-<!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="In-memory ephemeral database"><meta name="keywords" content="rust, rustlang, rust-lang, memory"><title>bdk::database::memory - 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="../../../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><script src="../../../crates.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../../bdk/index.html'><div class='logo-container rust-logo'><img src='../../../rust-logo.png' alt='logo'></div></a><h2 class="location">Module memory</h2><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><div id="sidebar-vars" data-name="memory" data-ty="mod" data-relpath="./"></div><script defer src="./sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><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" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../../index.html">bdk</a>::<wbr><a href="../index.html">database</a>::<wbr><a class="mod" href="#">memory</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span><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/bdk/database/memory.rs.html#12-589" title="goto source code">[src]</a></span></h1><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>In-memory ephemeral database</p>
+<!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="In-memory ephemeral database"><meta name="keywords" content="rust, rustlang, rust-lang, memory"><title>bdk::database::memory - 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="../../../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><script src="../../../crates.js"></script><noscript><link rel="stylesheet" href="../../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../../favicon.svg"><style type="text/css">#crate-search{background-image:url("../../../down-arrow.svg");}</style></head><body class="rustdoc mod"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">☰</div><a href='../../../bdk/index.html'><div class='logo-container rust-logo'><img src='../../../rust-logo.png' alt='logo'></div></a><h2 class="location">Module memory</h2><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li></ul></div><div id="sidebar-vars" data-name="memory" data-ty="mod" data-relpath="./"></div><script defer src="./sidebar-items.js"></script></div></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><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" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav><section id="main" class="content"><h1 class="fqn"><span class="in-band">Module <a href="../../index.html">bdk</a>::<wbr><a href="../index.html">database</a>::<wbr><a class="mod" href="#">memory</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span><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/bdk/database/memory.rs.html#12-592" title="goto source code">[src]</a></span></h1><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>In-memory ephemeral database</p>
<p>This module defines an in-memory database type called <a href="struct.MemoryDatabase.html" title="MemoryDatabase"><code>MemoryDatabase</code></a> that is based on a
<a href="https://doc.rust-lang.org/nightly/alloc/collections/btree/map/struct.BTreeMap.html" title="BTreeMap"><code>BTreeMap</code></a>.</p>
</div></details><h2 id="structs" class="section-header"><a href="#structs">Structs</a></h2>
<span id="587">587</span>
<span id="588">588</span>
<span id="589">589</span>
+<span id="590">590</span>
+<span id="591">591</span>
+<span id="592">592</span>
</pre><pre class="rust"><code><span class="comment">// Bitcoin Dev Kit</span>
<span class="comment">// Written in 2020 by Alekos Filini <alekos.filini@gmail.com></span>
<span class="comment">//</span>
<span class="doccomment">/// don't have `test` set.</span>
<span class="macro">macro_rules!</span> <span class="ident">populate_test_db</span> {
(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">db</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tx_meta</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">current_height</span>:<span class="ident">expr</span>$(,)<span class="question-mark">?</span>) <span class="op">=</span><span class="op">></span> {{
+ <span class="kw">use</span> <span class="ident">std::str::FromStr</span>;
<span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::database::BatchOperations</span>;
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">db</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">db</span>;
<span class="kw">let</span> <span class="ident">tx_meta</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">tx_meta</span>;
<span class="kw">let</span> <span class="ident">current_height</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">u32</span><span class="op">></span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">current_height</span>;
