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HDP reads runtime configuration from environment variables.
The CLI loads .env automatically.

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RPC endpoints

RPC_URL_ETHEREUM_MAINNET=
RPC_URL_ETHEREUM_TESTNET=
RPC_URL_OPTIMISM_MAINNET=
RPC_URL_OPTIMISM_TESTNET=
RPC_URL_STARKNET_MAINNET=
RPC_URL_STARKNET_TESTNET=
RPC_URL_HERODOTUS_INDEXER=https://rs-indexer.api.herodotus.cloud/
RPC_URL_HERODOTUS_INDEXER points to the Herodotus Indexer, used for header commitment proof retrieval.

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Injected state

INJECTED_STATE_BASE_URL=http://localhost:3000
Set this explicitly when using injected state. See injected-state flow details in State management and State Server.

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Validate environment for a run

hdp env-check --inputs dry_run_output.json
This checks only the RPC endpoints required by the specific key set in that dry-run output.

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Logging

Use either:
  • --log-level <LEVEL> / --debug
  • RUST_LOG=<LEVEL>

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Advanced

  • HDP_SOUND_RUN_PATH - override compiled sound-run program path