Reuse Tendermint client instance (closes #671)

client/context/viper.go

@@ -3,17 +3,25 @@ package context
 import (
 	"github.com/spf13/viper"
 
+	rpcclient "github.com/tendermint/tendermint/rpc/client"
+
 	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/core"
 )
 
 func NewCoreContextFromViper() core.CoreContext {
+	nodeURI := viper.GetString(client.FlagNode)
+	var rpc rpcclient.Client
+	if nodeURI != "" {
+		rpc = rpcclient.NewHTTP(nodeURI, "/websocket")
+	}
 	return core.CoreContext{
 		ChainID:         viper.GetString(client.FlagChainID),
 		Height:          viper.GetInt64(client.FlagHeight),
 		TrustNode:       viper.GetBool(client.FlagTrustNode),
-		NodeURI:         viper.GetString(client.FlagNode),
 		FromAddressName: viper.GetString(client.FlagName),
+		NodeURI:         nodeURI,
 		Sequence:        viper.GetInt64(client.FlagSequence),
+		Client:          rpc,
 	}
 }

client/core/context.go

@@ -1,5 +1,9 @@
 package core
 
+import (
+	rpcclient "github.com/tendermint/tendermint/rpc/client"
+)
+
 type CoreContext struct {
 	ChainID         string
 	Height          int64
@@ -7,6 +11,7 @@ type CoreContext struct {
 	NodeURI         string
 	FromAddressName string
 	Sequence        int64
+	Client          rpcclient.Client
 }
 
 func (c CoreContext) WithChainID(chainID string) CoreContext {
@@ -38,3 +43,8 @@ func (c CoreContext) WithSequence(sequence int64) CoreContext {
 	c.Sequence = sequence
 	return c
 }
+
+func (c CoreContext) WithClient(client rpcclient.Client) CoreContext {
+	c.Client = client
+	return c
+}

client/core/core.go

@@ -146,8 +146,8 @@ func (ctx CoreContext) GetPassphraseFromStdin(name string) (pass string, err err
 
 // GetNode prepares a simple rpc.Client
 func (ctx CoreContext) GetNode() (rpcclient.Client, error) {
-	if ctx.NodeURI == "" {
+	if ctx.Client == nil {
 		return nil, errors.New("Must define node URI")
 	}
-	return rpcclient.NewHTTP(ctx.NodeURI, "/websocket"), nil
+	return ctx.Client, nil
 }