Chains

Sei utilizes multiple chains for various stages of the development lifecycle. This multi-chain approach allows developers to build, deploy, manage, and iterate confidently, ensuring thorough testing and feedback before updates go live on the mainnet.

Note

All chain updates are first deployed to the devnet to ensure stability. They are then moved to the testnet for further testing and validation. Finally, the updates are released to the mainnet. This process allows developers to test their applications thoroughly and raise any concerns regarding the upgrades before they go live on the mainnet.

Mainnet

Mainnet is the live, production environment where actual transactions and smart contract deployments occur. This chain is used for all real-world applications and activities.

Purpose: Production
Chain ID: pacific-1
EVM Chain ID: 1329 or 0x531

Testnet

Testnet 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: Staging
Chain ID: atlantic-2
EVM Chain ID: 1328 or 0x530

Devnet

Devnet 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: Testing
Chain ID: arctic-1
EVM Chain ID: 713715 or 0xAE3F3

Local Chains

Developers can also run local chains on their machines for testing and development purposes. Local chains are isolated environments that mimic the behavior of the mainnet, testnet, or devnet chains. They are useful for testing new features, debugging issues, and experimenting with smart contracts with full control over all tokens and governance decisions.

Purpose: Development
Chain ID: Set by user (default: sei-chain)

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

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Tip

View more chain specific information, RPC endpoints, and Explorers for the EVM and for CosmWasm.

Chain Registry

The Sei Chain Registry contains additional information about each chain.