import { ApiPromise } from '@polkadot/api';
import { WalletName } from '@solana/wallet-adapter-base';
import { Wallet } from '@solana/wallet-adapter-react';
import { ethers } from 'ethers';
import { Chain, Chains, PolkadotExtensionState, ProviderConfigs, SolanaWalletAdapterState } from '../core/interfaces';
export declare const userCanceledError: Error;
/**
 * @param account
 * @param prefix
 * @param suffix
 * @returns
 */
export declare function truncateString(str: string, headNumber?: number, tailNumber?: number, replacement?: string): string;
/**
 * @param u8a
 * @returns
 */
export declare const u8aToHex: (u8a: number[]) => `0x${string}`;
/**
 * @param u8
 * @returns
 */
export declare const u8ToHex: (u8: number) => `0x${string}`;
interface ConnectedWalletCache {
    providerLabel: string;
    chainId: string;
}
export declare function setConnectedWalletCache(data: ConnectedWalletCache): void;
export declare function getConnectedWalletCache(): ConnectedWalletCache | null;
export declare function clearConnectedWalletCache(): void;
export declare function constructPolkadotApi(options: {
    chainId: string;
    chains: Chains;
}): Promise<ApiPromise | undefined>;
export declare function getPolkadotExtensionStateByExtensionLabel(options: {
    appName?: string;
    label: string;
    providerConfigs: ProviderConfigs;
}): Promise<PolkadotExtensionState | undefined>;
export declare function switchEvmChain(options: {
    ethersProvider: ethers.providers.Web3Provider;
    chain: Chain;
}): Promise<void>;
export declare function getWalletIcon(icon: string): string;
export declare function getSolanaWalletAdapterStateByAdapterName(options: {
    name: string;
    wallets: Wallet[];
    select(walletName: WalletName | null): void;
    connect: () => Promise<void>;
}): Promise<SolanaWalletAdapterState | undefined>;
export declare function hexlifyChainId(chainId: number | string): string;
export declare function getAccountAddressExplorerUrl(chain: Chain, account: string): string | undefined;
export {};