Overview
An alternative to Reactive transport can be Hyperlane Mailboxes. Hyperlane is a modular interoperability protocol for cross-chain messaging. Its core component, the Mailbox contract, is deployed on each supported blockchain. The Mailbox acts as both the entry and exit point for cross-chain messages, allowing smart contracts to transmit and receive data across networks.
Hyperlane/Reactive Transport Comparison
| Category | Hyperlane | Reactive |
|---|---|---|
Pros | ✅ Decentralized and highly secure | 🚀 Direct execution without relayers → faster and cheaper |
| 🌐 Broad chain and dApp compatibility | 🔁 Deterministic finality with minimal latency | |
| 💸 Entire flow can be funded in REACT | ⚙️ Supports arbitrary function calls — `no handle()` constraint | |
| 💸 Cost-efficient, fees only cover raw gas on both ends | ||
Cons | ⚠️ Relayer-dependent, operational and liveness risks | 🧱 Smaller but growing ecosystem |
| 🐢 Slower due to multi-step message relay and network latency | ⚠️ Higher trust assumptions due to controlled execution environment | |
| 🔒 Requires `handle()` interface on the destination contract | 💰 Gas must be paid in REACT on Reactive Network and the native token on destination for full execution | |
| 💰 Higher cost due to relayer fee overhead |
Hyperlane Mailboxes
Hyperlane Demo
See our Hyperlane Demo to understand how to deploy contracts and send messages with Hyperlane mailboxes.
| Chain | Origin | Destination | Chain ID | Mailbox Address | Recommended RPC URL |
|---|---|---|---|---|---|
| Ethereum Mainnet | ✅ | ✅ | 1 | 0xc005dc82818d67AF737725bD4bf75435d065D239 | Find on Chainlist |
| Binance Smart Chain | ✅ | ✅ | 56 | 0x2971b9Aec44bE4eb673DF1B88cDB57b96eefe8a4 | Find on Chainlist |
| Avalanche C-Chain | ✅ | ✅ | 43114 | 0xFf06aFcaABaDDd1fb08371f9ccA15D73D51FeBD6 | Find on Chainlist |
| Base Chain | ✅ | ✅ | 8453 | 0xeA87ae93Fa0019a82A727bfd3eBd1cFCa8f64f1D | Find on Chainlist |
| Sonic Mainnet | ✅ | ✅ | 146 | 0x3a464f746D23Ab22155710f44dB16dcA53e0775E | Find on Chainlist |
| Reactive Mainnet | ✅ | ✅ | 1597 | 0x3a464f746D23Ab22155710f44dB16dcA53e0775E | https://mainnet-rpc.rnk.dev/ |