interface RpcRequest {
    method: string;
    params: unknown[];
    id: number;
}
interface SignedRequest {
    jsonrpc: string;
    method: string;
    id: number;
    params: {
        __signed: {
            account: string;
            nonce: string;
            params: string;
            signatures: string[];
            timestamp: string;
        };
    };
}
export declare const K: Buffer;
/**
 * Sign a JSON RPC Request.
 */
export declare function sign(request: RpcRequest, account: string, keys: string[]): SignedRequest;
/**
 * Validate a signed JSON RPC request.
 * Throws a ValidationError if the request fails validation.
 *
 * @param request The signed JSON RPC request to validate
 * @param verify Function to verify signatures against public keys
 * @returns Resolved request params
 */
export declare function validate(request: SignedRequest, verify: (message: Buffer, signatures: string[], account: string) => Promise<void>): Promise<unknown>;
declare const _default: {
    sign: typeof sign;
    validate: typeof validate;
    readonly K: Buffer<ArrayBufferLike>;
};
export default _default;