package models import ( "time" "github.com/google/uuid" ) type BillingRate struct { ID uuid.UUID `db:"id" json:"id"` TenantID uuid.UUID `db:"tenant_id" json:"tenant_id"` UserID *uuid.UUID `db:"user_id" json:"user_id,omitempty"` Rate float64 `db:"rate" json:"rate"` Currency string `db:"currency" json:"currency"` ValidFrom string `db:"valid_from" json:"valid_from"` ValidTo *string `db:"valid_to" json:"valid_to,omitempty"` CreatedAt time.Time `db:"created_at" json:"created_at"` }