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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/pow.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>pow.rs - source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
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<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../m_captcha/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><button type="button" class="help-button">?</button>
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<a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><div class="example-wrap"><pre class="rust ">
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<span class="comment">/*
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* mCaptcha - A proof of work based DoS protection system
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* Copyright © 2021 Aravinth Manivannan <realravinth@batsense.net>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/</span>
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<span class="doccomment">//! PoW datatypes used in client-server interaction</span>
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<span class="kw">use</span> <span class="ident">pow_sha256</span>::<span class="ident">PoW</span>;
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<span class="kw">use</span> <span class="ident">serde</span>::<span class="ident">Serialize</span>;
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<span class="kw">pub</span> <span class="kw">use</span> <span class="ident">pow_sha256</span>::<span class="ident">ConfigBuilder</span>;
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<span class="doccomment">/// PoW requirement datatype that is be sent to clients for generating PoW</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Serialize</span>, <span class="ident">Debug</span>)]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PoWConfig</span> {
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<span class="kw">pub</span> <span class="ident">string</span>: <span class="ident">String</span>,
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<span class="kw">pub</span> <span class="ident">difficulty_factor</span>: <span class="ident">u32</span>,
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}
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<span class="kw">impl</span> <span class="ident">PoWConfig</span> {
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<span class="doccomment">/// create new instance of [PoWConfig]</span>
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">m</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
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<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">utils</span>::<span class="ident">get_random</span>;
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<span class="ident">PoWConfig</span> {
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<span class="ident">string</span>: <span class="ident">get_random</span>(<span class="number">32</span>),
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<span class="ident">difficulty_factor</span>: <span class="ident">m</span>,
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}
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}
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}
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<span class="doccomment">/// PoW datatype that clients send to server</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Serialize</span>, <span class="ident">Debug</span>)]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Work</span> {
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<span class="kw">pub</span> <span class="ident">string</span>: <span class="ident">String</span>,
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<span class="kw">pub</span> <span class="ident">result</span>: <span class="ident">String</span>,
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<span class="kw">pub</span> <span class="ident">nonce</span>: <span class="ident">u64</span>,
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}
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<span class="kw">impl</span> <span class="ident">From</span><span class="op"><</span><span class="ident">Work</span><span class="op">></span> <span class="kw">for</span> <span class="ident">PoW</span><span class="op"><</span><span class="ident">String</span><span class="op">></span> {
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<span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">w</span>: <span class="ident">Work</span>) <span class="op">-</span><span class="op">></span> <span class="self">Self</span> {
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<span class="kw">use</span> <span class="ident">pow_sha256</span>::<span class="ident">PoWBuilder</span>;
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<span class="ident">PoWBuilder</span>::<span class="ident">default</span>()
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.<span class="ident">result</span>(<span class="ident">w</span>.<span class="ident">result</span>)
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.<span class="ident">nonce</span>(<span class="ident">w</span>.<span class="ident">nonce</span>)
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.<span class="ident">build</span>()
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.<span class="ident">unwrap</span>()
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}
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}
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</pre></div>
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