display channel close forensics results

frontend/src/app/interfaces/node-api.interface.ts

@@ -217,8 +217,8 @@ export interface IChannel {
   updated_at: string;
   created: string;
   status: number;
-  node_left: Node,
+  node_left: INode,
-  node_right: Node,
+  node_right: INode,
 }
 
 
@@ -236,4 +236,6 @@ export interface INode {
   updated_at: string;
   longitude: number;
   latitude: number;
+  funding_balance?: number;
+  closing_balance?: number;
 }

frontend/src/app/lightning/channel/channel-close-box/channel-close-box.component.html

@@ -0,0 +1,19 @@
+<div class="box">
+  <table class="table table-borderless table-striped">
+    <tbody>
+      <tr></tr>
+      <tr>
+        <td i18n="lightning.starting-balance|Channel starting balance">Starting balance</td>
+        <td *ngIf="showStartingBalance && minStartingBalance === maxStartingBalance"><app-sats [satoshis]="minStartingBalance"></app-sats></td>
+        <td *ngIf="showStartingBalance && minStartingBalance !== maxStartingBalance">{{ minStartingBalance | number : '1.0-0' }} - {{ maxStartingBalance | number : '1.0-0' }}<app-sats [valueOverride]=" "></app-sats></td>
+        <td *ngIf="!showStartingBalance">?</td>
+      </tr>
+      <tr>
+        <td i18n="lightning.closing-balance|Channel closing balance">Closing balance</td>
+        <td *ngIf="showClosingBalance && minClosingBalance === maxClosingBalance"><app-sats [satoshis]="minClosingBalance"></app-sats></td>
+        <td *ngIf="showClosingBalance && minClosingBalance !== maxClosingBalance">{{ minClosingBalance | number : '1.0-0' }} - {{ maxClosingBalance | number : '1.0-0' }}<app-sats [valueOverride]=" "></app-sats></td>
+        <td *ngIf="!showClosingBalance">?</td>
+      </tr>
+    </tbody>
+  </table>
+</div>

frontend/src/app/lightning/channel/channel-close-box/channel-close-box.component.scss

@@ -0,0 +1,9 @@
+.box {
+  margin-top: 20px;
+}
+
+@media (max-width: 768px) {
+  .box {
+    margin-bottom: 20px;
+  }
+}

frontend/src/app/lightning/channel/channel-close-box/channel-close-box.component.spec.ts

@@ -0,0 +1,25 @@
+import { ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { ChannelCloseBoxComponent } from './channel-close-box.component';
+
+describe('ChannelCloseBoxComponent', () => {
+  let component: ChannelCloseBoxComponent;
+  let fixture: ComponentFixture<ChannelCloseBoxComponent>;
+
+  beforeEach(async () => {
+    await TestBed.configureTestingModule({
+      declarations: [ ChannelCloseBoxComponent ]
+    })
+    .compileComponents();
+  });
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(ChannelCloseBoxComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

frontend/src/app/lightning/channel/channel-close-box/channel-close-box.component.ts

@@ -0,0 +1,58 @@
+import { ChangeDetectionStrategy, Component, Input, OnChanges, SimpleChanges } from '@angular/core';
+
+@Component({
+  selector: 'app-channel-close-box',
+  templateUrl: './channel-close-box.component.html',
+  styleUrls: ['./channel-close-box.component.scss'],
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class ChannelCloseBoxComponent implements OnChanges {
+  @Input() channel: any;
+  @Input() local: any;
+  @Input() remote: any;
+
+  showStartingBalance: boolean = false;
+  showClosingBalance: boolean = false;
+  minStartingBalance: number;
+  maxStartingBalance: number;
+  minClosingBalance: number;
+  maxClosingBalance: number;
+
+  constructor() { }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    if (this.channel && this.local && this.remote) {
+      this.showStartingBalance = (this.local.funding_balance || this.remote.funding_balance) && this.channel.funding_ratio;
+      this.showClosingBalance = this.local.closing_balance || this.remote.closing_balance;
+
+      if (this.channel.single_funded) {
+        if (this.local.funding_balance) {
+          this.minStartingBalance = this.channel.capacity;
+          this.maxStartingBalance = this.channel.capacity;
+        } else if (this.remote.funding_balance) {
+          this.minStartingBalance = 0;
+          this.maxStartingBalance = 0;
+        }
+      } else {
+        this.minStartingBalance = clampRound(0, this.channel.capacity, this.local.funding_balance * this.channel.funding_ratio);
+        this.maxStartingBalance = clampRound(0, this.channel.capacity, this.channel.capacity - (this.remote.funding_balance * this.channel.funding_ratio));
+      }
+
+      const closingCapacity = this.channel.capacity - this.channel.closing_fee;
+      this.minClosingBalance = clampRound(0, closingCapacity, this.local.closing_balance);
+      this.maxClosingBalance = clampRound(0, closingCapacity, closingCapacity - this.remote.closing_balance);
+
+      // margin of error to account for 2 x 330 sat anchor outputs
+      if (Math.abs(this.minClosingBalance - this.maxClosingBalance) <= 660) {
+        this.maxClosingBalance = this.minClosingBalance;
+      }
+    } else {
+      this.showStartingBalance = false;
+      this.showClosingBalance = false;
+    }
+  }
+}
+
+function clampRound(min: number, max: number, value: number): number {
+  return Math.max(0, Math.min(max, Math.round(value)));
+}

