Module dbn::compat

Compatibility shims for different DBN versions.

Re-exports

• pub use crate::record::ErrorMsg as ErrorMsgV2;
• pub use crate::record::InstrumentDefMsg as InstrumentDefMsgV2;
• pub use crate::record::SymbolMappingMsg as SymbolMappingMsgV2;
• pub use crate::record::SystemMsg as SystemMsgV2;

Structs

• ErrorMsgV1
  An error message from the Databento Live Subscription Gateway (LSG) in DBN version 1.
• InstrumentDefMsgV1
  Definition of an instrument in DBN version 1. The record of the Definition schema.
• SymbolMappingMsgV1
  A symbol mapping message in DBN version 1 which maps a symbol of one SType to another.
• SystemMsgV1
  A non-error message from the Databento Live Subscription Gateway (LSG) in DBN version 1. Also used for heartbeating.

Constants

• SYMBOL_CSTR_LEN_V1
  The length of symbol fields in DBN version 1 (prior version being phased out).
• SYMBOL_CSTR_LEN_V2
  The length of symbol fields in DBN version 2 (current version).

Traits

• SymbolMappingRec
  A trait for symbol mapping records.

Functions

• decode_record_ref^⚠
  Decodes bytes into a RecordRef, optionally applying conversion from structs of a prior DBN version to the current DBN version, according to the version and upgrade_policy.
• version_symbol_cstr_len
  Returns the length of symbol fields in the given DBN version