What Is a Hard Fork and a Soft Fork in Crypto? A Simple Breakdown

In the crypto ecosystem, terms like “hard fork” and “soft fork” are commonly used when top blockchains such as Bitcoin or Ethereum undergo upgrades. Though the terms sound technical, consider it a situation where blockchain is like a shared rulebook that every user on the network respects. So when these changes are made to the rulebook, some users might not agree to follow them. This guide will break it down in plain English for even a common person to understand.

What is a fork in blockchain?

A fork comes from the idea of a road splitting into two paths. A fork happens when developers desire to update or modify the rules of a blockchain. The chain might go in one direction, or it might split into two separate direction chains.

Two main types of forks:

• hard forks and
• soft forks.

AI-Generated Image

What is a hard fork?

A hard fork introduces a permanent, incompatible change to a blockchain’s rules. In a hard fork, nodes running old software can no longer communicate with and validate blocks created by nodes running the new software. The old and new software groups become incompatible with each other and are on different chains unless you upgrade your software.

How hard fork works

Imagine a rule initially stated that blocks in a blockchain should not exceed 1 MB. Then a group of developers proposes changing the limit to 8 MB. After the rule approval, any node still following the 1 MB rule initially approved will consider the new 8 MB blocks invalid. After the fork, the network splits into branches, forming separate blockchains that share the same history.

Can hard forks be controversial or planned?

Not all hard forks are controversial. Some hard forks are planned upgrades that the entire community approves. The old chain becomes invalid and unusable because no one uses it anymore. When the community’s decision is not generally accepted, both chains can survive.

Some remarkable hard forks:

• 2017 — Bitcoin Cash from Bitcoin
• 2016 — Ethereum Classic, after the DAO hack from Ethereum
• 2018 — Bitcoin SV from Bitcoin Cash

What is a soft fork?

A soft fork allows implementing a backward-compatible update to a blockchain’s rules. Unlike a hard fork, which replaces existing rules, a soft fork tightens or restricts these rules. Existing nodes can still read and accept blocks created under new rules. They simply cannot create blocks that leverage the new features.

How soft fork works

If the original rule says “blocks must be under 2 MB,” a soft fork might indicate, “blocks must now be under 1 MB.” Old nodes still consider those smaller blocks valid because they fit within the old 2 MB limit. There is no hard split. Everyone stays on the same chain. Soft forks require miner support to succeed. Adopting the new rules makes the new chain the dominant one.

A common example of a soft fork: Bitcoin’s Segregated Witness (SegWit) upgrade in 2017. Bitcoin’s SegWit changed how transaction data is stored in blocks while remaining backward-compatible, so older nodes can also participate without requesting an immediate upgrade.

Hard Fork vs. Soft Fork

Google Docs (Screenshot)

Why Do Forks Happen?

Forks happen for various reasons. A few that I have listed below:

• Bug fixes: When developers discover a bug or security flaw in a protocol, they may create a fork to fix it.
• Scaling: As the blockchain evolves and traffic increases, congestion can slow the network. Forks are often offered as solutions to increase transaction throughput.
• New features: Adding smart contract support, improving privacy, and changing fee structures often require rule changes in the form of forks.
• Community disagreements: Their communities manage crypto projects, yet in most cases, they don’t reach an agreement. When disagreements cannot be resolved, the hard fork allows each side to continue acting independently.

What Happens to Your Coins During a Fork?

If you hold coins on the initial chain before a hard fork, you will receive an equal amount of coins on both chains after the split, as both chains share the same history. For example, if you held 1 Bitcoin before the Bitcoin Cash fork, you’ll probably end up with 1 BTC and 1 BCH. However, this effect only applies if you control your private keys. If your coins are stored in an exchange, it depends on the exchange’s support of the new coin.

Your assets remain unaffected during a soft fork. You stay on one chain, and no new coin is created.

Are Forks Good or Bad?

• From a technical view, forks are just a normal part of how open-source software evolves. Blockchains need to upgrade to stay relevant, resolve problems, and scale.
• From an investment viewpoint, hard forks can be exciting because you sometimes end up with two coins instead of one. But they can also signal that a community is fighting over the project’s direction, which is not always a particularly reassuring sign.
• From a network security endpoint, splitting a community means splitting the hash power (for proof-of-work chains) because a smaller, less protected chain is more vulnerable to attacks.

FAQs

What is the easiest way to explain a hard fork?

Imagine a hard fork as a software update so fatal that old and new versions can no longer work together. When a high percentage of the community refuses to upgrade, you will end up with two separate blockchains.

Do I lose my crypto during a fork?

No. Your existing coins are not lost. During a hard fork, the possibility of gaining coins on the new chain is high.

Which of the forks can I consider safe?

Soft forks are less risky because they do not split networks after the process. Hard forks bear a higher risk of confusion, duplicate coins, and network instability, especially when the community does not fully agree.

How do I know when a fork is about to occur?

You can check when a fork is about to happen through the blockchain’s official channels, the project’s blog, GitHub, or reputable crypto news sources. Major forks are usually announced in advance.

Can anyone propose a fork?

Yes, anyone can propose a fork, but changes aren’t simple to approve and adopt. Most blockchains have improvement proposal processes, such as Bitcoin’s BIPs and Ethereum’s EIPs, where developers submit and debate changes before anything goes live.

Thanks for reading to the end. I hope you enjoyed this article. Let me know what you think in the comments. You can always hire me to write conversion-focused copy that converts for your business. Contact me here dikenduluesomto.jp@gmail.com