tcharding · tcharding · Dec 11, 2025 · Dec 9, 2025 · Dec 9, 2025 · Dec 9, 2025
diff --git a/Cargo-minimal.lock b/Cargo-minimal.lock
@@ -36,21 +36,11 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d965446196e3b7decd44aa7ee49e31d630118f90ef12f97900f262eb915c951d"
 
-[[package]]
-name = "bincode"
-version = "1.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f30d3a39baa26f9651f17b375061f3233dde33424a8b72b0dbe93a68a0bc896d"
-dependencies = [
- "byteorder",
- "serde",
-]
-
 [[package]]
 name = "bitcoin"
-version = "0.32.6"
+version = "0.32.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ad8929a18b8e33ea6b3c09297b687baaa71fb1b97353243a3f1029fad5c59c5b"
+checksum = "1e499f9fc0407f50fe98af744ab44fa67d409f76b6772e1689ec8485eb0c0f66"
 dependencies = [
  "base58ck",
  "base64",
@@ -116,12 +106,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "byteorder"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "60f0b0d4c0a382d2734228fd12b5a6b5dac185c60e938026fd31b265b94f9bd2"
-
 [[package]]
 name = "cc"
 version = "1.0.28"
@@ -147,9 +131,9 @@ dependencies = [
 
 [[package]]
 name = "hex-conservative"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5313b072ce3c597065a808dbf612c4c8e8590bdbf8b579508bf7a762c5eae6cd"
+checksum = "fda06d18ac606267c40c04e41b9947729bf8b9efe74bd4e82b61a5f26a510b9f"
 dependencies = [
  "arrayvec",
 ]
@@ -202,14 +186,10 @@ name = "psbt-v2"
 version = "0.2.0"
 dependencies = [
  "anyhow",
- "bincode",
  "bitcoin",
- "hex-conservative",
  "miniscript",
- "secp256k1",
  "serde",
  "serde_json",
- "serde_test",
 ]
 
 [[package]]
@@ -319,15 +299,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_test"
-version = "1.0.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "482765e11e55174e2d74a611674d09ed96712c00e0777e305a0c416dfef5fa40"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "syn"
 version = "2.0.46"

diff --git a/Cargo-recent.lock b/Cargo-recent.lock
@@ -36,20 +36,11 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d965446196e3b7decd44aa7ee49e31d630118f90ef12f97900f262eb915c951d"
 
-[[package]]
-name = "bincode"
-version = "1.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "bitcoin"
-version = "0.32.7"
+version = "0.32.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fda569d741b895131a88ee5589a467e73e9c4718e958ac9308e4f7dc44b6945"
+checksum = "1e499f9fc0407f50fe98af744ab44fa67d409f76b6772e1689ec8485eb0c0f66"
 dependencies = [
  "base58ck",
  "base64",
@@ -134,9 +125,9 @@ dependencies = [
 
 [[package]]
 name = "hex-conservative"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5313b072ce3c597065a808dbf612c4c8e8590bdbf8b579508bf7a762c5eae6cd"
+checksum = "fda06d18ac606267c40c04e41b9947729bf8b9efe74bd4e82b61a5f26a510b9f"
 dependencies = [
  "arrayvec",
 ]
@@ -198,14 +189,10 @@ name = "psbt-v2"
 version = "0.2.0"
 dependencies = [
  "anyhow",
- "bincode",
  "bitcoin",
- "hex-conservative",
  "miniscript",
- "secp256k1",
  "serde",
  "serde_json",
- "serde_test",
 ]
 
 [[package]]
@@ -306,15 +293,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_test"
-version = "1.0.177"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f901ee573cab6b3060453d2d5f0bae4e6d628c23c0a962ff9b5f1d7c8d4f1ed"
-dependencies = [
- "serde",
-]
-
 [[package]]
 name = "shlex"
 version = "1.3.0"

diff --git a/Cargo.toml b/Cargo.toml
@@ -20,30 +20,23 @@ rustdoc-args = ["--cfg", "docsrs"]
 default = ["std"]
 std = ["bitcoin/std", "miniscript?/std"]
 rand = ["std", "bitcoin/rand-std"]
-serde = ["dep:actual-serde", "bitcoin/serde"]
+serde = ["dep:serde", "bitcoin/serde"]
 base64 = ["bitcoin/base64"]
 miniscript = ["dep:miniscript", "miniscript?/no-std"]
 
