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Merge pull request #4556 from mempool/mononaut/smooth-mempool-blocks

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Smooth out irregular mempool block updates
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softsimon 2024-01-09 11:16:25 +07:00 • committed by GitHub
commit f9dfb3b2b1
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2 changed files with 41 additions and 13 deletions
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2
frontend/src/app/components/block-overview-graph/block-scene.ts
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@ -11,7 +11,7 @@ export default class BlockScene {
getColor: ((tx: TxView) => Color) = defaultColorFunction;
orientation: string;
flip: boolean;
animationDuration: number = 1000;
animationDuration: number = 900;
configAnimationOffset: number | null;
animationOffset: number;
highlightingEnabled: boolean;

52
frontend/src/app/components/mempool-block-overview/mempool-block-overview.component.ts
View file

@ -3,8 +3,8 @@ import { Component, ComponentRef, ViewChild, HostListener, Input, Output, EventE
import { StateService } from '../../services/state.service';
import { MempoolBlockDelta, TransactionStripped } from '../../interfaces/websocket.interface';
import { BlockOverviewGraphComponent } from '../../components/block-overview-graph/block-overview-graph.component';
import { Subscription, BehaviorSubject, merge, of } from 'rxjs';
import { switchMap, filter } from 'rxjs/operators';
import { Subscription, BehaviorSubject, merge, of, timer } from 'rxjs';
import { switchMap, filter, concatMap, map } from 'rxjs/operators';
import { WebsocketService } from '../../services/websocket.service';
import { RelativeUrlPipe } from '../../shared/pipes/relative-url/relative-url.pipe';
import { Router } from '@angular/router';
@ -33,7 +33,9 @@ export class MempoolBlockOverviewComponent implements OnInit, OnDestroy, OnChang
poolDirection: string = 'left';
blockSub: Subscription;
deltaSub: Subscription;
rateLimit = 1000;
private lastEventTime = Date.now() - this.rateLimit;
private subId = 0;
firstLoad: boolean = true;
@ -55,11 +57,39 @@ export class MempoolBlockOverviewComponent implements OnInit, OnDestroy, OnChang
ngAfterViewInit(): void {
this.blockSub = merge(
of(true),
this.stateService.connectionState$.pipe(filter((state) => state === 2))
)
.pipe(switchMap(() => this.stateService.mempoolBlockTransactions$))
.subscribe((transactionsStripped) => {
this.stateService.mempoolBlockTransactions$,
this.stateService.mempoolBlockDelta$,
).pipe(
concatMap(update => {
const now = Date.now();
const timeSinceLastEvent = now - this.lastEventTime;
this.lastEventTime = Math.max(now, this.lastEventTime + this.rateLimit);
const subId = this.subId;
// If time since last event is less than X seconds, delay this event
if (timeSinceLastEvent < this.rateLimit) {
return timer(this.rateLimit - timeSinceLastEvent).pipe(
// Emit the event after the timer
map(() => ({ update, subId }))
);
} else {
// If enough time has passed, emit the event immediately
return of({ update, subId });
}
})
).subscribe(({ update, subId }) => {
// discard stale updates after a block transition
if (subId !== this.subId) {
return;
}
// process update
if (update['added']) {
// delta
this.updateBlock(update as MempoolBlockDelta);
} else {
const transactionsStripped = update as TransactionStripped[];
// new transactions
if (this.firstLoad) {
this.replaceBlock(transactionsStripped);
} else {
@ -94,14 +124,13 @@ export class MempoolBlockOverviewComponent implements OnInit, OnDestroy, OnChang
added
});
}
});
this.deltaSub = this.stateService.mempoolBlockDelta$.subscribe((delta) => {
this.updateBlock(delta);
}
});
}
ngOnChanges(changes): void {
if (changes.index) {
this.subId++;
this.firstLoad = true;
if (this.blockGraph) {
this.blockGraph.clear(changes.index.currentValue > changes.index.previousValue ? this.chainDirection : this.poolDirection);
@ -113,7 +142,6 @@ export class MempoolBlockOverviewComponent implements OnInit, OnDestroy, OnChang
ngOnDestroy(): void {
this.blockSub.unsubscribe();
this.deltaSub.unsubscribe();
this.timeLtrSubscription.unsubscribe();
this.websocketService.stopTrackMempoolBlock();
}