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FAQ
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<div id="app"><div class="vocs_DocsLayout" data-layout="docs"><a class="vocs_SkipLink vocs_utils_visuallyHidden" href="/FAQ#vocs-content">Skip to content</a><div class="vocs_DocsLayout_gutterLeft"><aside class="vocs_Sidebar vocs_DocsLayout_sidebar"><div class="vocs_Sidebar_logoWrapper"><div class="vocs_Sidebar_logo"><a style="align-items:center;display:flex;height:100%" href="/"><div class="vocs_NavLogo_title">Smart Wallet</div></a></div><div class="vocs_Sidebar_divider"></div></div><nav class="vocs_Sidebar_navigation"><div class="vocs_Sidebar_group"><section class="vocs_Sidebar_section"><div class="vocs_Sidebar_items"><a data-active="false" class="vocs_Sidebar_item" href="/why">Why Smart Wallet?</a><a data-active="false" class="vocs_Sidebar_item" href="/quick-start">Quick Start</a><a data-active="true" class="vocs_Sidebar_item" href="/FAQ">FAQ</a><a data-active="false" class="vocs_Sidebar_item" href="/checklist">Launch Ready Checklist</a><a data-active="false" class="vocs_Sidebar_item" href="/wallet-library-support">Wallet Library Support</a><a data-active="false" class="vocs_Sidebar_item" href="/base-gasless-campaign">Base Gasless Campaign</a></div></section><section class="vocs_Sidebar_section vocs_Sidebar_level"><div class="vocs_Sidebar_sectionHeader" role="button" tabindex="0"><div class="vocs_Sidebar_sectionTitle">Guides</div><div role="button" tabindex="0"><div aria-label="toggle section" class="vocs_Icon vocs_Sidebar_sectionCollapse" role="img" style="--vocs_Icon_size:10px"><svg width="100%" height="100%" viewBox="0 0 39 69" fill="none" xmlns="http://www.w3.org/2000/svg"><title>Chevron Right</title><path d="M38.8697 34.7461C38.8697 33.6719 38.4791 32.6953 37.649 31.8652L7.47318 1.8848C6.74078 1.1035 5.76418 0.712891 4.64118 0.712891C2.34618 0.712891 0.588379 2.42189 0.588379 4.71679C0.588379 5.79099 1.07668 6.81639 1.76028 7.59769L29.0552 34.7461L1.76028 61.8945C1.07668 62.6758 0.588379 63.6523 0.588379 64.7754C0.588379 67.0703 2.34618 68.7793 4.64118 68.7793C5.76418 68.7793 6.74078 68.3887 7.47318 67.6074L37.649 37.627C38.4791 36.7969 38.8697 35.8203 38.8697 34.7461Z" fill="currentColor"></path></svg></div></div></div><div class="vocs_Sidebar_items"><section class="vocs_Sidebar_section"><div class="vocs_Sidebar_sectionHeader"><div class="vocs_Sidebar_item">Create a New App</div></div><div class="vocs_Sidebar_items vocs_Sidebar_levelInset"><a data-active="false" class="vocs_Sidebar_item" href="/guides/create-app/using-boat">Using Build Onchain Template</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/create-app/using-wagmi">Using Wagmi Template</a></div></section><a data-active="false" class="vocs_Sidebar_item" href="/guides/update-existing-app">Update an Existing App</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/components/create-wallet-button">Create Wallet Button</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/signature-verification">Signature Verification</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/siwe">Sign-In with Ethereum</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/batch-transactions">Batch Transactions</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/paymasters">Paymasters (Sponsored Transactions)</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/magic-spend">Magic Spend Support</a><section class="vocs_Sidebar_section"><div class="vocs_Sidebar_sectionHeader"><div class="vocs_Sidebar_item">Tips & Tricks</div></div><div class="vocs_Sidebar_items vocs_Sidebar_levelInset"><a data-active="false" class="vocs_Sidebar_item" href="/guides/tips/inspect-txn-simulation">Inspect Transaction Simulation</a><a data-active="false" class="vocs_Sidebar_item" href="/guides/tips/popup-tips">Popup Tips</a></div></section></div></section><section class="vocs_Sidebar_section vocs_Sidebar_level"><div class="vocs_Sidebar_sectionHeader" role="button" tabindex="0"><div class="vocs_Sidebar_sectionTitle">SDK</div><div role="button" tabindex="0"><div aria-label="toggle section" class="vocs_Icon vocs_Sidebar_sectionCollapse" role="img" style="--vocs_Icon_size:10px"><svg width="100%" height="100%" viewBox="0 0 39 69" fill="none" xmlns="http://www.w3.org/2000/svg"><title>Chevron Right</title><path d="M38.8697 34.7461C38.8697 33.6719 38.4791 32.6953 37.649 31.8652L7.47318 1.8848C6.74078 1.1035 5.76418 0.712891 4.64118 0.712891C2.34618 0.712891 0.588379 2.42189 0.588379 4.71679C0.588379 5.79099 1.07668 6.81639 1.76028 7.59769L29.0552 34.7461L1.76028 61.8945C1.07668 62.6758 0.588379 63.6523 0.588379 64.7754C0.588379 67.0703 2.34618 68.7793 4.64118 68.7793C5.76418 68.7793 6.74078 68.3887 7.47318 67.6074L37.649 37.627C38.4791 36.7969 38.8697 35.8203 38.8697 