 [dependencies]
-bitcoin = { version = "0.32.6", default-features = false }
-# Workaround for minimal version resolution bug in bitcoin 0.32.x series.
-# bitcoin 0.32.6 depends on hex-conservative 0.2.0, which incorrectly specifies
-# arrayvec = "0.7" instead of "0.7.2". Is fixed in hex-conservative 0.2.1.
-hex-conservative = { version = "0.2.1", default-features = false }
+bitcoin = { version = "0.32.8", default-features = false }
 
 miniscript = { version = "12.2.0", default-features = false, optional = true }
-actual-serde = { package = "serde", version = "1.0.195", default-features = false, features = ["derive", "alloc"], optional = true }
+serde = { version = "1.0.195", default-features = false, features = ["derive", "alloc"], optional = true }
 
 [dev-dependencies]
 anyhow = "1.0.86"
 serde_json = "1.0.68"
-serde_test = "1.0.19"
-bincode = "1.3.1"
-secp256k1 = { version = "0.29", features = ["rand-std", "global-context"] }
 
 [[example]]
 name = "v0"
-required-features = ["std"]
+required-features = ["std", "rand"]
 
 [[example]]
 name = "v2"

diff --git a/examples/v0.rs b/examples/v0.rs
@@ -13,7 +13,7 @@ use psbt_v2::bitcoin::bip32::{DerivationPath, Fingerprint};
 use psbt_v2::bitcoin::hashes::Hash as _;
 use psbt_v2::bitcoin::locktime::absolute;
 use psbt_v2::bitcoin::opcodes::all::OP_CHECKMULTISIG;
-use psbt_v2::bitcoin::secp256k1::{self, rand, SECP256K1};
+use psbt_v2::bitcoin::secp256k1::{self, rand, Secp256k1};
 use psbt_v2::bitcoin::{
     script, transaction, Address, Amount, CompressedPublicKey, Network, OutPoint, PublicKey,
     ScriptBuf, Sequence, Transaction, TxIn, TxOut, Txid, Witness,
@@ -230,7 +230,8 @@ impl Entity {
 
         let mut keys = BTreeMap::new();
         keys.insert(pk, sk);
-        psbt.sign(&keys, SECP256K1).expect("failed to sign psbt");
+        let secp = Secp256k1::new();
+        psbt.sign(&keys, &secp).expect("failed to sign psbt");
 
         Ok(psbt)
     }
@@ -240,7 +241,8 @@ impl Entity {
 ///
 /// In a real application these would come from actual secrets.
 fn random_keys() -> (secp256k1::SecretKey, secp256k1::PublicKey) {
+    let secp = Secp256k1::new();
     let sk = secp256k1::SecretKey::new(&mut rand::thread_rng());
-    let pk = sk.public_key(SECP256K1);
+    let pk = sk.public_key(&secp);
     (sk, pk)
 }
diff --git a/examples/v2.rs b/examples/v2.rs
@@ -14,7 +14,7 @@ use psbt_v2::bitcoin::bip32::{DerivationPath, KeySource, Xpriv, Xpub};
 use psbt_v2::bitcoin::hashes::Hash as _;
 use psbt_v2::bitcoin::locktime::absolute;
 use psbt_v2::bitcoin::opcodes::all::OP_CHECKMULTISIG;
-use psbt_v2::bitcoin::secp256k1::{self, SECP256K1};
+use psbt_v2::bitcoin::secp256k1::{self, Secp256k1};
 use psbt_v2::bitcoin::{
     script, Address, Amount, CompressedPublicKey, Network, OutPoint, PublicKey, ScriptBuf,
     Sequence, TxOut, Txid,
@@ -241,17 +241,18 @@ impl Default for Bob {
 /// An entity that can take on one of the PSBT roles.
 pub struct Entity {
     master: Xpriv,
+    secp: Secp256k1<secp256k1::All>,
 }
 
 impl Entity {
     /// Creates a new entity with random keys.
-    pub fn new(master: Xpriv) -> Self { Self { master } }
+    pub fn new(master: Xpriv) -> Self { Self { master, secp: Secp256k1::new() } }
 
