HRMP Channels

Overview

Discover Horizontal Relay-routed Message Passing (HRMP) channels in Polkadot. Learn how parachains establish and use these channels for interoperability.

Opening HRMP Channels Between Parachains

Learn how to open HRMP channels between parachains on Polkadot. Discover the step-by-step process for establishing uni- and bidirectional communication.

Opening HRMP Channels with System Parachains

Learn how to open HRMP channels with Polkadot system parachains. Discover the process for establishing bi-directional communication using a single XCM message.