The Bitcoin Cash (BCH) network will undergo a semi-annual hard fork upgrade at 12:00 on November 15 (UTC) as scheduled. Due to two node schemes of Bitcoin Cash ABC and Bitcoin Cash Node, it is likely that BCH will split into two chains and generate brand-new coin in this fork.
ViaWallet supports two schemes. By holding BCH, you can obtain BCH (Bitcoin Cash Node) and BHA (Bitcoin Cash ABC). Since there’s no transaction replay protection in this fork, you’re highly recommended to take related measures to ensure your asset security.
Both of chains are at risk of replay attack because of the same address, private key, signature regulation and transaction format after the fork. In other words, if BCH or BHA is transferred after the fork, since the corresponding transaction data is also valid on the other chain, the other asset will be transferred at the same time.
How to prevent replay attack?
You can select one of the following methods to avoid replay attack:
Method 1: Obtain forked coin via CoinEx
You can deposit BCH to CoinEx, which supports this fork. Around the fork, deposit is available, and you will receive forked coin from CoinEx with replay protection. For more info, please see CoinEx’s official announcement for details.
CoinEx website: CoinEx - The Global Digital Coin Exchange
Method 2: Separate asset by yourself
After the fork, by withdrawing a small amount of BCH or BHA to your wallet via CoinEx, and transferring the balance of BCH and BHA respectively to your wallet, you can separate your asset.