     /// Returns the pubkey for this entity at `derivation_path`.
     fn public_key(&self, derivation_path: &str) -> anyhow::Result<bitcoin::PublicKey> {
         let path = DerivationPath::from_str(derivation_path)?;
-        let xpriv = self.master.derive_priv(SECP256K1, &path)?;
-        let pk = Xpub::from_priv(SECP256K1, &xpriv);
+        let xpriv = self.master.derive_priv(&self.secp, &path)?;
+        let pk = Xpub::from_priv(&self.secp, &xpriv);
         Ok(pk.to_pub().into())
     }
 
@@ -270,20 +271,20 @@ impl Entity {
         derivation_path: &str,
     ) -> anyhow::Result<(secp256k1::PublicKey, KeySource)> {
         let path = DerivationPath::from_str(derivation_path)?;
-        let xpriv = self.master.derive_priv(SECP256K1, &path).expect("failed to derive xpriv");
-        let fingerprint = xpriv.fingerprint(SECP256K1);
+        let xpriv = self.master.derive_priv(&self.secp, &path).expect("failed to derive xpriv");
+        let fingerprint = xpriv.fingerprint(&self.secp);
         let sk = xpriv.to_priv();
-        Ok((sk.public_key(SECP256K1).inner, (fingerprint, path)))
+        Ok((sk.public_key(&self.secp).inner, (fingerprint, path)))
     }
 
     /// Signs any ECDSA inputs for which we have keys.
     pub fn sign_ecdsa(&self, psbt: Psbt, derivation_path: &str) -> anyhow::Result<Psbt> {
         // Usually we'd have to check this was our input and provide the correct key.
         let path = DerivationPath::from_str(derivation_path)?;
-        let xpriv = self.master.derive_priv(SECP256K1, &path)?;
+        let xpriv = self.master.derive_priv(&self.secp, &path)?;
 
         let signer = Signer::new(psbt)?;
-        match signer.sign(&xpriv, SECP256K1) {
+        match signer.sign(&xpriv, &self.secp) {
             Ok((psbt, _signing_keys)) => Ok(psbt),
             Err(e) => panic!("signing failed: {:?}", e),
         }

diff --git a/rbmt.toml b/rbmt.toml
@@ -4,7 +4,7 @@
 # Examples to run with specific features enabled.
 # Format: "example_name:feature1 feature2"
 examples = [
-    "v0:std",
+    "v0:std rand",
     "v2:std",
     "v2-separate-creator-constructor:std",
 ]

diff --git a/src/lib.rs b/src/lib.rs
@@ -19,7 +19,7 @@ extern crate alloc;
 
 #[cfg(feature = "serde")]
 #[macro_use]
-extern crate actual_serde as serde;
+extern crate serde;
 
 /// Re-export of the `rust-bitcoin` crate.
 pub extern crate bitcoin;

diff --git a/src/raw.rs b/src/raw.rs
@@ -28,7 +28,6 @@ use crate::serialize::{Deserialize, Serialize};
 /// - `<keypair> := <key> <value>`
 #[derive(Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Pair {
     /// The key of this key-value pair.
     pub key: Key,
@@ -76,7 +75,6 @@ impl Deserialize for Pair {
 /// deserializing.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Key {
     /// The `keytype` of this PSBT map key (`keytype`).
     pub type_value: u8,
@@ -138,7 +136,6 @@ pub type ProprietaryType = u8;
 /// structure according to BIP 174.
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProprietaryKey<Subtype = ProprietaryType>
 where
     Subtype: Copy + From<u8> + Into<u8>,

diff --git a/src/serde_utils.rs b/src/serde_utils.rs
@@ -171,15 +171,13 @@ pub mod btreemap_as_seq_byte_values {
 
