Cronos zkEVM Testnet To Be Reset on October 21, 2024

Developer announcement

In order to ensure long term consistency between Cronos zkEVM Mainnet and Testnet, the Cronos zkEVM Testnet will be reset and rebooted on October 21, as already announced in the developer channels.

This change will not impact end-users or their funds, since those are on Mainnet.

If you are a developer using the Testnet on a regular basis, please read below.

TLDR:

• The new Testnet will start from scratch, no existing state will be carried over;

• The new Testnet will have a new chain ID 240 (different from the current one: 282);

• Endpoints and services will be switched to the new Testnet on Oct 21, 2024;

• The Cronos zkEVM documentation will be updated accordingly.

Why is this happening?

• The ZKsync code base used by Cronos zkEVM has undergone several major upgrades in 2024. While Cronos zkEVM Mainnet is up to date, the Testnet is based on a slightly older version. The best way to ensure full consistency between Mainnet and Testnet is to reset the Testnet.

• This upgrade will benefit developers, who will now be able to rely on consistent release sequences starting with Testnet and then Mainnet.

What will happen and when?

On Oct 21, a brand new Testnet will be deployed with Chain ID 240, and the following services will be transitioned to the new testnet:

• Cronos zkEVM testnet public endpoints

  • Testnet JSON RPC: https://testnet.zkevm.cronos.org;

  • Testnet WebSocket: wss://ws.testnet.zkevm.cronos.org;

• Cronos zkEVM testnet Developers Portal APIs: https://explorer-api.testnet.zkevm.cronos.org/api/;

• Cronos zkEVM testnet blockchain explorer;

• GoldSky Cronos zkEVM testnet subgraph services;

• Cronos zkEVM testnet Bridge UI;

• => If you are using MetaMask with the Testnet, you will need to delete the Cronos zkEVM Testnet network and configure it again with the new Chain ID (instructions will be provided in the Cronos zkEVM docs).

• => Real-time updates will be provided in the developer channel on Discord (dev-cronos-zkevm)

During the grace period between Oct 21 and Nov 4, the "old" Testnet (Chain ID 282) will remain available at the following URLs:

• [JSON RPC] testnet.zkevm.cronos.org -> deprecated.testnet.zkevm.cronos.org

• [Websocket] ws.testnet.zkevm.cronos.org -> deprecated-ws.testnet.zkevm.cronos.org

• [Seed] seed.testnet.zkevm.cronos.org -> deprecated-seed.testnet.zkevm.cronos.org

On Nov 4, the "old" Testnet will be discontinued completely.

• testnet (Chain ID:282) and deprecated.testnet.* endpoints will be completely discontinued.