USDC Bridge (qUSDC)

Bridge USDC from Base to RougeChain as qUSDC, and back.

Overview

qUSDC is a wrapped representation of USDC on RougeChain. It maintains a 1:1 peg with USDC locked in the RougeBridge contract on Base.

USDC Contract on Base mainnet: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Base Sepolia test USDC: 0x036CbD53842c5426634e7929541eC2318f3dCF7e)

Deposit (USDC → qUSDC)

1. Approve the RougeBridge contract to spend your USDC
2. Call depositERC20(usdc_address, amount, rougechainPubkey) on the contract
3. The relayer's deposit watcher detects the BridgeDepositERC20 event and auto-claims it — qUSDC is minted to your L1 wallet, no manual step needed.
4. Manual fallback: on the Bridge page select USDC → Bridge In, paste the EVM tx hash, and claim.

The node parses the ERC-20 Transfer event from the transaction receipt to determine the amount. USDC uses 6 decimals, and qUSDC uses the same 6-decimal precision.

Withdraw (qUSDC → USDC)

1. Go to Bridge page, select USDC, switch to Bridge Out
2. Enter amount and destination EVM address
3. Click Bridge Out qUSDC

The relayer calls releaseERC20() on the RougeBridge contract to send USDC back to your EVM address. If the release keeps failing, the withdrawal is auto-refunded as qUSDC on L1.

Fees