learn_eth/index.html at master · kaustavha/learn_eth · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Ethereum</title>
    <h1>Ethereum static demo</h1>
  </head>
  <body>
    <p>Content:</p>
  </body>
  <script src="assets/web3.min.js"></script>
  <script src="assets/ABI.js"></script>
  <script>
    // Create JS API from contract ABI & bytecode located on rinkeby
    // ABI is defined in <script src="assets/ABI.js">
    var rinkebyAddress = '0xa016a2a7760f7779e5f0c1ae8788415547c67caa';
    function main() {
      greeterContract = window.greeterContract;
        // See what our greeter says
        greeterContract.greet((err, data) => {
          print("Errors: " + err);
          print("Data: " + data);
        });

        greeterContract.getBlockNumber((e,d) => {
          print("Block number: " + d);
        });
    }

    function print(str) {
      document.body.innerHTML += "<pre>" + str + "</pre>";
    }

    // Wait for load event to get metamask injected web3
    window.addEventListener('load', function() {
      // Checking if Web3 has been injected by the browser (Mist/MetaMask)
      if (typeof web3 !== 'undefined') {
        // Use Mist/MetaMask's provider
        window.web3 = new Web3(web3.currentProvider);
        if (window.web3.isConnected()) {
          print("Web3 connected");
        }
      } else {
        print('No web3? You should consider trying MetaMask!');
        // fallback - use your fallback strategy (local node / hosted node + in-dapp id mgmt / fail)
        window.web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));
      }
      window.greeterContract = web3.eth.contract(ABI).at(rinkebyAddress);
      main();
    });
  </script>
</html>