> ## Documentation Index
> Fetch the complete documentation index at: https://docs.celo.org/llms.txt
> Use this file to discover all available pages before exploring further.

# End of Support for op-geth

> Celo replaced op-geth with op-reth as its supported execution client; migrate any node still running op-geth

This notice is for node operators, RPC providers, and bridge operators. Following [Optimism's](https://docs.optimism.io/notices/op-geth-deprecation) deprecation of `op-geth`, Celo replaced `op-geth` with `op-reth` as its supported execution client. A node still running `op-geth` can follow the wrong chain and must migrate to `op-reth`.

## Switch dates

Support for `op-geth` ended on these dates:

* **Celo Sepolia**: June 24, 2026
* **Mainnet**: July 22, 2026

## Summary of changes

* **`op-geth`**: No longer supported on either network. A node still running it can follow the wrong chain.
* **`op-reth`**: The supported execution client, built on `reth`.
* **`op-node`**: No changes. It remains fully supported.

## Requirements for node operators

If your node still runs `op-geth`, migrate it to `op-reth`. A Celo-compatible `op-reth` release is available, and the node-operator guides use it:

* Follow [Run a node with Docker](/operate/operators/run-node) to run `op-reth`. A new node starts from an empty datadir — bootstrap it from a published snapshot (`OP_RETH__SNAPSHOT=true`, required on mainnet) or, on Celo Sepolia, sync from genesis; no L1 data migration is required.
* To switch an existing mainnet node, [RETH\_MIGRATION.md](https://github.com/celo-org/celo-l2-node-docker-compose/blob/main/RETH_MIGRATION.md) in the compose repository walks through running `op-reth` in parallel with `op-geth`, adding `--l2.enginekind=reth` to `op-node`, and cutting traffic over once `op-reth` reaches the tip.
* A migrated `op-geth` datadir cannot be reused — `op-reth` uses a different on-disk format. Start `op-reth` with an empty `DATADIR_PATH`.
* For archive nodes and pre-L2 historical state, see [Running an archive node](/operate/operators/archive-node).
* See the [Configuration reference](/operate/operators/configuration) for the `OP_RETH__*` variables, and the [celo-l2-node-docker-compose](https://github.com/celo-org/celo-l2-node-docker-compose) repository for the latest images.

## RPC providers and bridge operators

`op-reth` supports the same JSON-RPC interface as `op-geth`, so most RPC users need no changes. Non-standard and debug RPC methods can differ. If your integration uses them, test it against an `op-reth` node on Celo Sepolia before relying on it on mainnet.

## Resources

| Resource | Link |
| - | - |
| Optimism op-geth deprecation notice | [docs.optimism.io](https://docs.optimism.io/notices/op-geth-deprecation) |
| Celo node Docker setup | [celo-l2-node-docker-compose](https://github.com/celo-org/celo-l2-node-docker-compose) |


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