# Let's dive into the gem Altlayer testnet 💎

By [Walter Schmidt](https://paragraph.com/@walter-schmidt) · 2024-02-17

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🔎About the project, many posts have already been made on this channel, including the Altitude campaign. Altlayer has now launched a new testnet built on Arbitrum Orbit using the Celestia data availability layer.

With Celestia, developers will be able to deploy Orbit chains as easily as regular smart contracts in no time and with minimal setup.

As a reminder, the project raised $7 million from Polychain Capital, Jump Crypto and other funds and investors. There was also a closed funding round led exclusively by Binance Labs.

⚡️Moving on to the testnet:

*   First add the Altlayer Nitrogen network ([**https://rollup-info.altlayer.io/public/nitrogen**](https://rollup-info.altlayer.io/public/nitrogen)).
    
*   Get Sepolia $ETH from cranes: 1 ([**https://sepolia-faucet.pk910.de/**](https://sepolia-faucet.pk910.de/)), 2 ([**https://faucet-sepolia.rockx.com/**](https://faucet-sepolia.rockx.com/)), 3 ([**https://sepoliafaucet.com/**](https://sepoliafaucet.com/)), 4 ([**https://www.infura.io/faucet/sepolia**](https://www.infura.io/faucet/sepolia)).
    
*   Get Nitrogen $ETH from the faucet ([**https://www.l2faucet.com/**](https://www.l2faucet.com/)).
    
*   Bridge ([**https://bridge.arbitrum.io/?l2ChainId=96384675468**](https://bridge.arbitrum.io/?l2ChainId=96384675468)) from Sepolia to Arbitrum Sepolia, then to Altlayer Nitrogen.
    
*   Deploy a smart contract on Thirdweb, first selecting the Nitrogen network next to Deploy.
    

If anything is unclear, check out the official testnet guide ([**https://docs.altlayer.io/altlayer-documentation/external-integrations/nitrogen-orbit-celestia-testnet**](https://docs.altlayer.io/altlayer-documentation/external-integrations/nitrogen-orbit-celestia-testnet)) with pictures.

💬That’s all for now. Follow Twitter ([**https://twitter.com/alt\_layer**](https://twitter.com/alt_layer)) for further updates and announcements!

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*Originally published on [Walter Schmidt](https://paragraph.com/@walter-schmidt/let-s-dive-into-the-gem-altlayer-testnet)*