diff --git a/example/block-scan/main.go b/example/block-scan/main.go
index da30c3f5..ccf8e3ad 100644
--- a/example/block-scan/main.go
+++ b/example/block-scan/main.go
@@ -42,6 +42,9 @@ func getNotSeenShards(ctx context.Context, api ton.APIClientWrapped, shard *ton.
 	return ret, nil
 }
 
+// FYI: You can find more advanced, optimized and parallelized block scanner in payment network implementation:
+// https://github.com/xssnick/ton-payment-network/blob/master/tonpayments/chain/block-scan.go
+
 func main() {
 	client := liteclient.NewConnectionPool()
 
diff --git a/tl/loader.go b/tl/loader.go
index 83b200a2..762d6ea2 100644
--- a/tl/loader.go
+++ b/tl/loader.go
@@ -319,7 +319,7 @@ func serializeField(tags []string, value reflect.Value) (buf []byte, err error)
 		} else if value.Type() == cellArrType {
 			cells := value.Interface().([]*cell.Cell)
 			if num > 0 && num != len(cells) {
-				return nil, fmt.Errorf("incorrect cells len in field %s", value.Type().String())
+				return nil, fmt.Errorf("incorrect cells len %d in field %s", len(cells), value.Type().String())
 			}
 			return ToBytes(cell.ToBOCWithFlags(cells, false)), nil
 		}
@@ -528,7 +528,7 @@ func parseField(data []byte, tags []string, value *reflect.Value) (_ []byte, err
 			return data, nil
 		} else if value.Type() == cellArrType {
 			if num > 0 && num != len(cells) {
-				return nil, fmt.Errorf("incorrect cells len in field %s", value.Type().String())
+				return nil, fmt.Errorf("incorrect cells len %d in field %s", len(cells), value.Type().String())
 			}
 			value.Set(reflect.ValueOf(cells))
 			return data, nil
diff --git a/ton/block.go b/ton/block.go
index b54557e1..48d57c43 100644
--- a/ton/block.go
+++ b/ton/block.go
@@ -174,7 +174,7 @@ type ZeroStateIDExt struct {
 
 type AllShardsInfo struct {
 	ID    *BlockIDExt  `tl:"struct"`
-	Proof []*cell.Cell `tl:"cell 2"`
+	Proof []*cell.Cell `tl:"cell"`
 	Data  *cell.Cell   `tl:"cell"`
 }
 
@@ -524,28 +524,46 @@ func (c *APIClient) GetBlockShardsInfo(ctx context.Context, master *BlockIDExt)
 		}
 
 		if c.proofCheckPolicy != ProofCheckPolicyUnsafe {
-			shardState, err := CheckBlockShardStateProof(t.Proof, master.RootHash)
-			if err != nil {
-				return nil, fmt.Errorf("failed to check proof: %w", err)
+			if len(t.Proof) == 0 {
+				return nil, fmt.Errorf("empty proof")
 			}
 
-			mcShort := shardState.McStateExtra.BeginParse()
-			if v, err := mcShort.LoadUInt(16); err != nil || v != 0xcc26 {
-				return nil, fmt.Errorf("invalic mc extra in proof")
-			}
+			switch len(t.Proof) {
+			case 1:
+				blockProof, err := CheckBlockProof(t.Proof[0], master.RootHash)
+				if err != nil {
+					return nil, fmt.Errorf("failed to check proof: %w", err)
+				}
 
-			dictProof, err := mcShort.LoadMaybeRef()
-			if err != nil {
-				return nil, fmt.Errorf("failed to load dict proof: %w", err)
-			}
+				if blockProof.Extra == nil || blockProof.Extra.Custom == nil || !bytes.Equal(blockProof.Extra.Custom.ShardHashes.AsCell().Hash(0), t.Data.MustPeekRef(0).Hash()) {
+					return nil, fmt.Errorf("incorrect proof")
+				}
+			case 2: // old LS compatibility
+				shardState, err := CheckBlockShardStateProof(t.Proof, master.RootHash)
+				if err != nil {
+					return nil, fmt.Errorf("failed to check proof: %w", err)
+				}
 
