<!--{subtemplate common/header_common}-->	<!--{if $_GET['mod'] == 'viewthread' && !empty($_G['tid'])}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/thread-{$_G['tid']}-1-1.html" />
	<!--{elseif $_GET['mod'] == 'forumdisplay' && !empty($_G['fid'])}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/forum-{$_G['fid']}-1.html" />
	<!--{elseif $_GET['mod'] == 'guide'}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/guide/" />
	<!--{elseif $_G['basescript'] == 'forum' && (empty($_GET['mod']) || $_GET['mod'] == 'index')}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/" />
	<!--{/if}-->
	r`n`t<meta name="application-name" content="$_G['setting']['bbname']" />
	<meta name="msapplication-tooltip" content="$_G['setting']['bbname']" />
	<!--{if $_G['setting']['portalstatus']}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][1]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['portal']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['portal'] : $_G[siteurl].'portal.php'};icon-uri={$_G[siteurl]}{IMGDIR}/portal.ico" /><!--{/if}-->
	<meta name="msapplication-task" content="name=$_G['setting']['navs'][2]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['forum']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['forum'] : $_G[siteurl].'forum.php'};icon-uri={$_G[siteurl]}{IMGDIR}/bbs.ico" />
	<!--{if $_G['setting']['groupstatus']}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][3]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['group']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['group'] : $_G[siteurl].'group.php'};icon-uri={$_G[siteurl]}{IMGDIR}/group.ico" /><!--{/if}-->
	<!--{if helper_access::check_module('feed')}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][4]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['home']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['home'] : $_G[siteurl].'home.php'};icon-uri={$_G[siteurl]}{IMGDIR}/home.ico" /><!--{/if}-->
	<!--{if $_G['basescript'] == 'forum' && $_G['setting']['archiver']}-->
		<link rel="archives" title="$_G['setting']['bbname']" href="{$_G[siteurl]}archiver/" />
	<!--{/if}-->
	<!--{if !empty($rsshead)}-->$rsshead<!--{/if}-->
	<!--{if widthauto()}-->
		<link rel="stylesheet" id="css_widthauto" type="text/css" href='{$_G['setting']['csspath']}{STYLEID}_widthauto.css?{VERHASH}' />
		<script type="text/javascript">HTMLNODE.className += ' widthauto'</script>
	<!--{/if}-->
	<!--{if $_G['basescript'] == 'forum' || $_G['basescript'] == 'group'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}forum.js?{VERHASH}"></script>
	<!--{elseif $_G['basescript'] == 'home'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}home.js?{VERHASH}"></script>
	<!--{elseif $_G['basescript'] == 'portal'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}portal.js?{VERHASH}"></script>
	<!--{/if}-->
	<!--{if $_G['basescript'] != 'portal' && $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}portal.js?{VERHASH}"></script>
	<!--{/if}-->
	<!--{if $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<link rel="stylesheet" type="text/css" id="diy_common" href="{$_G['setting']['csspath']}{STYLEID}_css_diy.css?{VERHASH}" />
	<!--{/if}-->
</head>

<body id="nv_{$_G[basescript]}" class="pg_{CURMODULE}{if $_G['basescript'] === 'portal' && CURMODULE === 'list' && !empty($cat)} {$cat['bodycss']}{/if}" onkeydown="if(event.keyCode==27) return false;">
	<div id="append_parent"></div><div id="ajaxwaitid"></div>
	<!--{if $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<!--{template common/header_diy}-->
	<!--{/if}-->
	<!--{if check_diy_perm($topic)}-->
		<!--{template common/header_diynav}-->
	<!--{/if}-->
	<!--{if CURMODULE == 'topic' && $topic && empty($topic['useheader']) && check_diy_perm($topic)}-->
		$diynav
	<!--{/if}-->
	<!--{if empty($topic) || $topic['useheader']}-->
		<!--{if $_G['setting']['mobile']['allowmobile'] && (!$_G['setting']['cacheindexlife'] && !$_G['setting']['cachethreadon'] || $_G['uid']) && ($_GET['diy'] != 'yes' || !$_GET['inajax']) && ($_G['mobile'] != '' && $_G['cookie']['mobile'] == '' && $_GET['mobile'] != 'no')}-->
			<div class="xi1 bm bm_c">
			    {lang your_mobile_browser}<a href="{$_G['siteurl']}forum.php?mobile=yes">{lang go_to_mobile}</a> <span class="xg1">|</span> <a href="$_G['setting']['mobile']['nomobileurl']">{lang to_be_continue}</a>
			</div>
		<!--{/if}-->
		<!--{if !empty($_G['setting']['shortcut']) && $_G['member'][credits] >= $_G['setting']['shortcut']}-->
			<div id="shortcut">
				<span><a href="javascript:;" id="shortcutcloseid" title="{lang close}">{lang close}</a></span>
				{lang shortcut_notice}
				<a href="javascript:;" id="shortcuttip">{lang shortcut_add}</a>

