R4R: hide dbKeybase's constructor

PENDING.md

@@ -9,6 +9,11 @@ BREAKING CHANGES
 * Gaia
 
 * SDK
+ * \#3592 Drop deprecated keybase implementation's
+   New constructor in favor of a new
+   crypto/keys.New(string, string) implementation that
+   returns a lazy keybase instance. Remove client.MockKeyBase,
+   superseded by crypto/keys.NewInMemory()
 
 * Tendermint
 
@@ -48,4 +53,4 @@ BUG FIXES
 
 * SDK
 
-* Tendermint
+* Tendermint

client/keys/add.go

@@ -104,7 +104,7 @@ func runAddCmd(_ *cobra.Command, args []string) error {
 	if viper.GetBool(flagDryRun) {
 		// we throw this away, so don't enforce args,
 		// we want to get a new random seed phrase quickly
-		kb = client.MockKeyBase()
+		kb = keys.NewInMemory()
 		encryptPassword = app.DefaultKeyPass
 	} else {
 		kb, err = NewKeyBaseFromHomeFlag()
@@ -309,7 +309,7 @@ func printCreate(info keys.Info, showMnemonic bool, mnemonic string) error {
 
 // function to just create a new seed to display in the UI before actually persisting it in the keybase
 func generateMnemonic(algo keys.SigningAlgo) string {
-	kb := client.MockKeyBase()
+	kb := keys.NewInMemory()
 	pass := app.DefaultKeyPass
 	name := "inmemorykey"
 	_, seed, _ := kb.CreateMnemonic(name, keys.English, pass, algo)

client/keys/utils.go

@@ -14,11 +14,13 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
-// KeyDBName is the directory under root where we store the keys
+// available output formats.
 const (
-	KeyDBName        = "keys"
 	OutputFormatText = "text"
 	OutputFormatJSON = "json"
+
+	// defaultKeyDBName is the client's subdirectory where keys are stored.
+	defaultKeyDBName = "keys"
 )
 
 type bechKeyOutFn func(keyInfo keys.Info) (KeyOutput, error)
@@ -87,7 +89,7 @@ func NewKeyBaseFromDir(rootDir string) (keys.Keybase, error) {
 func NewInMemoryKeyBase() keys.Keybase { return keys.NewInMemory() }
 
 func getLazyKeyBaseFromDir(rootDir string) (keys.Keybase, error) {
-	return keys.NewLazyKeybase(KeyDBName, filepath.Join(rootDir, "keys")), nil
+	return keys.New(defaultKeyDBName, filepath.Join(rootDir, "keys")), nil
 }
 
 // create a list of KeyOutput in bech32 format

client/lcd/test_helpers.go

@@ -682,7 +682,7 @@ func doTransferWithGas(
 ) (res *http.Response, body string, receiveAddr sdk.AccAddress) {
 
 	// create receive address
-	kb := client.MockKeyBase()
+	kb := crkeys.NewInMemory()
 
 	receiveInfo, _, err := kb.CreateMnemonic(
 		"receive_address", crkeys.English, gapp.DefaultKeyPass, crkeys.SigningAlgo("secp256k1"),
@@ -724,7 +724,7 @@ func doTransferWithGasAccAuto(
 ) (res *http.Response, body string, receiveAddr sdk.AccAddress) {
 
 	// create receive address
-	kb := client.MockKeyBase()
+	kb := crkeys.NewInMemory()
 
 	receiveInfo, _, err := kb.CreateMnemonic(
 		"receive_address", crkeys.English, gapp.DefaultKeyPass, crkeys.SigningAlgo("secp256k1"),

crypto/keys/keybase.go

@@ -77,14 +77,15 @@ type dbKeybase struct {
 	db dbm.DB
 }
 
-// New creates a new keybase instance using the passed DB for reading and writing keys.
-func New(db dbm.DB) Keybase {
+// newDbKeybase creates a new keybase instance using the passed DB for reading and writing keys.
+func newDbKeybase(db dbm.DB) Keybase {
 	return dbKeybase{
 		db: db,
 	}
 }
 
-// NewInMemory creates a new keybase on top of in-memory storage instance.
+// NewInMemory creates a transient keybase on top of in-memory storage
+// instance useful for testing purposes and on-the-fly key generation.
 func NewInMemory() Keybase { return dbKeybase{dbm.NewMemDB()} }
 
 // CreateMnemonic generates a new key and persists it to storage, encrypted

crypto/keys/keybase_test.go

@@ -1,51 +1,34 @@
-package keys
+package keys_test
 
 import (
 	"fmt"
-	"io/ioutil"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 
+	. "github.com/cosmos/cosmos-sdk/crypto/keys"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/hd"
 	"github.com/cosmos/cosmos-sdk/crypto/keys/mintkey"
 	"github.com/cosmos/cosmos-sdk/types"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/tendermint/tendermint/crypto"
 	"github.com/tendermint/tendermint/crypto/ed25519"
-	dbm "github.com/tendermint/tendermint/libs/db"
 )
 
