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 554 </pre><div class="example-wrap"><pre class="rust ">
 555 <span class="comment">// Magical Bitcoin Library</span>
 556 <span class="comment">// Written in 2020 by</span>
 557 <span class="comment">//     Alekos Filini &lt;alekos.filini@gmail.com&gt;</span>
 558 <span class="comment">//</span>
 559 <span class="comment">// Copyright (c) 2020 Magical Bitcoin</span>
 560 <span class="comment">//</span>
 561 <span class="comment">// Permission is hereby granted, free of charge, to any person obtaining a copy</span>
 562 <span class="comment">// of this software and associated documentation files (the &quot;Software&quot;), to deal</span>
 563 <span class="comment">// in the Software without restriction, including without limitation the rights</span>
 564 <span class="comment">// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</span>
 565 <span class="comment">// copies of the Software, and to permit persons to whom the Software is</span>
 566 <span class="comment">// furnished to do so, subject to the following conditions:</span>
 567 <span class="comment">//</span>
 568 <span class="comment">// The above copyright notice and this permission notice shall be included in all</span>
 569 <span class="comment">// copies or substantial portions of the Software.</span>
 570 <span class="comment">//</span>
 571 <span class="comment">// THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span>
 572 <span class="comment">// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span>
 573 <span class="comment">// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span>
 574 <span class="comment">// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span>
 575 <span class="comment">// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span>
 576 <span class="comment">// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span>
 577 <span class="comment">// SOFTWARE.</span>
 578
 579 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashMap</span>;
 580 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">net</span>::{<span class="ident">TcpStream</span>, <span class="ident">ToSocketAddrs</span>};
 581 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::{<span class="ident">Arc</span>, <span class="ident">Condvar</span>, <span class="ident">Mutex</span>, <span class="ident">RwLock</span>};
 582 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">thread</span>;
 583 <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">time</span>::{<span class="ident">Duration</span>, <span class="ident">SystemTime</span>, <span class="ident">UNIX_EPOCH</span>};
 584
 585 <span class="kw">use</span> <span class="ident">socks</span>::{<span class="ident">Socks5Stream</span>, <span class="ident">ToTargetAddr</span>};
 586
 587 <span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">thread_rng</span>, <span class="ident">Rng</span>};
 588
 589 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">consensus</span>::<span class="ident">Encodable</span>;
 590 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">hash_types</span>::<span class="ident">BlockHash</span>;
 591 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">hashes</span>::<span class="ident">Hash</span>;
 592 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">constants</span>::<span class="ident">ServiceFlags</span>;
 593 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">message</span>::{<span class="ident">NetworkMessage</span>, <span class="ident">RawNetworkMessage</span>};
 594 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">message_blockdata</span>::<span class="kw-2">*</span>;
 595 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">message_filter</span>::<span class="kw-2">*</span>;
 596 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">message_network</span>::<span class="ident">VersionMessage</span>;
 597 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">stream_reader</span>::<span class="ident">StreamReader</span>;
 598 <span class="kw">use</span> <span class="ident">bitcoin</span>::<span class="ident">network</span>::<span class="ident">Address</span>;
 599 <span class="kw">use</span> <span class="ident">bitcoin</span>::{<span class="ident">Block</span>, <span class="ident">Network</span>, <span class="ident">Transaction</span>, <span class="ident">Txid</span>};
 600
 601 <span class="kw">use</span> <span class="kw">super</span>::<span class="ident">CompactFiltersError</span>;
 602
 603 <span class="kw">type</span> <span class="ident">ResponsesMap</span> <span class="op">=</span> <span class="ident">HashMap</span><span class="op">&lt;</span><span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span>, <span class="ident">Arc</span><span class="op">&lt;</span>(<span class="ident">Mutex</span><span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">NetworkMessage</span><span class="op">&gt;</span><span class="op">&gt;</span>, <span class="ident">Condvar</span>)<span class="op">&gt;</span><span class="op">&gt;</span>;
 604
 605 <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">const</span> <span class="ident">TIMEOUT_SECS</span>: <span class="ident">u64</span> <span class="op">=</span> <span class="number">30</span>;
 606
 607 <span class="doccomment">/// Container for unconfirmed, but valid Bitcoin transactions</span>
 608 <span class="doccomment">///</span>
 609 <span class="doccomment">/// It is normally shared between [`Peer`]s with the use of [`Arc`], so that transactions are not</span>
 610 <span class="doccomment">/// duplicated in memory.</span>
 611 <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>, <span class="ident">Default</span>)]</span>
 612 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Mempool</span> {
 613     <span class="ident">txs</span>: <span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">HashMap</span><span class="op">&lt;</span><span class="ident">Txid</span>, <span class="ident">Transaction</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 614 }
 615
 616 <span class="kw">impl</span> <span class="ident">Mempool</span> {
 617     <span class="doccomment">/// Add a transaction to the mempool</span>
 618     <span class="doccomment">///</span>
 619     <span class="doccomment">/// Note that this doesn&#39;t propagate the transaction to other</span>
 620     <span class="doccomment">/// peers. To do that, [`broadcast`](crate::blockchain::Blockchain::broadcast) should be used.</span>
 621     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">add_tx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">tx</span>: <span class="ident">Transaction</span>) {
 622         <span class="self">self</span>.<span class="ident">txs</span>.<span class="ident">write</span>().<span class="ident">unwrap</span>().<span class="ident">insert</span>(<span class="ident">tx</span>.<span class="ident">txid</span>(), <span class="ident">tx</span>);
