refactor(key-wallet): improve API with standard FromStr trait and bet…

key-wallet/examples/basic_usage.rs

@@ -67,7 +67,7 @@ fn main() -> core::result::Result<(), Box<dyn std::error::Error>> {
     // 8. Address parsing example
     println!("\n8. Address parsing...");
     let test_address = "XyPvhVmhWKDgvMJLwfFfMwhxpxGgd3TBxq";
-    match key_wallet::address::Address::from_str(test_address) {
+    match test_address.parse::<key_wallet::address::Address>() {
         Ok(parsed) => {
             println!("   Parsed address: {}", parsed);
             println!("   Type: {:?}", parsed.address_type);
@@ -84,7 +84,6 @@ fn demonstrate_address_generation() -> core::result::Result<(), Box<dyn std::err
     // This demonstrates bulk address generation
     let seed = [0u8; 64];
     let wallet = HDWallet::from_seed(&seed, Network::Dash)?;
-    let account = wallet.bip44_account(0)?;
     let path = key_wallet::DerivationPath::from(vec![
         key_wallet::ChildNumber::from_hardened_idx(44).unwrap(),
         key_wallet::ChildNumber::from_hardened_idx(5).unwrap(),

key-wallet/src/address.rs

@@ -3,6 +3,7 @@
 use alloc::string::String;
 use alloc::vec::Vec;
 use core::fmt;
+use core::str::FromStr;
 
 use bitcoin_hashes::{hash160, Hash};
 use secp256k1::{PublicKey, Secp256k1};
@@ -97,7 +98,39 @@ impl Address {
     }
 
     /// Parse an address from a string (network is inferred from version byte)
-    pub fn from_str(s: &str) -> Result<Self> {
+    pub fn from_string(s: &str) -> Result<Self> {
+        s.parse()
+    }
+
+    /// Get the script pubkey for this address
+    pub fn script_pubkey(&self) -> Vec<u8> {
+        match self.address_type {
+            AddressType::P2PKH => {
+                let mut script = Vec::with_capacity(25);
+                script.push(0x76); // OP_DUP
+                script.push(0xa9); // OP_HASH160
+                script.push(0x14); // Push 20 bytes
+                script.extend_from_slice(&self.hash[..]);
+                script.push(0x88); // OP_EQUALVERIFY
+                script.push(0xac); // OP_CHECKSIG
+                script
+            }
+            AddressType::P2SH => {
+                let mut script = Vec::with_capacity(23);
+                script.push(0xa9); // OP_HASH160
+                script.push(0x14); // Push 20 bytes
+                script.extend_from_slice(&self.hash[..]);
+                script.push(0x87); // OP_EQUAL
+                script
+            }
+        }
+    }
+}
+
+impl FromStr for Address {
+    type Err = Error;
+
+    fn from_str(s: &str) -> Result<Self> {
         let data = base58ck::decode_check(s)
             .map_err(|_| Error::InvalidAddress("Invalid base58 encoding".into()))?;
 
@@ -132,30 +165,6 @@ impl Address {
             hash,
         })
     }
-
-    /// Get the script pubkey for this address
-    pub fn script_pubkey(&self) -> Vec<u8> {
-        match self.address_type {
-            AddressType::P2PKH => {
-                let mut script = Vec::with_capacity(25);
-                script.push(0x76); // OP_DUP
-                script.push(0xa9); // OP_HASH160
-                script.push(0x14); // Push 20 bytes
-                script.extend_from_slice(&self.hash[..]);
-                script.push(0x88); // OP_EQUALVERIFY
-                script.push(0xac); // OP_CHECKSIG
-                script
-            }
-            AddressType::P2SH => {
-                let mut script = Vec::with_capacity(23);
-                script.push(0xa9); // OP_HASH160
-                script.push(0x14); // Push 20 bytes
-                script.extend_from_slice(&self.hash[..]);
-                script.push(0x87); // OP_EQUAL
-                script
-            }
-        }
-    }
 }
 
 impl fmt::Display for Address {

key-wallet/src/derivation.rs

@@ -28,7 +28,7 @@ impl KeyDerivation for ExtendedPrivKey {
         secp: &Secp256k1<C>,
         path: &DerivationPath,
     ) -> Result<ExtendedPrivKey> {
-        self.derive_priv(secp, path).map_err(Into::into)
+        self.derive_priv(secp, path).map_err(Error::Bip32)
     }
 
     fn derive_pub<C: secp256k1::Signing>(
@@ -74,7 +74,7 @@ impl HDWallet {
 
     /// Derive a key at the given path
     pub fn derive(&self, path: &DerivationPath) -> Result<ExtendedPrivKey> {
-        self.master_key.derive_priv(&self.secp, path).map_err(Into::into)
+        self.master_key.derive_priv(&self.secp, path).map_err(Error::Bip32)
     }
 
     /// Derive a public key at the given path
@@ -158,15 +158,19 @@ impl AccountDerivation {
         let path = format!("m/0/{}", index)
             .parse::<DerivationPath>()
             .map_err(|e| Error::InvalidDerivationPath(e.to_string()))?;
-        self.account_key.derive_pub(&self.secp, &path).map_err(Into::into)
+        let priv_key = self.account_key.derive_priv(&self.secp, &path)
+            .map_err(Error::Bip32)?;
+        Ok(ExtendedPubKey::from_priv(&self.secp, &priv_key))
     }
 
     /// Derive an internal (change) address at index
     pub fn change_address(&self, index: u32) -> Result<ExtendedPubKey> {
         let path = format!("m/1/{}", index)
             .parse::<DerivationPath>()
             .map_err(|e| Error::InvalidDerivationPath(e.to_string()))?;
-        self.account_key.derive_pub(&self.secp, &path).map_err(Into::into)
+        let priv_key = self.account_key.derive_priv(&self.secp, &path)
+            .map_err(Error::Bip32)?;
+        Ok(ExtendedPubKey::from_priv(&self.secp, &priv_key))
     }
 }
 

key-wallet/tests/address_tests.rs

@@ -1,5 +1,6 @@
 //! Address tests
 
+use std::str::FromStr;
 use bitcoin_hashes::{hash160, Hash};
 use key_wallet::address::{Address, AddressGenerator, AddressType};
 use key_wallet::derivation::HDWallet;
@@ -98,7 +99,6 @@ fn test_address_generator() {
     let wallet = HDWallet::from_seed(&seed, Network::Dash).unwrap();
 
     // Get account public key
-    let account = wallet.bip44_account(0).unwrap();
     let path = key_wallet::DerivationPath::from(vec![
         key_wallet::ChildNumber::from_hardened_idx(44).unwrap(),
         key_wallet::ChildNumber::from_hardened_idx(5).unwrap(),

key-wallet/tests/mnemonic_tests.rs

@@ -1,7 +1,7 @@
 //! Mnemonic tests
 
 use key_wallet::mnemonic::{Language, Mnemonic};
-use key_wallet::{ExtendedPrivKey, Network};
+use key_wallet::Network;
 
 #[test]
 fn test_mnemonic_validation() {