export declare const PENDING_TTL_MS: number;
export type PendingReason = "approval" | "untrusted-read";
export type PendingAction = {
    kind: "send";
} | {
    kind: "reply";
    messageId: string;
    replyAll?: boolean;
} | {
    kind: "forward";
    messageId: string;
} | {
    kind: "sendDraft";
    draftId: string;
    fingerprint: string;
};
export interface PendingAttachment {
    path: string;
    name: string;
    size: number;
}
export interface PendingSend {
    id: string;
    createdAt: string;
    account: string;
    tool: string;
    reason: PendingReason;
    /** Why the lock fired, when reason is "untrusted-read". */
    taintedBy?: string;
    action: PendingAction;
    from?: string;
    to: string[];
    cc: string[];
    bcc: string[];
    subject: string;
    body: string;
    html?: boolean;
    attachments: PendingAttachment[];
}
export declare function pendingDir(): string;
export declare function queueSend(spec: Omit<PendingSend, "id" | "createdAt">): PendingSend;
export declare function readPendingWithDigest(id: string): {
    spec: PendingSend;
    digest: string;
} | undefined;
export declare function readPending(id: string): PendingSend | undefined;
export declare function listPending(): PendingSend[];
export declare function removePending(id: string): boolean;
export declare function isExpired(spec: PendingSend, now?: number): boolean;
export declare function allRecipients(spec: PendingSend): string[];