Merge rust-bitcoin/rust-miniscript#822: use hex-conservative 1.0 everywhere for decoding

heap-coder · heap-coder · commit 01eea4fa83ed · 2025-08-06T14:15:30.000Z
a1fa898f9f164baee2eca787b06fd89ea10f880d use hex-conservative 1.0 everywhere for decoding (Andrew Poelstra)

Pull request description:

  It turns out we only ever use do decoding of fixed test vectors. It would be nice to have a hex! macro for this. Eventually.
  
  In some cases we were able to use inherent methods on bitcoin types -- for example ScriptBuf::from_hex or deserialize_hex.


ACKs for top commit:
  tcharding:
    ACK a1fa898f9f164baee2eca787b06fd89ea10f880d


Tree-SHA512: 234fb4974e86b6b72d3f0aaefbe7f1ea73cfd90c0152c163d3f0b46e94d50f3e784f5499e00b058736b242b1c0dde39b41d5a2583319bf9c580a0db84dc24237
diff --git a/Cargo-minimal.lock b/Cargo-minimal.lock
@@ -52,7 +52,7 @@ dependencies = [
  "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes",
- "hex-conservative",
+ "hex-conservative 0.2.1",
  "hex_lit",
  "secp256k1",
  "serde",
@@ -90,7 +90,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb18c03d0db0247e147a21a6faafd5a7eb851c743db062de72018b6b7e8e4d16"
 dependencies = [
  "bitcoin-io",
- "hex-conservative",
+ "hex-conservative 0.2.1",
  "serde",
 ]
 
@@ -136,6 +136,12 @@ dependencies = [
  "arrayvec",
 ]
 
+[[package]]
+name = "hex-conservative"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee770c000993d17c185713463d5ebfbd1af9afae4c17cc295640104383bfbf0"
+
 [[package]]
 name = "hex_lit"
 version = "0.1.1"
@@ -196,6 +202,7 @@ version = "13.0.0"
 dependencies = [
  "bech32",
  "bitcoin",
+ "hex-conservative 1.0.0",
  "secp256k1",
  "serde",
  "serde_test",
diff --git a/Cargo-recent.lock b/Cargo-recent.lock
@@ -52,7 +52,7 @@ dependencies = [
  "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes",
- "hex-conservative",
+ "hex-conservative 0.2.1",
  "hex_lit",
  "secp256k1",
  "serde",
@@ -90,7 +90,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bb18c03d0db0247e147a21a6faafd5a7eb851c743db062de72018b6b7e8e4d16"
 dependencies = [
  "bitcoin-io",
- "hex-conservative",
+ "hex-conservative 0.2.1",
  "serde",
 ]
 
@@ -136,6 +136,12 @@ dependencies = [
  "arrayvec",
 ]
 
+[[package]]
+name = "hex-conservative"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ee770c000993d17c185713463d5ebfbd1af9afae4c17cc295640104383bfbf0"
+
 [[package]]
 name = "hex_lit"
 version = "0.1.1"
@@ -196,6 +202,7 @@ version = "13.0.0"
 dependencies = [
  "bech32",
  "bitcoin",
+ "hex-conservative 1.0.0",
  "secp256k1",
  "serde",
  "serde_test",
diff --git a/Cargo.toml b/Cargo.toml
@@ -24,6 +24,7 @@ base64 = ["bitcoin/base64"]
 [dependencies]
 bech32 = { version = "0.11.0", default-features = false, features = ["alloc"] }
 bitcoin = { version = "0.32.0", default-features = false }
+hex = { package = "hex-conservative", default-features = false, features = ["alloc"], version = "1.0.0" }
 
 serde = { version = "1.0.103", optional = true }
 
diff --git a/examples/psbt_sign_finalize.rs b/examples/psbt_sign_finalize.rs
@@ -3,8 +3,7 @@
 use std::collections::BTreeMap;
 use std::str::FromStr;
 
-use miniscript::bitcoin::consensus::encode::deserialize;
-use miniscript::bitcoin::hashes::hex::FromHex;
+use miniscript::bitcoin::consensus::encode::deserialize_hex;
 use miniscript::bitcoin::psbt::{self, Psbt};
 use miniscript::bitcoin::sighash::SighashCache;
 //use miniscript::bitcoin::secp256k1; // https://github.com/rust-lang/rust/issues/121684
@@ -71,7 +70,7 @@ fn main() {
     };
 
