pyiso8583_encode_decode_message_with_binary_spec.py

1import pyiso8583
2from pyiso8583.specs import b_spec
3
4# Define the message structure (spec)
5# Here we use the built-in 'b_spec' (Binary Spec) as a base
6spec = b_spec
7
8# Create a message dictionary
9# MTI: Message Type Indicator
10# Data elements: field number as key
11message_data = {
12    't': '0200',        # MTI
13    '3': '000000',      # Processing code
14    '4': '000000001000',# Amount
15    '11': '123456',     # Systems trace audit number
16}
17
18# Encode the message to bytes
19encoded_message, _ = pyiso8583.encode(message_data, spec)
20print(f"Encoded: {encoded_message.hex()}")
21
22# Decode the message back to a dictionary
23decoded_message, _ = pyiso8583.decode(encoded_message, spec)
24print(f"Decoded MTI: {decoded_message['t']}")
25print(f"Decoded Field 4: {decoded_message['4']}")