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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="API documentation for the Rust `find_solution` fn in crate `miner`."><meta name="keywords" content="rust, rustlang, rust-lang, find_solution"><title>miner::find_solution - Rust</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="../dark.css"><link rel="stylesheet" type="text/css" href="../light.css" id="themeStyle"><script src="../storage.js"></script></head><body class="rustdoc fn"><!--[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><div class="sidebar-elems"><p class='location'><a href='index.html'>miner</a></p><script>window.sidebarCurrent = {name: 'find_solution', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../theme.js"></script><nav class="sub"><form class="search-form js-only"><div class="search-container"><input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><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"><h1 class='fqn'><span class='out-of-band'><span id='render-detail'><a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class='inner'>−</span>]</a></span><a class='srclink' href='../src/miner/cpu_miner.rs.html#93-135' title='goto source code'>[src]</a></span><span class='in-band'>Function <a href='index.html'>miner</a>::<wbr><a class="fn" href=''>find_solution</a></span></h1><pre class='rust fn'>pub fn find_solution<T>(<br> block: &<a class="struct" href="../miner/struct.BlockTemplate.html" title="struct miner::BlockTemplate">BlockTemplate</a>, <br> coinbase_transaction_builder: T, <br> max_extranonce: U256<br>) -> <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a><Solution> <span class="where fmt-newline">where<br> T: CoinbaseTransactionBuilder, </span></pre><div class='docblock'><p>Simple bitcoin cpu miner.</p>
<p>First it tries to find solution by changing block header nonce.
Once all nonce values have been tried, it increases extranonce.
Once all of them have been tried (quite unlikely on cpu ;),
and solution still hasn't been found it returns None.
It's possible to also experiment with time, but I find it pointless
to implement on CPU.</p>
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