如何通过 Geth、Node.js 和 UNIX/PHP 访问以太坊节点

geeker 的个人博客 / 1 / 0 / 创建于 6年前

本文旨在说明通过 Geth、Node.js 如何访问以太坊节点和 UNIX 下 PHP 如何访问以太坊节点。

说明如何通过 RPC 使用此（A）以太坊节点#

对于以太坊主网络使用 RPC url：http://85.214.51.53:8545

对于 Ropsten 测试网络使用 RPC url：http://85.214.51.53:8546

通过本地系统上的 “geth” 访问节点：#

1. 确保你的本地 IP 已在你的用户配置文件中注册。使用 RPC 服务时，不会阻止从此 IP 访问。
2. 在本地系统上安装 geth 二进制文件约 30MB，geth 二进制文件包。
3. 查找 geth 目录位置
4. 使用命令./geth attach rpc:http://85.214.51.53:8545 连接并启动 JavaScript 环境，参考文档。
5. 控制台正在启动，你会看到 > 作为输入提示符。
6. 写 eth.getBlock(10000) 并获取块信息作为结果，参考文档。

你的系统在几分钟内运行，无需安装已经 500GB 以上的以太坊区块链！

故障排除：#

安装正确的 geth 二进制文件。
验证 geth 在本地系统上是否可用。
检查用户配置文件中的 IP。
确认没有个人防火墙阻止你的发送出去请求。

尝试 Ropsten 测试网络：#

通过本地系统或服务器上的 node.js 访问节点#

1. 这将返回一个 webserver 响应并输出一个 html 文件。
2. 在 node.js 系统中通过 NPM 或其他方式安装 web3。
3. 将服务器文件指向 app.js。

这将为你带来一个帐户余额（钱包）的输出。

文件：app.js#

const http = require('http');
const walletAddress = '0xDED5f23C157aCef931946D9A695cAc3eF1AaaA8D';

var Web3 = require('web3');
var web3 = new Web3();

web3.setProvider(new web3.providers.HttpProvider('http://85.214.51.53:8545'));

var balance = web3.eth.getBalance('0xDED5f23C157aCef931946D9A695cAc3eF1AaaA8D');

http.createServer(function(request, response) {
    response.writeHead(200, {'Content-Type': 'text/html'});
    response.end("<!DOCTYPE html>\n" +
        "<html lang=\"en\">\n" +
        "<head>\n" +
        "    <meta charset=\"UTF-8\">\n" +
        "    <title>ethernode.biz</title>\n" +
        "</head>\n" +
        "<body>\n" +
        "<p>ethernode.biz</p>" +
        "<center>\n" +
        "</center>\n " +
        "<p> Ethereum balance : " + balance +"</p>\n" +
        "</body>\n" +
        "</html>\n");
}).listen(process.env.PORT);

在 Unix 系统上通过 PHP 访问节点#

1. 确保你的 geth 通过 RPC 正常工作。
2. 在 geth_rpc_getblock.js 下的 Unix 系统上保存以下 shell 脚本。确保你具有执行它的正确权限。
3. 在脚本中调整 geth 命令的路径。
4. 检查命令./geth_rpc_getblock.js 是否会带来一些正确的输出。它应返回类似 Data::QBIT=27867000000;WETH=0;ETH=0.002650772 的内容。
5. 将下面保存在同一目录下的 geth_access.phpPHP 脚本。
6. 将 $shellstring 中的路径调整为脚本文件位置。
7.php 脚本应该回显脚本的输出。Data::QBIT=27867000000;WETH=0;ETH=0.002650772。

你说对了！请记住，从长远来看，使用 php shell_exec 命令访问 geth 并不是很省事。

文件：geth_rpc_getblock.js#

#!/bin/sh
# ------------------------------------------------------------------------------
# Qubitica.net
# ------------------------------------------------------------------------------

# Don't define PARAM to use the standard IPC comms
# Use below to connect to RPC port

PARAM="rpc:http://85.214.51.53:8545"

/var/www/vhosts/ethernode.info/php/geth attach $PARAM << EOF | grep "Data:" | sed "s/Data: //"

var erc20ABI = [{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"burn","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_value","type":"uint256"}],"name":"burnFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_extraData","type":"bytes"}],"name":"approveAndCall","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"},{"name":"","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Burn","type":"event"}];

//var QBITWalletAddress = "$1"; You may pass a parameter from the php call into this $1.

var QBITContractAddress1 = "0xCb5ea3c190d8f82DEADF7ce5Af855dDbf33e3962";
var QBITContractAddress2 = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2";

var QBITWalletAddress = "0x842286ea00502f8e5b1ea40d17ebc4b70becda08";

var QBITContract1= web3.eth.contract(erc20ABI).at(QBITContractAddress1);
var QBITContract2= web3.eth.contract(erc20ABI).at(QBITContractAddress2);

var acctBal = web3.fromWei(eth.getBalance(QBITWalletAddress), "ether");
totalBal += parseFloat(acctBal);

var QBITbalanceOf = QBITContract1.balanceOf(QBITWalletAddress);
var WETHbalanceOf = QBITContract2.balanceOf(QBITWalletAddress);

console.log("Data:"+":QBIT="+  QBITbalanceOf +";WETH="+  WETHbalanceOf +";ETH="+  acctBal);

exit;
<<<<< New File

PHP 脚本：geth_access.php#

<?php
$shellstring= "./geth_rpc_getblock.js";
$output=shell_exec($shellstring);
echo "$output";
?>

故障排除#

shell 脚本对 Windows 换行符很敏感或返回 \n\lf
检查权限

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汇智网原创翻译，转载请标明出处。这里是原文如何通过 Geth、Node.js 和 UNIX/PHP 访问以太坊节点

geth node.js php unix 以太坊区块链