Horizon Mainnet Upgrade Window Is Now Open
Hey @Indexers. Horizon Mainnet is close to launching. The upgrade window for Indexers is now open and all Indexers must upgrade their stack to participate in Horizon’s upcoming multi-service architecture.
Horizon will introduce data service-specific staking, longer-lived allocations, and the foundation for new data services running on The Graph’s decentralized network. Upgrading early helps ensure smooth participation once Horizon fully activates, currently scheduled to go live in mid-December.
Indexer action required: Indexers should begin the upgrade process by following the “Upgrade Procedures” in the [Horizon Indexer Stack Upgrade Guide](https://thegraph.com/docs/en/graph-horizon/migration-guide/):
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Horizon context and timeline
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Upgrade `indexer-agent`
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Upgrade `indexer-service` and `tap-agent`
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Managing Subgraph Service provisions
It is recommended Indexers pre-sync the temporary Horizon Network Subgraph: Graph Network Arbitrum - Horizon Temp | Graph Explorer
If any issues arise during the upgrade, please notify the Horizon team. Feedback is welcome throughout this upgrade period.
Thank you for your continued support as Horizon moves to mainnet.