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