def import_transaction(self, txid, tx, block_height, touched_addr):
undo = {
'prev_addr': []
} # contains the list of pruned items for each address in the tx; also, 'prev_addr' is a list of prev addresses
prev_addr = []
for i, x in enumerate(tx.get('inputs')):
txi = (x.get('prevout_hash') +
int_to_hex4(x.get('prevout_n'))).decode('hex')
addr = self.get_address(txi)
if addr is not None:
self.set_spent(addr, txi, txid, i, block_height, undo)
touched_addr.add(addr)
prev_addr.append(addr)
undo['prev_addr'] = prev_addr
# here I add only the outputs to history; maybe I want to add inputs too (that's in the other loop)
for x in tx.get('outputs'):
addr = x.get('address')
if addr is None: continue
self.add_to_history(addr, txid, x.get('index'), x.get('value'),
block_height)
touched_addr.add(addr)
return undo
def revert_add_to_history(self, addr, tx_hash, tx_pos, value, tx_height):
key = self.address_to_key(addr)
txo = (tx_hash + int_to_hex4(tx_pos)).decode('hex')
# delete
self.delete_key(key + txo)
# backlink
self.db_addr.delete(txo)
def set_spent(self, addr, txi, txid, index, height, undo):
key = self.address_to_key(addr)
leaf = key + txi
s = self.delete_key(leaf)
value = bytes8_to_int(s[0:8])
in_height = bytes4_to_int(s[8:12])
undo[leaf] = value, in_height
# delete backlink txi-> addr
self.db_addr.delete(txi)
# add to history
s = self.db_hist.get(addr)
if s is None: s = ''
txo = (txid + int_to_hex4(index) + int_to_hex4(height)).decode('hex')
s += txi + int_to_bytes4(in_height) + txo
s = s[-80 * self.pruning_limit:]
self.db_hist.put(addr, s)
def set_spent(self, addr, txi, txid, index, height, undo):
key = self.address_to_key(addr)
leaf = key + txi
s = self.delete_key(leaf)
value = bytes8_to_int(s[0:8])
in_height = bytes4_to_int(s[8:12])
undo[leaf] = value, in_height
# delete backlink txi-> addr
self.db_addr.delete(txi)
# add to history
s = self.db_hist.get(addr)
if s is None: s = ''
txo = (txid + int_to_hex4(index) + int_to_hex4(height)).decode('hex')
s += txi + int_to_bytes4(in_height) + txo
s = s[ -80*self.pruning_limit:]
self.db_hist.put(addr, s)
def add_to_history(self, addr, tx_hash, tx_pos, value, tx_height):
key = self.address_to_key(addr)
txo = (tx_hash + int_to_hex4(tx_pos)).decode('hex')
# write the new history
self.add_key(key + txo, value, tx_height)
# backlink
self.db_addr.put(txo, addr)
def revert_add_to_history(self, addr, tx_hash, tx_pos, value, tx_height):
key = self.address_to_key(addr)
txo = (tx_hash + int_to_hex4(tx_pos)).decode('hex')
# delete
self.delete_key(key + txo)
# backlink
self.db_addr.delete(txo)
def add_to_history(self, addr, tx_hash, tx_pos, value, tx_height):
key = self.address_to_key(addr)
txo = (tx_hash + int_to_hex4(tx_pos)).decode('hex')
# write the new history
self.add_key(key + txo, value, tx_height)
# backlink
self.db_addr.put(txo, addr)
def import_transaction(self, txid, tx, block_height, touched_addr):
undo = {
"prev_addr": []
} # contains the list of pruned items for each address in the tx; also, 'prev_addr' is a list of prev addresses
prev_addr = []
for i, x in enumerate(tx.get("inputs")):
txi = (x.get("prevout_hash") + int_to_hex4(x.get("prevout_n"))).decode("hex")
addr = self.get_address(txi)
if addr is not None:
self.set_spent(addr, txi, txid, i, block_height, undo)
touched_addr.add(addr)
prev_addr.append(addr)
undo["prev_addr"] = prev_addr
# here I add only the outputs to history; maybe I want to add inputs too (that's in the other loop)
for x in tx.get("outputs"):