 623     }
 624
 625     <span class="doccomment">/// Look-up a transaction in the mempool given an [`Inventory`] request</span>
 626     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_tx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">inventory</span>: <span class="kw-2">&amp;</span><span class="ident">Inventory</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Transaction</span><span class="op">&gt;</span> {
 627         <span class="kw">let</span> <span class="ident">txid</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">inventory</span> {
 628             <span class="ident">Inventory</span>::<span class="ident">Error</span> <span class="op">|</span> <span class="ident">Inventory</span>::<span class="ident">Block</span>(<span class="kw">_</span>) <span class="op">|</span> <span class="ident">Inventory</span>::<span class="ident">WitnessBlock</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">None</span>,
 629             <span class="ident">Inventory</span>::<span class="ident">Transaction</span>(<span class="ident">txid</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="kw-2">*</span><span class="ident">txid</span>,
 630             <span class="ident">Inventory</span>::<span class="ident">WitnessTransaction</span>(<span class="ident">wtxid</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Txid</span>::<span class="ident">from_inner</span>(<span class="ident">wtxid</span>.<span class="ident">into_inner</span>()),
 631         };
 632         <span class="self">self</span>.<span class="ident">txs</span>.<span class="ident">read</span>().<span class="ident">unwrap</span>().<span class="ident">get</span>(<span class="kw-2">&amp;</span><span class="ident">txid</span>).<span class="ident">cloned</span>()
 633     }
 634
 635     <span class="doccomment">/// Return whether or not the mempool contains a transaction with a given txid</span>
 636     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">has_tx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">txid</span>: <span class="kw-2">&amp;</span><span class="ident">Txid</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
 637         <span class="self">self</span>.<span class="ident">txs</span>.<span class="ident">read</span>().<span class="ident">unwrap</span>().<span class="ident">contains_key</span>(<span class="ident">txid</span>)
 638     }
 639
 640     <span class="doccomment">/// Return the list of transactions contained in the mempool</span>
 641     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">iter_txs</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Transaction</span><span class="op">&gt;</span> {
 642         <span class="self">self</span>.<span class="ident">txs</span>.<span class="ident">read</span>().<span class="ident">unwrap</span>().<span class="ident">values</span>().<span class="ident">cloned</span>().<span class="ident">collect</span>()
 643     }
 644 }
 645
 646 <span class="doccomment">/// A Bitcoin peer</span>
 647 <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Debug</span>)]</span>
 648 <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Peer</span> {
 649     <span class="ident">writer</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mutex</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 650     <span class="ident">responses</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">ResponsesMap</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 651
 652     <span class="ident">reader_thread</span>: <span class="ident">thread</span>::<span class="ident">JoinHandle</span><span class="op">&lt;</span>()<span class="op">&gt;</span>,
 653     <span class="ident">connected</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">bool</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 654
 655     <span class="ident">mempool</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span>,
 656
 657     <span class="ident">version</span>: <span class="ident">VersionMessage</span>,
 658     <span class="ident">network</span>: <span class="ident">Network</span>,
 659 }
 660
 661 <span class="kw">impl</span> <span class="ident">Peer</span> {
 662     <span class="doccomment">/// Connect to a peer over a plaintext TCP connection</span>
 663     <span class="doccomment">///</span>
 664     <span class="doccomment">/// This function internally spawns a new thread that will monitor incoming messages from the</span>
 665     <span class="doccomment">/// peer, and optionally reply to some of them transparently, like [pings](bitcoin::network::message::NetworkMessage::Ping)</span>
 666     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect</span><span class="op">&lt;</span><span class="ident">A</span>: <span class="ident">ToSocketAddrs</span><span class="op">&gt;</span>(
 667         <span class="ident">address</span>: <span class="ident">A</span>,
 668         <span class="ident">mempool</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span>,
 669         <span class="ident">network</span>: <span class="ident">Network</span>,
 670     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="self">Self</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 671         <span class="kw">let</span> <span class="ident">stream</span> <span class="op">=</span> <span class="ident">TcpStream</span>::<span class="ident">connect</span>(<span class="ident">address</span>)<span class="question-mark">?</span>;
 672
 673         <span class="ident">Peer</span>::<span class="ident">from_stream</span>(<span class="ident">stream</span>, <span class="ident">mempool</span>, <span class="ident">network</span>)
 674     }
 675
 676     <span class="doccomment">/// Connect to a peer through a SOCKS5 proxy, optionally by using some credentials, specified</span>
 677     <span class="doccomment">/// as a tuple of `(username, password)`</span>
 678     <span class="doccomment">///</span>
 679     <span class="doccomment">/// This function internally spawns a new thread that will monitor incoming messages from the</span>
 680     <span class="doccomment">/// peer, and optionally reply to some of them transparently, like [pings](NetworkMessage::Ping)</span>
 681     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">connect_proxy</span><span class="op">&lt;</span><span class="ident">T</span>: <span class="ident">ToTargetAddr</span>, <span class="ident">P</span>: <span class="ident">ToSocketAddrs</span><span class="op">&gt;</span>(
 682         <span class="ident">target</span>: <span class="ident">T</span>,
 683         <span class="ident">proxy</span>: <span class="ident">P</span>,
 684         <span class="ident">credentials</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="kw-2">&amp;</span><span class="ident">str</span>)<span class="op">&gt;</span>,
 685         <span class="ident">mempool</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span>,
 686         <span class="ident">network</span>: <span class="ident">Network</span>,
