All RPC interfaces for a given node (see operations/configuration:``rpc_interfaces``) currently support HTTP/1.1. A specific RPC interface can also support HTTP/2 by setting the "app_protocol" configuration entry to "HTTP2" for that interface.


HTTP/2 interfaces do not currently support client requests forwarding. Client requests that require forwarding to the primary node will return a 501 HTTP error.


Operators can cap the size of client HTTP requests (body and header) for each RPC interface in the operations/configuration:``http_configuration`` configuration section. These configuration entries are optional and have sensible default values.

If a client HTTP request breaches any of these values, the client is returned a 413 or 431 HTTP error and the session is automatically closed by the CCF node.