/**
 * Represents an Era in the system.
 * An Era is a distinct period in the blockchain, typically used for consensus, validator rotations, and reward distributions.
 */
export declare class Era {
    /**
     * The numeric identifier of the Era.
     */
    value: number;
    /**
     * Creates a new Era instance.
     * @param value - The numeric identifier of the Era.
     */
    constructor(value: number);
    /**
     * Converts the Era instance to its JSON representation.
     * @returns A string representation of the Era's numeric value.
     */
    toJSON(): string;
    /**
     * Creates an Era instance from its JSON representation.
     * @param json - The JSON string representation of the Era.
     * @returns A new Era instance.
     * @throws Error if the JSON string cannot be parsed as a valid number.
     */
    static fromJSON(json: string): Era;
    /**
     * Creates an Era instance from a byte array.
     * @param bytes - The byte array representing the Era value as a 32-bit unsigned integer.
     * @returns A new Era instance.
     */
    static fromBytes(bytes: Uint8Array): Era;
    /**
     * Converts the Era instance to a byte array.
     * @returns A Uint8Array representation of the Era value as a 32-bit unsigned integer.
     */
    toBytes(): Uint8Array;
}