 687     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="self">Self</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 688         <span class="kw">let</span> <span class="ident">socks_stream</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>((<span class="ident">username</span>, <span class="ident">password</span>)) <span class="op">=</span> <span class="ident">credentials</span> {
 689             <span class="ident">Socks5Stream</span>::<span class="ident">connect_with_password</span>(<span class="ident">proxy</span>, <span class="ident">target</span>, <span class="ident">username</span>, <span class="ident">password</span>)<span class="question-mark">?</span>
 690         } <span class="kw">else</span> {
 691             <span class="ident">Socks5Stream</span>::<span class="ident">connect</span>(<span class="ident">proxy</span>, <span class="ident">target</span>)<span class="question-mark">?</span>
 692         };
 693
 694         <span class="ident">Peer</span>::<span class="ident">from_stream</span>(<span class="ident">socks_stream</span>.<span class="ident">into_inner</span>(), <span class="ident">mempool</span>, <span class="ident">network</span>)
 695     }
 696
 697     <span class="doccomment">/// Create a [`Peer`] from an already connected TcpStream</span>
 698     <span class="kw">fn</span> <span class="ident">from_stream</span>(
 699         <span class="ident">stream</span>: <span class="ident">TcpStream</span>,
 700         <span class="ident">mempool</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span>,
 701         <span class="ident">network</span>: <span class="ident">Network</span>,
 702     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="self">Self</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 703         <span class="kw">let</span> <span class="ident">writer</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">new</span>(<span class="ident">Mutex</span>::<span class="ident">new</span>(<span class="ident">stream</span>.<span class="ident">try_clone</span>()<span class="question-mark">?</span>));
 704         <span class="kw">let</span> <span class="ident">responses</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">ResponsesMap</span><span class="op">&gt;</span><span class="op">&gt;</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">new</span>(<span class="ident">RwLock</span>::<span class="ident">new</span>(<span class="ident">HashMap</span>::<span class="ident">new</span>()));
 705         <span class="kw">let</span> <span class="ident">connected</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">new</span>(<span class="ident">RwLock</span>::<span class="ident">new</span>(<span class="bool-val">true</span>));
 706
 707         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">locked_writer</span> <span class="op">=</span> <span class="ident">writer</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>();
 708
 709         <span class="kw">let</span> <span class="ident">reader_thread_responses</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">responses</span>);
 710         <span class="kw">let</span> <span class="ident">reader_thread_writer</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">writer</span>);
 711         <span class="kw">let</span> <span class="ident">reader_thread_mempool</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">mempool</span>);
 712         <span class="kw">let</span> <span class="ident">reader_thread_connected</span> <span class="op">=</span> <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">connected</span>);
 713         <span class="kw">let</span> <span class="ident">reader_thread</span> <span class="op">=</span> <span class="ident">thread</span>::<span class="ident">spawn</span>(<span class="kw">move</span> <span class="op">|</span><span class="op">|</span> {
 714             <span class="self">Self</span>::<span class="ident">reader_thread</span>(
 715                 <span class="ident">network</span>,
 716                 <span class="ident">stream</span>,
 717                 <span class="ident">reader_thread_responses</span>,
 718                 <span class="ident">reader_thread_writer</span>,
 719                 <span class="ident">reader_thread_mempool</span>,
 720                 <span class="ident">reader_thread_connected</span>,
 721             )
 722         });
 723
 724         <span class="kw">let</span> <span class="ident">timestamp</span> <span class="op">=</span> <span class="ident">SystemTime</span>::<span class="ident">now</span>().<span class="ident">duration_since</span>(<span class="ident">UNIX_EPOCH</span>)<span class="question-mark">?</span>.<span class="ident">as_secs</span>() <span class="kw">as</span> <span class="ident">i64</span>;
 725         <span class="kw">let</span> <span class="ident">nonce</span> <span class="op">=</span> <span class="ident">thread_rng</span>().<span class="ident">gen</span>();
 726         <span class="kw">let</span> <span class="ident">receiver</span> <span class="op">=</span> <span class="ident">Address</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">locked_writer</span>.<span class="ident">peer_addr</span>()<span class="question-mark">?</span>, <span class="ident">ServiceFlags</span>::<span class="ident">NONE</span>);
 727         <span class="kw">let</span> <span class="ident">sender</span> <span class="op">=</span> <span class="ident">Address</span> {
 728             <span class="ident">services</span>: <span class="ident">ServiceFlags</span>::<span class="ident">NONE</span>,
 729             <span class="ident">address</span>: [<span class="number">0u16</span>; <span class="number">8</span>],
 730             <span class="ident">port</span>: <span class="number">0</span>,
 731         };
 732
 733         <span class="self">Self</span>::<span class="ident">_send</span>(
 734             <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">locked_writer</span>,
 735             <span class="ident">network</span>.<span class="ident">magic</span>(),
 736             <span class="ident">NetworkMessage</span>::<span class="ident">Version</span>(<span class="ident">VersionMessage</span>::<span class="ident">new</span>(
 737                 <span class="ident">ServiceFlags</span>::<span class="ident">WITNESS</span>,
 738                 <span class="ident">timestamp</span>,
 739                 <span class="ident">receiver</span>,
 740                 <span class="ident">sender</span>,
 741                 <span class="ident">nonce</span>,
 742                 <span class="string">&quot;MagicalBitcoinWallet&quot;</span>.<span class="ident">into</span>(),
 743                 <span class="number">0</span>,
 744             )),
 745         )<span class="question-mark">?</span>;
