def on_notify_header(self, interface, header):
height = header.get('block_height')
if not height:
return
interface.tip_header = header
interface.tip = height
if interface.mode != 'default':
return
b = blockchain.check_header(header)
if b:
interface.blockchain = b
self.switch_lagging_interface()
self.notify('interfaces')
return
b = blockchain.can_connect(header)
if b:
interface.blockchain = b
b.save_header(header)
self.switch_lagging_interface()
self.notify('updated')
self.notify('interfaces')
return
tip = max([x.height() for x in self.blockchains.values()])
if tip >=0:
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
self.request_header(interface, min(tip, height - 1))
else:
chain = self.blockchains[0]
if chain.catch_up is None:
chain.catch_up = interface
interface.mode = 'catch_up'
interface.blockchain = chain
self.request_header(interface, 0)
def on_notify_header(self, interface, header):
height = header.get('block_height')
if not height:
return
interface.tip_header = header
interface.tip = height
if interface.mode != 'default':
return
b = blockchain.check_header(header)
if b:
interface.blockchain = b
self.switch_lagging_interface()
self.notify('interfaces')
return
b = blockchain.can_connect(header)
if b:
interface.blockchain = b
b.save_header(header)
self.switch_lagging_interface()
self.notify('updated')
self.notify('interfaces')
return
tip = max([x.height() for x in self.blockchains.values()])
if tip >=0:
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
self.request_header(interface, min(tip, height - 1))
else:
chain = self.blockchains[0]
if chain.catch_up is None:
chain.catch_up = interface
interface.mode = 'catch_up'
interface.blockchain = chain
self.request_header(interface, 0)
def on_notify_header(self, interface, header):
height = header.get('block_height')
if not height:
return
interface.tip_header = header
interface.tip = height
if interface.mode != 'default':
return
b = blockchain.check_header(header)
if b:
interface.blockchain = b
self.notify('interfaces')
self.switch_lagging_interface()
return
b = blockchain.can_connect(header)
if b:
interface.blockchain = b
b.save_header(header)
self.notify('updated')
self.notify('interfaces')
self.switch_lagging_interface()
return
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
self.request_header(interface, height - 1) # should be max(heights)
def on_get_header(self, interface, response):
'''Handle receiving a single block header'''
header = response.get('result')
if not header:
interface.print_error(response)
self.connection_down(interface.server)
return
height = header.get('block_height')
if interface.request != height:
interface.print_error("unsolicited header",interface.request, height)
self.connection_down(interface.server)
return
chain = blockchain.check_header(header)
if interface.mode == 'backward':
if chain:
interface.print_error("binary search")
interface.mode = 'binary'
interface.blockchain = chain
interface.good = height
next_height = (interface.bad + interface.good) // 2
else:
if height == 0:
self.connection_down(interface.server)
next_height = None
else:
interface.bad = height
interface.bad_header = header
delta = interface.tip - height
next_height = max(0, interface.tip - 2 * delta)
elif interface.mode == 'binary':
if chain:
interface.good = height
interface.blockchain = chain
else:
interface.bad = height
interface.bad_header = header
if interface.bad != interface.good + 1:
next_height = (interface.bad + interface.good) // 2
elif not interface.blockchain.can_connect(interface.bad_header, check_height=False):
self.connection_down(interface.server)
next_height = None
else:
branch = self.blockchains.get(interface.bad)
if branch is not None:
if branch.check_header(interface.bad_header):
interface.print_error('joining chain', interface.bad)
next_height = None
elif branch.parent().check_header(header):
interface.print_error('reorg', interface.bad, interface.tip)
interface.blockchain = branch.parent()
next_height = None
else:
interface.print_error('checkpoint conflicts with existing fork', branch.path())
branch.write('', 0)
branch.save_header(interface.bad_header)
interface.mode = 'catch_up'
interface.blockchain = branch
next_height = interface.bad + 1
interface.blockchain.catch_up = interface.server
else:
bh = interface.blockchain.height()
next_height = None
if bh > interface.good:
if not interface.blockchain.check_header(interface.bad_header):
b = interface.blockchain.fork(interface.bad_header)
self.blockchains[interface.bad] = b
interface.blockchain = b
interface.print_error("new chain", b.checkpoint)
interface.mode = 'catch_up'
next_height = interface.bad + 1
interface.blockchain.catch_up = interface.server
else:
assert bh == interface.good
if interface.blockchain.catch_up is None and bh < interface.tip:
interface.print_error("catching up from %d"% (bh + 1))
interface.mode = 'catch_up'
next_height = bh + 1
