Soft Fork (Blockchain)

November 21, 2023 - Around 2 mins mins to read

Understanding Soft Fork (Blockchain)

A soft fork in the blockchain refers to a modification or addition that does not bring about any fundamental changes to the structure. It allows for the implementation of new features without invalidating previous transactions or blocks for network participants who choose to follow the new consensus rules. However, nodes that continue to adhere to the old consensus rules can still consider newer transactions or blocks as valid. This backward compatibility sets soft forks apart from hard forks, which make old consensus-following nodes incompatible with the new rules.

One notable aspect of soft forks in cryptocurrencies is that they do not require all miners on the network to adopt the new code. Instead, they can be implemented with the majority of miners agreeing to the changes. This enables faster network upgrades and helps prevent significant divisions within the community. Soft forks can also occur due to mistakes made by miners who unknowingly violate new rules. Reversing a soft fork can only be achieved through a hard fork.

Bitcoin and Ethereum, two prominent cryptocurrencies, have utilized soft forks to upgrade their respective networks, address issues, and enhance functionality. These soft forks have been preferred over hard forks, as they do not necessitate unanimous agreement from all miners, reducing the risk of network splits. A well-known example of a soft fork is the Bitcoin Segwit upgrade, which increases block capacity by removing signature data from transactions.