 746         <span class="kw">let</span> <span class="ident">version</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="ident">NetworkMessage</span>::<span class="ident">Version</span>(<span class="ident">version</span>) <span class="op">=</span>
 747             <span class="self">Self</span>::<span class="ident">_recv</span>(<span class="kw-2">&amp;</span><span class="ident">responses</span>, <span class="string">&quot;version&quot;</span>, <span class="prelude-val">None</span>)<span class="question-mark">?</span>.<span class="ident">unwrap</span>()
 748         {
 749             <span class="ident">version</span>
 750         } <span class="kw">else</span> {
 751             <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>);
 752         };
 753
 754         <span class="kw">if</span> <span class="kw">let</span> <span class="ident">NetworkMessage</span>::<span class="ident">Verack</span> <span class="op">=</span> <span class="self">Self</span>::<span class="ident">_recv</span>(<span class="kw-2">&amp;</span><span class="ident">responses</span>, <span class="string">&quot;verack&quot;</span>, <span class="prelude-val">None</span>)<span class="question-mark">?</span>.<span class="ident">unwrap</span>() {
 755             <span class="self">Self</span>::<span class="ident">_send</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">locked_writer</span>, <span class="ident">network</span>.<span class="ident">magic</span>(), <span class="ident">NetworkMessage</span>::<span class="ident">Verack</span>)<span class="question-mark">?</span>;
 756         } <span class="kw">else</span> {
 757             <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>);
 758         }
 759
 760         <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">drop</span>(<span class="ident">locked_writer</span>);
 761
 762         <span class="prelude-val">Ok</span>(<span class="ident">Peer</span> {
 763             <span class="ident">writer</span>,
 764             <span class="ident">reader_thread</span>,
 765             <span class="ident">responses</span>,
 766             <span class="ident">connected</span>,
 767             <span class="ident">mempool</span>,
 768             <span class="ident">network</span>,
 769             <span class="ident">version</span>,
 770         })
 771     }
 772
 773     <span class="doccomment">/// Send a Bitcoin network message</span>
 774     <span class="kw">fn</span> <span class="ident">_send</span>(
 775         <span class="ident">writer</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">TcpStream</span>,
 776         <span class="ident">magic</span>: <span class="ident">u32</span>,
 777         <span class="ident">payload</span>: <span class="ident">NetworkMessage</span>,
 778     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 779         <span class="ident">log</span>::<span class="macro">trace</span><span class="macro">!</span>(<span class="string">&quot;==&gt; {:?}&quot;</span>, <span class="ident">payload</span>);
 780
 781         <span class="kw">let</span> <span class="ident">raw_message</span> <span class="op">=</span> <span class="ident">RawNetworkMessage</span> { <span class="ident">magic</span>, <span class="ident">payload</span> };
 782
 783         <span class="ident">raw_message</span>
 784             .<span class="ident">consensus_encode</span>(<span class="ident">writer</span>)
 785             .<span class="ident">map_err</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">CompactFiltersError</span>::<span class="ident">DataCorruption</span>)<span class="question-mark">?</span>;
 786
 787         <span class="prelude-val">Ok</span>(())
 788     }
 789
 790     <span class="doccomment">/// Wait for a specific incoming Bitcoin message, optionally with a timeout</span>
 791     <span class="kw">fn</span> <span class="ident">_recv</span>(
 792         <span class="ident">responses</span>: <span class="kw-2">&amp;</span><span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">ResponsesMap</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 793         <span class="ident">wait_for</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span>,
 794         <span class="ident">timeout</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span>,
 795     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">NetworkMessage</span><span class="op">&gt;</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 796         <span class="kw">let</span> <span class="ident">message_resp</span> <span class="op">=</span> {
 797             <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">responses</span>.<span class="ident">write</span>().<span class="ident">unwrap</span>();
 798             <span class="kw">let</span> <span class="ident">message_resp</span> <span class="op">=</span> <span class="ident">lock</span>.<span class="ident">entry</span>(<span class="ident">wait_for</span>).<span class="ident">or_default</span>();
 799             <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">message_resp</span>)
 800         };
 801
 802         <span class="kw">let</span> (<span class="ident">lock</span>, <span class="ident">cvar</span>) <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">*</span><span class="ident">message_resp</span>;
 803
 804         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">messages</span> <span class="op">=</span> <span class="ident">lock</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>();
 805         <span class="kw">while</span> <span class="ident">messages</span>.<span class="ident">is_empty</span>() {
 806             <span class="kw">match</span> <span class="ident">timeout</span> {
 807                 <span class="prelude-val">None</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">messages</span> <span class="op">=</span> <span class="ident">cvar</span>.<span class="ident">wait</span>(<span class="ident">messages</span>).<span class="ident">unwrap</span>(),
 808                 <span class="prelude-val">Some</span>(<span class="ident">t</span>) <span class="op">=</span><span class="op">&gt;</span> {
 809                     <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">cvar</span>.<span class="ident">wait_timeout</span>(<span class="ident">messages</span>, <span class="ident">t</span>).<span class="ident">unwrap</span>();
 810                     <span class="kw">if</span> <span class="ident">result</span>.<span class="number">1</span>.<span class="ident">timed_out</span>() {
 811                         <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>);
 812                     }
 813
 814                     <span class="ident">messages</span> <span class="op">=</span> <span class="ident">result</span>.<span class="number">0</span>;
 815                 }
 816             }
 817         }
 818
 819         <span class="prelude-val">Ok</span>(<span class="ident">messages</span>.<span class="ident">pop</span>())
 820     }
 821
 822     <span class="doccomment">/// Return the [`VersionMessage`] sent by the peer</span>
