/**
 * Verifies a Merkle Proof.
 * @param rootHash the rootHash of the Trie
 * @param path the path to proof
 * @param proof the serialized nodes
 * @param expectedValue expected value, if null, this function verifies for non existing node.
 * @param errorMsg the error message that should be used in case of not verifiable.
 *
 * The function will return the value of the last node if it was successfull or throw otherwise.
 */
export default function verify(rootHash: Buffer, path: Buffer, proof: Buffer[], expectedValue: Buffer, errorMsg?: string): Promise<Buffer>;
export declare function stringToNibbles(bkey: Buffer): number[];