Update to secp256k1 0.21.2

Cargo.toml

@@ -35,7 +35,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 bech32 = { version = "0.8.1", default-features = false }
 bitcoin_hashes = { version = "0.10.0", default-features = false }
-secp256k1 = { version = "0.20.3", default-features = false }
+secp256k1 = { version = "0.21.2", default-features = false }
 core2 = { version = "0.3.0", optional = true, default-features = false }
 
 base64-compat = { version = "1.0.0", optional = true }
@@ -46,7 +46,7 @@ hashbrown = { version = "0.8", optional = true }
 [dev-dependencies]
 serde_json = "<1.0.45"
 serde_test = "1"
-secp256k1 = { version = "0.20.0", features = [ "recovery", "rand-std" ] }
+secp256k1 = { version = "0.21.2", features = [ "recovery", "rand-std" ] }
 bincode = "1.3.1"
 # We need to pin ryu (transitive dep from serde_json) to stay compatible with Rust 1.22.0
 ryu = "<1.0.5"

src/util/address.rs

@@ -879,7 +879,7 @@ mod tests {
     use blockdata::script::Script;
     use network::constants::Network::{Bitcoin, Testnet};
     use util::ecdsa::PublicKey;
-    use secp256k1::schnorrsig;
+    use secp256k1::XOnlyPublicKey;
 
     use super::*;
 
@@ -1266,7 +1266,7 @@ mod tests {
     #[test]
     fn p2tr_from_untweaked(){
         //Test case from BIP-086
-        let internal_key = schnorrsig::PublicKey::from_str("cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115").unwrap();
+        let internal_key = XOnlyPublicKey::from_str("cc8a4bc64d897bddc5fbc2f670f7a8ba0b386779106cf1223c6fc5d7cd6fc115").unwrap();
         let secp = Secp256k1::verification_only();
         let address = Address::p2tr(&secp, internal_key, None, Network::Bitcoin);
         assert_eq!(address.to_string(), "bc1p5cyxnuxmeuwuvkwfem96lqzszd02n6xdcjrs20cac6yqjjwudpxqkedrcr");

src/util/ecdsa.rs

@@ -419,7 +419,7 @@ impl<'de> ::serde::Deserialize<'de> for PublicKey {
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub struct EcdsaSig {
     /// The underlying ECDSA Signature
-    pub sig: secp256k1::Signature,
+    pub sig: secp256k1::ecdsa::Signature,
     /// The corresponding hash type
     pub hash_ty: EcdsaSigHashType,
 }
@@ -432,7 +432,7 @@ impl EcdsaSig {
             .ok_or(EcdsaSigError::EmptySignature)?;
         let hash_ty = EcdsaSigHashType::from_u32_standard(*hash_ty as u32)
             .map_err(|_| EcdsaSigError::NonStandardSigHashType(*hash_ty))?;
-        let sig = secp256k1::Signature::from_der(sig)
+        let sig = secp256k1::ecdsa::Signature::from_der(sig)
             .map_err(EcdsaSigError::Secp256k1)?;
         Ok(EcdsaSig { sig, hash_ty })
     }

src/util/misc.rs

@@ -40,7 +40,7 @@ mod message_signing {
 
     use hashes::sha256d;
     use secp256k1;
-    use secp256k1::recovery::{RecoveryId, RecoverableSignature};
+    use secp256k1::ecdsa::{RecoveryId, RecoverableSignature};
 
     use util::ecdsa::PublicKey;
     use util::address::{Address, AddressType};
@@ -146,7 +146,7 @@ mod message_signing {
             msg_hash: sha256d::Hash
         ) -> Result<PublicKey, secp256k1::Error> {
             let msg = secp256k1::Message::from_slice(&msg_hash[..])?;
-            let pubkey = secp_ctx.recover(&msg, &self.signature)?;
+            let pubkey = secp_ctx.recover_ecdsa(&msg, &self.signature)?;
             Ok(PublicKey {
                 key: pubkey,
                 compressed: self.compressed,

