import { tEthereumAddress, tStringCurrencyUnits, EthereumTransactionTypeExtended, tStringDecimalUnits, TokenMetadataType } from '../types';
export default interface IERC20ServiceInterface {
    decimalsOf: (token: tEthereumAddress) => Promise<number>;
    getTokenData: (token: tEthereumAddress) => Promise<TokenMetadataType>;
    isApproved: (token: tEthereumAddress, userAddress: tEthereumAddress, spender: tEthereumAddress, amount: tStringCurrencyUnits) => Promise<boolean>;
    approve: (user: tEthereumAddress, token: tEthereumAddress, spender: tEthereumAddress, amount: tStringDecimalUnits) => EthereumTransactionTypeExtended;
}