export type WebhookVerification = {
    readonly valid: true;
} | {
    readonly valid: false;
    readonly reason: "missing_signature" | "missing_timestamp" | "invalid_timestamp" | "expired" | "mismatch";
};
export interface WebhookVerifyArgs {
    readonly body: string;
    readonly signatureHeader: string | undefined;
    readonly timestampHeader: string | undefined;
    readonly secret: string;
    /** Override the current time (epoch seconds). Defaults to Date.now()/1000. */
    readonly now?: number;
    /** Replay window in seconds. Defaults to 300. */
    readonly maxAgeSeconds?: number;
}
export declare function verifyWebhook(args: WebhookVerifyArgs): WebhookVerification;
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