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Livepeer orchestrators require an Arbitrum One RPC endpoint to interact with the protocol — staking, reward calls, ticket redemption, and service registration all happen on Arbitrum. The endpoint is configured via the -ethUrl flag.

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Requirements

Your RPC endpoint must:
  • Connect to Arbitrum One (chain ID 42161 / 0xa4b1) — not Ethereum L1
  • Support standard JSON-RPC methods (eth_call, eth_sendRawTransaction, eth_getBlockByNumber, eth_getLogs)
  • Handle the request volume your orchestrator generates — active orchestrators with frequent reward calls and ticket redemptions may exceed free-tier limits

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Provider Options

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Configuration

Set the endpoint when starting your orchestrator: 
livepeer \
  -network arbitrum-one-mainnet \
  -ethUrl https://arb-mainnet.g.alchemy.com/v2/YOUR_API_KEY \
  -orchestrator \
  -transcoder \
  ...

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Verify Your Endpoint

Test that the endpoint is reachable and returns the correct chain ID: 
curl -X POST -H "Content-Type: application/json" \
  --data '{"jsonrpc":"2.0","method":"eth_chainId","params":[],"id":1}' \
  YOUR_ETH_URL
Expected response includes "result":"0xa4b1" (42161 in decimal = Arbitrum One).

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Common Issues

For detailed troubleshooting, see the FAQ.

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See Also

Arbitrum Exchanges

Contract Addresses

FAQ

Last modified on March 17, 2026