# UserDataIndex

`UserDataIndex`
  UserDataIndex: (number | string)

  This is the User Data Index for a node.

  Values of this type are unsigned 64 bit numbers.

  A value is of type `number` when it can be represented precisely as such.

  Otherwise a value is of type `string`, where the string is the hex encoding of the index. The hex representation is in uppercase and does not have a leading `0x`.

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