LayerZero (layerzero)

Omnichain interoperability protocol enabling cross-chain messaging. Powers OFT tokens and arbitrary message passing.

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

Notes

This is a messaging protocol, not a direct token bridge. Token bridging is done via OFT (Omnichain Fungible Token) contracts built on top of LayerZero
Uses endpoint IDs (dstEid) for chain identification, NOT EVM chain IDs
The endpoint address is the same on most chains; zkSync’s and Arc’s differ
Use quote to estimate fees before sending
Finality: depends on DVN (Decentralized Verifier Network) configuration, typically 1-5 minutes
Powers Stargate V2, OFT tokens, and many cross-chain dApps
On Arc (5042, eid 30417) the messaging fee msg.value is native USDC at 18 decimals, from the same balance as the USDC ERC-20 0x3600…0000

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

function main() {
  // Ethereum's endpointV2, `0x1a44076050125825900e736c501f859c50fE728c`.
  require(Layerzero.EndpointV2 != 0);
}

Chain	Contract	Address	In a program
Ethereum	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Optimism	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
BNB Chain	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Polygon	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
zkSync Era	endpointV2	`0xd07C30aF3Ff30D96BDc9c6044958230Eb797DDBF`	`Layerzero.EndpointV2`
Arc	endpointV2	`0x6F475642a6e85809B1c36Fa62763669b1b48DD5B`	`Layerzero.EndpointV2`
Base	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Arbitrum One	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Avalanche C-Chain	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Linea	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`
Scroll	endpointV2	`0x1a44076050125825900e736c501f859c50fE728c`	`Layerzero.EndpointV2`

import LayerZeroEndpointV2ABI from "./protocols/layerzero/LayerZeroEndpointV2ABI.json"; Speaks for: endpointV2.

send((uint32 dstEid, bytes32 receiver, bytes message, bytes options, bool payInLzToken) _params, address _refundAddress) payable returns ((bytes32 guid, uint64 nonce, (uint256 nativeFee, uint256 lzTokenFee) fee) receipt)
quote((uint32 dstEid, bytes32 receiver, bytes message, bytes options, bool payInLzToken) _params, address _sender) view returns ((uint256 nativeFee, uint256 lzTokenFee) fee)