This is an example call for eth_totalSupply.
{
"jsonrpc": "2.0",
"id": "1",
"method": "eth_totalSupply",
"params": [
"latest"
]
}
{
"jsonrpc": "2.0",
"id": "1",
"error": {
"code": -32601,
"message": "The method eth_totalSupply does not exist/is not available"
}
}