BankInputMask class sealed

Describes how a BankMaskedInputField filters, formats, and validates what the user types.

Built-in masks:

• BankInputMask.iban: uppercase alphanumerics in groups of four, capped at 34 characters, validated with the ISO 13616 mod-97 checksum.
• BankInputMask.cardPan: digits in groups of four, capped at 19, validated with the Luhn checksum; can obscure all but the last four digits.
• BankInputMask.sortCode: six-digit UK sort code shown as NN-NN-NN.
• BankInputMask.custom: arbitrary digit patterns such as '## ### ###'.

The checksum routines are also available directly via the static isValidIban and isValidLuhn hooks for use in form-level validation.

Constructors

BankInputMask.cardPan({bool obscureAllButLast4})

Payment-card primary account number mask.

const

factory

BankInputMask.custom(String pattern, {String digitChar})

Custom digit mask driven by pattern.

const

factory

BankInputMask.iban()

International Bank Account Number mask.

const

factory

BankInputMask.sortCode()

UK sort code mask rendered as NN-NN-NN.

const

factory

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

validate(String raw) → bool

Returns true when the raw (unmasked) raw value passes this mask's validation: mod-97 for IBAN, Luhn for card PAN, and completeness for sort codes and custom patterns.

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

isValidIban(String input) → bool

Returns true when input is a structurally valid IBAN with a correct ISO 13616 mod-97 checksum. Spaces are ignored and letters are case-insensitive.

isValidLuhn(String input) → bool

Returns true when the digits in input pass the Luhn checksum and form a plausible card number (12–19 digits). Non-digits are ignored.