**Public interactions between DocHex (CTO Peter Gray) and the switck alias:** ### GitHub **Primary self-conversation (2020):**

GitHub

PR's accepted? · Issue #7 · switck/libngu

Welcome to Open Source... I see this is MIT licensed and we'd like to use some (or really all of it) in certain projects, like @Coldcard. Would you...

- **doc-hex** (2020-10-21): “Welcome to Open Source... I see this is MIT licensed and we'd like to use some (or really all of it) in certain projects, like @coldcard. Would you accept code from us when we give it as PR?” - **switck** (same day): “not an issue” → “JK. just depends on PR” **Other public activity on the same repo:** -

GitHub

AES is slow · Issue #12 · switck/libngu

The CIFRA AES code you are using is quite slow. There may be better options out there...

— doc-hex opens the issue (“AES is slow”) -

GitHub

Import of submodules doesn't work · Issue #8 · switck/libngu

I've managed to compile NgU and it works, but I can't import sub modules in one step. >>> import ngu >>> ngu.hash <module 'hash'> >>> ngu.hash.ripe...

— doc-hex replies as if maintainer (“I'll see if I can fix this import issues and give a PR”) -

GitHub

Adds hardware accelerated SHA256, HMAC on certain STM32 parts by doc-hex · Pull Request #17 · switck/libngu

also uses sha256_single() in a few cases, just in case that is accelerated

— doc-hex adds commits; switck merges them (“switck merged 4 commits … doc-hex added 4 commits”) ### X / Twitter **Direct public thank-you from the alias to the real account:**

X (formerly Twitter)

switck (@switck) on X

Thanks for merge @DocHex ... I’m making yet another bitcoin library. Could be useful on @COLDCARDwallet someday.

> “Thanks for merge @DocHex ... I’m making yet another bitcoin library. Could be useful on @COLDCARDwallet someday.” (Posted by @switck on 16 Oct 2020) These are the documented public cross-interactions between the two identities. The Coinkite blog thank-you to @switck for the 4.0.0 library is company-level and not a direct DocHex ↔ switck exchange.

Thanks @Laser