Add support for Nano

[hewigovens]

Name: Nano
HD Derivation Scheme: BIP44/165
Symbol: NANO

Checklist

• Implement functionality in C++. Put it in a subfolder of src/.
  • Address (if necessary)
  • Transaction (if necessary)
  • Signer
• Write unit tests. Put them in a subfolder of tests/.
• Add relevant constants in TWCoinType, TWP2SHPrefix, TWEthereymChainID, TWHRP, etc., as necessary.
• Return correct curve and purpose in src/Coin.cpp.
• Implement address validation and derivation in src/Coin.cpp.
• Implement coin configuration src/include/TWCoinTypeConfiguration.cpp.
• Write interface header in include/TrustWalletCore and implement the interface in src/interface.
  • Address interface (if necessary).
  • Signing interface.
• Validate generated code in Android an iOS projects. Write integration tests for each.

[zhyatt]

@hewigovens @eddywm Thanks for looking into the integration of Nano into your wallet. Some of the links you have aren't updated with the latest information. For example block details in the nanode.co link above are incorrect. We'd recommend reviewing the integration guides here https://developers.nano.org/guides and if you have questions please reach out to info-at-nano.org to connect with our team.

[eddywm]

Hey @zhyatt
https://developers.nano.org/guides seems to be lacking important information necessary for integration.
Necessary Informations are missing in that guide like :

• Mnemonic derivation used and reference cases : Public Key <-- Private Key <-- Extended Keys <-- Phrase
• Account / Address Derivation
• Transaction structure and building

That's the reason why we picked old seemingly outdated guide. I we can get updated information on those listed points, that'll be well helpful

[vikmeup]

@eddywm can you update progress on the integration?

[eddywm]

I'll be starting in this week.
I was waiting for the right curve to land in and to finish top priority tasks I had.

[roosmaa]

Nano team has asked me to pick up this integration. Plan is to have the pull-requests up for review by the end of the week.

[eddywm]

Nano team has asked me to pick up this integration. Plan is to have the pull-requests up for review by the end of the week.

That's awesome we'll be glad to help with some guidance.

[roosmaa]

Ok, I have integration ready on my fork of wallet-core. Will be creating 2 pull requests (as per the integration guide), first one for the trezor-crypto changes. When that is merged, will create the 2nd PR for the actual coin integration. There are a couple of points where I'd like TW team input, which I'll raise in the respective PRs.