@fluidframework/runtime-definitions

Contains handshake interfaces for communication between the container runtime layer and the data store runtime layer.

• IFluidDataStoreRuntimeChannel includes the minimal set of data and functionalities that are needed by the ContainerRuntime to bind and control a FluidDataStoreRuntime, including attach, snapshot, op/signal processing, request routes, and connection state notifications.
• IFluidDataStoreContext includes data and function provided by the container layer and used by the data store layer for information about the container, to send ops and signals, data store creation, etc.
• Agent/Task related interfaces, since the agent scheduler is included by default by the container layer, and data stores can make use of it
• IFluidDataStoreFactory and IFluidDataStoreRegistry definitions
• Common protocol structures that are not related to back-compat between the layer: IAttachMessage, IEnvelope, ISignalEnvelope, IInboundSignalMessage.
• IContainerRuntimeBase is a temporary interface that includes a reduced set of data and functionalities from IContainerRuntime that the IFluidDataStoreRuntimeChannel or data store writer will need from ContainerRuntime.Eventually, all of the these should be shim by the IFluidDataStoreContext

These interfaces needs to have strong back-compat guaranetee to support dynamic data store loading scenario where the FluidDataStoreRuntime might be built with different version.

See GitHub for more details on the Fluid Framework and packages within.