def make_deposit_transfer(transfer_amount,
token,
receive_account,
transfer_mode=None,
automatically_resolve_complete=True,
uuid=None,
fiat_ramp=None):
"""
This is used for a user depositing funds to their Sempo wallet. Only interacts with Sempo float.
:param transfer_amount:
:param token:
:param receive_account:
:param transfer_mode:
:param automatically_resolve_complete:
:param uuid:
:param fiat_ramp: A FiatRamp Object to tie to credit transfer
:return:
"""
transfer = CreditTransfer(amount=transfer_amount,
token=token,
recipient_user=receive_account,
transfer_type=TransferTypeEnum.DEPOSIT,
transfer_mode=transfer_mode,
uuid=uuid,
fiat_ramp=fiat_ramp)
if automatically_resolve_complete:
transfer.resolve_as_completed()
return transfer
def migrate_balances(self, ge_address_to_user: dict):
org = Organisation.query.get(self.sempo_organisation_id)
token = org.token
ge_address_to_user.pop(None, None)
addresses = list(ge_address_to_user.keys())
for user_address in addresses:
try:
balance_wei = 0
for ge_token in GE_MIGRATION_TOKENS.keys():
contract_address = GE_MIGRATION_TOKENS[ge_token]
v = get_token_balance(user_address, contract_address)
if v != '':
balance_wei += int(v)
user = ge_address_to_user[user_address]
print(f'transfering {balance_wei} wei to {user}')
if balance_wei != 0:
migration_transfer = CreditTransfer(
amount=balance_wei / 1e16,
token=token,
sender_transfer_account=org.
queried_org_level_transfer_account,
recipient_user=user,
transfer_type=TransferTypeEnum.PAYMENT,
transfer_subtype=TransferSubTypeEnum.DISBURSEMENT)
db.session.add(migration_transfer)
migration_transfer.resolve_as_completed()
except Exception as e:
print(e)
sentry_sdk.capture_exception(e)
pass
def post(self):
# Handle Parameters
post_data = request.get_json()
recipient_blockchain_address = post_data.get(
'recipient_blockchain_address', None)
transfer_amount = post_data.get('transfer_amount', None)
master_wallet = g.active_organisation.org_level_transfer_account
receive_transfer_account = create_transfer_account_if_required(
recipient_blockchain_address, g.active_organisation.token,
TransferAccountType.EXTERNAL)
error_message = None
if not recipient_blockchain_address:
error_message = '"recipient_blockchain_address" parameter required'
if not transfer_amount:
error_message = '"transfer_amount" parameter required'
if not error_message and not isinstance(transfer_amount, int):
try:
transfer_amount = int(transfer_amount)
except:
error_message = '"transfer_amount must be an integer'
if not master_wallet:
error_message = f'Organisation {g.active_organisation.id} has no master wallet'
if error_message:
return {'message': error_message}, 400
transfer = CreditTransfer(
transfer_amount,
g.active_organisation.token,
sender_transfer_account=master_wallet,
recipient_transfer_account=receive_transfer_account,
transfer_type=TransferTypeEnum.
PAYMENT, # PAYMENT, since WITHDRAWAL is to the float account by definition
require_sufficient_balance=True)
# Make the transfer!
transfer.resolve_as_complete_and_trigger_blockchain()
credit_transfer = credit_transfer_schema.dump(transfer)
response_object = {
'message': 'Transfer Successful',
'data': {
'credit_transfer': credit_transfer,
}
}
return response_object, 201
def make_withdrawal_transfer(transfer_amount,
token,
send_account,
transfer_mode=None,
require_sender_approved=True,
require_sufficient_balance=True,
automatically_resolve_complete=True,
uuid=None):
"""
This is used for a user withdrawing funds from their Sempo wallet. Only interacts with Sempo float.
