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@@ -2,4 +2,4 @@
The following example shows how to create and account with keyring.
[include](index.js)
<<< @/docs/examples/keyring/01_create_account/index.js
@@ -1,443 +0,0 @@
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<h1 id="create-account">Create Account</h1>
<p>The following example shows how to create and account with keyring.</p>
<pre><code class="lang-javascript"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-comment">//&#xA0;Import&#xA0;Keyring&#xA0;class&#xA0;and&#xA0;utility&#xA0;function</span>
<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">Keyring</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/keyring&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">default</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">stringToU8a</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util/string/toU8a&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">default</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-ident">async</span>&#xA0;<span class="sunlight-keyword">function</span>&#xA0;<span class="sunlight-named-ident">main</span>&#xA0;<span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;account&#xA0;seed&#xA0;for&#xA0;Alice</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">ALICE_SEED</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-string">&apos;Alice&apos;</span><span class="sunlight-operator">.</span><span class="sunlight-ident">padEnd</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-string">&apos;&#xA0;&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;an&#xA0;instance&#xA0;of&#xA0;the&#xA0;Keyring</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">keyring</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-keyword">new</span>&#xA0;<span class="sunlight-ident">Keyring</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;pair&#xA0;and&#xA0;add&#xA0;Alice&#xA0;to&#xA0;keyring&#xA0;pair&#xA0;dictionary&#xA0;(with&#xA0;account&#xA0;seed)</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">pairAlice</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">keyring</span><span class="sunlight-operator">.</span><span class="sunlight-ident">addFromSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">ALICE_SEED</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Created</span>&#xA0;<span class="sunlight-ident">keyring</span>&#xA0;<span class="sunlight-ident">pair</span>&#xA0;<span class="sunlight-keyword">for</span>&#xA0;<span class="sunlight-ident">Alice</span>&#xA0;<span class="sunlight-keyword">with</span>&#xA0;<span class="sunlight-ident">address</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-punctuation">`</span>&#xA0;<span class="sunlight-operator">+</span>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-punctuation">`</span><span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">keyring</span><span class="sunlight-operator">.</span><span class="sunlight-ident">getPair</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">pairAlice</span><span class="sunlight-operator">.</span><span class="sunlight-ident">address</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-ident">address</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-punctuation">}</span>
<span class="sunlight-ident">main</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">catch</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">error</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">finally</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">_</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-ident">process</span><span class="sunlight-operator">.</span><span class="sunlight-ident">exit</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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The following example shows how to load all accounts from the keyring as pairs and convert them into JSON format.
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@@ -1,455 +0,0 @@
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<h1 id="load-accounts">Load Accounts</h1>
<p>The following example shows how to load all accounts from the keyring as pairs and convert them into JSON format.</p>
<pre><code class="lang-javascript"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-comment">//&#xA0;Import&#xA0;Keyring&#xA0;class&#xA0;and&#xA0;utility&#xA0;function</span>
<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">Keyring</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/keyring&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">default</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">stringToU8a</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util/string/toU8a&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">default</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-ident">async</span>&#xA0;<span class="sunlight-keyword">function</span>&#xA0;<span class="sunlight-named-ident">main</span>&#xA0;<span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;account&#xA0;seed&#xA0;for&#xA0;Alice&#xA0;and&#xA0;Bob</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">ALICE_SEED</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-string">&apos;Alice&apos;</span><span class="sunlight-operator">.</span><span class="sunlight-ident">padEnd</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-string">&apos;&#xA0;&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">BOB_SEED</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-string">&apos;Bob&apos;</span><span class="sunlight-operator">.</span><span class="sunlight-ident">padEnd</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-string">&apos;&#xA0;&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;an&#xA0;instance&#xA0;of&#xA0;the&#xA0;Keyring</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">keyring</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-keyword">new</span>&#xA0;<span class="sunlight-ident">Keyring</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;their&#xA0;pairs&#xA0;with&#xA0;account&#xA0;seeds.&#xA0;Add&#xA0;to&#xA0;keyring&#xA0;pair&#xA0;dictionary</span>
