descriptors: rename derive into derive_received

We'll be able to derive change addresses too

src/commands/mod.rs

@@ -172,7 +172,9 @@ fn serializable_size<T: bitcoin::consensus::Encodable + ?Sized>(t: &T) -> u64 {
 impl DaemonControl {
     // Get the descriptor at this derivation index
     fn derived_desc(&self, index: bip32::ChildNumber) -> descriptors::DerivedInheritanceDescriptor {
-        self.config.main_descriptor.derive(index, &self.secp)
+        self.config
+            .main_descriptor
+            .derive_receive(index, &self.secp)
     }
 }
 
@@ -201,9 +203,7 @@ impl DaemonControl {
         // TODO: should we wrap around instead of failing?
         db_conn.increment_derivation_index(&self.secp);
         let address = self
-            .config
-            .main_descriptor
-            .derive(index, &self.secp)
+            .derived_desc(index)
             .address(self.config.bitcoin_config.network);
         GetAddressResult { address }
     }

src/database/sqlite/mod.rs

@@ -240,7 +240,7 @@ impl SqliteConn {
             let next_la_index = next_index + LOOK_AHEAD_LIMIT - 1;
             let next_la_address = db_wallet
                 .main_descriptor
-                .derive(next_la_index.into(), secp)
+                .derive_receive(next_la_index.into(), secp)
                 .address(network);
             db_tx
                 .execute(
@@ -714,7 +714,7 @@ mod tests {
             // There is the index for the first index
             let addr = options
                 .main_descriptor
-                .derive(0.into(), &secp)
+                .derive_receive(0.into(), &secp)
                 .address(options.bitcoind_network);
             let db_addr = conn.db_address(&addr).unwrap();
             assert_eq!(db_addr.derivation_index, 0.into());
@@ -722,7 +722,7 @@ mod tests {
             // There is the index for the 199th index (look-ahead limit)
             let addr = options
                 .main_descriptor
-                .derive(199.into(), &secp)
+                .derive_receive(199.into(), &secp)
                 .address(options.bitcoind_network);
             let db_addr = conn.db_address(&addr).unwrap();
             assert_eq!(db_addr.derivation_index, 199.into());
@@ -730,7 +730,7 @@ mod tests {
             // And not for the 200th one.
             let addr = options
                 .main_descriptor
-                .derive(200.into(), &secp)
+                .derive_receive(200.into(), &secp)
                 .address(options.bitcoind_network);
             assert!(conn.db_address(&addr).is_none());
 

src/database/sqlite/utils.rs

@@ -98,7 +98,7 @@ pub fn create_fresh_db(
         // TODO: have this as a helper in descriptors.rs
         let address = options
             .main_descriptor
-            .derive(index.into(), secp)
+            .derive_receive(index.into(), secp)
             .address(options.bitcoind_network);
         query += &format!(
             "INSERT INTO addresses (address, derivation_index) VALUES (\"{}\", {});\n",

src/descriptors.rs

@@ -327,11 +327,11 @@ impl InheritanceDescriptor {
         })
     }
 
-    /// Derive this descriptor at a given index.
+    /// Derive this descriptor at a given index for a receiving address.
     ///
     /// # Panics
     /// - If the given index is hardened.
-    pub fn derive(
+    pub fn derive_receive(
         &self,
         index: bip32::ChildNumber,
         secp: &secp256k1::Secp256k1<impl secp256k1::Verification>,
@@ -504,7 +504,7 @@ mod tests {
     fn inheritance_descriptor_derivation() {
         let secp = secp256k1::Secp256k1::verification_only();
         let desc = InheritanceDescriptor::from_str("wsh(andor(pk(tpubDEN9WSToTyy9ZQfaYqSKfmVqmq1VVLNtYfj3Vkqh67et57eJ5sTKZQBkHqSwPUsoSskJeaYnPttHe2VrkCsKA27kUaN9SDc5zhqeLzKa1rr/*),older(10000),pk(tpubD8LYfn6njiA2inCoxwM7EuN3cuLVcaHAwLYeups13dpevd3nHLRdK9NdQksWXrhLQVxcUZRpnp5CkJ1FhE61WRAsHxDNAkvGkoQkAeWDYjV/*)))#y5wcna2d").unwrap();
-        let der_desc = desc.derive(11.into(), &secp);
+        let der_desc = desc.derive_receive(11.into(), &secp);
         assert_eq!(
             "bc1qvjzcg25nsxmfccct0txjvljxjwn68htkrw57jqmjhfzvhyd2z4msc74w65",
             der_desc.address(bitcoin::Network::Bitcoin).to_string()