I am currently trying to call a function on my smart contract
function adopt(uint petId) public returns (uint) that has already been deployed to the ropsten network...
but here's the catch. I'm trying to call and sign this contract using the json rpc call
eth_sendRawTransaction() and I have to do this without any additional libraries besides js like ethereumjs-tx or web3js. Would anyone have any idea how to do this with just the json rpc call? Thanks!