:param transfer_amount:
:param token:
:param send_account:
:param transfer_mode:
:param require_sender_approved:
:param require_sufficient_balance:
:param automatically_resolve_complete:
:param uuid:
:return:
"""
transfer = CreditTransfer(transfer_amount,
token,
sender_user=send_account,
uuid=uuid,
transfer_type=TransferTypeEnum.WITHDRAWAL,
transfer_mode=transfer_mode)
if require_sender_approved and not transfer.check_sender_is_approved():
message = "Sender {} is not approved".format(send_account)
transfer.resolve_as_rejected(message)
raise AccountNotApprovedError(message, is_sender=True)
if require_sufficient_balance and not transfer.check_sender_has_sufficient_balance(
):
message = "Sender {} has insufficient balance".format(send_account)
transfer.resolve_as_rejected(message)
raise InsufficientBalanceError(message)
if automatically_resolve_complete:
transfer.resolve_as_completed()
pusher.push_admin_credit_transfer(transfer)
return transfer
def create_transfer(amount, sender_user, recipient_user, token, subtype=None):
transfer = CreditTransfer(
amount=amount,
sender_user=sender_user,
recipient_user=recipient_user,
token=token,
uuid=str(uuid4()))
db.session.add(transfer)
# Mimics before_request hook
g.pending_transactions = []
transfer.resolve_as_completed()
# Mimics after_request hook
for transaction, queue in g.pending_transactions:
transaction.send_blockchain_payload_to_worker(queue=queue)
transfer.transfer_type = TransferTypeEnum.PAYMENT
transfer.transfer_subtype = subtype
# Commit to prevent memory errors with large numbers of txns counts
db.session.commit()
return transfer
def new_credit_transfer(create_transfer_account_user, external_reserve_token):
from server.models.credit_transfer import CreditTransfer
from uuid import uuid4
credit_transfer = CreditTransfer(
amount=1000,
token=external_reserve_token,
sender_user=create_transfer_account_user,
recipient_user=create_transfer_account_user,
transfer_type=TransferTypeEnum.PAYMENT,
transfer_subtype=TransferSubTypeEnum.STANDARD,
uuid=str(uuid4()))
return credit_transfer
def other_new_credit_transfer(create_transfer_account_user, external_reserve_token):
# Janky copy paste job because of how pytest works
from server.models.credit_transfer import CreditTransfer
from uuid import uuid4
credit_transfer = CreditTransfer(
amount=1000,
token=external_reserve_token,
sender_user=create_transfer_account_user,
recipient_user=create_transfer_account_user,
transfer_type=TransferTypeEnum.PAYMENT,
transfer_subtype=TransferSubTypeEnum.STANDARD,
uuid=str(uuid4())
)
return credit_transfer
def create_transfer(amount,
sender_user,
recipient_user,
token,
subtype=TransferSubTypeEnum.STANDARD,
transfer_usages=None,
created_offset=0,
transfer_mode=None):
transfer = CreditTransfer(amount=amount,
sender_user=sender_user,
recipient_user=recipient_user,
token=token,
uuid=str(uuid4()))
db.session.add(transfer)
# Mimics before_request hook
g.pending_transactions = []
if transfer_usages:
transfer.transfer_usages = transfer_usages
transfer.resolve_as_complete_and_trigger_blockchain()
transfer.transfer_type = TransferTypeEnum.PAYMENT
transfer.transfer_subtype = subtype
transfer.transfer_mode = transfer_mode
transfer.created = datetime.utcnow() - timedelta(days=created_offset)
# Commit to prevent memory errors with large numbers of txns counts
db.session.commit()
# Mimic after request hook midway through process
for transaction, queue in g.pending_transactions:
transaction.send_blockchain_payload_to_worker(queue=queue)
return transfer
def create_transfer(amount, sender_user, recipient_user, token, subtype=None):
transfer = CreditTransfer(
amount=amount,
sender_user=sender_user,
recipient_user=recipient_user,
token=token,
uuid=str(uuid4()))
db.session.add(transfer)
transfer.resolve_as_completed()
transfer.transfer_type = TransferTypeEnum.PAYMENT
transfer.transfer_subtype = subtype
return transfer
def create_transfer(amount, sender_user, recipient_user, token, subtype=None):
transfer = CreditTransfer(
amount=amount,
sender_user=sender_user,
recipient_user=recipient_user,
token=token,
uuid=str(uuid4()))
db.session.add(transfer)
transfer.resolve_as_completed()
transfer.transfer_type = TransferTypeEnum.PAYMENT
transfer.transfer_subtype = subtype
# Commit to prevent memory errors with large numbers of txns counts
db.session.commit()
return transfer
def make_payment_transfer(
transfer_amount,
token=None,
send_user=None,
send_transfer_account=None,
receive_user=None,
receive_transfer_account=None,
transfer_use=None,
transfer_mode=None,
require_sender_approved=True,
require_recipient_approved=True,
require_sufficient_balance=True,
automatically_resolve_complete=True,
uuid=None,
transfer_subtype: TransferSubTypeEnum = TransferSubTypeEnum.STANDARD,
is_ghost_transfer=False,
queue='high-priority'):
"""
This is used for internal transfers between Sempo wallets.
