# How to Bridge Stablecoins

### Overview

This guide walks you through the process of bridging **USDC** and **USDT** stablecoins between the **Ethereum** network and the **QIE Mainnet** using our custom-built cross-chain bridge. Since QIE doesn't natively support stablecoins, we've enabled support through a **wrapped token mechanism**, maintaining a **1:1 peg** between the original and wrapped assets.

#### ✅ Supported Stablecoins

| Ethereum Token | QIE Representation |
| -------------- | ------------------ |
| USDC           | `wUSDC.eth`        |
| USDT           | `wUSDT.eth`        |

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### 🔁 Bridge Flow Overview

Our bridge operates by **locking** tokens on Ethereum and **minting wrapped equivalents** on QIE. On return, the wrapped tokens are **burned on QIE**, and the originals are **released** back on Ethereum.

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### 🔹 Bridging from Ethereum → QIE

#### Steps:

1. **Select Networks**
   * **From:** Ethereum
   * **To:** QIE Mainnet
2. **Choose Asset**
   * Select either **USDC** or **USDT** from the asset list.
3. **Initiate Transfer**
   * When the transfer is started:
     * Your **original tokens are locked** on the Ethereum network.
     * Simultaneously, an **equal amount of wrapped tokens** are **minted** on QIE:
       * `wUSDC.eth` for USDC
       * `wUSDT.eth` for USDT
4. **Receive on QIE Mainnet**
   * The wrapped tokens will be available in your wallet on QIE shortly after confirmation.

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### 🔸 Bridging from QIE → Ethereum

#### Steps:

1. **Select Networks**
   * **From:** QIE Mainnet
   * **To:** Ethereum
2. **Choose Asset**
   * Select either `wUSDC.eth` or `wUSDT.eth` depending on your holdings.
3. **Initiate Transfer**
   * When the transfer is started:
     * The **wrapped tokens are burned** on the QIE network.
     * The **original Ethereum-based tokens are unlocked** and returned to your Ethereum wallet.

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### 🧾 Token Contract Addresses on QIE

| Token        | Symbol      | QIE Contract Address                         |
| ------------ | ----------- | -------------------------------------------- |
| Wrapped USDC | `wUSDC.eth` | `0x0e93FAcc0a2cfD418403f3AD3EEfB5C8b2dfAec7` |
| Wrapped USDT | `wUSDT.eth` | `0xCB7bBC584475dce754a918ccD92FF6E0211f3CEE` |

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### 🔒 Security & Peg

* All bridged assets are **pegged 1:1** with their original Ethereum counterparts.
* The bridge ensures:
  * **Locking mechanism on Ethereum**
  * **Minting and burning logic on QIE**
  * **Secure release mechanism back on Ethereum**

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### ⚠️ Notes

* Only **USDC and USDT** are currently supported.
* Wrapped tokens on QIE are **non-native** and should only be handled via the bridge.
* Ensure that you always use the **official bridge interface -**[**https://bridge.qie.digital/**](https://bridge.qie.digital/stable-bridge) to avoid loss of funds.

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### ✅ Example Use Case

Imagine you want to use USDC on a dApp that runs on the QIE network. Simply bridge your USDC from Ethereum, and you'll receive `wUSDC.eth` on QIE — usable just like native tokens. When you're done, bridge them back, and your original USDC will be unlocked on Ethereum.