Overview

CapSign wallets are smart contract wallets (ERC-4337) that use biometric authentication instead of seed phrases.

What is a Smart Wallet?

A smart wallet is a smart contract on the blockchain that acts as your account. Unlike traditional wallets (EOAs), smart wallets offer:

  • No seed phrases - Your wallet is controlled by Face ID / Touch ID

  • Account abstraction - Better UX with gasless transactions

  • Programmable - Support for multi-sig, spending limits, and recovery

  • Secure - Biometric authentication required for all actions

Key Features

Biometric Authentication

Your wallet is protected by your device's biometric authentication:

  • Face ID (iOS, Mac)

  • Touch ID (iOS, Mac)

  • Fingerprint (Android)

  • Windows Hello (Windows)

Every transaction requires biometric confirmation - no one can access your wallet without your biometrics.

Multi-Entity Support

Switch between multiple organizational contexts from a single account:

  • Personal Account - Your individual investment account

  • Corporate Accounts - Company investment accounts you're authorized for

  • Fund Accounts - Investment funds and SPVs you manage

  • Multiple Roles - GP in Fund A, LP in Fund B, employee of Corp C

Learn more: Multi-Entity Accounts

Account Abstraction (ERC-4337)

Your wallet uses ERC-4337 account abstraction:

  • Gas sponsorship - Platform can sponsor gas for certain operations

  • Batch transactions - Execute multiple actions in one transaction

  • Custom validation - Flexible signature schemes (passkeys, multi-sig)

  • UserOperations - Transactions submitted through bundlers

Security Features

  • Biometric-only access - No seed phrases to lose or steal

  • On-chain verification - All actions verified by smart contract

  • Replay protection - Signatures can't be reused

  • Domain separation - Signatures bound to specific contracts

Getting Started

Create Your Wallet

  1. Visit app.capsign.com

  2. Click "Sign Up"

  3. Authenticate with Face ID / Touch ID

  4. Your wallet is created instantly

Time required: 30 seconds

Learn more: Quickstart Guide

Your Wallet Address

Your wallet address is displayed in the top right of the app. It looks like:

0x1234...5678

This is your public identifier - safe to share with others.

Wallet Operations

Sending Transactions

All transactions require biometric authentication:

  1. Initiate action (send tokens, sign document, etc.)

  2. Review details in the confirmation dialog

  3. Authenticate with Face ID / Touch ID

  4. Transaction submitted to the network

Receiving Funds

To receive funds, share your wallet address with the sender.

Supported assets:

  • ETH (native)

  • ERC-20 tokens (USDC, etc.)

  • ERC-721 NFTs

  • ERC-1155 tokens

  • CapSign securities tokens

Transaction History

View your transaction history in the app:

  • Navigate to Wallet → History

  • See all incoming and outgoing transactions

  • Filter by token type

  • Export for tax purposes

Account Recovery

Passkey Recovery

Your passkey is stored in your device's secure enclave and synced via:

  • iCloud Keychain (Apple devices)

  • Google Password Manager (Android devices)

  • Windows Hello (Windows devices)

If you lose your device, you can recover access on a new device that's signed into the same account.

Social Recovery

Coming soon: Designate trusted contacts who can help you recover your wallet if you lose access to all your devices.

Multi-Entity Management

CapSign supports complex organizational structures through context switching:

Example use cases:

  • Fund manager with multiple SPVs

  • Employee with corporate investment account

  • LP in multiple funds

  • GP and LP in different funds

Learn more: Multi-Entity Accounts

Advanced Features

Delegation

Coming soon: Delegate transaction permissions to other wallets (e.g., allow an employee to sign documents on behalf of the company).

Multi-Signature

Coming soon: Require multiple signatures for certain operations (e.g., company treasury requires 2 of 3 executives).

Spending Limits

Coming soon: Set daily or per-transaction spending limits for added security.

Technical Details

Contract Architecture

CapSign wallets use the Diamond Pattern (EIP-2535):

  • Modular facets - Functionality split into separate contracts

  • Upgradeable - New features can be added without changing the wallet address

  • Gas efficient - Singleton pattern reduces deployment costs

Learn more: Wallet Architecture

Deployed Contracts

See Contract Addresses for wallet factory and facet addresses.

FAQs

Q: Can I use my own wallet (MetaMask, Coinbase Wallet)? A: Entity accounts can connect an EOA wallet as a signer. Individual accounts use CapSign smart wallets only.

Q: Where are my private keys? A: Your wallet is controlled by a passkey stored in your device's secure enclave. There are no traditional "private keys."

Q: What if I lose my device? A: Your passkey syncs via iCloud Keychain (Apple) or Google Password Manager (Android). Sign in on a new device to recover access.

Q: Can someone steal my wallet if they steal my device? A: No. Biometric authentication is required, and biometrics can't be extracted or replicated.

Q: What networks are supported? A: Base Mainnet and Base Sepolia testnet. See Supported Networks.

Need Help?

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