def process_payment(iou: Optional[IOU],
pathfinding_service: PathfindingService,
service_fee: TokenAmount) -> None:
if service_fee == 0:
return
if iou is None:
raise exceptions.MissingIOU
# Basic IOU validity checks
if not is_same_address(iou.receiver, pathfinding_service.address):
raise exceptions.WrongIOURecipient(
expected=pathfinding_service.address)
if not iou.is_signature_valid():
raise exceptions.InvalidSignature
# Compare with known IOU
active_iou = pathfinding_service.database.get_iou(sender=iou.sender,
claimed=False)
if active_iou:
if active_iou.expiration_block != iou.expiration_block:
raise exceptions.UseThisIOU(iou=active_iou)
expected_amount = active_iou.amount + service_fee
else:
claimed_iou = pathfinding_service.database.get_iou(
sender=iou.sender,
expiration_block=iou.expiration_block,
claimed=True)
if claimed_iou:
raise exceptions.IOUAlreadyClaimed
min_expiry = pathfinding_service.web3.eth.blockNumber + MIN_IOU_EXPIRY
if iou.expiration_block < min_expiry:
raise exceptions.IOUExpiredTooEarly(min_expiry=min_expiry)
expected_amount = service_fee
if iou.amount < expected_amount:
raise exceptions.InsufficientServicePayment(
expected_amount=expected_amount)
# Check client's deposit in UserDeposit contract
udc = pathfinding_service.user_deposit_contract
udc_balance = udc.functions.effectiveBalance(iou.sender).call()
required_deposit = round(expected_amount * UDC_SECURITY_MARGIN_FACTOR)
if udc_balance < required_deposit:
raise exceptions.DepositTooLow(required_deposit=required_deposit)
log.info(
"Received service fee",
sender=iou.sender,
expected_amount=expected_amount,
total_amount=iou.amount,
added_amount=expected_amount - service_fee,
)
# Save latest IOU
iou.claimed = False
pathfinding_service.database.upsert_iou(iou)
def process_payment(iou_dict: dict, pathfinding_service: PathfindingService):
if pathfinding_service.service_fee == 0:
return
if iou_dict is None:
raise exceptions.MissingIOU
# Basic IOU validity checks
iou, errors = IOU.Schema().load(iou_dict)
if errors:
raise exceptions.InvalidRequest(**errors)
if iou.receiver != pathfinding_service.address:
raise exceptions.WrongIOURecipient(
expected=pathfinding_service.address)
if not iou.is_signature_valid():
raise exceptions.InvalidSignature
# Compare with known IOU
active_iou = pathfinding_service.database.get_iou(
sender=iou.sender,
claimed=False,
)
if active_iou:
if active_iou.expiration_block != iou.expiration_block:
raise exceptions.UseThisIOU(iou=active_iou)
expected_amount = active_iou.amount + pathfinding_service.service_fee
else:
claimed_iou = pathfinding_service.database.get_iou(
sender=iou.sender,
expiration_block=iou.expiration_block,
claimed=True,
)
if claimed_iou:
raise exceptions.IOUAlreadyClaimed
min_expiry = pathfinding_service.web3.eth.blockNumber + MIN_IOU_EXPIRY
if iou.expiration_block < min_expiry:
raise exceptions.IOUExpiredTooEarly(min_expiry=min_expiry)
expected_amount = pathfinding_service.service_fee
if iou.amount < expected_amount:
raise exceptions.InsufficientServicePayment(
expected_amount=expected_amount)
# Check client's deposit in UserDeposit contract
udc = pathfinding_service.user_deposit_contract
udc_balance = udc.functions.effectiveBalance(iou.sender).call()
required_deposit = round(expected_amount * UDC_SECURITY_MARGIN_FACTOR)
if udc_balance < required_deposit:
raise exceptions.DepositTooLow(required_deposit=required_deposit)
# Save latest IOU
iou.claimed = False
pathfinding_service.database.upsert_iou(iou)
def process_payment( # pylint: disable=too-many-branches
iou: Optional[IOU],
pathfinding_service: PathfindingService,
service_fee: TokenAmount,
one_to_n_address: Address,
) -> None:
if service_fee == 0:
return
if iou is None:
raise exceptions.MissingIOU
# Basic IOU validity checks
if not is_same_address(iou.receiver, pathfinding_service.address):
raise exceptions.WrongIOURecipient(
expected=pathfinding_service.address)
if iou.chain_id != pathfinding_service.chain_id:
raise exceptions.UnsupportedChainID(
expected=pathfinding_service.chain_id)
if iou.one_to_n_address != one_to_n_address:
raise exceptions.WrongOneToNAddress(expected=one_to_n_address,
got=iou.one_to_n_address)
if not iou.is_signature_valid():
raise exceptions.InvalidSignature
