feat: add Transaction setters and separate random tx signing (#2951)

crates/interfaces/src/test_utils/generators.rs

@@ -72,6 +72,11 @@ pub fn random_signed_tx() -> TransactionSigned {
     let secp = Secp256k1::new();
     let key_pair = KeyPair::new(&secp, &mut rand::thread_rng());
     let tx = random_tx();
+    sign_tx_with_key_pair(key_pair, tx)
+}
+
+/// Signs the [Transaction] with the given key pair.
+pub fn sign_tx_with_key_pair(key_pair: KeyPair, tx: Transaction) -> TransactionSigned {
     let signature =
         sign_message(H256::from_slice(&key_pair.secret_bytes()[..]), tx.signature_hash()).unwrap();
     TransactionSigned::from_transaction_and_signature(tx, signature)

crates/primitives/src/transaction/mod.rs

@@ -224,6 +224,33 @@ impl Transaction {
             }
         }
     }
+
+    /// This sets the transaction's nonce.
+    pub fn set_nonce(&mut self, nonce: u64) {
+        match self {
+            Transaction::Legacy(tx) => tx.nonce = nonce,
+            Transaction::Eip2930(tx) => tx.nonce = nonce,
+            Transaction::Eip1559(tx) => tx.nonce = nonce,
+        }
+    }
+
+    /// This sets the transaction's value.
+    pub fn set_value(&mut self, value: u128) {
+        match self {
+            Transaction::Legacy(tx) => tx.value = value,
+            Transaction::Eip2930(tx) => tx.value = value,
+            Transaction::Eip1559(tx) => tx.value = value,
+        }
+    }
+
+    /// This sets the transaction's input field.
+    pub fn set_input(&mut self, input: Bytes) {
+        match self {
+            Transaction::Legacy(tx) => tx.input = input,
+            Transaction::Eip2930(tx) => tx.input = input,
+            Transaction::Eip1559(tx) => tx.input = input,
+        }
+    }
 }
 
 impl Compact for Transaction {