time the rolling minimum fee rate was last decayed
Declared in <txmempool.h>
[[guarded_by(0x7fb95f554a48), guarded_by(0x7fb968bc6158), guarded_by(0x7fb95fdcff98), guarded_by(0x7fb978b75358), guarded_by(0x7fb96b8fa8b8), guarded_by(0x7fb96e5c1388), guarded_by(0x7fb97a07b3b8), guarded_by(0x7fb96be43108)]]
mutable
int64_t lastRollingFeeUpdate = {GetTime()};