&#xA0;&#xA0;<span class="sunlight-ident">keyring</span><span class="sunlight-operator">.</span><span class="sunlight-ident">addFromSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">ALICE_SEED</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">keyring</span><span class="sunlight-operator">.</span><span class="sunlight-ident">addFromSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">BOB_SEED</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Note&#xA0;that&#xA0;we&#xA0;did&#xA0;not&#xA0;use&#xA0;`addFromAddress`&#xA0;since&#xA0;it&#xA0;does&#xA0;not&#xA0;add&#xA0;the</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;secret&#xA0;key&#xA0;to&#xA0;memory&#xA0;so&#xA0;we&#xA0;cannot&#xA0;later&#xA0;retrieve&#xA0;it&#xA0;with&#xA0;`getPairs`</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Retrieve&#xA0;all&#xA0;keyring&#xA0;pairs&#xA0;from&#xA0;the&#xA0;keyring&#xA0;pair&#xA0;dictionary</span>
&#xA0;&#xA0;<span class="sunlight-ident">keyring</span>
&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-operator">.</span><span class="sunlight-ident">getPairs</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>
&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-operator">.</span><span class="sunlight-ident">forEach</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">pair</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">index</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">address</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">pair</span><span class="sunlight-operator">.</span><span class="sunlight-ident">address</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">\</span><span class="sunlight-ident">nAccount</span>&#xA0;<span class="sunlight-keyword">with</span>&#xA0;<span class="sunlight-ident">index</span>&#xA0;<span class="sunlight-punctuation">#</span><span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">index</span><span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-ident">has</span>&#xA0;<span class="sunlight-ident">json</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">,</span>
&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-globalObject">JSON</span><span class="sunlight-operator">.</span><span class="sunlight-ident">stringify</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">keyring</span><span class="sunlight-operator">.</span><span class="sunlight-ident">toJson</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">address</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-keyword">null</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">2</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;&#xA0;&#xA0;<span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-punctuation">}</span>
<span class="sunlight-ident">main</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">catch</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">error</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">finally</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">_</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-ident">process</span><span class="sunlight-operator">.</span><span class="sunlight-ident">exit</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
</span></pre></div></div></code></pre>
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<h1 id="encrypt--decrypt-message-using-nacl">Encrypt &amp; Decrypt Message using NaCl</h1>
<p>The following example shows how to encrypt and decrypt a message with NaCl (pronouced &quot;salt&quot;), which is a Networking and Cryptography library used in util-crypto.</p>
<pre><code class="lang-javascript"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">naclEncrypt</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">naclDecrypt</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util-crypto&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-ident">async</span>&#xA0;<span class="sunlight-keyword">function</span>&#xA0;<span class="sunlight-named-ident">main</span>&#xA0;<span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">secret</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-keyword">new</span>&#xA0;<span class="sunlight-ident">Uint8Array</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">messagePreEncryption</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-keyword">new</span>&#xA0;<span class="sunlight-ident">Uint8Array</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">[</span><span class="sunlight-number">1</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">2</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">3</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">4</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">5</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">4</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">3</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">2</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">1</span><span class="sunlight-punctuation">]</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">noncePreEncryption</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-keyword">new</span>&#xA0;<span class="sunlight-ident">Uint8Array</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">24</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Encrypt&#xA0;the&#xA0;message</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">nonce</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclEncrypt</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">messagePreEncryption</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">secret</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">noncePreEncryption</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Show&#xA0;contents&#xA0;of&#xA0;the&#xA0;encrypted&#xA0;message</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Encrypted</span>&#xA0;<span class="sunlight-ident">message</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-globalObject">JSON</span><span class="sunlight-operator">.</span><span class="sunlight-ident">stringify</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-keyword">null</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-number">2</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Decrypt&#xA0;the&#xA0;message</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">messageDecrypted</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclDecrypt</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">nonce</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">secret</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Convert&#xA0;each&#xA0;Uint8Array&#xA0;to&#xA0;a&#xA0;string&#xA0;for&#xA0;comparison</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">isMatch</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">messagePreEncryption</span><span class="sunlight-operator">.</span><span class="sunlight-ident">toString</span>&#xA0;<span class="sunlight-operator">===</span>&#xA0;<span class="sunlight-ident">messageDecrypted</span><span class="sunlight-operator">.</span><span class="sunlight-ident">toString</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Verify&#xA0;that&#xA0;the&#xA0;decrypted&#xA0;message&#xA0;matches&#xA0;the&#xA0;original&#xA0;message</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Does</span>&#xA0;<span class="sunlight-ident">the</span>&#xA0;<span class="sunlight-ident">decrypted</span>&#xA0;<span class="sunlight-ident">message</span>&#xA0;<span class="sunlight-ident">match</span>&#xA0;<span class="sunlight-ident">the</span>&#xA0;<span class="sunlight-ident">original</span>&#xA0;<span class="sunlight-ident">message</span><span class="sunlight-operator">?</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">isMatch</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-punctuation">}</span>
<span class="sunlight-ident">main</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">catch</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">error</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">finally</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">_</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-ident">process</span><span class="sunlight-operator">.</span><span class="sunlight-ident">exit</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
</span></pre></div></div></code></pre>
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<h1 id="sign--verify-message-using-nacl">Sign &amp; Verify Message using NaCl</h1>
<p>The following example shows how to sign and verify a message with NaCl (pronouced &quot;salt&quot;), which is a Networking and Cryptography library used in util-crypto.</p>
<pre><code class="lang-javascript"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">u8aToHex</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">naclEncrypt</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">naclKeypairFromSeed</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">naclSign</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">naclVerify</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">randomAsU8a</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util-crypto&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-ident">async</span>&#xA0;<span class="sunlight-keyword">function</span>&#xA0;<span class="sunlight-named-ident">main</span>&#xA0;<span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;account&#xA0;seed&#xA0;for&#xA0;Alice&#xA0;as&#xA0;fallback&#xA0;if&#xA0;generated&#xA0;mnemonic&#xA0;not&#xA0;valid</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">seedAlice</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-string">&apos;Alice&apos;</span><span class="sunlight-operator">.</span><span class="sunlight-ident">padEnd</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-string">&apos;&#xA0;&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Generate&#xA0;new&#xA0;public/secret&#xA0;keypair&#xA0;for&#xA0;Alice&#xA0;from&#xA0;the&#xA0;supplied&#xA0;seed</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">secretKey</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">publicKey</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclKeypairFromSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">seedAlice</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Encrypt&#xA0;message.&#xA0;Create&#xA0;Uint8Array&apos;s&#xA0;filled&#xA0;with&#xA0;random&#xA0;bytes&#xA0;of&#xA0;specified&#xA0;length</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">secret</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">randomAsU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">32</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">messagePreEncryption</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">stringToU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;please&#xA0;send&#xA0;me&#xA0;DOTs&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">noncePreEncryption</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">randomAsU8a</span><span class="sunlight-punctuation">(</span><span class="sunlight-number">24</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">nonce</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclEncrypt</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">messagePreEncryption</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">secret</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">noncePreEncryption</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Sign&#xA0;the&#xA0;message&#xA0;with&#xA0;a&#xA0;valid&#xA0;signature</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">messageSignature</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclSign</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">secretKey</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Message</span>&#xA0;<span class="sunlight-ident">signature</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">u8aToHex</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">messageSignature</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Validate&#xA0;that&#xA0;the&#xA0;message&#xA0;was&#xA0;correctly&#xA0;signed</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">isValidSignature</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclVerify</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">encrypted</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">messageSignature</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">publicKey</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Was</span>&#xA0;<span class="sunlight-ident">the</span>&#xA0;<span class="sunlight-ident">message</span>&#xA0;<span class="sunlight-ident">correctly</span>&#xA0;<span class="sunlight-ident">signed</span><span class="sunlight-operator">?</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">isValidSignature</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-punctuation">}</span>
