A (Logon)

The A (Logon) message is used to initiate a FIX session between two parties. It serves as the initial message in the FIX protocol sequence, and is sent by both the initiating (client) and responding (server) party to establish and authenticate the connection.

Tag	Name	Type	Required	Description
98	`EncryptMethod`	`Int`	yes	Method of encryption. Supported values: `0` - none
108	`HeartBtInt`	`Int`	yes	Heartbeat interval in seconds. Same value used by both sides.
141	`ResetSeqNumFlag`	`Boolean`	no	Indicates whether the receiving party should reset its sequence number to 1. Supported values: `Y` - reset `N` - no reset
553	`Username`	`UUID`	yes, by Revolut FIX Gateway	Provided to client securely.
554	`Password`	`String`	yes, by Revolut FIX Gateway	Provided to client securely.

For a sample message and other details, see FIX 4.4 : Logon <A> message in the FIX 4.4 documentation.

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