Misc Dependencies
Contents
Misc Dependencies¶
Token¶
The following object represents token values in the system. Supported operations include add, subtract, and set which are anologous to credit, debit, and overwrite in traditional book-keeping parlance.
class Token(object):
"""
Represents a token balance with common math operations to increase, decrease, and set the balance.
"""
def __init__(
self, balance: Decimal = Decimal('0'), qdecimals: Decimal = DEFAULT_QDECIMALS
):
self.balance = balance
self.qdecimals = qdecimals
def add(self, value: Decimal):
self.balance += self.validate(value)
def subtract(self, value: Decimal):
self.balance -= self.validate(value)
def set(self, value: Decimal):
self.balance = self.validate(value)
def validate(self, value) -> Decimal:
self.validate_balance()
return self.validate_value(value)
def validate_balance(self):
if pd.isnull(self.balance):
self.balance = Decimal('0')
def validate_value(self, value) -> Decimal:
if pd.isnull(value):
value = Decimal('0')
return Decimal(str(value)).quantize(self.qdecimals)