> ## Documentation Index
> Fetch the complete documentation index at: https://docs.celo.org/llms.txt
> Use this file to discover all available pages before exploring further.

# Cel2 FAQ

## Mainnet

<AccordionGroup>
  <Accordion title="My node is having trouble keeping up to date with the chain head / having trouble connecting to and finding peers">
    A couple of issues could be causing this.

    * If you are running multiple instances of op-node, make sure to check that they each have a unique and persisted private key at `--p2p.priv.path`
    * Ensure that your node is accessible to other nodes, check the **Configure P2P for external network access** section under [Running a full node](/infra-partners/operators/run-node#running-a-full-node)
  </Accordion>

  <Accordion title="How do I run a node or upgrade an existing node?">
    See the guides for [running a node](/infra-partners/operators/run-node) or the guide on [how to migrate an L1 node](/infra-partners/operators/migrate-node).
  </Accordion>

  <Accordion title="Do I need to run my own EigenDA proxy?">
    Yes. This is part of [running a node](/infra-partners/operators/run-node).
    If you're using the [Docker Compose Setup](https://github.com/celo-org/celo-l2-node-docker-compose), it's included.
  </Accordion>

  <Accordion title="What happened to funds on Celo L1 after the migration to L2?">
    All balances have been carried over to the L2, unchanged.
  </Accordion>

  <Accordion title="How do ERC-20 tokens and the native CELO token work after the migration to L2?">
    There is no change and it continues to work in the same way as before.
  </Accordion>

  <Accordion title="Is Celo able to support Solidity versions above 0.8.19?">
    Yes, same as with Ethereum.
  </Accordion>

  <Accordion title="What data model changes happened in the RPC specs (esp. which gas tokens) between Celo L1 and L2?">
    Have a look at the [changes from L1 to L2 in the specs](https://specs.celo.org/l2_migration.html#changes-for-json-rpc-users).
  </Accordion>

  <Accordion title="What happens to Validators?">
    Validators are becoming [Community RPC providers](/contribute-to-celo/community-rpc-nodes/community-rpc-node).
  </Accordion>

  <Accordion title="Where can I see those [Community RPC providers](/contribute-to-celo/community-rpc-nodes/community-rpc-node)?">
    There are multiple options.

    * Install [Celo CLI](/cli/index) at version 6.1.0 or later. Then run: `celocli network:community-rpc-nodes`.
    * [Vido Node Explorer](https://dev.vido.atalma.io/celo/rpc)
    * [Celo Community RPC Gateway](https://celo-community.org/)
  </Accordion>

  <Accordion title="What happened to governance, since the migration from Celo L1 to L2?">
    [Governance](/home/protocol/governance/overview) remains a pillar of the Celo blockchain. The Validator Hotfix process has been adapted, see [Updated Governance Hotfix](https://specs.celo.org/l2_migration.html#updated-governance-hotfix) for the changes.
  </Accordion>

  <Accordion title="What happened to these features?">
    * CELO token duality? Supported, see [Token Duality](https://specs.celo.org/token_duality.html).
    * Fee currencies? Supported, see [Fee Abstraction](https://specs.celo.org/fee_abstraction.html).
    * Epoch rewards? Epochs now work differently, but rewards stay, see [Epochs and Rewards](https://specs.celo.org/smart_contract_updates_from_l1.html#epochs-and-rewards).
  </Accordion>

  <Accordion title="How is the Celo L2 different to Optimism?">
    See [What's Changed Optimism -> Celo L2](/legacy/transition/optimism/op-l2).
    Also see [Celo L2 Specification](https://specs.celo.org/root.html) for greater detail.
  </Accordion>

  <Accordion title="What are the costs for L1 data and how are they paid?">
    See [What's changed section covering L1 fees](/legacy/transition/optimism/op-l2#l1-fees).
  </Accordion>

  <Accordion title="What's the block time?">
    The block period is 1 second.
  </Accordion>

  <Accordion title="What's the throughput?">
    The gas limit per block is 30 million, so the maximum throughput is 30M gas/s.
  </Accordion>

  <Accordion title="Is there anything that used to work on Celo L1 that doesn’t anymore on L2?">
    See [What's Changed Celo L1 -> L2](/legacy/transition/whats-changed/l1-l2) and [L1 -> L2 Migration Changes](https://specs.celo.org/l2_migration.html) in the spec for greater detail.
  </Accordion>
</AccordionGroup>