The Lab

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TagDescriptionRequiredValuesExample
8BeginStringYesMust be "FIXT.1.1".FIXT.1.1
9BodyLengthYesMessage length, in bytes, forward to the CheckSum field.109
34MsgSeqNumYes1..n1
49SenderCompIDYesIgnored by Whisperer - may be anything descriptive identifying the userMF-created and assigned MFAPI usernameMyUsernameUAT_ClientA_TestUserY
56TargetCompIDYes<VenueName>.<SessionType>
VenueName is MF-defined and provided
SessionType: Indicates desired session type for user, bilaterally agreed with MF. One of {Pricing | Orders | RFS | DropCopy}
qa-360t.RFS
52SendingTimeYes

YYYYMMDD-HH:MM:SS.sssssssss

The fractions of seconds may be empty when no fractions of seconds are conveyed (in such a case the period is not conveyed).

It may include 3 digits to convey milliseconds, 6 digits to convey microseconds, 9 digits to convey nanoseconds.

20200812-08:31:06.527

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TagDescriptionRequiredValuesExample

Standard HeaderYes

98EncryptMethodYesMust be '0' (Unencrypted)0
108HeartBtIntYes

Integer between 0-300 inclusive.
Heartbeat-generation interval in seconds. 

30
141ResetSeqNumFlagNoIf populated, must be 'N' (Do not reset sequence numbers)N
789NextExpectedMsgSeqNumYesProvided by MFAPI Client to support MF message gap checks. If equal to the next-to-be-assigned MF sequence then Whisperer will respond with a LogonResponse message and then proceed with the session as normal. If lower, then Whisperer will respond with a LogonResponse message and immediately (re)send persisted messages or GapFills, in order. On completion, it will proceed with the session as normal. If higher, then Whisperer will respond with a Logout message to abort the session.1234
553UsernameYesMF-created and assigned MFAPI username. This is the same value as the Client SenderCompID.MyUsernameMyUserName
554PasswordYesMF-created password for userMyPassword
58TextNoFree-form text string the client may wish to use for support purposes.Start of Session

Standard TrailerYes

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