def can_open_channel(registry_address: PaymentNetworkID,
token_address: TokenAddress, creator_address: Address,
partner_address: Address,
settle_timeout: BlockTimeout, raiden) -> TokenNetwork:
if settle_timeout < raiden.config["reveal_timeout"] * 2:
raise InvalidSettleTimeout(
"settle_timeout can not be smaller than double the reveal_timeout"
)
if not is_binary_address(registry_address):
raise InvalidAddress(
"Expected binary address format for registry in channel open")
if not is_binary_address(token_address):
raise InvalidAddress(
"Expected binary address format for token in channel open")
if not is_binary_address(partner_address):
raise InvalidAddress(
"Expected binary address format for partner in channel open")
if not is_binary_address(creator_address):
raise InvalidAddress(
"Expected binary address format for creator in channel open")
chain_state = views.state_from_raiden(raiden)
channel_state = views.get_channelstate_for(
chain_state=chain_state,
payment_network_id=registry_address,
creator_address=creator_address,
token_address=token_address,
partner_address=partner_address,
)
if channel_state:
raise DuplicatedChannelError(
"Channel with given partner address already exists")
registry: TokenNetworkRegistry = raiden.chain.token_network_registry(
registry_address)
token_network = raiden.chain.token_network(
registry.get_token_network(token_address))
if token_network is None:
raise TokenNotRegistered(
"Token network for token %s does not exist" %
to_checksum_address(token_address))
return token_network
def channel_open(
self,
registry_address: typing.PaymentNetworkID,
token_address: typing.TokenAddress,
partner_address: typing.Address,
settle_timeout: typing.BlockTimeout = None,
retry_timeout: typing.NetworkTimeout = DEFAULT_RETRY_TIMEOUT,
) -> typing.ChannelID:
""" Open a channel with the peer at `partner_address`
with the given `token_address`.
"""
if settle_timeout is None:
settle_timeout = self.raiden.config['settle_timeout']
if settle_timeout < self.raiden.config['reveal_timeout'] * 2:
raise InvalidSettleTimeout(
'settle_timeout can not be smaller than double the reveal_timeout',
)
if not is_binary_address(registry_address):
raise InvalidAddress(
'Expected binary address format for registry in channel open')
if not is_binary_address(token_address):
raise InvalidAddress(
'Expected binary address format for token in channel open')
if not is_binary_address(partner_address):
raise InvalidAddress(
'Expected binary address format for partner in channel open')
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state,
registry_address,
token_address,
partner_address,
)
if channel_state:
raise DuplicatedChannelError(
'Channel with given partner address already exists')
registry = self.raiden.chain.token_network_registry(registry_address)
token_network_address = registry.get_token_network(token_address)
if token_network_address is None:
raise TokenNotRegistered(
'Token network for token %s does not exist' %
to_checksum_address(token_address), )
token_network = self.raiden.chain.token_network(
registry.get_token_network(token_address), )
has_enough_reserve, estimated_required_reserve = has_enough_gas_reserve(
self.raiden,
channels_to_open=1,
)
if not has_enough_reserve:
raise InsufficientGasReserve((
'The account balance is below the estimated amount necessary to '
'finish the lifecycles of all active channels. A balance of at '
f'least {estimated_required_reserve} wei is required.'))
try:
token_network.new_netting_channel(
partner_address,
settle_timeout,
)
except DuplicatedChannelError:
log.info('partner opened channel first')
waiting.wait_for_newchannel(
self.raiden,
registry_address,
token_address,
partner_address,
retry_timeout,
)
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state,
registry_address,
token_address,
partner_address,
)
return channel_state.identifier
def channel_open(
self,
registry_address: PaymentNetworkID,
token_address: TokenAddress,
partner_address: Address,
settle_timeout: BlockTimeout = None,
retry_timeout: NetworkTimeout = DEFAULT_RETRY_TIMEOUT,
) -> ChannelID:
""" Open a channel with the peer at `partner_address`
with the given `token_address`.
