ismaelsadeeq 970f02096d fees: persist mempool policy estimator data ...

Persist MemPoolFeeRateEstimator's recent mined-block statistics
to fees/mempool_policy_estimator.dat and reload them at startup.

Without this, the mempool estimator starts cold after each restart
and treats the mempool as unhealthy until MEMPOOL_HEALTH_WINDOW_BLOCKS
blocks have been observed, causing the default combined estimatesmartfee
request to return a mempool fee rate estimator error.

Files with more stats than MEMPOOL_HEALTH_WINDOW_BLOCKS,
non-consecutive block heights, or a final block that does not match the
active chain tip are rejected on read, preserving the invariant that
loaded stats describe the current chain.

Add MempoolPolicyEstimatorPath(), pass the path through
FeeRateEstimatorManager, and flush both block-policy
and mempool-policy estimator files on interval and shutdown.

2026-08-20 16:37:31 +01:00

34 KiB

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