Merge bitcoin/bitcoin#22364: wallet: Make a tr() descriptor by default

4868c9f1b3 Extract Taproot internal keyid with GetKeyFromDestination (Andrew Chow)
d8abbe119c Mention bech32m in -addresstype and -changetype help (Andrew Chow)
8fb57845ee Create a tr() descriptor bech32m DescriptorScriptPubKeyMan by default (Andrew Chow)
54b3699862 Store pubkeys in TRDescriptor::MakeScripts (Andrew Chow)

Pull request description:

  Make a `tr()` descriptor by default in descriptor wallets so that users will be able to make and use segwit v1 bech32m addresses.

ACKs for top commit:
  MarcoFalke:
    Concept ACK 4868c9f1b3
  Sjors:
    re-utACK 4868c9f1b3
  gruve-p:
    ACK 4868c9f1b3
  meshcollider:
    Concept + code review ACK 4868c9f1b3

Tree-SHA512: e5896e665b8d559f1d759b6582d1bb24f70d4698a57307684339d9fdcdac28ae9bc17bc946a7efec9cb35c130a95ffc36e3961a335124ec4535d77b8d00e9631

src/wallet/scriptpubkeyman.cpp

@@ -1876,12 +1876,6 @@ bool DescriptorScriptPubKeyMan::AddDescriptorKeyWithDB(WalletBatch& batch, const
 
 bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(const CExtKey& master_key, OutputType addr_type, bool internal)
 {
-    if (addr_type == OutputType::BECH32M) {
-        // Don't allow setting up taproot descriptors yet
-        // TODO: Allow setting up taproot descriptors
-        return false;
-    }
-
     LOCK(cs_desc_man);
     assert(m_storage.IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
 
@@ -1911,7 +1905,10 @@ bool DescriptorScriptPubKeyMan::SetupDescriptorGeneration(const CExtKey& master_
         desc_prefix = "wpkh(" + xpub + "/84'";
         break;
     }
-    case OutputType::BECH32M: assert(false); // TODO: Setup taproot descriptor
+    case OutputType::BECH32M: {
+        desc_prefix = "tr(" + xpub  + "/86'";
+        break;
+    }
     } // no default case, so the compiler can warn about missing cases
     assert(!desc_prefix.empty());