getLiquidityPair

function getLiquidityPair(
    address _tokenA,
    address _tokenB,
    uint256 _amountIn
) external view returns (
    uint256 amountA,
    uint256 amountB
)

uint amountB = (amountA*reserveB) / reserveA;

// 유동성풀을 통한 토큰 개수 얻기
await ComputeContract.connect(accounts[0]).getLiquidityPair(
    mockToken0Contract.address,
    mockToken1Contract.address,
    1000000
)

// 결과 (토큰A, 토큰B 개수)
[ BigNumber { value: "1000000" }, BigNumber { value: "500000" } ]