Created
February 21, 2022 17:15
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import dataclasses | |
from dataclasses import dataclass | |
from decimal import Decimal | |
@dataclass(frozen=True) | |
class Account: | |
amount: Decimal | |
blocked: Decimal | |
def add_amount(self, amount: Decimal) -> "Account": | |
return Account( | |
amount=self.amount + amount, | |
blocked=self.blocked, | |
) | |
def block_amount(self, amount: Decimal) -> "Account": | |
if amount > self.amount: | |
raise ValueError("Insufficient balance") | |
return Account( | |
amount=self.amount, | |
blocked=self.blocked + amount, | |
) | |
@property | |
def available_amount(self) -> Decimal: | |
return self.amount - self.blocked |
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