import { FeeRates, TxHistoryParams } from '@xchainjs/xchain-client';
import { Address, Asset, Chain } from '@xchainjs/xchain-util';
import { Balance, CompatibleAsset, EvmOnlineDataProvider, Tx, TxsPage } from '../../types';
export declare class CovalentProvider implements EvmOnlineDataProvider {
    private baseUrl;
    private apiKey;
    private chainId;
    private chain;
    private nativeAsset;
    private nativeAssetDecimals;
    constructor(apiKey: string, chain: Chain, chainId: number, nativeAsset: Asset, nativeAssetDecimals: number);
    getBalance(address: Address, assets?: CompatibleAsset[]): Promise<Balance[]>;
    private buildNativeTx;
    private buildNonNativeTx;
    private getTxsPage;
    getTransactions(params: TxHistoryParams): Promise<TxsPage>;
    getTransactionData(txHash: string, _assetAddress?: Address): Promise<Tx>;
    getFeeRates(): Promise<FeeRates>;
}