A feature that allow users to stake (deposit) tokens they owning in wallet to farm and receive rewards from the system.
3 types of farm in the system:
+ Single Farm (LP Farm): Stake LP to earn STAND.
+ Double Farm (LP Farm): Stake LP to earn STAND and another token.
+ Token Farm (STAND farm): Stand STAND to earn STAND
Reward calculation:
+ Calculating Farm Base Reward APY
+Farm Base APY is calculated according to farm's multiplier and the total amount of stake in the farm -- this is the amount of token distributed to the farm.
