Merge pull request #4 from t4t5/main

Support explicitly setting pointer tag to zero

src/index.ts

@@ -113,7 +113,13 @@ const TagCoder: P.Coder<TagRaw[], Tags> = {
         for (const p of to.parent) res.push({ tag: tagName, data: TagCoders.parent.encode(p) });
         continue;
       }
-      const bytes = TagCoders[field as TagName].encode(to[field as TagName]);
+      let bytes = TagCoders[field as TagName].encode(to[field as TagName]);
+
+      // Handle pointer = 0:
+      if (field === 'pointer' && bytes.length === 0) {
+        bytes = new Uint8Array([0]);
+      }
+
       for (const data of splitChunks(bytes)) res.push({ tag: tagName, data });
     }
     if (to.unknown) {

test/ordinals.test.js

@@ -1,4 +1,4 @@
-import { deepStrictEqual } from 'node:assert';
+import { deepStrictEqual, strictEqual } from 'node:assert';
 import { describe, should } from 'micro-should';
 import { hex, utf8 } from '@scure/base';
 import * as btc from '@scure/btc-signer';
@@ -67,6 +67,17 @@ describe('Ordinals', () => {
     });
   });
 
+  should('support explicit pointer 0', () => {
+    const { TagCoder } = ordinals.__test__;
+    const encoded = TagCoder.decode({ pointer: 0n });
+
+    const encodedTag = encoded[0].tag[0]
+    const encodedValue = encoded[0].data[0]
+
+    strictEqual(encodedTag, 2);
+    strictEqual(encodedValue, 0);
+  })
+
   should('inscription/11820782', () => {
     // https://ordiscan.com/inscription/11820782
     const rawTx = ordvectors[0].raw_tx;