/**
 * Generates an ERC4337 nonce from a "key" & "nonce".
 * - If key & nonce undefined => generated random key with nonce 0
 * ERC4337 supports "2D" nonces that can live concurrently within various "keys"
 * Read more https://eips.ethereum.org/EIPS/eip-4337#semi-abstracted-nonce-support
 * @param param0
 */
export declare function getERC4337Nonce(parameters?: {
    key: bigint;
    nonce: bigint;
}): bigint;