_prev else 0)
tmp.block.hash_merkle_root = block.hash_merkle_root = block.build_merkle_tree(
)
tmp.block.time = block.time = max(
(index_prev.get_median_time_past() + 1 if index_prev else 0),
timeutil.get_adjusted_time())
tmp.block.bits = block.bits = bits # difficulty
tmp.block.nonce = block.nonce = 1 # 从1 开始计算
# blocks0 = format_hash_blocks(tmp.block.serialize(), tmp.padding0)
# blocks1 = format_hash_blocks(serialize.ser_uint256(tmp.hash1), tmp.padding1)
# search
start = timeutil.get_time()
block_hash = 0
hash_target = BN.PyBigNum.set_compact(block.bits).get_uint256()
while True:
if t.exit:
break
# use local sha256
block_hash = cryptoutil.Hash(tmp.block.serialize())
if block_hash <= hash_target:
block.nonce = tmp.block.nonce
assert block_hash == block.get_hash()
# debug print
print("Miner:")
print("proof-of-work found \n hash: %s \ntarget: %s\n" %
(serialize.hexser_uint256(block_hash),
serialize.hexser_uint256(hash_target)))
print str(block)
# TODO setthreadpriority THREAD_PRIORITY_NORMAL
with ctx.mainLock:
# save key
kaction.add_key(key)
key.make_new_key()
# Process this block the same as if we had received it from another node
if not blkaction.process_block(None, block):
print(
"ERROR in CoinMiner, ProcessBlock, block not accepted"
)
else:
print("miner a block, waiting for relay")
# TODO ADD THREAD_PRIORITY_LOWEST
timeutil.sleep_msec(500)
break
# Update nTime every few seconds
tmp.block.nonce += 1
if tmp.block.nonce & 0x3FFFF == 0:
# checkforshutdown
if tmp.block.nonce == 0:
break
if id(index_prev) != id(ctx.indexBest):
break
if ctx.transactionsUpdated != transactions_updated_last and (
timeutil.get_time() - start > 60):
break
if not ctx.fGenerateCoins:
break
tmp.block.time = block.time = max(
(index_prev.get_median_time_past() + 1),
timeutil.get_adjusted_time())
pass # end nonce loop
pass # end whole loop
return True
def get_user_hash(self, out_type=None):
return cryptoutil.Hash(self.pubkey_from, out_type)
def get_sig_hash(self, out_type=None):
return cryptoutil.Hash(
serialize_hash(self, SerType.SER_GETHASH | SerType.SER_SKIPSIG),
out_type)