export type OutboundCallTerminalPoll = {
    status: 'completed' | 'failed';
    durationSeconds?: number;
    outcome?: Record<string, unknown>;
    transcript: Array<{
        role: string;
        text: string;
        at?: string;
    }>;
    failureReason?: string;
    failureCode?: string;
    billedCostUsd?: number;
};
export declare function getOutboundCallStatus(params: {
    callId: string;
    analyticsKey: string;
    proxyUrl?: string;
}): Promise<OutboundCallTerminalPoll | null>;
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