113 lines
4.5 KiB
TypeScript
113 lines
4.5 KiB
TypeScript
import { Component, ChangeDetectionStrategy, Input, OnChanges } from '@angular/core';
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import { Vin, Vout } from '../../interfaces/electrs.interface';
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import { StateService } from '../../services/state.service';
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import { parseMultisigScript } from '../../bitcoin.utils';
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@Component({
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selector: 'app-address-labels',
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templateUrl: './address-labels.component.html',
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styleUrls: ['./address-labels.component.scss'],
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changeDetection: ChangeDetectionStrategy.OnPush,
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})
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export class AddressLabelsComponent implements OnChanges {
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network = '';
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@Input() vin: Vin;
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@Input() vout: Vout;
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@Input() channel: any;
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label?: string;
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constructor(
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stateService: StateService,
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) {
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this.network = stateService.network;
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}
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ngOnChanges() {
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if (this.channel) {
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this.handleChannel();
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} else if (this.vin) {
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this.handleVin();
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} else if (this.vout) {
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this.handleVout();
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}
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}
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handleChannel() {
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const type = this.vout ? 'open' : 'close';
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this.label = `Channel ${type}: ${this.channel.node_left.alias} <> ${this.channel.node_right.alias}`;
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}
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handleVin() {
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if (this.vin.inner_witnessscript_asm) {
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if (this.vin.inner_witnessscript_asm.indexOf('OP_DEPTH OP_PUSHNUM_12 OP_EQUAL OP_IF OP_PUSHNUM_11') === 0) {
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if (this.vin.witness.length > 11) {
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this.label = 'Liquid Peg Out';
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} else {
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this.label = 'Emergency Liquid Peg Out';
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}
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return;
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}
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const topElement = this.vin.witness[this.vin.witness.length - 2];
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if (/^OP_IF OP_PUSHBYTES_33 \w{66} OP_ELSE OP_PUSH(NUM_\d+|BYTES_(1 \w{2}|2 \w{4})) OP_CSV OP_DROP OP_PUSHBYTES_33 \w{66} OP_ENDIF OP_CHECKSIG$/.test(this.vin.inner_witnessscript_asm)) {
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// https://github.com/lightning/bolts/blob/master/03-transactions.md#commitment-transaction-outputs
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if (topElement === '01') {
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// top element is '01' to get in the revocation path
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this.label = 'Revoked Lightning Force Close';
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} else {
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// top element is '', this is a delayed to_local output
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this.label = 'Lightning Force Close';
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}
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return;
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} else if (
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/^OP_DUP OP_HASH160 OP_PUSHBYTES_20 \w{40} OP_EQUAL OP_IF OP_CHECKSIG OP_ELSE OP_PUSHBYTES_33 \w{66} OP_SWAP OP_SIZE OP_PUSHBYTES_1 20 OP_EQUAL OP_NOTIF OP_DROP OP_PUSHNUM_2 OP_SWAP OP_PUSHBYTES_33 \w{66} OP_PUSHNUM_2 OP_CHECKMULTISIG OP_ELSE OP_HASH160 OP_PUSHBYTES_20 \w{40} OP_EQUALVERIFY OP_CHECKSIG OP_ENDIF (OP_PUSHNUM_1 OP_CSV OP_DROP |)OP_ENDIF$/.test(this.vin.inner_witnessscript_asm) ||
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/^OP_DUP OP_HASH160 OP_PUSHBYTES_20 \w{40} OP_EQUAL OP_IF OP_CHECKSIG OP_ELSE OP_PUSHBYTES_33 \w{66} OP_SWAP OP_SIZE OP_PUSHBYTES_1 20 OP_EQUAL OP_IF OP_HASH160 OP_PUSHBYTES_20 \w{40} OP_EQUALVERIFY OP_PUSHNUM_2 OP_SWAP OP_PUSHBYTES_33 \w{66} OP_PUSHNUM_2 OP_CHECKMULTISIG OP_ELSE OP_DROP OP_PUSHBYTES_3 \w{6} OP_CLTV OP_DROP OP_CHECKSIG OP_ENDIF (OP_PUSHNUM_1 OP_CSV OP_DROP |)OP_ENDIF$/.test(this.vin.inner_witnessscript_asm)
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) {
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// https://github.com/lightning/bolts/blob/master/03-transactions.md#offered-htlc-outputs
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// https://github.com/lightning/bolts/blob/master/03-transactions.md#received-htlc-outputs
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if (topElement.length === 66) {
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// top element is a public key
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this.label = 'Revoked Lightning HTLC';
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} else if (topElement) {
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// top element is a preimage
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this.label = 'Lightning HTLC';
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} else {
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// top element is '' to get in the expiry of the script
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this.label = 'Expired Lightning HTLC';
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}
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return;
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} else if (/^OP_PUSHBYTES_33 \w{66} OP_CHECKSIG OP_IFDUP OP_NOTIF OP_PUSHNUM_16 OP_CSV OP_ENDIF$/.test(this.vin.inner_witnessscript_asm)) {
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// https://github.com/lightning/bolts/blob/master/03-transactions.md#to_local_anchor-and-to_remote_anchor-output-option_anchors
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if (topElement) {
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// top element is a signature
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this.label = 'Lightning Anchor';
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} else {
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// top element is '', it has been swept after 16 blocks
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this.label = 'Swept Lightning Anchor';
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}
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return;
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}
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this.detectMultisig(this.vin.inner_witnessscript_asm);
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}
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this.detectMultisig(this.vin.inner_redeemscript_asm);
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this.detectMultisig(this.vin.prevout.scriptpubkey_asm);
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}
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detectMultisig(script: string) {
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const ms = parseMultisigScript(script);
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if (ms) {
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this.label = $localize`:@@address-label.multisig:Multisig ${ms.m}:multisigM: of ${ms.n}:multisigN:`;
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}
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}
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handleVout() {
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this.detectMultisig(this.vout.scriptpubkey_asm);
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}
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}
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