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<a href="https://gitlab.com/vivien_">Vivien Kraus Would Rather Not Be On Gitlab.com</a>
<a href="https://gitlab.com/gnutls/guile/-/issues/18#note_1522341505">commented</a>:
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<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">Hello! This is just an issue with the format strings: it removes leading zeros for each individual byte.</p>
<p dir="auto" style="color: #333238; margin: 0 0 16px;" align="initial">The Guile manual for format has a few examples with the format options, and I think this format is what you want, to have 2-character hex numbers padded with 0:</p>
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<pre data-canonical-lang="scheme" class="code highlight js-syntax-highlight language-scheme" lang="scheme" v-pre="true" style='display: block; font-size: 14px; color: #333238; line-height: 1.6em; overflow-x: auto; border-radius: 4px; position: relative; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 16px; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: 0.875rem; color: inherit; word-wrap: normal; word-break: keep-all; background-color: inherit; border-radius: 4px; white-space: pre; margin-top: 0; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="scheme" style="margin-top: 0;"><span class="p" style="margin-top: 0;">(</span><span class="nf">use-modules</span> <span class="p">(</span><span class="nf">rnrs</span> <span class="nv">bytevectors</span><span class="p">)</span> <span class="p">(</span><span class="nf">srfi</span> <span class="nv">srfi-26</span><span class="p">))</span></span>
<span id="LC2" class="line" lang="scheme"></span>
<span id="LC3" class="line" lang="scheme"><span class="p" style="margin-top: 0;">(</span><span class="nf">string-join</span></span>
<span id="LC4" class="line" lang="scheme"> <span class="p" style="margin-top: 0;">(</span><span class="nb">map</span> <span class="p">(</span><span class="nf">cut</span> <span class="nv">format</span> <span class="no">#f</span> <span class="s">"~2,'0x"</span> <span class="nv"><></span><span class="p">)</span></span>
<span id="LC5" class="line" lang="scheme"> <span class="p" style="margin-top: 0;">(</span><span class="nf">bytevector->u8-list</span> <span class="p">(</span><span class="nf">hash-direct</span> <span class="nv">digest/sha256</span></span>
<span id="LC6" class="line" lang="scheme"> <span class="p" style="margin-top: 0;">(</span><span class="nf">string->utf8</span> <span class="s">"test"</span><span class="p">))))</span></span>
<span id="LC7" class="line" lang="scheme"> <span class="s" style="margin-top: 0;">""</span><span class="p">)</span></span></code></pre>
<copy-code></copy-code>
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<p dir="auto" style="color: #333238; margin: 0;" align="initial">I get <code style='font-size: 0.875rem; color: #1f1e24; word-wrap: break-word; background-color: #ececef; border-radius: 4px; margin-top: 0; font-weight: inherit; font-family: var(--default-mono-font, "GitLab Mono"),"JetBrains Mono","Menlo","DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; white-space: pre-wrap; overflow-wrap: break-word; word-break: keep-all; padding: 2px 4px;'>"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"</code></p>
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