Run with:
python tracer.py -U -i crypto_box_curve25519xsalsa20poly1305_tweet_keypair -i crypto_box_curve25519xsalsa20poly1305_tweet -i crypto_secretbox_xsalsa20poly1305_tweet -i crypto_secretbox_xsalsa20poly1305_tweet_open -i send -i recv -i close -X libNimsWrap.so com.supercell.clashofclans
For basic file handling support, use the modified version of tracer.py here.