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I am wondering how does the Ethereum domain registration works? From what I can see in the whitepaper, I know there is account-specific data storage, but I don't know if that would be the ideal way to register domains. Generally, one would need some shared data storage between all accounts to have globally unique domains.

How does data registration in Ethereum work?

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So the whole point of a name reg contract is not to send transactions, rather its sole purpose is to build up a database which other nodes can then query.

Ethereum smart contracts have immutable storage. This means that you can prove your primacy to a specific name, and other people can then reference that as part of a database.

What it comes down to is the credence other entities hold towards a specific name reg Dapp (Network effect, utility, what service it is registering names for etc). In some situations people would want a name reg for a specific purpose, say a list of Escrow contracts for one company, this could then be used internally, or shared. In others as you mention in your question, people would rather look towards a singular name reg which controls a DNS service.

You can have a look at an example name registration smart contract here:

Hope you find this useful!

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