web3 셈플

web3.js

import Web3 from 'web3';

Template.wallMain.helpers({

});

Template.wallMain.events({

});

Template.wallMain.onCreated(function () {




    alice = {
        privateKey:"70fb2482c1d3e3fa0cd4ae22e39151a1fb98d09156ba98721d105d2b57104acd"
        ,address:"0x3B598576755664a4b6f73B6f16BAc4d425715Ca9"
        ,name : "TestAccount1"
    };
    bob = {
        privateKey:"19900d46f119d062c25c5c0aad266baa47d3a7c49a8e68eb0cefab511fc13491"
        ,address:"0xa1bBf60B7149a2fd3bb4D32B46a1c3037B4686Ea"
        ,name : "Account2"
    };

    //web3.eth.accounts.wallet.add(alice.privateKey);

    async function sendEther(){

       let web3 = new Web3(new Web3.providers.WebsocketProvider('wss://ropsten.infura.io/ws'));

       //let web3 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/v3/7adb5edd47cf4c379dad4f9f3b7640ce"));

       balance1 = await web3.eth.getBalance("0x3B598576755664a4b6f73B6f16BAc4d425715Ca9");
       balance2 = await web3.eth.getBalance("0xa1bBf60B7149a2fd3bb4D32B46a1c3037B4686Ea");

       console.log(web3.utils.fromWei(balance1));
       console.log(web3.utils.fromWei(balance2));

       let gasLimit = 21000; //await web3.eth.estimateGas({from:alice.address,to:bob.address,value:1});

       let gasPrice = 1000000000;//await web3.eth.getGasPrice();

       let value = web3.utils.toWei("0.1");
       let nonce = await web3.eth.getTransactionCount('0x3B598576755664a4b6f73B6f16BAc4d425715Ca9');

       let transaction = {
           from:'0x3B598576755664a4b6f73B6f16BAc4d425715Ca9'
           ,to:'0xa1bBf60B7149a2fd3bb4D32B46a1c3037B4686Ea'
           ,gasPrice:gasPrice
           ,gasLimit:gasLimit
           ,value:value
           ,nonce:nonce
       };

       let tx = await web3.eth.accounts.signTransaction(transaction, "70fb2482c1d3e3fa0cd4ae22e39151a1fb98d09156ba98721d105d2b57104acd");

       console.log("트렌젝션 서명 성공.. 다음단계 대기중",tx);

       web3.eth.sendSignedTransaction(tx.rawTransaction.toString('hex'))
       .once('transactionHash', (hash) => {

           console.info('transactionHash', 'https://ropsten.etherscan.io/tx/' + hash);

       }).once('receipt', (receipt) => {

           console.info('receipt', receipt);

       }).on('error', console.error);

    };

    window.sendEther = sendEther;

});

Template.wallMain.onRendered(function () {

});

Template.wallMain.onDestroyed(function () {

});