I have been examining the Jota IOTA library and see a lot of code that strips the checksums from addresses before hitting the node API. Would it be safe to say the 90 character addresses (with 9-character checksum) are only meant for users and not for usage by IoT devices and therefore should not be used with the node API?

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Correct, the checksums are intended only be part of the UX, and recently the IOTA team has made efforts to make the API consistent in only sending 81-character addresses to nodes, see here. This is not something there is an official source on, but something that has been confirmed in conversations with the main developers.

  • Yeah I've since figured out more about this. Examined all the places in the API where an address is used and they're all 81 characters. So I am not going to use 90 char addresses anywhere in my code unless it is to present an address to the user or to input an address from the user. Commented Nov 30, 2017 at 14:22
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    Yes, and if there is user input of an address, you should trim it down to 81 characters. This caused a difficult-to-locate bug in my code before I fixed it!
    – Laurence
    Commented Nov 30, 2017 at 14:55

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