Drop all support for anyhow, migrate to thiserror 2

Author: wolfmcnally

Cargo.toml

@@ -22,8 +22,7 @@ crc32fast = "^1.3.2"
 chacha20poly1305 = "^0.10.1"
 secp256k1 = "^0.30.0"
 x25519-dalek = { version = "2.0.0-rc.2", features = ["static_secrets"] }
-thiserror = "^1.0.48"
-anyhow = "^1.0.0"
+thiserror = "^2.0"
 hex = "^0.4.3"
 ed25519-dalek = { version = "2.1.1", features = ["rand_core"] }
 scrypt = { version = "0.11.0", default-features = false }

src/error.rs

@@ -0,0 +1,16 @@
+use chacha20poly1305::aead::Error as AeadError;
+use thiserror::Error;
+
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("AEAD error")]
+    Aead(AeadError),
+}
+
+impl From<AeadError> for Error {
+    fn from(error: AeadError) -> Self {
+        Error::Aead(error)
+    }
+}
+
+pub type Result<T> = std::result::Result<T, Error>;

src/lib.rs

@@ -27,6 +27,9 @@
 //! bc-crypto = "0.9.0"
 //! ```
 
+pub mod error;
+pub use error::{Error, Result};
+
 /// The `hash` module contains functions for hashing data.
 pub mod hash;
 pub use hash::{

src/symmetric_encryption.rs

@@ -1,5 +1,5 @@
-use anyhow::{anyhow, Result};
 use chacha20poly1305::{ChaCha20Poly1305, KeyInit, AeadInPlace};
+use crate::Result;
 
 pub const SYMMETRIC_KEY_SIZE: usize = 32;
 pub const SYMMETRIC_NONCE_SIZE: usize = 12;
@@ -49,7 +49,7 @@ pub fn aead_chacha20_poly1305_decrypt_with_aad<D1, D2>(
 {
     let cipher = ChaCha20Poly1305::new(key.into());
     let mut buffer = ciphertext.as_ref().to_vec();
-    cipher.decrypt_in_place_detached(nonce.into(), aad.as_ref(), &mut buffer, auth.into()).map_err(|_| anyhow!("Decrypt failed"))?;
+    cipher.decrypt_in_place_detached(nonce.into(), aad.as_ref(), &mut buffer, auth.into())?;
     Ok(buffer)
 }