import { ChainId } from '../../types';
import { BlockscoutNativeTokenData, BlockscoutToken, BlockscoutTokenPagination, BlockscoutTokens, BlockscoutTokenType } from './blockscoutType';
import { HttpClient } from '../http';
/**
 * Blockscout class provides a client abstraction for the Immutable 3rd party indexer.
 */
export declare class Blockscout {
    readonly url: string;
    readonly nativeToken: BlockscoutNativeTokenData;
    readonly ttl: number;
    readonly chainId: ChainId;
    private cacheMap;
    private httpClient;
    private setCache;
    private getCache;
    /**
     * Blockscout constructor
     * @param httpClient Client used for http requests
     * @param chainId target chain
     * @param ttl cache TTL
     */
    constructor(httpClient: HttpClient, chainId: ChainId, ttl?: number);
    /**
     * isChainSupported verifies if the chain is supported by Blockscout
     * @param chainId
     */
    static isChainSupported: (chainId: ChainId) => boolean;
    /**
     * isBlockscoutError verifies if the error is a Blockscout client error
     * @param err error to evaluate
     */
    static isBlockscoutError: (err: any) => boolean;
    /**
     * getTokensByWalletAddress fetches the list of tokens (by type) owned by the wallet address.
     * @param walletAddress wallet address
     * @param tokenType token type
     * @param nextPage parameters for the next page, to be provided alongside walletAddress and tokenType
     * @returns list of tokens given the wallet address and the token types
     */
    getTokensByWalletAddress(params: {
        walletAddress: string;
        tokenType: BlockscoutTokenType;
        nextPage?: BlockscoutTokenPagination | null;
    }): Promise<BlockscoutTokens>;
    /**
     * getNativeTokenByWalletAddress fetches the native token owned by the wallet address.
     * @param walletAddress wallet address
     * @returns list of tokens given the wallet address and the token types
     */
    getNativeTokenByWalletAddress(params: {
        walletAddress: string;
    }): Promise<BlockscoutToken>;
}