/**
 * 0x prefix a string if not prefixed already
 */
export declare function ensure0xPrefix(hex: string): string;
export declare function isValidatePubkeyHex(pubkeyHex: string): boolean;
export declare function getPubkeyHexFromKeystore(keystore: {
    pubkey?: string;
}): string;
/**
 * Parse string inclusive range: `0..32`, into an array of all values in that range
 */
export declare function parseRange(range: string): number[];
export declare function assertValidPubkeysHex(pubkeysHex: string[]): void;
/**
 * Parses a file to get a list of bootnodes for a network.
 * Bootnodes file is expected to contain bootnode ENR's concatenated by newlines, or commas for
 * parsing plaintext, YAML, JSON and/or env files.
 */
export declare function parseBootnodesFile(bootnodesFile: string): string[];
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