     let hex_tx = "020000000001018ff27041f3d738f5f84fd5ee62f1c5b36afebfb15f6da0c9d1382ddd0eaaa23c0000000000feffffff02b3884703010000001600142ca3b4e53f17991582d47b15a053b3201891df5200e1f50500000000220020c0ebf552acd2a6f5dee4e067daaef17b3521e283aeaa44a475278617e3d2238a0247304402207b820860a9d425833f729775880b0ed59dd12b64b9a3d1ab677e27e4d6b370700220576003163f8420fe0b9dc8df726cff22cbc191104a2d4ae4f9dfedb087fcec72012103817e1da42a7701df4db94db8576f0e3605f3ab3701608b7e56f92321e4d8999100000000";
-    let depo_tx: Transaction = deserialize(&Vec::<u8>::from_hex(hex_tx).unwrap()).unwrap();
+    let depo_tx: Transaction = deserialize_hex(hex_tx).unwrap();
 
     let receiver = Address::from_str("bcrt1qsdks5za4t6sevaph6tz9ddfjzvhkdkxe9tfrcy")
         .unwrap()
diff --git a/fuzz/fuzz_targets/miniscript_satisfy.rs b/fuzz/fuzz_targets/miniscript_satisfy.rs
@@ -166,27 +166,11 @@ fn main() {
 
 #[cfg(test)]
 mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
+    use miniscript::hex;
 
     #[test]
     fn duplicate_crash() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("", &mut a);
-        super::do_test(&a);
+        let v = hex::decode_to_vec("abcd").unwrap();
+        super::do_test(&v);
     }
 }
diff --git a/fuzz/fuzz_targets/roundtrip_concrete.rs b/fuzz/fuzz_targets/roundtrip_concrete.rs
@@ -30,27 +30,11 @@ fn main() {
 
 #[cfg(test)]
 mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
+    use miniscript::hex;
 
     #[test]
     fn duplicate_crash() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("048531e80700ae6400670000af5168", &mut a);
-        super::do_test(&a);
+        let v = hex::decode_to_vec("abcd").unwrap();
+        super::do_test(&v);
     }
 }
diff --git a/fuzz/fuzz_targets/roundtrip_descriptor.rs b/fuzz/fuzz_targets/roundtrip_descriptor.rs
@@ -25,27 +25,11 @@ fn main() {
 
 #[cfg(test)]
 mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
+    use miniscript::hex;
 
     #[test]
-    fn duplicate_crash3() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("747228726970656d616e645f6e5b5c79647228726970656d616e645f6e5b5c7964646464646464646464646464646464646464646464646464646b5f6872702c29", &mut a);
-        super::do_test(&a);
+    fn duplicate_crash() {
+        let v = hex::decode_to_vec("abcd").unwrap();
+        super::do_test(&v);
     }
 }
diff --git a/fuzz/fuzz_targets/roundtrip_miniscript_script.rs b/fuzz/fuzz_targets/roundtrip_miniscript_script.rs
@@ -25,27 +25,11 @@ fn main() {
 
 #[cfg(test)]
 mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
+    use miniscript::hex;
 
     #[test]
-    fn duplicate_crash3() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("1479002d00000020323731363342740000004000000000000000000000000000000000000063630004636363639c00000000000000000000", &mut a);
-        super::do_test(&a);
+    fn duplicate_crash() {
+        let v = hex::decode_to_vec("abcd").unwrap();
+        super::do_test(&v);
     }
 }
diff --git a/fuzz/fuzz_targets/roundtrip_miniscript_str.rs b/fuzz/fuzz_targets/roundtrip_miniscript_str.rs
@@ -30,27 +30,11 @@ fn main() {
 
 #[cfg(test)]
 mod tests {
-    fn extend_vec_from_hex(hex: &str, out: &mut Vec<u8>) {
-        let mut b = 0;
-        for (idx, c) in hex.as_bytes().iter().enumerate() {
-            b <<= 4;
-            match *c {
-                b'A'..=b'F' => b |= c - b'A' + 10,
-                b'a'..=b'f' => b |= c - b'a' + 10,
-                b'0'..=b'9' => b |= c - b'0',
-                _ => panic!("Bad hex"),
-            }
-            if (idx & 1) == 1 {
-                out.push(b);
-                b = 0;
-            }
-        }
-    }
+    use miniscript::hex;
 
