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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Wallet · bitcoin-s</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="## Bitcoin-s wallet"/><meta name="docsearch:version" content="1.9.7"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Wallet · bitcoin-s"/><meta property="og:type" content="website"/><meta property="og:url" content="https://bitcoin-s.org/"/><meta property="og:description" content="## Bitcoin-s wallet"/><meta property="og:image" content="https://bitcoin-s.org/img/undraw_online.svg"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://bitcoin-s.org/img/undraw_tweetstorm.svg"/><link rel="shortcut icon" href="/img/favicon.ico"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script>
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Core</a></li><li class="navListItem"><a class="navItem" href="/docs/rpc/lnd-rpc">LND</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Secp256k1</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/secp256k1/secp256k1">Secp256k1</a></li><li class="navListItem"><a class="navItem" href="/docs/secp256k1/jni-modify">Adding to Secp256k1 JNI</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Testkit</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/testkit/testkit">Testkit</a></li><li class="navListItem"><a class="navItem" href="/docs/testkit/testkit-core">Testkit Core</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">DLC Oracle</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/oracle/build-oracle-server">Building the Oracle Server</a></li><li class="navListItem"><a class="navItem" href="/docs/oracle/oracle-server">Oracle Server</a></li><li 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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>
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<p>Bitcoin-s comes bundled with a rudimentary Bitcoin wallet. This wallet
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is capable of managing private keys, generating addresses, constructing
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and signing transactions, among other things. It is BIP32/BIP44/BIP49/BIP84
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compatible.</p>
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<p>This wallet is currently only released as a library, and not as a binary.
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This is because it (nor the documentation) is not deemed production
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ready. Use at your own risk, and without too much money depending on it.</p>
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<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>
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<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>
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<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>
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<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.
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Multiple wallet seeds can be saved using the <code>bitcoin-s.wallet.walletName</code> config option.
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You can read more in the <a href="/docs/key-manager/server-key-manager">key manager docs</a>.</p>
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<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>
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<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>
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<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>
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<p>This guide shows how to create a Bitcoin-s wallet and then
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peer it with a <code>bitcoind</code> instance that relays
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information about what is happening on the blockchain
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through the P2P network.</p>
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<p>This is useful if you want more flexible signing procedures in
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the JVM ecosystem and more granular control over your
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UTXOs with popular database like Postgres, SQLite, etc.</p>
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<p>This code snippet you have a running <code>bitcoind</code> instance, locally
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on regtest.</p>
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<pre><code class="hljs css language-scala">implicit val ec = scala.concurrent.ExecutionContext.global
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implicit val system = ActorSystem("System")
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val config = ConfigFactory.parseString {
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"""
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| bitcoin-s {
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| network = regtest
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| }
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""".stripMargin
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}
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val datadir = Files.createTempDirectory("bitcoin-s-wallet")
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implicit val walletConfig = WalletAppConfig(datadir, Vector(config))
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// we also need to store chain state for syncing purposes
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implicit val chainConfig = ChainAppConfig(datadir, Vector(config))
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// when this future completes, we have
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// created the necessary directories and
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// databases for managing both chain state
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// and wallet state
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val configF: Future[Unit] = for {
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_ <- walletConfig.start()
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_ <- chainConfig.start()
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} yield ()
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val bitcoindInstance = BitcoindInstanceLocal.fromDatadir()
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val bitcoind = BitcoindRpcClient(bitcoindInstance)
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// when this future completes, we have
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// synced our chain handler to our bitcoind
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// peer
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val syncF: Future[ChainApi] = configF.flatMap { _ =>
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val getBestBlockHashFunc = { () =>
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bitcoind.getBestBlockHash
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}
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val getBlockHeaderFunc = { hash: DoubleSha256DigestBE =>
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bitcoind.getBlockHeader(hash).map(_.blockHeader)
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}
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val blockHeaderDAO = BlockHeaderDAO()
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val compactFilterHeaderDAO = CompactFilterHeaderDAO()
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val compactFilterDAO = CompactFilterDAO()
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val stateDAO = ChainStateDescriptorDAO()
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val chainHandler = ChainHandler(
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blockHeaderDAO,
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compactFilterHeaderDAO,
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compactFilterDAO,
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stateDAO,
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blockFilterCheckpoints = Map.empty)
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ChainSync.sync(chainHandler, getBlockHeaderFunc, getBestBlockHashFunc)
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}
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// once this future completes, we have a initialized
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// wallet
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val wallet = Wallet(new NodeApi {
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override def broadcastTransactions(txs: Vector[Transaction]): Future[Unit] = Future.successful(())
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override def downloadBlocks(blockHashes: Vector[DoubleSha256Digest]): Future[Unit] = Future.successful(())
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}, chainApi, ConstantFeeRateProvider(SatoshisPerVirtualByte.one))
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val walletF: Future[WalletApi] = configF.flatMap { _ =>
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Wallet.initialize(wallet, None)
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}
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// when this future completes, ww have sent a transaction
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// from bitcoind to the Bitcoin-S wallet
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val transactionF: Future[(Transaction, Option[DoubleSha256DigestBE])] = for {
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wallet <- walletF
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address <- wallet.getNewAddress()
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txid <- bitcoind.sendToAddress(address, 3.bitcoin)
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transaction <- bitcoind.getRawTransaction(txid)
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} yield (transaction.hex, transaction.blockhash)
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// when this future completes, we have processed
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// the transaction from bitcoind, and we have
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// queried our balance for the current balance
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val balanceF: Future[CurrencyUnit] = for {
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wallet <- walletF
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(tx, blockhash) <- transactionF
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_ <- wallet.processTransaction(tx, blockhash)
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balance <- wallet.getBalance()
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} yield balance
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balanceF.foreach { balance =>
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println(s"Bitcoin-S wallet balance: $balance")
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}
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</code></pre>
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</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 & 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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