Preconfirmations
bloXroute now supports pre-confirmation solutions for both Primev and Chainbound. Below is an overview of how our integration works.
Primev Integration
About Primev
Primev is an infrastructure provider offering pre-confirmation capabilities on Ethereum. They operate a custom chain alongside a set of Ethereum smart contracts to coordinate builder and validator participation in their preconf ecosystem.
Our Integration
Validator Tracking (Ethereum Mainnet)
We reference Primev’s validator opt-in contract on Ethereum Mainnet:
0x821798d7b9d57dF7Ed7616ef9111A616aB19ed64A helper function is used to query validator participation status.
This contract maintains a list of validators who have opted into Primev’s pre-confirmation program.
Builder Tracking (Primev Custom Chain)
Primev maintains a contract on their own chain to track builder opt-in status:
0xb772Add4718E5BD6Fe57Fb486A6f7f008E52167EBuilders are mapped to externally owned accounts (EOAs) via a helper function that converts their public key to an address.
We query this contract through their public RPC endpoint:
wss://chainrpc-wss.mev-commit.xyz
Validation Checks
Once per epoch, we validate the opt-in status of all known validators and builders.
This polling-based model ensures data consistency without requiring persistent event listeners.
Chainbound Integration
About Chainbound
Chainbound is another provider building a pre-confirmation solution for Ethereum, called Commit-Boost. Their focus is on enabling block builders to provide pre-confirmations directly to searchers and users, without requiring validator coordination. Chainbound’s architecture is designed to integrate seamlessly with builder workflows, offering lighter-weight guarantees and flexible integration points.
Our Integration
We’ve added support for Chainbound’s Commit-Boost protocol within our pre-confirmation infrastructure. It allows validators to manage proposer commitments—such as pre-confirmations—using a modular and extensible framework, without requiring coordination with external contracts or RPC endpoints.
Commit-Boost is designed to:
Run as a sidecar next to MEV-Boost or without.
Provide a unified platform for validator commitments (e.g., inclusion guarantees, blockspace futures).
Be extensible via plug-and-play modules.
Avoid fragmentation or duplicated infrastructure.
Technical References
Primev:
RPC endpoint:
wss://chainrpc-wss.mev-commit.xyzValidator opt-in contract:
0x821798d7b9d57dF7Ed7616ef9111A616aB19ed64Builder opt-in contract (Primev chain):
0xb772Add4718E5BD6Fe57Fb486A6f7f008E52167E
Chainbound:
No RPC endpoint or smart contract required.
Uses Commit-Boost sidecar alongside or independent off MEV-Boost.
If you're a builder and would like to begin submitting pre-confirmations via bloXroute’s infrastructure, reach out to [email protected] for integration support, specs, and test endpoints.
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