addr = x.get("address")
if addr is None:
continue
self.add_to_history(addr, txid, x.get("index"), x.get("value"), block_height)
touched_addr.add(addr)
return undo
def add_key(self, target, value, height):
assert len(target) == KEYLENGTH
path = self.get_path(target, new=True)
if path is True:
return
#print "add key: target", target.encode('hex'), "path", map(lambda x: x.encode('hex'), path)
parent = path[-1]
parent_node = self.get_node(parent)
n = len(parent)
c = target[n]
if parent_node.has(c):
h, v = parent_node.get(c)
skip = self.get_skip(parent + c)
child = parent + c + skip
assert not target.startswith(child)
prefix = self.common_prefix(child, target)
index = len(prefix)
if len(child) == KEYLENGTH:
# if it's a leaf, get hash and value of new_key from parent
d = Node.from_dict({
target[index]: (None, 0),
child[index]: (h, v)
})
else:
# if it is not a leaf, update its hash because skip_string changed
child_node = self.get_node(child)
h, v = child_node.get_hash(child, prefix)
d = Node.from_dict({
target[index]: (None, 0),
child[index]: (h, v)
})
self.set_skip(prefix + target[index], target[index + 1:])
self.set_skip(prefix + child[index], child[index + 1:])
self.put_node(prefix, d)
path.append(prefix)
self.parents[child] = prefix
# update parent skip
new_skip = prefix[n + 1:]
self.set_skip(parent + c, new_skip)
parent_node.set(c, None, 0)
self.put_node(parent, parent_node)
else:
# add new letter to parent
skip = target[n + 1:]
self.set_skip(parent + c, skip)
parent_node.set(c, None, 0)
self.put_node(parent, parent_node)
# write the new leaf
s = (int_to_hex8(value) + int_to_hex4(height)).decode('hex')
self.db_utxo.put(target, s)
# the hash of a leaf is the txid
_hash = target[20:52]
self.update_node_hash(target, path, _hash, value)
def add_key(self, target, value, height):
assert len(target) == KEYLENGTH
path = self.get_path(target, new=True)
if path is True:
return
#print "add key: target", target.encode('hex'), "path", map(lambda x: x.encode('hex'), path)
parent = path[-1]
parent_node = self.get_node(parent)
n = len(parent)
c = target[n]
if parent_node.has(c):
h, v = parent_node.get(c)
skip = self.get_skip(parent + c)
child = parent + c + skip
assert not target.startswith(child)
prefix = self.common_prefix(child, target)
index = len(prefix)
if len(child) == KEYLENGTH:
# if it's a leaf, get hash and value of new_key from parent
d = Node.from_dict({
target[index]: (None, 0),
child[index]: (h, v)
})
else:
# if it is not a leaf, update its hash because skip_string changed
child_node = self.get_node(child)
h, v = child_node.get_hash(child, prefix)
d = Node.from_dict({
target[index]: (None, 0),
child[index]: (h, v)
})
self.set_skip(prefix + target[index], target[index+1:])
self.set_skip(prefix + child[index], child[index+1:])
self.put_node(prefix, d)
path.append(prefix)
self.parents[child] = prefix
# update parent skip
new_skip = prefix[n+1:]
self.set_skip(parent+c, new_skip)
parent_node.set(c, None, 0)
self.put_node(parent, parent_node)
else:
# add new letter to parent
skip = target[n+1:]
self.set_skip(parent+c, skip)
parent_node.set(c, None, 0)
self.put_node(parent, parent_node)
# write the new leaf
s = (int_to_hex8(value) + int_to_hex4(height)).decode('hex')
self.db_utxo.put(target, s)
# the hash of a leaf is the txid
_hash = target[20:52]
self.update_node_hash(target, path, _hash, value)
def revert_transaction(self, txid, tx, block_height, touched_addr, undo):