src/util/psbt/map/input.rs

@@ -19,6 +19,7 @@ use io;
 use blockdata::script::Script;
 use blockdata::transaction::{EcdsaSigHashType, Transaction, TxOut};
 use consensus::encode;
+use secp256k1::XOnlyPublicKey;
 use util::bip32::KeySource;
 use hashes::{self, hash160, ripemd160, sha256, sha256d};
 use util::ecdsa::PublicKey;
@@ -123,15 +124,15 @@ pub struct Input {
     pub tap_key_sig: Option<schnorr::SchnorrSig>,
     /// Map of <xonlypubkey>|<leafhash> with signature
     #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_script_sigs: BTreeMap<(schnorr::PublicKey, TapLeafHash), schnorr::SchnorrSig>,
+    pub tap_script_sigs: BTreeMap<(XOnlyPublicKey, TapLeafHash), schnorr::SchnorrSig>,
     /// Map of Control blocks to Script version pair
     #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
     pub tap_scripts: BTreeMap<ControlBlock, (Script, LeafVersion)>,
     /// Map of tap root x only keys to origin info and leaf hashes contained in it
     #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_key_origins: BTreeMap<schnorr::PublicKey, (Vec<TapLeafHash>, KeySource)>,
+    pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
     /// Taproot Internal key
-    pub tap_internal_key : Option<schnorr::PublicKey>,
+    pub tap_internal_key : Option<XOnlyPublicKey>,
     /// Taproot Merkle root
     pub tap_merkle_root : Option<TapBranchHash>,
     /// Proprietary key-value pairs for this input.
@@ -214,7 +215,7 @@ impl Map for Input {
             }
             PSBT_IN_TAP_SCRIPT_SIG => {
                 impl_psbt_insert_pair! {
-                    self.tap_script_sigs <= <raw_key: (schnorr::PublicKey, TapLeafHash)>|<raw_value: schnorr::SchnorrSig>
+                    self.tap_script_sigs <= <raw_key: (XOnlyPublicKey, TapLeafHash)>|<raw_value: schnorr::SchnorrSig>
                 }
             }
             PSBT_IN_TAP_LEAF_SCRIPT=> {
@@ -224,12 +225,12 @@ impl Map for Input {
             }
             PSBT_IN_TAP_BIP32_DERIVATION => {
                 impl_psbt_insert_pair! {
-                    self.tap_key_origins <= <raw_key: schnorr::PublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
+                    self.tap_key_origins <= <raw_key: XOnlyPublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
                 }
             }
             PSBT_IN_TAP_INTERNAL_KEY => {
                 impl_psbt_insert_pair! {
-                    self.tap_internal_key <= <raw_key: _>|< raw_value: schnorr::PublicKey>
+                    self.tap_internal_key <= <raw_key: _>|< raw_value: XOnlyPublicKey>
                 }
             }
             PSBT_IN_TAP_MERKLE_ROOT => {
@@ -314,7 +315,7 @@ impl Map for Input {
         }
 
         impl_psbt_get_pair! {
-            rv.push(self.tap_script_sigs as <PSBT_IN_TAP_SCRIPT_SIG, (schnorr::PublicKey, TapLeafHash)>|<Vec<u8>>)
+            rv.push(self.tap_script_sigs as <PSBT_IN_TAP_SCRIPT_SIG, (XOnlyPublicKey, TapLeafHash)>|<Vec<u8>>)
         }
 
         impl_psbt_get_pair! {
@@ -323,11 +324,11 @@ impl Map for Input {
 
         impl_psbt_get_pair! {
             rv.push(self.tap_key_origins as <PSBT_IN_TAP_BIP32_DERIVATION,
-                schnorr::PublicKey>|<(Vec<TapLeafHash>, KeySource)>)
+                XOnlyPublicKey>|<(Vec<TapLeafHash>, KeySource)>)
         }
 
