ethers.js/docs/v5/api/utils/hdnode/index.html

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<div class="breadcrumbs"><a href="/v5/">Documentation</a>&nbsp;&nbsp;&raquo;&nbsp;&nbsp;<a href="/v5/api/">API</a>&nbsp;&nbsp;&raquo;&nbsp;&nbsp;<a href="/v5/api/utils/">Utilities</a>&nbsp;&nbsp;&raquo;&nbsp;&nbsp;<span class="current">HD Wallet</span></div>
<a name="hdnodes"></a><a name="hdnodes"></a><h1 class="show-anchors"><div>HD Wallet<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#hdnodes"></a></div></div></h1><p>TODO: Explain <a href="https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki">BIP32</a> <a href="https://en.bitcoin.it/wiki/BIP_0039">BIP-39</a> and whatnot here...</p>
<a name="hdnodes--types"></a><h2 class="show-anchors"><div>Types<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#hdnodes--types"></a></div></div></h2>
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<a name="hdnodes--defaultpath"></a><a name="hdnodes--types--hdnodes--defaultpath"></a><h3 class="show-anchors"><div>Constants<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#hdnodes--defaultpath"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L67">source</a></div></div></h3>
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<div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">utils</span><span class="symbol">.</span><span class="method">defaultPath</span> <span class="arrow">&rArr;</span> <span class="returns">"m/44'/60'/0'/0/0"</span><div class="anchors"></div></div><div class="body"><p>The default path for Ethereum in an HD Wallet</p>
</div></div><a name="Mnemonic"></a><a name="hdnodes--types--Mnemonic"></a><h3 class="show-anchors"><div>Mnemonic<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#Mnemonic"></a></div></div></h3>
<div class="property show-anchors"><div class="signature"><span class="path">mnemonic</span><span class="symbol">.</span><span class="method">phrase</span> <span class="arrow">&rArr;</span> <span class="returns">string</span><div class="anchors"></div></div><div class="body"><p>The mnemonic phrase for this mnemonic. It is 12, 15, 18, 21 or 24 words long and separated by the whitespace specified by the <code class="inline">locale</code>.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">mnemonic</span><span class="symbol">.</span><span class="method">path</span> <span class="arrow">&rArr;</span> <span class="returns">string</span><div class="anchors"></div></div><div class="body"><p>The HD path for this mnemonic.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">mnemonic</span><span class="symbol">.</span><span class="method">locale</span> <span class="arrow">&rArr;</span> <span class="returns">string</span><div class="anchors"></div></div><div class="body"><p>The language of the wordlist this mnemonic is using.</p>
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</div></div><a name="HDNode"></a><a name="hdnodes--HDNode"></a><h2 class="show-anchors"><div>HDNode<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L75">source</a></div></div></h2>
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<a name="HDNode--creating"></a><a name="hdnodes--HDNode--HDNode--creating"></a><h3 class="show-anchors"><div>Creating Instances<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode--creating"></a></div></div></h3>
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<a name="HDNode-fromMnemonic"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">HDNode</span><span class="symbol">.</span><span class="method">fromMnemonic</span><span class="symbol">(</span> <span class="param">phrase</span> <span class="symbol">[</span> <span class="symbol">,</span> <span class="param">password</span> <span class="symbol">[</span> <span class="symbol">,</span> <span class="param">wordlist</span> <span class="symbol">]</span> <span class="symbol">]</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#HDNode">HDNode</a></span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode-fromMnemonic"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L263">source</a></div></div><div class="body"><p>Return the <a href="/v5/api/utils/hdnode/#HDNode">HDNode</a> for <i>phrase</i> with the optional <i>password</i> and <i>wordlist</i>.</p>
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</div></div><a name="HDNode-fromSeed"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">HDNode</span><span class="symbol">.</span><span class="method">fromSeed</span><span class="symbol">(</span> <span class="param">aBytesLike</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#HDNode">HDNode</a></span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode-fromSeed"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L278">source</a></div></div><div class="body"><p>Return the <a href="/v5/api/utils/hdnode/#HDNode">HDNode</a> for the seed <i>aBytesLike</i>.</p>
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</div></div><a name="HDNode-fromExtendedKey"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">HDNode</span><span class="symbol">.</span><span class="method">fromExtendedKey</span><span class="symbol">(</span> <span class="param">extendedKey</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#HDNode">HDNode</a></span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode-fromExtendedKey"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L282">source</a></div></div><div class="body"><p>Return the <a href="/v5/api/utils/hdnode/#HDNode">HDNode</a> for the <i>extendedKey</i>. If <i>extendedKey</i> was neutered, the <b>HDNode</b> will only be able to compute addresses and not private keys.</p>
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</div></div><a name="HDNode--properties"></a><a name="hdnodes--HDNode--HDNode--properties"></a><h3 class="show-anchors"><div>Properties<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode--properties"></a></div></div></h3>
<div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">privateKey</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 32 &gt; &gt;</span><div class="anchors"></div></div><div class="body"><p>The private key for this HDNode.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">publicKey</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 33 &gt; &gt;</span><div class="anchors"></div></div><div class="body"><p>The (compresses) public key for this HDNode.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">fingerprint</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 4 &gt; &gt;</span><div class="anchors"></div></div><div class="body"><p>The fingerprint is meant as an index to quickly match parent and children nodes together, however collisions may occur and software should verify matching nodes.</p>
<p>Most developers will not need to use this.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">parentFingerprint</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 4 &gt; &gt;</span><div class="anchors"></div></div><div class="body"><p>The fingerprint of the parent node. See <i>fingerprint</i> for more details.</p>