34.7461Z" fill="currentColor"></path></svg></div></div></div><div class="vocs_Sidebar_items"><a data-active="false" class="vocs_Sidebar_item" href="/sdk/install">Install</a><a data-active="false" class="vocs_Sidebar_item" href="/sdk/setup">Setup</a><a data-active="false" class="vocs_Sidebar_item" href="/sdk/makeWeb3Provider">makeWeb3Provider</a><a data-active="false" class="vocs_Sidebar_item" href="/sdk/v3-to-v4-changes">Upgrading from 3.x</a></div></section><section class="vocs_Sidebar_section vocs_Sidebar_level"><div class="vocs_Sidebar_sectionHeader" role="button" tabindex="0"><div class="vocs_Sidebar_sectionTitle">Smart Contracts</div><div role="button" tabindex="0"><div aria-label="toggle section" class="vocs_Icon vocs_Sidebar_sectionCollapse" role="img" style="--vocs_Icon_size:10px"><svg width="100%" height="100%" viewBox="0 0 39 69" fill="none" xmlns="http://www.w3.org/2000/svg"><title>Chevron Right</title><path d="M38.8697 34.7461C38.8697 33.6719 38.4791 32.6953 37.649 31.8652L7.47318 1.8848C6.74078 1.1035 5.76418 0.712891 4.64118 0.712891C2.34618 0.712891 0.588379 2.42189 0.588379 4.71679C0.588379 5.79099 1.07668 6.81639 1.76028 7.59769L29.0552 34.7461L1.76028 61.8945C1.07668 62.6758 0.588379 63.6523 0.588379 64.7754C0.588379 67.0703 2.34618 68.7793 4.64118 68.7793C5.76418 68.7793 6.74078 68.3887 7.47318 67.6074L37.649 37.627C38.4791 36.7969 38.8697 35.8203 38.8697 34.7461Z" fill="currentColor"></path></svg></div></div></div><div class="vocs_Sidebar_items"><a data-active="false" class="vocs_Sidebar_item" href="https://github.com/coinbase/smart-wallet">Smart Wallet</a><a data-active="false" class="vocs_Sidebar_item" href="https://github.com/coinbase/magic-spend">Magic Spend</a></div></section></div></nav></aside></div><div class="vocs_DocsLayout_gutterTop vocs_DocsLayout_gutterTop_offsetLeftGutter"><div class="vocs_DesktopTopNav"><button class="vocs_DesktopSearch_search" type="button" aria-haspopup="dialog" aria-expanded="false" aria-controls="radix-:Rlj:" data-state="closed"><svg width="15" height="15" viewBox="0 0 15 15" fill="none" xmlns="http://www.w3.org/2000/svg" style="margin-top:2px"><path d="M10 6.5C10 8.433 8.433 10 6.5 10C4.567 10 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href="https://github.com/coinbase/coinbase-wallet-sdk" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)" data-active="false" variant="styleless" data-radix-collection-item="">Github</a><a class="vocs_NavigationMenu_link vocs_Link vocs_Link_styleless vocs_ExternalLink" href="https://discord.com/invite/cdp/" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)" data-active="false" variant="styleless" data-radix-collection-item="">Discord</a></ul></div></nav><div class="vocs_MobileTopNav_navigation vocs_MobileTopNav_navigation_compact"><a class="vocs_MobileTopNav_navigationItem vocs_Link vocs_Link_styleless vocs_ExternalLink" href="https://smart-wallet.xyz/" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)" variant="styleless">Demo</a></div></div></div><div class="vocs_MobileTopNav_section"><div 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38.8697 34.7461Z" fill="currentColor"></path></svg></div></button></div></div></div></div><div class="vocs_DocsLayout_gutterRight vocs_DocsLayout_gutterRight_withSidebar"></div><div id="vocs-content" class="vocs_DocsLayout_content vocs_DocsLayout_content_withSidebar vocs_DocsLayout_content_withTopNav"><article class="vocs_Content"><h2 class="vocs_H2 vocs_Heading"><div id="when-will-smart-wallet-be-publicly-available-on-mainnets" class="vocs_Heading_slugTarget"></div>When will Smart Wallet be publicly available on mainnets?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#when-will-smart-wallet-be-publicly-available-on-mainnets"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">By early June.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="what-networks-will-be-supported-at-launch" class="vocs_Heading_slugTarget"></div>What networks will be supported at launch?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#what-networks-will-be-supported-at-launch"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<ul class="vocs_List vocs_List_unordered">
<li class="vocs_ListItem">Base</li>
<li class="vocs_ListItem">Arbitrum</li>
<li class="vocs_ListItem">Optimism</li>
<li class="vocs_ListItem">Zora</li>
<li class="vocs_ListItem">Polygon</li>
<li class="vocs_ListItem">BNB</li>
<li class="vocs_ListItem">Avalanche</li>
<li class="vocs_ListItem">ETH mainnet (not preferred for use, due to gas cost)</li>
</ul>