     /// A custom key-value pair type that serialized the bytes as hex.
     #[derive(Debug, Deserialize)]
-    #[serde(crate = "actual_serde")]
     struct OwnedPair<T>(
         T,
         #[serde(deserialize_with = "crate::serde_utils::hex_bytes::deserialize")] Vec<u8>,
     );
 
     /// A custom key-value pair type that serialized the bytes as hex.
     #[derive(Debug, Serialize)]
-    #[serde(crate = "actual_serde")]
     struct BorrowedPair<'a, T: 'static>(
         &'a T,
         #[serde(serialize_with = "crate::serde_utils::hex_bytes::serialize")] &'a [u8],

diff --git a/src/sighash_type.rs b/src/sighash_type.rs
@@ -14,7 +14,6 @@ use crate::prelude::*;
 /// for converting to/from [`PsbtSighashType`] from/to the desired signature hash type they need.
 #[derive(Copy, Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct PsbtSighashType {
     pub(crate) inner: u32,
 }

diff --git a/src/v0/bitcoin/map/input.rs b/src/v0/bitcoin/map/input.rs
@@ -74,7 +74,6 @@ const PSBT_IN_PROPRIETARY: u8 = 0xFC;
 /// transaction.
 #[derive(Clone, Default, Debug, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Input {
     /// The non-witness transaction this input spends from. Should only be
     /// `Option::Some` for inputs which spend non-segwit outputs or

diff --git a/src/v0/bitcoin/map/output.rs b/src/v0/bitcoin/map/output.rs
@@ -34,7 +34,6 @@ const PSBT_OUT_PROPRIETARY: u8 = 0xFC;
 /// transaction.
 #[derive(Clone, Default, Debug, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Output {
     /// The redeem script for this output.
     pub redeem_script: Option<ScriptBuf>,

diff --git a/src/v0/bitcoin/mod.rs b/src/v0/bitcoin/mod.rs
@@ -40,7 +40,6 @@ pub use self::{
 /// A Partially Signed Transaction.
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Psbt {
     /// The unsigned transaction, scriptSigs and witnesses for each input must be empty.
     pub unsigned_tx: Transaction,

diff --git a/src/v0/bitcoin/raw.rs b/src/v0/bitcoin/raw.rs
@@ -21,7 +21,6 @@ use crate::v0::bitcoin::Error;
 /// A PSBT key in its raw byte form.
 #[derive(Debug, PartialEq, Hash, Eq, Clone, Ord, PartialOrd)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Key {
     /// The type of this PSBT key.
     pub type_value: u8,
@@ -35,7 +34,6 @@ pub struct Key {
 /// `<keypair> := <key> <value>`
 #[derive(Debug, PartialEq, Eq)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct Pair {
     /// The key of this key-value pair.
     pub key: Key,
@@ -52,7 +50,6 @@ pub type ProprietaryType = u8;
 /// structure according to BIP 174.
 #[derive(Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(crate = "actual_serde"))]
 pub struct ProprietaryKey<Subtype = ProprietaryType>
 where
     Subtype: Copy + From<u8> + Into<u8>,

diff --git a/src/v0/miniscript/finalizer.rs b/src/v0/miniscript/finalizer.rs
@@ -13,9 +13,7 @@ use core::mem;
 
 use bitcoin::hashes::hash160;
 use bitcoin::key::XOnlyPublicKey;
-#[cfg(not(test))] // https://github.com/rust-lang/rust/issues/121684
-use bitcoin::secp256k1;
-use bitcoin::secp256k1::{Secp256k1};
+use bitcoin::secp256k1::{self, Secp256k1};
 use bitcoin::sighash::Prevouts;
 use bitcoin::taproot::LeafVersion;
 use bitcoin::{PublicKey, Script, ScriptBuf, TxOut, Witness};