feat: add Package support in TransactionScript

CHANGELOG.md

@@ -16,6 +16,8 @@
 - Added shared `ProcedurePolicy` for AuthMultisig ([#2670](https://github.com/0xMiden/protocol/pull/2670)).
 - [BREAKING] Changed `NoteType` encoding from 2 bits to 1 and makes `NoteType::Private` the default ([#2691](https://github.com/0xMiden/miden-base/issues/2691)).
 - Added `BlockNumber::saturating_sub()` ([#2660](https://github.com/0xMiden/protocol/issues/2660)).
+- Added `TransactionScript::from_package()` method to create `TransactionScript` from `miden-mast-package::Package` ([#2779](https://github.com/0xMiden/protocol/pull/2779)).
+
 
 ## 0.14.3 (2026-04-07)
 

crates/miden-protocol/src/errors/mod.rs

@@ -764,6 +764,10 @@ impl PartialBlockchainError {
 pub enum TransactionScriptError {
     #[error("failed to assemble transaction script:\n{}", PrintDiagnostic::new(.0))]
     AssemblyError(Report),
+    #[error("failed to convert package to transaction script:\n{}", PrintDiagnostic::new(.0))]
+    PackageNotProgram(Report),
+    #[error("failed to convert package to transaction script:\n{}", PrintDiagnostic::new(.0))]
+    PackageNotTransactionScript(Report),
 }
 
 // TRANSACTION INPUT ERROR

crates/miden-protocol/src/transaction/tx_args.rs

@@ -2,11 +2,14 @@ use alloc::collections::BTreeMap;
 use alloc::sync::Arc;
 use alloc::vec::Vec;
 
+use miden_assembly::Report;
 use miden_core::mast::MastNodeExt;
 use miden_crypto::merkle::InnerNodeInfo;
+use miden_mast_package::{Package, TargetType};
 
 use super::{Felt, Hasher, Word};
 use crate::account::auth::{PublicKeyCommitment, Signature};
+use crate::errors::TransactionScriptError;
 use crate::note::{NoteId, NoteRecipient};
 use crate::utils::serde::{
     ByteReader,
@@ -308,6 +311,29 @@ impl TransactionScript {
         Self { mast, entrypoint }
     }
 
+    /// Creates a [TransactionScript] from a [`Package`].
+    ///
+    /// The package must be an executable (i.e., its target type must be
+    /// [`TargetType::TransactionScript`](miden_mast_package::TargetType::TransactionScript)).
+    ///
+    /// # Errors
+    /// Returns an error if the package cannot be converted to an executable program.
+    pub fn from_package(package: &Package) -> Result<Self, TransactionScriptError> {
+        let package_kind = package.kind;
+        if !matches!(package_kind, TargetType::TransactionScript) {
+            let err_report = Report::msg(format!(
+                "package's kind is {}, expected TransactionScript",
+                package_kind
+            ));
+            return Err(TransactionScriptError::PackageNotTransactionScript(err_report));
+        };
+
+        let program =
+            package.try_into_program().map_err(TransactionScriptError::PackageNotProgram)?;
+
+        Ok(TransactionScript::new(program))
+    }
+
     // PUBLIC ACCESSORS
     // --------------------------------------------------------------------------------------------