Fixed to set key_type to :p2tr when generated by Bitcoin::Key#from_xo…

…nly_pubkey

lib/bitcoin/key.rb

@@ -83,7 +83,7 @@ def self.from_wif(wif)
     # @return [Bitcoin::Key] key object has public key.
     def self.from_xonly_pubkey(xonly_pubkey)
       raise ArgumentError, "xonly_pubkey must be #{X_ONLY_PUBKEY_SIZE} bytes" unless xonly_pubkey.htb.bytesize == X_ONLY_PUBKEY_SIZE
-      Bitcoin::Key.new(pubkey: "02#{xonly_pubkey}", key_type: TYPES[:compressed])
+      Bitcoin::Key.new(pubkey: "02#{xonly_pubkey}", key_type: TYPES[:p2tr])
     end
 
     # Generate from public key point.

spec/bitcoin/key_spec.rb

@@ -131,7 +131,7 @@
       it 'should be treated as an Xonly public key.' do
         digest = Bitcoin.sha256('message')
         key = Bitcoin::Key.new(priv_key: '4f0bdbfda0e7acf1aa44cc5c5e90068096b258089fd8230ed3a7ea5227214038',
-                               key_type: Bitcoin::Key::TYPES[:compressed])
+                               key_type: Bitcoin::Key::TYPES[:p2tr])
         aux = 'bf498c6e09a829330f59127ff176e5c6dbe108893fea46cd11e123ba0425a7b2'
         sig = key.sign(digest, false, aux.htb, algo: :schnorr)
         expect(key.verify(sig, digest, algo: :schnorr)).to be true
@@ -234,6 +234,16 @@
     end
   end
 
+  describe '#from_xonly_pubkey' do
+    it do
+      key = described_class.from_xonly_pubkey('669b8afcec803a0d323e9a17f3ea8e68e8abe5a278020a929adbec52421adbd0')
+      expect(key.xonly_pubkey).to eq('669b8afcec803a0d323e9a17f3ea8e68e8abe5a278020a929adbec52421adbd0')
+      expect(key.key_type).to eq(Bitcoin::Key::TYPES[:p2tr])
+      expect{described_class.from_xonly_pubkey('02669b8afcec803a0d323e9a17f3ea8e68e8abe5a278020a929adbec52421adbd0')}.
+        to raise_error(ArgumentError, "xonly_pubkey must be 32 bytes")
+    end
+  end
+
   describe '#to_addr' do
     it 'return address corresponding to key_type' do
       p2pkh = 'mmy7BEH1SUGAeSVUR22pt5hPaejo2645F1'