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Fix viem and ethers RPC Errors: Rate Limits, Wrong Chain and Missing Response

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On-chain & DeFi intermediate 7 min read $0.01 Updated 2026-10-19

Troubleshooting EVM RPC clients: rate limiting and 429 retry, multiple endpoints and fallback transports, eth_getLogs range limits, chain id mismatch, stale blocks and lagging nodes, batching and multicall, websockets, and archive vs full node.

Your dapp or bot gets 429s, "missing response", "header not found" or stale data from an RPC. Add retries and fallbacks, batch calls, respect log range limits and verify the chain id.

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#viem#ethers#rpc#evm#rate-limit

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