:param transfer_amount:
:param token:
:param send_user:
:param send_transfer_account:
:param receive_user:
:param receive_transfer_account:
:param transfer_use:
:param transfer_mode: TransferModeEnum
:param require_sender_approved:
:param require_recipient_approved:
:param require_sufficient_balance:
:param automatically_resolve_complete:
:param uuid:
:param transfer_subtype: accepts TransferSubType str.
:param is_ghost_transfer: if an account is created for recipient just to exchange, it's not real
:param enable_pusher:
:param queue:
:return:
"""
if transfer_subtype is TransferSubTypeEnum.DISBURSEMENT:
require_sender_approved = False
require_recipient_approved = False
require_sufficient_balance = False
# primary NGO wallet to disburse from
send_transfer_account = receive_user.default_organisation.queried_org_level_transfer_account
if transfer_subtype is TransferSubTypeEnum.RECLAMATION:
require_sender_approved = False
# primary NGO wallet to reclaim to
receive_transfer_account = send_user.default_organisation.queried_org_level_transfer_account
if transfer_subtype is TransferSubTypeEnum.INCENTIVE:
send_transfer_account = receive_transfer_account.get_float_transfer_account(
)
transfer = CreditTransfer(
transfer_amount,
token=token,
sender_user=send_user,
sender_transfer_account=send_transfer_account,
recipient_user=receive_user,
recipient_transfer_account=receive_transfer_account,
uuid=uuid,
transfer_type=TransferTypeEnum.PAYMENT,
transfer_subtype=transfer_subtype,
transfer_mode=transfer_mode,
is_ghost_transfer=is_ghost_transfer)
make_cashout_incentive_transaction = False
if transfer_use is not None:
usages = []
try:
use_ids = transfer_use.split(',') # passed as '3,4' etc.
except AttributeError:
use_ids = transfer_use
for use_id in use_ids:
if use_id != 'null':
use = TransferUsage.query.get(int(use_id))
if use:
usages.append(use.name)
if use.is_cashout:
make_cashout_incentive_transaction = True
else:
usages.append('Other')
transfer.transfer_use = usages
transfer.uuid = uuid
if require_sender_approved and not transfer.check_sender_is_approved():
message = "Sender {} is not approved".format(send_transfer_account)
transfer.resolve_as_rejected(message)
raise AccountNotApprovedError(message, is_sender=True)
if require_recipient_approved and not transfer.check_recipient_is_approved(
):
message = "Recipient {} is not approved".format(receive_user)
transfer.resolve_as_rejected(message)
raise AccountNotApprovedError(message, is_sender=False)
if require_sufficient_balance and not transfer.check_sender_has_sufficient_balance(
):
message = "Sender {} has insufficient balance".format(
send_transfer_account)
transfer.resolve_as_rejected(message)
raise InsufficientBalanceError(message)
if automatically_resolve_complete:
transfer.resolve_as_completed(queue=queue)
if make_cashout_incentive_transaction:
try:
# todo: check limits apply
incentive_amount = round(
transfer_amount *
current_app.config['CASHOUT_INCENTIVE_PERCENT'] / 100)
make_payment_transfer(
incentive_amount,
receive_user=receive_user,
transfer_subtype=TransferSubTypeEnum.INCENTIVE,
transfer_mode=TransferModeEnum.INTERNAL)
except Exception as e:
print(e)
sentry_sdk.capture_exception(e)
return transfer
def post(self):
post_data = request.get_json()
transfer_amount = post_data.get('transfer_amount')
sender_blockchain_address = post_data.get('sender_blockchain_address')
recipient_blockchain_address = post_data.get(
'recipient_blockchain_address')
blockchain_transaction_hash = post_data.get(
