Bitcoin Forum

If there is some coin that cloned bitcoin, litecoin, how to hardfork it?

Revise source code and then make new wallet, then release it to public?

If want to increase total coin supply, then? Revise total coin variable and halving rate variable, then ok?

How to premine after this?

Forking a coin is not as easy as creating a token. And it's not just forking but you should have enough miners to keep the network running.
Scrypt coins are generally easier than sha256 and cryptonight to fork and maintain.

Here's a starting guide from the forum itself https://bitcointalk.org/index.php?topic=225690.0

Forking a coin to me is a way to run the same coin in different way and different software with a new unique thing which you think is missing the the fork coin and others are not seeing it that way then you can go ahead to fork and create a new wallet and miner to mine the coin , but with the way you sound , am very sure that you are asking to have some cool cash free and enjoy with it as you made mention of premine just like btg, which I see as a greed and we need no room for such in crypto.

I think it is something complicated to explain about but how I understand it is like a term which is referring to hardware development. They fork the coin making more path where it is connected to the original coins. It complicated though beneficial in some ways.

if you can not answer these questions on your own yet then it means you must not attempt in creating a clone coin because you will only waste your time.
gone are the days where people copied bitcoin code and created a copycat shitcoin and made money. nowadays people don't even pay attention to such useless tokens and you won't even be able to list them on exchanges without having to spend a lot of money and in the end lose a lot!

creating a new coin is not just about copying the code and changing a variable. you should understand what you are doing and most importantly have some innovation when creating the new coin.

in my opinion it is very complicated to clone Bitcoin, etc., because there are a lot of things that must be done as a security reinforcement

I'm not a coder but if you really don't have an idea on what you should do to fork then don't simply do it.

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It's not like an excel file that you can modify and have those calculations inserted. If you want to have the easiest one, finding your best programmer that knows how to will save you time.

Making cryptocurrencies is not as complicated as you might think. You only need to make your own coins through ERC-20 and then name them. For those who don't know the cryptocurrency, they don't even know who is the real bitcoin.

As for me, there are enough clones now and this is probably a slightly simplified option than creating a new coin on a new platform. There are also fork with free software, where a smart team can learn a lot of interesting things.

not easy indeed, and the hardfork process will also take time and can impact on the market like when bch do hardfork. various considerations and also the support of the team and investors are also very important in the hardfork process.

So I am not newbie and I am not ignorant of programming.

I have experience of cloning litecoin.

But that was start new chain from 0 height.

I am curious now about hardfork precautions of existing coin.

https://masterthecrypto.com/wp-content/uploads/2017/10/wsi-imageoptim-Copy-of-Copy-of-CRYPTOCURRENCY-1-1.jpg

Hard forks refer to a software upgrade that isn’t compatible with older versions. All participants must upgrade to the new software to continue participating and validating new transactions. Those who didn’t upgrade would be separated from the network and cannot validate the new transactions. This separation results in a permanent divergence of the blockchain. As long as there is support in the minority chain – in the form of participants mining in the chain – the two chains will concurrently exist.

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Source: https://masterthecrypto.com/guide-to-forks-hard-fork-soft-fork/

So how to do hardfork actually? How to revise codes?

Are you a programmer by profession? if you aren't then you can't understand on how to do forks.

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As I've said, if you don't know then you just have to stop or hire someone that know how to.