			</div>
			<script type="text/javascript">setTimeout(setShortcut, 2000);</script>
		<!--{/if}-->
		<div id="toptb" class="cl">
			<!--{hook/global_cpnav_top}-->
			<div class="wp">
				<div class="z">
					<!--{loop $_G['setting']['topnavs'][0] $nav}-->
						<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}-->$nav[code]<!--{/if}-->
					<!--{/loop}-->
					<!--{hook/global_cpnav_extra1}-->
				</div>
				<div class="y">
					<a id="switchblind" href="javascript:;" onclick="toggleBlind(this)" title="{lang switch_blind}" class="switchblind"></a>
					<!--{hook/global_cpnav_extra2}-->
					<!--{loop $_G['setting']['topnavs'][1] $nav}-->
						<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}-->$nav[code]<!--{/if}-->
					<!--{/loop}-->
					<!--{if empty($_G['disabledwidthauto']) && $_G['setting']['switchwidthauto']}-->
						<a href="javascript:;" id="switchwidth" onclick="widthauto(this)" title="{if widthauto()}{lang switch_narrow}{else}{lang switch_wide}{/if}" class="switchwidth"><!--{if widthauto()}-->{lang switch_narrow}<!--{else}-->{lang switch_wide}<!--{/if}--></a>
					<!--{/if}-->
					<!--{if $_G['uid'] && !empty($_G['style']['extstyle'])}--><a id="sslct" href="javascript:;" onmouseover="delayShow(this, function() {showMenu({'ctrlid':'sslct','pos':'34!'})});">{lang changestyle}</a><!--{/if}-->
					<!--{if check_diy_perm($topic)}-->
						$diynav
					<!--{/if}-->
				</div>
			</div>
		</div>

