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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Generic transcript view (from either the prover or verifier’s perspective)"><meta name="keywords" content="rust, rustlang, rust-lang, Transcript"><title>Transcript in halo2_proofs::transcript - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../main.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.10.0/dist/katex.min.css" integrity="sha384-9eLZqc9ds8eNjO3TmqPeYcDj8n+Qfa4nuSiGYa6DjLNcv9BtN69ZIulL9+8CqC9Y" crossorigin="anonymous">
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</head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">☰</button><a class="sidebar-logo" href="../../halo2_proofs/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
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</a><h2 class="location"><a href="#">Transcript</a></h2><div class="sidebar-elems"><section><div class="block"><h3 class="sidebar-title"><a href="#required-methods">Required Methods</a></h3><ul><li><a href="#tymethod.common_point">common_point</a></li><li><a href="#tymethod.common_scalar">common_scalar</a></li><li><a href="#tymethod.squeeze_challenge">squeeze_challenge</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#provided-methods">Provided Methods</a></h3><ul><li><a href="#method.squeeze_challenge_scalar">squeeze_challenge_scalar</a></li></ul></div><div class="block"><h3 class="sidebar-title"><a href="#implementors">Implementors</a></h3></div></section><h2 class="location"><a href="index.html">In halo2_proofs::transcript</a></h2></div></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../halo2_proofs/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><button type="button" id="help-button" title="help">?</button><div id="settings-menu" tabindex="-1">
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<h1 class="fqn"><span class="in-band">Trait <a href="../index.html">halo2_proofs</a>::<wbr><a href="index.html">transcript</a>::<wbr><a class="trait" href="#">Transcript</a><button id="copy-path" onclick="copy_path(this)" title="Copy item path to clipboard"><img src="../../clipboard.svg" width="19" height="18" alt="Copy item path"></button></span></h1><span class="out-of-band"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#23-42">source</a> · <a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">[<span class="inner">−</span>]</a></span></div><div class="docblock item-decl"><pre class="rust trait"><code>pub trait Transcript<C: <a class="trait" href="../arithmetic/trait.CurveAffine.html" title="trait halo2_proofs::arithmetic::CurveAffine">CurveAffine</a>, E: <a class="trait" href="trait.EncodedChallenge.html" title="trait halo2_proofs::transcript::EncodedChallenge">EncodedChallenge</a><C>> {
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fn <a href="#tymethod.squeeze_challenge" class="fnname">squeeze_challenge</a>(&mut self) -> E;
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<span class="item-spacer"></span> fn <a href="#tymethod.common_point" class="fnname">common_point</a>(&mut self, point: C) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>>;
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<span class="item-spacer"></span> fn <a href="#tymethod.common_scalar" class="fnname">common_scalar</a>(&mut self, scalar: C::Scalar) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>>;
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fn <a href="#method.squeeze_challenge_scalar" class="fnname">squeeze_challenge_scalar</a><T>(&mut self) -> <a class="struct" href="struct.ChallengeScalar.html" title="struct halo2_proofs::transcript::ChallengeScalar">ChallengeScalar</a><C, T> { ... }
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}</code></pre></div><details class="rustdoc-toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Generic transcript view (from either the prover or verifier’s perspective)</p>
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</div></details><h2 id="required-methods" class="small-section-header">Required Methods<a href="#required-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="tymethod.squeeze_challenge" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#25">source</a></div><h4 class="code-header">fn <a href="#tymethod.squeeze_challenge" class="fnname">squeeze_challenge</a>(&mut self) -> E</h4></div></summary><div class="docblock"><p>Squeeze an encoded verifier challenge from the transcript.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.common_point" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#37">source</a></div><h4 class="code-header">fn <a href="#tymethod.common_point" class="fnname">common_point</a>(&mut self, point: C) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></h4></div></summary><div class="docblock"><p>Writing the point to the transcript without writing it to the proof,
