Other Networks

from iso8583sim.core.types import detect_network, CardNetwork

network = detect_network("378282246310005")
assert network == CardNetwork.AMEX

from iso8583sim.core.types import ISO8583Message, CardNetwork

message = ISO8583Message(
    mti="0100",
    network=CardNetwork.AMEX,
    fields={
        0: "0100",
        2: "378282246310005",       # AMEX PAN (15 digits)
        3: "000000",
        4: "000000010000",
        11: "123456",
        22: "051",
        25: "00",
        41: "TERM0001",
        42: "MERCHANT123456 ",
    }
)

network = detect_network("6011111111111117")
assert network == CardNetwork.DISCOVER

message = ISO8583Message(
    mti="0100",
    network=CardNetwork.DISCOVER,
    fields={
        0: "0100",
        2: "6011111111111117",      # Discover PAN
        3: "000000",
        4: "000000010000",
        11: "123456",
        22: "051",
        41: "TERM0001",
        42: "MERCHANT123456 ",
    }
)

network = detect_network("3530111333300000")
assert network == CardNetwork.JCB

message = ISO8583Message(
    mti="0100",
    network=CardNetwork.JCB,
    fields={
        0: "0100",
        2: "3530111333300000",      # JCB PAN
        3: "000000",
        4: "000000010000",
        11: "123456",
        22: "051",
        25: "00",
        41: "TERM0001",
        42: "MERCHANT123456 ",
    }
)

network = detect_network("6200000000000005")
assert network == CardNetwork.UNIONPAY

message = ISO8583Message(
    mti="0100",
    network=CardNetwork.UNIONPAY,
    fields={
        0: "0100",
        2: "6200000000000005",      # UnionPay PAN
        3: "000000",
        4: "000000010000",
        11: "123456",
        22: "051",
        25: "00",
        41: "TERM0001",
        42: "MERCHANT123456 ",
        49: "156",                  # CNY (Chinese Yuan)
    }
)

# 1. Add to CardNetwork enum
class CardNetwork(Enum):
    NEW_NETWORK = "NEW_NETWORK"

# 2. Add detection rule
def detect_network(pan: str) -> CardNetwork | None:
    if pan.startswith("999"):  # Example prefix
        return CardNetwork.NEW_NETWORK
    # ... existing rules

# 3. Add field definitions
NETWORK_SPECIFIC_FIELDS[CardNetwork.NEW_NETWORK] = {
    62: FieldDefinition(...),
}

# 4. Add required fields
NETWORK_REQUIRED_FIELDS[CardNetwork.NEW_NETWORK] = [2, 3, 4, 11]