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Qris parser
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| from dataclasses import dataclass, field | |
| from typing import Optional | |
| @dataclass | |
| class MerchantAccount: | |
| identifier: str = "" # 26/51 / 00 | |
| merchant_id: str = "" # 26/51 / 02 | |
| merchant_pan: str = "" # 26/51 / 01 | |
| merchant_criteria: str = "" # 26/51 / 03 | |
| @dataclass | |
| class AdditionalInfo: | |
| reference_label: str = "" # 62 / 05 | |
| terminal_label: str = "" # 62 / 07 | |
| payment_system_specified_template: str = "" # 62 / 50 | |
| @dataclass | |
| class QrisData: | |
| raw: str = "" | |
| format_indicator: str = "" # 00 | |
| initiation_method: str = "" # 01 | |
| amount: str = "" # 54 | |
| merchant_name: str = "" # 59 | |
| merchant_city: str = "" # 60 | |
| country_code: str = "" # 58 | |
| postal_code: str = "" # 61 | |
| merchant_account_1: MerchantAccount = field(default_factory=MerchantAccount) # 26 | |
| merchant_account_2: MerchantAccount = field(default_factory=MerchantAccount) # 51 | |
| additional_info: AdditionalInfo = field(default_factory=AdditionalInfo) # 62 | |
| crc: str = "" # 63 | |
| def qris_processor(result: dict) -> QrisData: | |
| qris_data = QrisData() | |
| mapping = { | |
| "00": "format_indicator", | |
| "01": "initiation_method", | |
| "54": "amount", | |
| "59": "merchant_name", | |
| "60": "merchant_city", | |
| "58": "country_code", | |
| "61": "postal_code", | |
| "26-00": "merchant_account_1.identifier", | |
| "26-01": "merchant_account_1.merchant_pan", | |
| "26-02": "merchant_account_1.merchant_id", | |
| "26-03": "merchant_account_1.merchant_criteria", | |
| "51-00": "merchant_account_2.identifier", | |
| "51-01": "merchant_account_2.merchant_pan", | |
| "51-02": "merchant_account_2.merchant_id", | |
| "51-03": "merchant_account_2.merchant_criteria", | |
| "62-05": "additional_info.reference_label", | |
| "62-07": "additional_info.terminal_label", | |
| "62-50": "additional_info.payment_system_specified_template", | |
| "63": "crc" | |
| } | |
| for t, u in result.items(): | |
| print(f"{t} : {u}") | |
| if t in mapping: | |
| attr_path = mapping[t].split(".") | |
| target = qris_data | |
| for attr in attr_path[:-1]: | |
| target = getattr(target, attr) | |
| setattr(target, attr_path[-1], u) | |
| return qris_data | |
| def parse_qris(input_string: str) -> Optional[QrisData]: | |
| index = 0 | |
| result = {} | |
| while index < len(input_string): | |
| qr_id = input_string[index:index + 2] | |
| qr_id_length = input_string[index + 2:index + 4] | |
| try: | |
| qr_id_value_length = int(qr_id_length) | |
| except ValueError: | |
| return None | |
| qr_id_value = input_string[index + 4:index + 4 + qr_id_value_length] | |
| result[qr_id] = qr_id_value | |
| if 26 <= int(qr_id) <= 40 or int(qr_id) in [51, 62]: | |
| nested_index = 0 | |
| while nested_index < len(qr_id_value): | |
| nqi = qr_id_value[nested_index:nested_index + 2] # nested qr id | |
| nqi_length = qr_id_value[nested_index + 2:nested_index + 4] | |
| nqi_value_length = int(nqi_length) | |
| nqi_value_index = int(nested_index + 4) | |
| nqi_value_index_offset = int(nested_index + 4 + nqi_value_length) | |
| nqi_value = qr_id_value[nqi_value_index:nqi_value_index_offset] | |
| result[f"{qr_id}-{nqi}"] = nqi_value | |
| nested_index += 4 + nqi_value_length | |
| index += 4 + qr_id_value_length | |
| qris_data = qris_processor(result) | |
| qris_data.raw = input_string | |
| if qris_data.merchant_account_2.identifier == 'ID.CO.QRIS.WWW': | |
| return qris_data | |
| else: | |
| return None # invalid QRIS provider |
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