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Circle Programmable Wallets

Prizee LOTTERY integrates Circle Web3 Services (W3S) to deliver an enterprise-grade, non-custodial wallet experience directly to every participant and creator.

The Non-Custodial Advantage​

Traditional Web3 wallet onboarding introduces substantial user friction:

  • Seed Phrase Vulnerability: Losing a 12-to-24 word phrase results in permanent loss of funds; keeping phrases online exposes users to clipboard malware.
  • Gas Asset Confusion: Requiring separate volatile tokens (like ETH, SOL, or MATIC) just to pay pennies in network fees.
  • Complex Signature Prompts: Hard-to-read hex transaction prompts that lead to blind signing risks.

Circle Programmable Wallets eliminate these obstacles through Multi-Party Computation (MPC) and native stablecoin mechanics:

  1. Zero Seed Phrases: Private keys never exist as a whole in any single location. Cryptographic key shares are split securely between Circle's hardware enclaves and user-controlled client storage.
  2. Native USDC Gas Settlement: Transactions on Arc Network use USDC directly for network fees, eliminating the need to hold multiple cryptocurrency assets.
  3. Frictionless Social Onboarding: Users can sign in using Google, X/Twitter, Discord, or Email, instantly receiving an active non-custodial wallet ready to purchase tickets or claim prizes.

User Interaction Lifecycle​

The end-to-end flow for account onboarding, ticket participation, and reward reception:

sequenceDiagram
    autonumber
    actor User as Player / Creator
    participant Portal as Prizee Portal
    participant Circle as Circle MPC Vault
    participant Arc as Arc Network

    User->>Portal: Sign in with Social Auth / Web3
    Portal->>Circle: Initialize Non-Custodial MPC Wallet
    Circle-->>Portal: Wallet Initialized (User Retains Signing Key)
    Portal-->>User: Active Account Ready (Circle Address Generated)
    User->>Portal: Purchases Ticket or Claims Prize
    Portal->>Circle: Initiate Transaction Challenge (PIN / Biometric)
    User->>Circle: Authorize Challenge via Device Biometrics
    Circle->>Arc: Broadcast Signed Transaction to Blockchain
    Arc-->>User: Instant On-Chain Confirmation (< 1.2s)

Security Architecture (MPC)​

Circle Programmable Wallets employ a robust Threshold Signature Scheme (TSS):

  • Share A (Hardware Security Enclave): Maintained within Circle's validated hardware security modules (HSMs).
  • Share B (Client Device Secret): Encrypted and unlocked only when the user verifies their identity via their secure PIN or biometric prompt.
Complete Self-Custody

Neither Prizee LOTTERY nor Circle can unilaterally move, freeze, or access user funds. A valid transaction signature can only be constructed when the user explicitly authorizes the action.

Key Product Capabilities​

1. Embedded Wallet Drawer​

Users can access their entire portfolio directly in the top navigation bar:

  • Real-Time Balances: Multi-asset support showing USDC, EURC, and cirBTC holdings alongside total USD value.
  • Send & Receive: One-click address copying, QR code generation, and instant transfer tools.
  • Integrated Token Swap: Fast, low-slippage conversion between supported Arc Network testnet tokens.

2. Transaction Security & PIN Verification​

Sensitive actions—such as seeding a grand prize pool into escrow or transferring large token amounts—trigger interactive PIN and biometric verification to prevent unauthorized activity.

3. Transparent Blockchain Receipts​

Every transaction displays a direct link to the ArcScan Explorer, allowing users to verify their ticket hash and balance updates on the open blockchain ledger.