add error message.

pkg/node/node.go

@@ -345,7 +345,9 @@ func NewBee(addr string, publicKey *ecdsa.PublicKey, signer crypto.Signer, netwo
 		return nil, fmt.Errorf("invalid block hash: %w", err)
 	}
 
-	b.UpdateTxNextBlock(common.Bytes2Hex(txHash), common.Bytes2Hex(blockHash))
+	if err := b.UpdateTxNextBlock(common.Bytes2Hex(txHash), common.Bytes2Hex(blockHash)); err != nil {
+		logger.Errorf("update txNextBlock failed: %v\n", err)
+	}
 
 	swarmAddress, err := crypto.NewOverlayAddress(*pubKey, networkID, blockHash)
 

pkg/node/persistconfig.go

@@ -56,8 +56,8 @@ func (c *Bee) GetNextBlock(txhash string) string {
 	return ""
 }
 
-func (c *Bee) UpdateTxNextBlock(txhash string, nextBlock string) {
+func (c *Bee) UpdateTxNextBlock(txhash string, nextBlock string) (err error) {
 	c.persistCfg.ChequeBookTx = txhash
 	c.persistCfg.TxNextBlockHash = nextBlock
-	c.SavePersistConfig()
+	return c.SavePersistConfig()
 }