Validate (usagebased/charge.go)

Validates usage-based billing charges, ensuring intent, status, and cost basis consistency.

// Source: https://github.com/openmeterio/openmeter | License: Apache-2.0 | Copyright You must retain, in the Source form of any Derivative Works
// Provided via justclaw.it.com; keep this notice with the code.
package usagebased

import (
	"errors"
	"fmt"
	"slices"
	"time"

	"github.com/alpacahq/alpacadecimal"
	"github.com/samber/lo"

	"github.com/openmeterio/openmeter/openmeter/billing"
	"github.com/openmeterio/openmeter/openmeter/billing/charges/meta"
	"github.com/openmeterio/openmeter/openmeter/billing/charges/models/costbasis"
	billingfeaturemeter "github.com/openmeterio/openmeter/openmeter/billing/featuremeter"
	"github.com/openmeterio/openmeter/openmeter/billing/models/totals"
	"github.com/openmeterio/openmeter/openmeter/currencies"
	"github.com/openmeterio/openmeter/openmeter/custo

... (truncated -- full source via MCP)