Connect wallet

PrediX offers 2 sign-in methods, you maintain full control of your assets while trading at the best market prices.

Tip

Both are non-custodial - nobody (including PrediX) holds your private key.

Choose connect method

	Passkey + Smart Account	Crypto Wallet (EOA)
Experience	Web2-like, biometric	Traditional web3, sign each tx
Browser extension	Not required	Required (MetaMask, Rainbow…)
Backup & recovery	Cloud sync (iCloud / Google), or a second device	BIP-39 seed phrase (12-24 words)
Hardware wallet	No (private key in Secure Enclave)	Yes (Ledger, Trezor)
Gas fees	Pay via paymaster (USDC)	Pay ETH directly (Unichain is cheap ~$0.001-0.01/tx)
Batch transactions	Yes (1-click [approve, swap] atomic)	No (2 separate txs)
First-time sign-up	~5 seconds biometric	Already have a wallet → instant
Best for	New users · fast onboarding	DeFi users · large custody · hardware wallets

_{Choose connect method: Passkey or Crypto Wallet - both non-custodial}

---

Method 1: Passkey + Smart Account

Passkeys use the WebAuthn standard - biometric (Touch ID, Face ID, Windows Hello) or your device PIN for authentication. The private key is generated and stored in the Secure Enclave / TPM and cannot be exported.

[Insert Video Here]

1. How to login?

1. Step 1: Access the Portal

   • Open your browser and navigate to beta.predixpro.io
   • Click the “Sign up” button to begin.

2. Step 2: Choose Authentication Method

   • From the available options, select “Continue with Passkey”.

3. Step 3: Biometric Verification

   • Your browser will trigger a system prompt for biometric authentication (such as FaceID, TouchID, or Windows Hello).
   • Confirm the prompt to verify your identity securely.

4. Step 4: Smart Account Generation

   • Your Smart account counterfactual address will appear immediately.

Caution

Note:

• Your account is officially deployed on-chain the moment you perform your first action.
• On sign-up, the app deploys a Kernel smart account (ERC-4337) - an on-chain wallet contract that validates via passkey signature. All actions go through UserOps.

2. Backup your account

Choose at least one backup method on sign-up:

iCloud Keychain

Apple-native passkey sync

Using the same Apple ID via iCloud Keychain.Passkeys automatically sync across:

• iPhone
• iPad
• Mac

Best for:

• Apple ecosystem users
• seamless multi-device login
• Face ID / Touch ID authentication

Google Password Manager

Cross-device passkey access

Allowing fast sign-in across desktop and mobile, Passkeys sync automatically across:

• Android devices
• Chrome browsers
• Google accounts

Best for:

• Android users
• Chrome-first workflows
• Multi-device convenience

Hardware Key

Physical security authentication

Authentication requires plugging in or tapping the hardware key, Passkeys are stored directly on:

• YubiKey
• Titan Key
• Other FIDO hardware devices

Best for:

• Maximum account security
• Cold authentication
• Advanced users & institutions

Danger

Single point of failure:

• If you only have 1 device + no cloud sync + no hardware key backup → Losing the device = losing the wallet. Enable cloud sync or add a second device immediately after sign-up.

3. Recovery - Lost Device

SCENARIO	WHAT TO DO?
Cloud sync enabled	✅ Sign in on a new device with the same Apple ID / Google account - Passkey restores automatically
Second device paired	✅ Use the second device to authenticate, then re-pair a new device
Hardware key backup	✅ Plug in the Hardware Key on any device to restore access
None of the above	❌ Wallet is unrecoverable

Note

Social recovery - TBA post-mainnet

• Designate N trusted guardians; any M-of-N can co-sign to restore access.

Method 2: Crypto Wallet (EOA)

Use your existing Web3 wallet - MetaMask, Rainbow, Coinbase Wallet, or any wallet that supports WalletConnect/Hardware Wallet.

1. How to connect Web3 wallet?

1. Step 1: Initiate Connection

   • Navigate to the app header and click the “Connect Wallet” button.

2. Step 2: Select Your Provider

   • Choose your preferred wallet from the list (e.g., MetaMask, Rainbow, WalletConnect, or Ledger).

3. Step 3: Approve the Request

   • Your wallet extension or app will trigger a pop-up.
   • Approve the connection request to link your wallet to the platform.

4. Step 4: Secure Sign-In (SIWE)

   • Sign the SIWE (Sign-In With Ethereum) message to verify ownership of your address.

   Note

   Note: This is an off-chain signature and incurs no gas cost.

2. When to use Web3 Wallet ?

• You already have a DeFi workflow with MetaMask + hardware wallet.
• Large custody balance - want standard BIP-39 seed phrase backup.
• Integration with other tooling (Frame, Rabby, Safe multisig).
• Prefer full control with no paymaster dependency.

---

SIWE Session

Both methods use SIWE (EIP-4361) to create authenticated backend sessions through wallet signatures.

The client requests a challenge, the user signs the EIP-4361 message, and the backend verifies the ECDSA signature before creating a secure HTTP Only session cookie valid for 7 days.

_{SIWE Authentication Flow}

Note

Additional Gas Fee:

• By default, both methods require users to pay their own gas. Please ensure you have sufficient funds, as each transaction requires gas fees paid in ETH on Unichain.
• PrediX has a sponsorship program for eligible users (new user onboarding, stakers above threshold, campaign-eligible events) - applies to both account types:

• Paymaster covers gas directly
• Off-chain rebate/refund (mechanism announced pre-launch)

→ Eligibility criteria and sponsorship duration may change via governance vote.