This question is an exact duplicate of:

- How is difficulty calculated for miners?

So let’s say we have to produce a hash that start with “0000”

I hash a block over and over by changing the nonce inside it.

Eventualy I will find a hash that start with “0000”.

What is difficulty here? Is it the ammount of zĂ©ros we require the hash to start with? More zero’s would be more difficult? Does it have to do with the nonce?

I understand that the higher the difficulty the more hashes it will take to find it.

If my difficulty is one how do I apply the difficulty in the hashing process.

Right now all im doing is hashihing a block everytime I add 1 to the nonce wich represent the number of hash.

So how do I implement the difficulty in the hash calculation.

I am programming a blockchain from scratch!

Exemple of my code;

`generateHash(block) { let hash = sha256(block.key) // key contain the block data while(!hash.startsWith("f07a")) { // we hash until the hash start with f07a block.nonce += 1 // add 1 to nonce for each try hash = sha256(block.key) // Trying with the new nonce //console.log(hash) } return hash } `

So how would I implement difficulty here? I know i would have to do more math acording to network hashrate but to understand it in my case how would I use a difficulty of 1 here?