WHAT THE HELL IS HARDFORK ? A LIGHT ON CONCEPT OF HARDFORK.

HI STEEMIANS,

As of now, due to HARDFORK 19 [HF 19], many of my post have increased in value, but as I didn't know what HF19 is tried searching on net and will like to share this info with others.

DEFINITION of 'Hard Fork' :-

As it relates to blockchain technology, a hard fork (or sometimes hardfork) is a radical change to the protocol that makes previously invalid blocks/transactions valid (or vice-versa), and as such requires all nodes or users to upgrade to the latest version of the protocol software. Put differently, a hard fork is a permanent divergence from the previous version of the blockchain, and nodes running previous versions will no longer be accepted by the newest version. This essentially creates a fork in the blockchain, one path which follows the new, upgraded blockchain, and one path which continues along the old path. Generally, after a short period of time, those on the old chain will realize that their version of the blockchain is outdated or irrelevant and quickly upgrade to the latest version

BREAKING DOWN 'Hard Fork'
A hard fork can be implemented to correct important security risks found in older versions of the software, to add new functionality, or to reverse transactions (as in the case with the hard fork to reverse the hack on the DAO (decentralized autonomous organization) in the Ethereum blockchain).

Hard Fork

A hard fork involves splitting the path of a blockchain by invalidating transactions confirmed by nodes that have not been upgraded to the new version of the protocol software. Following the hack on the DAO, the Ethereum community almost unanimously voted in favor of a hard fork in order to roll back transactions that siphoned off tens of millions of dollars worth of digital currency by an anonymous hacker. The hard fork also allowed DAO token holders to get their ether funds returned to them.

The proposal did not exactly unwind the network’s transaction history. Rather, it relocated the funds tied to The DAO to a newly created smart contract with the single purpose of letting the original owners withdraw them. DAO token holders will be able to withdraw ETH at a rate of approximately 1 ETH to 100 DAO. The extra balance and any ether that remains as a result of the re-entrancy exploit and the splitting mechanism will be withdrawn and distributed by the DAO curators, or individuals selected prior to the collapse of the DAO to provide "failsafe protection" for the organization.

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Note:- The above details are from investopedia.com