         impl_psbt_get_pair! {
-            rv.push(self.tap_internal_key as <PSBT_IN_TAP_INTERNAL_KEY, _>|<schnorr::PublicKey>)
+            rv.push(self.tap_internal_key as <PSBT_IN_TAP_INTERNAL_KEY, _>|<XOnlyPublicKey>)
         }
 
         impl_psbt_get_pair! {

src/util/psbt/map/output.rs

@@ -18,6 +18,7 @@ use io;
 
 use blockdata::script::Script;
 use consensus::encode;
+use secp256k1::XOnlyPublicKey;
 use util::bip32::KeySource;
 use util::ecdsa::PublicKey;
 use util::psbt;
@@ -25,7 +26,6 @@ use util::psbt::map::Map;
 use util::psbt::raw;
 use util::psbt::Error;
 
-use schnorr;
 use util::taproot::TapLeafHash;
 
 use util::taproot::{NodeInfo, TaprootBuilder};
@@ -59,12 +59,12 @@ pub struct Output {
     #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
     pub bip32_derivation: BTreeMap<PublicKey, KeySource>,
     /// The internal pubkey
-    pub tap_internal_key: Option<schnorr::PublicKey>,
+    pub tap_internal_key: Option<XOnlyPublicKey>,
     /// Taproot Output tree
     pub tap_tree: Option<TapTree>,
     /// Map of tap root x only keys to origin info and leaf hashes contained in it
     #[cfg_attr(feature = "serde", serde(with = "::serde_utils::btreemap_as_seq"))]
-    pub tap_key_origins: BTreeMap<schnorr::PublicKey, (Vec<TapLeafHash>, KeySource)>,
+    pub tap_key_origins: BTreeMap<XOnlyPublicKey, (Vec<TapLeafHash>, KeySource)>,
     /// Proprietary key-value pairs for this output.
     #[cfg_attr(
         feature = "serde",
@@ -148,7 +148,7 @@ impl Map for Output {
             }
             PSBT_OUT_TAP_INTERNAL_KEY => {
                 impl_psbt_insert_pair! {
-                    self.tap_internal_key <= <raw_key: _>|<raw_value: schnorr::PublicKey>
+                    self.tap_internal_key <= <raw_key: _>|<raw_value: XOnlyPublicKey>
                 }
             }
             PSBT_OUT_TAP_TREE => {
@@ -158,7 +158,7 @@ impl Map for Output {
             }
             PSBT_OUT_TAP_BIP32_DERIVATION => {
                 impl_psbt_insert_pair! {
-                    self.tap_key_origins <= <raw_key: schnorr::PublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
+                    self.tap_key_origins <= <raw_key: XOnlyPublicKey>|< raw_value: (Vec<TapLeafHash>, KeySource)>
                 }
             }
             _ => match self.unknown.entry(raw_key) {

src/util/psbt/serialize.rs

@@ -25,7 +25,7 @@ use io;
 use blockdata::script::Script;
 use blockdata::transaction::{EcdsaSigHashType, Transaction, TxOut};
 use consensus::encode::{self, serialize, Decodable, Encodable, deserialize_partial};
-use secp256k1::schnorrsig;
+use secp256k1::{self, XOnlyPublicKey};
 use util::bip32::{ChildNumber, Fingerprint, KeySource};
 use hashes::{hash160, ripemd160, sha256, sha256d, Hash};
 use util::ecdsa::PublicKey;
@@ -157,15 +157,15 @@ impl Deserialize for EcdsaSigHashType {
 }
 
 // Taproot related ser/deser
-impl Serialize for schnorr::PublicKey {
+impl Serialize for XOnlyPublicKey {
     fn serialize(&self) -> Vec<u8> {
-        schnorr::PublicKey::serialize(&self).to_vec()
+        XOnlyPublicKey::serialize(&self).to_vec()
     }
 }
 