 823     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_version</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">VersionMessage</span> {
 824         <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">version</span>
 825     }
 826
 827     <span class="doccomment">/// Return the Bitcoin [`Network`] in use</span>
 828     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_network</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Network</span> {
 829         <span class="self">self</span>.<span class="ident">network</span>
 830     }
 831
 832     <span class="doccomment">/// Return the mempool used by this peer</span>
 833     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_mempool</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span> {
 834         <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">mempool</span>)
 835     }
 836
 837     <span class="doccomment">/// Return whether or not the peer is still connected</span>
 838     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">is_connected</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
 839         <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">connected</span>.<span class="ident">read</span>().<span class="ident">unwrap</span>()
 840     }
 841
 842     <span class="doccomment">/// Internal function called once the `reader_thread` is spawned</span>
 843     <span class="kw">fn</span> <span class="ident">reader_thread</span>(
 844         <span class="ident">network</span>: <span class="ident">Network</span>,
 845         <span class="ident">connection</span>: <span class="ident">TcpStream</span>,
 846         <span class="ident">reader_thread_responses</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">ResponsesMap</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 847         <span class="ident">reader_thread_writer</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mutex</span><span class="op">&lt;</span><span class="ident">TcpStream</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 848         <span class="ident">reader_thread_mempool</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">Mempool</span><span class="op">&gt;</span>,
 849         <span class="ident">reader_thread_connected</span>: <span class="ident">Arc</span><span class="op">&lt;</span><span class="ident">RwLock</span><span class="op">&lt;</span><span class="ident">bool</span><span class="op">&gt;</span><span class="op">&gt;</span>,
 850     ) {
 851         <span class="macro">macro_rules</span><span class="macro">!</span> <span class="ident">check_disconnect</span> {
 852             (<span class="macro-nonterminal">$</span><span class="macro-nonterminal">call</span>:<span class="ident">expr</span>) <span class="op">=</span><span class="op">&gt;</span> {
 853                 <span class="kw">match</span> <span class="macro-nonterminal">$</span><span class="macro-nonterminal">call</span> {
 854                     <span class="prelude-val">Ok</span>(<span class="ident">good</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">good</span>,
 855                     <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=</span><span class="op">&gt;</span> {
 856                         <span class="ident">log</span>::<span class="macro">debug</span><span class="macro">!</span>(<span class="string">&quot;Error {:?}&quot;</span>, <span class="ident">e</span>);
 857                         <span class="kw-2">*</span><span class="ident">reader_thread_connected</span>.<span class="ident">write</span>().<span class="ident">unwrap</span>() <span class="op">=</span> <span class="bool-val">false</span>;
 858
 859                         <span class="kw">break</span>;
 860                     }
 861                 }
 862             };
 863         }
 864
 865         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">reader</span> <span class="op">=</span> <span class="ident">StreamReader</span>::<span class="ident">new</span>(<span class="ident">connection</span>, <span class="prelude-val">None</span>);
 866         <span class="kw">loop</span> {
 867             <span class="kw">let</span> <span class="ident">raw_message</span>: <span class="ident">RawNetworkMessage</span> <span class="op">=</span> <span class="macro">check_disconnect</span><span class="macro">!</span>(<span class="ident">reader</span>.<span class="ident">read_next</span>());
 868
 869             <span class="kw">let</span> <span class="ident">in_message</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">raw_message</span>.<span class="ident">magic</span> <span class="op">!</span><span class="op">=</span> <span class="ident">network</span>.<span class="ident">magic</span>() {
 870                 <span class="kw">continue</span>;
 871             } <span class="kw">else</span> {
 872                 <span class="ident">raw_message</span>.<span class="ident">payload</span>
 873             };
 874
 875             <span class="ident">log</span>::<span class="macro">trace</span><span class="macro">!</span>(<span class="string">&quot;&lt;== {:?}&quot;</span>, <span class="ident">in_message</span>);
 876
 877             <span class="kw">match</span> <span class="ident">in_message</span> {
 878                 <span class="ident">NetworkMessage</span>::<span class="ident">Ping</span>(<span class="ident">nonce</span>) <span class="op">=</span><span class="op">&gt;</span> {
 879                     <span class="macro">check_disconnect</span><span class="macro">!</span>(<span class="self">Self</span>::<span class="ident">_send</span>(
 880                         <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">reader_thread_writer</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>(),
 881                         <span class="ident">network</span>.<span class="ident">magic</span>(),
 882                         <span class="ident">NetworkMessage</span>::<span class="ident">Pong</span>(<span class="ident">nonce</span>),
 883                     ));
 884
 885                     <span class="kw">continue</span>;
 886                 }
 887                 <span class="ident">NetworkMessage</span>::<span class="ident">Alert</span>(<span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="kw">continue</span>,
 888                 <span class="ident">NetworkMessage</span>::<span class="ident">GetData</span>(<span class="kw-2">ref</span> <span class="ident">inv</span>) <span class="op">=</span><span class="op">&gt;</span> {
 889                     <span class="kw">let</span> (<span class="ident">found</span>, <span class="ident">not_found</span>): (<span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span>, <span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span>) <span class="op">=</span> <span class="ident">inv</span>
 890                         .<span class="ident">into_iter</span>()
