Domain identifiers
Unique IDs for each Hyperlane-supported chain
Note that Abacus domain IDs have no relationship with EVM chain IDs, as Abacus will eventually support non-EVM chains.
Hyperlane uses proprietary domain IDs to reference each Hyperlane-supported chain.
When sending a message, users must provide the domain ID of the destination chain. When receiving a message, the recipient will be passed the domain ID of the origin chain.

Mainnet

Network
Domain Identifier (uint32)
Arbitrum
0x617262
Avalanche
0x61766178
BSC
0x627363
Celo
0x63656c6f
Ethereum
0x657468
Optimism
0x6f70
Polygon
0x706f6c79

Testnet

Network
Domain Identifier (uint32)
Alfajores
1000
ArbitrumRinkeby
0x61722d72
BSC Testnet
0x62732d74
Fuji
43113
Goerli
5
Kovan
3000
Mumbai
80001
OptimismKovan
0x6f702d6b
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