     #[test]
     fn duplicate_crash() {
-        let mut a = Vec::new();
-        extend_vec_from_hex("1479002d00000020323731363342740000004000000000000000000000000000000000000063630004636363639c00000000000000000000", &mut a);
-        super::do_test(&a);
+        let v = hex::decode_to_vec("abcd").unwrap();
+        super::do_test(&v);
     }
 }
diff --git a/src/descriptor/mod.rs b/src/descriptor/mod.rs
@@ -1115,7 +1115,6 @@ mod tests {
     use bitcoin::blockdata::opcodes::all::{OP_CLTV, OP_CSV};
     use bitcoin::blockdata::script::Instruction;
     use bitcoin::blockdata::{opcodes, script};
-    use bitcoin::hashes::hex::FromHex;
     use bitcoin::hashes::Hash;
     use bitcoin::script::PushBytes;
     use bitcoin::sighash::EcdsaSighashType;
@@ -1716,7 +1715,7 @@ mod tests {
         .unwrap();
         assert_eq!(
             *descriptor.script_code().unwrap().as_bytes(),
-            Vec::<u8>::from_hex("76a9141d0f172a0ecb48aee1be1f2687d2963ae33f71a188ac").unwrap()[..]
+            hex::decode_to_vec("76a9141d0f172a0ecb48aee1be1f2687d2963ae33f71a188ac").unwrap()[..]
         );
 
         // P2SH-P2WPKH (from bip143 test vectors)
@@ -1726,7 +1725,7 @@ mod tests {
         .unwrap();
         assert_eq!(
             *descriptor.script_code().unwrap().as_bytes(),
-            Vec::<u8>::from_hex("76a91479091972186c449eb1ded22b78e40d009bdf008988ac").unwrap()[..]
+            hex::decode_to_vec("76a91479091972186c449eb1ded22b78e40d009bdf008988ac").unwrap()[..]
         );
 
         // P2WSH (from bitcoind's `createmultisig`)
@@ -1738,7 +1737,7 @@ mod tests {
             *descriptor
                 .script_code().unwrap()
                 .as_bytes(),
-            Vec::<u8>::from_hex("522103789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd2103dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a6162652ae").unwrap()[..]
+            hex::decode_to_vec("522103789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd2103dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a6162652ae").unwrap()[..]
         );
 
         // P2SH-P2WSH (from bitcoind's `createmultisig`)
@@ -1747,7 +1746,7 @@ mod tests {
             *descriptor
                 .script_code().unwrap()
                 .as_bytes(),
-            Vec::<u8>::from_hex("522103789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd2103dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a6162652ae")
+            hex::decode_to_vec("522103789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd2103dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a6162652ae")
                 .unwrap()[..]
         );
     }
diff --git a/src/interpreter/inner.rs b/src/interpreter/inner.rs
@@ -398,9 +398,9 @@ mod tests {
     use core::str::FromStr;
 
     use bitcoin::blockdata::script;
-    use bitcoin::hashes::hex::FromHex;
     use bitcoin::script::PushBytes;
     use bitcoin::ScriptBuf;
+    use hex;
 
     use super::*;
 
@@ -422,7 +422,7 @@ mod tests {
     impl KeyTestData {
         fn from_key(key: bitcoin::PublicKey) -> KeyTestData {
             // what a funny looking signature..
-            let dummy_sig_vec = Vec::from_hex(
+            let dummy_sig_vec = hex::decode_to_vec(
                 "\
                 302e02153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c63\
                     02153b78ce563f89a0ed9414f5aa28ad0d96d6795f9c65\
diff --git a/src/lib.rs b/src/lib.rs
@@ -89,7 +89,7 @@ compile_error!(
     "rust-miniscript currently only supports architectures with pointers wider than 16 bits"
 );
 
-pub use bitcoin;
+pub use {bitcoin, hex};
 
 #[cfg(not(feature = "std"))]
 #[macro_use]
@@ -691,10 +691,7 @@ fn push_opcode_size(script_size: usize) -> usize {
 
 /// Helper function used by tests
 #[cfg(test)]
-fn hex_script(s: &str) -> bitcoin::ScriptBuf {
-    let v: Vec<u8> = bitcoin::hashes::hex::FromHex::from_hex(s).unwrap();
-    bitcoin::ScriptBuf::from(v)
-}
+fn hex_script(s: &str) -> bitcoin::ScriptBuf { bitcoin::ScriptBuf::from_hex(s).unwrap() }
 
 #[cfg(test)]
 mod tests {
diff --git a/src/miniscript/mod.rs b/src/miniscript/mod.rs
@@ -572,7 +572,6 @@ impl<Ctx: ScriptContext> Miniscript<Ctx::Key, Ctx> {
     /// ```rust
     /// use miniscript::{Miniscript, Segwitv0, Tap};
     /// use miniscript::bitcoin::secp256k1::XOnlyPublicKey;
-    /// use miniscript::bitcoin::hashes::hex::FromHex;
     ///
     /// type Segwitv0Script = Miniscript<bitcoin::PublicKey, Segwitv0>;
     /// type TapScript = Miniscript<XOnlyPublicKey, Tap>;
diff --git a/src/psbt/finalizer.rs b/src/psbt/finalizer.rs
diff --git a/src/psbt/mod.rs b/src/psbt/mod.rs
diff --git a/tests/bip-174.rs b/tests/bip-174.rs
