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</pre><div class="example-wrap"><pre class="rust ">
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<span class="doccomment">//! MCaptch's SHA256 based Proof of Work library</span>
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<span class="doccomment">//!</span>
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<span class="doccomment">//! # Example:</span>
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<span class="doccomment">//! ```rust</span>
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<span class="doccomment">//! use pow_sha256::{ConfigBuilder, PoW};</span>
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<span class="doccomment">//!</span>
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<span class="doccomment">//! fn main() {</span>
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<span class="doccomment">//! let config = ConfigBuilder::default()</span>
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<span class="doccomment">//! .salt("myrandomsaltisnotlongenoug".into())</span>
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<span class="doccomment">//! .build()</span>
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<span class="doccomment">//! .unwrap();</span>
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<span class="doccomment">//!</span>
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<span class="doccomment">//! let phrase = "ironmansucks";</span>
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<span class="doccomment">//!</span>
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<span class="doccomment">//! const DIFFICULTY: u32 = 1000;</span>
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<span class="doccomment">//!</span>
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<span class="doccomment">//! let work = config.prove_work(&phrase, DIFFICULTY).unwrap();</span>
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<span class="doccomment">//! assert!(config.is_valid_proof(&work, &phrase));</span>
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<span class="doccomment">//! assert!(config.is_sufficient_difficulty(&work, DIFFICULTY));</span>
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<span class="doccomment">//! } </span>
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<span class="doccomment">//! ```</span>
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<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">marker</span>::<span class="ident">PhantomData</span>;
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<span class="kw">use</span> <span class="ident">derive_builder</span>::<span class="ident">Builder</span>;
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<span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>};
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<span class="kw">use</span> <span class="ident">sha2</span>::{<span class="ident">Digest</span>, <span class="ident">Sha256</span>};
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<span class="doccomment">/// Proof of Work over concrete type T. T can be any type that implements serde::Serialize.</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Builder</span>, <span class="ident">Deserialize</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span> {
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<span class="kw">pub</span> <span class="ident">nonce</span>: <span class="ident">u64</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="attribute">#[<span class="ident">builder</span>(<span class="ident">default</span> <span class="op">=</span> <span class="string">"PhantomData"</span>, <span class="ident">setter</span>(<span class="ident">skip</span>))]</span>
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<span class="ident">_spook</span>: <span class="ident">PhantomData</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>,
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}
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<span class="doccomment">/// Configuration for generting proof of work</span>
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<span class="doccomment">/// Please choose a long, unique value for salt</span>
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<span class="doccomment">/// Resistance to dictionary/rainbow attacks depend on uniqueness</span>
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<span class="doccomment">/// of the salt</span>
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<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Builder</span>, <span class="ident">PartialEq</span>, <span class="ident">Clone</span>, <span class="ident">Debug</span>)]</span>
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<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Config</span> {
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<span class="kw">pub</span> <span class="ident">salt</span>: <span class="ident">String</span>,
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}
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<span class="kw">impl</span> <span class="ident">Config</span> {
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<span class="doccomment">/// Create Proof of Work over item of type T.</span>
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<span class="doccomment">///</span>
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<span class="doccomment">/// Make sure difficulty is not too high. A 64 bit difficulty,</span>
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<span class="doccomment">/// for example, takes a long time on a general purpose processor.</span>
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<span class="doccomment">/// Returns bincode::Error if serialization fails.</span>
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<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">prove_work</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">T</span>, <span class="ident">difficulty</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bincode</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span><span class="op">></span>