		<!--{if !IS_ROBOT}-->
			<!--{if $_G['uid'] && !$_G['setting']['bbclosed'] && empty($_G['member']['freeze']) && $_G['member']['groupid'] != 5}-->
			<ul id="myprompt_menu" class="p_pop" style="display: none;">
				<li><a href="home.php?mod=space&do=pm" id="pm_ntc" style="background-repeat: no-repeat; background-position: 0 50%;"><em class="prompt_news{if empty($_G[member][newpm])}_0{/if}"></em>{lang pm_center}</a></li>
				<!--{if $_G['setting']['followstatus']}-->
					<li><a href="home.php?mod=follow&do=follower"><em class="prompt_follower{if empty($_G[member][newprompt_num][follower])}_0{/if}"></em><!--{lang notice_interactive_follower}-->{if $_G[member][newprompt_num][follower]}($_G[member][newprompt_num][follower]){/if}</a></li>
					<!--{if $_G[member][newprompt] && $_G[member][newprompt_num][follow]}-->
						<li><a href="home.php?mod=follow"><em class="prompt_concern"></em><!--{lang notice_interactive_follow}-->($_G[member][newprompt_num][follow])</a></li>
					<!--{/if}-->
				<!--{/if}-->
				<!--{if $_G[member][newprompt]}-->
					<!--{loop $_G['member']['category_num'] $key $val}-->
						<li><a href="home.php?mod=space&do=notice&view=$key"><em class="notice_$key"></em><!--{echo lang('template', 'notice_'.$key)}-->(<span class="rq">$val</span>)</a></li>
					<!--{/loop}-->
				<!--{/if}-->
				<!--{if empty($_G['cookie']['ignore_notice'])}-->
					<li class="ignore_noticeli"><a href="javascript:;" onclick="setcookie('ignore_notice', 1);hideMenu('myprompt_menu')" title="{lang temporarily_to_remind}"><em class="ignore_notice"></em></a></li>
				<!--{/if}-->
			</ul>
			<!--{/if}-->
			<!--{if $_G['uid'] && !empty($_G['style']['extstyle'])}-->
				<div id="sslct_menu" class="cl p_pop" style="display: none;">
					<!--{if !$_G[style][defaultextstyle]}--><span class="sslct_btn" onclick="extstyle('')" title="{lang default}"><i></i></span><!--{/if}-->
					<!--{loop $_G['style']['extstyle'] $extstyle}-->
						<span class="sslct_btn" onclick="extstyle('$extstyle[0]')" title="$extstyle[1]"><i style='background:$extstyle[2]'></i></span>
					<!--{/loop}-->
				</div>
			<!--{/if}-->
			<!--{if $_G['uid']}-->
				<ul id="myitem_menu" class="p_pop" style="display: none;">
					<!--{if $_G['setting']['forumstatus']}--><li><a href="home.php?mod=space&do=thread&view=me">{lang mypost}</a></li><!--{/if}-->
					<!--{if $_G['setting']['favoritestatus']}--><li><a href="home.php?mod=space&do=favorite&view=me">{lang favorite}</a></li><!--{/if}-->
					<!--{if $_G['setting']['friendstatus']}--><li><a href="home.php?mod=space&do=friend">{lang friends}</a></li><!--{/if}-->
					<!--{hook/global_myitem_extra}-->
				</ul>
			<!--{/if}-->
			<!--{subtemplate common/header_qmenu}-->
		<!--{/if}-->

		<!--{ad/headerbanner/wp a_h}-->
		<div id="hd">
			<div class="wp">
				<div class="hdc cl">
					<!--{eval $mnid = getcurrentnav();}-->
					<h2><!--{if !isset($_G['setting']['navlogos'][$mnid])}--><a href="{if $_G['setting']['domain']['app']['default']}{$_G['scheme']}://{$_G['setting']['domain']['app']['default']}/{else}./{/if}" title="$_G['setting']['bbname']">{$_G['style']['boardlogo']}</a><!--{else}-->$_G['setting']['navlogos'][$mnid]<!--{/if}--></h2>
					<!--{template common/header_userstatus}-->
				</div>

				<div id="nv">
					<a href="javascript:;" id="qmenu" onmouseover="delayShow(this, function () {showMenu({'ctrlid':'qmenu','pos':'34!','ctrlclass':'a','duration':2});showForummenu($_G[fid]);})">{lang my_nav}</a>
					<ul>
						<!--{loop $_G['setting']['navs'] $nav}-->
							<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}--><li {if $mnid == $nav[navid] || substr($_SERVER['REQUEST_URI'], 1) == str_replace('./', '', $nav[filename])}class="a" {/if}$nav[nav]></li><!--{/if}-->
						<!--{/loop}-->
					</ul>
					<!--{hook/global_nav_extra}-->
				</div>
				<!--{if !empty($_G['setting']['plugins']['jsmenu'])}-->
					<ul class="p_pop h_pop" id="plugin_menu" style="display: none">
					<!--{loop $_G['setting']['plugins']['jsmenu'] $module}-->
						 <!--{if in_array($module['adminid'], array(0, -1)) || ($module['adminid'] && $_G['adminid'] > 0 && $module['adminid'] >= $_G['adminid'])}-->
						 <li>$module[url]</li>
						 <!--{/if}-->
					<!--{/loop}-->
					</ul>
				<!--{/if}-->
				$_G[setting][menunavs]
				<div id="mu" class="cl">
				<!--{if $_G['setting']['subnavs']}-->
					<!--{loop $_G[setting][subnavs] $navid $subnav}-->
						<!--{if $_G['setting']['navsubhover'] || $mnid == $navid}-->
						<ul class="cl {if $mnid == $navid}current{/if}" id="snav_$navid"{if $mnid != $navid} style="display:none"{/if}>
						$subnav
						</ul>
						<!--{/if}-->
					<!--{/loop}-->
				<!--{/if}-->
				</div>
				<!--{ad/subnavbanner/a_mu}-->
				<!--{subtemplate common/pubsearchform}-->
			</div>
		</div>