 891                         .<span class="ident">map</span>(<span class="op">|</span><span class="ident">item</span><span class="op">|</span> (<span class="kw-2">*</span><span class="ident">item</span>, <span class="ident">reader_thread_mempool</span>.<span class="ident">get_tx</span>(<span class="ident">item</span>)))
 892                         .<span class="ident">partition</span>(<span class="op">|</span>(<span class="kw">_</span>, <span class="ident">d</span>)<span class="op">|</span> <span class="ident">d</span>.<span class="ident">is_some</span>());
 893                     <span class="kw">for</span> (<span class="kw">_</span>, <span class="ident">found_tx</span>) <span class="kw">in</span> <span class="ident">found</span> {
 894                         <span class="macro">check_disconnect</span><span class="macro">!</span>(<span class="self">Self</span>::<span class="ident">_send</span>(
 895                             <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">reader_thread_writer</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>(),
 896                             <span class="ident">network</span>.<span class="ident">magic</span>(),
 897                             <span class="ident">NetworkMessage</span>::<span class="ident">Tx</span>(<span class="ident">found_tx</span>.<span class="ident">unwrap</span>()),
 898                         ));
 899                     }
 900
 901                     <span class="kw">if</span> <span class="op">!</span><span class="ident">not_found</span>.<span class="ident">is_empty</span>() {
 902                         <span class="macro">check_disconnect</span><span class="macro">!</span>(<span class="self">Self</span>::<span class="ident">_send</span>(
 903                             <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">reader_thread_writer</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>(),
 904                             <span class="ident">network</span>.<span class="ident">magic</span>(),
 905                             <span class="ident">NetworkMessage</span>::<span class="ident">NotFound</span>(
 906                                 <span class="ident">not_found</span>.<span class="ident">into_iter</span>().<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">i</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">i</span>).<span class="ident">collect</span>(),
 907                             ),
 908                         ));
 909                     }
 910                 }
 911                 <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> {}
 912             }
 913
 914             <span class="kw">let</span> <span class="ident">message_resp</span> <span class="op">=</span> {
 915                 <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">lock</span> <span class="op">=</span> <span class="ident">reader_thread_responses</span>.<span class="ident">write</span>().<span class="ident">unwrap</span>();
 916                 <span class="kw">let</span> <span class="ident">message_resp</span> <span class="op">=</span> <span class="ident">lock</span>.<span class="ident">entry</span>(<span class="ident">in_message</span>.<span class="ident">cmd</span>()).<span class="ident">or_default</span>();
 917                 <span class="ident">Arc</span>::<span class="ident">clone</span>(<span class="kw-2">&amp;</span><span class="ident">message_resp</span>)
 918             };
 919
 920             <span class="kw">let</span> (<span class="ident">lock</span>, <span class="ident">cvar</span>) <span class="op">=</span> <span class="kw-2">&amp;</span><span class="kw-2">*</span><span class="ident">message_resp</span>;
 921             <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">messages</span> <span class="op">=</span> <span class="ident">lock</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>();
 922             <span class="ident">messages</span>.<span class="ident">push</span>(<span class="ident">in_message</span>);
 923             <span class="ident">cvar</span>.<span class="ident">notify_all</span>();
 924         }
 925     }
 926
 927     <span class="doccomment">/// Send a raw Bitcoin message to the peer</span>
 928     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">send</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">payload</span>: <span class="ident">NetworkMessage</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 929         <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">writer</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">writer</span>.<span class="ident">lock</span>().<span class="ident">unwrap</span>();
 930         <span class="self">Self</span>::<span class="ident">_send</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">writer</span>, <span class="self">self</span>.<span class="ident">network</span>.<span class="ident">magic</span>(), <span class="ident">payload</span>)
 931     }
 932
 933     <span class="doccomment">/// Waits for a specific incoming Bitcoin message, optionally with a timeout</span>
 934     <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recv</span>(
 935         <span class="kw-2">&amp;</span><span class="self">self</span>,
 936         <span class="ident">wait_for</span>: <span class="kw-2">&amp;</span><span class="lifetime">&#39;static</span> <span class="ident">str</span>,
 937         <span class="ident">timeout</span>: <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Duration</span><span class="op">&gt;</span>,
 938     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">NetworkMessage</span><span class="op">&gt;</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 939         <span class="self">Self</span>::<span class="ident">_recv</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">responses</span>, <span class="ident">wait_for</span>, <span class="ident">timeout</span>)
 940     }
 941 }
 942
 943 <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">CompactFiltersPeer</span> {
 944     <span class="kw">fn</span> <span class="ident">get_cf_checkpt</span>(
 945         <span class="kw-2">&amp;</span><span class="self">self</span>,
 946         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
 947         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
 948     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFCheckpt</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
 949     <span class="kw">fn</span> <span class="ident">get_cf_headers</span>(
 950         <span class="kw-2">&amp;</span><span class="self">self</span>,
 951         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
 952         <span class="ident">start_height</span>: <span class="ident">u32</span>,
 953         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
 954     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFHeaders</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
 955     <span class="kw">fn</span> <span class="ident">get_cf_filters</span>(
