Bitcoin qt wallet dump-import PROBLEM !

[MeisterDutch]

Hi folks,

First of all sorry for my grammer mistakes. I am newbie on cryptocurrencies.
I have a bitcoin core desktop wallet and multiple receiving addresses.

I am developing an API for getting payment via Bitcoin. Anyway, When I create a new BTC address in same time I want to backup private key into a DB.

I created an example address  : 3AzHxHsjQUrJeo61zYXmrJrWNeyHxZ61PS (via GetNewAddress method)
And it's private key L4b7UBiKgM1nr1vn2xdJGupVmg77xKYGi8id7YneDmnopafciDkB (dumpprivkey)

When I go to an empty another bitcoin core wallet for import this private key (importprivkey) it creates another bitcoin address (1Mkw8Sa32VZTFyesrubYKSUTEmgVof4okq)
But I was expecting to give me first address (3AzHxHsjQUrJeo61zYXmrJrWNeyHxZ61PS)

Can anybody tells me what is the problem  ?

Thanks

[Thirdspace]

I created an example address  : 3AzHxHsjQUrJeo61zYXmrJrWNeyHxZ61PS (via GetNewAddress method)
And it's private key L4b7UBiKgM1nr1vn2xdJGupVmg77xKYGi8id7YneDmnopafciDkB (dumpprivkey)

When I go to an empty another bitcoin core wallet for import this private key (importprivkey) it creates another bitcoin address (1Mkw8Sa32VZTFyesrubYKSUTEmgVof4okq)
But I was expecting to give me first address (3AzHxHsjQUrJeo61zYXmrJrWNeyHxZ61PS)

what's weirder is that when I tried that privkey on bitaddress.org, I get different legacy address
it gives me 1CwQqU6fekhLCGxqVYLZqqNPJ8M4GzaDMX instead, which I think the correct compressed legacy address for that privkey

Can anybody tells me what is the problem  ?

you created segwit address but you've only just imported a legacy address
after you've imported its legacy address, you can try use addwitnessaddress on that legacy address
change the parameter of addwitnessaddress to whatever legacy address you get after importprivkey
> importprivkey L4b7UBiKgM1nr1vn2xdJGupVmg77xKYGi8id7YneDmnopafciDkB
1CwQqU6fekhLCGxqVYLZqqNPJ8M4GzaDMX
> addwitnessaddress 1CwQqU6fekhLCGxqVYLZqqNPJ8M4GzaDMX
null

[hugeblack]

Can anybody tells me what is the problem  ?

what's weirder is that when I tried that privkey on bitaddress.org, I get different legacy address

I think this is because WIF of bitcoin core.
you can try the following:
go to -----> electrum.org
download electrum for your OS.[1]
open electrum --->  console and type

Code:

p2wpkh-p2sh: L4b7UBiKgM1nr1vn2xdJGupVmg77xKYGi8id7YneDmnopafciDkB

this will generate your Segwit address.
using same way for Bech32 just remove "p2wpkh-p2sh" and use p2wpkh.[2]
Source
[1] [2]https://bitcointalk.org/index.php?topic=3383265.0