Remove entropy slice

crates/bdk/src/wallet/signer.rs

@@ -471,7 +471,6 @@ impl InputSigner for SignerWrapper<PrivateKey> {
                         hash,
                         hash_ty,
                         secp,
-                        sign_options.aux_rand,
                     );
                 }
             }
@@ -507,7 +506,6 @@ impl InputSigner for SignerWrapper<PrivateKey> {
                         hash,
                         hash_ty,
                         secp,
-                        sign_options.aux_rand,
                     );
                 }
             }
@@ -577,7 +575,6 @@ fn sign_psbt_schnorr(
     hash: TapSighash,
     hash_ty: TapSighashType,
     secp: &SecpCtx,
-    aux_rand: Option<[u8; 32]>,
 ) {
     let keypair = secp256k1::Keypair::from_seckey_slice(secp, secret_key.as_ref()).unwrap();
     let keypair = match leaf_hash {
@@ -588,10 +585,7 @@ fn sign_psbt_schnorr(
     };
 
     let msg = &Message::from(hash);
-    let sig = match aux_rand {
-        Some(rand) => secp.sign_schnorr_with_aux_rand(msg, &keypair, &rand),
-        None => secp.sign_schnorr_no_aux_rand(msg, &keypair),
-    };
+    let sig = secp.sign_schnorr_no_aux_rand(msg, &keypair);
     secp.verify_schnorr(&sig, msg, &XOnlyPublicKey::from_keypair(&keypair).0)
         .expect("invalid or corrupted schnorr signature");
 
@@ -818,13 +812,6 @@ pub struct SignOptions {
     /// or not.
     /// Defaults to `true`, i.e., we always grind ECDSA signature to sign with low r.
     pub allow_grinding: bool,
-
-    /// Add additional entropy to the signature using a random array of bytes.
-    ///
-    /// Defaults to `None`. While recommended, additional entropy is not required.
-    ///
-    /// See [`BIP 340`](https://github.com/bitcoin/bips/blob/master/bip-0340.mediawiki) for more details.
-    pub aux_rand: Option<[u8; 32]>,
 }
 
 /// Customize which taproot script-path leaves the signer should sign.
@@ -854,7 +841,6 @@ impl Default for SignOptions {
             tap_leaves_options: TapLeavesOptions::default(),
             sign_with_tap_internal_key: true,
             allow_grinding: true,
-            aux_rand: None,
         }
     }
 }

crates/bdk/src/wallet/tx_builder.rs

@@ -834,8 +834,8 @@ pub enum TxOrdering {
         /// The custom function to order the inputs of the transaction
         input_ordering: Box<dyn Fn(&TxIn, &TxIn) -> core::cmp::Ordering>,
         /// The custom function to order the outputs of the transaction
-        output_ordering:  Box<dyn Fn(&TxOut, &TxOut) -> core::cmp::Ordering>,
-    }    
+        output_ordering: Box<dyn Fn(&TxOut, &TxOut) -> core::cmp::Ordering>,
+    },
 }
 
 impl TxOrdering {
@@ -855,7 +855,10 @@ impl TxOrdering {
                 tx.output
                     .sort_unstable_by_key(|txout| (txout.value, txout.script_pubkey.clone()));
             }
-            TxOrdering::Custom { input_ordering, output_ordering } => {
+            TxOrdering::Custom {
+                input_ordering,
+                output_ordering,
+            } => {
                 tx.input.sort_unstable_by(input_ordering);
                 tx.output.sort_unstable_by(output_ordering);
             }