def GetEthValidatorsSignature(self, val_msg, context):
"""Get a vote(signature) from the validator to update the set of
validators in the Aergo bridge contract bridging to Ethereum
"""
if not (self.auto_update and self.oracle_update):
return Approval(error="Validators update not enabled")
err_msg = self.data_sources.is_valid_eth_validators(val_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\U0001f58b validator set", self.aergo_net, err_msg)
return Approval(error=err_msg)
# sign validators
data = ""
for val in val_msg.validators:
data += val
data += str(val_msg.destination_nonce) + self.aergo_oracle_id + "V"
data_bytes = bytes(data, 'utf-8')
h = hashlib.sha256(data_bytes).digest()
sig = self.aergo_signer.sign(h)
approval = Approval(address=self.aergo_signer.address, sig=sig)
logger.info(success_log_template, self.validator_index, "true",
"\U0001f58b validator set", self.aergo_net,
val_msg.validators, val_msg.destination_nonce)
return approval
def GetAergoOracleSignature(self, oracle_msg, context):
"""Get a vote(signature) from the validator to update the
oracle controlling the Ethereum bridge contract bridging to Aergo
"""
if not (self.auto_update and self.oracle_update):
return Approval(error="Oracle update not enabled")
err_msg = self.data_sources.is_valid_aergo_oracle(oracle_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\U0001f58b oracle change", self.eth_net, err_msg)
return Approval(error=err_msg)
# sign oracle
oracle = bytes.fromhex(oracle_msg.oracle[2:])
msg_bytes = oracle \
+ oracle_msg.destination_nonce.to_bytes(32, byteorder='big') \
+ self.eth_oracle_id \
+ bytes("O", 'utf-8')
h = keccak(msg_bytes)
sig = self.eth_signer.sign(h)
approval = Approval(address=self.eth_signer.address,
sig=bytes(sig.signature))
logger.info(success_log_template, self.validator_index, "true",
"\U0001f58b oracle change", self.eth_net,
oracle_msg.oracle, oracle_msg.destination_nonce)
return approval
def GetAergoValidatorsSignature(self, val_msg, context):
"""Get a vote(signature) from the validator to update the set of
validators in the Ethereum bridge contract bridging to Aergo
"""
if not (self.auto_update and self.oracle_update):
return Approval(error="Validators update not enabled")
err_msg = self.data_sources.is_valid_aergo_validators(val_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\U0001f58b validator set", self.eth_net, err_msg)
return Approval(error=err_msg)
# sign validators
concat_vals = b''
for val in val_msg.validators:
concat_vals += pad_bytes(b'\x00', 32, bytes.fromhex(val[2:]))
msg_bytes = concat_vals \
+ val_msg.destination_nonce.to_bytes(32, byteorder='big') \
+ self.eth_oracle_id \
+ bytes("V", 'utf-8')
h = keccak(msg_bytes)
sig = self.eth_signer.sign(h)
approval = Approval(address=self.eth_signer.address,
sig=bytes(sig.signature))
logger.info(success_log_template, self.validator_index, "true",
"\U0001f58b validator set", self.eth_net,
val_msg.validators, val_msg.destination_nonce)
return approval
def GetEthAnchorSignature(self, anchor, context):
""" Verifies an ethereum anchor and signs it to be broadcasted on aergo
aergo and ethereum nodes must be trusted.
Note:
Anchoring service has priority over settings update because it can
take time to gather signatures for settings update or a validator
may not be aware settings have changed.
So the current onchain bridge settings are queries every time.