 func init() {
 	mintkey.BcryptSecurityParameter = 1
 }
 
-func TestKeybaseOpenClose(t *testing.T) {
-	dir, err := ioutil.TempDir("", "TestKeybaseOpenClose")
-	assert.Nil(t, err)
-
-	kb := New(dbm.NewDB("TestKeybaseOpenClose", dbm.LevelDBBackend, dir))
-	kb.CloseDB()
-
-	// The DB has been closed. At the moment, the expected behaviour is to panic
-	assert.Panics(t, func() {
-		_, _ = kb.CreateAccount(
-			"some_account",
-			"key pair crucial catch public canyon evil outer stage ten gym tornado",
-			"", "", 0, 1)
-	})
-}
-
 func TestLanguage(t *testing.T) {
-	kb := New(dbm.NewMemDB())
+	kb := NewInMemory()
 	_, _, err := kb.CreateMnemonic("something", Japanese, "no_pass", Secp256k1)
 	assert.Error(t, err)
 	assert.Equal(t, "unsupported language: only english is supported", err.Error())
 }
 
 func TestCreateAccountInvalidMnemonic(t *testing.T) {
-	kb := New(dbm.NewMemDB())
+	kb := NewInMemory()
 	_, err := kb.CreateAccount(
 		"some_account",
 		"malarkey pair crucial catch public canyon evil outer stage ten gym tornado",
@@ -55,14 +38,14 @@ func TestCreateAccountInvalidMnemonic(t *testing.T) {
 }
 
 func TestCreateLedgerUnsupportedAlgo(t *testing.T) {
-	kb := New(dbm.NewMemDB())
+	kb := NewInMemory()
 	_, err := kb.CreateLedger("some_account", Ed25519, 0, 1)
 	assert.Error(t, err)
 	assert.Equal(t, "unsupported signing algo: only secp256k1 is supported", err.Error())
 }
 
 func TestCreateLedger(t *testing.T) {
-	kb := New(dbm.NewMemDB())
+	kb := NewInMemory()
 
 	// test_cover and test_unit will result in different answers
 	// test_cover does not compile some dependencies so ledger is disabled
@@ -86,8 +69,7 @@ func TestCreateLedger(t *testing.T) {
 // TestKeyManagement makes sure we can manipulate these keys well
 func TestKeyManagement(t *testing.T) {
 	// make the storage with reasonable defaults
-	db := dbm.NewMemDB()
-	cstore := New(db)
+	cstore := NewInMemory()
 
 	algo := Secp256k1
 	n1, n2, n3 := "personal", "business", "other"
@@ -165,13 +147,12 @@ func TestKeyManagement(t *testing.T) {
 	// addr cache gets nuked - and test skip flag
 	err = cstore.Delete(n2, "", true)
 	require.NoError(t, err)
-	require.False(t, db.Has(addrKey(i2.GetAddress())))
 }
 
 // TestSignVerify does some detailed checks on how we sign and validate
 // signatures
 func TestSignVerify(t *testing.T) {
-	cstore := New(dbm.NewMemDB())
+	cstore := NewInMemory()
 	algo := Secp256k1
 
 	n1, n2, n3 := "some dude", "a dudette", "dude-ish"
@@ -253,12 +234,8 @@ func assertPassword(t *testing.T, cstore Keybase, name, pass, badpass string) {
 
 // TestExportImport tests exporting and importing
 func TestExportImport(t *testing.T) {
-
 	// make the storage with reasonable defaults
-	db := dbm.NewMemDB()
-	cstore := New(
-		db,
-	)
+	cstore := NewInMemory()
 
 	info, _, err := cstore.CreateMnemonic("john", English, "secretcpw", Secp256k1)
 	require.NoError(t, err)
@@ -286,10 +263,7 @@ func TestExportImport(t *testing.T) {
 //
 func TestExportImportPubKey(t *testing.T) {
 	// make the storage with reasonable defaults
-	db := dbm.NewMemDB()
-	cstore := New(
-		db,
-	)
+	cstore := NewInMemory()
 
 	// CreateMnemonic a private-public key pair and ensure consistency
 	notPasswd := "n9y25ah7"
@@ -327,11 +301,8 @@ func TestExportImportPubKey(t *testing.T) {
 
 // TestAdvancedKeyManagement verifies update, import, export functionality
 func TestAdvancedKeyManagement(t *testing.T) {
-
 	// make the storage with reasonable defaults
-	cstore := New(
-		dbm.NewMemDB(),
-	)
+	cstore := NewInMemory()
 
 	algo := Secp256k1
 	n1, n2 := "old-name", "new name"
@@ -379,9 +350,7 @@ func TestAdvancedKeyManagement(t *testing.T) {
 func TestSeedPhrase(t *testing.T) {
 
 	// make the storage with reasonable defaults
-	cstore := New(
-		dbm.NewMemDB(),
-	)
+	cstore := NewInMemory()
 
 	algo := Secp256k1
 	n1, n2 := "lost-key", "found-again"
@@ -410,9 +379,7 @@ func TestSeedPhrase(t *testing.T) {
 
 func ExampleNew() {
 	// Select the encryption and storage for your cryptostore
-	cstore := New(
-		dbm.NewMemDB(),
-	)
+	cstore := NewInMemory()
 
 	sec := Secp256k1