gstin constant

Pattern const gstin

GSTIN (Goods and Services Tax Identification Number) - 15 characters Format: 2 digit state code + 10-digit PAN + 1 entity code + 1 checksum Example: 22AAAAA0000A1Z5

Implementation

static const Pattern gstin =
    r'^[0-9]{2}[A-Z]{5}[0-9]{4}[A-Z]{1}[1-9A-Z]{1}Z[0-9A-Z]{1}$';