some fixes from review

cmd/tendermint/commands/run_node.go

@@ -6,7 +6,7 @@ import (
 	"github.com/spf13/cobra"
 
 	cfg "github.com/tendermint/tendermint/config"
-	"github.com/tendermint/tendermint/node"
+	nm "github.com/tendermint/tendermint/node"
 	"github.com/tendermint/tendermint/proxy"
 	"github.com/tendermint/tendermint/types"
 )
@@ -53,26 +53,13 @@ func DefaultSignerAndApp(config *cfg.Config) (types.PrivValidator, proxy.ClientC
 
 // NewRunNodeCmd returns the command that allows the CLI to start a
 // node. It can be used with a custom PrivValidator and in-process ABCI application.
-func NewRunNodeCmd(signerAndApp FuncSignerAndApp) *cobra.Command {
+func NewRunNodeCmd(nodeFunc nm.NodeProvider) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "node",
 		Short: "Run the tendermint node",
 		RunE: func(cmd *cobra.Command, args []string) error {
-			genDocFile := config.GenesisFile()
-			genDoc, err := types.GenesisDocFromFile(genDocFile)
-			if err != nil {
-				return err
-			}
-			config.ChainID = genDoc.ChainID
-
 			// Create & start node
-			privVal, clientCreator := signerAndApp(config)
-			n, err := node.NewNode(config,
-				privVal,
-				clientCreator,
-				node.DefaultGenesisDocProviderFunc(config),
-				node.DefaultDBProvider,
-				logger.With("module", "node"))
+			n, err := nodeFunc(config, logger)
 			if err != nil {
 				return fmt.Errorf("Failed to create node: %v", err)
 			}

cmd/tendermint/main.go

@@ -6,6 +6,7 @@ import (
 	"github.com/tendermint/tmlibs/cli"
 
 	cmd "github.com/tendermint/tendermint/cmd/tendermint/commands"
+	nm "github.com/tendermint/tendermint/node"
 )
 
 func main() {
@@ -26,12 +27,14 @@ func main() {
 	// Users wishing to:
 	//	* Use an external signer for their validators
 	//	* Supply an in-proc abci app
+	//	* Supply a genesis doc file from another source
+	//  * Provide their own DB implementation
 	// can copy this file and use something other than the
-	// DefaultSignerAndApp function
-	signerAndApp := cmd.DefaultSignerAndApp
+	// DefaultNewNode function
+	nodeFunc := nm.DefaultNewNode
 
 	// Create & start node
-	rootCmd.AddCommand(cmd.NewRunNodeCmd(signerAndApp))
+	rootCmd.AddCommand(cmd.NewRunNodeCmd(nodeFunc))
 
 	cmd := cli.PrepareBaseCmd(rootCmd, "TM", os.ExpandEnv("$HOME/.tendermint"))
 	cmd.Execute()

node/node.go

@@ -65,6 +65,21 @@ func DefaultGenesisDocProviderFunc(config *cfg.Config) GenesisDocProvider {
 	}
 }
 
+// NodeProvider takes a config and a logger and returns a ready to go Node.
+type NodeProvider func(*cfg.Config, log.Logger) (*Node, error)
+
+// DefaultNewNode returns a Tendermint node with default settings for the
+// PrivValidator, ClientCreator, GenesisDoc, and DBProvider.
+// It implements NodeProvider.
+func DefaultNewNode(config *cfg.Config, logger log.Logger) (*Node, error) {
+	return NewNode(config,
+		types.LoadOrGenPrivValidatorFS(config.PrivValidatorFile()),
+		proxy.DefaultClientCreator(config.ProxyApp, config.ABCI, config.DBDir()),
+		DefaultGenesisDocProviderFunc(config),
+		DefaultDBProvider,
+		logger)
+}
+
 //------------------------------------------------------------------------------
 
 // Node is the highest level interface to a full Tendermint node.
@@ -94,19 +109,6 @@ type Node struct {
 	txIndexer        txindex.TxIndexer
 }
 
