Refactored wallet creation so it's outside of either esplora or electrum client code

side-node/src/bitcoin/clients/mod.rs

@@ -1,2 +1,27 @@
+use bdk::{
+    bitcoin::Network, database::MemoryDatabase, keys::ExtendedKey, template::Bip84, KeychainKind,
+    Wallet,
+};
+
+// Re-enable this if we want to use alongside a fullnode.
 pub mod electrum;
 pub mod esplora;
+
+/// Create a BDK wallet using BIP 84 descriptor ("m/84h/1h/0h/0" and "m/84h/1h/0h/1")
+pub fn create_wallet(xkey: ExtendedKey) -> anyhow::Result<Wallet<MemoryDatabase>> {
+    let xprv = xkey
+        .into_xprv(Network::Testnet)
+        .expect("couldn't turn xkey into xprv");
+
+    let external_descriptor = Bip84(xprv, KeychainKind::External);
+    let internal_descriptor = Some(Bip84(xprv, KeychainKind::Internal));
+
+    let wallet = Wallet::new(
+        external_descriptor,
+        internal_descriptor,
+        Network::Testnet,
+        MemoryDatabase::default(),
+    )?;
+
+    Ok(wallet)
+}