Networks & Contracts

Reference information for the Espresso networks: endpoints, contract addresses, and explorers.

Espresso operates one production network and one persistent testnet. Use this page as a single source of truth for endpoints, contract addresses, and explorers. For container image tags and operator environment variables, see Run a Validator Node, which covers both networks.

For a list of chains integrated with Espresso, see Espresso Chains Reference.

Mainnet

The production Espresso. L1: Ethereum mainnet.

Status

• Current release: Mainnet (permissionless delegated proof-of-stake)

• Block explorer: https://explorer.main.net.espresso.network

• Public API endpoint: https://query.main.net.espresso.network

• Staking UI: https://stake.espresso.network/

• Delegation walkthrough: Delegate $ESP

Contracts

The contracts below let chains and other applications integrating with Espresso verify network state in a trust-minimized way. The reward claim contracts let validators and delegators claim ESP staking rewards on Ethereum. Contract addresses are listed below. For protocol architecture and implementation details, see Protocol documentation.

Contract	Description	Network	Address
Light Client	Lets chains and apps read Espresso state in a trust-minimized way	Ethereum	0x95ca91cea73239b15e5d2e5a74d02d6b5e0ae458
Stake Table	Manages validator registration and stake delegation	Ethereum	0xCeF474D372B5b09dEfe2aF187bf17338Dc704451
ESP Token	ERC-20 token used for staking and protocol fees	Ethereum	0x031De51F3E8016514Bd0963d0B2AB825A591Db9A
Fee Contract	Holds ETH deposits used to pay Espresso fees	Ethereum	0x9fcE21c3F7600Aa63392A5F5713986b39bB98884
Reward Claim	Distributes staking rewards to validators and delegators	Ethereum	0x67c966a0ecdd5c33608be7810414e5b54da878d8

Node operators

For the container image tag, genesis file, environment variables, and commands needed to point a node at Mainnet, see Run a Validator Node.

Decaf Testnet

Espresso's persistent testnet, used for testing integrations before deploying to Mainnet. L1: Ethereum Sepolia.

Status

• Status: Persistent, ongoing

• Block explorer: https://explorer.decaf.testnet.espresso.network

• Public API endpoint: https://query.decaf.testnet.espresso.network

Contracts

Contract	Description	Network	Address
Light Client	Lets chains and apps read Espresso state in a trust-minimized way	Ethereum Sepolia	0x303872bb82a191771321d4828888920100d0b3e4
Stake Table	Manages validator registration and stake delegation	Ethereum Sepolia	0x40304fbe94d5e7d1492dd90c53a2d63e8506a037
ESP Token	ERC-20 token used for staking and protocol fees	Ethereum Sepolia	0xb3e655a030e2e34a18b72757b40be086a8f43f3b
Reward Claim	Distributes staking rewards to validators and delegators	Ethereum Sepolia	0xe81908e34dbb4ba01f27f8769264199727be50c8

Node Operators

Running a Decaf node. New Decaf operators are welcome. Decaf ESP is not publicly distributed, so ask the Espresso team for a delegation once your node is running. See Run a Validator Node.

For the container image tag, genesis file, environment variables, and commands needed to point a node at Decaf, see Run a Validator Node.

Protocol documentation

For protocol architecture, consensus design, smart contract specifications, and implementation details, see the espresso-network repository on GitHub.