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<span class="kw">where</span>
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<span class="ident">T</span>: <span class="ident">Serialize</span>,
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{
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<span class="ident">bincode</span>::<span class="ident">serialize</span>(<span class="ident">t</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="self">self</span>.<span class="ident">prove_work_serialized</span>(<span class="kw-2">&</span><span class="ident">v</span>, <span class="ident">difficulty</span>))
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}
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||
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<span class="doccomment">/// Create Proof of Work on an already serialized item of type T.</span>
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||
<span class="doccomment">/// The input is assumed to be serialized using network byte order.</span>
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<span class="doccomment">///</span>
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||
<span class="doccomment">/// Make sure difficulty is not too high. A 64 bit difficulty,</span>
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||
<span class="doccomment">/// for example, takes a long time on a general purpose processor.</span>
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||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">prove_work_serialized</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">prefix</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>], <span class="ident">difficulty</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>
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||
<span class="kw">where</span>
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||
<span class="ident">T</span>: <span class="ident">Serialize</span>,
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{
|
||
<span class="kw">let</span> <span class="ident">prefix_sha</span> <span class="op">=</span> <span class="ident">Sha256</span>::<span class="ident">new</span>().<span class="ident">chain</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">salt</span>).<span class="ident">chain</span>(<span class="ident">prefix</span>);
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">n</span> <span class="op">=</span> <span class="number">0</span>;
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<span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="number">0</span>;
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<span class="kw">let</span> <span class="ident">difficulty</span> <span class="op">=</span> <span class="ident">get_difficulty</span>(<span class="ident">difficulty</span>);
|
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<span class="kw">while</span> <span class="ident">result</span> <span class="op"><</span> <span class="ident">difficulty</span> {
|
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<span class="ident">n</span> <span class="op">+</span><span class="op">=</span> <span class="number">1</span>;
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<span class="ident">result</span> <span class="op">=</span> <span class="ident">score</span>(<span class="ident">prefix_sha</span>.<span class="ident">clone</span>(), <span class="ident">n</span>);
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}
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<span class="ident">PoW</span> {
|
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<span class="ident">nonce</span>: <span class="ident">n</span>,
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||
<span class="ident">result</span>: <span class="ident">result</span>.<span class="ident">to_string</span>(),
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<span class="ident">_spook</span>: <span class="ident">PhantomData</span>,
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}
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}
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||
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<span class="doccomment">/// Calculate the PoW score with the provided input T.</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">calculate</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pow</span>: <span class="kw-2">&</span><span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bincode</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">u128</span><span class="op">></span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">Serialize</span>,
|
||
{
|
||
<span class="ident">bincode</span>::<span class="ident">serialize</span>(<span class="ident">t</span>).<span class="ident">map</span>(<span class="op">|</span><span class="ident">v</span><span class="op">|</span> <span class="self">self</span>.<span class="ident">calculate_serialized</span>(<span class="ident">pow</span>, <span class="kw-2">&</span><span class="ident">v</span>))
|
||
}
|
||
|
||
<span class="doccomment">/// Calculate the PoW score of an already serialized T and self.</span>
|
||
<span class="doccomment">/// The input is assumed to be serialized using network byte order.</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">calculate_serialized</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pow</span>: <span class="kw-2">&</span><span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">target</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-</span><span class="op">></span> <span class="ident">u128</span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">Serialize</span>,
|
||
{
|
||
<span class="ident">score</span>(<span class="ident">Sha256</span>::<span class="ident">new</span>().<span class="ident">chain</span>(<span class="kw-2">&</span><span class="self">self</span>.<span class="ident">salt</span>).<span class="ident">chain</span>(<span class="ident">target</span>), <span class="ident">pow</span>.<span class="ident">nonce</span>)
|
||
}
|
||
|
||
