📞 LayerZero, Axelar & CCIP

Protocol Overviews

LayerZero

  • Function: Facilitates cross-chain messaging and asset transfers.
  • Bridging Use: Can be used for single lane NFT bridging or as part of dual lane bridging for liquid SOLID.
  • Operational Note: Recent updates have resolved previous gas estimation issues. In rare cases, manual gas top-up may be necessary.

Axelar

  • Function: Provides a low-cost, reliable bridging lane.
  • Bridging Use: Recommended for NFT bridging from childchains to Ethereum.
  • Operational Note: After an Axelar bridge, allow a 20–25 minutes finality period before reconfiguring via CCIP on Ethereum.
  • Function: Enables programmable token transfers and messaging between EVM chains.
  • Bridging Use: Preferred option for single lane veSOLID NFT bridging and used in tandem with LayerZero for liquid SOLID transfers.
  • Operational Note: Offers lower transaction costs and stable gas estimation.

Bridging Operations

Liquid SOLID Bridging

  • Configuration: Dual lane bridging is required using both LayerZero and CCIP.
  • Purpose: Ensures redundancy and reliable asset transfer for liquid SOLID.

veSOLID NFT Bridging

  • Configuration: Single lane bridging is sufficient.
  • Options: Operators may select either LayerZero or CCIP; however, CCIP is recommended for its lower cost and stable gas estimation.
  • Additional Guidance:
    • For childchain-to-Ethereum transfers, Axelar offers a low-cost alternative. After bridging via Axelar, wait 20–25 minutes and use the Reconfigure tab (via CCIP) on Ethereum to complete the process.
    • All lanes are now operational. The UI filters out unsupported providers (e.g., CCIP is unavailable on Fantom, Axelar on Sonic).

Best Practices for Operators

  • Single Lane Bridging (veSOLID NFTs):

    • Use CCIP as the primary option.
    • LayerZero remains an acceptable alternative if needed.

  • Dual Lane Bridging (Liquid SOLID):

    • Combine LayerZero and CCIP to meet the dual lane requirement.

  • Chain Compatibility:

    • Confirm provider availability via the UI. Unsupported lanes (e.g., CCIP on Fantom, Axelar on Sonic) are automatically filtered.

  • Gas Management:

    • In cases where LZ gas estimation issues occur (especially for Ethereum-to-childchain transfers), manually top up the gas or opt for CCIP.

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