<h2 class="vocs_H2 vocs_Heading"><div id="how-does-smart-wallet-work-with-coinbase-wallet-mobile-app-and-extension" class="vocs_Heading_slugTarget"></div>How does Smart Wallet work with Coinbase Wallet mobile app and extension?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#how-does-smart-wallet-work-with-coinbase-wallet-mobile-app-and-extension"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">At launch, Smart Wallet is separate from wallet mobile and extension. Users sign on <a class="vocs_Anchor vocs_Link vocs_Link_accent_underlined vocs_ExternalLink" href="https://keys.coinbase.com/" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)">keys.coinbase.com</a>
and can view and manage assets at <a class="vocs_Anchor vocs_Link vocs_Link_accent_underlined vocs_ExternalLink" href="https://homebase.coinbase.com/" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)">homebase.coinbase.com</a>.</p>
<p class="vocs_Paragraph">See <a class="vocs_Anchor vocs_Link vocs_Link_accent_underlined" href="/sdk/makeWeb3Provider#parameters">makeWeb3Provider</a> documentation for nuances based on different configurations.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="will-users-have-the-same-address-across-chains" class="vocs_Heading_slugTarget"></div>Will users have the same address across chains?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#will-users-have-the-same-address-across-chains"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Yes, a user's Smart Wallet address will be the same across all the chains we support.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="how-much-does-it-cost" class="vocs_Heading_slugTarget"></div>How much does it cost?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#how-much-does-it-cost"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Smart Wallet is free to use for both developers and users.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="is-smart-wallet-more-expensive-to-use" class="vocs_Heading_slugTarget"></div>Is Smart Wallet more expensive to use?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#is-smart-wallet-more-expensive-to-use"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Smart contract wallets use more gas per transaction than EOA wallets. This means they should be avoided on networks like Ethereum mainnet,
but elsewhere the cost difference is negligible.</p>
<p class="vocs_Paragraph">For example, some current transaction costs on Base using Smart Wallet</p>
<ul class="vocs_List vocs_List_unordered">
<li class="vocs_ListItem">ETH transfer: $0.03</li>
<li class="vocs_ListItem">ERC-20 transfer: $0.06</li>
</ul>
<h2 class="vocs_H2 vocs_Heading"><div id="whos-holding-the-keys" class="vocs_Heading_slugTarget"></div>Who's holding the keys?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#whos-holding-the-keys"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Smart wallets are secured by passkeys stored on the user's device.
Passkeys are backed up with passkey providers such as Apple, Chrome, or 1Password,
or on hardware such as YubiKeys.
Passkey signatures are validated directly onchain via an <a class="vocs_Anchor vocs_Link vocs_Link_accent_underlined vocs_ExternalLink" href="https://github.com/base-org/webauthn-sol" target="_blank" rel="noopener noreferrer" style="--vocs_ExternalLink_iconUrl:url(/.vocs/icons/arrow-diagonal.svg)">open source and audited smart contract</a>.
Coinbase never holds keys and never has access to user funds.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="what-is-a-passkey" class="vocs_Heading_slugTarget"></div>What is a passkey?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#what-is-a-passkey"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Passkeys are alternatives to passwords or other encrypted methods like recovery phrases, that are extremely easy to create and highly secure.</p>
<p class="vocs_Paragraph">They are end-to-end encrypted and linked to your Google or iCloud account, Chrome profile, or hardware device such as a YubiKey.</p>
<p class="vocs_Paragraph">This means users no longer have to deal with passwords or recovery phrases. Instead they can use common methods of authorization like touch or faceID, and be more resistant to phishing attempts.</p>
<h2 class="vocs_H2 vocs_Heading"><div id="what-happens-if-user-lose-their-passkey" class="vocs_Heading_slugTarget"></div>What happens if user lose their passkey?<a class="vocs_Anchor vocs_Autolink" aria-hidden="true" tabindex="-1" href="/FAQ#what-happens-if-user-lose-their-passkey"><div data-autolink-icon="true" class="vocs_Div vocs_AutolinkIcon" style="--vocs_AutolinkIcon_iconUrl:url(/.vocs/icons/link.svg)"></div></a></h2>
<p class="vocs_Paragraph">Every Smart Wallet supports multiple owners, and our client encourages users to add a backup recovery key, for the unlikely case they lose their passkey.</p></article><footer class="vocs_Footer"><div class="vocs_Footer_container"></div></footer></div><div data-bottom-observer="true"></div></div></div>
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