The rBNB exchange rate Ci grows with the increase in staking income. It is determined by the total number of BNB locked in the staking contract Qstk, the total number of redeemed BNB Qred, the number of staking rewards Qrew, the number of slashes Qslh, the commission rate Rcom, the total number of rBNB issued M, and the total number of burnt rBNB N. The calculation formula is as follows: