无法连接到testrpc

Question

我在虚拟机(Ubuntu16.04)上运行了一个testrpc，当我使用松露控制台与它交互时，它正常工作。

我唯一的目标是调用一个智能合同，它只需将乙醚从一个帐户发送到另一个帐户。这是一份明智的合同：

pragma solidity ^0.4.4;

contract Transfer {
    address owner;

    function Transfer () {
        owner = msg.sender;
    }

    function sendEther (address dst) payable {
        if(msg.value<=0) revert();
        dst.transfer(msg.value);
    }
}

我正在尝试使用javascript从web访问函数sendEther。当我在本地访问我的测试网时，一切正常，但现在我无法连接到它。

脚本通过浏览器化进行转换，然后作为一个简单的脚本标记包含在htm文件中。

剧本是这样的：

var Web3 = require('web3');
let web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));

function getParameterByName(name, url) {
    /* irrelevant code here */
}

try
{
    // I have to define "source" this way because web3.eth.accounts[0] is undefined, most likely because there's no connection :(
    var source = "0x8691202f56859bd5362f1033fa64e71cb4eae579"; 
    var abi = [{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"}];
    var contract_addr = getParameterByName("contract");
    var amount = getParameterByName("amount");
    var destination = getParameterByName("destination");
    var contract = new web3.eth.Contract(abi, contract_addr, {from: source, to: destination, value: parseInt(amount)});
    var hash = contract.methods.sendEther(destinatario);


    document.write("<br/> Source: ");
    document.write(source);
    document.write("<br/> Destination: ");
    document.write(destination);
    document.write("<br/><br/><b>ABI:</b> ");
    document.write(JSON.stringify(abi));
    document.write("<br/><br/><b>Contract:</b> ");
    document.write(JSON.stringify(contract));
    document.write("<br/><br/><b>Contract address:</b> ");
    document.write(contract_addr);
    document.write("<br/><br/><b>Amount (weis):</b> ");
    document.write(amount);
    document.write("<br/><br/><b>Transaction hash:</b> ");
    document.write(JSON.stringify(hash));
    document.write("<br/><br/><b>Transaction details:</b> ");
    document.write(JSON.stringify(web3.eth.getTransaction(hash)));
} catch (e) {
    document.write("<br/></br><b>Error: ");
    document.write(e.message);
    document.write("</b>");
}

这是我得到的输出：

Source: 0x8691202f56859bd5362f1033fa64e71cb4eae579

Destination: 0x09b74dc58118140deec480d562651e42ae3b21ad

ABI: [{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},{"inputs":[],"payable":false,"type":"constructor"}]

Contract: {"currentProvider":{"host":"http://localhost:8545","timeout":0,"connected":false},"_requestManager":{"provider":{"host":"http://localhost:8545","timeout":0,"connected":false},"providers":{},"subscriptions":{}},"givenProvider":null,"providers":{},"_provider":{"host":"http://localhost:8545","timeout":0,"connected":false},"_ethereumCall":{},"options":{"from":"0x8691202F56859BD5362f1033FA64E71cb4EaE579","to":"0x09b74dc58118140deec480d562651e42ae3b21ad","value":1000000000000,"address":"0x377D5848c8A7B68D20CcE114f23AD959a62CC9f7","jsonInterface":[{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},{"inputs":[],"payable":false,"type":"constructor"}]},"defaultAccount":null,"defaultBlock":"latest","methods":{},"events":{},"_address":"0x377D5848c8A7B68D20CcE114f23AD959a62CC9f7","_jsonInterface":[{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},{"inputs":[],"payable":false,"type":"constructor"}]}

Contract address: 0x377d5848c8a7b68d20cce114f23ad959a62cc9f7

Amount (weis): 1000000000000

Transaction hash: {"arguments":["0x09b74dc58118140deec480d562651e42ae3b21ad"],"_method":{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},"_parent":{"currentProvider":{"host":"http://localhost:8545","timeout":0,"connected":false},"_requestManager":{"provider":{"host":"http://localhost:8545","timeout":0,"connected":false},"providers":{},"subscriptions":{}},"givenProvider":null,"providers":{},"_provider":{"host":"http://localhost:8545","timeout":0,"connected":false},"_ethereumCall":{},"options":{"from":"0x8691202F56859BD5362f1033FA64E71cb4EaE579","to":"0x09b74dc58118140deec480d562651e42ae3b21ad","value":1000000000000,"address":"0x377D5848c8A7B68D20CcE114f23AD959a62CC9f7","jsonInterface":[{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},{"inputs":[],"payable":false,"type":"constructor"}]},"defaultAccount":null,"defaultBlock":"latest","methods":{},"events":{},"_address":"0x377D5848c8A7B68D20CcE114f23AD959a62CC9f7","_jsonInterface":[{"constant":false,"inputs":[{"name":"dst","type":"address"}],"name":"sendEther","outputs":[],"payable":true,"type":"function","signature":"0x48c981e2"},{"inputs":[],"payable":false,"type":"constructor"}]}}

Transaction details: {"isFulfilled":false,"isRejected":false} 

这就是问题所在..。当我与松露控制台交互时，一切都很好。当我尝试通过网络做同样的事情时，它不会连接。

对这里发生了什么有什么想法吗？

先谢谢你！)

Answer 1

好吧，我找到答案了。我会把它留在这里给任何发现有用的人..。

我没有意识到truffle serve，当我尝试使用它时，它引发了一个错误。

该错误可以通过以下指示来解决：https://github.com/trufflesuite/truffle/issues/448

我终于可以从浏览器中看到我的testrpc！:)