Chains

Sei operates three distinct chains, each serving different purposes: mainnet, testnet, and devnet. Below is an overview of each chain, including their purposes and chain IDs.

• Mainnet

The pacific-1 chain is the mainnet of the Sei blockchain. It is the live, production environment where actual transactions and smart contract deployments occur. This chain is used for all real-world applications and activities involving Sei tokens.

• Purpose: Production environment for live applications.

• Chain ID: pacific-1

• Testnet

The atlantic-2 chain is the testnet of the Sei blockchain. It is used for testing and development purposes. Developers can deploy and test their dApps and smart contracts in a controlled environment that simulates the mainnet conditions. This chain is crucial for ensuring that applications work as expected before going live.

• Purpose: Testing and development environment.

• Chain ID: atlantic-2

• Devnet

The arctic-1 chain is the devnet of the Sei blockchain. It serves as a development network for early-stage testing and experimentation. This chain is typically used by developers to test new features, perform integration testing, and develop prototypes in an isolated environment.

• Purpose: Early-stage development and experimentation.

• Chain ID: arctic-1

• Local Chains

Please read the Nodes Introduction section for more information on how to set up and run a local chain.