Exposing fee estimates through RPC

251                UniValue failbucket(UniValue::VOBJ);
252                failbucket.pushKV("startrange", round(buckets.fail.start));
253                failbucket.pushKV("endrange", round(buckets.fail.end));
254                failbucket.pushKV("withintarget", round(buckets.fail.withinTarget * 100.0) / 100.0);
255                failbucket.pushKV("totalconfirmed", round(buckets.fail.totalConfirmed * 100.0) / 100.0);
256                failbucket.pushKV("inmempool", round(buckets.fail.inMempool * 100.0) / 100.0);
257                failbucket.pushKV("leftmempool", round(buckets.fail.leftMempool * 100.0) / 100.0);
258
259                // CFeeRate(0) is used to indicate error as a return value from estimateRawFee
260                if (feeRate != CFeeRate(0)) {
261                    horizon_result.pushKV("feerate", ValueFromAmount(feeRate.GetFeePerK()));
262                    horizon_result.pushKV("decay", buckets.decay);
263                    horizon_result.pushKV("scale", buckets.scale);
264                    horizon_result.pushKV("pass", std::move(passbucket));
265                    // buckets.fail.start == -1 indicates that all buckets passed, there is no fail bucket to output
266                    if (buckets.fail.start != -1) horizon_result.pushKV("fail", std::move(failbucket));
267                } else {
268                    // Output only information that is still meaningful in the event of error
269                    horizon_result.pushKV("decay", buckets.decay);
270                    horizon_result.pushKV("scale", buckets.scale);
271                    horizon_result.pushKV("fail", std::move(failbucket));
272                    errors.push_back("Insufficient data or no feerate found which meets threshold");
273                    horizon_result.pushKV("errors", std::move(errors));
274                }
275                result.pushKV(StringForFeeEstimateHorizon(horizon), std::move(horizon_result));
276            }
277            return result;
278        },
279    };
280}
281
282void RegisterFeeRPCCommands(CRPCTable& t)
283{
284    static const CRPCCommand commands[]{
285        {"util", &estimatesmartfee},
286        {"hidden", &estimaterawfee},
287    };
288    for (const auto& c : commands) {
289        t.appendCommand(c.name, &c);
290    }
291}
292