- <span class="kw">let</span> <span class="ident">tx</span> <span class="op">=</span> <span class="ident">Transaction</span> {
+ <span class="kw">let</span> <span class="ident">tx</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::Transaction</span> {
<span class="ident">version</span>: <span class="number">1</span>,
<span class="ident">lock_time</span>: <span class="number">0</span>,
<span class="ident">input</span>: <span class="macro">vec!</span>[],
<span class="ident">output</span>: <span class="ident">tx_meta</span>
.<span class="ident">output</span>
.<span class="ident">iter</span>()
- .<span class="ident">map</span>(<span class="op">|</span><span class="ident">out_meta</span><span class="op">|</span> <span class="ident">bitcoin::TxOut</span> {
+ .<span class="ident">map</span>(<span class="op">|</span><span class="ident">out_meta</span><span class="op">|</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::TxOut</span> {
<span class="ident">value</span>: <span class="ident">out_meta</span>.<span class="ident">value</span>,
- <span class="ident">script_pubkey</span>: <span class="ident">bitcoin::Address::from_str</span>(<span class="kw-2">&</span><span class="ident">out_meta</span>.<span class="ident">to_address</span>)
+ <span class="ident">script_pubkey</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::Address::from_str</span>(<span class="kw-2">&</span><span class="ident">out_meta</span>.<span class="ident">to_address</span>)
.<span class="ident">unwrap</span>()
.<span class="ident">script_pubkey</span>(),
})
};
<span class="kw">let</span> <span class="ident">txid</span> <span class="op">=</span> <span class="ident">tx</span>.<span class="ident">txid</span>();
- <span class="kw">let</span> <span class="ident">confirmation_time</span> <span class="op">=</span> <span class="ident">tx_meta</span>.<span class="ident">min_confirmations</span>.<span class="ident">map</span>(<span class="op">|</span><span class="ident">conf</span><span class="op">|</span> <span class="ident">ConfirmationTime</span> {
- <span class="ident">height</span>: <span class="ident">current_height</span>.<span class="ident">unwrap</span>().<span class="ident">checked_sub</span>(<span class="ident">conf</span> <span class="kw">as</span> <span class="ident">u32</span>).<span class="ident">unwrap</span>(),
- <span class="ident">timestamp</span>: <span class="number">0</span>,
- });
-
- <span class="kw">let</span> <span class="ident">tx_details</span> <span class="op">=</span> <span class="ident">TransactionDetails</span> {
+ <span class="kw">let</span> <span class="ident">confirmation_time</span> <span class="op">=</span> <span class="ident">tx_meta</span>
+ .<span class="ident">min_confirmations</span>
+ .<span class="ident">map</span>(<span class="op">|</span><span class="ident">conf</span><span class="op">|</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::ConfirmationTime</span> {
+ <span class="ident">height</span>: <span class="ident">current_height</span>.<span class="ident">unwrap</span>().<span class="ident">checked_sub</span>(<span class="ident">conf</span> <span class="kw">as</span> <span class="ident">u32</span>).<span class="ident">unwrap</span>(),
+ <span class="ident">timestamp</span>: <span class="number">0</span>,
+ });
+
+ <span class="kw">let</span> <span class="ident">tx_details</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::TransactionDetails</span> {
<span class="ident">transaction</span>: <span class="prelude-val">Some</span>(<span class="ident">tx</span>.<span class="ident">clone</span>()),
<span class="ident">txid</span>,
<span class="ident">fee</span>: <span class="prelude-val">Some</span>(<span class="number">0</span>),
<span class="ident">db</span>.<span class="ident">set_tx</span>(<span class="kw-2">&</span><span class="ident">tx_details</span>).<span class="ident">unwrap</span>();
<span class="kw">for</span> (<span class="ident">vout</span>, <span class="ident">out</span>) <span class="kw">in</span> <span class="ident">tx</span>.<span class="ident">output</span>.<span class="ident">iter</span>().<span class="ident">enumerate</span>() {
- <span class="ident">db</span>.<span class="ident">set_utxo</span>(<span class="kw-2">&</span><span class="ident">LocalUtxo</span> {
+ <span class="ident">db</span>.<span class="ident">set_utxo</span>(<span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::LocalUtxo</span> {
<span class="ident">txout</span>: <span class="ident">out</span>.<span class="ident">clone</span>(),
- <span class="ident">outpoint</span>: <span class="ident">OutPoint</span> {
+ <span class="ident">outpoint</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::OutPoint</span> {
