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Body must be a string. You can use form instead of body. Reference: https://www.npmjs.com/package/request#forms


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Nodes communicate to each other using the peer-to-peer protocol, typically using TCP port 8333. They rumor blocks and transactions to each other, request data, tell each other about other IP addresses in the network, ... Each node implements the level of validation they desire; some download all blocks and validate everything (full nodes), some do that but ...


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