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Open source

In IcelandicOpinn hugbúnaður

Software whose source code is open to everyone, so anyone may read it, use it, change it and share it.

Open-source software is software whose source code, the recipe for the program, is published for everyone. Anyone may read it, use it, change it and share it, under the terms of the licence that comes with it.

Why does open source matter in crypto?

Most major cryptocurrencies are built on open-source software. Bitcoin Core, the main software for the Bitcoin network, is released under the MIT licence, and anyone can read the code. Ethereum's software is open source too.

This has several advantages:

  • You can check the rules yourself. You don't have to take anyone's word that Bitcoin's maximum supplyMaximum supplyThe largest number of units of a cryptocurrency that can ever exist under its rules, such as 21 million for bitcoin. is 21 million. The rule is written in the code.
  • More eyes catch more bugs. Developers around the world review changes before they are accepted.
  • No single party is in charge. If a group disagrees with the direction, it can take the code and go its own way, which can lead to a ForkForkA change to a blockchain's rules; if not every node follows the change, the chain can split into two separate chains, each with its own coin. in the chain. This supports DecentralisationDecentralisationWhen power and responsibility are spread across many participants, instead of one bank, company or government controlling a system..

Think of a recipe published in full. Everyone can see exactly what goes into the dish.

What it doesn't mean

Open code is not automatically safe. Scammers can publish code too, and few people have the time or skills to read it. Bugs can hide in open-source smart contractsSmart contractA program that runs on a blockchain and automatically carries out what it was written to do once certain conditions are met. for a long time before anyone finds them.

Open source also says nothing about what a cryptocurrency is worth. It only means the rules are visible to everyone.

Everything in Myntkaup Learn is written and regularly reviewed by the Myntkaup editorial team. It is for education and is not investment advice. Editorial policy. Updated 18 October 2026.