fix(wasm-utxo): swap internal and external chain values for taproot

The taproot chains had internal/external values swapped compared to other
script types. This commit fixes the enum values to be consistent, making
external chains have even values and internal chains have odd values.

This is not a breaking change since the internal/external distinctions were
not surfaced in the public API.

Co-authored-by: llm-git <llm-git@ttll.de>

Issue: BTC-2916

Author: OttoAllmendinger

packages/wasm-utxo/src/fixed_script_wallet/wallet_scripts/mod.rs

@@ -128,10 +128,10 @@ pub enum Chain {
     P2shP2wshInternal = 11,
     P2wshExternal = 20,
     P2wshInternal = 21,
-    P2trInternal = 30,
-    P2trExternal = 31,
-    P2trMusig2Internal = 40,
-    P2trMusig2External = 41,
+    P2trExternal = 30,
+    P2trInternal = 31,
+    P2trMusig2External = 40,
+    P2trMusig2Internal = 41,
 }
 
 /// Useful for iterating over enum values
@@ -142,10 +142,10 @@ const ALL_CHAINS: [Chain; 10] = [
     Chain::P2shP2wshInternal,
     Chain::P2wshExternal,
     Chain::P2wshInternal,
-    Chain::P2trInternal,
     Chain::P2trExternal,
-    Chain::P2trMusig2Internal,
+    Chain::P2trInternal,
     Chain::P2trMusig2External,
+    Chain::P2trMusig2Internal,
 ];
 
 impl Chain {
@@ -272,28 +272,28 @@ mod tests {
                 assert_output_script(
                     keys,
                     chain,
-                    "51203a81504b836967a69399fcf3822adfdb7d61061e42418f6aad0d473cbcc69b86",
+                    "512093e5e3c8885a6f87b4449e1bffa3ba8a45a9ee634dc27408394c7d9b68f01adc",
                 );
             }
             Chain::P2trExternal => {
                 assert_output_script(
                     keys,
                     chain,
-                    "512093e5e3c8885a6f87b4449e1bffa3ba8a45a9ee634dc27408394c7d9b68f01adc",
+                    "51203a81504b836967a69399fcf3822adfdb7d61061e42418f6aad0d473cbcc69b86",
                 );
             }
             Chain::P2trMusig2Internal => {
                 assert_output_script(
                     keys,
                     chain,
-                    "5120c7c4dd55b2bf3cd7ea5b27d3da521699ce761aa345523d8486f0336364957ef2",
+                    "51202629eea5dbef6841160a0b752dedd4b8e206f046835ee944848679d6dea2ac2c",
                 );
             }
             Chain::P2trMusig2External => {
                 assert_output_script(
                     keys,
                     chain,
-                    "51202629eea5dbef6841160a0b752dedd4b8e206f046835ee944848679d6dea2ac2c",
+                    "5120c7c4dd55b2bf3cd7ea5b27d3da521699ce761aa345523d8486f0336364957ef2",
                 );
             }
         }