Hyperlane (hyperlane)

Permissionless interchain messaging protocol. Supports modular security with ISMs (Interchain Security Modules).

Fact	Value
Category	Cross-chain messaging
Family	none
Namespace	`Hyperlane` on ethereum, optimism, bsc, polygon, arc, base, arbitrum, avalanche
Chains	ethereum, optimism, bsc, polygon, arc, base, arbitrum, avalanche

Notes

This is a messaging protocol, not a direct token bridge. Token bridging uses Warp Routes built on top of Hyperlane
Uses domain IDs (uint32), NOT EVM chain IDs. Common domains: Ethereum=1, Arbitrum=42161, Optimism=10 (may differ from EVM chain IDs)
Permissionless: anyone can deploy Hyperlane to a new chain without governance approval
Modular security via ISMs (Interchain Security Modules) — apps choose their own security model
Use quoteDispatch() to estimate fees before sending
delivered() to check if a message has already been processed on the destination
Finality: depends on ISM configuration, typically 1-5 minutes
On Arc (5042) interchain gas is paid in native USDC at 18 decimals, from the same balance as the USDC ERC-20 0x3600…0000. A transfer of the whole USDC balance cannot also pay its gas. Hyperlane’s CCTP-backed USDC warp route on Arc is 0x16BF93e259ee7f7074453a2948379C35C6851b71 (its quoteGasPayment(8453) was about 0.054 USDC on 2026-09-28)

On Ethereum, Hyperlane is a namespace: its contracts need no import.

function main() {
  // Ethereum's mailbox, `0xc005dc82818d67AF737725bD4bf75435d065D239`.
  require(Hyperlane.Mailbox != 0);
}

Chain	Contract	Address	In a program
Ethereum	mailbox	`0xc005dc82818d67AF737725bD4bf75435d065D239`	`Hyperlane.Mailbox`
Optimism	mailbox	`0xd4C1905BB1D26BC93DAC913e13CaCC278CdCC80D`	`Hyperlane.Mailbox`
BNB Chain	mailbox	`0x2971b9Aec44bE4eb673DF1B88cDB57b96eefe8a4`	`Hyperlane.Mailbox`
Polygon	mailbox	`0x5d934f4e2f797775e53561bB72aca21ba36B96BB`	`Hyperlane.Mailbox`
Arc	mailbox	`0x7f50C5776722630a0024fAE05fDe8b47571D7B39`	`Hyperlane.Mailbox`
Base	mailbox	`0xeA87ae93Fa0019a82A727bfd3eBd1cFCa8f64f1D`	`Hyperlane.Mailbox`
Arbitrum One	mailbox	`0x979Ca5202784112f4738403dBec5D0F3B9daabB9`	`Hyperlane.Mailbox`
Avalanche C-Chain	mailbox	`0xFf06aFcaABaDDd1fb08371f9ccA15D73D51FeBD6`	`Hyperlane.Mailbox`

import HyperlaneMailboxABI from "./protocols/hyperlane/HyperlaneMailboxABI.json"; Speaks for: mailbox.

dispatch(uint32 _destinationDomain, bytes32 _recipientAddress, bytes _messageBody) payable returns (bytes32)
quoteDispatch(uint32 _destinationDomain, bytes32 _recipientAddress, bytes _messageBody) view returns (uint256)
process(bytes _metadata, bytes _message) payable
delivered(bytes32 _id) view returns (bool)