export type BillingClass = "subscription" | "metered";
export type BillingFailoverAction = {
    action: "failover";
    to: {
        provider: string;
        modelId: string;
    };
    notice: string;
} | {
    action: "halt_ask";
    notice: string;
};
export interface BillingFailoverInput {
    failedModel: {
        provider: string;
        id: string;
    };
    billingClass: BillingClass;
    providerDefaultModelId: string | undefined;
    hopResolvesWithAuth: boolean;
    hopExhausted: boolean;
    subscriptionHop?: boolean;
}
export declare function decideBillingFailover(input: BillingFailoverInput): BillingFailoverAction;
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