I am new in Blockchain ethereum, I am trying to call a function in contract, using Ganache without Metamask it works. I am trying to test the contract in pre-production in Rinkeby through infura.
I know this can be old API but I am not sure what I am doing wrong, I googled but I dindnt find correct response for it.
the error is : method eth_sendTransaction does not exist/is not available.
here is the contract:
pragma solidity ^0.4.24;
contract Message {
string myMessage;
function setMessage(string x) public {
myMessage = x;
}
function getMessage() public view returns (string) {
return myMessage;
} }
and frontend code all in HTML:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Deploy a Remix Contract</title>
<link rel="stylesheet" type="text/css" href="main.css">
<script src="https://cdn.jsdelivr.net/gh/ethereum/web3.js/dist/web3.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
</head>
<body>
<div>
<h1>Ethereum Secret Messenger</h1>
<hr>
<label for="message">This site writes a secret message to the Ethereum
blockchain!</label>
<input id="userInput" type="text">
<button id="setMessageButton">Set secret message</button>
</div>
<script>
// Connect a the web3 provider
if (typeof web3 !== 'undefined') {
web3 = new Web3(web3.currentProvider);
console.log("Not defined");
} else {
web3 = new Web3(new Web3.providers.HttpProvider("https://rinkeby.infura.io/v3/.....My_Connection"));
console.log("Defined")
}
web3.eth.defaultAccount = web3.eth.accounts[0];
console.log("eth.account " + web3.eth.accounts[0]);
var RemixContract = new web3.eth.Contract([
{
"constant": false,
"inputs": [
{
"name": "x",
"type": "string"
}
],
"name": "setMessage",
"outputs": [],
"payable": false,
"stateMutability": "nonpayable",
"type": "function"
},
{
"constant": true,
"inputs": [],
"name": "getMessage",
"outputs": [
{
"name": "",
"type": "string"
}
],
"payable": false,
"stateMutability": "view",
"type": "function"
}
],'0x.....');
console.log(RemixContract);
$("#setMessageButton").click(function () {
let userMessage = $("#userInput").val()
console.log("user message " + userMessage)
RemixContract.methods.setMessage(userMessage)
.send({from:"0x....."})
.then(console.log);
});
</script>
</body>
</html>
I have another question which it confused me, I use infura to connect to Rinkeby, since infura connect to node in this case probably I dont need Metamask, I can create transaction and sign it with private-key then send it. so using Metamask with infura does it make sense?