		<!--{hook/global_header}-->
	<!--{/if}-->

	<div id="wp" class="wp">

qidao123.com ToB IT社区-企服评测·应用市场»论坛 › 区块链 › 区块链 › 【Solidity】合约交互
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【Solidity】合约交互

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发表于 2025-10-12 18:00:42 | 显示全部楼层 |阅读模式

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Delegate Call

在当前合约通过 delegatecall 可以借用其他合约的方法,以更新当前合约的状态变量:
  1. contract Demo {
  2.     uint public num;
  3.     uint public value;
  4.     address public sender;
  5.     function setVars(uint _num) public payable {
  6.         num += _num;
  7.         value += msg.value;
  8.         sender = msg.sender;
  9.     }
  10. }
  11. contract Proxy {
  12.     uint public num;
  13.     uint public value;
  14.     address public sender;
  15.     function setVars(address _contract, uint _num) public payable {
  16.         (bool success1, ) = _contract.delegatecall(
  17.             abi.encodeWithSignature("setVars(uint256)", _num)
  18.         );
  19.         require(success1, "Error delegatecall");
  20.     }
  21. }
复制代码

  • 摆设 Demo、Proxy 合约
  • 传入 Demo 合约的所在、数字(这里为 10),设置以太币数量(这里设置为 100),调用 Proxy 合约的 setVars 方法
  • 检察 Proxy 合约,可以看到 num 值加了 10、sender 值为编辑器所在、value 值加了 100
  • 检察 Demo 合约,可以看到 num、sender、value 值均未改变
留意:调用合约和实现合约的存储布局必须同等,否则大概会导致数据杂乱。
我们更换 Demo 合约 num 和 value 的位置,再重复上述步调,可以看到 Proxy 合约变成 num 值加了 100、value 值加了 10。这是由于,更换后的 Demo 合约 num 在第 2 个存储槽,value 在第 1 个存储槽,而 Proxy 合约的 num 仍在第 1 个存储槽,value 仍在第 2 个存储槽。

Multi Call

Multi Call 表现在单个买卖业务中调用多个合约函数。
Multi Call 合约通过循环调用多个目标合约的函数,并将结果聚合返回。每个函数调用利用 staticcall,这是一种低级调用方式,不会改变区块链状态。
  1. contract TestMultiCall {
  2.     function func1() external view returns (uint, uint) {
  3.         return (1, block.timestamp);
  4.     }
  5.     function func2() external view returns (uint, uint) {
  6.         return (2, block.timestamp);
  7.     }
  8.     // 获取 func1 的函数调用数据
  9.     function getFunc1Data() external pure returns (bytes memory) {
  10.         return abi.encodeWithSelector(this.func1.selector);
  11.     }
  12.     // 获取 func2 的函数调用数据
  13.     function getFunc2Data() external pure returns (bytes memory) {
  14.         return abi.encodeWithSelector(this.func2.selector);
  15.     }
  16. }
  17. contract MultiCall {
  18.     function aggregate(
  19.         address[] calldata targets, // 要调用的目标合约地址
  20.         bytes[] calldata data // 所需的函数调用数据
  21.     ) external view returns (bytes[] memory) {
  22.         require(targets.length == data.length, "MultiCall: invalid input");
  23.         bytes[] memory results = new bytes[](targets.length);
  24.         for (uint i = 0; i < targets.length; i++) {
  25.             (bool success, bytes memory result) = targets[i].staticcall(
  26.                 data[i]
  27.             );
  28.             require(success, "MultiCall: staticcall failed");
  29.             results[i] = result;
  30.         }
  31.         return results;
  32.     }
  33. }
复制代码