"""
if settle_timeout is None:
settle_timeout = self.raiden.config["settle_timeout"]
if settle_timeout < self.raiden.config["reveal_timeout"] * 2:
raise InvalidSettleTimeout(
"settle_timeout can not be smaller than double the reveal_timeout"
)
if not is_binary_address(registry_address):
raise InvalidAddress("Expected binary address format for registry in channel open")
if not is_binary_address(token_address):
raise InvalidAddress("Expected binary address format for token in channel open")
if not is_binary_address(partner_address):
raise InvalidAddress("Expected binary address format for partner in channel open")
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state=chain_state,
payment_network_id=registry_address,
token_address=token_address,
partner_address=partner_address,
)
if channel_state:
raise DuplicatedChannelError("Channel with given partner address already exists")
registry = self.raiden.chain.token_network_registry(registry_address)
token_network_address = registry.get_token_network(token_address)
if token_network_address is None:
raise TokenNotRegistered(
"Token network for token %s does not exist" % to_checksum_address(token_address)
)
token_network = self.raiden.chain.token_network(registry.get_token_network(token_address))
with self.raiden.gas_reserve_lock:
has_enough_reserve, estimated_required_reserve = has_enough_gas_reserve(
self.raiden, channels_to_open=1
)
if not has_enough_reserve:
raise InsufficientGasReserve(
(
"The account balance is below the estimated amount necessary to "
"finish the lifecycles of all active channels. A balance of at "
f"least {estimated_required_reserve} wei is required."
)
)
try:
token_network.new_netting_channel(
partner=partner_address,
settle_timeout=settle_timeout,
given_block_identifier=views.state_from_raiden(self.raiden).block_hash,
)
except DuplicatedChannelError:
log.info("partner opened channel first")
waiting.wait_for_newchannel(
raiden=self.raiden,
payment_network_id=registry_address,
token_address=token_address,
partner_address=partner_address,
retry_timeout=retry_timeout,
)
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state=chain_state,
payment_network_id=registry_address,
token_address=token_address,
partner_address=partner_address,
)
assert channel_state, f"channel {channel_state} is gone"
return channel_state.identifier
def channel_open(
self,
registry_address: typing.PaymentNetworkID,
token_address: typing.TokenAddress,
partner_address: typing.Address,
settle_timeout: typing.BlockTimeout = None,
reveal_timeout: typing.BlockTimeout = None,
retry_timeout: typing.NetworkTimeout = DEFAULT_RETRY_TIMEOUT,
) -> typing.ChannelID:
""" Open a channel with the peer at `partner_address`
with the given `token_address`.
"""
if reveal_timeout is None:
reveal_timeout = self.raiden.config['reveal_timeout']
if settle_timeout is None:
settle_timeout = self.raiden.config['settle_timeout']
if settle_timeout <= reveal_timeout:
raise InvalidSettleTimeout(
'reveal_timeout can not be larger-or-equal to settle_timeout',
)
if not is_binary_address(registry_address):
raise InvalidAddress('Expected binary address format for registry in channel open')
if not is_binary_address(token_address):
raise InvalidAddress('Expected binary address format for token in channel open')
if not is_binary_address(partner_address):
raise InvalidAddress('Expected binary address format for partner in channel open')
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state,
registry_address,
token_address,
partner_address,
)
if channel_state:
raise DuplicatedChannelError('Channel with given partner address already exists')
registry = self.raiden.chain.token_network_registry(registry_address)
token_network_address = registry.get_token_network(token_address)
if token_network_address is None:
raise TokenNotRegistered(
'Token network for token %s does not exist' % to_checksum_address(token_address),
)
token_network = self.raiden.chain.token_network(
registry.get_token_network(token_address),
)
try:
token_network.new_netting_channel(
partner_address,
settle_timeout,
)
except DuplicatedChannelError:
log.info('partner opened channel first')
waiting.wait_for_newchannel(
self.raiden,
registry_address,
token_address,
partner_address,
retry_timeout,
)
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state,
registry_address,
token_address,
partner_address,
)
return channel_state.identifier
def channel_open(
self,
registry_address: TokenNetworkRegistryAddress,
token_address: TokenAddress,
partner_address: Address,
settle_timeout: BlockTimeout = None,
reveal_timeout: BlockTimeout = None,
retry_timeout: NetworkTimeout = DEFAULT_RETRY_TIMEOUT,
) -> ChannelID:
""" Open a channel with the peer at `partner_address`
with the given `token_address`.
