# Bitcoin Core 0.13 addrindex available for testing and feedback

**URL:** <https://forums.counterparty.io/t/bitcoin-core-0-13-addrindex-available-for-testing-and-feedback/2560>\
**Category:** Counterparty\
**Created:** [December 30, 2016, 5:26pm UTC](https://forums.counterparty.io/t/bitcoin-core-0-13-addrindex-available-for-testing-and-feedback/2560 "2016-12-30T17:26:28Z")\
**Posts on this page:** 1\
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**Author:** ![something](https://yyz2.discourse-cdn.com/flex004/user_avatar/forums.counterparty.io/something/32/240_2.png) [@something](https://forums.counterparty.io/u/something)\
**Post date:** [December 30, 2016, 7:23pm UTC](https://forums.counterparty.io/t/bitcoin-core-0-13-addrindex-available-for-testing-and-feedback/2560/3 "2016-12-30T19:23:21Z")

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Niiice. I just installed mine, now going (one more time) through Release Notes for Bitcoin Core 0.13.

I’ll post my findings here.

So far I’ve found this:

Bitcoin Core 0.13: “Newly created wallets will use hierarchical deterministic key generation according to BIP32 (keypath m/0’/0’/k’). Existing wallets will still use traditional key generation.”

This seems to be the same as CounterWallet - [Only 20 addresses show up in my counterparty wallet](https://forums.counterparty.io/t/only-20-addresses-show-up-in-my-counterparty-wallet/1052/30) - I wonder if the pass phrases are identical or not.

“Low-level RPC changes” in 0.13 is a must-read material, I think quite a lot of changes which could subtly impact CP!  
Release Notes: [https://bitcoincore.org/en/releases/0.13.0/](https://bitcoincore.org/en/releases/0.13.0/)

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