EMV Data

from iso8583sim.core.emv import parse_emv_data, build_emv_data

# Parse EMV data
emv_hex = "9F2608..."  # Raw TLV data
tags = parse_emv_data(emv_hex)

print(tags.get("9F26"))  # Application Cryptogram
print(tags.get("9F27"))  # Cryptogram Information Data

# Build EMV data
tags = {
    "9F26": "1234567890ABCDEF",
    "9F27": "80",
    "9F10": "0110A00003220000",
}
emv_hex = build_emv_data(tags)

┌───────────────┬───────────────┬────────────────────────┐
│     Tag       │    Length     │         Value          │
│   (1-3 bytes) │   (1-3 bytes) │    (Length bytes)      │
└───────────────┴───────────────┴────────────────────────┘

emv_data = (
    "9F2608ABCDEF0123456789"  # Cryptogram
    "9F2701"                   # CID length
    "80"                       # CID value (ARQC)
    "9F100706010A03A40000"     # Issuer Application Data
)

tags = parse_emv_data(emv_data)

print(tags)
# {
#     "9F26": "ABCDEF0123456789",
#     "9F27": "80",
#     "9F10": "06010A03A40000"
# }

from iso8583sim.core.parser import ISO8583Parser

parser = ISO8583Parser()
message = parser.parse(raw_message)

if message.emv_data:
    cryptogram = message.emv_data.get("9F26")
    cid = message.emv_data.get("9F27")

    if cid == "80":
        print("Online authorization requested (ARQC)")
    elif cid == "40":
        print("Offline approved (TC)")
    elif cid == "00":
        print("Offline declined (AAC)")

from iso8583sim.core.emv import build_emv_data

tags = {
    "9F26": "1234567890ABCDEF",
    "9F27": "80",
    "9F10": "0110A00003220000",
    "9F37": "12345678",
    "9F36": "0001",
}

field_55 = build_emv_data(tags)
print(field_55)  # "9F26081234567890ABCDEF9F27018..."

from iso8583sim.core.types import ISO8583Message
from iso8583sim.core.emv import build_emv_data

emv_tags = {
    "9F26": "1234567890ABCDEF",
    "9F27": "80",
}

message = ISO8583Message(
    mti="0100",
    fields={
        0: "0100",
        2: "4111111111111111",
        3: "000000",
        4: "000000025000",
        55: build_emv_data(emv_tags),
    }
)

from iso8583sim.demo import generate_emv_auth

# Generate EMV authorization with demo data
message = generate_emv_auth(
    pan="4111111111111111",
    amount=25000,
    cryptogram="1234567890ABCDEF",
)

print(message.fields.get(55))  # Contains built EMV TLV data