<span class="ident">txid</span>,
<span class="ident">vout</span>: <span class="ident">vout</span> <span class="kw">as</span> <span class="ident">u32</span>,
},
- <span class="ident">keychain</span>: <span class="ident">KeychainKind::External</span>,
+ <span class="ident">keychain</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::KeychainKind::External</span>,
})
.<span class="ident">unwrap</span>();
}
<span class="attribute">#[<span class="ident">macro_export</span>]</span>
<span class="macro">macro_rules!</span> <span class="ident">testutils</span> {
( @<span class="ident">external</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>:<span class="ident">expr</span> ) <span class="op">=</span><span class="op">></span> ({
- <span class="kw">use</span> <span class="ident">bitcoin::secp256k1::Secp256k1</span>;
- <span class="kw">use</span> <span class="ident">miniscript::descriptor</span>::{<span class="ident">Descriptor</span>, <span class="ident">DescriptorPublicKey</span>, <span class="ident">DescriptorTrait</span>};
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::secp256k1::Secp256k1</span>;
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::miniscript::descriptor</span>::{<span class="ident">Descriptor</span>, <span class="ident">DescriptorPublicKey</span>, <span class="ident">DescriptorTrait</span>};
<span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::testutils::TranslateDescriptor</span>;
<span class="ident">parsed</span>.<span class="ident">derive_translated</span>(<span class="kw-2">&</span><span class="ident">secp</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>).<span class="ident">address</span>(<span class="ident">bitcoin::Network::Regtest</span>).<span class="ident">expect</span>(<span class="string">"No address form"</span>)
});
( @<span class="ident">internal</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>:<span class="ident">expr</span> ) <span class="op">=</span><span class="op">></span> ({
- <span class="kw">use</span> <span class="ident">bitcoin::secp256k1::Secp256k1</span>;
- <span class="kw">use</span> <span class="ident">miniscript::descriptor</span>::{<span class="ident">Descriptor</span>, <span class="ident">DescriptorPublicKey</span>, <span class="ident">DescriptorTrait</span>};
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::secp256k1::Secp256k1</span>;
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::miniscript::descriptor</span>::{<span class="ident">Descriptor</span>, <span class="ident">DescriptorPublicKey</span>, <span class="ident">DescriptorTrait</span>};
<span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::testutils::TranslateDescriptor</span>;
<span class="kw">let</span> <span class="ident">secp</span> <span class="op">=</span> <span class="ident">Secp256k1::new</span>();
<span class="kw">let</span> <span class="ident">parsed</span> <span class="op">=</span> <span class="ident">Descriptor</span>::<span class="op"><</span><span class="ident">DescriptorPublicKey</span><span class="op">></span><span class="ident">::parse_descriptor</span>(<span class="kw-2">&</span><span class="ident">secp</span>, <span class="kw-2">&</span><span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>.<span class="number">1</span>.<span class="ident">expect</span>(<span class="string">"Missing internal descriptor"</span>)).<span class="ident">expect</span>(<span class="string">"Failed to parse descriptor in `testutils!(@internal)`"</span>).<span class="number">0</span>;
- <span class="ident">parsed</span>.<span class="ident">derive_translated</span>(<span class="kw-2">&</span><span class="ident">secp</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>).<span class="ident">address</span>(<span class="ident">bitcoin::Network::Regtest</span>).<span class="ident">expect</span>(<span class="string">"No address form"</span>)
+ <span class="ident">parsed</span>.<span class="ident">derive_translated</span>(<span class="kw-2">&</span><span class="ident">secp</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>).<span class="ident">address</span>(<span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::Network::Regtest</span>).<span class="ident">expect</span>(<span class="string">"No address form"</span>)
});
( @<span class="ident">e</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>:<span class="ident">expr</span> ) <span class="op">=</span><span class="op">></span> ({ <span class="macro">testutils!</span>(@<span class="ident">external</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>) });
