/**
 * Staking operations (stake2) for IoTeX SDK
 *
 * Note: This is a simplified implementation. Full protobuf integration
 * would require proper action builders and serialization.
 */
import { GrpcClient } from '../client/grpc-client';
import { StakeCreateParams, StakeRegisterParams, StakeUpdateCandidateParams, SendActionResult } from '../types';
export declare class Stake2 {
    private client;
    private keystore;
    constructor(client: GrpcClient, keystoreDir?: string);
    /**
     * Create voting bucket
     *
     * Note: This is a placeholder implementation. Full implementation requires:
     * 1. Proper protobuf action building
     * 2. Action serialization
     * 3. Signing with private key
     * 4. Wrapping in envelope with nonce, gas, etc.
     */
    create(params: StakeCreateParams): Promise<SendActionResult>;
    /**
     * Register as candidate
     */
    register(params: StakeRegisterParams): Promise<SendActionResult>;
    /**
     * Add to stake
     */
    add(bucketIndex: number, amount: string, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Renew stake
     */
    renew(bucketIndex: number, duration: number, autoStake: boolean, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Withdraw stake
     */
    withdraw(bucketIndex: number, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Change candidate
     */
    changeCandidate(bucketIndex: number, candidateName: string, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Update candidate info
     */
    updateCandidate(params: StakeUpdateCandidateParams): Promise<SendActionResult>;
    /**
     * Transfer bucket ownership
     */
    transferOwnership(bucketIndex: number, newOwner: string, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Endorse action
     */
    endorse(bucketIndex: number, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Release stake
     */
    release(bucketIndex: number, signer: string, password: string): Promise<SendActionResult>;
    /**
     * Helper: Get nonce for address
     */
    private getNonce;
    /**
     * Helper: Suggest gas price
     */
    private suggestGasPrice;
}
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