"""
if settle_timeout is None:
settle_timeout = self.raiden.config.settle_timeout
if reveal_timeout is None:
reveal_timeout = self.raiden.config.reveal_timeout
if reveal_timeout <= 0:
raise InvalidRevealTimeout(
"reveal_timeout should be larger than zero")
if settle_timeout < reveal_timeout * 2:
raise InvalidSettleTimeout(
"`settle_timeout` can not be smaller than double the "
"`reveal_timeout`.\n "
"\n "
"The setting `reveal_timeout` determines the maximum number of "
"blocks it should take a transaction to be mined when the "
"blockchain is under congestion. This setting determines the "
"when a node must go on-chain to register a secret, and it is "
"therefore the lower bound of the lock expiration. The "
"`settle_timeout` determines when a channel can be settled "
"on-chain, for this operation to be safe all locks must have "
"been resolved, for this reason the `settle_timeout` has to be "
"larger than `reveal_timeout`.")
if not is_binary_address(registry_address):
raise InvalidBinaryAddress(
"Expected binary address format for registry in channel open")
if not is_binary_address(token_address):
raise InvalidBinaryAddress(
"Expected binary address format for token in channel open")
if not is_binary_address(partner_address):
raise InvalidBinaryAddress(
"Expected binary address format for partner in channel open")
confirmed_block_identifier = views.get_confirmed_blockhash(self.raiden)
registry = self.raiden.proxy_manager.token_network_registry(
registry_address, block_identifier=confirmed_block_identifier)
settlement_timeout_min = registry.settlement_timeout_min(
block_identifier=confirmed_block_identifier)
settlement_timeout_max = registry.settlement_timeout_max(
block_identifier=confirmed_block_identifier)
if settle_timeout < settlement_timeout_min:
raise InvalidSettleTimeout(
f"Settlement timeout should be at least {settlement_timeout_min}"
)
if settle_timeout > settlement_timeout_max:
raise InvalidSettleTimeout(
f"Settlement timeout exceeds max of {settlement_timeout_max}")
token_network_address = registry.get_token_network(
token_address=token_address,
block_identifier=confirmed_block_identifier)
if token_network_address is None:
raise TokenNotRegistered(
"Token network for token %s does not exist" %
to_checksum_address(token_address))
token_network = self.raiden.proxy_manager.token_network(
address=token_network_address,
block_identifier=confirmed_block_identifier)
safety_deprecation_switch = token_network.safety_deprecation_switch(
block_identifier=confirmed_block_identifier)
if safety_deprecation_switch:
msg = (
"This token_network has been deprecated. New channels cannot be "
"open for this network, usage of the newly deployed token "
"network contract is highly encouraged.")
raise TokenNetworkDeprecated(msg)
duplicated_channel = self.is_already_existing_channel(
token_network_address=token_network_address,
partner_address=partner_address,
block_identifier=confirmed_block_identifier,
)
if duplicated_channel:
raise DuplicatedChannelError(
f"A channel with {to_checksum_address(partner_address)} for token "
f"{to_checksum_address(token_address)} already exists. "
f"(At blockhash: {confirmed_block_identifier.hex()})")
has_enough_reserve, estimated_required_reserve = has_enough_gas_reserve(
self.raiden, channels_to_open=1)
if not has_enough_reserve:
raise InsufficientGasReserve(
"The account balance is below the estimated amount necessary to "
"finish the lifecycles of all active channels. A balance of at "
f"least {estimated_required_reserve} wei is required.")
try:
token_network.new_netting_channel(
partner=partner_address,
settle_timeout=settle_timeout,
given_block_identifier=confirmed_block_identifier,
)
except DuplicatedChannelError:
log.info("partner opened channel first")
except RaidenRecoverableError:
# The channel may have been created in the pending block.
duplicated_channel = self.is_already_existing_channel(
token_network_address=token_network_address,
partner_address=partner_address)
if duplicated_channel:
log.info("Channel has already been opened")
else:
raise
waiting.wait_for_newchannel(
raiden=self.raiden,
token_network_registry_address=registry_address,
token_address=token_address,
partner_address=partner_address,
retry_timeout=retry_timeout,
)
chain_state = views.state_from_raiden(self.raiden)
channel_state = views.get_channelstate_for(
chain_state=chain_state,
token_network_registry_address=registry_address,
token_address=token_address,
partner_address=partner_address,
)
assert channel_state, f"channel {channel_state} is gone"
self.raiden.set_channel_reveal_timeout(
canonical_identifier=channel_state.canonical_identifier,
reveal_timeout=reveal_timeout)
return channel_state.identifier