FAQ
LayerZero is a cross-chain bridge that allows exchange of crypto assets (e.g., fungible/non-fungible tokens, stablecoins) between Ethereum or Binance Smart Chain and Harmony blockchains.
The Bridge is used to migrate assets from one chain to another. If you have assets on Ethereum or Binance Smart Chain, you can use the bridge to move them to Harmony blockchain and get corresponding assets on Harmony. LayerZero also allows redemption of the exchanged assets back at any time.
You need to be able to open your wallet in the network you sent your tokens to. Check that there are no network restrictions that prevents you from it. Also check if there is no limitations on a token type you can receive.
Never send tokens to an exchange account!
No, bridging to contract address directly is not supported. It might result in permanent loss of your tokens.
Oracle 1LINK
Natives
- 1ONE (Wrapped ONE on Ethereum) - no redeploy required
- bscONE (Wrapped ONE on BSC) - no redeploy required
- ETH
- 1ETH
- bscONE (Wrapped ONE on BSC) - no redeploy required
- BNB
- bscBNB (Wrapped BnB on Harmony)
- 1WBTC
Stablecoins
- 1USDC
- 1USDT
- 1DAI
- 1BUSD
- bscBUSD
Partners
- 1AAG - no token redeploy
- 1FRAX
- 1FXS
- 1SUSHI
- xSUSHI
- 1AAVE
Assets are mapped 1:1. For example, 10 BUSD on Ethereum after bridging will be available as 10 1BUSD on Harmony. Here, “1BUSD“ is the token symbol of the token on Harmony corresponding to “BUSD“ token symbol on Ethereum.
Same 1:1 mapping holds true for Binance Smart Chain. However, the assets from two different parent chains (Ethereum or Binance Smart Chain) after bridging will be represented using different bridged assets on Harmony. For instance, 5 Binance Smart Chain BUSD after bridging will be available as 5 bscBUSD on Harmony. Here, “bscBUSD” is the token symbol of the token issued on Harmony corresponding to “BUSD” token symbol on Binance Smart Chain.
And, the 1BUSD and bscBUSD on Harmony chain are not interchangeable, meaning one cannot bridge BUSD from Ethereum to Harmony and then withdraw it on Binance Smart Chain. Same for other tokens.
There is no limit on the amount of tokens that can be bridged.
Yes: you can bridge tokens back and receive back the same amount of the original token there. For example, you bridged USDC from Ethereum to Harmony and got 1USDC token on Harmony. At any time you can bridge 1USDC back to Ethereum and receive USDC token.
No, Ethereum bridged tokens can only be sent back to Ethereum. Same applies for Binance bridged tokens.
No, do NOT send bridged tokens directly to other blockchains or exchanges. This will not work and might result in permanent loss of your tokens. Bridged tokens can only be used on Harmony network. The only way to send them out is bridging them back.
Yes. You can transfer the bridged tokens to other users, and they can redeem them back to their Ethereum or Binance accounts. This is possible because when you lock your token, it gets pooled into a bridge smart contract from which any redeem request can be serviced without tying the locked tokens and redemption to a specific user account.
Once you use LayerZero to transfer your original tokens to Harmony, the original tokens get stored and locked in the LayerZero contracts: you do not own those tokens on Ethereum or Binance anymore. You receive the same amount of tokens on the Harmony blockchain.
No: The supply of the original token never change as a result of using LayerZero: LayerZero bridge locks a certain amount of a token on Ethereum blockchain (essentially taking it out of circulation) and mints the exact same amount of tokens on the Harmony blockchain, that represents in all respects the original token (i.e. regenerating the locked supply). As a result, the circulating supply of the original token will stay the same: it's just split across two different blockchains instead of one.
It depends on which blockchain you want transfer assets from. If it is from Harmony blockchain, you need ONE tokens, if it is from Ethereum you need ETH tokens, from Binance Smart Chain (BSC) BNB tokens and so on.
Cost of the bridge operation consists of the LayerZero bridge fee and costs of transactions. You'll see the page with the fee information that you need to confirm before the operation.
Transaction fee depends on the chain gas prices and are confirmed in Metamask before the transaction.
LayerZero fees are calculated dynamically based on Oracle and Relayer prices for the destination chain. They are transferred in the same transaction as the bridges amount. Fees are paid in native tokens of the first chain, so if you transfer any token from Ethereum, you pay fees by ETH token, ONE for Harmony and BNB for Binance.
Last modified 10mo ago