#print_log("revert tx", txid)
for x in reversed(tx.get('outputs')):
addr = x.get('address')
if addr is None: continue
self.revert_add_to_history(addr, txid, x.get('index'), x.get('value'), block_height)
touched_addr.add(addr)
prev_addr = undo.pop('prev_addr')
for i, x in reversed(list(enumerate(tx.get('inputs')))):
addr = prev_addr[i]
if addr is not None:
txi = (x.get('prevout_hash') + int_to_hex4(x.get('prevout_n'))).decode('hex')
self.revert_set_spent(addr, txi, undo)
touched_addr.add(addr)
assert undo == {}
def revert_transaction(self, txid, tx, block_height, touched_addr, undo):
#print_log("revert tx", txid)
for x in reversed(tx.get('outputs')):
addr = x.get('address')
if addr is None: continue
self.revert_add_to_history(addr, txid, x.get('index'), x.get('value'), block_height)
touched_addr.add(addr)
prev_addr = undo.pop('prev_addr')
for i, x in reversed(list(enumerate(tx.get('inputs')))):
addr = prev_addr[i]
if addr is not None:
txi = (x.get('prevout_hash') + int_to_hex4(x.get('prevout_n'))).decode('hex')
self.revert_set_spent(addr, txi, undo)
touched_addr.add(addr)
assert undo == {}
def memorypool_update(self):
t0 = time.time()
mempool_hashes = set(self.bitcoind('getrawmempool'))
touched_addresses = set()
# get new transactions
new_tx = {}
for tx_hash in mempool_hashes:
if tx_hash in self.mempool_hashes:
continue
tx = self.get_mempool_transaction(tx_hash)
if not tx:
continue
new_tx[tx_hash] = tx
# remove older entries from mempool_hashes
self.mempool_hashes = mempool_hashes
# check all tx outputs
for tx_hash, tx in new_tx.iteritems():
mpa = self.mempool_addresses.get(tx_hash, {})
out_values = []
for x in tx.get('outputs'):
addr = x.get('address', '')
out_values.append((addr, x['value']))
if not addr:
continue
v = mpa.get(addr, 0)
v += x['value']
mpa[addr] = v
touched_addresses.add(addr)
self.mempool_addresses[tx_hash] = mpa
self.mempool_values[tx_hash] = out_values
# check all inputs
for tx_hash, tx in new_tx.iteritems():
mpa = self.mempool_addresses.get(tx_hash, {})
for x in tx.get('inputs'):
mpv = self.mempool_values.get(x.get('prevout_hash'))
if mpv:
addr, value = mpv[ x.get('prevout_n')]
else:
txi = (x.get('prevout_hash') + int_to_hex4(x.get('prevout_n'))).decode('hex')
try:
addr = self.storage.get_address(txi)
value = self.storage.get_utxo_value(addr,txi)
except:
print_log("utxo not in database; postponing mempool update")
return
if not addr:
continue
v = mpa.get(addr,0)
v -= value
mpa[addr] = v
touched_addresses.add(addr)
self.mempool_addresses[tx_hash] = mpa
# remove deprecated entries from mempool_addresses
for tx_hash, addresses in self.mempool_addresses.items():
if tx_hash not in self.mempool_hashes:
del self.mempool_addresses[tx_hash], self.mempool_values[tx_hash]
touched_addresses.update(addresses)
# remove deprecated entries from mempool_hist
new_mempool_hist = {}
for addr in self.mempool_hist.iterkeys():
h = self.mempool_hist[addr]
hh = []
for tx_hash, delta in h:
if tx_hash in self.mempool_addresses:
hh.append((tx_hash, delta))
if hh:
new_mempool_hist[addr] = hh
# add new transactions to mempool_hist
for tx_hash in new_tx.iterkeys():
addresses = self.mempool_addresses[tx_hash]
for addr, delta in addresses.iteritems():
h = new_mempool_hist.get(addr, [])
if (tx_hash, delta) not in h:
h.append((tx_hash, delta))
new_mempool_hist[addr] = h
with self.mempool_lock:
self.mempool_hist = new_mempool_hist
# invalidate cache for touched addresses
for addr in touched_addresses:
