Jello Upgrade
Table of Contents
Overview
The Jello upgrade for the Celo network enables OP Succinct Lite, a production-ready, zero-knowledge-powered fault proof system built in collaboration with OP Labs and Succinct.
Specifications
L1 Contract changes
The Jello upgrade included L1 contract changes. They have been been accepted by governance in CGP-265 and executed by the Celo Security Council.
Execution Layer changes
There's no execution layer changes in the Jello upgrade.
Upgrade Timelines
The Jello upgrade activated on Mainnet and Celo Sepolia, with the activation process for each network occurring independently.
| Network | Date & Time (UTC) | Upgrade transaction |
|---|---|---|
| Celo Sepolia | Wed, Nov 05 2025 11:16:00 | https://eth-sepolia.blockscout.com/tx/0x736deb757f4708eeafecc961f36e14f3711c1d9f944e45c933b666329743b31a |
| Mainnet | Wed, Dec 10 2025 10:24:22 | https://eth.blockscout.com/tx/0x5fb3f2225dd2ba91efe941d4c9151df120ab06f6611b7b494bdecc96ff84c44b |