imToken Wallet Guide

1. Open imToken and Navigate to Your BTC Wallet. Tap “Transfer” to start the transfer process

2. Input the zkBTC Bridge Mainnet Operator Address

In the recipient address field, enter the official zkBTC Bridge operator address:

bc1ququplway2l5prvt299j900s5sm3p6zw9r7d5lx84w0qgczd4sp5scxcpls

Please remember double-check the address before proceeding!

3. Set the Transfer Amount

• Enter a BTC amount no less than 21,000 sats (i.e. > 0.00021 BTC)

• Transfers below this threshold will fail to process through the bridge

4. Enable Advanced Mode and Fill in OP_RETURN

• Scroll down and tap “Advanced Mode”. In the OP_RETURN field and choose “Hexadecimal character ” and input your Ethereum receiving address.

• $zkBTC will be minted on Ethereum, sent to the ETH address you provided in OP_RETURN:

Example:

If your ETH address is 0x1234567890abcdef1234567890abcdef12345678, then input your address as shown below:

Important Tips

• Minimum transfer amount: 21,000 sats

• OP_RETURN must be accurate: Incorrect format or address = failed cross-chain