export interface HederaExtensionData {
    id: string;
    name: string;
    icon: string;
}
/**
 * Helper class to interact with WalletConnect-compatible Hedera browser extensions.
 *
 * The class is responsible for:
 * - Finding available extensions
 * - Validating extension compatibility
 * - Connecting to the extension
 * - Opening the extension popup for signing upon request
 */
export declare abstract class HederaExtensionHelper {
    static findExtensions(): Promise<HederaExtensionData[]>;
    static extensionConnect(id: string, pairingString: string): void;
    static extensionOpen(id: string): void;
    static extensionQuery(): void;
    static validateExtension(extension: any): extension is HederaExtensionData;
}
/**
 * Parses a Hedera account ID to an EVM address.
 *
 * Hedera Account IDs are in the format of `<shard>.<realm>.<account-number>`.
 * Example: `0.0.1234`:
 * - Shard: `0`
 * - Realm: `0`
 * - Account number: `1234`
 *
 * We can derive an EVM-compatible address of a Hedera account ID
 * by hex-encoding the account number and prefixing it with zeros up to 40 characters.
 *
 * This is called "account-num alias" and can be used to interact
 * with the Hedera network using standard EVM wallets.
 *
 * @see https://hips.hedera.com/hip/hip-583
 */
export declare function convertHederaAccountIdToEvmAddress(accId: string): string;
/**
 * Converts an EVM address (account-num alias) to a Hedera account ID.
 *
 * Follows the inverse logic of {@link convertHederaAccountIdToEvmAddress}
 * by converting the hex-encoded account number to a decimal number
 */
export declare function convertEvmAddressToHederaAccountId(address: string): string;
export declare function scaleHbarToWei(hbar: bigint): bigint;
export declare function scaleWeiToHbar(wei: bigint): bigint;