interface.blockchain.catch_up = interface.server
self.notify('updated')
elif interface.mode == 'catch_up':
can_connect = interface.blockchain.can_connect(header)
if can_connect:
interface.blockchain.save_header(header)
next_height = height + 1 if height < interface.tip else None
else:
# go back
interface.print_error("cannot connect", height)
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
next_height = height - 1
if next_height is None:
# exit catch_up state
interface.print_error('catch up done', interface.blockchain.height())
interface.blockchain.catch_up = None
self.switch_lagging_interface()
self.notify('updated')
elif interface.mode == 'default':
if not ok:
interface.print_error("default: cannot connect %d"% height)
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
next_height = height - 1
else:
interface.print_error("we are ok", height, interface.request)
next_height = None
else:
raise BaseException(interface.mode)
# If not finished, get the next header
if next_height:
if interface.mode == 'catch_up' and interface.tip > next_height + 50:
self.request_chunk(interface, next_height // 2016)
else:
self.request_header(interface, next_height)
else:
interface.mode = 'default'
interface.request = None
self.notify('updated')
# refresh network dialog
self.notify('interfaces')
def on_get_header(self, interface, response):
'''Handle receiving a single block header'''
header = response.get('result')
if not header:
interface.print_error(response)
self.connection_down(interface.server)
return
height = header.get('block_height')
if interface.request != height:
interface.print_error("unsolicited header",interface.request, height)
self.connection_down(interface.server)
return
chain = blockchain.check_header(header)
if interface.mode == 'backward':
if chain:
interface.print_error("binary search")
interface.mode = 'binary'
interface.blockchain = chain
interface.good = height
next_height = (interface.bad + interface.good) // 2
else:
if height == 0:
self.connection_down(interface.server)
next_height = None
else:
interface.bad = height
interface.bad_header = header
delta = interface.tip - height
next_height = max(0, interface.tip - 2 * delta)
elif interface.mode == 'binary':
if chain:
interface.good = height
interface.blockchain = chain
else:
interface.bad = height
interface.bad_header = header
if interface.bad != interface.good + 1:
next_height = (interface.bad + interface.good) // 2
else:
branch = self.blockchains.get(interface.bad)
if branch is not None:
if branch.check_header(interface.bad_header):
interface.print_error('joining chain', interface.bad)
elif branch.parent().check_header(header):
interface.print_error('reorg', interface.bad, interface.tip)
interface.blockchain = branch.parent()
else:
# should not happen
raise BaseException('error')
next_height = None
else:
bh = interface.blockchain.height()
next_height = None
if bh > interface.good:
if not interface.blockchain.check_header(interface.bad_header):
if interface.blockchain.can_connect(interface.bad_header, check_height=False):
b = interface.blockchain.fork(interface.bad)
b.save_header(interface.bad_header)
self.blockchains[interface.bad] = b
interface.blockchain = b
interface.print_error("new chain", b.checkpoint)
interface.mode = 'catch_up'
next_height = interface.bad + 1
interface.blockchain.catch_up = interface.server
else:
assert bh == interface.good
if interface.blockchain.catch_up is None and bh < interface.tip:
interface.print_error("catching up from %d"% (bh + 1))
interface.mode = 'catch_up'
next_height = bh + 1
interface.blockchain.catch_up = interface.server
self.notify('updated')
elif interface.mode == 'catch_up':
can_connect = interface.blockchain.can_connect(header)
if can_connect:
interface.blockchain.save_header(header)
next_height = height + 1 if height < interface.tip else None
else:
# go back
interface.print_error("cannot connect", height)
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
next_height = height - 1
if next_height is None:
# exit catch_up state
interface.print_error('catch up done', interface.blockchain.height())
interface.blockchain.catch_up = None
self.switch_lagging_interface()
self.notify('updated')
elif interface.mode == 'default':
if not ok:
interface.print_error("default: cannot connect %d"% height)
interface.mode = 'backward'
interface.bad = height
interface.bad_header = header
next_height = height - 1
else:
interface.print_error("we are ok", height, interface.request)
next_height = None
else:
raise BaseException(interface.mode)
# If not finished, get the next header
if next_height:
if interface.mode == 'catch_up' and interface.tip > next_height + 50:
self.request_chunk(interface, next_height // 2016)
else:
self.request_header(interface, next_height)
else:
interface.mode = 'default'
interface.request = None
self.notify('updated')
# refresh network dialog
self.notify('interfaces')
