the future? and thus make external oracles obsolete (like chainlink)? or is it not possible?
Just my opinion, it's possible but I don't see why it would threaten the existence of Chainlink. Chainlink is much more than oracles, and you'd have to evaluate what benefit an ecosystem would gain by having their own. There have been a few examples of projects rolling their own oracle (or price feed rather) and they end up rekt.
ok so it's possible but it creates many disadvantages for the blockchain itself, given that a "serious" blockchain is designed to be secure and unassailable from the outside and therefore was "deliberately" created in isolation from the outside world. so in short an external oracle is essential.
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