diff --git a/go.mod b/go.mod
index 48ee1f4..b1c7920 100644
--- a/go.mod
+++ b/go.mod
@@ -1,20 +1,32 @@
 module github.com/changtong1996/djzh
-go 1.13
+
+go 1.14
 
 require (
+	github.com/99designs/keyring v1.1.4 // indirect
 	github.com/btcsuite/btcd v0.0.0-20190807005414-4063feeff79a // indirect
-	github.com/cosmos/cosmos-sdk v0.38.0
-	github.com/golang/mock v1.3.1 // indirect
+	github.com/cosmos/cosmos-sdk v0.38.3
+	github.com/gibson042/canonicaljson-go v1.0.3 // indirect
+	github.com/golang/mock v1.4.3 // indirect
+	github.com/gorilla/handlers v1.4.2 // indirect
+	github.com/gorilla/mux v1.7.4
 	github.com/onsi/ginkgo v1.8.0 // indirect
 	github.com/onsi/gomega v1.5.0 // indirect
-	github.com/prometheus/client_golang v1.1.0 // indirect
+	github.com/otiai10/copy v1.1.1
+	github.com/pelletier/go-toml v1.7.0 // indirect
+	github.com/pkg/errors v0.9.1
+	github.com/rakyll/statik v0.1.7 // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20190706150252-9beb055b7962 // indirect
+	github.com/regen-network/cosmos-proto v0.1.1-0.20200213154359-02baa11ea7c2 // indirect
+	github.com/snikch/goodman v0.0.0-20171125024755-10e37e294daa
 	github.com/spf13/afero v1.2.2 // indirect
-	github.com/spf13/cobra v0.0.5
-	github.com/spf13/viper v1.6.2
+	github.com/spf13/cobra v0.0.7
+	github.com/spf13/viper v1.6.3
+	github.com/stretchr/testify v1.5.1
 	github.com/tendermint/go-amino v0.15.1
-	github.com/tendermint/tendermint v0.33.0
-	github.com/tendermint/tm-db v0.4.0
+	github.com/tendermint/iavl v0.13.3 // indirect
+	github.com/tendermint/tendermint v0.33.3
+	github.com/tendermint/tm-db v0.5.1
 	golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 // indirect
-	golang.org/x/text v0.3.2 // indirect
+	google.golang.org/protobuf v1.20.1 // indirect
 )
\ No newline at end of file
diff --git a/x/djzh/client/rest/tx.go b/x/djzh/client/rest/tx.go
index c187745..9ac5cd8 100644
--- a/x/djzh/client/rest/tx.go
+++ b/x/djzh/client/rest/tx.go
@@ -26,7 +26,7 @@ type CreateArticleReq struct {
 	Tid			 string         `json:"tid"`
 	Uid          string         `json:"uid"`
 	A_timestamp  string         `json:"a_timestamp"`
-	Reward       sdk.Coins      `json:"reward"`            // reward of the article
+	Reward       string         `json:"reward"`            // reward of the article
 }
 
 func CreateArticleHandler(cliCtx context.CLIContext) http.HandlerFunc{
@@ -49,8 +49,13 @@ func CreateArticleHandler(cliCtx context.CLIContext) http.HandlerFunc{
 			return
 		}
 
+		coins, err := sdk.ParseCoins(req.Reward)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
 		// create the message
-		msg := types.NewMsgCreateArticle(addr, req.A_text, req.A_title, req.Tag, req.Article_id, req.Tid, req.Uid, req.A_timestamp, req.Reward)
+		msg := types.NewMsgCreateArticle(addr, req.A_text, req.A_title, req.Tag, req.Article_id, req.Tid, req.Uid, req.A_timestamp, coins)
 		err = msg.ValidateBasic()
 		if err != nil {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
@@ -72,7 +77,7 @@ type CreateCommentReq struct {
 	Uid          string          `json:"uid"`							 // id of the user
 	C_timestamp  string          `json:"c_timestamp"`                    // timestamp of the comment 
 	C_text       string          `json:"c_text"`                         // context of the comment
-	Reward       sdk.Coins       `json:"reward"`
+	Reward       string          `json:"reward"`
 }
 
 func CreateCommentHandler(cliCtx context.CLIContext) http.HandlerFunc {
@@ -95,8 +100,14 @@ func CreateCommentHandler(cliCtx context.CLIContext) http.HandlerFunc {
 			return
 		}
 
+		coins, err := sdk.ParseCoins(req.Reward)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
+
 		// create the message
-		msg := types.NewMsgCreateComment(addr, req.Comment_id, req.Article_id, req.Tid, req.Uid, req.C_timestamp, req.C_text, req.Reward)
+		msg := types.NewMsgCreateComment(addr, req.Comment_id, req.Article_id, req.Tid, req.Uid, req.C_timestamp, req.C_text, coins)
 		err = msg.ValidateBasic()
 		if err != nil {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
@@ -119,8 +130,7 @@ type CreateReturnVisitReq struct {
 	Rv_timestamp     string           `json:"rv_timestamp"`
 	Rv_text			 string           `json:"rv_text"`
 	Flag             string           `json:"flag"` 
-	Reward           sdk.Coins        `json:"reward"`            // reward of the article
-
+	Reward           string           `json:"reward"`            // reward of the article
 }
 
 
@@ -144,8 +154,14 @@ func CreateReturnVisitHandler(cliCtx context.CLIContext) http.HandlerFunc {
 			return
 		}
 
+		coins, err := sdk.ParseCoins(req.Reward)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
+
 		// create the message
-		msg := types.NewMsgCreateReturnVisit(addr, req.Return_visit_id, req.Article_id, req.Tid, req.Uid, req.Rv_timestamp, req.Rv_text, req.Flag, req.Reward)
+		msg := types.NewMsgCreateReturnVisit(addr, req.Return_visit_id, req.Article_id, req.Tid, req.Uid, req.Rv_timestamp, req.Rv_text, req.Flag, coins)
 		err = msg.ValidateBasic()
 		if err != nil {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
diff --git a/x/djzh/handler.go b/x/djzh/handler.go
index d1c2113..2a805a0 100644
--- a/x/djzh/handler.go
+++ b/x/djzh/handler.go
@@ -100,6 +100,7 @@ func handleMsgCreateComment(ctx sdk.Context, k Keeper, msg MsgCreateComment) (*s
 	if err == nil {
 		return nil, sdkerrors.Wrap(err, "Comment with that id already exists")
 	}
+	//need to modify
 	moduleAcct := sdk.AccAddress(crypto.AddressHash([]byte(types.ModuleName)))
 	sdkError := k.CoinKeeper.SendCoins(ctx, comment.Creator, moduleAcct, comment.Reward)
 	if sdkError != nil {