What religion was in the ancient Russian state?

Before the Baptism of Rus in 988, paganism prevailed in the country. However, after Baptism, Christianity did not strengthen immediately and folk Christianity was formed. It spread primarily among urban residents. But all the same, pagan holidays persisted, newborns, according to pagan traditions, continued to be called by the names of deceased relatives. Among ordinary people, the use of syncretic amulets continued.
The consolidation of Christianity continued until the arrival of the Mongol-Tatars.