feat(wasm-utxo): update test utils to use XprvTriple directly

Use fixtures::XprvTriple instead of RootWalletKeys in test utils to
simplify signature testing with wallets.

Issue: BTC-2652

Co-authored-by: llm-git <[email protected]>

Author: OttoAllmendinger

packages/wasm-utxo/src/bitgo_psbt/mod.rs

@@ -390,27 +390,27 @@ mod tests {
         network: Network,
         tx_format: fixtures::TxFormat,
         unsigned_bitgo_psbt: &BitGoPsbt,
-        wallet_keys: &RootWalletKeys,
+        wallet_keys: &fixtures::XprvTriple,
         input_index: usize,
         input_fixture: &fixtures::PsbtInputFixture,
         halfsigned_fixture: &fixtures::PsbtInputFixture,
     ) -> Result<(), String> {
-        // todo!()
+        let user_key = wallet_keys.user_key();
         Ok(())
     }
 
     fn assert_full_signed_matches_wallet_scripts(
         network: Network,
         tx_format: fixtures::TxFormat,
         fixture: &fixtures::PsbtFixture,
-        wallet_keys: &RootWalletKeys,
+        wallet_keys: &fixtures::XprvTriple,
         input_index: usize,
         input_fixture: &fixtures::PsbtInputFixture,
     ) -> Result<(), String> {
         let (chain, index) =
             parse_fixture_paths(input_fixture).expect("Failed to parse fixture paths");
         let scripts = WalletScripts::from_wallet_keys(
-            wallet_keys,
+            &wallet_keys.to_root_wallet_keys(),
             chain,
             index,
             &network.output_script_support(),

packages/wasm-utxo/src/fixed_script_wallet/test_utils/fixtures.rs

@@ -525,7 +525,7 @@ pub struct PsbtFixture {
 pub struct PsbtStages {
     pub network: Network,
     pub tx_format: TxFormat,
-    pub wallet_keys: crate::fixed_script_wallet::RootWalletKeys,
+    pub wallet_keys: XprvTriple,
     pub unsigned: PsbtFixture,
     pub halfsigned: PsbtFixture,
     pub fullsigned: PsbtFixture,
@@ -562,12 +562,11 @@ impl PsbtStages {
             .expect("Failed to parse wallet keys");
         assert_eq!(wallet_keys_unsigned, wallet_keys_halfsigned);
         assert_eq!(wallet_keys_unsigned, wallet_keys_fullsigned);
-        let wallet_keys = wallet_keys_unsigned.to_root_wallet_keys();
 
         Ok(Self {
             network,
             tx_format,
-            wallet_keys,
+            wallet_keys: wallet_keys_unsigned.clone(),
             unsigned,
             halfsigned,
             fullsigned,
@@ -578,7 +577,7 @@ impl PsbtStages {
 pub struct PsbtInputStages {
     pub network: Network,
     pub tx_format: TxFormat,
-    pub wallet_keys: crate::fixed_script_wallet::RootWalletKeys,
+    pub wallet_keys: XprvTriple,
     pub wallet_script_type: ScriptType,
     pub input_index: usize,
     pub input_fixture_unsigned: PsbtInputFixture,