feat: add From<Transaction> and From<&Transaction>

src/curr/mod.rs

@@ -6,6 +6,7 @@ mod str;
 
 mod scval_conversions;
 pub use scval_conversions::*;
+mod transaction_conversions;
 
 mod scval_validations;
 pub use scval_validations::*;

src/curr/transaction_conversions.rs

@@ -0,0 +1,34 @@
+use super::{
+    FeeBumpTransaction, FeeBumpTransactionEnvelope, Transaction, TransactionEnvelope,
+    TransactionV1Envelope, VecM,
+};
+
+impl From<Transaction> for TransactionEnvelope {
+    fn from(tx: Transaction) -> Self {
+        TransactionEnvelope::Tx(TransactionV1Envelope {
+            tx,
+            signatures: VecM::default(),
+        })
+    }
+}
+
+impl From<FeeBumpTransaction> for TransactionEnvelope {
+    fn from(tx: FeeBumpTransaction) -> Self {
+        TransactionEnvelope::TxFeeBump(FeeBumpTransactionEnvelope {
+            tx,
+            signatures: VecM::default(),
+        })
+    }
+}
+
+impl From<&FeeBumpTransaction> for TransactionEnvelope {
+    fn from(tx: &FeeBumpTransaction) -> Self {
+        tx.clone().into()
+    }
+}
+
+impl From<&Transaction> for TransactionEnvelope {
+    fn from(tx: &Transaction) -> Self {
+        tx.clone().into()
+    }
+}

src/next/mod.rs

@@ -6,6 +6,7 @@ mod str;
 
 mod scval_conversions;
 pub use scval_conversions::*;
+mod transaction_conversions;
 
 mod scval_validations;
 pub use scval_validations::*;

src/next/transaction_conversions.rs

@@ -0,0 +1,34 @@
+use super::{
+    FeeBumpTransaction, FeeBumpTransactionEnvelope, Transaction, TransactionEnvelope,
+    TransactionV1Envelope, VecM,
+};
+
+impl From<Transaction> for TransactionEnvelope {
+    fn from(tx: Transaction) -> Self {
+        TransactionEnvelope::Tx(TransactionV1Envelope {
+            tx,
+            signatures: VecM::default(),
+        })
+    }
+}
+
+impl From<FeeBumpTransaction> for TransactionEnvelope {
+    fn from(tx: FeeBumpTransaction) -> Self {
+        TransactionEnvelope::TxFeeBump(FeeBumpTransactionEnvelope {
+            tx,
+            signatures: VecM::default(),
+        })
+    }
+}
+
+impl From<&FeeBumpTransaction> for TransactionEnvelope {
+    fn from(tx: &FeeBumpTransaction) -> Self {
+        tx.clone().into()
+    }
+}
+
+impl From<&Transaction> for TransactionEnvelope {
+    fn from(tx: &Transaction) -> Self {
+        tx.clone().into()
+    }
+}

tests/tx_small.rs

@@ -79,6 +79,22 @@ fn test_build_small_tx_with_alloc() -> Result<(), Error> {
     Ok(())
 }
 
+#[cfg(feature = "alloc")]
+#[test]
+fn convert_reference_of_tx_to_unsigned_transaction_envelope() -> Result<(), Error> {
+    let tx = &Transaction {
+        source_account: MuxedAccount::Ed25519(Uint256([0; 32])),
+        fee: 0,
+        seq_num: SequenceNumber(1),
+        cond: Preconditions::None,
+        memo: Memo::Text("Stellar".as_bytes().try_into()?),
+        operations: [].to_vec().try_into()?,
+        ext: TransactionExt::V0,
+    };
+    let _: TransactionEnvelope = tx.into();
+    Ok(())
+}
+
 #[cfg(not(feature = "alloc"))]
 #[test]
 fn test_build_small_tx_with_alloc() -> Result<(), Error> {