what is the relationship between BIP32 Extended Public Key and Pubic Key? Can you change it?
for example:
BIP32 Extended Public Key: xpub69RogXjzChBZoR8iyx4YoSgFcECGTDM8vV28YAnFHXYpNCxuphieARWjPk4Yd4EvPsugHAcgYS8E3o2fftsFaPVuMc6f48fRuhr7GkRQz3M
Pubic Key:
02dd768d143cc57248a9ebd3281d93806af458724772a1db717098ed9321d2fe40
when public key is the first (original) key (also known as matser key), extended public key is the extended public key, derived from this master key, no matter how many extended public key, it derives from master key, the corresponding content is exactly the same.
The purpose ofextended public key is that when the node (node) is getting deeper and deeper, there is no need for the previous node to go back to the root node step by step to proofread the public key, and directly use its derived extended public key to do the proofreading.
if an array is defined in the smart contract, and the append method. So to read the latest value of this array, do you need to traverse the relevant transactions in the entire block chain and read out all the append (and possibly delete) to finally get t...