I guess this behavior is wrong:

We are trying to read 32 bytes and returning error if fread_size == 0, but actually we should return error in any case if we don't read exactly 32 bytes, like this:

https://github.com/DeckerSU/KomodoOcean/blob/37b086f98d87be8aa727efd1fae03cbada6c8f38/src/cryptoconditions/src/include/ed25519/src/seed.c#L33-L36

    const size_t items_read = fread(seed, 1, 32, f);
    fclose(f);
    if (items_read != 32)
        return 1;