diff --git a/util/elementsd_connector.go b/util/elementsd_connector.go
index e6021b4..c10931f 100644
--- a/util/elementsd_connector.go
+++ b/util/elementsd_connector.go
@@ -24,7 +24,7 @@ func ReissueAsset(reissueTx string) (txID string, err error) {
 	cmdArgs := strings.Split(reissueTx, " ")
 	elementsSyncAccess.Lock()
 	defer elementsSyncAccess.Unlock()
-	result, err := elements.ReissueAsset(url, []string{cmdArgs[1], cmdArgs[2]})
+	result, err := elements.ReissueAsset(url, []string{`"` + cmdArgs[1] + `"`, cmdArgs[2]})
 	if err != nil {
 		return
 	}
@@ -39,7 +39,7 @@ func DistributeAsset(address string, amount string, reissuanceAsset string) (txI
 	elementsSyncAccess.Lock()
 	defer elementsSyncAccess.Unlock()
 	txID, err = elements.SendToAddress(url, []string{
-		address,
+		`"` + address + `"`,
 		`"` + amount + `"`,
 		`""`,
 		`""`,
@@ -62,7 +62,7 @@ func IssueNFTAsset(name string, machineAddress string, domain string) (assetID s
 		return
 	}
 
-	addressInfo, err := elements.GetAddressInfo(url, []string{address})
+	addressInfo, err := elements.GetAddressInfo(url, []string{`"` + address + `"`})
 	if err != nil {
 		return
 	}
@@ -74,7 +74,7 @@ func IssueNFTAsset(name string, machineAddress string, domain string) (assetID s
 		return
 	}
 
-	fundRawTransactionResult, err := elements.FundRawTransaction(url, []string{hex, `{"feeRate":0.00001000}`})
+	fundRawTransactionResult, err := elements.FundRawTransaction(url, []string{`"` + hex + `"`, `{"feeRate":0.00001000}`})
 	if err != nil {
 		return
 	}
@@ -109,7 +109,7 @@ func IssueNFTAsset(name string, machineAddress string, domain string) (assetID s
 		hash[i], hash[j] = hash[j], hash[i]
 	}
 
-	rawIssueAssetResults, err := elements.RawIssueAsset(url, []string{fundRawTransactionResult.Hex,
+	rawIssueAssetResults, err := elements.RawIssueAsset(url, []string{`"` + fundRawTransactionResult.Hex + `"`,
 		`[{"asset_amount":0.00000001, "asset_address":"` + address + `", "blind":false, "contract_hash":"` + fmt.Sprintf("%+x", hash) + `"}]`,
 	})
 	if err != nil {
@@ -117,13 +117,13 @@ func IssueNFTAsset(name string, machineAddress string, domain string) (assetID s
 	}
 
 	rawIssueAssetResult := rawIssueAssetResults[len(rawIssueAssetResults)-1]
-	hex, err = elements.BlindRawTransaction(url, []string{rawIssueAssetResult.Hex, `true`, `[]`, `false`})
+	hex, err = elements.BlindRawTransaction(url, []string{`"` + rawIssueAssetResult.Hex + `"`, `true`, `[]`, `false`})
 	if err != nil {
 		return
 	}
 	assetID = rawIssueAssetResult.Asset
 
-	signRawTransactionWithWalletResult, err := elements.SignRawTransactionWithWallet(url, []string{hex})
+	signRawTransactionWithWalletResult, err := elements.SignRawTransactionWithWallet(url, []string{`"` + hex + `"`})
 	if err != nil {
 		return
 	}
@@ -139,7 +139,7 @@ func IssueNFTAsset(name string, machineAddress string, domain string) (assetID s
 		return
 	}
 
-	hex, err = elements.SendRawTransaction(url, []string{signRawTransactionWithWalletResult.Hex})
+	hex, err = elements.SendRawTransaction(url, []string{`"` + signRawTransactionWithWalletResult.Hex + `"`})
 	if err != nil {
 		return
 	}
diff --git a/util/elementsd_connector_test.go b/util/elementsd_connector_test.go
new file mode 100644
index 0000000..8701c77
--- /dev/null
+++ b/util/elementsd_connector_test.go
@@ -0,0 +1,60 @@
+package util_test
+
+import (
+	"fmt"
+	"math/rand"
+	"strconv"
+	"sync"
+	"testing"
+
+	"github.com/planetmint/planetmint-go/testutil/moduleobject"
+	"github.com/planetmint/planetmint-go/testutil/sample"
+	"github.com/planetmint/planetmint-go/util"
+	"github.com/planetmint/planetmint-go/x/machine/types"
+	elements "github.com/rddl-network/elements-rpc"
+	elementsmocks "github.com/rddl-network/elements-rpc/utils/mocks"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestReissueAsset(t *testing.T) {
+	elements.Client = &elementsmocks.MockClient{}
+	txid, err := util.ReissueAsset("reissueasset 06c20c8de513527f1ae6c901f74a05126525ac2d7e89306f4a7fd5ec4e674403 900.000")
+	fmt.Println("txid :" + txid)
+	assert.NoError(t, err)
+}
+
+func TestDistributeAsset(t *testing.T) {
+	elements.Client = &elementsmocks.MockClient{}
+
+	txid, err := util.DistributeAsset(
+		"tlq1qqt5078sef4aqls29c3j3pwfmukgjug70t37x26gwyhzpdxmtmjmphar88fwsl9qcm559jevve772prhtuyf9xkxdtrhvuce6a",
+		"20",
+		"06c20c8de513527f1ae6c901f74a05126525ac2d7e89306f4a7fd5ec4e674403")
+	fmt.Println("txid :" + txid)
+	assert.NoError(t, err)
+}
+
+func TestIssueNFTAsset(t *testing.T) {
+	elements.Client = &elementsmocks.MockClient{}
+
+	params := types.DefaultParams()
+	var wg sync.WaitGroup
+
+	for i := 0; i < 1; i++ {
+		wg.Add(1)
+		go func() {
+			randomInt := rand.Int()
+			sk, pk := sample.KeyPair(randomInt)
+			machine := moduleobject.MachineRandom(pk, pk, sk, "address "+strconv.Itoa(randomInt), randomInt)
+
+			assetID, contract, hex, err := util.IssueNFTAsset(machine.Name, machine.Address, params.AssetRegistryDomain)
+			fmt.Println("asset id :" + assetID)
+			fmt.Println("contract :" + contract)
+			fmt.Println("hex :" + hex)
+			assert.NoError(t, err)
+
+			wg.Done()
+		}()
+	}
+	wg.Wait()
+}