set with no info

Here's one which baffled me. I literally just sat down first hand have nothing on villain!

$0.05/$0.10 No Limit Holdem
3 Players
Hand Conversion Powered by weaktight.com

Stacks:
BTN Dm00012 ($10)
SB cotton1944 ($10)
BB Hero ($10)

Pre-Flop: ($0.15, 3 players) Hero is BB
Dm00012 folds, cotton1944 calls $0.05, Hero raises to $0.30, cotton1944 calls $0.20

Flop: ($0.60, 2 players)
cotton1944 checks, Hero bets $0.45, cotton1944 calls $0.45

Turn: ($1.50, 2 players)
cotton1944 checks, Hero bets $1.20, cotton1944 calls $1.20

River: ($3.90, 2 players)
cotton1944 bets $2.20, $2.2 to Hero ($8.05)?