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I'm starting my studies about Chainlink this week and right now I'm trying to fit all together before I continue my exploration of Chainlink docs. May be you could help me in this task.

Could you confirm this understanding?

As I've already read, there are 3 models in Chainlink:

  • Decentralized Data Model with Flux Aggregator where the oracle smart contract receives prices report of crypto assets and aggregate them to offer this information to consumers. However, this model is being deprecated in favor of OCR, right?
  • The Off-Chain Reporting that aggregates the prices of crypto assets off-chain and send a single transaction to the oracle smart contract and this smart contract offer the median of prices to the consumers.
  • Basic Request Model where it is possible to call any Chainlink job. Typically, this job is a API calling with some transformations before the result is sent to the smart contract consumer.

If I'm not misunderstanding this basics concepts, I have some doubts:

  • The first two models, DDM and OCR, are only for assets' prices or they could be used for other kinds of data since exists oracles providing that data? If true, are there real examples of this kind of usage?
  • About the Basic Request Model, I feel like it is a centralized solution, I haven't seen any step of aggregation/conciliation, only one node responds and that is it. Is this understanding right or I'm missing something?
  • Another concept not clear yet: what is a Data Provider? I found out this page https://market.link/search/data-providers and seems like centralized providers of data, is that right?
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Sort of an open secret, but LINK is pretty centralized and they have a lot of stuff in the works. How link actually works is it's just a set of whitelisted nodes that place data on-chain via running some scripts. They're not decentralized, not subject to slashing, and there's a 3/21 multisig that could cut your feed at any moment. That said, they've been running price feeds pretty successfully now for a few years and although they've had the occasional hiccup in the past, they're pretty reliable and do a good job.

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