16 lines
478 B
C#
16 lines
478 B
C#
namespace FinancialApi.Application;
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public record Account(int Id, decimal Balance)
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{
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public Account ApplyFee(decimal amount)
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{
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if (amount <= 0)
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throw new ArgumentException("Fee must be positive.");
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if (Balance - amount < 0)
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throw new InvalidOperationException("Insufficient funds.");
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// Returns a brand new record with the updated balance
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return this with { Balance = Balance - amount };
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}
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} |