diff --git a/nimbus/debug.nim b/nimbus/debug.nim
new file mode 100644
index 000000000..8b74fccfe
--- /dev/null
+++ b/nimbus/debug.nim
@@ -0,0 +1,37 @@
+import
+  std/[options, times],
+  eth/common,
+  stew/byteutils
+
+proc `$`(hash: Hash256): string =
+  hash.data.toHex
+
+proc `$`(address: openArray[byte]): string =
+  address.toHex
+
+proc `$`(bloom: BloomFilter): string =
+  bloom.toHex
+
+proc `$`(nonce: BlockNonce): string =
+  nonce.toHex
+
+proc debug*(h: BlockHeader): string =
+  result.add "parentHash : " & $h.parentHash  & "\n"
+  result.add "ommersHash : " & $h.ommersHash  & "\n"
+  result.add "coinbase   : " & $h.coinbase    & "\n"
+  result.add "stateRoot  : " & $h.stateRoot   & "\n"
+  result.add "txRoot     : " & $h.txRoot      & "\n"
+  result.add "receiptRoot: " & $h.receiptRoot & "\n"
+  result.add "bloom      : " & $h.bloom       & "\n"
+  result.add "difficulty : " & $h.difficulty  & "\n"
+  result.add "blockNumber: " & $h.blockNumber & "\n"
+  result.add "gasLimit   : " & $h.gasLimit    & "\n"
+  result.add "gasUsed    : " & $h.gasUsed     & "\n"
+  result.add "timestamp  : " & $h.timestamp.toUnix   & "\n"
+  result.add "extraData  : " & $h.extraData   & "\n"
+  result.add "mixDigest  : " & $h.mixDigest   & "\n"
+  result.add "nonce      : " & $h.nonce       & "\n"
+  result.add "fee.isSome : " & $h.fee.isSome  & "\n"
+  if h.fee.isSome:
+    result.add "fee        : " & $h.fee.get()   & "\n"
+  result.add "blockHash  : " & $blockHash(h) & "\n"