  • 摆设 TestMultiCall、MultiCall 合约
  • 调用 TestMultiCall 的 getFunc1Data、getFunc2Data 方法,获取 func1、func2 的函数调用数据
  • 传入 ["TestMultiCall 合约所在", "TestMultiCall 合约所在"] 和 ["getFunc1Data 返回的编码数据", "getFunc2Data 返回的编码数据"],调用 MultiCall 的 aggregate 方法,获取的调用结果应该为 [bytes 格式的 func1 的返回值, bytes 格式的 func2 的返回值]
  • 观察返回结果,可以看到 func1、func2 函数返回雷同的时间戳


Multi Delegate Call

Multi Delegate Call 允许在单个买卖业务中调用多个合约函数,并在调用过程中共享调用者的上下文。
  1. contract MultiDelegateCall {
  2.     function multiDelegateCall(
  3.         bytes[] calldata data
  4.     ) external payable returns (bytes[] memory results) {
  5.         results = new bytes[](data.length);
  6.         for (uint i = 0; i < data.length; i++) {
  7.             (bool success, bytes memory result) = address(this).delegatecall(
  8.                 data[i]
  9.             );
  10.             require(success, "Delegate call failed");
  11.             results[i] = result;
  12.         }
  13.     }
  14. }
  15. contract TestMultiDelegateCall is MultiDelegateCall {
  16.     event Log(address caller, string funcName, uint value);
  17.     function func1(uint x, uint y) external {
  18.         emit Log(msg.sender, "func1", x + y);
  19.     }
  20.     function func2() external returns (uint) {
  21.         emit Log(msg.sender, "func2", 123);
  22.         return 123;
  23.     }
  24. }
  25. contract Helper {
  26.     function getFunc1Data(uint x, uint y) external pure returns (bytes memory) {
  27.         return abi.encodeWithSelector(TestMultiDelegateCall.func1.selector, x, y);
  28.     }
  29.     function getFunc2Data() external pure returns (bytes memory) {
  30.         return abi.encodeWithSelector(TestMultiDelegateCall.func2.selector);
  31.     }
  32. }
复制代码

  • 摆设 Helper、TestMultiDelegateCall 合约
  • 调用 Helper 的 getFunc1Data、getFunc2Data 方法,获取 func1、func2 函数调用数据 func1Data、func2Data
  • 传入 ["func1Data", "func2Data"],调用 TestMultiDelegateCall 继续的 multiDelegateCall 方法,获取调用结果,应该返回 [bytes 格式的 func1 的返回值, bytes 格式的 func2 的返回值]
  • 观察返回结果,可以看到 bytes 格式的 func1 的返回值 为 0x,这是由于 func1 函数没有返回值
  • 检察 TestMultiDelegateCall 的变乱日记,可以看到 func1、func2 函数的调用者是编辑器所在

在传输以太时必要留意传输的数量,以免出现不合预期的情况:
  1. contract MultiDelegateCall {
  2.     function multiDelegateCall(
  3.         bytes[] calldata data
  4.     ) external payable returns (bytes[] memory results) {
  5.         results = new bytes[](data.length);
  6.         for (uint i = 0; i < data.length; i++) {
  7.             (bool success, bytes memory result) = address(this).delegatecall(
  8.                 data[i]
  9.             );
  10.             require(success, "Delegate call failed");
  11.             results[i] = result;
  12.         }
  13.     }
  14. }
  15. contract TestMultiDelegateCall is MultiDelegateCall {
  16.     mapping(address => uint) public balanceOf;
  17.     function mint() external payable {
  18.         balanceOf[msg.sender] += msg.value;
  19.     }
  20. }
  21. contract Helper {
  22.     function getMintData() external pure returns (bytes memory) {
  23.         return abi.encodeWithSelector(TestMultiDelegateCall.mint.selector);
  24.     }
  25. }
复制代码

  • 摆设 Helper、TestMultiDelegateCall 合约
  • 调用 Helper 的 getMintData 方法,获取 mint 的函数调用数据 mintData
  • 调用 TestMultiDelegateCall 继续的 multiDelegateCall 方法,传入 ["mintData", "mintData", "mintData"],设置以太数为 1 wei
  • 用编辑器所在检察 TestMultiDelegateCall 合约的 balanceOf,可以看到传输的以太数为 3 wei


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