Table of Contents

Class LiveGateway

Namespace
DatabentoDotNet.Live
Assembly
DatabentoDotNet.Live.dll

Derives the live gateway's host name from a dataset code.

public static class LiveGateway
Inheritance
LiveGateway
Inherited Members

Remarks

Port of upstream's determine_gateway (live/protocol.rs:26-31): lowercase the dataset and replace every . with a -, then prepend it as a subdomain of lsg.databento.com on port DefaultPort. GLBX.MDP3 becomes glbx-mdp3.lsg.databento.com:13000. Plain TCP — no TLS anywhere in the live protocol.

The dataset is not checked against the Dataset enum, deliberately. Upstream performs no validation and says so in its own doc comment, and the reason survives the port: Databento adds datasets faster than a table generated from one release of publishers.rs tracks them, so an enum check would reject a dataset that exists in favour of one this build happens to know about. Refusing to connect because our table is stale is a worse failure than a DNS error naming the host that does not resolve.

What is checked is that the transformation produced something that can be a DNS label at all — see For(string). That rejects the input a typo produces without ever claiming to know which datasets exist.

Fields

DefaultPort

The port every live gateway listens on.

public const int DefaultPort = 13000

Field Value

int

Domain

The domain the per-dataset subdomain is prepended to.

public const string Domain = "lsg.databento.com"

Field Value

string

Methods

For(string)

Returns the gateway endpoint for dataset. Resolves no DNS — the result is a DnsEndPoint naming a host, not an address.

public static DnsEndPoint For(string dataset)

Parameters

dataset string

The dataset code, in its wire spelling, such as GLBX.MDP3.

Returns

DnsEndPoint

The gateway endpoint.

Exceptions

ArgumentException

dataset is empty or white space, or the subdomain it produces could not be a DNS label: too long, or carrying a character other than a-z, 0-9 and -, or beginning or ending with -.

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