PhoneInputFormatter.replacePhoneMask(
    countryCode: 'RU',
    newMask: '+0 (000) 000 00 00',
);
PhoneInputFormatter.addAlternativePhoneMasks(
    countryCode: 'BR',
    alternativeMasks: [
    '+00 (00) 0000-0000',
    '+(00) 00000',
    '+00 (00) 00-0000',
    ],
);
/// There is also a possibility to enter endless phones 
/// by setting allowEndlessPhone to true 
/// this means that you can enter a phone number of any length
/// its part that matches a mask will be formatted 
/// and the rest will be entered unformatted
/// is will allow you to support any phones (even those that are not supported by the formatter yet)
PhoneInputFormatter(
    onCountrySelected: _onCountrySelected,
    allowEndlessPhone: true,
)

import 'package:flutter_multi_formatter/flutter_multi_formatter.dart';

/// for phone numbers with a fully automated detection
PhoneInputFormatter

/// for anything that can be masked
MaskedInputFormatter

/// for credit / debit cards
CreditCardNumberInputFormatter
CreditCardCvcInputFormatter
CreditCardExpirationDateFormatter

/// for any inputs where you need to restrict or
/// allow some characters
RestrictingInputFormatter

/// for currencies
MoneyInputFormatter
PosInputFormatter

/// a simple check if its a BTC wallet or not, regardless of its type
bool isBitcoinWalletValid(String value);

/// a bit more complicated check which can return the type of 
/// BTC wallet and return SegWit (Bech32), Regular, or None if 
/// the string is not a BTC address
BitcoinWalletType getBitcoinWalletType(String value);

/// Detailed check, for those who need to get more details 
/// of the wallet. Returns the address type, the network, and 
/// the wallet type along with its address. 
/// It always returns BitcoinWalletDetails object. To check if it's
/// valid or not use bitcoinWalletDetails.isValid getter
/// IMPORTANT The BitcoinWalletDetails class overrides an 
/// equality operators so two BitcoinWalletDetails objects can be 
/// compared simply like this bwd1 == bwd2
BitcoinWalletDetails getBitcoinWalletDetails(String? value);

import 'package:flutter_multi_formatter/flutter_multi_formatter.dart';

String toNumericString(String text);

import 'package:flutter_multi_formatter/flutter_multi_formatter.dart';

bool isDigit(String character);

import 'package:flutter_multi_formatter/flutter_multi_formatter.dart';

String toCurrencyString(String value, {
    int mantissaLength = 2,
    /// in case you need a period as a thousand separator
    /// simply change ThousandSeparator.Comma to ThousandSeparator.Period
    /// and you will get 1.000.000,00 instead of 1,000,000.00
    ThousandSeparator thousandSeparator = ThousandSeparator.Comma,
    ShorteningPolicy shorteningPolicy = ShorteningPolicy.NoShortening,
    String leadingSymbol = '',
    String trailingSymbol = '',
    bool useSymbolPadding = false
});

print(toCurrencyString('123456', leadingSymbol: MoneySymbols.DOLLAR_SIGN)); // $123,456.00

/// the values can also be shortened to thousands, millions, billions... 
/// in this case a 1000 will be displayed as 1K, and 1250000 will turn to this 1.25M
var result = toCurrencyString(
    '125000', 
    leadingSymbol: MoneySymbols.DOLLAR_SIGN,
    shorteningPolicy: ShorteningPolicy.RoundToThousands
); // $125K

result = toCurrencyString(
    '1250000', 
    leadingSymbol: MoneySymbols.DOLLAR_SIGN,
    shorteningPolicy: ShorteningPolicy.RoundToMillions
); // 1.25M

import 'package:flutter_multi_formatter/flutter_multi_formatter.dart';

var someNumericValue = 123456;
print(someNumericValue.toCurrencyString(leadingSymbol: MoneySymbols.DOLLAR_SIGN)); // $123,456.00

var someNumericStringValue = '123456';
print(someNumericStringValue.toCurrencyString(trailingSymbol: MoneySymbols.EURO_SIGN)); // 123,456.00€

Unfocuser()

@override
Widget build(BuildContext context) {
return Unfocuser(
    child: Scaffold(
    body: SingleChildScrollView(
        child: Padding(
        padding: const EdgeInsets.all(30.0),
        child: Form(
            key: _formKey,
            child: Column(
            children: <Widget>[
                TextFormField(
                keyboardType: TextInputType.phone,
                inputFormatters: [
                    PhoneInputFormatter()
                ],
                ),
            ],
            ),
        ),
        ),
    ),
    ),
);
}

PhoneInputFormatter()

TextFormField(
    keyboardType: TextInputType.phone,
    inputFormatters: [
        PhoneInputFormatter()
    ],
),

TextFormField(
    keyboardType: TextInputType.phone,
    inputFormatters: [
        PhoneInputFormatter(onCountrySelected:  (PhoneCountryData countryData) {
            print(countryData.country);
        });
    ],
),

CreditCardNumberInputFormatter()

class CardSystem {
  static const String VISA = 'Visa';
  static const String MASTERCARD = 'Mastercard';
  static const String JCB = 'JCB';
  static const String DISCOVER = 'Discover';
  static const String MAESTRO = 'Maestro';
  static const String AMERICAN_EXPRESS= 'Amex';
}

TextFormField(
    keyboardType: TextInputType.number,
    inputFormatters: [
        CreditCardNumberInputFormatter(onCardSystemSelected:  (CardSystemData cardSystemData) {
            print(cardSystemData.system);
        });
    ],
),

/// there's also a method to format a number as a card number
/// the method is located in a credit_card_number_input_formatter.dart file
String formatAsCardNumber(
String cardNumber, {
    bool useSeparators = true,
});

/// and a method to check is a card is valid
bool isCardValidNumber(String cardNumber);
/// but it will return true only if the card system is supported, 
/// so you should not really rely on that

MaskedInputFormatter()

/// # matches any character and 0 matches digits
/// so, in order to format a string like this GHJ45GHJHN to GHJ-45-GHJHN
/// use a mask like this
TextFormField(
    keyboardType: TextInputType.phone,
    inputFormatters: [
        MaskedInputFormatter('###-00-#####')
    ],
),

/// in this scenario, the # symbol will only match uppercase latin letters
TextFormField(
    keyboardType: TextInputType.phone,
    inputFormatters: [
        MaskedInputFormatter('###-00-#####', anyCharMatcher: RegExp(r'[A-Z]'))
    ],
),

MoneyInputFormatter()

TextFormField(
    keyboardType: TextInputType.number,
    inputFormatters: [
        MoneyInputFormatter(
            leadingSymbol: MoneySymbols.DOLLAR_SIGN
        )
    ],
),
...

TextFormField(
    keyboardType: TextInputType.number,
    inputFormatters: [
        MoneyInputFormatter(
            trailingSymbol: MoneySymbols.EURO_SIGN,
            useSymbolPadding: true,
            mantissaLength: 3 // the length of the fractional side
        )
    ],
),

PosInputFormatter

TextFormField(
    keyboardType: TextInputType.number,
    inputFormatters: [
        PosInputFormatter(),
    ],
),
...


For more details see [example](https://github.com/caseyryan/flutter_multi_formatter/tree/master/example) project. And feel free to open an issue if you find any bugs of errors