fix libsecp256k1 compilation

[ayrat555]

Currently, we are manually compiling libsecp256k1 in setup script https://github.com/poanetwork/mana/blob/master/bin/setup#L114

Potential solutions:

• Port required functionality to Elixir - https://github.com/ethereum/py_ecc/blob/master/py_ecc/secp256k1/secp256k1.py
• Fix make file of libsecp256k1 nif - https://github.com/exthereum/libsecp256k1/blob/master/Makefile

See also #413

[ghost]

What do you think about coding the functionality in rust, and then porting it to elixir via rustler?

[ayrat555]

@Lokraan I think that's a possible solution.

[ghost]

@ayrat555 I'll start working on that then.

[ayrat555]

it's ok with me
cc @masonforest @germsvel @MattMSumner

[igorbarinov]

@ayrat555 I'll start working on that then.

@Lokraan are you sure? IMO it's very ambitious and time-consuming task to do

[ghost]

@igorbarinov The code is already out there, I just have to port it to rust syntax.

[igorbarinov]

@Lokraan do you plan to use https://github.com/ETCDEVTeam/libsecp256k1-rs ?

[ghost]

@igorbarinov I can use that, I was planning on writing it manually.

[hayesgm]

Have you tried building with version https://hex.pm/packages/libsecp256k1/0.1.10? It should generally fix compilation issues.

[hayesgm]

Marking as done with the upgrade to 0.1.10