This is an example call for eth_getBalance
.
{ "jsonrpc": "2.0", "id": "1", "method": "eth_getBalance", "params": [ "0x1234" ] }
{ "jsonrpc": "2.0", "id": "1", "error": { "code": -32602, "message": "invalid argument 0: hex string has length 4, want 40 for common.Address" } }