self.invalidate_cache(addr)
t1 = time.time()
if t1-t0>1:
print_log('mempool_update', t1-t0, len(self.mempool_hashes), len(self.mempool_hist))
def process(self, request, cache_only=False):
message_id = request['id']
method = request['method']
params = request.get('params', ())
result = None
error = None
if method == 'blockchain.numblocks.subscribe':
result = self.storage.height
elif method == 'blockchain.headers.subscribe':
result = self.header
elif method == 'blockchain.address.subscribe':
address = str(params[0])
result = self.get_status(address, cache_only)
elif method == 'blockchain.address.get_history':
address = str(params[0])
result = self.get_history(address, cache_only)
elif method == 'blockchain.address.get_mempool':
address = str(params[0])
result = self.get_unconfirmed_history(address)
elif method == 'blockchain.address.get_balance':
address = str(params[0])
confirmed = self.storage.get_balance(address)
unconfirmed = self.get_unconfirmed_value(address)
result = { 'confirmed':confirmed, 'unconfirmed':unconfirmed }
elif method == 'blockchain.address.get_proof':
address = str(params[0])
result = self.storage.get_proof(address)
elif method == 'blockchain.address.listunspent':
address = str(params[0])
result = self.storage.listunspent(address)
elif method == 'blockchain.utxo.get_address':
txid = str(params[0])
pos = int(params[1])
txi = (txid + int_to_hex4(pos)).decode('hex')
result = self.storage.get_address(txi)
elif method == 'blockchain.block.get_header':
if cache_only:
result = -1
else:
height = int(params[0])
result = self.get_header(height)
elif method == 'blockchain.block.get_chunk':
if cache_only:
result = -1
else:
index = int(params[0])
result = self.get_chunk(index)
elif method == 'blockchain.transaction.broadcast':
try:
txo = self.bitcoind('sendrawtransaction', params)
print_log("sent tx:", txo)
result = txo
except BaseException, e:
error = e.args[0]
if error["code"] == -26:
# If we return anything that's not the transaction hash,
# it's considered an error message
message = error["message"]
if "non-mandatory-script-verify-flag" in message:
result = "Your client produced a transaction that is not accepted by the Bitcoin network any more. Please upgrade to Electrum 2.5.1 or newer\n"
else:
result = "The transaction was rejected by network rules.(" + message + ")\n" \
"[" + params[0] + "]"
else:
result = error["message"] # do send an error
print_log("error:", result)
def memorypool_update(self):
t0 = time.time()
mempool_hashes = set(self.quebecoind('getrawmempool'))
touched_addresses = set()
# get new transactions
new_tx = {}
for tx_hash in mempool_hashes:
if tx_hash in self.mempool_hashes:
continue
tx = self.get_mempool_transaction(tx_hash)
if not tx:
continue
new_tx[tx_hash] = tx
# remove older entries from mempool_hashes
self.mempool_hashes = mempool_hashes
# check all tx outputs
for tx_hash, tx in new_tx.iteritems():
mpa = self.mempool_addresses.get(tx_hash, {})
out_values = []
out_sum = 0
for x in tx.get('outputs'):
addr = x.get('address', '')
value = x['value']
out_values.append((addr, value))
if not addr:
continue
v = mpa.get(addr, 0)
v += value
mpa[addr] = v
touched_addresses.add(addr)
out_sum += value
self.mempool_fees[tx_hash] = -out_sum
self.mempool_addresses[tx_hash] = mpa
self.mempool_values[tx_hash] = out_values
self.mempool_unconfirmed[tx_hash] = set()
# check all inputs
for tx_hash, tx in new_tx.iteritems():
mpa = self.mempool_addresses.get(tx_hash, {})
