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Generally I see that bip32 derivation paths are something like m/1/2/3/4, etc

How deep is allowed? Is there a limit on how deep the tree can go?

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A path can have, at most, 256 elements, including the master. This limitation comes from the extended public key serialization format's depth field. This field is a single byte which means it only has 256 possible values.

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  • I dont get it. What happens if I try to get 'm/44/0/0/666' address? Dec 18, 2019 at 23:03
  • Nothing happens, that's a valid path. Depth is the number of elements; basically the number of /'s. The actual value of each element can be a at most 2^31 - 1.
    – Ava Chow
    Dec 19, 2019 at 3:47

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