import { Asset, Chain } from '@xchainjs/xchain-util';
import { BigNumberish } from 'ethers';
import { Tx } from '../../types';
import { ETHTransactionInfoV2, GasOracleResponseV2, TokenBalanceParamV2, TokenTransactionInfoV2, TransactionHistoryParamV2 } from './etherscan-api-types-v2';
/**
 * Filter self txs
 *
 * @returns {T[]}
 *
 **/
export declare const filterSelfTxs: <T extends {
    from: string;
    to: string;
    hash: string;
}>(txs: T[]) => T[];
/**
 * Check if the symbol is valid.
 *
 * @param {string|null|undefined} symbol
 * @returns {boolean} `true` or `false`.
 */
export declare const validateSymbol: (symbol?: string | null) => boolean;
/**
 * Get transactions from ETH transaction
 *
 * @param {ETHTransactionInfo} tx
 * @returns {Tx} The parsed transaction.
 */
export declare const getTxFromEthTransaction: (tx: ETHTransactionInfoV2, gasAsset: Asset, decimals: number) => Tx;
/**
 * Get transactions from token tx
 *
 * @param {TokenTransactionInfo} tx
 * @returns {Tx|null} The parsed transaction.
 */
export declare const getTxFromTokenTransaction: (tx: TokenTransactionInfoV2, chain: Chain, decimals: number) => Tx | null;
/**
 * SafeGasPrice, ProposeGasPrice And FastGasPrice returned in string-Gwei
 *
 * @see https://etherscan.io/apis#gastracker
 *
 * @param {string} baseUrl The etherscan node url.
 * @param {number} chainId The chain id identifier https://docs.etherscan.io/etherscan-v2/getting-started/supported-chains.
 * @param {string} apiKey The etherscan API key. (optional)
 * @returns {GasOracleResponse} LastBlock, SafeGasPrice, ProposeGasPrice, FastGasPrice
 */
export declare const getGasOracle: (baseUrl: string, chainId: number, apiKey?: string) => Promise<GasOracleResponseV2>;
/**
 * Get token balance
 *
 * @see https://etherscan.io/apis#tokens
 *
 * @param {string} baseUrl The etherscan node url.
 * @param {string} address The address.
 * @param {string} assetAddress The token contract address.
 * @param {number} chainId The chain id identifier https://docs.etherscan.io/etherscan-v2/getting-started/supported-chains.
 * @param {string} apiKey The etherscan API key. (optional)
 * @returns {BigNumberish} The token balance
 */
export declare const getTokenBalance: ({ baseUrl, address, assetAddress, chainId, apiKey, }: TokenBalanceParamV2 & {
    baseUrl: string;
    apiKey?: string;
}) => Promise<BigNumberish>;
/**
 * Get ETH transaction history
 *
 * @see https://etherscan.io/apis#accounts
 *
 * @param {string} baseUrl The etherscan node url.
 * @param {string} address The address.
 * @param {TransactionHistoryParam} params The search options.
 * @param {number} chainId The chain id identifier https://docs.etherscan.io/etherscan-v2/getting-started/supported-chains.
 * @param {string} apiKey The etherscan API key. (optional)
 * @returns {ETHTransactionInfo[]} The ETH transaction history
 */
export declare const getGasAssetTransactionHistory: ({ gasAsset, gasDecimals, baseUrl, address, page, offset, startblock, endblock, chainId, apiKey, }: TransactionHistoryParamV2 & {
    gasAsset: Asset;
    gasDecimals: number;
    baseUrl: string;
    apiKey?: string;
}) => Promise<Tx[]>;
/**
 * Get token transaction history
 *
 * @see https://etherscan.io/apis#accounts
 *
 * @param {string} baseUrl The etherscan node url.
 * @param {string} address The address.
 * @param {TransactionHistoryParam} params The search options.
 * @param {string} apiKey The etherscan API key. (optional)
 * @returns {Tx[]} The token transaction history
 */
export declare const getTokenTransactionHistory: ({ gasDecimals, baseUrl, address, assetAddress, page, offset, startblock, endblock, chainId, apiKey, chain, }: TransactionHistoryParamV2 & {
    gasDecimals: number;
    chain: Chain;
    baseUrl: string;
    apiKey?: string;
}) => Promise<Tx[]>;