# Compare with known IOU
active_iou = pathfinding_service.database.get_iou(sender=iou.sender,
claimed=False)
if active_iou:
if active_iou.expiration_block != iou.expiration_block:
raise exceptions.UseThisIOU(iou=active_iou)
expected_amount = active_iou.amount + service_fee
else:
claimed_iou = pathfinding_service.database.get_iou(
sender=iou.sender,
expiration_block=iou.expiration_block,
claimed=True)
if claimed_iou:
raise exceptions.IOUAlreadyClaimed
min_expiry = pathfinding_service.web3.eth.blockNumber + MIN_IOU_EXPIRY
if iou.expiration_block < min_expiry:
raise exceptions.IOUExpiredTooEarly(min_expiry=min_expiry)
expected_amount = service_fee
if iou.amount < expected_amount:
raise exceptions.InsufficientServicePayment(
expected_amount=expected_amount)
# Check client's deposit in UserDeposit contract
udc = pathfinding_service.user_deposit_contract
latest_block = pathfinding_service.web3.eth.blockNumber
udc_balance = get_pessimistic_udc_balance(
udc=udc,
address=iou.sender,
from_block=latest_block - pathfinding_service.required_confirmations,
to_block=latest_block,
)
required_deposit = round(expected_amount * UDC_SECURITY_MARGIN_FACTOR_PFS)
if udc_balance < required_deposit:
raise exceptions.DepositTooLow(required_deposit=required_deposit)
log.info(
"Received service fee",
sender=iou.sender,
expected_amount=expected_amount,
total_amount=iou.amount,
added_amount=expected_amount - service_fee,
)
# Save latest IOU
iou.claimed = False
pathfinding_service.database.upsert_iou(iou)
def process_payment( # pylint: disable=too-many-branches
iou: Optional[IOU],
pathfinding_service: PathfindingService,
service_fee: TokenAmount,
one_to_n_address: Address,
) -> None:
if service_fee == 0:
if iou is not None:
log.debug(
"Discarding IOU, service fee is 0",
sender=to_checksum_address(iou.sender),
total_amount=iou.amount,
claimable_until=iou.claimable_until,
)
else:
log.debug("No IOU and service fee is 0")
return
if iou is None:
raise exceptions.MissingIOU
log.debug(
"Checking IOU",
sender=to_checksum_address(iou.sender),
total_amount=iou.amount,
claimable_until=iou.claimable_until,
)
# Basic IOU validity checks
if not is_same_address(iou.receiver, pathfinding_service.address):
raise exceptions.WrongIOURecipient(expected=pathfinding_service.address)
if iou.chain_id != pathfinding_service.chain_id:
raise exceptions.UnsupportedChainID(expected=pathfinding_service.chain_id)
if iou.one_to_n_address != one_to_n_address:
raise exceptions.WrongOneToNAddress(expected=one_to_n_address, got=iou.one_to_n_address)
if not iou.is_signature_valid():
raise exceptions.InvalidSignature
# Compare with known IOU
latest_block = pathfinding_service.blockchain_state.latest_committed_block
active_iou = pathfinding_service.database.get_iou(sender=iou.sender, claimed=False)
if active_iou:
if active_iou.claimable_until != iou.claimable_until:
raise exceptions.UseThisIOU(iou=active_iou.Schema().dump(active_iou))
expected_amount = active_iou.amount + service_fee
else:
claimed_iou = pathfinding_service.database.get_iou(
sender=iou.sender, claimable_until=iou.claimable_until, claimed=True
)
if claimed_iou:
raise exceptions.IOUAlreadyClaimed
min_expiry = get_posix_utc_time_now() + MIN_IOU_EXPIRY
if iou.claimable_until < min_expiry:
raise exceptions.IOUExpiredTooEarly(
min_expiry=min_expiry, claimable_until_received=iou.claimable_until
)
expected_amount = service_fee
if iou.amount < expected_amount:
raise exceptions.InsufficientServicePayment(
expected_amount=expected_amount, actual_amount=iou.amount
)
# Check client's deposit in UserDeposit contract
udc = pathfinding_service.user_deposit_contract
udc_balance = get_pessimistic_udc_balance(
udc=udc,
address=iou.sender,
from_block=BlockNumber(latest_block - pathfinding_service.required_confirmations),
to_block=latest_block,
)
required_deposit = round(expected_amount * UDC_SECURITY_MARGIN_FACTOR_PFS)
if udc_balance < required_deposit:
raise exceptions.DepositTooLow(
required_deposit=required_deposit, seen_deposit=udc_balance, block_number=latest_block
)
log.info(
"Received service fee",
sender=iou.sender,
expected_amount=expected_amount,
total_amount=iou.amount,
added_amount=expected_amount - service_fee,
)
# Save latest IOU
iou.claimed = False
pathfinding_service.database.upsert_iou(iou)