Diff to the kyber swap contract swapMath in calcReturnedAmount function

[WagZol]

Error:

In the kyber swap elastic contract at the calcReturnedAmount function, if the isToken0 = false then the second element of the addition(the result will be the returned amount) is floored, but in the sdk implementation the mulDivRoundingUp used instead of mulDiv

Proof

Part of original SwapMath.lib of Kyber swap elastic pool contract:

Implementation of the 'calcReturnedAmount' of the SDK:

ks-sdk-elastic/src/utils/swapMath.ts

Line 124 in e277662

JSBI.multiply(FullMath.mulDivRoundingUp(liquidity, Q96, sqrtRatioCurrentX96), JSBI.BigInt(-1))

@viet-nv could you please check it?