For Ecosystems
Custom Wallet
Build a fully custom Ecosystem Wallet using the Wallet Development Kit on top of Sequence infrastructure. Self-host critical components if needed.
The Wallet Development Kit (WDK) lets you build a custom Ecosystem Wallet while using Sequence infrastructure for identity, sessions, transactions, and data. You own the UI, routing, and product decisions, and you can self-host critical components where required.
- Package:
@0xsequence/wallet-wdk - Repo: sequence.js
What you build vs what we provide
| Area | You build | Sequence provides |
|---|---|---|
| UI/UX | Wallet screens, flows, routing, theming | Reference components and SDKs |
| Auth and sessions | Choose login UX, wire flows | Identity Instrument (session attestations), Smart Sessions model |
| Transactions | App-specific flows and UX | Transaction API for relaying and sponsorship |
| Data | Custom views and analytics | Indexer for balances, NFTs, events, prices |
| Node access | Optional custom providers | Blockchain RPC via Node Gateway |
| Backend | Optional business logic | Sidekick for secure server-side endpoints |
Available capabilities
- Smart Sessions and session attestations for scoped, low-friction execution.
- Passkeys and social logins with enclave-signed sessions.
- Cross-chain accounts with a single on-chain configuration root (signers, sessions, recovery).
- Timed recovery keys for private passphrase support with time-based recovery.
- Developer integrations: Web, React Native, Unity, and Unreal via existing SDKs.
- Services: Indexer for reads, Transaction API for writes, Node Gateway RPC for raw calls.
High-level integration flow
1
Install and plan hosting
Add the package:
pnpm add @0xsequence/wallet-wdk. Decide which components you will self-host (e.g., UI, Identity Instrument) versus use hosted.2
Configure ecosystem metadata
Set the wallet domain, supported chains, branding, and session policies. Use Builder for environment, keys, and policy management.
3
Wire identity and sessions
Use the Identity Instrument for session attestations. Implement the login and session callback flow, and store session keys securely.
4
Connect services
Read with Indexer, write with Transaction API, and access nodes with Blockchain RPC.
5
Test and ship
Validate Smart Session scopes, recovery paths, and cross-chain actions. Roll out on your domain.
Notes on self-hosting
- Identity Instrument can be self-hosted in your own AWS Nitro Enclave environment if your compliance model requires it.
- You can run your own Sidekick for controlled server-side writes and key custody.
- Contracts, audits, and deployments are documented in Technical References.
Next steps
- Explore the repo: sequence.js.
- Share For Developers with app teams integrating into your ecosystem.
- Review Smart Sessions and For Ecosystems.
- Get in touch with us to get started: Contact Us.