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I need to implement Shamir's Secret algorithm in EOS smart contract. Looking for some open source libraries which will support EOS. I researched some here https://github.com/topics/shamir from which I am trying C++ library https://github.com/onbitSyn/shamir_secret_share. Called this library's functions in smart contract. When compile eosio-cpp shamirkey.cpp -o shamirkey.abi, getting errors like:

/usr/opt/eosio.cdt/1.7.0/bin/wasm-ld: error: /tmp/shamirkey.cpp.o: undefined symbol: shamir::init()
/usr/opt/eosio.cdt/1.7.0/bin/wasm-ld: error: /tmp/shamirkey.cpp.o: undefined symbol: shamir::scheme::scheme(int, int)
/usr/opt/eosio.cdt/1.7.0/bin/wasm-ld: error: /tmp/shamirkey.cpp.o: undefined symbol: shamir::scheme::createShares(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >)
/usr/opt/eosio.cdt/1.7.0/bin/wasm-ld: error: /tmp/shamirkey.cpp.o: undefined symbol: GF256::byte::print()

Question 1: How to resolve the above errors if I want to continue with this library?

Question 2: Please suggest best MIT License Shamir's libraries which can be used in the latest EOS smart contract.

For Question 1, if needed I will add smart contract code. Any help would be appreciated.

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