Add coin charm

src/charm.rs

@@ -1,5 +1,6 @@
 #[derive(Copy, Clone)]
 pub(crate) enum Charm {
+  Coin,
   Cursed,
   Epic,
   Legendary,
@@ -12,16 +13,17 @@ pub(crate) enum Charm {
 }
 
 impl Charm {
-  pub(crate) const ALL: [Charm; 9] = [
-    Charm::Uncommon,
-    Charm::Rare,
-    Charm::Epic,
-    Charm::Legendary,
-    Charm::Nineball,
-    Charm::Reinscription,
-    Charm::Cursed,
-    Charm::Unbound,
-    Charm::Lost,
+  pub(crate) const ALL: [Charm; 10] = [
+    Self::Coin,
+    Self::Uncommon,
+    Self::Rare,
+    Self::Epic,
+    Self::Legendary,
+    Self::Nineball,
+    Self::Reinscription,
+    Self::Cursed,
+    Self::Unbound,
+    Self::Lost,
   ];
 
   fn flag(self) -> u16 {
@@ -38,29 +40,31 @@ impl Charm {
 
   pub(crate) fn icon(self) -> &'static str {
     match self {
-      Charm::Cursed => "👹",
-      Charm::Epic => "🪻",
-      Charm::Legendary => "🌝",
-      Charm::Lost => "🤔",
-      Charm::Nineball => "9️⃣",
-      Charm::Rare => "🧿",
-      Charm::Reinscription => "♻️",
-      Charm::Unbound => "🔓",
-      Charm::Uncommon => "🌱",
+      Self::Coin => "🪙",
+      Self::Cursed => "👹",
+      Self::Epic => "🪻",
+      Self::Legendary => "🌝",
+      Self::Lost => "🤔",
+      Self::Nineball => "9️⃣",
+      Self::Rare => "🧿",
+      Self::Reinscription => "♻️",
+      Self::Unbound => "🔓",
+      Self::Uncommon => "🌱",
     }
   }
 
   pub(crate) fn title(self) -> &'static str {
     match self {
-      Charm::Cursed => "cursed",
-      Charm::Epic => "epic",
-      Charm::Legendary => "legendary",
-      Charm::Lost => "lost",
-      Charm::Nineball => "nineball",
-      Charm::Rare => "rare",
-      Charm::Reinscription => "reinscription",
-      Charm::Unbound => "unbound",
-      Charm::Uncommon => "uncommon",
+      Self::Coin => "coin",
+      Self::Cursed => "cursed",
+      Self::Epic => "epic",
+      Self::Legendary => "legendary",
+      Self::Lost => "lost",
+      Self::Nineball => "nineball",
+      Self::Rare => "rare",
+      Self::Reinscription => "reinscription",
+      Self::Unbound => "unbound",
+      Self::Uncommon => "uncommon",
     }
   }
 }

src/index.rs

@@ -1749,7 +1749,7 @@ impl Index {
             .any(|entry| entry.unwrap().value() == sequence_number));
 
           // we do not track common sats (only the sat ranges)
-          if !Sat(sat).is_common() {
+          if !Sat(sat).common() {
             assert_eq!(
               SatPoint::load(
                 *rtx

src/index/updater.rs

@@ -517,7 +517,7 @@ impl<'index> Updater<'_> {
           .unwrap_or_default();
 
         for (start, end) in coinbase_inputs {
-          if !Sat(start).is_common() {
+          if !Sat(start).common() {
             sat_to_satpoint.insert(
               &start,
               &SatPoint {
@@ -642,7 +642,7 @@ impl<'index> Updater<'_> {
           .pop_front()
           .ok_or_else(|| anyhow!("insufficient inputs for transaction outputs"))?;
 
-        if !Sat(range.0).is_common() {
+        if !Sat(range.0).common() {
           sat_to_satpoint.insert(
             &range.0,
             &SatPoint {

src/index/updater/inscription_updater.rs

@@ -426,6 +426,10 @@ impl<'a, 'db, 'tx> InscriptionUpdater<'a, 'db, 'tx> {
             Charm::Nineball.set(&mut charms);
           }
 
