ba6c61bbdd
Introduce FeeRateEstimatorManager to wrap CBlockPolicyEstimator and act as the single point of contact for fee rate estimation in the node. It inherits CValidationInterface so it can register directly with the validation signals and receive mempool/block events. Wire it into NodeContext (fee_estimator_man), init, shutdown, the RPC server utility helpers (EnsureAnyFeeEstimatorMan), and the wallet-facing interfaces::Chain API. The Chain method estimateSmartFee is renamed to getFeeRateEstimate and now returns util::Expected<FeeRateEstimation, FeeRateEstimationError> instead of CFeeRate, so callers get the full estimation context without needing FeeCalculation. estimateMaxBlocks is renamed to maximumFeeEstimationTargetBlocks (still returns the max target). CBlockPolicyEstimator no longer inherits CValidationInterface; the manager now receives the mempool/block validation events and forwards them to the CBlockPolicyEstimator. Co-authored-by: willcl-ark <will@256k1.dev>
src/node/
The src/node/ directory contains code that needs to access node state
(state in CChain, CBlockIndex, CCoinsView, CTxMemPool, and similar
classes).
Code in src/node/ is meant to be segregated from code in
src/wallet/ and src/qt/, to ensure wallet and GUI
code changes don't interfere with node operation, to allow wallet and GUI code
to run in separate processes, and to perhaps eventually allow wallet and GUI
code to be maintained in separate source repositories.
As a rule of thumb, code in one of the src/node/,
src/wallet/, or src/qt/ directories should avoid
calling code in the other directories directly, and only invoke it indirectly
through the more limited src/interfaces/ classes.
This directory is at the moment
sparsely populated. Eventually more substantial files like
src/validation.cpp and
src/txmempool.cpp might be moved there.