/**
 * CallLog — JSONL persistent record of every outbound voice call the agent
 * initiates through VoiceCall (and updates as VoiceStatus polls for status).
 *
 * Why a journal: BlockRun's gateway doesn't expose a "list my calls" endpoint —
 * /v1/voice/call/{id} works but you need to remember the id. Without local
 * persistence, the panel can't show a "recent calls" view and cross-session
 * memory ("did I already leave a voicemail at this number this week?") is
 * impossible.
 *
 * Why append-only with multiple rows per call_id: calls are async, status
 * mutates over time (queued → in_progress → completed). Append-only avoids
 * the JSONL-rewrite-race that an in-place update would introduce — readers
 * pick the latest row by call_id when summarizing. Same approach trade-log
 * uses for fills vs corrections.
 *
 * Schema (additive over time; readers tolerate missing optional fields):
 *   timestamp:    ms epoch of THIS log row (not the call start)
 *   call_id:      Bland.ai call identifier (stable across rows)
 *   to / from:    E.164 numbers
 *   task:         the natural-language instructions the AI followed
 *   voice / max_duration_min / language:  caller-side preferences (queue row only)
 *   status:       queued | in_progress | completed | failed | cancelled |
 *                 busy | no-answer | voicemail
 *   duration_sec: actual call length once known
 *   transcript:   full conversation text once completed
 *   recording_url: Bland-hosted MP3/WAV link
 *   paid_usd:     0.54 charged on the initial POST; later rows carry 0
 *   tx_hash:      x402 settlement hash for the initial POST
 */
export type CallStatus = 'queued' | 'in_progress' | 'completed' | 'failed' | 'cancelled' | 'busy' | 'no-answer' | 'voicemail';
export interface CallLogEntry {
    timestamp: number;
    call_id: string;
    to: string;
    from: string;
    task: string;
    voice?: string;
    max_duration_min?: number;
    language?: string;
    status: CallStatus;
    duration_sec?: number;
    transcript?: string;
    recording_url?: string;
    paid_usd: number;
    tx_hash?: string;
}
export declare function isTerminalStatus(s: unknown): s is CallStatus;
export declare function defaultCallLogPath(): string;
export declare class CallLog {
    private filePath;
    constructor(filePath?: string);
    append(entry: CallLogEntry): void;
    /** Read every entry on disk in chronological (append) order. */
    all(): CallLogEntry[];
    /**
     * Latest row for each call_id, newest first by initial-row timestamp.
     * This is the canonical "list of calls" view for the panel.
     */
    summary(limit?: number): CallLogEntry[];
    byCallId(callId: string): CallLogEntry | null;
}