Cel2 FAQ

How do I run a node or upgrade an existing node?

See the L2 Migration Guide.

For Alfajores, here are the related assets:

• Full migrated chaindata
• Rollup deploy config
• L1 contract addresses
• L2 allocs
• rollup.json
• Genesis used for snap syncing
• Container images:
  • op-geth
  • op-node
  • eigenda-proxy
• p2p peers:

  • op-geth bootnode/peers, to be used with op-geth --bootnodes flag:

    enode://ac0f42fa46f8cc10bd02a103894d71d495537465133e7c442bc02dc76721a5f41761cc2d8c69e7ba1b33e14e28f516436864d3e0836e2dcdaf032387f72447dd@34.83.164.192:30303
    enode://596002969b8b269a4fa34b4709b9600b64201e7d02e2f5f1350affd021b0cbda6ce2b913ebe24f0fb1edcf66b6c730a8a3b02cd940f4de995f73d3b290a0fc92@34.82.177.77:30303
    enode://3619455064ef1ce667171bba1df80cfd4c097f018cf0205aaad496f0d509611b7c40396893d9e490ee390cd098888279e177a4d9bb09c58387bb0a6031d237f1@34.19.90.27:30303
    enode://e3c54db6004a92d4ee87504f073f3234a25759b485274cc224037e3e5ee792f3b482c3f4fffcb764af6e1859a1aea9710b71e1991e32c1dee7f40352124bb182@35.233.249.87:30303
    enode://674410b34fd54c8406a4f945292b96111688d4bab49aecdc34b4f1b346891f4673dcb03ed44c38ab467ef7bec0b20f6031ad88aa1d35ce1333b343d00fa19fb1@34.168.43.76:30303

  • op-node static peers, to be used with op-node --p2p.static flag:

    /ip4/35.197.25.52/tcp/9222/p2p/16Uiu2HAmQEdyLRSAVZDr5SqbJ1RnKmNDhtQJcEKmemrVxe4FxKwR
    /ip4/34.105.22.4/tcp/9222/p2p/16Uiu2HAm1SZBDSugT5MMu7vBY8auDgfZFNhoDeXPLc9Me5FsAxwT
    /ip4/34.83.209.168/tcp/9222/p2p/16Uiu2HAmGJAiUX6HLSo4nLh8T984qxzokwL23cVsYuNZy2SrK7C6
    /ip4/34.83.214.149/tcp/9222/p2p/16Uiu2HAmAko2Kr3eAjM7tnshtEhYrxQYfKUvN2kwiygeFoBAoi8S
    /ip4/34.169.5.52/tcp/9222/p2p/16Uiu2HAmKc6YKHzYgsjBDaj36uAufxpgZFgrzDqVBt6zTPwdhhJD

Can I use an RPC endpoint with Alfajores?

• Ethereum JSON-RPC endpoint: https://alfajores-forno.celo-testnet.org (op-geth kind)
• OP RPC endpoint: https://op.alfajores.celo-testnet.org/ (op-node kind)

Is there an Alfajores faucet? Where? How do I get funds?

Faucet: https://faucet.celo.org/alfajores

Is there an Alfajores explorer?

Blockscout Explorer: https://celo-alfajores.blockscout.com/

How can I use the native bridge with Alfajores?

Through the Superbridge UI: https://superbridge.app/celo-testnet or https://testnets.superbridge.app/celo-testnet.

What’s the difference between Dango and Alfajores?

Alfajores is the first testnet of the Celo L1 blockchain, launched in July 2019. It was upgraded to L2 in September 2024. For more details, refer to the Alfajores Testnet documentation.

Dango was the first testnet of the Celo L2 blockchain, launched in July 2024 and shut down in October 2024. It served as a test run for the Alfajores migration to L2. Dango diverged from Alfajores L1 at block 24940100.

Is there anything that used to work on Alfajores that doesn’t anymore?

See L1→L2 Migration Changes.

Celo L2 setup

How is the Celo L2 different to Optimism?

See Celo L2 Specification.

What are the costs for L1 data and how are they paid?

For the testnet L1 data fees are covered by us, see this section on L1 fees for more details.

I saw EigenDA mentioned, is it used?

Yes! See EigenDA.

What's the block time?

The block period is 1 second.

What's the throughput?

The gas limit per block is 30 million. The Alfajores testnet has a throughput of 30M gas/s. For more details, see the Alfajores specifications.

What happened to these features?

• CELO token duality? Supported, see Token Duality.
• Fee currencies? Supported, see Fee Abstraction.
• Epoch rewards? Supported in Alfajores and Mainnet, see Epochs and Rewards.

Not sure what you need to do?

Check out the L2 Migration decision tree.