From 12285465d9ea3a034f6b054a158cf63e9ebbd2ce Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Fri, 30 Aug 2024 21:39:22 +0000
Subject: [PATCH] Add support for anchor output type

---
 backend/src/api/bitcoin/bitcoin-api.ts                |  1 +
 .../address-labels/address-labels.component.ts        |  2 +-
 frontend/src/app/shared/address-utils.ts              | 11 +++++++++++
 .../address-type/address-type.component.html          |  3 +++
 frontend/src/app/shared/script.utils.ts               |  1 +
 5 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/backend/src/api/bitcoin/bitcoin-api.ts b/backend/src/api/bitcoin/bitcoin-api.ts
index 3e1fe2108..7fa431db6 100644
--- a/backend/src/api/bitcoin/bitcoin-api.ts
+++ b/backend/src/api/bitcoin/bitcoin-api.ts
@@ -323,6 +323,7 @@ class BitcoinApi implements AbstractBitcoinApi {
       'witness_v1_taproot': 'v1_p2tr',
       'nonstandard': 'nonstandard',
       'multisig': 'multisig',
+      'anchor': 'anchor',
       'nulldata': 'op_return'
     };
 
diff --git a/frontend/src/app/components/address-labels/address-labels.component.ts b/frontend/src/app/components/address-labels/address-labels.component.ts
index dd81b9809..ff3c27240 100644
--- a/frontend/src/app/components/address-labels/address-labels.component.ts
+++ b/frontend/src/app/components/address-labels/address-labels.component.ts
@@ -55,7 +55,7 @@ export class AddressLabelsComponent implements OnChanges {
   }
 
   handleVin() {
-    const address = new AddressTypeInfo(this.network || 'mainnet', this.vin.prevout?.scriptpubkey_address, this.vin.prevout?.scriptpubkey_type as AddressType, [this.vin])
+    const address = new AddressTypeInfo(this.network || 'mainnet', this.vin.prevout?.scriptpubkey_address, this.vin.prevout?.scriptpubkey_type as AddressType, [this.vin]);
     if (address?.scripts.size) {
       const script = address?.scripts.values().next().value;
       if (script.template?.label) {
diff --git a/frontend/src/app/shared/address-utils.ts b/frontend/src/app/shared/address-utils.ts
index 92646af14..59c85014b 100644
--- a/frontend/src/app/shared/address-utils.ts
+++ b/frontend/src/app/shared/address-utils.ts
@@ -17,6 +17,7 @@ export type AddressType = 'fee'
   | 'v0_p2wsh'
   | 'v1_p2tr'
   | 'confidential'
+  | 'anchor'
   | 'unknown'
 
 const ADDRESS_PREFIXES = {
@@ -188,6 +189,12 @@ export class AddressTypeInfo {
         const v = vin[0];
         this.processScript(new ScriptInfo('scriptpubkey', v.prevout.scriptpubkey, v.prevout.scriptpubkey_asm));
       }
+    } else if (this.type === 'unknown') {
+      for (const v of vin) {
+        if (v.prevout?.scriptpubkey === '51024e73') {
+          this.type = 'anchor';
+        }
+      }
     }
     // and there's nothing more to learn from processing inputs for other types
   }
@@ -197,6 +204,10 @@ export class AddressTypeInfo {
       if (!this.scripts.size) {
         this.processScript(new ScriptInfo('scriptpubkey', output.scriptpubkey, output.scriptpubkey_asm));
       }
+    } else if (this.type === 'unknown') {
+      if (output.scriptpubkey === '51024e73') {
+        this.type = 'anchor';
+      }
     }
   }
 
diff --git a/frontend/src/app/shared/components/address-type/address-type.component.html b/frontend/src/app/shared/components/address-type/address-type.component.html
index fe4286689..598c21a6e 100644
--- a/frontend/src/app/shared/components/address-type/address-type.component.html
+++ b/frontend/src/app/shared/components/address-type/address-type.component.html
@@ -20,6 +20,9 @@
   @case ('multisig') {
     <span i18n="address.bare-multisig">bare multisig</span>
   }
+  @case ('anchor') {
+    <span>anchor</span>
+  }
   @case (null) {
     <span>unknown</span>
   }
diff --git a/frontend/src/app/shared/script.utils.ts b/frontend/src/app/shared/script.utils.ts
index 171112dcc..637eede30 100644
--- a/frontend/src/app/shared/script.utils.ts
+++ b/frontend/src/app/shared/script.utils.ts
@@ -166,6 +166,7 @@ export const ScriptTemplates: { [type: string]: (...args: any) => ScriptTemplate
   ln_anchor: () => ({ type: 'ln_anchor', label: 'Lightning Anchor' }),
   ln_anchor_swept: () => ({ type: 'ln_anchor_swept', label: 'Swept Lightning Anchor' }),
   multisig: (m: number, n: number) => ({ type: 'multisig', m, n, label: $localize`:@@address-label.multisig:Multisig ${m}:multisigM: of ${n}:multisigN:` }),
+  anchor: () => ({ type: 'anchor', label: 'anchor' }),
 };
 
 export class ScriptInfo {