# 1.2 About the SyFu Wallet

> Note: This page is a usage guide. For important matters (reviews, restrictions, collateral, penalties, etc.), please refer to the Terms of Service. If there is any discrepancy, the Terms of Service will take precedence.

### Overview

The SyFu Wallet uses **MPC (Multi-Party Computation)** technology, so users do not need to manually manage private keys in the traditional way.

In the SyFu app, user wallets are operated as two separate wallets:

* **SyFu Wallet (Standard Wallet)**
* **Spending Wallet (Spending Wallet)**

Both are **non-custodial** and are operated based on user authentication (multiple factors, including passkeys).

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### How the MPC Wallet Works (Simple Explanation)

With the SyFu Wallet, key material is distributed and managed. You can use the wallet by passing **two or more** authentication factors.

#### Authentication Methods (Examples)

1. Email verification (your SyFu account email)
2. Phone number verification or an authenticator app
3. Passkey authentication (Face ID / fingerprint, etc.)

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### Wallet Structure and Roles

A pair of wallets is issued per user, consisting of the following two types:

| Wallet Type                       | Role                                               | Typical Use Cases                                          |
| --------------------------------- | -------------------------------------------------- | ---------------------------------------------------------- |
| SyFu Wallet (Standard Wallet)     | The base wallet for external transfers and custody | Holding NFTs/tokens, sending/receiving to external wallets |
| Spending Wallet (Spending Wallet) | The wallet used inside SyFu services               | In-app usage/spending, marketplace purchases, etc.         |

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### The Spending Wallet Is “Where You Use SyFu”

The Spending Wallet is designed to make **in-service usage (including games and the marketplace)** smooth.

* Most in-service actions (usage/spending, marketplace purchases, etc.) are executed **from the Spending Wallet**
* Therefore, when using SyFu services, the intended flow is **SyFu Wallet (Standard) → Spending** before use

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### Basic Flow (Important)

#### Use inside the app

**SyFu Wallet (Standard) → Spending → Use**

#### Move back to SyFu Wallet (Withdrawal)

**Spending → SyFu Wallet (Standard)**

Note: “Moving between Standard ⇄ Spending” and “Sending to an external wallet” are different actions.\
To send to an external wallet, perform a normal transfer **from the SyFu Wallet (Standard)**.

***

### EVT Balance Display (Two-Layer: On-chain / Credits)

In the Spending Wallet, EVT is shown as a **combined total** (the breakdown is always displayed).

* **EVT (On-chain):** EVT that exists on the blockchain (on-chain balance).
* **EVT Credits (In-app):** EVT credits shown as already granted/reflected in the app. After you submit a withdrawal request, they will be paid out as on-chain EVT.

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### Priority Order: Usage vs. Withdrawal

* **Usage (spending inside SyFu services):** EVT Credits (In-app) are used first.
* **Withdrawal (Withdraw EVT):** Your request is made using both On-chain / Credits, and **as a rule, On-chain is applied first**.

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### About EVT Withdrawal (Withdraw EVT)

Withdraw EVT means **moving EVT from the Spending Wallet to the SyFu Wallet (Standard)**.

For withdrawal rules (fee / minimum amount / waiting time), please refer to:\
<https://docs.syfu.io/quick-start/syfu-wallet/fees>

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### Scope of Withdrawal Rules (Important)

Withdrawal rules for **fees / minimum withdrawal amount / waiting time (Trust Rank)** apply **equally** to both:

* **EVT (On-chain)**
* **EVT Credits (In-app)**

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#### Important

* EVT withdrawals from the Spending Wallet may be placed **under review / on hold** for anti-fraud and security reasons.
* **EVT Credits (In-app)** may be **adjusted or canceled** (balance/payout) due to reviews, etc. (see Terms of Service for details).

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### Risks and Notes

* If you lose your authentication methods (email/SMS/passkey, etc.), you may be unable to restore or operate your wallet.
* Transfers may not be reversible if you enter the wrong destination address (always double-check before confirming).
* Beware of phishing links and fake support. We will never ask for your private key or seed phrase.

***

### About KYC (Identity Verification)

KYC is not required for normal usage, but we may request identity verification in the following cases:

| Case                    | Description                                                                    |
| ----------------------- | ------------------------------------------------------------------------------ |
| SyFu Card-related usage | KYC may be legally required for card issuance and/or usage                     |
| Fraud / risk detection  | Withdrawals or NFT transfers may be restricted and unlocked after verification |

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### Summary

* The SyFu app provides two wallets: **SyFu Wallet (Standard)** and **Spending Wallet**
* For in-service usage: **Standard → Spending → Use**
* In Spending, EVT is displayed as a **combined total** with a **constant breakdown** (On-chain / Credits)
* EVT withdrawal is moving EVT **Spending → Standard**
* Withdrawal rules apply equally to **On-chain / Credits**
* Both wallets are **non-custodial**