prevent nodes from starting with a different overlay (#1377)

cmd/bee/cmd/deploy.go

@@ -49,17 +49,22 @@ func (c *command) initDeployCmd() error {
 
 			stateStore, err := node.InitStateStore(logger, dataDir)
 			if err != nil {
-				return
+				return err
 			}
 
 			defer stateStore.Close()
 
 			signerConfig, err := c.configureSigner(cmd, logger)
 			if err != nil {
-				return
+				return err
 			}
 			signer := signerConfig.signer
 
+			err = node.CheckOverlayWithStore(signerConfig.address, stateStore)
+			if err != nil {
+				return err
+			}
+
 			ctx := cmd.Context()
 
 			swapBackend, overlayEthAddress, chainID, transactionService, err := node.InitChain(
@@ -70,7 +75,7 @@ func (c *command) initDeployCmd() error {
 				signer,
 			)
 			if err != nil {
-				return
+				return err
 			}
 			defer swapBackend.Close()
 
@@ -82,7 +87,7 @@ func (c *command) initDeployCmd() error {
 				factoryAddress,
 			)
 			if err != nil {
-				return
+				return err
 			}
 
 			_, err = node.InitChequebookService(
@@ -98,7 +103,7 @@ func (c *command) initDeployCmd() error {
 				swapInitialDeposit,
 			)
 
-			return
+			return err
 		},
 		PreRunE: func(cmd *cobra.Command, args []string) error {
 			return c.config.BindPFlags(cmd.Flags())

cmd/bee/cmd/init.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"github.com/ethersphere/bee/pkg/logging"
+	"github.com/ethersphere/bee/pkg/node"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
@@ -41,8 +42,20 @@ func (c *command) initInitCmd() (err error) {
 				return fmt.Errorf("unknown verbosity level %q", v)
 			}
 
-			_, err = c.configureSigner(cmd, logger)
+			signerConfig, err := c.configureSigner(cmd, logger)
+			if err != nil {
 				return err
+			}
+
+			dataDir := c.config.GetString(optionNameDataDir)
+			stateStore, err := node.InitStateStore(logger, dataDir)
+			if err != nil {
+				return err
+			}
+
+			defer stateStore.Close()
+
+			return node.CheckOverlayWithStore(signerConfig.address, stateStore)
 		},
 		PreRunE: func(cmd *cobra.Command, args []string) error {
 			return c.config.BindPFlags(cmd.Flags())

pkg/node/node.go

@@ -167,6 +167,11 @@ func NewBee(addr string, swarmAddress swarm.Address, publicKey ecdsa.PublicKey,
 	}
 	b.stateStoreCloser = stateStore
 
+	err = CheckOverlayWithStore(swarmAddress, stateStore)
+	if err != nil {
+		return nil, err
+	}
+
 	addressbook := addressbook.New(stateStore)
 
 	var swapBackend *ethclient.Client

pkg/node/statestore.go

@@ -5,12 +5,15 @@
 package node
 
 import (
+	"errors"
+	"fmt"
 	"path/filepath"
 
 	"github.com/ethersphere/bee/pkg/logging"
 	"github.com/ethersphere/bee/pkg/statestore/leveldb"
 	"github.com/ethersphere/bee/pkg/statestore/mock"
 	"github.com/ethersphere/bee/pkg/storage"
+	"github.com/ethersphere/bee/pkg/swarm"
 )
 
 // InitStateStore will initialze the stateStore with the given path to the
@@ -24,3 +27,22 @@ func InitStateStore(log logging.Logger, dataDir string) (ret storage.StateStorer
 	}
 	return leveldb.NewStateStore(filepath.Join(dataDir, "statestore"), log)
 }
+
+const overlayKey = "overlay"
+
+// CheckOverlayWithStore checks the overlay is the same as stored in the statestore
+func CheckOverlayWithStore(overlay swarm.Address, storer storage.StateStorer) error {
+	var storedOverlay swarm.Address
+	err := storer.Get(overlayKey, &storedOverlay)
+	if err != nil {
+		if !errors.Is(err, storage.ErrNotFound) {
+			return err
+		}
+		return storer.Put(overlayKey, overlay)
+	}
+
+	if !storedOverlay.Equal(overlay) {
+		return fmt.Errorf("overlay address changed. was %s before but now is %s", storedOverlay, overlay)
+	}
+	return nil
+}