Dependabot/cargo/secp256k1 0.21 (#589)

* Update secp256k1 requirement from 0.20 to 0.21

Updates the requirements on [secp256k1](https://github.com/rust-bitcoin/rust-secp256k1) to permit the latest version.
- [Release notes](https://github.com/rust-bitcoin/rust-secp256k1/releases)
- [Changelog](https://github.com/rust-bitcoin/rust-secp256k1/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-bitcoin/rust-secp256k1/commits)

---
updated-dependencies:
- dependency-name: secp256k1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* Remove usage of deprecated functions in secp256k1

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Cargo.toml

@@ -29,7 +29,7 @@ serde_json = "1.0.39"
 tiny-keccak = { version = "2.0.1", features = ["keccak"] }
 pin-project = "1.0"
 # Optional deps
-secp256k1 = { version = "0.20", features = ["recovery"], optional = true }
+secp256k1 = { version = "0.21", features = ["recovery"], optional = true }
 once_cell = { version = "1.8.0", optional = true }
 
 ## HTTP

src/signing.rs

@@ -33,7 +33,7 @@ mod feature_gated {
     use once_cell::sync::Lazy;
     pub(crate) use secp256k1::SecretKey;
     use secp256k1::{
-        recovery::{RecoverableSignature, RecoveryId},
+        ecdsa::{RecoverableSignature, RecoveryId},
         All, Message, PublicKey, Secp256k1,
     };
     use std::ops::Deref;
@@ -101,7 +101,7 @@ mod feature_gated {
     impl<T: Deref<Target = SecretKey>> Key for T {
         fn sign(&self, message: &[u8], chain_id: Option<u64>) -> Result<Signature, SigningError> {
             let message = Message::from_slice(&message).map_err(|_| SigningError::InvalidMessage)?;
-            let (recovery_id, signature) = CONTEXT.sign_recoverable(&message, self).serialize_compact();
+            let (recovery_id, signature) = CONTEXT.sign_ecdsa_recoverable(&message, self).serialize_compact();
 
             let standard_v = recovery_id.to_i32() as u64;
             let v = if let Some(chain_id) = chain_id {
@@ -119,7 +119,7 @@ mod feature_gated {
 
         fn sign_message(&self, message: &[u8]) -> Result<Signature, SigningError> {
             let message = Message::from_slice(&message).map_err(|_| SigningError::InvalidMessage)?;
-            let (recovery_id, signature) = CONTEXT.sign_recoverable(&message, self).serialize_compact();
+            let (recovery_id, signature) = CONTEXT.sign_ecdsa_recoverable(&message, self).serialize_compact();
 
             let v = recovery_id.to_i32() as u64;
             let r = H256::from_slice(&signature[..32]);
@@ -142,7 +142,7 @@ mod feature_gated {
         let signature =
             RecoverableSignature::from_compact(&signature, recovery_id).map_err(|_| RecoveryError::InvalidSignature)?;
         let public_key = CONTEXT
-            .recover(&message, &signature)
+            .recover_ecdsa(&message, &signature)
             .map_err(|_| RecoveryError::InvalidSignature)?;
 
         Ok(public_key_address(&public_key))