Kyber Network 3.0

1contract DMMFactory is IDMMFactory {
2    using EnumerableSet for EnumerableSet.AddressSet;
3​
4    uint256 internal constant BPS = 10000;
5​
6    address private feeTo;
7    uint16 private governmentFeeBps;
8    address public override feeToSetter;
9​
10    mapping(IERC20 => mapping(IERC20 => EnumerableSet.AddressSet)) internal tokenPools;
11    mapping(IERC20 => mapping(IERC20 => address)) public override getUnamplifiedPool;
12    address[] public override allPools;
13​
14    event PoolCreated(
15        IERC20 indexed token0,
16        IERC20 indexed token1,
17        address pool,
18        uint32 ampBps,
19        uint256 totalPool
20    );
21    event SetFeeConfiguration(address feeTo, uint16 governmentFeeBps);
22    event SetFeeToSetter(address feeToSetter);
23​
24    constructor(address _feeToSetter) public {
25        feeToSetter = _feeToSetter;
26    }
27​
28    function createPool(
29        IERC20 tokenA,
30        IERC20 tokenB,
31        uint32 ampBps
32    ) external override returns (address pool) {
33        require(tokenA != tokenB, "DMM: IDENTICAL_ADDRESSES");
34        (IERC20 token0, IERC20 token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
35        require(address(token0) != address(0), "DMM: ZERO_ADDRESS");
36        require(ampBps >= BPS, "DMM: INVALID_BPS");
37        / only exist 1 unamplified pool of a pool.
38        require(
39            ampBps != BPS || getUnamplifiedPool[token0][token1] == address(0),
40            "DMM: UNAMPLIFIED_POOL_EXISTS"
41        );
42        pool = address(new DMMPool());
43        DMMPool(pool).initialize(token0, token1, ampBps);
44        / populate mapping in the reverse direction
45        tokenPools[token0][token1].add(pool);
46        tokenPools[token1][token0].add(pool);
47        if (ampBps == BPS) {
48            getUnamplifiedPool[token0][token1] = pool;
49            getUnamplifiedPool[token1][token0] = pool;
50        }
51        allPools.push(pool);
52​
53        emit PoolCreated(token0, token1, pool, ampBps, allPools.length);
54    }
55​
56    function setFeeConfiguration(address _feeTo, uint16 _governmentFeeBps) external override {
57        require(msg.sender == feeToSetter, "DMM: FORBIDDEN");
58        require(_governmentFeeBps > 0 && _governmentFeeBps < 2000, "DMM: INVALID FEE");
59        feeTo = _feeTo;
60        governmentFeeBps = _governmentFeeBps;
61​
62        emit SetFeeConfiguration(_feeTo, _governmentFeeBps);
63    }
64​
65    function setFeeToSetter(address _feeToSetter) external override {
66        require(msg.sender == feeToSetter, "DMM: FORBIDDEN");
67        feeToSetter = _feeToSetter;
68​
69        emit SetFeeToSetter(_feeToSetter);
70    }
71​
72    function getFeeConfiguration()
73        external
74        override
75        view
76        returns (address _feeTo, uint16 _governmentFeeBps)
77    {
78        _feeTo = feeTo;
79        _governmentFeeBps = governmentFeeBps;
80    }
81​
82    function allPoolsLength() external override view returns (uint256) {
83        return allPools.length;
84    }
85​
86    function getPools(IERC20 token0, IERC20 token1)
87        external
88        override
89        view
90        returns (address[] memory _tokenPools)
91    {
92        uint256 length = tokenPools[token0][token1].length();
93        _tokenPools = new address[](length);
94        for (uint256 i = 0; i < length; i++) {
95            _tokenPools[i] = tokenPools[token0][token1].at(i);
96        }
97    }
98​
99    function getPoolsLength(IERC20 token0, IERC20 token1) external view returns (uint256) {
100        return tokenPools[token0][token1].length();
101    }
102​
103    function getPoolAtIndex(
104        IERC20 token0,
105        IERC20 token1,
106        uint256 index
107    ) external view returns (address pool) {
108        return tokenPools[token0][token1].at(index);
109    }
110​
111    function isPool(
112        IERC20 token0,
113        IERC20 token1,
114        address pool
115    ) external override view returns (bool) {
116        return tokenPools[token0][token1].contains(pool);
117    }
118}

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