How spending same coins both at BCC and BTC blockchains prevented?

1

------X--.---------- BTC Blockchain \ .--------- BCC Blockchain

Let's say that we have some BTC coins from a transaction at block X. And, there are two blockchains now. Is spending these coins at both blockcoins prevented? Are there any BTC/BCC cross check for double spending?

yozel

Posted 2017-08-02T12:55:21.973

Reputation: 11

Question was closed 2017-08-05T21:04:40.153

Answers

0

This is from their FAQ.

Bitcoin Cash transactions use a new flag SIGHASH_FORKID, which is non standard to the legacy blockchain. This prevents Bitcoin Cash transactions from being replayed on the Bitcoin blockchain and vice versa.

m1xolyd1an

Posted 2017-08-02T12:55:21.973

Reputation: 3 356

I'm not talking about replaying a transaction. What I ask is what would happen if someone creates two different transactions for two different blockchains, using the same private key. – yozel – 2017-08-02T13:13:24.310

Then I don't understand your question – Pieter Wuille – 2017-08-02T14:02:43.337

Asked: 2017-08-02T12:55:21.973

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