-impl Deserialize for schnorr::PublicKey {
+impl Deserialize for XOnlyPublicKey {
     fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        schnorr::PublicKey::from_slice(bytes)
+        XOnlyPublicKey::from_slice(bytes)
             .map_err(|_| encode::Error::ParseFailed("Invalid xonly public key"))
     }
 }
@@ -182,12 +182,12 @@ impl Deserialize for schnorr::SchnorrSig {
             65 => {
                 let hash_ty = SchnorrSigHashType::from_u8(bytes[64])
                     .map_err(|_| encode::Error::ParseFailed("Invalid Sighash type"))?;
-                let sig = schnorrsig::Signature::from_slice(&bytes[..64])
+                let sig = secp256k1::schnorr::Signature::from_slice(&bytes[..64])
                     .map_err(|_| encode::Error::ParseFailed("Invalid Schnorr signature"))?;
                 Ok(schnorr::SchnorrSig{ sig, hash_ty })
             }
             64 => {
-                let sig = schnorrsig::Signature::from_slice(&bytes[..64])
+                let sig = secp256k1::schnorr::Signature::from_slice(&bytes[..64])
                     .map_err(|_| encode::Error::ParseFailed("Invalid Schnorr signature"))?;
                     Ok(schnorr::SchnorrSig{ sig, hash_ty: SchnorrSigHashType::Default })
             }
@@ -196,7 +196,7 @@ impl Deserialize for schnorr::SchnorrSig {
     }
 }
 
-impl Serialize for (schnorr::PublicKey, TapLeafHash) {
+impl Serialize for (XOnlyPublicKey, TapLeafHash) {
     fn serialize(&self) -> Vec<u8> {
         let ser_pk = self.0.serialize();
         let mut buf = Vec::with_capacity(ser_pk.len() + self.1.as_ref().len());
@@ -206,12 +206,12 @@ impl Serialize for (schnorr::PublicKey, TapLeafHash) {
     }
 }
 
-impl Deserialize for (schnorr::PublicKey, TapLeafHash) {
+impl Deserialize for (XOnlyPublicKey, TapLeafHash) {
     fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
         if bytes.len() < 32 {
             return Err(io::Error::from(io::ErrorKind::UnexpectedEof).into())
         }
-        let a: schnorr::PublicKey = Deserialize::deserialize(&bytes[..32])?;
+        let a: XOnlyPublicKey = Deserialize::deserialize(&bytes[..32])?;
         let b: TapLeafHash = Deserialize::deserialize(&bytes[32..])?;
         Ok((a, b))
     }
@@ -266,7 +266,7 @@ impl Serialize for (Vec<TapLeafHash>, KeySource) {
 
 impl Deserialize for (Vec<TapLeafHash>, KeySource) {
     fn deserialize(bytes: &[u8]) -> Result<Self, encode::Error> {
-        let (leafhash_vec, consumed) = deserialize_partial::<Vec::<TapLeafHash>>(&bytes)?;
+        let (leafhash_vec, consumed) = deserialize_partial::<Vec<TapLeafHash>>(&bytes)?;
         let key_source = KeySource::deserialize(&bytes[consumed..])?;
         Ok((leafhash_vec, key_source))
     }

src/util/schnorr.rs

@@ -20,18 +20,18 @@
 use core::fmt;
 use prelude::*;
 
-pub use secp256k1::schnorrsig::{PublicKey, KeyPair};
+pub use secp256k1::{XOnlyPublicKey, KeyPair};
 use secp256k1::{self, Secp256k1, Verification, constants};
 use hashes::Hash;
 use util::taproot::{TapBranchHash, TapTweakHash};
 use SchnorrSigHashType;
 
 /// Untweaked Schnorr public key
-pub type UntweakedPublicKey = PublicKey;
+pub type UntweakedPublicKey = XOnlyPublicKey;
 
 /// Tweaked Schnorr public key
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct TweakedPublicKey(PublicKey);
+pub struct TweakedPublicKey(XOnlyPublicKey);
 
 impl fmt::LowerHex for TweakedPublicKey {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
@@ -58,7 +58,7 @@ pub trait TapTweak {
     ///
     /// # Returns
     /// The tweaked key and its parity.
-    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> (TweakedPublicKey, bool);
+    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> (TweakedPublicKey, secp256k1::Parity);
 
