import { type Web3SignedSignFn } from "../auth/web3-signed-builder.js";
/**
 * Compute the legacy bodyHash shape currently accepted by Session Relay.
 *
 * @remarks
 * Personal Server Web3Signed requests use `sha256:<hex>`, including a canonical
 * empty-body hash. Session Relay's current signed init endpoint verifies a
 * legacy body hash: bare SHA-256 hex for non-empty JSON bodies and `""` for
 * empty bodies. Keep this compatibility local to the Relay integration.
 */
export declare function computeSessionRelayBodyHash(body: string | undefined): string;
/** Build a Web3Signed header compatible with Session Relay's signed endpoints. */
export declare function buildSessionRelayWeb3SignedHeader(params: {
    signMessage: Web3SignedSignFn;
    aud: string;
    method: string;
    uri: string;
    body?: string;
    iat?: number;
    exp?: number;
}): Promise<string>;