From 70c539c8d7f21ecbbbfff0cf3b280e62fa76cfdc Mon Sep 17 00:00:00 2001
From: n0cte <ilnur.a.g@gmail.com>
Date: Thu, 19 Aug 2021 11:47:42 +0300
Subject: [PATCH] fix encoding when storage is empty

---
 pkg/eth/api.go         | 3 +++
 pkg/graphql/graphql.go | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/pkg/eth/api.go b/pkg/eth/api.go
index e9e9c922..2c0ca3ab 100644
--- a/pkg/eth/api.go
+++ b/pkg/eth/api.go
@@ -709,6 +709,9 @@ func (pea *PublicEthAPI) localGetBalance(ctx context.Context, address common.Add
 func (pea *PublicEthAPI) GetStorageAt(ctx context.Context, address common.Address, key string, blockNrOrHash rpc.BlockNumberOrHash) (hexutil.Bytes, error) {
 	storageVal, err := pea.B.GetStorageByNumberOrHash(ctx, address, common.HexToHash(key), blockNrOrHash)
 	if storageVal != nil && err == nil {
+		if len(storageVal) == 0 {
+			return make([]byte, 32), nil
+		}
 		var value common.Hash
 		_, content, _, err := rlp.Split(storageVal)
 		if err == io.ErrUnexpectedEOF {
diff --git a/pkg/graphql/graphql.go b/pkg/graphql/graphql.go
index d12838e2..561abc29 100644
--- a/pkg/graphql/graphql.go
+++ b/pkg/graphql/graphql.go
@@ -1010,6 +1010,9 @@ func (r *Resolver) GetStorageAt(ctx context.Context, args struct {
 
 		return nil, err
 	}
+	if len(rlpValue) == 0 {
+		return &StorageResult{value: make([]byte, 32), cid: cid, ipldBlock: ipldBlock}, nil
+	}
 
 	var value interface{}
 	err = rlp.DecodeBytes(rlpValue, &value)