-			if dictProof == nil && inf.ShardHashes.IsEmpty() {
-				return []*BlockIDExt{}, nil
-			}
+				mcShort := shardState.McStateExtra.BeginParse()
+				if v, err := mcShort.LoadUInt(16); err != nil || v != 0xcc26 {
+					return nil, fmt.Errorf("invalic mc extra in proof")
+				}
+
+				dictProof, err := mcShort.LoadMaybeRef()
+				if err != nil {
+					return nil, fmt.Errorf("failed to load dict proof: %w", err)
+				}
 
-			if (dictProof == nil) != inf.ShardHashes.IsEmpty() ||
-				!bytes.Equal(dictProof.MustToCell().Hash(0), t.Data.MustPeekRef(0).Hash()) {
-				return nil, fmt.Errorf("incorrect proof")
+				if dictProof == nil && inf.ShardHashes.IsEmpty() {
+					return []*BlockIDExt{}, nil
+				}
+
+				if (dictProof == nil) != inf.ShardHashes.IsEmpty() ||
+					!bytes.Equal(dictProof.MustToCell().Hash(0), t.Data.MustPeekRef(0).Hash()) {
+					return nil, fmt.Errorf("incorrect proof")
+				}
+			default:
+				return nil, fmt.Errorf("incorrect proof roots num")
 			}
 		}
 
diff --git a/ton/jetton/integration_test.go b/ton/jetton/integration_test.go
index cae66635..d7c4170d 100644
--- a/ton/jetton/integration_test.go
+++ b/ton/jetton/integration_test.go
@@ -131,6 +131,12 @@ func TestJettonMasterClient_Transfer(t *testing.T) {
 		panic(err)
 	}
 
+	// wait next block to be sure everything updated
+	block, err = api.WaitForBlock(block.SeqNo + 3).GetMasterchainInfo(ctx)
+	if err != nil {
+		t.Fatal("Wait master err:", err.Error())
+	}
+
 	b2, err := tokenWallet.GetBalanceAtBlock(ctx, block)
 	if err != nil {
 		t.Fatal(err)
diff --git a/ton/nft/integration_test.go b/ton/nft/integration_test.go
index b5dc262b..cf63a473 100644
--- a/ton/nft/integration_test.go
+++ b/ton/nft/integration_test.go
@@ -108,6 +108,12 @@ func Test_NftMintTransfer(t *testing.T) {
 		t.Fatal("Send err:", err.Error())
 	}
 
+	// wait next block to be sure everything updated
+	block, err = api.WaitForBlock(block.SeqNo + 3).GetMasterchainInfo(ctx)
+	if err != nil {
+		t.Fatal("Wait master err:", err.Error())
+	}
+
 	newData, err := nft.GetNFTDataAtBlock(ctx, block)
 	if err != nil {
 		t.Fatal("GetNFTData err:", err.Error())
diff --git a/ton/payments/integration_test.go b/ton/payments/integration_test.go
index d8f2ef20..6fa6dde9 100644
--- a/ton/payments/integration_test.go
+++ b/ton/payments/integration_test.go
@@ -73,6 +73,11 @@ func TestClient_DeployAsyncChannel(t *testing.T) {
 		t.Fatal(fmt.Errorf("failed to deploy channel: %w", err))
 	}
 
+	block, err = client.api.WaitForBlock(block.SeqNo + 3).GetMasterchainInfo(context.Background())
+	if err != nil {
+		t.Fatal(fmt.Errorf("failed to wait block: %w", err))
+	}
+
 	ch, err := client.GetAsyncChannel(context.Background(), block, channelAddr, true)
 	if err != nil {
 		t.Fatal(fmt.Errorf("failed to get channel: %w", err))
diff --git a/ton/wallet/integration_test.go b/ton/wallet/integration_test.go
index dfc85c38..b8e3fe2c 100644
--- a/ton/wallet/integration_test.go
+++ b/ton/wallet/integration_test.go
@@ -170,7 +170,7 @@ func TestWallet_DeployContract(t *testing.T) {
 	}
 	t.Logf("contract address: %s", addr.String())
 
-	res, err := api.RunGetMethod(ctx, block, addr, "dappka", 5, 10)
+	res, err := api.WaitForBlock(block.SeqNo+1).RunGetMethod(ctx, block, addr, "dappka", 5, 10)
 	if err != nil {
 		t.Fatal("run err:", err)
 	}