proxyd

proxyd is an RPC proxy

• https://github.com/ethereum-optimism/optimism/tree/develop/proxyd

Features:

• Whitelists RPC methods
• Routes RPC methods to groups of backend services
• Load balance requests across backend services
• Automatically retries failed backend requests
• Cache immutable responses from backends
• Provides metrics to measure request latency, error rates, and the like

Consensus related:

• Track backend consensus (latest, safe, finalized blocks), peer count and sync state
• Re-write requests and responses to enforce consensus

Related

• Consensus
• Emerald Dshackle load balancer

See also

• OP Stack: op-, op-geth, op-node, op-proposer, op-batcher, op-contracts, op-challenger, op-heartbeat, op-ufm, op-service, op-deployer, Snap Sync, op-conductor, op-dispute-mon
• Optimism, OP, OP Stack, OP Architecture, op-, Superchain, Optimism Bedrock, Proxyd, Crypto sequencer, rollup, Optimistic Rollup Protocol, Optimism Blobs, Optimism monitorism, fault-mon, eth-optimism/sdk, L2OutputOracle.sol, OptimismPortal.sol, OP Sepolia Testnet (11155420), OP Labs, Optimism Foundation, Fault Proof, Ecotone, Fjord, Rollup node, L2 Chain Derivation Specification, Fastnode.io, OP Contracts Manager (OPCM)