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Configure

Shiroi integration is configured via standard solana-validator flags.

All standard solana-validator parameters are supported. Shiroi introduces a minimal set of additional, optional flags that enable interaction with external block builders.

No protocol, consensus, or execution flags are modified.

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Required configuration

To enable external block building, the validator must be configured with a Block Builder endpoint.

Block builder endpoint

--block-builder-url <BBM_URL>

This flag specifies the URL of the external Block Builder Module (BBM) that provides ready-to-propose blocks.

The validator will attempt to fetch complete blocks from this endpoint during its proposer slots.

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Example invocation

./agave-validator \
  --block-builder-url https://bbm.shiroi.example \
  # ... all standard solana-validator configuration flags

All other validator configuration (identity, ledger, voting, networking, RPC, etc.) remains unchanged.

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Optional behavior

If the block builder is unavailable or fails to deliver a valid block:

  • the validator continues operating normally

  • standard block production behavior applies

  • no liveness dependency on BBM is introduced

Integration with Shiroi is additive and fail-safe.

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