+          if sat.coin() {
+            Charm::Coin.set(&mut charms);
+          }
+
           match sat.rarity() {
             Rarity::Common | Rarity::Mythic => {}
             Rarity::Uncommon => Charm::Uncommon.set(&mut charms),

src/sat.rs

@@ -60,11 +60,15 @@ impl Sat {
   /// `Sat::rarity` is expensive and is called frequently when indexing.
   /// Sat::is_common only checks if self is `Rarity::Common` but is
   /// much faster.
-  pub(crate) fn is_common(self) -> bool {
+  pub(crate) fn common(self) -> bool {
     let epoch = self.epoch();
     (self.0 - epoch.starting_sat().0) % epoch.subsidy() != 0
   }
 
+  pub(crate) fn coin(self) -> bool {
+    self.n() % COIN_VALUE == 0
+  }
+
   pub(crate) fn name(self) -> String {
     let mut x = Self::SUPPLY - self.0;
     let mut name = String::new();
@@ -615,10 +619,10 @@ mod tests {
   }
 
   #[test]
-  fn is_common() {
+  fn common() {
     #[track_caller]
     fn case(n: u64) {
-      assert_eq!(Sat(n).is_common(), Sat(n).rarity() == Rarity::Common);
+      assert_eq!(Sat(n).common(), Sat(n).rarity() == Rarity::Common);
     }
 
     case(0);
@@ -631,6 +635,14 @@ mod tests {
     case(2067187500000000 + 1);
   }
 
+  #[test]
+  fn coin() {
+    assert!(Sat(0).coin());
+    assert!(!Sat(COIN_VALUE - 1).coin());
+    assert!(Sat(COIN_VALUE).coin());
+    assert!(!Sat(COIN_VALUE + 1).coin());
+  }
+
   #[test]
   fn nineball() {
     for height in 0..10 {

src/subcommand/server.rs

@@ -4217,6 +4217,39 @@ next
     );
   }
 
+  #[test]
+  fn charm_coin() {
+    let server = TestServer::new_with_regtest_with_index_sats();
+
+    server.mine_blocks(2);
+
+    let txid = server.bitcoin_rpc_server.broadcast_tx(TransactionTemplate {
+      inputs: &[(1, 0, 0, inscription("text/plain", "foo").to_witness())],
+      ..Default::default()
+    });
+
+    let id = InscriptionId { txid, index: 0 };
+
+    server.mine_blocks(1);
+
+    server.assert_response_regex(
+      format!("/inscription/{id}"),
+      StatusCode::OK,
+      format!(
+        ".*<h1>Inscription 0</h1>.*
+<dl>
+  <dt>id</dt>
+  <dd class=monospace>{id}</dd>
+  <dt>charms</dt>
+  <dd>.*<span title=coin>🪙</span>.*</dd>
+  .*
+</dl>
+.*
+"
+      ),
+    );
+  }
+
   #[test]
   fn charm_uncommon() {
     let server = TestServer::new_with_regtest_with_index_sats();
@@ -4241,9 +4274,7 @@ next
   <dt>id</dt>
   <dd class=monospace>{id}</dd>
   <dt>charms</dt>
-  <dd>
-    <span title=uncommon>🌱</span>
-  </dd>
+  <dd>.*<span title=uncommon>🌱</span>.*</dd>
   .*
 </dl>
 .*
@@ -4276,10 +4307,7 @@ next
   <dt>id</dt>
   <dd class=monospace>{id}</dd>
   <dt>charms</dt>
-  <dd>
-    <span title=uncommon>🌱</span>
-    <span title=nineball>9️⃣</span>
-  </dd>
+  <dd>.*<span title=nineball>9️⃣</span>.*</dd>
   .*
 </dl>
 .*