פירוש על קידושין 100:4

According to both of these amoraim, if a woman agreed to be betrothed and then the husband sent gifts, the gifts may be considered betrothal money.

The mishnah says that gifts are not considered betrothal money, which seems to contradict R. Huna and Rabbah. But Abaye explains this is only if there was an invalid act of betrothal that preceded the gifts. If there was no prior formal betrothal act, the gifts may actually be betrothal money, even though they were sent as gifts.