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/ 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.