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treating it as a common input.</p>
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</div></details><details class="rustdoc-toggle" open><summary><div id="tymethod.common_scalar" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#41">source</a></div><h4 class="code-header">fn <a href="#tymethod.common_scalar" class="fnname">common_scalar</a>(&mut self, scalar: C::Scalar) -> <a class="type" href="https://doc.rust-lang.org/nightly/std/io/error/type.Result.html" title="type std::io::error::Result">Result</a><<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.unit.html">()</a>></h4></div></summary><div class="docblock"><p>Writing the scalar to the transcript without writing it to the proof,
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treating it as a common input.</p>
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</div></details></div><h2 id="provided-methods" class="small-section-header">Provided Methods<a href="#provided-methods" class="anchor"></a></h2><div class="methods"><details class="rustdoc-toggle" open><summary><div id="method.squeeze_challenge_scalar" class="method has-srclink"><div class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#28-33">source</a></div><h4 class="code-header">fn <a href="#method.squeeze_challenge_scalar" class="fnname">squeeze_challenge_scalar</a><T>(&mut self) -> <a class="struct" href="struct.ChallengeScalar.html" title="struct halo2_proofs::transcript::ChallengeScalar">ChallengeScalar</a><C, T></h4></div></summary><div class="docblock"><p>Squeeze a typed challenge (in the scalar field) from the transcript.</p>
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</div></details></div><h2 id="implementors" class="small-section-header">Implementors<a href="#implementors" class="anchor"></a></h2><div class="item-list" id="implementors-list"><section id="impl-Transcript%3CC%2C%20Challenge255%3CC%3E%3E" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#115-145">source</a></span><a href="#impl-Transcript%3CC%2C%20Challenge255%3CC%3E%3E" class="anchor"></a><h3 class="code-header in-band">impl<R: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Read.html" title="trait std::io::Read">Read</a>, C: <a class="trait" href="../arithmetic/trait.CurveAffine.html" title="trait halo2_proofs::arithmetic::CurveAffine">CurveAffine</a>> <a class="trait" href="trait.Transcript.html" title="trait halo2_proofs::transcript::Transcript">Transcript</a><C, <a class="struct" href="struct.Challenge255.html" title="struct halo2_proofs::transcript::Challenge255">Challenge255</a><C>> for <a class="struct" href="struct.Blake2bRead.html" title="struct halo2_proofs::transcript::Blake2bRead">Blake2bRead</a><R, C, <a class="struct" href="struct.Challenge255.html" title="struct halo2_proofs::transcript::Challenge255">Challenge255</a><C>></h3></section><section id="impl-Transcript%3CC%2C%20Challenge255%3CC%3E%3E-1" class="impl has-srclink"><span class="rightside"><a class="srclink" href="../../src/halo2_proofs/transcript.rs.html#190-220">source</a></span><a href="#impl-Transcript%3CC%2C%20Challenge255%3CC%3E%3E-1" class="anchor"></a><h3 class="code-header in-band">impl<W: <a class="trait" href="https://doc.rust-lang.org/nightly/std/io/trait.Write.html" title="trait std::io::Write">Write</a>, C: <a class="trait" href="../arithmetic/trait.CurveAffine.html" title="trait halo2_proofs::arithmetic::CurveAffine">CurveAffine</a>> <a class="trait" href="trait.Transcript.html" title="trait halo2_proofs::transcript::Transcript">Transcript</a><C, <a class="struct" href="struct.Challenge255.html" title="struct halo2_proofs::transcript::Challenge255">Challenge255</a><C>> for <a class="struct" href="struct.Blake2bWrite.html" title="struct halo2_proofs::transcript::Blake2bWrite">Blake2bWrite</a><W, C, <a class="struct" href="struct.Challenge255.html" title="struct halo2_proofs::transcript::Challenge255">Challenge255</a><C>></h3></section></div><script type="text/javascript" src="../../implementors/halo2_proofs/transcript/trait.Transcript.js" data-ignore-extern-crates="" async></script></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="halo2_proofs" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.63.0-nightly (10f4ce324 2022-06-22)" ></div>
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