Hi all, What is the fastest way to track the appearance of a new block in the blockchain? Bitcoin core? Other minds?
Any well connected peer on the network will be fast. Detecting it is really a matter of waiting until a peer that you are connected to has received it, verified it, and then forwarded it to you.
Once you've detected it, you'll need to verify that it is valid. To do that without trusting any third party you'll need a full node implementation. There are a few of them out there. I'd suggest either Bitcoin Core (written in c++) or Bcoin (written in Node.js).
Thanks for your response but trust to 3rd party in not an issue if it's the fastest way I'd use it. I want to track the appearance of the 494784 block as soon as possible in order to sell my BTCs at the next moment.