def do_transfer_from(self, project_id, t_from, t_to, amount):
storage = StorageManager()
if amount <= 0:
return False
available_key = concat(t_from, t_to)
available_to_to_addr = storage.get_double(project_id, available_key)
if available_to_to_addr < amount:
print("Insufficient funds approved")
return False
from_balance = storage.get_double(project_id, t_from)
if from_balance < amount:
print("Insufficient tokens in from balance")
return False
to_balance = storage.get_double(project_id, t_to)
new_from_balance = from_balance - amount
new_to_balance = to_balance + amount
storage.put_double(project_id, t_to, new_to_balance)
storage.put_double(project_id, t_from, new_from_balance)
print("transfer complete")
new_allowance = available_to_to_addr - amount
if new_allowance == 0:
print("removing all balance")
storage.delete_double(project_id, available_key)
else:
print("updating allowance to new allowance")
storage.put_double(project_id, available_key, new_allowance)
OnTransfer(project_id, t_from, t_to, amount)
return True
def do_transfer(self, project_id, t_from, t_to, amount):
storage = StorageManager()
# Pointless
if amount <= 0:
return False
# Validate address
if CheckWitness(t_from):
# Pointless
if t_from == t_to:
print("transfer to self!")
return True
from_val = storage.get_double(project_id, t_from)
if from_val < amount:
print("insufficient funds")
return False
if from_val == amount:
storage.delete_double(project_id, t_from)
else:
difference = from_val - amount
storage.put_double(project_id, t_from, difference)
to_value = storage.get_double(project_id, t_to)
to_total = to_value + amount
storage.put_double(project_id, t_to, to_total)
OnTransfer(project_id, t_from, t_to, amount)
return True
else:
print("from address is not the tx sender")
return False