feat(cmd): Add support for outputting unsigned transactions

cmd/common/transaction.go

@@ -30,17 +30,23 @@ import (
 )
 
 var (
-	txOffline   bool
-	txNonce     uint64
-	txGasLimit  uint64
-	txGasPrice  string
-	txEncrypted bool
-	txYes       bool
+	txOffline    bool
+	txNonce      uint64
+	txGasLimit   uint64
+	txGasPrice   string
+	txEncrypted  bool
+	txYes        bool
+	txUnsigned   bool
+	txFormat     string
+	txOutputFile string
 )
 
 const (
 	invalidNonce    = math.MaxUint64
 	invalidGasLimit = math.MaxUint64
+
+	formatJSON = "json"
+	formatCBOR = "cbor"
 )
 
 // TransactionFlags contains the common transaction flags.
@@ -75,7 +81,7 @@ func SignConsensusTransaction(
 	wallet wallet.Account,
 	conn connection.Connection,
 	tx *consensusTx.Transaction,
-) (*consensusTx.SignedTransaction, error) {
+) (interface{}, error) {
 	// Require consensus signer.
 	signer := wallet.ConsensusSigner()
 	if signer == nil {
@@ -135,6 +141,11 @@ func SignConsensusTransaction(
 	}
 	tx.Fee.Amount = *gasPrice
 
+	if txUnsigned {
+		// Return an unsigned transaction.
+		return tx, nil
+	}
+
 	PrintTransactionBeforeSigning(npa, tx)
 
 	// Sign the transaction.
@@ -159,7 +170,7 @@ func SignParaTimeTransaction(
 	conn connection.Connection,
 	tx *types.Transaction,
 	txDetails *signature.TxDetails,
-) (*types.UnverifiedTransaction, interface{}, error) {
+) (interface{}, interface{}, error) {
 	if npa.ParaTime == nil {
 		return nil, nil, fmt.Errorf("no paratime configured for paratime transaction signing")
 	}
@@ -253,6 +264,11 @@ func SignParaTimeTransaction(
 		tx.Call = *encCall
 	}
 
+	if txUnsigned {
+		// Return an unsigned transaction.
+		return tx, meta, nil
+	}
+
 	PrintTransactionBeforeSigning(npa, tx)
 
 	// Sign the transaction.
@@ -338,10 +354,33 @@ func PrintTransactionBeforeSigning(npa *NPASelection, tx interface{}) {
 
 // PrintSignedTransaction prints a signed transaction.
 func PrintSignedTransaction(sigTx interface{}) {
-	// TODO: Add some options for controlling output.
-	formatted, err := json.MarshalIndent(sigTx, "", "  ")
-	cobra.CheckErr(err)
-	fmt.Println(string(formatted))
+	// Determine output destination.
+	var err error
+	outputFile := os.Stdout
+	if txOutputFile != "" {
+		outputFile, err = os.Create(txOutputFile)
+		if err != nil {
+			cobra.CheckErr(fmt.Errorf("failed to open output file: %w", err))
+		}
+		defer outputFile.Close()
+	}
+
+	// Determine output format.
+	var data []byte
+	switch txFormat {
+	case formatJSON:
+		data, err = json.MarshalIndent(sigTx, "", "  ")
+		cobra.CheckErr(err)
+	case formatCBOR:
+		data = cbor.Marshal(sigTx)
+	default:
+		cobra.CheckErr(fmt.Errorf("unknown transaction format: %s", txFormat))
+	}
+
+	_, err = outputFile.Write(data)
+	if err != nil {
+		cobra.CheckErr(fmt.Errorf("failed to write output: %w", err))
+	}
 }
 
 // BroadcastTransaction broadcasts a transaction.
@@ -355,7 +394,7 @@ func BroadcastTransaction(
 	meta interface{},
 	result interface{},
 ) {
-	if txOffline {
+	if txOffline || txUnsigned {
 		PrintSignedTransaction(tx)
 		return
 	}
@@ -474,4 +513,7 @@ func init() {
 	TransactionFlags.StringVar(&txGasPrice, "gas-price", "", "override gas price to use")
 	TransactionFlags.BoolVar(&txEncrypted, "encrypted", false, "encrypt transaction call data (requires online mode)")
 	TransactionFlags.BoolVarP(&txYes, "yes", "y", false, "answer yes to all questions")
+	TransactionFlags.BoolVar(&txUnsigned, "unsigned", false, "do not sign transaction")
+	TransactionFlags.StringVar(&txFormat, "format", "json", "transaction output format (for offline/unsigned modes) [json, cbor]")
+	TransactionFlags.StringVar(&txOutputFile, "output-file", "", "output transaction into specified file (for offline/unsigned modes)")
 }