     /// Directly converts an [`UntweakedPublicKey`] to a [`TweakedPublicKey`]
     ///
@@ -68,7 +68,7 @@ pub trait TapTweak {
 }
 
 impl TapTweak for UntweakedPublicKey {
-    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> (TweakedPublicKey, bool) {
+    fn tap_tweak<C: Verification>(self, secp: &Secp256k1<C>, merkle_root: Option<TapBranchHash>) -> (TweakedPublicKey, secp256k1::Parity) {
         let tweak_value = TapTweakHash::from_key_and_tweak(self, merkle_root).into_inner();
         let mut output_key = self.clone();
         let parity = output_key.tweak_add_assign(&secp, &tweak_value).expect("Tap tweak failed");
@@ -83,19 +83,19 @@ impl TapTweak for UntweakedPublicKey {
 }
 
 impl TweakedPublicKey {
-    /// Creates a new [`TweakedPublicKey`] from a [`PublicKey`]. No tweak is applied, consider
+    /// Creates a new [`TweakedPublicKey`] from a [`XOnlyPublicKey`]. No tweak is applied, consider
     /// calling `tap_tweak` on an [`UntweakedPublicKey`] instead of using this constructor.
-    pub fn dangerous_assume_tweaked(key: PublicKey) -> TweakedPublicKey {
+    pub fn dangerous_assume_tweaked(key: XOnlyPublicKey) -> TweakedPublicKey {
         TweakedPublicKey(key)
     }
 
     /// Returns the underlying public key.
-    pub fn into_inner(self) -> PublicKey {
+    pub fn into_inner(self) -> XOnlyPublicKey {
         self.0
     }
 
     /// Returns a reference to underlying public key.
-    pub fn as_inner(&self) -> &PublicKey {
+    pub fn as_inner(&self) -> &XOnlyPublicKey {
         &self.0
     }
 
@@ -113,7 +113,7 @@ impl TweakedPublicKey {
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct SchnorrSig {
     /// The underlying schnorr signature
-    pub sig: secp256k1::schnorrsig::Signature,
+    pub sig: secp256k1::schnorr::Signature,
     /// The corresponding hash type
     pub hash_ty: SchnorrSigHashType,
 }
@@ -125,7 +125,7 @@ impl SchnorrSig {
         match sl.len() {
             64 => {
                 // default type
-                let sig = secp256k1::schnorrsig::Signature::from_slice(sl)
+                let sig = secp256k1::schnorr::Signature::from_slice(sl)
                     .map_err(SchnorrSigError::Secp256k1)?;
                 return Ok( SchnorrSig { sig, hash_ty : SchnorrSigHashType::Default });
             },
@@ -133,7 +133,7 @@ impl SchnorrSig {
                 let (hash_ty, sig) = sl.split_last().expect("Slice len checked == 65");
                 let hash_ty = SchnorrSigHashType::from_u8(*hash_ty)
                     .map_err(|_| SchnorrSigError::InvalidSighashType(*hash_ty))?;
-                let sig = secp256k1::schnorrsig::Signature::from_slice(sig)
+                let sig = secp256k1::schnorr::Signature::from_slice(sig)
                     .map_err(SchnorrSigError::Secp256k1)?;
                 Ok(SchnorrSig { sig, hash_ty })
             }

src/util/sighash.rs

@@ -754,7 +754,7 @@ mod tests {
     use std::str::FromStr;
     use hashes::hex::ToHex;
     use util::taproot::{TapTweakHash, TapSighashHash, TapBranchHash, TapLeafHash};
-    use secp256k1::{self, SecretKey};
+    use secp256k1::{self, SecretKey, XOnlyPublicKey};
     extern crate serde_json;
 
     use {Script, Transaction, TxIn, TxOut};
@@ -1043,23 +1043,22 @@ mod tests {
             };
             let hash_ty = SchnorrSigHashType::from_u8(inp["given"]["hashType"].as_u64().unwrap() as u8).unwrap();
 
