GET
https://ethcall.org/:chainId/:address/:fnSig(arg1,arg2,...)(returnType...)/:arg1,:arg2...
RETURNS
{result:"string | Array<string | Array<string>>"}
GET
https://ethcall.org/:chainId/:address/balance
RETURNS
{"result":"string"}
GET
https://ethcall.org/wei2eth/:value
RETURNS
string
GET
https://ethcall.org/eth2wei/:value
RETURNS
string
GET
https://ethcall.org/chains
RETURNS
Array<{"chainId":"number","chainName":"string"}>