"""
if not self.anchoring_on:
return Approval(error="Anchoring not enabled")
err_msg = self.data_sources.is_valid_eth_anchor(anchor)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\u2693 anchor", self.aergo_net, err_msg)
return Approval(error=err_msg)
# sign anchor and return approval
msg = bytes(
anchor.root.hex() + ',' + str(anchor.height) +
str(anchor.destination_nonce) + self.aergo_oracle_id + "R",
'utf-8')
h = hashlib.sha256(msg).digest()
sig = self.aergo_signer.sign(h)
approval = Approval(address=self.aergo_signer.address, sig=sig)
logger.info(
success_log_template, self.validator_index, "true",
"\u2693 anchor", self.aergo_net,
"{{\"root\": \"0x{}\", \"height\": {}}}".format(
anchor.root.hex(), anchor.height), anchor.destination_nonce)
return approval
def GetAergoTFinalSignature(self, tempo_msg, context):
"""Get a vote(signature) from the validator to update the t_final
setting in the Ethereum bridge contract bridging to Aergo
"""
if not self.auto_update:
return Approval(error="Setting update not enabled")
err_msg = self.data_sources.is_valid_aergo_t_final(tempo_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\u231B t_final", self.eth_net, err_msg)
return Approval(error=err_msg)
return self.sign_aergo_tempo(tempo_msg, 't_final', 'F')
def GetEthTAnchorSignature(self, tempo_msg, context):
"""Get a vote(signature) from the validator to update the t_anchor
setting in the Aergo bridge contract bridging to Ethereum
"""
if not self.auto_update:
return Approval(error="Setting update not enabled")
err_msg = self.data_sources.is_valid_eth_t_anchor(tempo_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\u231B t_anchor", self.aergo_net, err_msg)
return Approval(error=err_msg)
return self.sign_eth_tempo(tempo_msg, 't_anchor', "A")
def sign_eth_tempo(self, tempo_msg, tempo_str, tempo_id):
# sign anchor and return approval
msg = bytes(
str(tempo_msg.tempo) + str(tempo_msg.destination_nonce) +
self.aergo_oracle_id + tempo_id, 'utf-8')
h = hashlib.sha256(msg).digest()
sig = self.aergo_signer.sign(h)
approval = Approval(address=self.aergo_signer.address, sig=sig)
logger.info(success_log_template, self.validator_index, "true",
"\u231B " + tempo_str, self.aergo_net, tempo_msg.tempo,
tempo_msg.destination_nonce)
return approval
def sign_aergo_tempo(self, tempo_msg, tempo_str, tempo_id):
# sign anchor and return approval
msg_bytes = tempo_msg.tempo.to_bytes(32, byteorder='big') \
+ tempo_msg.destination_nonce.to_bytes(32, byteorder='big') \
+ self.eth_oracle_id \
+ bytes(tempo_id, 'utf-8')
h = keccak(msg_bytes)
sig = self.eth_signer.sign(h)
approval = Approval(address=self.eth_signer.address,
sig=bytes(sig.signature))
logger.info(success_log_template, self.validator_index, "true",
"\u231B " + tempo_str, self.eth_net, tempo_msg.tempo,
tempo_msg.destination_nonce)
return approval
def GetEthOracleSignature(self, oracle_msg, context):
"""Get a vote(signature) from the validator to update the
oracle controlling the Aergo bridge contract bridging to Ethereum
"""
if not (self.auto_update and self.oracle_update):
return Approval(error="Oracle update not enabled")
err_msg = self.data_sources.is_valid_eth_oracle(oracle_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\U0001f58b oracle change", self.aergo_net, err_msg)
return Approval(error=err_msg)
# sign validators
data = oracle_msg.oracle \
+ str(oracle_msg.destination_nonce) + self.aergo_oracle_id + "O"
data_bytes = bytes(data, 'utf-8')
h = hashlib.sha256(data_bytes).digest()
sig = self.aergo_signer.sign(h)
approval = Approval(address=self.aergo_signer.address, sig=sig)
logger.info(success_log_template, self.validator_index, "true",
"\U0001f58b oracle change", self.aergo_net,
oracle_msg.oracle, oracle_msg.destination_nonce)
return approval
def GetAergoUnfreezeFeeSignature(self, new_fee_msg, context):
"""Get a vote(signature) from the validator to update the unfreezeFee
setting in the Aergo bridge contract bridging to Ethereum
"""
if not self.auto_update:
return Approval(error="Unfreeze fee update not enabled")
err_msg = self.data_sources.is_valid_unfreeze_fee(new_fee_msg)
if err_msg is not None:
logger.warning(error_log_template, self.validator_index, "false",
"\U0001f4a7 unfreeze fee", self.aergo_net, err_msg)
return Approval(error=err_msg)
# sign anchor and return approval
msg = bytes(
str(new_fee_msg.fee) + str(new_fee_msg.destination_nonce) +
self.aergo_oracle_id + "UF", 'utf-8')
h = hashlib.sha256(msg).digest()
sig = self.aergo_signer.sign(h)
approval = Approval(address=self.aergo_signer.address, sig=sig)
logger.info(success_log_template, self.validator_index, "true",
"\U0001f4a7 unfreeze fee", self.aergo_net, new_fee_msg.fee,
new_fee_msg.destination_nonce)
return approval