( @<span class="ident">i</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>:<span class="ident">expr</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>:<span class="ident">expr</span> ) <span class="op">=</span><span class="op">></span> ({ <span class="macro">testutils!</span>(@<span class="ident">internal</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">descriptors</span>, <span class="macro-nonterminal">$</span><span class="macro-nonterminal">child</span>) });
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">seed</span> <span class="op">=</span> [<span class="number">0u8</span>; <span class="number">32</span>];
<span class="ident">rand::thread_rng</span>().<span class="ident">fill</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">seed</span>[..]);
- <span class="kw">let</span> <span class="ident">key</span> <span class="op">=</span> <span class="ident">bitcoin::util::bip32::ExtendedPrivKey::new_master</span>(
- <span class="ident">bitcoin::Network::Testnet</span>,
+ <span class="kw">let</span> <span class="ident">key</span> <span class="op">=</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::util::bip32::ExtendedPrivKey::new_master</span>(
+ <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::Network::Testnet</span>,
<span class="kw-2">&</span><span class="ident">seed</span>,
);
( @<span class="ident">generate_wif</span> ) <span class="op">=</span><span class="op">></span> ({
<span class="kw">use</span> <span class="ident">rand::Rng</span>;
- <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">key</span> <span class="op">=</span> [<span class="number">0u8</span>; <span class="ident">bitcoin::secp256k1::constants::SECRET_KEY_SIZE</span>];
+ <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">key</span> <span class="op">=</span> [<span class="number">0u8</span>; <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::secp256k1::constants::SECRET_KEY_SIZE</span>];
<span class="ident">rand::thread_rng</span>().<span class="ident">fill</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">key</span>[..]);
- (<span class="ident">bitcoin::PrivateKey</span> {
+ (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::PrivateKey</span> {
<span class="ident">compressed</span>: <span class="bool-val">true</span>,
- <span class="ident">network</span>: <span class="ident">bitcoin::Network::Testnet</span>,
- <span class="ident">key</span>: <span class="ident">bitcoin::secp256k1::SecretKey::from_slice</span>(<span class="kw-2">&</span><span class="ident">key</span>).<span class="ident">unwrap</span>(),
+ <span class="ident">network</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::Network::Testnet</span>,
+ <span class="ident">key</span>: <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::bitcoin::secp256k1::SecretKey::from_slice</span>(<span class="kw-2">&</span><span class="ident">key</span>).<span class="ident">unwrap</span>(),
}.<span class="ident">to_string</span>(), <span class="prelude-val">None</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>, <span class="prelude-val">None</span>::<span class="op"><</span><span class="ident">String</span><span class="op">></span>)
});
( @<span class="ident">descriptors</span> ( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">external_descriptor</span>:<span class="ident">expr</span> ) $( ( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">internal_descriptor</span>:<span class="ident">expr</span> ) )<span class="question-mark">?</span> $( ( @<span class="ident">keys</span> $( <span class="macro-nonterminal">$</span><span class="macro-nonterminal">keys</span>:<span class="ident">tt</span> )<span class="op">*</span> ) )<span class="op">*</span> ) <span class="op">=</span><span class="op">></span> ({
<span class="kw">use</span> <span class="ident">std::str::FromStr</span>;
<span class="kw">use</span> <span class="ident">std::collections::HashMap</span>;
- <span class="kw">use</span> <span class="ident">miniscript::descriptor::Descriptor</span>;
- <span class="kw">use</span> <span class="ident">miniscript::TranslatePk</span>;
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::miniscript::descriptor::Descriptor</span>;
+ <span class="kw">use</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">crate::miniscript::TranslatePk</span>;
<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">unused_assignments</span>, <span class="ident">unused_mut</span>)]</span>
<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">keys</span>: <span class="ident">HashMap</span><span class="op"><</span><span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>, (<span class="ident">String</span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>, <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">String</span><span class="op">></span>)<span class="op">></span> <span class="op">=</span> <span class="ident">HashMap::new</span>();