Add No Eth client error

node/node.go

@@ -188,7 +188,7 @@ func New(cfg *Config, version string) (*Node, error) { //nolint:gocyclo,funlen
 
 	rpcHandler := rpc.New(chain, syncReader, throttledVM, version, log).WithGateway(gatewayClient).WithFeeder(client)
 	if cfg.EthNode == "" {
-		log.Warnw("Ethereum node address not found; will not serve starknet_getMessageStatus") // Todo
+		log.Warnw(rpc.ErrL1ClientNotFound.Message)
 	} else {
 		ethClient, err := l1.NewETHClient(cfg.EthNode)
 		if err != nil {

rpc/l1.go

@@ -11,6 +11,8 @@ import (
 	"golang.org/x/crypto/sha3"
 )
 
+var ErrL1ClientNotFound = jsonrpc.Err(jsonrpc.InternalError, fmt.Errorf("L1 client not found, cannot serve starknet_getMessage"))
+
 type LogMessageToL2 struct {
 	FromAddress *common.Address
 	ToAddress   *common.Address
@@ -56,7 +58,7 @@ func (h *Handler) GetMessageStatus(ctx context.Context, l1TxnHash *common.Hash)
 	if rpcErr != nil {
 		return nil, rpcErr
 	}
-	// (l1 handler) msg hashes -> l1 handler txn hashes, etc
+	// (l1 handler) msg hashes -> l1 handler txn hashes
 	results := make([]MsgStatus, len(msgHashes))
 	for i, msgHash := range msgHashes {
 		hash, err := h.bcReader.L1HandlerTxnHash(msgHash)
@@ -77,12 +79,15 @@ func (h *Handler) GetMessageStatus(ctx context.Context, l1TxnHash *common.Hash)
 }
 
 func (h *Handler) messageToL2Logs(ctx context.Context, txHash *common.Hash) ([]*common.Hash, *jsonrpc.Error) {
-	logMsgToL2SigHash := common.HexToHash("0xdb80dd488acf86d17c747445b0eabb5d57c541d3bd7b6b87af987858e5066b2b")
+	if h.ethClient == nil {
+		return nil, ErrL1ClientNotFound
+	}
 
 	receipt, err := h.ethClient.TransactionReceipt(ctx, *txHash)
 	if err != nil {
 		return nil, ErrTxnHashNotFound
 	}
+	logMsgToL2SigHash := common.HexToHash("0xdb80dd488acf86d17c747445b0eabb5d57c541d3bd7b6b87af987858e5066b2b")
 
 	var messageHashes []*common.Hash
 	for _, vLog := range receipt.Logs {