ActionMatchesInput returns an error if an MPA action doesn't match the message being checked in the RPCAuthInput.

MPAFromIncomingContext reads a MPA ID from the grpc metadata of an incoming RPC call.

ProxyClientStreamInterceptor will perform the MPA flow prior to making the desired streaming RPC calls through the proxy.

ProxyClientUnaryInterceptor will perform the MPA flow prior to making the desired RPC calls through the proxy.

ProxyMPAAuthzHook populates MPA information in the input message.

StreamClientIntercepter is a grpc.StreamClientInterceptor that will perform the MPA flow.

UnaryClientIntercepter is a grpc.UnaryClientIntercepter that will perform the MPA flow.

WithMPAInMetadata adds a MPA ID to the grpc metadata of an outgoing RPC call.