<span class="sunlight-ident">main</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">catch</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">error</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">finally</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">_</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-ident">process</span><span class="sunlight-operator">.</span><span class="sunlight-ident">exit</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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<h1 id="create--generate-mnemonic-using-bip39">Create &amp; Generate Mnemonic using BIP39</h1>
<p>The following example shows how to create and generate mnemonics using BIP39.</p>
<pre><code class="lang-javascript"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-javascript sunlight-highlighted"><span class="sunlight-javascript"><span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">mnemonicGenerate</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">mnemonicToSeed</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">mnemonicValidate</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">naclKeypairFromSeed</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">require</span><span class="sunlight-punctuation">(</span><span class="sunlight-string">&apos;@polkadot/util-crypto&apos;</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
<span class="sunlight-ident">async</span>&#xA0;<span class="sunlight-keyword">function</span>&#xA0;<span class="sunlight-named-ident">main</span>&#xA0;<span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span>&#xA0;<span class="sunlight-punctuation">{</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;mnemonic&#xA0;string&#xA0;for&#xA0;Alice&#xA0;using&#xA0;BIP39</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">mnemonicAlice</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">mnemonicGenerate</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">Generated</span>&#xA0;<span class="sunlight-ident">mnemonic</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">mnemonicAlice</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Validate&#xA0;the&#xA0;mnemic&#xA0;string&#xA0;that&#xA0;was&#xA0;generated</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">isValidMnemonic</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">mnemonicValidate</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">mnemonicAlice</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">log</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">`</span><span class="sunlight-ident">isValidMnemonic</span><span class="sunlight-operator">:</span>&#xA0;<span class="sunlight-ident">$</span><span class="sunlight-punctuation">{</span><span class="sunlight-ident">isValidMnemonic</span><span class="sunlight-punctuation">}</span><span class="sunlight-punctuation">`</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Create&#xA0;valid&#xA0;seed&#xA0;from&#xA0;mnemonic&#xA0;as&#xA0;u8a&#xA0;and&#xA0;convert&#xA0;it&#xA0;to&#xA0;a&#xA0;string</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;FIXME&#xA0;-&#xA0;Replace&#xA0;with&#xA0;mnemonicToSeed&#xA0;once&#xA0;exposed</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-ident">seedAlice</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">mnemonicToSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">mnemonicAlice</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Generate&#xA0;new&#xA0;public/secret&#xA0;keypair&#xA0;for&#xA0;Alice&#xA0;from&#xA0;the&#xA0;supplied&#xA0;seed</span>
&#xA0;&#xA0;<span class="sunlight-reservedWord">const</span>&#xA0;<span class="sunlight-punctuation">{</span>&#xA0;<span class="sunlight-ident">secretKey</span><span class="sunlight-punctuation">,</span>&#xA0;<span class="sunlight-ident">publicKey</span>&#xA0;<span class="sunlight-punctuation">}</span>&#xA0;<span class="sunlight-operator">=</span>&#xA0;<span class="sunlight-ident">naclKeypairFromSeed</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">seedAlice</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
&#xA0;&#xA0;<span class="sunlight-comment">//&#xA0;Encrypt,&#xA0;Sign&#xA0;and&#xA0;Validate&#xA0;the&#xA0;message.&#xA0;See&#xA0;Example&#xA0;&apos;Sign&#xA0;&amp;&#xA0;Verify&#xA0;Message&apos;</span>
<span class="sunlight-punctuation">}</span>
<span class="sunlight-ident">main</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">catch</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">console</span><span class="sunlight-operator">.</span><span class="sunlight-ident">error</span><span class="sunlight-punctuation">)</span><span class="sunlight-operator">.</span><span class="sunlight-keyword">finally</span><span class="sunlight-punctuation">(</span><span class="sunlight-ident">_</span>&#xA0;<span class="sunlight-operator">=</span><span class="sunlight-operator">&gt;</span>&#xA0;<span class="sunlight-ident">process</span><span class="sunlight-operator">.</span><span class="sunlight-ident">exit</span><span class="sunlight-punctuation">(</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">)</span><span class="sunlight-punctuation">;</span>
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<h1 id="util-crypto-examples">Util-Crypto Examples</h1>
<p>Here you will find a list of examples that takes you through the basics of encrypting and decrypting messages using NaCl, signing a message with a seed and verifying it using NaCl, and generating and validating mnemonics for account seeds.</p>
<h2 id="running-the-examples">Running the examples</h2>
<p>From within each folder run the following to install required dependencies and to execute the example:</p>
<pre><code class="lang-shell"><div class="sunlight-container sunlight-theme-gitbook"><div class="sunlight-code-container"><pre class="sunlight-highlight-shell sunlight-highlighted"><span class="sunlight-plaintext">yarn;
yarn&#xA0;start
</span></pre></div></div></code></pre>
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