web3js_browser/faucet_snippet.html

<!DOCTYPE html>
<html>
    <head>
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <script src="https://unpkg.com/web3@latest/dist/web3.min.js"></script> 
    </head>
    <body>
        <h1>Faucet snippet (select Rinkeby)</h1>
        <pre id="log" style="width:100%;height:200px"></pre>
        <script type="text/javascript">
        function log(logstr) {   
            document.getElementById("log").innerHTML +=logstr+"\n";
        }
        async function f() { 
            web3 = new Web3(Web3.givenProvider); // provider from metamask         
            var acts=await web3.eth.requestAccounts().catch(x=>log(x.message));            
            const privateKey= '0x0da19552d21de3da01e4a5ff72f6722b9a86c78ee6c6a46e5cdcf0fb5a936110'; 
                               // note very insecure, but for test ETH this is usable   
            var addressFaucet = web3.eth.accounts.privateKeyToAccount(privateKey).address; 
            web3.eth.accounts.wallet.add(privateKey);
            var fb=await web3.eth.getBalance(addressFaucet);
            log(`Faucet has ${fb} on address ${addressFaucet}`);
            log(`Wait about 20 seconds for transaction, note: no metamask confirm`);
            result = await  web3.eth.sendTransaction({from: addressFaucet,to: acts[0],gas: 200000,value: 1})
               .catch(x => log(`Error: ${x.code} ${x.message}`));    
            log(`Transaction hash: ${result.transactionHash}`);
            fb=await web3.eth.getBalance(addressFaucet);
            log(`Faucet now has ${fb}`);
        }
        window.addEventListener('DOMContentLoaded', f);  
        </script>        
    </body>
</html>
 
 
  
      
      
      
   