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Improved empty mempool as well as medium and low fee estimations.

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refs #65
This commit is contained in:
softsimon 2020-10-05 11:42:54 +07:00
parent 766bd0d1e0
commit 15bb5a966b
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GPG Key ID: 488D7DCFB5A430D7
2 changed files with 38 additions and 18 deletions
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24
backend/src/api/fee-api.ts
View File

@ -1,4 +1,5 @@
const config = require('../../mempool-config.json');
import { MempoolBlock } from '../interfaces';
import projectedBlocks from './mempool-blocks';
class FeeApi {
@ -8,6 +9,7 @@ class FeeApi {
public getRecommendedFee() {
const pBlocks = projectedBlocks.getMempoolBlocks();
if (!pBlocks.length) {
return {
'fastestFee': this.defaultFee,
@ -15,14 +17,10 @@ class FeeApi {
'hourFee': this.defaultFee,
};
}
let firstMedianFee = Math.ceil(pBlocks[0].medianFee);
if (pBlocks.length === 1 && pBlocks[0].blockVSize <= 500000) {
firstMedianFee = this.defaultFee;
}
const secondMedianFee = pBlocks[1] ? Math.ceil(pBlocks[1].medianFee) : this.defaultFee;
const thirdMedianFee = pBlocks[2] ? Math.ceil(pBlocks[2].medianFee) : this.defaultFee;
const firstMedianFee = this.optimizeMedianFee(pBlocks[0]);
const secondMedianFee = pBlocks[1] ? this.optimizeMedianFee(pBlocks[1], firstMedianFee) : this.defaultFee;
const thirdMedianFee = pBlocks[2] ? this.optimizeMedianFee(pBlocks[2], secondMedianFee) : this.defaultFee;
return {
'fastestFee': firstMedianFee,
@ -30,6 +28,18 @@ class FeeApi {
'hourFee': thirdMedianFee,
};
}
private optimizeMedianFee(pBlock: MempoolBlock, previousFee?: number): number {
const useFee = previousFee ? (pBlock.medianFee + previousFee / 2) : pBlock.medianFee;
if (pBlock.blockVSize <= 500000) {
return this.defaultFee;
}
if (pBlock.blockVSize <= 950000) {
const multiplier = (pBlock.blockVSize - 500000) / 500000;
return Math.max(Math.round(useFee * multiplier), this.defaultFee);
}
return Math.round(useFee);
}
}
export default new FeeApi();

32
frontend/src/app/components/fees-box/fees-box.component.ts
View File

@ -2,6 +2,7 @@ import { Component, OnInit, ChangeDetectionStrategy } from '@angular/core';
import { StateService } from 'src/app/services/state.service';
import { map, filter } from 'rxjs/operators';
import { merge, Observable } from 'rxjs';
import { MempoolBlock } from 'src/app/interfaces/websocket.interface';
interface FeeEstimations {
fastestFee: number;
@ -18,13 +19,14 @@ interface FeeEstimations {
export class FeesBoxComponent implements OnInit {
feeEstimations$: Observable<FeeEstimations>;
isLoadingWebSocket$: Observable<boolean>;
defaultFee: number;
constructor(
private stateService: StateService,
) { }
ngOnInit(): void {
const defaultFee = this.stateService.network === 'liquid' ? 0.1 : 1;
this.defaultFee = this.stateService.network === 'liquid' ? 0.1 : 1;
this.isLoadingWebSocket$ = this.stateService.isLoadingWebSocket$;
this.feeEstimations$ = this.stateService.mempoolBlocks$
@ -32,19 +34,15 @@ export class FeesBoxComponent implements OnInit {
map((pBlocks) => {
if (!pBlocks.length) {
return {
'fastestFee': defaultFee,
'halfHourFee': defaultFee,
'hourFee': defaultFee,
'fastestFee': this.defaultFee,
'halfHourFee': this.defaultFee,
'hourFee': this.defaultFee,
};
}
let firstMedianFee = Math.ceil(pBlocks[0].medianFee);
if (pBlocks.length === 1 && pBlocks[0].blockVSize <= 500000) {
firstMedianFee = defaultFee;
}
const secondMedianFee = pBlocks[1] ? Math.ceil(pBlocks[1].medianFee) : defaultFee;
const thirdMedianFee = pBlocks[2] ? Math.ceil(pBlocks[2].medianFee) : defaultFee;
const firstMedianFee = this.optimizeMedianFee(pBlocks[0]);
const secondMedianFee = pBlocks[1] ? this.optimizeMedianFee(pBlocks[1], firstMedianFee) : this.defaultFee;
const thirdMedianFee = pBlocks[2] ? this.optimizeMedianFee(pBlocks[2], secondMedianFee) : this.defaultFee;
return {
'fastestFee': firstMedianFee,
@ -55,4 +53,16 @@ export class FeesBoxComponent implements OnInit {
);
}
optimizeMedianFee(pBlock: MempoolBlock, previousFee?: number): number {
const useFee = previousFee ? (pBlock.medianFee + previousFee / 2) : pBlock.medianFee;
if (pBlock.blockVSize <= 500000) {
return this.defaultFee;
}
if (pBlock.blockVSize <= 950000) {
const multiplier = (pBlock.blockVSize - 500000) / 500000;
return Math.max(Math.round(useFee * multiplier), this.defaultFee);
}
return Math.round(useFee);
}
}