R-Chain (Relay)

IBC-like cross-chain message relay with ordered and unordered channels. Sequence numbers, Merkle proof verification, and session-ready receipt commitments.

Chain Overview Explorer Source

Overview

The Relay Chain provides IBC-compatible cross-chain message passing between Lux chains and external IBC-enabled networks. It supports both ordered channels (guaranteed delivery order) and unordered channels (best-effort delivery).

Messages are verified through Merkle proofs, with sequence numbers preventing replay attacks. Receipt commitments enable session-aware protocols where both sides can confirm message delivery.

R-Chain extends Lux Network's interoperability beyond simple asset bridges to general-purpose cross-chain communication — enabling cross-chain smart contract calls, governance votes, and data sharing.

Technical Specifications

ProtocolIBC-compatible

ChannelsOrdered / Unordered

VerificationMerkle proofs

OrderingSequence numbers

ReceiptsCommitment-based

Chain TypeOptional

Features

IBC-compatible message protocol

Ordered and unordered channels

Sequence number tracking

Merkle proof verification

Receipt commitments

Cross-chain smart contract calls

Quick Start

Install the Lux SDK and start interacting with Relay Chain.

Installation

npm install luxnet

Example

import { RelayClient } from 'luxnet/relay'

const relay = new RelayClient('https://relay.lux.network')

// Send a cross-chain message
const msg = await relay.sendMessage({
  sourceChain: 'lux-c',
  destChain: 'cosmos-hub',
  channel: 'channel-0',
  data: encodedPayload,
})

SDKs & Libraries

JavaScript SDK

npm i luxnet

Go SDK

go get github.com/luxfi/sdk

Smart Contracts

npm i @luxfi/contracts

Wallet SDK

npm i @luxfi/wallet-sdk

API Reference

Full API reference documentation is available at docs.lux.network.

View Full API Docs

G-Chain (Graph)

I-Chain (Identity)