Exactness ValueMeaning

EXACT

User can pay only the exact amount as mentioned in the link.
EXACT_DOWN
User can pay the exact amount as mentioned in the link or any amount lower than that upto a certain minimum limit.
EXACT_UP
User can pay the exact amount as mentioned in the link or any amount higher than that upto a certain maximum limit.
RANGE
User can pay any amount between the mentioned minimum limit and maximum limit.
ANY
User can pay any amount.