'blockchain_transaction_hash')
contract_address = post_data.get('contract_address')
transfer = CreditTransfer.query.execution_options(
show_all=True).filter_by(
blockchain_hash=blockchain_transaction_hash).first()
# Case 1: Transfer exists in the database already. Mark received_third_party_sync as true, fetch it, and return it in that case
if transfer:
transfer.received_third_party_sync = True
credit_transfer = credit_transfer_schema.dump(transfer).data
response_object = {
'message': 'Transfer Successful',
'data': {
'credit_transfer': credit_transfer,
}
}
else:
token = Token.query.filter_by(address=contract_address).first()
maybe_sender_transfer_account = TransferAccount.query.execution_options(
show_all=True).filter_by(
blockchain_address=sender_blockchain_address).first()
maybe_sender_user = maybe_sender_transfer_account.users[
0] if maybe_sender_transfer_account and len(
maybe_sender_transfer_account.users) == 1 else None
maybe_recipient_transfer_account = TransferAccount.query.execution_options(
show_all=True).filter_by(
blockchain_address=recipient_blockchain_address).first()
maybe_recipient_user = maybe_recipient_transfer_account.users[
0] if maybe_recipient_transfer_account and len(
maybe_recipient_transfer_account.users) == 1 else None
# Case 2: Two non-sempo users making a trade on our token. We don't have to track this!
if not maybe_recipient_transfer_account and not maybe_sender_transfer_account:
response_object = {
'message': 'No existing users involved in this transfer',
'data': {}
}
# Case 3: Two non-Sempo users, at least one of whom has interacted with Sempo users before transacting with one another
# We don't have to track this either!
elif (
# The recipient is either an external transfer account we've seen before
# OR we haven't seen them before and so can infer they're external
((maybe_recipient_transfer_account
and maybe_recipient_transfer_account.account_type
== TransferAccountType.EXTERNAL)
or not maybe_recipient_transfer_account) and
#
# And the sender is either an external transfer account we've seen before
# OR we haven't seen them before and so can infer they're external
((maybe_sender_transfer_account
and maybe_sender_transfer_account.account_type
== TransferAccountType.EXTERNAL)
or not maybe_sender_transfer_account)):
response_object = {
'message': 'Only external users involved in this transfer',
'data': {}
}
# Case 4: One or both of the transfer accounts are affiliated with Sempo accounts.
# This is the only case where we want to generate a new CreditTransfer object.
else:
send_transfer_account = create_transfer_account_if_required(
sender_blockchain_address, token,
TransferAccountType.EXTERNAL)
receive_transfer_account = create_transfer_account_if_required(
recipient_blockchain_address, token,
TransferAccountType.EXTERNAL)
transfer = CreditTransfer(
transfer_amount,
token=token,
sender_transfer_account=send_transfer_account,
recipient_transfer_account=receive_transfer_account,
transfer_type=TransferTypeEnum.PAYMENT,
sender_user=maybe_sender_user,
recipient_user=maybe_recipient_user,
require_sufficient_balance=False,
received_third_party_sync=True)
transfer.resolve_as_complete_with_existing_blockchain_transaction(
blockchain_transaction_hash)
db.session.flush()
credit_transfer = credit_transfer_schema.dump(transfer).data
response_object = {
'message': 'Transfer Successful',
'data': {
'credit_transfer': credit_transfer,
}
}
return make_response(jsonify(response_object)), 201
