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release-notes-34568.md

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Mining IPC

The IPC mining interface now requires mining clients to use the latest mining.capnp schema. Clients built against older schemas will fail when calling Init.makeMining and receive an RPC error indicating the old mining interface is no longer supported. Mining clients must update to the latest schema and regenerate bindings to continue working. (#34568)

Notable IPC mining interface changes since the last release:

  • Mining.createNewBlock and Mining.checkBlock now require a context parameter.
  • Mining.waitTipChanged now has a default timeout (effectively infinite / maxDouble) if the client omits it.
  • BlockTemplate.getCoinbaseTx() now returns a structured CoinbaseTx instead of raw bytes.
  • Removed BlockTemplate.getCoinbaseCommitment() and BlockTemplate.getWitnessCommitmentIndex().
  • Cap’n Proto default values were updated to match the corresponding C++ defaults for mining-related option structs (e.g. BlockCreateOptions, BlockWaitOptions, BlockCheckOptions).