import { arrayify } from './.bytes';
/**
 * https://docs.soliditylang.org/en/v0.5.8/metadata.html#encoding-of-the-metadata-hash-in-the-bytecode
 *
 * https://docs.soliditylang.org/en/v0.5.9/metadata.html#encoding-of-the-metadata-hash-in-the-bytecode
 * https://blog.soliditylang.org/2019/05/28/solidity-0.5.9-release-announcement/
 *
 * v0.6.2 ends with `0x00 0x33` but v0.6.1 ends with `0x00 0x32`
 * https://blog.soliditylang.org/2019/12/17/solidity-0.6.0-release-announcement/
 * https://docs.soliditylang.org/en/v0.6.2/metadata.html#encoding-of-the-metadata-hash-in-the-bytecode
 */
/**
 * Represents the metadata hash protocols embedded in bytecode by `solc`.
 */
export declare class Metadata {
    [key: string]: string | Uint8Array | undefined | boolean | number;
    protocol: 'bzzr0' | 'bzzr1' | 'ipfs' | '';
    hash: string;
    solc: string;
    experimental?: boolean;
    get url(): string;
    get minor(): number | undefined;
}
/**
 * Splits the `bytecode` into executable code and embedded metadata hash as
 * placed by the Solidity compiler, if present in the `bytecode`.
 *
 * If `metadata` contains an IPFS hash, it is encoded using base 58.[^1]
 *
 * @param bytecode the contract or library `bytecode` to test for metadata hash.
 * @returns An object where the `bytecode` is the executable code and
 * `metadata` is the metadata hash when the metadata is present.
 *
 * [^1]: https://github.com/pur3miish/base58-js
 */
export declare function splitMetadataHash(buffer: Parameters<typeof arrayify>[0]): {
    /**
     * The executable code without metadata when it is present.
     * Otherwise, the original `bytecode`.
     */
    bytecode: Uint8Array;
    /**
     * The metadata if present. Otherwise `undefined`.
     */
    metadata: Metadata | undefined;
};