List subnets programmatically

Developers
1

How do I programmatically find the list of subnets?

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2

here is how ic-admin gets it from the registry canister:

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3

Thanks @yvonneanne. Those donā€™t seem to be functions exposed in public crates, so Iā€™m not sure if everything would need to be copied. :thinking:

PS: Not an urgent question, it can definitely wait until working hours.

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4

what do you need the list for?
the CMC has a public query method to get default subnets (Iā€™m not sure what default subnets areā€¦ maybe the ones new canisters would be on at random if no additional conditions apply?)
https://dashboard.internetcomputer.org/canister/rkp4c-7iaaa-aaaaa-aaaca-cai

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5

Ah, thatā€™s nice! I also noticed it, but like you, I was confused about what ā€˜defaultā€™ means. If thatā€™s the public list, that should work. Thanks!

6

Yes, thatā€™s exactly what it is. You can see that the output matches what has been defined in the latest proposal.

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7

Iā€™m still a bit unsure about what ā€˜defaultā€™ means. I wanted to add it to DFINITYā€™s ic-js, but Iā€™m not sure how I should document it. The Rust code is also undocumented. What could be an accurate description for it?

8

Maybe this explanation by Severin helps: NNS Updates Dec 1, 2023 - #8 by Severin

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9

Thanks, now I understand how ā€œdefaultā€ is used. But is it safe to say that ā€œdefaultā€ equals the ā€œpublicā€ subnets (as in the proposal shared above)?

Or are the ā€œdefaultā€ subnets a subset of the ā€œpublicā€ subnets?

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10

In code and proposal public == default is valid. IMO it would be more correct to also include the ones publicly accessible by specifying a subnet type, but oh wellā€¦

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11

Iā€™m not entirely I get everything but, it answered my questions. Gonna work with the default. Thanks for the explanation!

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