TokenPocket

This guide will walk you through how to bridge BTC using TokenPocket and start interacting with the zkBTC bridge.

1. Launch the TokenPocket, tap “Send” and Input the zkBTC Bridge Mainnet Operator Address

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

bc1qcwc08898aseahq2e5920m9395py3jjtm2xnt0s90slqra7cry2dq2xv9uq

⚠ Please remember double-check the receiving address before proceeding!

2. Set the Transfer Amount

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

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

3. Enable Advanced Mode and Fill in OP_RETURN

  • Scroll down and tap “Advanced Mode”.

  • Save OP_RETURN output, click "Next" then review and confirm the transaction;

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

Example:

  1. If your ETH address is 0x1234567890abcdef1234567890abcdef12345678, then input your Ethereum receiving address without "0x" as shown below

  1. Click to confirm the OP_RETURN input field, then review and confirm the transaction details to complete the transfer.

⚠️ Important Tips:

  • Minimum transfer amount: 21,000 sats

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

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