 956         <span class="kw-2">&amp;</span><span class="self">self</span>,
 957         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
 958         <span class="ident">start_height</span>: <span class="ident">u32</span>,
 959         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
 960     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
 961     <span class="kw">fn</span> <span class="ident">pop_cf_filter_resp</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFilter</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
 962 }
 963
 964 <span class="kw">impl</span> <span class="ident">CompactFiltersPeer</span> <span class="kw">for</span> <span class="ident">Peer</span> {
 965     <span class="kw">fn</span> <span class="ident">get_cf_checkpt</span>(
 966         <span class="kw-2">&amp;</span><span class="self">self</span>,
 967         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
 968         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
 969     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFCheckpt</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 970         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">GetCFCheckpt</span>(<span class="ident">GetCFCheckpt</span> {
 971             <span class="ident">filter_type</span>,
 972             <span class="ident">stop_hash</span>,
 973         }))<span class="question-mark">?</span>;
 974
 975         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="self">self</span>
 976             .<span class="ident">recv</span>(<span class="string">&quot;cfcheckpt&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="ident">TIMEOUT_SECS</span>)))<span class="question-mark">?</span>
 977             .<span class="ident">ok_or</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">Timeout</span>)<span class="question-mark">?</span>;
 978         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">response</span> {
 979             <span class="ident">NetworkMessage</span>::<span class="ident">CFCheckpt</span>(<span class="ident">response</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">response</span>,
 980             <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
 981         };
 982
 983         <span class="kw">if</span> <span class="ident">response</span>.<span class="ident">filter_type</span> <span class="op">!</span><span class="op">=</span> <span class="ident">filter_type</span> {
 984             <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>);
 985         }
 986
 987         <span class="prelude-val">Ok</span>(<span class="ident">response</span>)
 988     }
 989
 990     <span class="kw">fn</span> <span class="ident">get_cf_headers</span>(
 991         <span class="kw-2">&amp;</span><span class="self">self</span>,
 992         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
 993         <span class="ident">start_height</span>: <span class="ident">u32</span>,
 994         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
 995     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFHeaders</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
 996         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">GetCFHeaders</span>(<span class="ident">GetCFHeaders</span> {
 997             <span class="ident">filter_type</span>,
 998             <span class="ident">start_height</span>,
 999             <span class="ident">stop_hash</span>,
1000         }))<span class="question-mark">?</span>;
1001
1002         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="self">self</span>
1003             .<span class="ident">recv</span>(<span class="string">&quot;cfheaders&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="ident">TIMEOUT_SECS</span>)))<span class="question-mark">?</span>
1004             .<span class="ident">ok_or</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">Timeout</span>)<span class="question-mark">?</span>;
1005         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">response</span> {
1006             <span class="ident">NetworkMessage</span>::<span class="ident">CFHeaders</span>(<span class="ident">response</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">response</span>,
1007             <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
1008         };
1009
1010         <span class="kw">if</span> <span class="ident">response</span>.<span class="ident">filter_type</span> <span class="op">!</span><span class="op">=</span> <span class="ident">filter_type</span> {
1011             <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>);
1012         }
1013
1014         <span class="prelude-val">Ok</span>(<span class="ident">response</span>)
1015     }
1016
1017     <span class="kw">fn</span> <span class="ident">pop_cf_filter_resp</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CFilter</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
1018         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="self">self</span>
1019             .<span class="ident">recv</span>(<span class="string">&quot;cfilter&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="ident">TIMEOUT_SECS</span>)))<span class="question-mark">?</span>
1020             .<span class="ident">ok_or</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">Timeout</span>)<span class="question-mark">?</span>;
1021         <span class="kw">let</span> <span class="ident">response</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">response</span> {
1022             <span class="ident">NetworkMessage</span>::<span class="ident">CFilter</span>(<span class="ident">response</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">response</span>,
1023             <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
1024         };
1025
1026         <span class="prelude-val">Ok</span>(<span class="ident">response</span>)
1027     }
1028
1029     <span class="kw">fn</span> <span class="ident">get_cf_filters</span>(
1030         <span class="kw-2">&amp;</span><span class="self">self</span>,
1031         <span class="ident">filter_type</span>: <span class="ident">u8</span>,
1032         <span class="ident">start_height</span>: <span class="ident">u32</span>,
1033         <span class="ident">stop_hash</span>: <span class="ident">BlockHash</span>,
1034     ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
1035         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">GetCFilters</span>(<span class="ident">GetCFilters</span> {
1036             <span class="ident">filter_type</span>,
1037             <span class="ident">start_height</span>,
1038             <span class="ident">stop_hash</span>,
1039         }))<span class="question-mark">?</span>;
1040
1041         <span class="prelude-val">Ok</span>(())
1042     }
1043 }
1044
1045 <span class="kw">pub</span> <span class="kw">trait</span> <span class="ident">InvPeer</span> {
