Code/V2/Application/CurrencyService.cs
A static service for adjusting a character's currency balance. It provides Credit and Debit methods that return OperationResult<CharacterRecord>, validating inputs and preventing negative amounts and overflow.
#nullable enable
using System;
using Hexagon.V2.Domain;
using Hexagon.V2.Kernel;
namespace Hexagon.V2.Application;
public static class CurrencyService
{
public static OperationResult<CharacterRecord> Credit( CharacterRecord character, long amount )
{
if ( amount < 0 ) return OperationResult<CharacterRecord>.Failure( ErrorCode.InvalidArgument, "Credit amount cannot be negative." );
try
{
return OperationResult<CharacterRecord>.Success( character.WithBalance( checked(character.Balance + amount) ) );
}
catch ( OverflowException )
{
return OperationResult<CharacterRecord>.Failure( ErrorCode.Conflict, "Balance would overflow." );
}
}
public static OperationResult<CharacterRecord> Debit( CharacterRecord character, long amount )
{
if ( amount < 0 ) return OperationResult<CharacterRecord>.Failure( ErrorCode.InvalidArgument, "Debit amount cannot be negative." );
if ( character.Balance < amount ) return OperationResult<CharacterRecord>.Failure( ErrorCode.Conflict, "Insufficient balance." );
return OperationResult<CharacterRecord>.Success( character.WithBalance( character.Balance - amount ) );
}
}