/**
 * Encode a bigint as 8 bytes, little-endian (u64).
 * This is the wire format used in the AliasAccounts proof message.
 */
declare const u64LeBytes: (v: bigint) => Uint8Array;
/**
 * Build the 32-byte blake2_256 message that the ring-VRF proof must be built
 * against, as required by AliasAccounts after individuality#955.
 *
 * Wire layout of the pre-image (54 bytes):
 *   ALIAS_PROOF_TAG    — 14 raw bytes ("alias-accounts", no length prefix)
 *   accountPub         — 32 raw bytes (AccountId32 / SS58 public key)
 *   u64LE(proofValidAt) — 8 little-endian bytes
 *
 * Throws if accountPub is not exactly 32 bytes (wrong key or truncation would
 * silently misalign the u64 at the end, producing an undetectable BadProof).
 */
declare const buildAliasProofMessage: (accountPub: Uint8Array, proofValidAt: bigint) => Uint8Array;
type TimestampNowQuery = {
    query: {
        Timestamp: {
            Now: {
                getValue: (opts?: {
                    at: string;
                }) => Promise<bigint>;
            };
        };
    };
};
/**
 * Read the current chain timestamp from Asset Hub and return it in seconds
 * (as a bigint) suitable for passing as `proof_valid_at`.
 *
 * `Timestamp.Now` returns milliseconds; dividing by 1000n converts to seconds.
 *
 * Do NOT cache this value across retries — the ProofValidityWindow is 300s.
 * Re-call on every tx attempt so the timestamp stays within the window.
 */
declare const getProofValidAtSec: (ahApi: TimestampNowQuery) => Promise<bigint>;

export { buildAliasProofMessage, getProofValidAtSec, u64LeBytes };