# are we spending unconfirmed inputs?
input_sum = 0
for x in tx.get('inputs'):
prev_hash = x.get('prevout_hash')
prev_n = x.get('prevout_n')
mpv = self.mempool_values.get(prev_hash)
if mpv:
addr, value = mpv[prev_n]
self.mempool_unconfirmed[tx_hash].add(prev_hash)
else:
txi = (prev_hash + int_to_hex4(prev_n)).decode('hex')
try:
addr = self.storage.get_address(txi)
value = self.storage.get_utxo_value(addr, txi)
except:
print_log(
"utxo not in database; postponing mempool update")
return
# we can proceed
input_sum += value
if not addr:
continue
v = mpa.get(addr, 0)
v -= value
mpa[addr] = v
touched_addresses.add(addr)
self.mempool_addresses[tx_hash] = mpa
self.mempool_fees[tx_hash] += input_sum
# remove deprecated entries from mempool_addresses
for tx_hash, addresses in self.mempool_addresses.items():
if tx_hash not in self.mempool_hashes:
del self.mempool_addresses[tx_hash]
del self.mempool_values[tx_hash]
del self.mempool_unconfirmed[tx_hash]
del self.mempool_fees[tx_hash]
touched_addresses.update(addresses)
# remove deprecated entries from mempool_hist
new_mempool_hist = {}
for addr in self.mempool_hist.iterkeys():
h = self.mempool_hist[addr]
hh = []
for tx_hash, delta in h:
if tx_hash in self.mempool_addresses:
hh.append((tx_hash, delta))
if hh:
new_mempool_hist[addr] = hh
# add new transactions to mempool_hist
for tx_hash in new_tx.iterkeys():
addresses = self.mempool_addresses[tx_hash]
for addr, delta in addresses.iteritems():
h = new_mempool_hist.get(addr, [])
if (tx_hash, delta) not in h:
h.append((tx_hash, delta))
new_mempool_hist[addr] = h
with self.mempool_lock:
self.mempool_hist = new_mempool_hist
# invalidate cache for touched addresses
for addr in touched_addresses:
self.invalidate_cache(addr)
t1 = time.time()
if t1 - t0 > 1:
print_log('mempool_update', t1 - t0, len(self.mempool_hashes),
len(self.mempool_hist))
def process(self, request, cache_only=False):
message_id = request['id']
method = request['method']
params = request.get('params', ())
result = None
error = None
if method == 'blockchain.numblocks.subscribe':
result = self.storage.height
elif method == 'blockchain.headers.subscribe':
result = self.header
elif method == 'blockchain.address.subscribe':
address = str(params[0])
result = self.get_status(address, cache_only)
elif method == 'blockchain.address.get_history':
address = str(params[0])
result = self.get_history(address, cache_only)
elif method == 'blockchain.address.get_mempool':
address = str(params[0])
result = self.get_unconfirmed_history(address)
elif method == 'blockchain.address.get_balance':
address = str(params[0])
confirmed = self.storage.get_balance(address)
unconfirmed = self.get_unconfirmed_value(address)
result = {'confirmed': confirmed, 'unconfirmed': unconfirmed}
elif method == 'blockchain.address.get_proof':
address = str(params[0])
result = self.storage.get_proof(address)
elif method == 'blockchain.address.listunspent':
address = str(params[0])
result = self.storage.listunspent(address)
elif method == 'blockchain.utxo.get_address':
txid = str(params[0])
pos = int(params[1])
txi = (txid + int_to_hex4(pos)).decode('hex')
result = self.storage.get_address(txi)
elif method == 'blockchain.block.get_header':
if cache_only:
result = -1
else:
height = int(params[0])
result = self.get_header(height)
elif method == 'blockchain.block.get_chunk':
if cache_only:
result = -1
else:
index = int(params[0])
result = self.get_chunk(index)
elif method == 'blockchain.transaction.broadcast':
try:
txo = self.quebecoind('sendrawtransaction', params)
print_log("sent tx:", txo)
result = txo
except BaseException, e:
error = e.args[0]
if error["code"] == -26:
# If we return anything that's not the transaction hash,
# it's considered an error message
message = error["message"]
if "non-mandatory-script-verify-flag" in message:
result = "Your client produced a transaction that is not accepted by the Bitcoin network any more. Please upgrade to Electrum 2.5.1 or newer\n"
else:
result = "The transaction was rejected by network rules.(" + message + ")\n" \
"[" + params[0] + "]"
else:
result = error["message"] # do send an error
print_log("error:", result)