cloudhead/nakamoto

Support service bit filtering

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#50 aberto em 18 de set. de 2021

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good first issuehelp wanted

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Description

To have a higher chance to connect to peers with NODE_COMPACT_FILTERS support, we could use the service bit filtering functionality of DNS seeds.

This is not a very well documented feature, but there is some information here: https://bitcoin.stackexchange.com/questions/60373/dns-seeder-options

The filter we'd be interested in is NODE_NETWORK | NODE_COMPACT_FILTERS, so 1 << 0 | 1 << 6 = 65.

Since not all seeds support this functionality, we should fall back on a regular DNS query if we're unable to retrieve addresses from the seeds.

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