/**
 * Blockchain queries for IoTeX SDK
 */
import { GrpcClient } from '../client/grpc-client';
import { ChainMeta, Block, EpochMeta, VoteBucket } from '../types';
export declare class Blockchain {
    private client;
    constructor(client: GrpcClient);
    /**
     * Get blockchain metadata
     */
    getChainMeta(): Promise<ChainMeta>;
    /**
     * Get block by height or hash
     */
    getBlock(heightOrHash: number | string): Promise<Block>;
    /**
     * Get epoch metadata
     */
    getEpochMeta(epochNumber?: number): Promise<EpochMeta>;
    /**
     * Get voting buckets (paginated)
     */
    getBucketList(params?: {
        voterAddress?: string;
        candidateName?: string;
        offset?: number;
        limit?: number;
    }): Promise<VoteBucket[]>;
    /**
     * Get bucket by index
     */
    getBucket(bucketIndex: number): Promise<VoteBucket>;
    /**
     * Get blockchain version
     */
    getVersion(): Promise<{
        packageVersion: string;
        packageCommitID: string;
        gitStatus: string;
        goVersion: string;
        buildTime: string;
    }>;
    /**
     * Get actions by various filters
     */
    getActions(params: {
        byHash?: string;
        byAddr?: {
            address: string;
            start: number;
            count: number;
        };
        byBlk?: {
            blkHash: string;
            start: number;
            count: number;
        };
        byIndex?: {
            start: number;
            count: number;
        };
    }): Promise<any[]>;
    /**
     * Get receipt by action hash
     */
    getReceipt(actionHash: string): Promise<any>;
    /**
     * Read contract state
     */
    readContract(params: {
        execution: {
            amount: string;
            contract: string;
            data: string;
        };
        callerAddress: string;
        gasLimit?: string;
        gasPrice?: string;
    }): Promise<any>;
}
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