API Errors and Troubleshooting

Example Error Response 
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{
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   "jsonrpc":"2.0",
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   "id":1,
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   "error":{
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      "code":-32602, // this is the reference error code 
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      "message":"invalid argument 0: json: cannot unmarshal hex string of odd length into Go value of type common.Address"
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   }
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}
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A typical error message returned in JSON contains the following key fields.
1.CODE : The JSON-RPC error code, see below for extended description. 
2.MESSAGE : An explanation of what went wrong, and how you can correct it. 
JSON-RPC Error Codes
Code
Return Message
Description
-32700
Parse error
Invalid JSON was received by the server. An error occurred on the server while parsing the JSON text.
-32600
Invalid Request
The JSON sent is not a valid Request object.
-32601
Method not found
The method does not exist / is not available.
-32602
Invalid params
Invalid method parameter(s).
-32603
Internal error
Internal JSON-RPC error.

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Example Error Response

JSON-RPC Error Codes