-            use schnorr::PublicKey as XOnlyPubKey;
+            let expected_internal_pk = hex_hash!(XOnlyPublicKey, inp["intermediary"]["internalPubkey"].as_str().unwrap());
-            let expected_internal_pk = hex_hash!(XOnlyPubKey, inp["intermediary"]["internalPubkey"].as_str().unwrap());
             let expected_tweak = hex_hash!(TapTweakHash, inp["intermediary"]["tweak"].as_str().unwrap());
             let _expected_tweaked_priv_key = hex_hash!(SecretKey, inp["intermediary"]["tweakedPrivkey"].as_str().unwrap());
             let expected_sig_msg = Vec::<u8>::from_hex(inp["intermediary"]["sigMsg"].as_str().unwrap()).unwrap();
             let expected_sig_hash = hex_hash!(TapSighashHash, inp["intermediary"]["sigHash"].as_str().unwrap());
             let sig_str = inp["expected"]["witness"][0].as_str().unwrap();
             let (expected_key_spend_sig, expected_hash_ty) = if sig_str.len() == 128 {
-                (secp256k1::schnorrsig::Signature::from_str(sig_str).unwrap(), SchnorrSigHashType::Default)
+                (secp256k1::schnorr::Signature::from_str(sig_str).unwrap(), SchnorrSigHashType::Default)
             } else {
                 let hash_ty = SchnorrSigHashType::from_u8(Vec::<u8>::from_hex(&sig_str[128..]).unwrap()[0]).unwrap();
-                (secp256k1::schnorrsig::Signature::from_str(&sig_str[..128]).unwrap(), hash_ty)
+                (secp256k1::schnorr::Signature::from_str(&sig_str[..128]).unwrap(), hash_ty)
             };
 
             // tests
-            let keypair = secp256k1::schnorrsig::KeyPair::from_secret_key(&secp, internal_priv_key);
+            let keypair = secp256k1::KeyPair::from_secret_key(&secp, internal_priv_key);
-            let internal_key = XOnlyPubKey::from_keypair(secp, &keypair);
+            let internal_key = XOnlyPublicKey::from_keypair(&keypair);
             let tweak = TapTweakHash::from_key_and_tweak(internal_key, merkle_root);
             let mut tweaked_keypair = keypair;
             tweaked_keypair.tweak_add_assign(&secp, &tweak).unwrap();
@@ -1081,7 +1080,7 @@ mod tests {
             ).unwrap();
 
             let msg = secp256k1::Message::from_slice(&sig_hash).unwrap();
-            let key_spend_sig = secp.schnorrsig_sign_with_aux_rand(&msg, &tweaked_keypair, &[0u8; 32]);
+            let key_spend_sig = secp.sign_schnorr_with_aux_rand(&msg, &tweaked_keypair, &[0u8; 32]);
 
             assert_eq!(expected_internal_pk, internal_key);
             assert_eq!(expected_tweak, tweak);

src/util/taproot.rs

@@ -175,7 +175,7 @@ pub struct TaprootSpendInfo {
     /// The Merkle root of the script tree (None if there are no scripts)
     merkle_root: Option<TapBranchHash>,
     /// The sign final output pubkey as per BIP 341
-    output_key_parity: bool,
+    output_key_parity: secp256k1::Parity,
     /// The tweaked output key
     output_key: TweakedPublicKey,
     /// Map from (script, leaf_version) to (sets of) [`TaprootMerkleBranch`].
@@ -288,7 +288,7 @@ impl TaprootSpendInfo {
     }
 
     /// Parity of the output key. See also [`TaprootSpendInfo::output_key`]
-    pub fn output_key_parity(&self) -> bool {
+    pub fn output_key_parity(&self) -> secp256k1::Parity {
         self.output_key_parity
     }
 
