Depend on new chf crate

Cargo.toml

@@ -22,7 +22,7 @@ default = ["std"]
 std = ["alloc", "secp256k1-sys/std"]
 # allow use of Secp256k1::new and related API that requires an allocator
 alloc = ["secp256k1-sys/alloc"]
-hashes-std = ["std", "hashes/std"]
+chf-std = ["std", "chf/std"]
 rand-std = ["std", "rand", "rand/std", "rand/std_rng"]
 recovery = ["secp256k1-sys/recovery"]
 lowmemory = ["secp256k1-sys/lowmemory"]
@@ -40,8 +40,8 @@ secp256k1-sys = { version = "0.10.0", default-features = false, path = "./secp25
 serde = { version = "1.0.103", default-features = false, optional = true }
 
 # You likely only want to enable these if you explicitly do not want to use "std", otherwise enable
-# the respective -std feature e.g., hashes-std
-hashes = { package = "bitcoin_hashes", version = ">= 0.12, <= 0.14", default-features = false, optional = true }
+# the respective -std feature e.g., chf-std
+chf = { package = "chf", version = "0.2.0", default-features = false, optional = true }
 rand = { version = "0.8", default-features = false, optional = true }
 
 [dev-dependencies]
@@ -57,11 +57,11 @@ getrandom = { version = "0.2", features = ["js"] }
 
 [[example]]
 name = "sign_verify_recovery"
-required-features = ["recovery", "hashes-std"]
+required-features = ["recovery", "chf-std"]
 
 [[example]]
 name = "sign_verify"
-required-features = ["hashes-std"]
+required-features = ["chf-std"]
 
 [[example]]
 name = "generate_keys"

contrib/_test.sh

@@ -3,7 +3,7 @@
 set -ex
 
 REPO_DIR=$(git rev-parse --show-toplevel)
-FEATURES="hashes global-context lowmemory rand recovery serde std alloc hashes-std rand-std"
+FEATURES="chf global-context lowmemory rand recovery serde std alloc chf-std rand-std"
 
 cargo --version
 rustc --version
@@ -62,16 +62,16 @@ if [ "$DO_FEATURE_MATRIX" = true ]; then
     fi
 
     # Examples
-    cargo run --locked --example sign_verify --features=hashes-std
-    cargo run --locked --example sign_verify_recovery --features=recovery,hashes-std
+    cargo run --locked --example sign_verify --features=chf-std
+    cargo run --locked --example sign_verify_recovery --features=recovery,chf-std
     cargo run --locked --example generate_keys --features=rand-std
 fi
 
 if [ "$DO_LINT" = true ]
 then
     cargo clippy --locked --all-features --all-targets -- -D warnings
-    cargo clippy --locked --example sign_verify --features=hashes-std -- -D warnings
-    cargo clippy --locked --example sign_verify_recovery --features=recovery,hashes-std -- -D warnings
+    cargo clippy --locked --example sign_verify --features=chf-std -- -D warnings
+    cargo clippy --locked --example sign_verify_recovery --features=recovery,chf-std -- -D warnings
     cargo clippy --locked --example generate_keys --features=rand-std -- -D warnings
 fi
 

examples/sign_verify.rs

@@ -1,7 +1,4 @@
-extern crate hashes;
-extern crate secp256k1;
-
-use hashes::{sha256, Hash};
+use chf::sha256;
 use secp256k1::{ecdsa, Error, Message, PublicKey, Secp256k1, SecretKey, Signing, Verification};
 
 fn verify<C: Verification>(

examples/sign_verify_recovery.rs

@@ -1,7 +1,4 @@
-extern crate hashes;
-extern crate secp256k1;
-
-use hashes::{sha256, Hash};
+use chf::sha256;
 use secp256k1::{ecdsa, Error, Message, PublicKey, Secp256k1, SecretKey, Signing, Verification};
 
 fn recover<C: Verification>(

src/ecdh.rs

@@ -112,7 +112,7 @@ impl AsRef<[u8]> for SharedSecret {
 /// ```
 /// # #[cfg(all(feature = "hashes-std", feature = "rand-std"))] {
 /// # use secp256k1::{ecdh, rand, Secp256k1, PublicKey, SecretKey};
-/// # use secp256k1::hashes::{Hash, sha512};
+/// # use secp256k1::hashes::sha512;
 ///
 /// let s = Secp256k1::new();
 /// let (sk1, pk1) = s.generate_keypair(&mut rand::thread_rng());
@@ -227,7 +227,7 @@ mod tests {
     #[cfg(not(secp256k1_fuzz))]
     #[cfg(all(feature = "hashes-std", feature = "rand-std"))]
     fn hashes_and_sys_generate_same_secret() {
-        use hashes::{sha256, Hash, HashEngine};
+        use hashes::{sha256, HashEngine};
 
         use crate::ecdh::shared_secret_point;