Use da private key in script building (#1838)

crates/bitcoin-da/Cargo.toml

@@ -30,9 +30,8 @@ jsonrpsee = { workspace = true, optional = true }
 k256 = { workspace = true }
 metrics = { workspace = true, optional = true }
 pin-project = { workspace = true, optional = true, features = [] }
-rand = { workspace = true }
 reqwest = { workspace = true, optional = true }
-secp256k1 = { workspace = true, optional = true }
+secp256k1 = { workspace = true, optional = true, features = ["rand-std"] }
 serde = { workspace = true }
 serde_json = { workspace = true, features = ["raw_value"] }
 thiserror = { workspace = true }
@@ -47,6 +46,7 @@ bitcoincore-rpc = { workspace = true, optional = true }
 [dev-dependencies]
 bitcoin-da = { path = ".", features = ["native"] }
 citrea-e2e = { workspace = true }
+rand = { workspace = true }
 
 [features]
 default = []

crates/bitcoin-da/src/helpers/builders/batch_proof_namespace.rs

@@ -96,7 +96,7 @@ pub fn create_batchproof_type_0(
         "The body of a serialized sequencer commitment exceeds 520 bytes"
     );
     // Create reveal key
-    let key_pair = UntweakedKeypair::new(SECP256K1, &mut rand::thread_rng());
+    let key_pair = UntweakedKeypair::from_secret_key(SECP256K1, da_private_key);
     let (public_key, _parity) = XOnlyPublicKey::from_keypair(&key_pair);
 
     let kind = TransactionKindBatchProof::SequencerCommitment;

crates/bitcoin-da/src/helpers/builders/light_client_proof_namespace.rs

@@ -174,7 +174,7 @@ pub fn create_inscription_type_0(
     reveal_tx_prefix: &[u8],
 ) -> Result<LightClientTxs, anyhow::Error> {
     // Create reveal key
-    let key_pair = UntweakedKeypair::new(SECP256K1, &mut rand::thread_rng());
+    let key_pair = UntweakedKeypair::from_secret_key(SECP256K1, da_private_key);
     let (public_key, _parity) = XOnlyPublicKey::from_keypair(&key_pair);
 
     let kind = TransactionKindLightClient::Complete;
@@ -335,7 +335,7 @@ pub fn create_inscription_type_1(
     reveal_tx_prefix: &[u8],
 ) -> Result<LightClientTxs, anyhow::Error> {
     // Create reveal key
-    let key_pair = UntweakedKeypair::new(SECP256K1, &mut rand::thread_rng());
+    let key_pair = UntweakedKeypair::from_secret_key(SECP256K1, da_private_key);
     let (public_key, _parity) = XOnlyPublicKey::from_keypair(&key_pair);
 
     let mut commit_chunks: Vec<Transaction> = vec![];
@@ -676,7 +676,7 @@ pub fn create_inscription_type_2(
     reveal_tx_prefix: &[u8],
 ) -> Result<LightClientTxs, anyhow::Error> {
     // Create reveal key
-    let key_pair = UntweakedKeypair::new(SECP256K1, &mut rand::thread_rng());
+    let key_pair = UntweakedKeypair::from_secret_key(SECP256K1, da_private_key);
     let (public_key, _parity) = XOnlyPublicKey::from_keypair(&key_pair);
 
     let kind = TransactionKindLightClient::BatchProofMethodId;

crates/bitcoin-da/src/helpers/builders/mod.rs

@@ -290,11 +290,10 @@ fn build_witness(
         .expect("Cannot create hash for signature");
 
     // sign reveal tx data
-    let signature = secp256k1.sign_schnorr_with_rng(
+    let signature = secp256k1.sign_schnorr(
         &Message::from_digest_slice(signature_hash.as_byte_array())
             .expect("should be cryptographically secure hash"),
         key_pair,
-        &mut rand::thread_rng(),
     );
 
     // add signature to witness and finalize reveal tx
@@ -326,11 +325,10 @@ fn update_witness(
         .expect("Cannot create hash for signature");
 
     // sign reveal tx data
-    let signature = secp256k1.sign_schnorr_with_rng(
+    let signature = secp256k1.sign_schnorr(
         &Message::from_digest_slice(signature_hash.as_byte_array())
             .expect("should be cryptographically secure hash"),
         key_pair,
-        &mut rand::thread_rng(),
     );
 
     // add signature to witness and finalize reveal tx