signer,accounts,cmd add logic for supporting database backed clef

accounts/keystore/keystore.go

@@ -23,6 +23,8 @@ var (
 // KeyStoreScheme is the protocol scheme prefixing account and wallet URLs.
 const KeyStoreScheme = "keystore"
 
+const keystoreDBTableName = "keystore"
+
 // KeyStore is the interface which abstracts all needed operations required
 type KeyStore interface {
 	// Wallets implements accounts.Backend, returning all single-key wallets from the KeyStore.
@@ -120,8 +122,8 @@ func NewPlaintextKeyStore(keydir string) KeyStore {
 }
 
 // NewKeyStoreDB creates a keystore for the given database
-func NewKeyStoreDB(path, table string, scryptN, scryptP int) (KeyStore, error) {
-	kvstore, err := dbutil.NewKVStore(path, table)
+func NewKeyStoreDB(path string, scryptN, scryptP int) (KeyStore, error) {
+	kvstore, err := dbutil.NewKVStore(path, keystoreDBTableName)
 	if err != nil {
 		return nil, err
 	}

cmd/clef/main.go

@@ -500,9 +500,17 @@ func signer(c *cli.Context) error {
 		nousb    = c.GlobalBool(utils.NoUSBFlag.Name)
 		scpath   = c.GlobalString(utils.SmartCardDaemonPathFlag.Name)
 	)
+	ksDB := c.GlobalString(keystoreDBFlag.Name)
+	if ksDB != "" {
+		// if keystoreDBFlag is set, ignore keystoreFlag
+		ksLoc = ksDB
+	}
 	log.Info("Starting signer", "chainid", chainId, "keystore", ksLoc,
 		"light-kdf", lightKdf, "advanced", advanced)
-	am := core.StartClefAccountManager(ksLoc, nousb, lightKdf, scpath)
+	am, err := core.StartClefAccountManager(ksLoc, nousb, lightKdf, scpath)
+	if err != nil {
+		utils.Fatalf(err.Error())
+	}
 	apiImpl := core.NewSignerAPI(am, chainId, nousb, ui, db, advanced, pwStorage)
 
 	// Establish the bidirectional communication, by creating a new UI backend and registering

signer/core/api.go

@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"math/big"
 	"os"
+	"path/filepath"
 	"reflect"
 
 	"github.com/ethereum/go-ethereum/accounts"
@@ -125,7 +126,8 @@ type Metadata struct {
 	Origin    string `json:"Origin"`
 }
 
-func StartClefAccountManager(ksLocation string, nousb, lightKDF bool, scpath string) *accounts.Manager {
+// StartClefAccountManager initializes and start clef Account Manager
+func StartClefAccountManager(ksLocation string, nousb, lightKDF bool, scpath string) (*accounts.Manager, error) {
 	var (
 		backends []accounts.Backend
 		n, p     = keystore.StandardScryptN, keystore.StandardScryptP
@@ -133,9 +135,28 @@ func StartClefAccountManager(ksLocation string, nousb, lightKDF bool, scpath str
 	if lightKDF {
 		n, p = keystore.LightScryptN, keystore.LightScryptP
 	}
+	// check keystore type
+	var fsKeystore bool
+	if len(ksLocation) > 0 {
+		ext := filepath.Ext(ksLocation)
+		if ext == ".yaml" {
+			fsKeystore = false
+		} else {
+			fsKeystore = true
+		}
+	}
+
 	// support password based accounts
 	if len(ksLocation) > 0 {
-		backends = append(backends, keystore.NewKeyStore(ksLocation, n, p))
+		if fsKeystore {
+			backends = append(backends, keystore.NewKeyStore(ksLocation, n, p))
+		} else {
+			ks, err := keystore.NewKeyStoreDB(ksLocation, n, p)
+			if err != nil {
+				return nil, err
+			}
+			backends = append(backends, ks)
+		}
 	}
 	if !nousb {
 		// Start a USB hub for Ledger hardware wallets
@@ -162,7 +183,7 @@ func StartClefAccountManager(ksLocation string, nousb, lightKDF bool, scpath str
 	}
 
 	// Start a smart card hub
-	if len(scpath) > 0 {
+	if len(scpath) > 0 && fsKeystore {
 		// Sanity check that the smartcard path is valid
 		fi, err := os.Stat(scpath)
 		if err != nil {
@@ -181,7 +202,7 @@ func StartClefAccountManager(ksLocation string, nousb, lightKDF bool, scpath str
 	}
 
 	// Clef doesn't allow insecure http account unlock.
-	return accounts.NewManager(&accounts.Config{InsecureUnlockAllowed: false}, backends...)
+	return accounts.NewManager(&accounts.Config{InsecureUnlockAllowed: false}, backends...), nil
 }
 
 // MetadataFromContext extracts Metadata from a given context.Context

signer/core/api_test.go

@@ -125,7 +125,10 @@ func setup(ksLoc string, t *testing.T) (*core.SignerAPI, *headlessUi) {
 		t.Fatal(err.Error())
 	}
 	ui := &headlessUi{make(chan string, 20), make(chan string, 20)}
-	am := core.StartClefAccountManager(ksLoc, true, true, "")
+	am, err := core.StartClefAccountManager(ksLoc, true, true, "")
+	if err != nil {
+		t.Fatal(err.Error())
+	}
 	api := core.NewSignerAPI(am, 1337, true, ui, db, true, storage.NewNoStorage())
 	return api, ui
 }