import { UserSession, ProductAccountRef, ProductSubtreeOptions } from '@parity/product-sdk-terminal';
export { INCOMPLETE_SESSION_MESSAGE, ProductAccountRef, sessionRootPublicKey } from '@parity/product-sdk-terminal';
import { PolkadotSigner } from 'polkadot-api';

/**
 * Session-backed `PolkadotSigner` for a product account, built on
 * product-sdk-terminal's `createSessionSignerForAccount`.
 *
 * RFC-0022 puts the product account at `//product//{productId}/{index}`. The
 * first two junctions are hard, so the key cannot be derived from the session's
 * root public key: the SDK asks the phone for the `//product//{productId}`
 * subtree key once and caches it in `{appId}_ProductSubtrees.json`.
 */

declare const SESSION_EXPIRED_MESSAGE: string;
/** A healthy phone answers in 3-30s; host-papp's own deadline is 240s. */
declare const SUBTREE_TIMEOUT_MS = 60000;
/**
 * The product account public key for `ref`. Reaches the phone only when the
 * subtree key is not cached yet, which is normally once, right after pairing.
 */
declare function deriveProductPublicKey(session: UserSession, ref: ProductAccountRef, options?: ProductSubtreeOptions): Promise<Uint8Array>;
declare function createSessionSigner(session: UserSession, ref: ProductAccountRef, options?: ProductSubtreeOptions): Promise<PolkadotSigner>;

export { SESSION_EXPIRED_MESSAGE, SUBTREE_TIMEOUT_MS, createSessionSigner, deriveProductPublicKey };