transaction charges – What’s the FeeReason enumeration within the Bitcoin Core?

It’s used to report again to callers into the price estimation capabilities to be taught why the returned feerate was chosen. Descriptions for these causes are:

static const std::map<FeeReason, std::string> fee_reason_strings = {
    {FeeReason::NONE, "None"},
    {FeeReason::HALF_ESTIMATE, "Half Goal 60% Threshold"},
    {FeeReason::FULL_ESTIMATE, "Goal 85% Threshold"},
    {FeeReason::DOUBLE_ESTIMATE, "Double Goal 95% Threshold"},
    {FeeReason::CONSERVATIVE, "Conservative Double Goal longer horizon"},
    {FeeReason::MEMPOOL_MIN, "Mempool Min Charge"},
    {FeeReason::PAYTXFEE, "PayTxFee set"},
    {FeeReason::FALLBACK, "Fallback price"},
    {FeeReason::REQUIRED, "Minimal Required Charge"},
};