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Introduction to Celo Layer 2

Celo is evolving from a standalone EVM-compatible Layer 1 blockchain to an Ethereum Layer 2. Initially proposed by cLabs in July 2023, the Celo L2 aims to deliver a seamless user experience comparable to Celo L1, characterized by its ease, speed, and low transaction costs. For detailed information on the CEL2 announcement, refer to the cLabs proposal.

Dango Testnet

The Dango Testnet is the inaugural Celo Layer 2 public test network, designed for developers building on Cel2. Its primary objectives include:

  • Demonstrating a successful state migration with operational continuity.
  • Establishing a robust foundation for future developments.

Based on the current state of Alfajores, Dango will run concurrently with it, allowing infrastructure providers (e.g., RPC providers, indexers, and oracles) to familiarize themselves with the L2 codebase. Once these providers are prepared, the process of upgrading each existing Celo testnet will commence, starting with Alfajores followed by Baklava. The final step will be upgrading the Celo mainnet through a hardfork and governance proposal.

Dango Features

Dango preserves the majority of Celo's feature set, and introduces some new features, including:

  • Full Alfajores history and state
  • CELO token duality (ability to use CELO natively and as an ERC20 token)
  • Fee abstraction (ability to pay for gas with tokens)
  • Native Bridging to and from the L1
  • Data Availability via EigenDA
  • Staking
  • Ultragreen Money
warning

The Dango Testnet is designed preliminary for testing and experimentation by developers. Its tokens hold no real world economic value. You may encounter bugs and limitations with the software and documentation.

Getting Started with Dango

Information and resources to get you started:

warning

Please note that the Dango chain ID remains the same as Alfajores, ensuring seamless functionality but introducing the possibility of replay attacks where transactions could be replayed between Dango and Alfajores.

CeloCLI

  1. Setup celo-cli
celocli config:set --node https://forno.dango.celo-testnet.org/
  1. Check balance of a Cel2 account
celocli account:balance $ACCOUNT_ADDRESS --node https://forno.dango.celo-testnet.org/