endpoint

the main interface to a radio node

an endpoint wraps a QUIC socket, an Ed25519 keypair identity, a radio/relay connection, and radio/discovery services into a single handle. it is the entry point for all networking in cyber

identity

each endpoint derives an EndpointId from its Ed25519 PublicKey. the EndpointAddr bundles the id with relay URLs and direct socket addresses. connections are made by cryptographic PublicKey, not by IP address — dial keys, not addresses

transport

endpoints support three transport modes over QUIC:

• bidirectional streams (BiStream) for request-response patterns
• unidirectional streams (UniStream) for one-way data flows
• datagrams for low-latency fire-and-forget messages

QUIC provides authenticated encryption, multiplexed streams, and no head-of-line blocking. all traffic is encrypted end-to-end using keys derived through Hemera (Poseidon2) hash functions

connection to cyber

every neuron runs an endpoint. the PublicKey is the neuron's network identity on the physical network. radio connects neurons to each other and to radio/relay servers. radio/discovery resolves a bare PublicKey into a routable address, and radio/hole-punching establishes direct paths whenever possible