<span class="doccomment">/// Verifies that the PoW is indeed generated out of the phrase provided.</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_valid_proof</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pow</span>: <span class="kw-2">&</span><span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">t</span>: <span class="kw-2">&</span><span class="ident">T</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">Serialize</span>,
|
||
{
|
||
<span class="kw">match</span> <span class="self">self</span>.<span class="ident">calculate</span>(<span class="ident">pow</span>, <span class="ident">t</span>) {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">res</span>) <span class="op">=</span><span class="op">></span> {
|
||
<span class="kw">return</span> <span class="kw">if</span> <span class="ident">pow</span>.<span class="ident">result</span> <span class="op">=</span><span class="op">=</span> <span class="ident">res</span>.<span class="ident">to_string</span>() {
|
||
<span class="bool-val">true</span>
|
||
} <span class="kw">else</span> {
|
||
<span class="bool-val">false</span>
|
||
}
|
||
}
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="bool-val">false</span>,
|
||
}
|
||
}
|
||
|
||
<span class="doccomment">/// Checks if the PoW result is of sufficient difficulty</span>
|
||
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_sufficient_difficulty</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pow</span>: <span class="kw-2">&</span><span class="ident">PoW</span><span class="op"><</span><span class="ident">T</span><span class="op">></span>, <span class="ident">target_diff</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span>
|
||
<span class="kw">where</span>
|
||
<span class="ident">T</span>: <span class="ident">Serialize</span>,
|
||
{
|
||
<span class="kw">match</span> <span class="ident">pow</span>.<span class="ident">result</span>.<span class="ident">parse</span>::<span class="op"><</span><span class="ident">u128</span><span class="op">></span>() {
|
||
<span class="prelude-val">Ok</span>(<span class="ident">res</span>) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="ident">res</span> <span class="op">></span><span class="op">=</span> <span class="ident">get_difficulty</span>(<span class="ident">target_diff</span>),
|
||
<span class="prelude-val">Err</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">></span> <span class="kw">return</span> <span class="bool-val">false</span>,
|
||
}
|
||
}
|
||
}
|
||
|
||
<span class="kw">fn</span> <span class="ident">score</span>(<span class="ident">prefix_sha</span>: <span class="ident">Sha256</span>, <span class="ident">nonce</span>: <span class="ident">u64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">u128</span> {
|
||
<span class="ident">first_bytes_as_u128</span>(
|
||
<span class="ident">prefix_sha</span>
|
||
.<span class="ident">chain</span>(<span class="kw-2">&</span><span class="ident">nonce</span>.<span class="ident">to_be_bytes</span>()) <span class="comment">// to_be_bytes() converts to network endian</span>
|
||
.<span class="ident">finalize</span>()
|
||
.<span class="ident">as_slice</span>(),
|
||
)
|
||
}
|
||
|
||
<span class="doccomment">/// # Panics</span>
|
||
<span class="doccomment">///</span>
|
||
<span class="doccomment">/// panics if inp.len() < 16</span>
|
||
<span class="kw">fn</span> <span class="ident">first_bytes_as_u128</span>(<span class="ident">inp</span>: <span class="kw-2">&</span>[<span class="ident">u8</span>]) <span class="op">-</span><span class="op">></span> <span class="ident">u128</span> {
|
||
<span class="kw">use</span> <span class="ident">bincode</span>::<span class="ident">config</span>::<span class="kw-2">*</span>;
|
||
<span class="ident">DefaultOptions</span>::<span class="ident">new</span>()
|
||
.<span class="ident">with_fixint_encoding</span>()
|
||
.<span class="ident">allow_trailing_bytes</span>()
|
||
.<span class="ident">with_no_limit</span>()
|
||
.<span class="ident">with_big_endian</span>()
|
||
.<span class="ident">deserialize</span>(<span class="kw-2">&</span><span class="ident">inp</span>)
|
||
.<span class="ident">unwrap</span>()
|
||
}
|
||
|
||
<span class="comment">// utility function to get u128 difficulty factor from u32</span>
|
||
<span class="comment">// javacript isn't capable of represnting u128 so</span>
|
||
<span class="kw">fn</span> <span class="ident">get_difficulty</span>(<span class="ident">difficulty_factor</span>: <span class="ident">u32</span>) <span class="op">-</span><span class="op">></span> <span class="ident">u128</span> {
|
||
<span class="ident">u128</span>::<span class="ident">max_value</span>() <span class="op">-</span> <span class="ident">u128</span>::<span class="ident">max_value</span>() <span class="op">/</span> <span class="ident">difficulty_factor</span> <span class="kw">as</span> <span class="ident">u128</span>
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
|
||
<span class="kw">mod</span> <span class="ident">test</span> {
|
||
<span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;
|
||
|
||
<span class="kw">const</span> <span class="ident">DIFFICULTY</span>: <span class="ident">u32</span> <span class="op">=</span> <span class="number">1000</span>;
|
||
|
||
<span class="kw">fn</span> <span class="ident">get_config</span>() <span class="op">-</span><span class="op">></span> <span class="ident">Config</span> {
|
||
<span class="ident">ConfigBuilder</span>::<span class="ident">default</span>()
|
||
.<span class="ident">salt</span>(
|
||
<span class="string">"79ziepia7vhjgviiwjhnend3ofjqocsi2winc4ptqhmkvcajihywxcizewvckg9h6gs4j83v9"</span>.<span class="ident">into</span>(),
|
||
)
|
||
.<span class="ident">build</span>()
|
||
.<span class="ident">unwrap</span>()
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">base_functionality</span>() {
|
||
<span class="comment">// Let's prove we did work targeting a phrase.</span>
|
||
<span class="kw">let</span> <span class="ident">phrase</span> <span class="op">=</span> <span class="string">b"Ex nihilo nihil fit."</span>.<span class="ident">to_vec</span>();
|
||
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">get_config</span>();
