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TestRequest (35=1)

The Test Request (1) message forces a heartbeat from the opposing application. The Test Request (1) message checks sequence numbers or verifies communication line status. The opposite application responds to the Test Request (1) with a Heartbeat (0) containing the TestReqID (112).

The TestReqID (112) verifies that the opposite application is generating the heartbeat as the result of Test Request (1) and not a normal timeout. The opposite application includes the TestReqID (112) in the resulting Heartbeat (0). Any string can be used as the TestReqID (112) (one suggestion is to use a timestamp string).

Request​

Body

required
    StandardHeader objectrequired
    The header identifies the message type, length, destination, sequence number, origination point and time. Every FIX message begins with a Standard Header.
    BeginString Tag 8 (string)required

    Must be "FIX.4.4"

    BodyLength Tag 9 (integer)required

    Length of the message body in bytes

    MsgType Tag 35 (string)required

    Message Type

    MsgSeqNum Tag 34 (integer)required

    Integer message sequence number

    PossDupFlag Tag 43 (boolean)

    Indicates possible retransmission of message with this sequence number. If a message with this sequence number has been previously received, ignore message; if not, process normally.

    SenderCompID Tag 49 (string)required

    See FIX Endpoints for details

    TargetCompID Tag 56 (string)required

    See FIX Endpoints for details

    SendingTime Tag 52 (date-time)required

    Time when the message is being sent out from FIX Gateway

    PossResend Tag 97 (boolean)

    Indicates that message may contain information sent under another sequence number. Forward message to application and determine if previously received (i.e. verify order id and parameters).

    TestReqID Tag 112 (string)required

    Identifier included in Test Request (1) message to be returned in resulting Heartbeat (0)

    StandardTrailer objectrequired
    Each FIX message is terminated by a Standard Trailer as a message delimiter as well as containing the checksum value.
    CheckSum Tag 10 (string)required

    Three bytes, simple checksum. Always last field in message

Heartbeat response
Schema
    StandardHeader objectrequired
    The header identifies the message type, length, destination, sequence number, origination point and time. Every FIX message begins with a Standard Header.
    BeginString Tag 8 (string)required

    Must be "FIX.4.4"

    BodyLength Tag 9 (integer)required

    Length of the message body in bytes

    MsgType Tag 35 (string)required

    Message Type

    MsgSeqNum Tag 34 (integer)required

    Integer message sequence number

    PossDupFlag Tag 43 (boolean)

    Indicates possible retransmission of message with this sequence number. If a message with this sequence number has been previously received, ignore message; if not, process normally.

    SenderCompID Tag 49 (string)required

    See FIX Endpoints for details

    TargetCompID Tag 56 (string)required

    See FIX Endpoints for details

    SendingTime Tag 52 (date-time)required

    Time when the message is being sent out from FIX Gateway

    PossResend Tag 97 (boolean)

    Indicates that message may contain information sent under another sequence number. Forward message to application and determine if previously received (i.e. verify order id and parameters).

    TestReqID Tag 112 (string)

    Identifier included in Test Request (1) message to be returned in resulting Heartbeat (0)

    StandardTrailer objectrequired
    Each FIX message is terminated by a Standard Trailer as a message delimiter as well as containing the checksum value.
    CheckSum Tag 10 (string)required

    Three bytes, simple checksum. Always last field in message