IsEmpty (service/invoiceupdate.go)

Provides invoice line diffing and validation logic for billing updates.

// 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 billingservice

import (
	"context"
	"errors"
	"fmt"

	"github.com/oklog/ulid/v2"
	"github.com/samber/lo"
	"github.com/samber/mo"

	"github.com/openmeterio/openmeter/openmeter/billing"
	"github.com/openmeterio/openmeter/openmeter/productcatalog"
	"github.com/openmeterio/openmeter/openmeter/taxcode"
	"github.com/openmeterio/openmeter/pkg/clock"
	"github.com/openmeterio/openmeter/pkg/currencyx"
	"github.com/openmeterio/openmeter/pkg/entitydiff"
	"github.com/openmeterio/openmeter/pkg/equal"
	"github.com/openmeterio/openmeter/pkg/models"
	"github.com/openmeterio/openmeter/pkg/sl

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