LayerZero V2

Overview

Melt uses LayerZero V2 as its cross-chain messaging layer. Both MeltHub and MeltBridge extend the OApp (Omnichain Application) base contract.

Message Flow

Bridge In (Source → HyperEVM)

MeltBridge.bridge()
  └─ Encodes payload: (originalToken, recipient, amount, toCore)
  └─ Calls _lzSend() with gas options
       └─ LayerZero DVN validates & delivers
            └─ MeltHub._lzReceive() processes mint

Bridge Out (HyperEVM → Source)

MeltHub.bridgeOut()
  └─ Burns wrapped tokens
  └─ Encodes payload: (originalToken, recipient, amount)
  └─ Calls _lzSend()
       └─ LayerZero delivers
            └─ MeltBridge._lzReceive() releases locked tokens

Gas Configuration

Operation	Gas Limit
Standard bridge	200,000
Bridge with HyperCore routing	400,000 (2x multiplier)

The toCore flag doubles the gas limit because HyperCore precompile calls require additional gas.

OFT Support

MeltAsset also extends OFTCore, enabling potential future cross-chain token transfers without going through the Hub/Bridge path.

Smart Contracts

Integrations

Overview

Message Flow

Bridge In (Source → HyperEVM)

Bridge Out (HyperEVM → Source)

Gas Configuration

OFT Support

​Overview

​Message Flow

​Bridge In (Source → HyperEVM)

​Bridge Out (HyperEVM → Source)

​Gas Configuration

​OFT Support

Overview

Message Flow

Bridge In (Source → HyperEVM)

Bridge Out (HyperEVM → Source)

Gas Configuration

OFT Support