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Use this guide when you want to bridge an existing ERC20 from another chain (e.g. Sepolia) to Berachain using LayerZero V2 and the OFT (Omnichain Fungible Token) standard.

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Repository

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Official documentation

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Requirements

  • Node v20.11.0 or greater, npm
  • Wallet with Berachain testnet $BERA — bArtio Faucet
  • Wallet with Sepolia $UNI (or other source token) — see README for faucet/Uniswap
  • Foundry

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Stack

Solidity, Foundry (Forge scripts), Node.js, LayerZero V2 OFT.

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Quick start

  1. Clone and install 
    git clone https://github.com/berachain/guides.git && cd guides/apps/layerzero-oft
npm install
  2. Create .env with PRIVATE_KEY, SEPOLIA_ADAPTER_ADDRESS, BERACHAIN_OFT_ADDRESS (fill addresses after deploying).
  3. Deploy adapter on Sepolia 
    forge script script/MyAdapter.s.sol --rpc-url https://rpc.sepolia.org/ --broadcast
    Set SEPOLIA_ADAPTER_ADDRESS in .env.
  4. Deploy OFT on Berachain 
    forge script script/MyOFT.s.sol --rpc-url https://bartio.rpc.berachain.com/ --broadcast
    Set BERACHAIN_OFT_ADDRESS in .env.
  5. Bridge tokens 
    forge script script/Bridge.s.sol --rpc-url https://rpc.sepolia.org/ --broadcast

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Key files

PurposePath
Source chain adapterscript/MyAdapter.s.sol (and source)
Berachain OFTscript/MyOFT.s.sol (and source)
Bridge scriptscript/Bridge.s.sol