<p>Most developers will not need to use this.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">address</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/address/#address">Address</a> &gt;</span><div class="anchors"></div></div><div class="body"><p>The address of this HDNode.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">mnemonic</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#Mnemonic">Mnemonic</a></span><div class="anchors"></div></div><div class="body"><p>The mnemonic of this HDNode, if known.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">path</span> <span class="arrow">&rArr;</span> <span class="returns">string</span><div class="anchors"></div></div><div class="body"><p>The path of this HDNode, if known. If the <i>mnemonic</i> is also known, this will match <code class="inline">mnemonic.path</code>.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">chainCode</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 32 &gt; &gt;</span><div class="anchors"></div></div><div class="body"><p>The chain code is used as a non-secret private key which is then used with EC-multiply to provide the ability to derive addresses without the private key of child non-hardened nodes.</p>
<p>Most developers will not need to use this.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">index</span> <span class="arrow">&rArr;</span> <span class="returns">number</span><div class="anchors"></div></div><div class="body"><p>The index of this HDNode. This will match the last component of the <i>path</i>.</p>
<p>Most developers will not need to use this.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">depth</span> <span class="arrow">&rArr;</span> <span class="returns">number</span><div class="anchors"></div></div><div class="body"><p>The depth of this HDNode. This will match the number of components (less one, the <code class="inline">m/</code>) of the <i>path</i>.</p>
<p>Most developers will not need to use this.</p>
</div></div><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">extendedKey</span> <span class="arrow">&rArr;</span> <span class="returns">string</span><div class="anchors"></div></div><div class="body"><p>A serialized string representation of this HDNode. Not all properties are included in the serialization, such as the mnemonic and path, so serializing and deserializing (using the <code class="inline">fromExtendedKey</code> class method) will result in reduced information.</p>
</div></div><a name="HDNode--methods"></a><a name="hdnodes--HDNode--HDNode--methods"></a><h3 class="show-anchors"><div>Methods<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode--methods"></a></div></div></h3>
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<a name="HDNode-neuter"></a><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">neuter</span><span class="symbol">(</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#HDNode">HDNode</a></span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode-neuter"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L162">source</a></div></div><div class="body"><p>Return a new instance of <i>hdNode</i> with its private key removed but all other properties preserved. This ensures that the key can not leak the private key of itself or any derived children, but may still be used to compute the addresses of itself and any non-hardened children.</p>
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</div></div><a name="HDNode-derivePath"></a><div class="property show-anchors"><div class="signature"><span class="path">hdNode</span><span class="symbol">.</span><span class="method">derivePath</span><span class="symbol">(</span> <span class="param">path</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns"><a href="/v5/api/utils/hdnode/#HDNode">HDNode</a></span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode-derivePath"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L225">source</a></div></div><div class="body"><p>Return a new <a href="/v5/api/utils/hdnode/#HDNode">HDNode</a> which is the child of <i>hdNode</i> found by deriving <i>path</i>.</p>
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</div></div><a name="HDNode--utilities"></a><a name="hdnodes--HDNode--utilities"></a><h2 class="show-anchors"><div>Other Functions<div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#HDNode--utilities"></a></div></div></h2>
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<a name="utils-mnemonicToSeed"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">utils</span><span class="symbol">.</span><span class="method">mnemonicToSeed</span><span class="symbol">(</span> <span class="param">phrase</span> <span class="symbol">[</span> <span class="symbol">,</span> <span class="param">password</span> <span class="symbol">]</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a>&lt; 64 &gt; &gt;</span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#utils-mnemonicToSeed"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L310">source</a></div></div><div class="body"><p>Convert a mnemonic phrase to a seed, according to <a href="https://en.bitcoin.it/wiki/BIP_0039">BIP-39</a>.</p>
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</div></div><a name="utils-mnemonicToEntropy"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">utils</span><span class="symbol">.</span><span class="method">mnemonicToEntropy</span><span class="symbol">(</span> <span class="param">phrase</span> <span class="symbol">[</span> <span class="symbol">,</span> <span class="param">wordlist</span> <span class="symbol">]</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns">string&lt; <a href="/v5/api/utils/bytes/#DataHexString">DataHexString</a> &gt;</span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#utils-mnemonicToEntropy"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L318">source</a></div></div><div class="body"><p>Convert a mnemonic phrase to its entropy, according to <a href="https://en.bitcoin.it/wiki/BIP_0039">BIP-39</a>.</p>
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</div></div><a name="utils-isValidMnemonic"></a><div class="property show-anchors"><div class="signature"><span class="path">ethers</span><span class="symbol">.</span><span class="path">utils</span><span class="symbol">.</span><span class="method">isValidMnemonic</span><span class="symbol">(</span> <span class="param">phrase</span> <span class="symbol">[</span> <span class="symbol">,</span> <span class="param">wordlist</span> <span class="symbol">]</span> <span class="symbol">)</span> <span class="arrow">&rArr;</span> <span class="returns">boolean</span><div class="anchors"><a class="self" href="/v5/api/utils/hdnode/#utils-isValidMnemonic"></a><a class="source" href="https://github.com/ethers-io/ethers.js/blob/master/packages/hdnode/src.ts/index.ts#L399">source</a></div></div><div class="body"><p>Returns true if <i>phrase</i> is a valid mnemonic phrase, by testing the checksum.</p>
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