|
||
<span class="kw">let</span> <span class="ident">pw</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">phrase</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">calculate</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="kw-2">&</span><span class="ident">phrase</span>).<span class="ident">unwrap</span>() <span class="op">></span><span class="op">=</span> <span class="ident">get_difficulty</span>(<span class="ident">DIFFICULTY</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="kw-2">&</span><span class="ident">phrase</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_sufficient_difficulty</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="ident">DIFFICULTY</span>));
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">double_pow</span>() {
|
||
<span class="kw">let</span> <span class="ident">phrase</span> <span class="op">=</span> <span class="string">"Ex nihilo nihil fit."</span>.<span class="ident">to_owned</span>();
|
||
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">get_config</span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">pw</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">phrase</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
<span class="kw">let</span> <span class="ident">pwpw</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">calculate</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="kw-2">&</span><span class="ident">phrase</span>).<span class="ident">unwrap</span>() <span class="op">></span><span class="op">=</span> <span class="ident">get_difficulty</span>(<span class="ident">DIFFICULTY</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="kw-2">&</span><span class="ident">phrase</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_sufficient_difficulty</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="ident">DIFFICULTY</span>));
|
||
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">calculate</span>(<span class="kw-2">&</span><span class="ident">pwpw</span>, <span class="kw-2">&</span><span class="ident">pw</span>).<span class="ident">unwrap</span>() <span class="op">></span><span class="op">=</span> <span class="ident">get_difficulty</span>(<span class="ident">DIFFICULTY</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">pwpw</span>, <span class="kw-2">&</span><span class="ident">pw</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_sufficient_difficulty</span>(<span class="kw-2">&</span><span class="ident">pwpw</span>, <span class="ident">DIFFICULTY</span>));
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">is_not_valid_proof</span>() {
|
||
<span class="kw">let</span> <span class="ident">phrase</span> <span class="op">=</span> <span class="string">"Ex nihilo nihil fit."</span>.<span class="ident">to_owned</span>();
|
||
<span class="kw">let</span> <span class="ident">phrase2</span> <span class="op">=</span> <span class="string">"Omne quod movetur ab alio movetur."</span>.<span class="ident">to_owned</span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">get_config</span>();
|
||
<span class="kw">let</span> <span class="ident">pw</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">phrase</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">pw2</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">phrase2</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">pw</span>, <span class="kw-2">&</span><span class="ident">phrase2</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="op">!</span><span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">pw2</span>, <span class="kw-2">&</span><span class="ident">phrase</span>));
|
||
}
|
||
|
||
<span class="attribute">#[<span class="ident">test</span>]</span>
|
||
<span class="kw">fn</span> <span class="ident">serialization_test</span>() {
|
||
<span class="kw">let</span> <span class="ident">target</span>: <span class="ident">u8</span> <span class="op">=</span> <span class="number">1</span>;
|
||
<span class="kw">let</span> <span class="ident">config</span> <span class="op">=</span> <span class="ident">get_config</span>();
|
||
<span class="kw">let</span> <span class="ident">pw</span> <span class="op">=</span> <span class="ident">config</span>.<span class="ident">prove_work</span>(<span class="kw-2">&</span><span class="ident">target</span>, <span class="ident">DIFFICULTY</span>).<span class="ident">unwrap</span>();
|
||
|
||
<span class="kw">let</span> <span class="ident">message</span>: (<span class="ident">u8</span>, <span class="ident">PoW</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>) <span class="op">=</span> (<span class="ident">target</span>, <span class="ident">pw</span>);
|
||
<span class="kw">let</span> <span class="ident">message_ser</span> <span class="op">=</span> <span class="ident">bincode</span>::<span class="ident">serialize</span>(<span class="kw-2">&</span><span class="ident">message</span>).<span class="ident">unwrap</span>();
|
||
<span class="kw">let</span> <span class="ident">recieved_message</span>: (<span class="ident">u8</span>, <span class="ident">PoW</span><span class="op"><</span><span class="ident">u8</span><span class="op">></span>) <span class="op">=</span> <span class="ident">bincode</span>::<span class="ident">deserialize</span>(<span class="kw-2">&</span><span class="ident">message_ser</span>).<span class="ident">unwrap</span>();
|
||
<span class="macro">assert_eq</span><span class="macro">!</span>(<span class="ident">recieved_message</span>, <span class="ident">message</span>);
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_sufficient_difficulty</span>(<span class="kw-2">&</span><span class="ident">message</span>.<span class="number">1</span>, <span class="ident">DIFFICULTY</span>));
|
||
<span class="macro">assert</span><span class="macro">!</span>(<span class="ident">config</span>.<span class="ident">is_valid_proof</span>(<span class="kw-2">&</span><span class="ident">message</span>.<span class="number">1</span>, <span class="kw-2">&</span><span class="ident">target</span>));
|
||
}
|
||
}
|
||
</pre></div>
|
||
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|
||
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