frontend/src/app/lightning/channel/channel.component.html

@@ -48,6 +48,15 @@
                 <td i18n="lightning.capacity">Capacity</td>
                 <td><app-sats [satoshis]="channel.capacity"></app-sats><app-fiat [value]="channel.capacity" digitsInfo="1.0-0"></app-fiat></td>
               </tr>
+              <tr *ngIf="channel.closed_by">
+                <td i18n="lightning.closed_by">Closed by</td>
+                <td>
+                  <a [routerLink]="['/lightning/node' | relativeUrl, channel.closed_by]" >
+                    <ng-container *ngIf="channel.closed_by === channel.node_left.public_key">{{ channel.node_left.alias }}</ng-container>
+                    <ng-container *ngIf="channel.closed_by === channel.node_right.public_key">{{ channel.node_right.alias }}</ng-container>
+                  </a>
+                </td>
+              </tr>
             </tbody>
           </table>
         </div>
@@ -59,9 +68,11 @@
   <div class="row row-cols-1 row-cols-md-2">
     <div class="col">
       <app-channel-box [channel]="channel.node_left"></app-channel-box>
+      <app-channel-close-box *ngIf="showCloseBoxes(channel)" [channel]="channel" [local]="channel.node_left" [remote]="channel.node_right"></app-channel-close-box>
     </div>
     <div class="col">
       <app-channel-box [channel]="channel.node_right"></app-channel-box>
+      <app-channel-close-box *ngIf="showCloseBoxes(channel)" [channel]="channel" [local]="channel.node_right" [remote]="channel.node_left"></app-channel-close-box>
     </div>
   </div>
 

frontend/src/app/lightning/channel/channel.component.ts

@@ -78,4 +78,9 @@ export class ChannelComponent implements OnInit {
     );
   }
 
+  showCloseBoxes(channel: IChannel): boolean {
+    return !!(channel.node_left.funding_balance || channel.node_left.closing_balance 
+      || channel.node_right.funding_balance || channel.node_right.closing_balance);
+  }
+
 }

frontend/src/app/lightning/lightning.module.ts

@@ -12,6 +12,7 @@ import { ChannelsListComponent } from './channels-list/channels-list.component';
 import { ChannelComponent } from './channel/channel.component';
 import { LightningWrapperComponent } from './lightning-wrapper/lightning-wrapper.component';
 import { ChannelBoxComponent } from './channel/channel-box/channel-box.component';
+import { ChannelCloseBoxComponent } from './channel/channel-close-box/channel-close-box.component';
 import { ClosingTypeComponent } from './channel/closing-type/closing-type.component';
 import { LightningStatisticsChartComponent } from './statistics-chart/lightning-statistics-chart.component';
 import { NodeStatisticsChartComponent } from './node-statistics-chart/node-statistics-chart.component';
@@ -45,6 +46,7 @@ import { GroupComponent } from './group/group.component';
     ChannelComponent,
     LightningWrapperComponent,
     ChannelBoxComponent,
+    ChannelCloseBoxComponent,
     ClosingTypeComponent,
     LightningStatisticsChartComponent,
     NodesNetworksChartComponent,
@@ -81,6 +83,7 @@ import { GroupComponent } from './group/group.component';
     ChannelComponent,
     LightningWrapperComponent,
     ChannelBoxComponent,
+    ChannelCloseBoxComponent,
     ClosingTypeComponent,
     LightningStatisticsChartComponent,
     NodesNetworksChartComponent,