move some native procs from the libsecp256k1 module to main native module

eth_keys.nim

@@ -25,6 +25,20 @@ when not defined(native):
     ## Return current error message.
     result = libsecp256k1ErrorMsg()
 
+proc isZeroKey*(seckey: PrivateKey): bool =
+  ## Check if private key `seckey` contains only 0 bytes.
+  result = true
+  for i in seckey.data:
+    if i != byte(0):
+      result = false
+
+proc isZeroKey*(pubkey: PublicKey): bool =
+  ## Check if public key `pubkey` contains only 0 bytes.
+  result = true
+  for i in pubkey.data:
+    if i != byte(0):
+      result = false
+
 proc signMessage*(seckey: PrivateKey,
                   data: openarray[byte]): Signature {.inline.} =
   ## Sign message of arbitrary length `data` using private key `seckey`.

eth_keys/libsecp256k1.nim

@@ -319,16 +319,3 @@ proc signRawMessage*(data: openarray[byte], seckey: PrivateKey,
     return(EthKeysStatus.Error)
   return(EthKeysStatus.Success)
 
-proc isZeroKey*(seckey: PrivateKey): bool =
-  ## Check if private key `seckey` contains only 0 bytes.
-  result = true
-  for i in seckey.data:
-    if i != byte(0):
-      result = false
-
-proc isZeroKey*(pubkey: PublicKey): bool =
-  ## Check if public key `pubkey` contains only 0 bytes.
-  result = true
-  for i in pubkey.data:
-    if i != byte(0):
-      result = false