def request_header(self, interface, data, height):
interface.print_error("requesting header %d" % height)
interface.send_request({"method": "blockchain.block.get_header", "params": [height]})
data["header_height"] = height
data["req_time"] = time.time()
if not "chain" in data:
data["chain"] = []
def request_header(self, interface, data, height):
interface.print_error("requesting header %d" % height)
interface.send_request({'method':'blockchain.block.get_header', 'params':[height]})
data['header_height'] = height
data['req_time'] = time.time()
if not 'chain' in data:
data['chain'] = []
def on_get_chunk(self, interface, response):
'''Handle receiving a chunk of block headers'''
if self.bc_requests:
req_if, data = self.bc_requests[0]
req_idx = data.get('chunk_idx')
# Ignore unsolicited chunks
if req_if == interface and req_idx == response['params'][0]:
idx = self.blockchain.connect_chunk(req_idx, response['result'])
# If not finished, get the next chunk
if idx < 0 or not idx or self.get_local_height() >= data['if_height']:
self.bc_requests.popleft()
if not idx:
interface.print_error("header didn't match checkpoint, dismissing interface")
interface.stop()
else:
self.request_chunk(interface, data, idx)
def on_get_header(self, interface, response):
'''Handle receiving a single block header'''
if self.bc_requests:
req_if, data = self.bc_requests[0]
req_height = data.get('header_height', -1)
# Ignore unsolicited headers
if req_if == interface and req_height == response['params'][0]:
next_height = self.blockchain.connect_header(data['chain'], response['result'])
# If not finished, get the next header
if next_height in [True, False]:
self.bc_requests.popleft()
if next_height:
self.notify('updated')
else:
interface.print_error("header didn't connect, dismissing interface")
interface.stop()
else:
self.request_header(interface, data, next_height)
def on_get_header(self, interface, response):
'''Handle receiving a single block header'''
if self.bc_requests:
req_if, data = self.bc_requests[0]
req_height = data.get('header_height', -1)
# Ignore unsolicited headers
if req_if == interface and req_height == response['params'][0]:
next_height = self.blockchain.connect_header(data['chain'], response['result'])
# If not finished, get the next header
if next_height in [True, False]:
self.bc_requests.popleft()
if next_height:
self.notify('updated')
else:
interface.print_error("header didn't connect, dismissing interface")
interface.stop()
else:
self.request_header(interface, data, next_height)
def on_get_chunk(self, interface, response):
'''Handle receiving a chunk of block headers'''
if self.bc_requests:
req_if, data = self.bc_requests[0]
req_idx = data.get('chunk_idx')
# Ignore unsolicited chunks
if req_if == interface and req_idx == response['params'][0]:
idx = self.blockchain.connect_chunk(req_idx,
response['result'])
# If not finished, get the next chunk
if idx < 0 or not idx or self.get_local_height(
) >= data['if_height']:
self.bc_requests.popleft()
if not idx:
interface.print_error(
"header didn't match checkpoint, dismissing interface"
)
interface.stop()
else:
self.request_chunk(interface, data, idx)
def handle_bc_requests(self):
'''Work through each interface that has notified us of a new header.
Send it requests if it is ahead of our blockchain object'''
while self.bc_requests:
interface, data = self.bc_requests.popleft()
# If the connection was lost move on
if not interface.is_connected():
continue
req_time = data.get('req_time')
if not req_time:
# No requests sent yet. This interface has a new height.
# Request headers if it is ahead of our blockchain
if not self.bc_request_headers(interface, data):
continue
elif time.time() - req_time > 10:
interface.print_error("blockchain request timed out")
interface.stop()
continue
# Put updated request state back at head of deque
self.bc_requests.appendleft((interface, data))
break
def handle_bc_requests(self):
'''Work through each interface that has notified us of a new header.
Send it requests if it is ahead of our blockchain object'''
while self.bc_requests:
interface, data = self.bc_requests.popleft()
# If the connection was lost move on
if not interface.is_connected():
continue
req_time = data.get('req_time')
if not req_time:
# No requests sent yet. This interface has a new height.
# Request headers if it is ahead of our blockchain
if not self.bc_request_headers(interface, data):
continue
elif time.time() - req_time > 10:
interface.print_error("blockchain request timed out")
interface.stop()
continue
# Put updated request state back at head of deque
self.bc_requests.appendleft((interface, data))
break
def request_chunk(self, interface, data, idx):
interface.print_error("requesting chunk %d" % idx)
interface.send_request({'method':'blockchain.block.get_chunk', 'params':[idx]})
data['chunk_idx'] = idx
data['req_time'] = time.time()
def request_chunk(self, interface, data, idx):
interface.print_error("requesting chunk %d" % idx)
interface.send_request({'method':'blockchain.block.get_chunk', 'params':[idx]})
data['chunk_idx'] = idx
data['req_time'] = time.time()
def request_chunk(self, interface, data, idx):
interface.print_error("requesting chunk %d" % idx)
interface.send_request({"method": "blockchain.block.get_chunk", "params": [idx]})
data["chunk_idx"] = idx
data["req_time"] = time.time()
