AffirmStatus (FIX tag 940)
AffirmStatus (tag 940) is an int field defined in FIX 4.4 and FIX 5.0 SP2. It appears in 1 message type and is required in 1 of them. It is an enumerated field with 3 defined values.
At a glance
- Tag
- 940
- Name
- AffirmStatus
- Datatype
- int
- Dialects
- FIX 4.4 and FIX 5.0 SP2
- Messages
- 1
- Valid values
- 3
What the specification says
FIX 4.4
Identifies the status of the ConfirmationAck
FIX 5.0 SP2
Specifies the affirmation status of the confirmation.
Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.
A real message using tag 940
| Tag | Field | Wire value | Meaning |
|---|---|---|---|
| 8 | BeginString | FIX.4.4 | |
| 9 | BodyLength | 119 | |
| 35 | MsgType | AU | Confirmation Ack (aka Affirmation) |
| 49 | SenderCompID | BOARTEAM | |
| 56 | TargetCompID | COUNTERPARTY | |
| 34 | MsgSeqNum | 2 | |
| 52 | SendingTime | 20240101-12:00:00.000 | |
| 664 | ConfirmID | EXAMPLE | |
| 75 | TradeDate | 20240101 | |
| 60 | TransactTime | 20240101-12:00:00.000 | |
| 940 | AffirmStatus | 1 | Received |
| 10 | CheckSum | 032 |
Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.
Generated from the FIX 4.4 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.
Valid values
A value outside this list is not a parse error — the message still decodes — but validate() reports it as validate/value-not-in-enum.
| Value | Meaning | Symbolic name |
|---|---|---|
| 1 | Received | RECEIVED |
| 2 | Confirm rejected, i.e. not affirmed | CONFIRM_REJECTED_IE_NOT_AFFIRMED / CONFIRM_REJECTED_I_E_NOT_AFFIRMED |
| 3 | Affirmed | AFFIRMED |
Where tag 940 appears
Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.
| Message | MsgType | FIX 4.4 | FIX 5.0 SP2 | Where in the message |
|---|---|---|---|---|
| ConfirmationAck | AU | Required | Required | directly on the message body |
Wire format
A whole number, optionally signed. Leading zeros are legal on the wire and are preserved in the raw value. @boarteam/fix parses the value as a number and reports parse/invalid-int when it does not lex as one; the raw string is kept either way.
Read tag 940 in TypeScript
import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix44";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const affirmStatus = message.fields[940]?.raw;// e.g. "1" — Received// The dictionary also carries the labels:const label = fix.dictionary .fieldByTag(940) ?.enumValues?.find((e) => e.value === affirmStatus) ?.description;Other int fields
- 939TrdRptStatus
- 937NetworkStatusResponseType
- 944CollAction
- 935NetworkRequestType
- 945CollInquiryStatus
- 946CollInquiryResult
- 951Nested3PartyRole
- 928StatusValue
- 926UserStatus
- 954Nested3PartySubIDType
- 924UserRequestType
- 959StrategyParameterType
- 919DeliveryType
- 963MDReportID
- 964SecurityReportID
- 911TotNumReports
- 910CollStatus
- 970PositionLimit
- 971NTPositionLimit
- 906CollAsgnRejectReason
- 905CollAsgnRespType
- 975UnderlyingSettlementType
- 903CollAsgnTransType
- 982ExpirationQtyType
Decode this in your own code
The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.
npm i @boarteam/fix @boarteam/fix-dict-fix44