The $Celo Foundation has announced the successful launch of the Layer-2 testnet Dango, which is built on Optimism's $OP Stack and utilizes EigenDA technology to maintain low transaction fees. The Dango testnet retains all historical data from the Alfajores testnet and introduces several new features, such as bridging WETH and ERC-20 tokens, reducing block time to 2 seconds, supporting multiple ERC-20 tokens as gas currencies, and sending funds via SocialConnect. Additionally, $Celo plans to officially launch the Layer-2 mainnet in early winter 2024.