diff --git a/nimbus/evm/async/data_sources/json_rpc_data_source.nim b/nimbus/evm/async/data_sources/json_rpc_data_source.nim
index 317d06127..e41038a4d 100644
--- a/nimbus/evm/async/data_sources/json_rpc_data_source.nim
+++ b/nimbus/evm/async/data_sources/json_rpc_data_source.nim
@@ -13,12 +13,14 @@ import
   eth/p2p,
   eth/p2p/rlpx,
   eth/p2p/private/p2p_types,
-  ../../../sync/protocol,
-  ../../../sync/protocol/eth66 as proto_eth66,
+  ../../../sync/protocol,  
   ../../../db/[db_chain, distinct_tries, incomplete_db, storage_types],
   ../data_sources
 
-from ../../../sync/protocol/eth66 import getNodeData
+when defined(legacy_eth66_enabled):
+  import 
+    ../../../sync/protocol/eth66 as proto_eth66
+  from ../../../sync/protocol/eth66 import getNodeData
 
 from ../../../rpc/rpc_utils import toHash
 from web3 import Web3, BlockHash, BlockObject, FixedBytes, Address, ProofResponse, StorageProof, newWeb3, fromJson, fromHex, eth_getBlockByHash, eth_getBlockByNumber, eth_getCode, eth_getProof, blockId, `%`
diff --git a/nimbus/graphql/ethapi.nim b/nimbus/graphql/ethapi.nim
index f87eef183..5f5e050e4 100644
--- a/nimbus/graphql/ethapi.nim
+++ b/nimbus/graphql/ethapi.nim
@@ -74,7 +74,7 @@ when (NimMajor, NimMinor, NimPatch) >= (1, 6, 0):
   {.push hint[XCannotRaiseY]: off.}
 else:
   {.push hint[XDeclaredButNotUsed]: off.}
-  
+
 proc toHash(n: Node): Hash256 =
   result.data = hexToByteArray[32](n.stringVal)
 
@@ -305,7 +305,7 @@ proc getTxAt(ctx: GraphqlContextRef, header: BlockHeader, index: int): RespResul
       ok(respNull())
   except CatchableError as e:
     err("can't get transaction by index '$1': $2" % [$index, e.msg])
-  except Exception as em:
+  except RlpError as em:
     err("can't get transaction by index '$1': $2" % [$index, em.msg])
 
 proc getTxByHash(ctx: GraphqlContextRef, hash: Hash256): RespResult =
@@ -319,20 +319,28 @@ proc getTxByHash(ctx: GraphqlContextRef, hash: Hash256): RespResult =
     err("can't get transaction by hash '$1': $2" % [hash.data.toHex, em.msg])
 
 proc accountNode(ctx: GraphqlContextRef, header: BlockHeader, address: EthAddress): RespResult =
-  let db = getStateDB(ctx.com, header)
-  when false:
-    # EIP 1767 unclear about non existent account
-    # but hive test case demand something
-    if not db.accountExists(address):
-      return ok(respNull())
-  let acc = db.getAccount(address)
-  ok(accountNode(ctx, acc, address, db))
+  try:
+    let db = getStateDB(ctx.com, header)
+    when false:
+      # EIP 1767 unclear about non existent account
+      # but hive test case demand something
+      if not db.accountExists(address):
+        return ok(respNull())
+    let acc = db.getAccount(address)
+    ok(accountNode(ctx, acc, address, db))
+  except RlpError as ex:
+    err(ex.msg)
 
 proc parseU64(node: Node): uint64 =
   for c in node.intVal:
     result = result * 10 + uint64(c.int - '0'.int)
 
-{.pragma: apiPragma, cdecl, gcsafe, raises: [Defect, CatchableError], locks:0.}
+when (NimMajor, NimMinor) < (1, 6):
+  {.pragma: apiRaises, raises: [Defect, CatchableError].}
+else:
+  {.pragma: apiRaises, raises: [].}
+
+{.pragma: apiPragma, cdecl, gcsafe, apiRaises, locks:0.}
 {.push hint[XDeclaredButNotUsed]: off.}
 
 proc validateHex(x: Node, minLen = 0): NodeResult =
@@ -499,15 +507,23 @@ proc accountTxCount(ud: RootRef, params: Args, parent: Node): RespResult {.apiPr
 proc accountCode(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
   let acc = AccountNode(parent)
-  let code = acc.db.getCode(acc.address)
-  resp(code)
+  try:
+    let code = acc.db.getCode(acc.address)
+    resp(code)
+  except RlpError as ex:
+    err(ex.msg)
 
 proc accountStorage(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
   let acc = AccountNode(parent)
-  let slot = parse(params[0].val.stringVal, UInt256, radix = 16)
-  let (val, _) = acc.db.getStorage(acc.address, slot)
-  byte32Node(val)
+  try:
+    let slot = parse(params[0].val.stringVal, UInt256, radix = 16)
+    let (val, _) = acc.db.getStorage(acc.address, slot)
+    byte32Node(val)
+  except RlpError as ex:
+    err(ex.msg)
+  except ValueError as ex:
+    err(ex.msg)
 