-// NewNodeDefault returns a Tendermint node with default settings for the
-// PrivValidator, ClientCreator, GenesisDoc, and DBProvider,
-func NewNodeDefault(config *cfg.Config, logger log.Logger) (*Node, error) {
-	// Get PrivValidator
-	privValidator := types.LoadOrGenPrivValidatorFS(config.PrivValidatorFile())
-	return NewNode(config,
-		privValidator,
-		proxy.DefaultClientCreator(config.ProxyApp, config.ABCI, config.DBDir()),
-		DefaultGenesisDocProviderFunc(config),
-		DefaultDBProvider,
-		logger)
-}
-
 // NewNode returns a new, ready to go, Tendermint Node.
 func NewNode(config *cfg.Config,
 	privValidator types.PrivValidator,

node/node_test.go

@@ -15,8 +15,8 @@ func TestNodeStartStop(t *testing.T) {
 	config := cfg.ResetTestRoot("node_node_test")
 
 	// Create & start node
-	n, err := NewNodeDefault(config, log.TestingLogger())
-	assert.NoError(t, err, "expected no err on NewNodeDefault")
+	n, err := DefaultNewNode(config, log.TestingLogger())
+	assert.NoError(t, err, "expected no err on DefaultNewNode")
 	n.Start()
 	t.Logf("Started node %v", n.sw.NodeInfo())
 

types/priv_validator.go

@@ -121,19 +121,9 @@ func GenPrivValidatorFS(filePath string) *PrivValidatorFS {
 
 // LoadPrivValidatorFS loads a PrivValidatorFS from the filePath.
 func LoadPrivValidatorFS(filePath string) *PrivValidatorFS {
-	privValJSONBytes, err := ioutil.ReadFile(filePath)
-	if err != nil {
-		cmn.Exit(err.Error())
-	}
-	privVal := PrivValidatorFS{}
-	err = json.Unmarshal(privValJSONBytes, &privVal)
-	if err != nil {
-		cmn.Exit(cmn.Fmt("Error reading PrivValidator from %v: %v\n", filePath, err))
-	}
-
-	privVal.filePath = filePath
-	privVal.Signer = NewDefaultSigner(privVal.PrivKey)
-	return &privVal
+	return LoadPrivValidatorFSWithSigner(filePath, func(privVal PrivValidator) Signer {
+		return NewDefaultSigner(privVal.(*PrivValidatorFS).PrivKey)
+	})
 }
 
 // LoadOrGenPrivValidatorFS loads a PrivValidatorFS from the given filePath
@@ -153,20 +143,20 @@ func LoadOrGenPrivValidatorFS(filePath string) *PrivValidatorFS {
 // signer object. The PrivValidatorFS handles double signing prevention by persisting
 // data to the filePath, while the Signer handles the signing.
 // If the filePath does not exist, the PrivValidatorFS must be created manually and saved.
-func LoadPrivValidatorFSWithSigner(filePath string, signerFunc func(crypto.PubKey) Signer) *PrivValidatorFS {
+func LoadPrivValidatorFSWithSigner(filePath string, signerFunc func(PrivValidator) Signer) *PrivValidatorFS {
 	privValJSONBytes, err := ioutil.ReadFile(filePath)
 	if err != nil {
 		cmn.Exit(err.Error())
 	}
-	privVal := PrivValidatorFS{}
+	privVal := &PrivValidatorFS{}
 	err = json.Unmarshal(privValJSONBytes, &privVal)
 	if err != nil {
 		cmn.Exit(cmn.Fmt("Error reading PrivValidator from %v: %v\n", filePath, err))
 	}
 
 	privVal.filePath = filePath
-	privVal.Signer = signerFunc(privVal.PubKey)
-	return &privVal
+	privVal.Signer = signerFunc(privVal)
+	return privVal
 }
 
 // Save persists the PrivValidatorFS to disk.

types/priv_validator_test.go

@@ -29,19 +29,19 @@ func TestLoadValidator(t *testing.T) {
 	require.Nil(err, "%+v", err)
 
 	serialized := fmt.Sprintf(`{
-    "address": "%s",
-    "pub_key": {
-      "type": "ed25519",
-      "data": "%s"
-    },
-    "last_height": 0,
-    "last_round": 0,
-    "last_step": 0,
-    "last_signature": null,
-    "priv_key": {
-      "type": "ed25519",
-      "data": "%s"
-    }
+  "address": "%s",
+  "pub_key": {
+    "type": "ed25519",
+    "data": "%s"
+  },
+  "last_height": 0,
+  "last_round": 0,
+  "last_step": 0,
+  "last_signature": null,
+  "priv_key": {
+    "type": "ed25519",
+    "data": "%s"
+  }
 }`, addrStr, pubStr, privStr)
 
 	val := PrivValidatorFS{}