1046     <span class="kw">fn</span> <span class="ident">get_block</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">block_hash</span>: <span class="ident">BlockHash</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Block</span><span class="op">&gt;</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
1047     <span class="kw">fn</span> <span class="ident">ask_for_mempool</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
1048     <span class="kw">fn</span> <span class="ident">broadcast_tx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">tx</span>: <span class="ident">Transaction</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span>;
1049 }
1050
1051 <span class="kw">impl</span> <span class="ident">InvPeer</span> <span class="kw">for</span> <span class="ident">Peer</span> {
1052     <span class="kw">fn</span> <span class="ident">get_block</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">block_hash</span>: <span class="ident">BlockHash</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Block</span><span class="op">&gt;</span>, <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
1053         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">GetData</span>(<span class="macro">vec</span><span class="macro">!</span>[<span class="ident">Inventory</span>::<span class="ident">WitnessBlock</span>(
1054             <span class="ident">block_hash</span>,
1055         )]))<span class="question-mark">?</span>;
1056
1057         <span class="kw">match</span> <span class="self">self</span>.<span class="ident">recv</span>(<span class="string">&quot;block&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="ident">TIMEOUT_SECS</span>)))<span class="question-mark">?</span> {
1058             <span class="prelude-val">None</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="prelude-val">None</span>),
1059             <span class="prelude-val">Some</span>(<span class="ident">NetworkMessage</span>::<span class="ident">Block</span>(<span class="ident">response</span>)) <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Ok</span>(<span class="prelude-val">Some</span>(<span class="ident">response</span>)),
1060             <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
1061         }
1062     }
1063
1064     <span class="kw">fn</span> <span class="ident">ask_for_mempool</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
1065         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">MemPool</span>)<span class="question-mark">?</span>;
1066         <span class="kw">let</span> <span class="ident">inv</span> <span class="op">=</span> <span class="kw">match</span> <span class="self">self</span>.<span class="ident">recv</span>(<span class="string">&quot;inv&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="number">5</span>)))<span class="question-mark">?</span> {
1067             <span class="prelude-val">None</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Ok</span>(()), <span class="comment">// empty mempool</span>
1068             <span class="prelude-val">Some</span>(<span class="ident">NetworkMessage</span>::<span class="ident">Inv</span>(<span class="ident">inv</span>)) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">inv</span>,
1069             <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
1070         };
1071
1072         <span class="kw">let</span> <span class="ident">getdata</span> <span class="op">=</span> <span class="ident">inv</span>
1073             .<span class="ident">iter</span>()
1074             .<span class="ident">cloned</span>()
1075             .<span class="ident">filter</span>(<span class="op">|</span><span class="ident">item</span><span class="op">|</span> <span class="kw">match</span> <span class="ident">item</span> {
1076                 <span class="ident">Inventory</span>::<span class="ident">Transaction</span>(<span class="ident">txid</span>) <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">mempool</span>.<span class="ident">has_tx</span>(<span class="ident">txid</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="bool-val">true</span>,
1077                 <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="bool-val">false</span>,
1078             })
1079             .<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>();
1080         <span class="kw">let</span> <span class="ident">num_txs</span> <span class="op">=</span> <span class="ident">getdata</span>.<span class="ident">len</span>();
1081         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">GetData</span>(<span class="ident">getdata</span>))<span class="question-mark">?</span>;
1082
1083         <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">num_txs</span> {
1084             <span class="kw">let</span> <span class="ident">tx</span> <span class="op">=</span> <span class="self">self</span>
1085                 .<span class="ident">recv</span>(<span class="string">&quot;tx&quot;</span>, <span class="prelude-val">Some</span>(<span class="ident">Duration</span>::<span class="ident">from_secs</span>(<span class="ident">TIMEOUT_SECS</span>)))<span class="question-mark">?</span>
1086                 .<span class="ident">ok_or</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">Timeout</span>)<span class="question-mark">?</span>;
1087             <span class="kw">let</span> <span class="ident">tx</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">tx</span> {
1088                 <span class="ident">NetworkMessage</span>::<span class="ident">Tx</span>(<span class="ident">tx</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">tx</span>,
1089                 <span class="kw">_</span> <span class="op">=</span><span class="op">&gt;</span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">CompactFiltersError</span>::<span class="ident">InvalidResponse</span>),
1090             };
1091
1092             <span class="self">self</span>.<span class="ident">mempool</span>.<span class="ident">add_tx</span>(<span class="ident">tx</span>);
1093         }
1094
1095         <span class="prelude-val">Ok</span>(())
1096     }
1097
1098     <span class="kw">fn</span> <span class="ident">broadcast_tx</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">tx</span>: <span class="ident">Transaction</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(), <span class="ident">CompactFiltersError</span><span class="op">&gt;</span> {
1099         <span class="self">self</span>.<span class="ident">mempool</span>.<span class="ident">add_tx</span>(<span class="ident">tx</span>.<span class="ident">clone</span>());
1100         <span class="self">self</span>.<span class="ident">send</span>(<span class="ident">NetworkMessage</span>::<span class="ident">Tx</span>(<span class="ident">tx</span>))<span class="question-mark">?</span>;
1101
1102         <span class="prelude-val">Ok</span>(())
1103     }
1104 }
1105 </pre></div>
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