 const accountProcs = {
   # Note: Need to define it as ResolverProc else a proc with noSideEffect is
@@ -899,8 +915,11 @@ proc blockTransactions(ud: RootRef, params: Args, parent: Node): RespResult {.ap
 proc blockTransactionAt(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
   let h = HeaderNode(parent)
-  let index = parseU64(params[0].val)
-  getTxAt(ctx, h.header, index.int)
+  try:
+    let index = parseU64(params[0].val)
+    getTxAt(ctx, h.header, index.int)
+  except ValueError as ex:
+    err(ex.msg)
 
 proc blockLogs(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
@@ -910,8 +929,11 @@ proc blockLogs(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.
 proc blockAccount(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
   let h = HeaderNode(parent)
-  let address = hexToByteArray[20](params[0].val.stringVal)
-  ctx.accountNode(h.header, address)
+  try:
+    let address = hexToByteArray[20](params[0].val.stringVal)
+    ctx.accountNode(h.header, address)
+  except ValueError as ex:
+    err(ex.msg)
 
 const
   fFrom     = 0
@@ -1122,13 +1144,16 @@ proc pickBlockNumber(ctx: GraphqlContextRef, number: Node): BlockNumber =
 
 proc queryAccount(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
-  let address = hexToByteArray[20](params[0].val.stringVal)
-  let blockNumber = pickBlockNumber(ctx, params[1].val)
-  let hres = getBlockByNumber(ctx, blockNumber)
-  if hres.isErr:
-    return hres
-  let h = HeaderNode(hres.get())
-  accountNode(ctx, h.header, address)
+  try:
+    let address = hexToByteArray[20](params[0].val.stringVal)
+    let blockNumber = pickBlockNumber(ctx, params[1].val)
+    let hres = getBlockByNumber(ctx, blockNumber)
+    if hres.isErr:
+      return hres
+    let h = HeaderNode(hres.get())
+    accountNode(ctx, h.header, address)
+  except ValueError as ex:
+    err(ex.msg)
 
 proc queryBlock(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
@@ -1151,7 +1176,8 @@ proc queryBlocks(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragm
   let toNumber = pickBlockNumber(ctx, to)
 
   if fromNumber > toNumber:
-    return err("from($1) is bigger than to($2)" % [fromNumber.toString, toNumber.toString])
+    return err("from(" & fromNumber.toString &
+      ") is bigger than to(" & toNumber.toString & ")")
 
   # TODO: what is the maximum number here?
   if toNumber - fromNumber > 32.toBlockNumber:
@@ -1176,8 +1202,11 @@ proc queryPending(ud: RootRef, params: Args, parent: Node): RespResult {.apiPrag
 
 proc queryTransaction(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
-  let hash = toHash(params[0].val)
-  getTxByHash(ctx, hash)
+  try:
+    let hash = toHash(params[0].val)
+    getTxByHash(ctx, hash)
+  except ValueError as ex:
+    err(ex.msg)
 
 proc queryLogs(ud: RootRef, params: Args, parent: Node): RespResult {.apiPragma.} =
   let ctx = GraphqlContextRef(ud)
@@ -1257,7 +1286,7 @@ type
     names: array[QcNames, Name]
 