@@ -657,7 +657,7 @@ pub struct ControlBlock {
     /// The tapleaf version,
     pub leaf_version: LeafVersion,
     /// The parity of the output key (NOT THE INTERNAL KEY WHICH IS ALWAYS XONLY)
-    pub output_key_parity: bool,
+    pub output_key_parity: secp256k1::Parity,
     /// The internal key
     pub internal_key: UntweakedPublicKey,
     /// The merkle proof of a script associated with this leaf
@@ -679,7 +679,7 @@ impl ControlBlock {
         {
             return Err(TaprootError::InvalidControlBlockSize(sl.len()));
         }
-        let output_key_parity = (sl[0] & 1) == 1;
+        let output_key_parity = secp256k1::Parity::from((sl[0] & 1) as i32);
         let leaf_version = LeafVersion::from_u8(sl[0] & TAPROOT_LEAF_MASK)?;
         let internal_key = UntweakedPublicKey::from_slice(&sl[1..TAPROOT_CONTROL_BASE_SIZE])
             .map_err(TaprootError::InvalidInternalKey)?;
@@ -700,8 +700,7 @@ impl ControlBlock {
 
     /// Serialize to a writer. Returns the number of bytes written
     pub fn encode<Write: io::Write>(&self, mut writer: Write) -> io::Result<usize> {
-        let first_byte: u8 =
+        let first_byte: u8 = i32::from(self.output_key_parity) as u8 | self.leaf_version.as_u8();
-            (if self.output_key_parity { 1 } else { 0 }) | self.leaf_version.as_u8();
         let mut bytes_written = 0;
         bytes_written += writer.write(&[first_byte])?;
         bytes_written += writer.write(&self.internal_key.serialize())?;
@@ -909,9 +908,8 @@ mod test {
     use hashes::hex::{FromHex, ToHex};
     use hashes::sha256t::Tag;
     use hashes::{sha256, Hash, HashEngine};
-    use secp256k1::VerifyOnly;
+    use secp256k1::{VerifyOnly, XOnlyPublicKey};
     use core::str::FromStr;
-    use schnorr;
     extern crate serde_json;
 
     fn tag_engine(tag_name: &str) -> sha256::HashEngine {
@@ -996,7 +994,7 @@ mod test {
     }
 
     fn _verify_tap_commitments(secp: &Secp256k1<VerifyOnly>, out_spk_hex: &str, script_hex : &str, control_block_hex: &str) {
-        let out_pk = schnorr::PublicKey::from_str(&out_spk_hex[4..]).unwrap();
+        let out_pk = XOnlyPublicKey::from_str(&out_spk_hex[4..]).unwrap();
         let out_pk = TweakedPublicKey::dangerous_assume_tweaked(out_pk);
         let script = Script::from_hex(script_hex).unwrap();
         let control_block = ControlBlock::from_slice(&Vec::<u8>::from_hex(control_block_hex).unwrap()).unwrap();
@@ -1152,7 +1150,7 @@ mod test {
         let secp = &secp256k1::Secp256k1::verification_only();
 
         for arr in data["scriptPubKey"].as_array().unwrap() {
-            let internal_key = schnorr::PublicKey::from_str(arr["given"]["internalPubkey"].as_str().unwrap()).unwrap();
+            let internal_key = XOnlyPublicKey::from_str(arr["given"]["internalPubkey"].as_str().unwrap()).unwrap();
             // process the tree
             let script_tree = &arr["given"]["scriptTree"];
             let mut merkle_root = None;
@@ -1176,7 +1174,7 @@ mod test {
                     assert_eq!(ctrl_blk, expected_ctrl_blk);
                 }
             }
-            let expected_output_key = schnorr::PublicKey::from_str(arr["intermediary"]["tweakedPubkey"].as_str().unwrap()).unwrap();
+            let expected_output_key = XOnlyPublicKey::from_str(arr["intermediary"]["tweakedPubkey"].as_str().unwrap()).unwrap();
             let expected_tweak = TapTweakHash::from_str(arr["intermediary"]["tweak"].as_str().unwrap()).unwrap();
             let expected_spk = Script::from_str(arr["expected"]["scriptPubKey"].as_str().unwrap()).unwrap();
             let expected_addr = Address::from_str(arr["expected"]["bip350Address"].as_str().unwrap()).unwrap();