fix(wallet): Fix wallet ongoing refresh with draft invoice #4677
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Context
When a wallet has limitations (restricted to specific billable metrics or fee types), the ongoing balance calculation was incorrectly summing all draft invoice amounts instead of only the fees that match the wallet's limitations. This caused the ongoing balance to be understated, as it included fees that should not be applicable to the wallet.
Description
The wallet ongoing balance is calculated as:
balance - current_usage - draft_invoices_amount + already_billed_amount. Previously,draft_invoices_amountwas calculated usingcustomer.invoices.draft.sum(:total_amount_cents), which ignored wallet limitations entirely.This PR introduces
Wallets::Balance::CalculateApplicableFeesServicethat filters fees by billable metric limitations and fee type limitations when applicable.The service is now used by:
RefreshOngoingService- for real-time balance refreshRefreshOngoingUsageService- for clock job balance refreshAppliedPrepaidCreditsService- for applying prepaid credits to invoices