 proc calcQC(qc: QueryComplexity, field: FieldRef): int {.cdecl,
-            gcsafe, raises: [Defect, CatchableError].} =
+            gcsafe, apiRaises.} =
   let qc = EthQueryComplexity(qc)
   if field.parentType.sym.name == qc.names[qcType] and
      field.field.name.name == qc.names[qcFields]:
diff --git a/vendor/nim-blscurve b/vendor/nim-blscurve
index 5bd4a0859..d3920425c 160000
--- a/vendor/nim-blscurve
+++ b/vendor/nim-blscurve
@@ -1 +1 @@
-Subproject commit 5bd4a085923d6c3be8ee095d06d1ec8473ebb6aa
+Subproject commit d3920425c5c02b0a7766045c064c888cd5b83e72
diff --git a/vendor/nim-chronicles b/vendor/nim-chronicles
index 14e8537e4..1e6350870 160000
--- a/vendor/nim-chronicles
+++ b/vendor/nim-chronicles
@@ -1 +1 @@
-Subproject commit 14e8537e4aefda832996a187c4acfef8eadb2aeb
+Subproject commit 1e6350870855541b381d77d4659688bc0d2c4227
diff --git a/vendor/nim-chronos b/vendor/nim-chronos
index f7835a192..e05d2f8e9 160000
--- a/vendor/nim-chronos
+++ b/vendor/nim-chronos
@@ -1 +1 @@
-Subproject commit f7835a192b45c37e97614d865141f21eea8c156e
+Subproject commit e05d2f8e9648e17b9a71bf5e909a79241c067c8b
diff --git a/vendor/nim-confutils b/vendor/nim-confutils
index 38dfeaaab..6c6ff76cb 160000
--- a/vendor/nim-confutils
+++ b/vendor/nim-confutils
@@ -1 +1 @@
-Subproject commit 38dfeaaabdc6792d0f4d701621cbe34001978456
+Subproject commit 6c6ff76cb38a3d4fa369a2757769220f2ecf4e64
diff --git a/vendor/nim-eth b/vendor/nim-eth
index ffc3ef3a7..ea3c164a0 160000
--- a/vendor/nim-eth
+++ b/vendor/nim-eth
@@ -1 +1 @@
-Subproject commit ffc3ef3a7cc622166ce578e9ce0346fc0916bfe3
+Subproject commit ea3c164a0018bd62232f27d1554a91e9bdb93840
diff --git a/vendor/nim-faststreams b/vendor/nim-faststreams
index 49e2c52eb..3576a15f1 160000
--- a/vendor/nim-faststreams
+++ b/vendor/nim-faststreams
@@ -1 +1 @@
-Subproject commit 49e2c52eb5dda46b1c9c10d079abe7bffe6cea89
+Subproject commit 3576a15f131367d8a36ffb5627b84bb59728b339
diff --git a/vendor/nim-graphql b/vendor/nim-graphql
index de2f64ff7..07f238bd0 160000
--- a/vendor/nim-graphql
+++ b/vendor/nim-graphql
@@ -1 +1 @@
-Subproject commit de2f64ff7bb039550f99323a17ac0d79b0f96a00
+Subproject commit 07f238bd05f966a3ca4aa5c16c108fc7ecd07ed0
diff --git a/vendor/nim-http-utils b/vendor/nim-http-utils
index e88e231df..aad684d37 160000
--- a/vendor/nim-http-utils
+++ b/vendor/nim-http-utils
@@ -1 +1 @@
-Subproject commit e88e231dfcef4585fe3b2fbd9b664dbd28a88040
+Subproject commit aad684d3758a74c1b327df93da2e956458410b48
diff --git a/vendor/nim-json-serialization b/vendor/nim-json-serialization
index e5b18fb71..f64d55f7f 160000
--- a/vendor/nim-json-serialization
+++ b/vendor/nim-json-serialization
@@ -1 +1 @@
-Subproject commit e5b18fb710c3d0167ec79f3b892f5a7a1bc6d1a4
+Subproject commit f64d55f7ff480ed13eca9c97c15450a2c4106078
diff --git a/vendor/nim-secp256k1 b/vendor/nim-secp256k1
index 4c41c5029..708a739d3 160000
--- a/vendor/nim-secp256k1
+++ b/vendor/nim-secp256k1
@@ -1 +1 @@
-Subproject commit 4c41c5029ffc73b732233f06018cd52f3ed47dce
+Subproject commit 708a739d35f3fb595a83dc6e6cb9edb4c3e5361e
diff --git a/vendor/nim-serialization b/vendor/nim-serialization
index 257e2e02e..bc46b4c1c 160000
--- a/vendor/nim-serialization
+++ b/vendor/nim-serialization
@@ -1 +1 @@
-Subproject commit 257e2e02ebe2efbe86beb05c62a739fc9c3d10e7
+Subproject commit bc46b4c1c1730cc25bf5fb5f3d64bd708a6ad89e
diff --git a/vendor/nim-ssz-serialization b/vendor/nim-ssz-serialization
index 3a6c350f5..3f8946ab2 160000
--- a/vendor/nim-ssz-serialization
+++ b/vendor/nim-ssz-serialization
@@ -1 +1 @@
-Subproject commit 3a6c350f515829af327a4238ba60a384f7a02520
+Subproject commit 3f8946ab2de304a9130aa80874bc2e4025d62303
diff --git a/vendor/nim-stew b/vendor/nim-stew
index c52569abd..67fdc87e2 160000
--- a/vendor/nim-stew
+++ b/vendor/nim-stew
@@ -1 +1 @@
-Subproject commit c52569abd5a7753c1892bf9fc85c71f0c9b6ac45
+Subproject commit 67fdc87e2521f7e021fd521c41d3228810a183d0
diff --git a/vendor/nim-stint b/vendor/nim-stint
index eb1f32c67..94fc521ee 160000
--- a/vendor/nim-stint
+++ b/vendor/nim-stint
@@ -1 +1 @@
-Subproject commit eb1f32c6752478e18dff9256ea45538ab3312cd3
+Subproject commit 94fc521ee0f1e113d09ceeaa3568d4d7a6c0b67d
diff --git a/vendor/nim-toml-serialization b/vendor/nim-toml-serialization
index 2c46429b8..bad61aa6d 160000
--- a/vendor/nim-toml-serialization
+++ b/vendor/nim-toml-serialization
@@ -1 +1 @@
-Subproject commit 2c46429b822347aa2db04e04671988de734d2b78
+Subproject commit bad61aa6db4fd7aa0007c99b07276da55cc097da