import { type ContentSecurityPolicy } from '@appsemble/node-utils';
import { type Context } from 'koa';
/**
 * Render settings as an HTML script tag.
 *
 * @param settings The settings to render. This must be a JSON serializable object.
 * @param nonce The settings nonce.
 * @param statements Custom JavaScript statements to append.
 * @returns A tuple of the digest and the HTML script tag. The digest should be added to the CSP
 *   `script-src`.
 */
export declare function createSettings(settings: unknown, nonce?: string, statements?: string[]): [digest: string, script: string];
export declare function render(ctx: Context, filename: string, data: Record<string, unknown>): Promise<void>;
/**
 * Convert a CSP key / values pair object into a real content security policy string.
 *
 * Any falsy values will be excluded.
 *
 * @param csp The CSP object to convert
 * @returns The CSP object as a string
 */
export declare function makeCSP(csp: ContentSecurityPolicy): string;