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</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/bitcoin-s/bitcoin-s/blob/master/docs/wallet/wallet.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Wallet</h1></header><article><div><span><h2><a class="anchor" aria-hidden="true" id="bitcoin-s-wallet"></a><a href="#bitcoin-s-wallet" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Bitcoin-s wallet</h2>
<p>Bitcoin-s comes bundled with a rudimentary Bitcoin wallet. This wallet
is capable of managing private keys, generating addresses, constructing
and signing transactions, among other things. It is BIP32/BIP44/BIP49/BIP84
compatible.</p>
<p>This wallet is currently only released as a library, and not as a binary.
This is because it (nor the documentation) is not deemed production
ready. Use at your own risk, and without too much money depending on it.</p>
<h3><a class="anchor" aria-hidden="true" id="how-is-the-bitcoin-s-wallet-implemented"></a><a href="#how-is-the-bitcoin-s-wallet-implemented" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>How is the bitcoin-s wallet implemented</h3>
<p>The bitcoin-s wallet is a scalable way for individuals up to large bitcoin exchanges to safely and securely store their bitcoin in a scalable way.</p>
<p>All key interactions are delegated to the <a href="/docs/key-manager/key-manager">key-manager</a> which is a minimal dependency library to store and use key material.</p>
<p>By default, we store the encrypted root key in <code>$HOME/.bitcoin-s/seeds/encrypted-bitcoin-s-seed.json</code>. This is the seed that is used for each of the wallets on each bitcoin network.
Multiple wallet seeds can be saved using the <code>bitcoin-s.wallet.walletName</code> config option.
You can read more in the <a href="/docs/key-manager/server-key-manager">key manager docs</a>.</p>
<p>The wallet itself is used to manage the utxo life cycle, create transactions, and update wallet balances to show how much money you have the on a bitcoin network.</p>
<p>We use <a href="https://scala-slick.org/doc/3.3.1/">slick</a> as middleware to support different database types. Depending on your use case, you can use something as simple as sqlite, or something much more scalable like postgres.</p>
<h3><a class="anchor" aria-hidden="true" id="example"></a><a href="#example" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Example</h3>
<p>This guide shows how to create a Bitcoin-s wallet and then
peer it with a <code>bitcoind</code> instance that relays
information about what is happening on the blockchain
through the P2P network.</p>
<p>This is useful if you want more flexible signing procedures in
the JVM ecosystem and more granular control over your
UTXOs with popular database like Postgres, SQLite, etc.</p>
<p>This code snippet you have a running <code>bitcoind</code> instance, locally
on regtest.</p>
<pre><code class="hljs css language-scala">implicit val ec = scala.concurrent.ExecutionContext.global
implicit val system = ActorSystem("System")
val config = ConfigFactory.parseString {
"""
| bitcoin-s {
| network = regtest
| }
""".stripMargin
}
val datadir = Files.createTempDirectory("bitcoin-s-wallet")
implicit val walletConfig = WalletAppConfig(datadir, Vector(config))
// we also need to store chain state for syncing purposes
implicit val chainConfig = ChainAppConfig(datadir, Vector(config))
// when this future completes, we have
// created the necessary directories and
// databases for managing both chain state
// and wallet state
val configF: Future[Unit] = for {
_ &lt;- walletConfig.start()
_ &lt;- chainConfig.start()
} yield ()
val bitcoindInstance = BitcoindInstanceLocal.fromDatadir()
val bitcoind = BitcoindRpcClient(bitcoindInstance)
// when this future completes, we have
// synced our chain handler to our bitcoind
// peer
val syncF: Future[ChainApi] = configF.flatMap { _ =&gt;
val getBestBlockHashFunc = { () =&gt;
bitcoind.getBestBlockHash
}
val getBlockHeaderFunc = { hash: DoubleSha256DigestBE =&gt;
bitcoind.getBlockHeader(hash).map(_.blockHeader)
}
val blockHeaderDAO = BlockHeaderDAO()
val compactFilterHeaderDAO = CompactFilterHeaderDAO()
val compactFilterDAO = CompactFilterDAO()
val stateDAO = ChainStateDescriptorDAO()
val chainHandler = ChainHandler(
blockHeaderDAO,
compactFilterHeaderDAO,
compactFilterDAO,
stateDAO,
blockFilterCheckpoints = Map.empty)
ChainSync.sync(chainHandler, getBlockHeaderFunc, getBestBlockHashFunc)
}
// once this future completes, we have a initialized
// wallet
val wallet = Wallet(new NodeApi {
override def broadcastTransactions(txs: Vector[Transaction]): Future[Unit] = Future.successful(())
override def downloadBlocks(blockHashes: Vector[DoubleSha256Digest]): Future[Unit] = Future.successful(())
}, chainApi, ConstantFeeRateProvider(SatoshisPerVirtualByte.one))
val walletF: Future[WalletApi] = configF.flatMap { _ =&gt;
Wallet.initialize(wallet, None)
}
// when this future completes, ww have sent a transaction
// from bitcoind to the Bitcoin-S wallet
val transactionF: Future[(Transaction, Option[DoubleSha256DigestBE])] = for {
wallet &lt;- walletF
address &lt;- wallet.getNewAddress()
txid &lt;- bitcoind.sendToAddress(address, 3.bitcoin)
transaction &lt;- bitcoind.getRawTransaction(txid)
} yield (transaction.hex, transaction.blockhash)
// when this future completes, we have processed
// the transaction from bitcoind, and we have
// queried our balance for the current balance
val balanceF: Future[CurrencyUnit] = for {
wallet &lt;- walletF
(tx, blockhash) &lt;- transactionF
_ &lt;- wallet.processTransaction(tx, blockhash)
balance &lt;- wallet.getBalance()
} yield balance
balanceF.foreach { balance =&gt;
println(s"Bitcoin-S wallet balance: $balance")
}
</code></pre>
</span></div></article></div><div class="docLastUpdate"><em>Last updated on 2/11/2021 by Chris Stewart</em></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/node/node-api"><span class="arrow-prev"></span><span>Previous</span></a><a class="docs-next button" href="/docs/wallet/wallet-callbacks"><span>Wallet Callbacks</span><span class="arrow-next"></span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#bitcoin-s-wallet">Bitcoin-s wallet</a><ul class="toc-headings"><li><a href="#how-is-the-bitcoin-s-wallet-implemented">How is the bitcoin-s wallet implemented</a></li><li><a href="#example">Example</a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/" class="nav-home"><img src="/img/favicon.ico" alt="bitcoin-s" width="66" height="58"/></a><div><h5>Docs</h5><a href="/docs/en/getting-started">Getting Started</a><a href="/docs/en/core/core-intro">Guides</a><a href="/api/org/bitcoins">API Reference</a></div><div><h5>Community</h5><a href="/en/users.html">User Showcase</a><a href="https://join.slack.com/t/suredbits/shared_invite/zt-eavycu0x-WQL7XOakzQo8tAy7jHHZUw" target="_blank" rel="noreferrer noopener">Slack</a><a href="https://gitter.im/bitcoin-s-core/">Gitter chat</a></div><div><h5>More</h5><a href="https://github.com/bitcoin-s/bitcoin-s">GitHub</a><a class="github-button" href="https://github.com/bitcoin-s/bitcoin-s" data-icon="octicon-star" data-count-href="/bitcoin-s/bitcoin-s-core/stargazers" data-show-count="true" data-count-aria-label="# stargazers on GitHub" aria-label="Star this project on GitHub">Star</a></div></section><section class="copyright">Copyright © 2023 Suredbits &amp; the bitcoin-s developers</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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