jsonrpc: move error handling to separate module

ethers/providers/jsonrpc.nim

@@ -11,10 +11,12 @@ import ../signer
 import ./jsonrpc/rpccalls
 import ./jsonrpc/conversions
 import ./jsonrpc/subscriptions
+import ./jsonrpc/errors
 
 export basics
 export provider
 export chronicles
+export errors.JsonRpcProviderError
 
 {.push raises: [].}
 
@@ -26,7 +28,6 @@ type
     client: Future[RpcClient]
     subscriptions: Future[JsonRpcSubscriptions]
 
-  JsonRpcProviderError* = object of ProviderError
   JsonRpcSubscription* = ref object of Subscription
     subscriptions: JsonRpcSubscriptions
     id: JsonNode
@@ -37,23 +38,6 @@ type
     address: ?Address
   JsonRpcSignerError* = object of SignerError
 
-proc raiseJsonRpcProviderError(
-  message: string) {.raises: [JsonRpcProviderError].} =
-
-  var message = message
-  if json =? JsonNode.fromJson(message):
-    if "message" in json:
-      message = json{"message"}.getStr
-  raise newException(JsonRpcProviderError, message)
-
-template convertError(body) =
-  try:
-    body
-  except JsonRpcError as error:
-    raiseJsonRpcProviderError(error.msg)
-  except CatchableError as error:
-    raiseJsonRpcProviderError(error.msg)
-
 # Provider
 
 const defaultUrl = "http://localhost:8545"

ethers/providers/jsonrpc/errors.nim

@@ -0,0 +1,27 @@
+import pkg/stew/byteutils
+import ../../provider
+import ./conversions
+
+type JsonRpcProviderError* = object of ProviderError
+
+func new(_: type JsonRpcProviderError, json: JsonNode): ref JsonRpcProviderError =
+  let error = (ref JsonRpcProviderError)()
+  if "message" in json:
+    error.msg = json{"message"}.getStr
+  error
+
+proc raiseJsonRpcProviderError*(
+  message: string) {.raises: [JsonRpcProviderError].} =
+  if json =? JsonNode.fromJson(message):
+    raise JsonRpcProviderError.new(json)
+  else:
+    raise newException(JsonRpcProviderError, message)
+
+template convertError*(body) =
+  try:
+    body
+  except JsonRpcError as error:
+    raiseJsonRpcProviderError(error.msg)
+  except CatchableError as error:
+    raiseJsonRpcProviderError(error.msg)
+