WireFormat

iso8583sim.wire.format

`Encoding`

Bases: Enum How characters and digits are represented on the wire.

Member	Value

`WireFormat`

WireFormat(
    mti: Encoding = Encoding.ASCII,
    bitmap: str = 'binary',
    length_prefix: Encoding = Encoding.ASCII,
    numeric: Encoding = Encoding.ASCII,
    text: Encoding = Encoding.ASCII,
    binary_fields: str = 'raw',
    ebcdic_codec: str = 'cp037',
    bcd_odd_padding: str = 'left',
)

Byte layout of a message. Each part of the message can be encoded independently. Attributes

Encoding

MTI encoding: ASCII, EBCDIC or BCD

str

“binary” for 8 raw bytes per bitmap, or “hex” for 16 hex characters in the text encoding

Encoding

Encoding of LLVAR / LLLVAR length indicators: ASCII, EBCDIC, BCD or BINARY

Encoding

Encoding of numeric field content: ASCII, EBCDIC or BCD

Encoding

Encoding of alphanumeric content: ASCII or EBCDIC

str

“raw” to send binary fields (PIN block, MAC, EMV) as bytes, or “hex” to send them as hex characters in the text encoding

str

Python codec used for EBCDIC (cp037 is US/Canada, cp500 international)

str

Filler nibble position for odd-length variable BCD fields

`ascii_hex()`

def ascii_hex() -> WireFormat

Everything as ASCII text with a hex bitmap: the byte form of this library’s string messages.

`ascii_binary()`

def ascii_binary() -> WireFormat

ASCII text and numbers with a binary bitmap and raw binary fields. A common host format.

`bcd()`

def bcd() -> WireFormat

BCD MTI, numbers and lengths, binary bitmap, ASCII text. Typical of POS terminal links.

`ebcdic()`

def ebcdic() -> WireFormat

EBCDIC text and numbers with a binary bitmap. Used by IBM mainframe hosts.

`preset()`

def preset(name: str) -> WireFormat

Look up a preset by name: ascii-hex, ascii-binary, bcd or ebcdic.

Core

Security

Wire formats

Networking

LLM

Servers

Demo

`Encoding`

`WireFormat`

`ascii_hex()`

`ascii_binary()`

`bcd()`

`ebcdic()`

`preset()`

​Encoding

​WireFormat

​ascii_hex()

​ascii_binary()

​bcd()

​ebcdic()

​preset()

`Encoding`

`WireFormat`

`ascii_hex()`

`ascii_binary()`

`bcd()`

`ebcdic()`

`preset()`