import abi from './EthAbi.js'
const Web3 = require('web3');
var Tx = require('ethereumjs-tx');

var web3=  new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161"));;

let eth = {
	//获取主币eth余额
	getBalance: async function(address) {	
		console.log("余额：",balance)
		let balance = await web3.eth.getBalance(address);
		
		return Number(balance) / Math.pow(10, 18);
		
	}
	,getTokenBalance: function(address,contract,resultfun){
		
		var myContract = new web3.eth.Contract(abi, contract, {
		    from: address
		});
		console.log(myContract);
		
		myContract.methods.decimals().call()
		  .then(function(decimals) {
			  myContract.methods.balanceOf(address).call()
			    .then(function(balance) {
			      resultfun(Number(balance) / Math.pow(10, decimals));
			    });
		   
		  });
		
	}
	,transaction: function(fromAddress,toAddress,value,privateKey){
		
		// 先获取当前账号交易的nonce
		web3.eth.getTransactionCount(fromAddress, web3.eth.defaultBlock.pending).then(function(nonce){
		 
		    
		    // 获取交易数据
		    var txData = {
		        // nonce每次++，以免覆盖之前pending中的交易
		        nonce: web3.utils.toHex(nonce++),
		        // 设置gasLimit和gasPrice
		        gasLimit: web3.utils.toHex(60000),
		        gasPrice: web3.utils.toHex(web3.eth.getGasPrice()),  
		        // 要转账的哪个账号  
		        to: toAddress,
		        // 从哪个账号转
		        from: fromAddress,
		        // 0.001 以太币
		        value: web3.utils.toHex(web3.utils.toWei(value, 'ether')),         
		        data: '0x' + Buffer.from('asd').toString('hex')
		    }

		    var tx = new Tx(txData,{'chain':'ropsten'});
		 
		    // 引入私钥，并转换为16进制
		 
		    // 用私钥签署交易
			console.log(Buffer.from(privateKey, 'hex'))
		    tx.sign( new Buffer(privateKey, 'hex'));
		 
		    // 序列化
		    var serializedTx = tx.serialize().toString('hex');
		 
		    web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'), function(err, hash) {
		        if (!err) {
		            console.log(hash);
		        } else {
		            console.error(err);
		        }
		    });
		});
		
	}
}
export default eth;