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https://github.com/Instadapp/smart-contract.git
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basic MCD functions except wipe
This commit is contained in:
Thrilok kumar
parent
8dffe62a18
commit
ed07214768
333
contracts/ProxyLogics/MCD/InstaMCD.sol
Normal file
333
contracts/ProxyLogics/MCD/InstaMCD.sol
Normal file
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@ -0,0 +1,333 @@
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pragma solidity ^0.5.8;
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interface GemLike {
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function approve(address, uint) external;
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function transfer(address, uint) external;
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function transferFrom(address, address, uint) external;
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function deposit() external payable;
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function withdraw(uint) external;
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}
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interface JugLike {
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function drip(bytes32) external;
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}
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interface ManagerLike {
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function cdpCan(address, uint, address) external view returns (uint);
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function ilks(uint) external view returns (bytes32);
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function owns(uint) external view returns (address);
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function urns(uint) external view returns (address);
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function vat() external view returns (address);
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function open(bytes32) external returns (uint);
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function give(uint, address) external;
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function cdpAllow(uint, address, uint) external;
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function urnAllow(address, uint) external;
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function frob(uint, int, int) external;
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function frob(
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uint,
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address,
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int,
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int
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) external;
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function flux(uint, address, uint) external;
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function move(uint, address, uint) external;
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function exit(
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address,
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uint,
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address,
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uint
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) external;
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function quit(uint, address) external;
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function enter(address, uint) external;
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function shift(uint, uint) external;
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}
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interface VatLike {
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function can(address, address) external view returns (uint);
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function ilks(bytes32) external view returns (uint, uint, uint, uint, uint);
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function dai(address) external view returns (uint);
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function urns(bytes32, address) external view returns (uint, uint);
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function frob(
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bytes32,
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address,
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address,
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address,
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int,
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int
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) external;
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function hope(address) external;
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function move(address, address, uint) external;
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}
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interface GemJoinLike {
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function dec() external returns (uint);
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function gem() external returns (GemLike);
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function join(address, uint) external payable;
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function exit(address, uint) external;
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}
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interface GNTJoinLike {
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function bags(address) external view returns (address);
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function make(address) external returns (address);
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}
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interface DaiJoinLike {
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function vat() external returns (VatLike);
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function dai() external returns (GemLike);
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function join(address, uint) external payable;
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function exit(address, uint) external;
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}
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interface TokenInterface {
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function allowance(address, address) external view returns (uint);
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function balanceOf(address) external view returns (uint);
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function approve(address, uint) external;
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function transfer(address, uint) external returns (bool);
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function transferFrom(address, address, uint) external returns (bool);
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function deposit() external payable;
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function withdraw(uint) external;
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}
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contract DSMath {
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function add(uint x, uint y) internal pure returns (uint z) {
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require((z = x + y) >= x, "math-not-safe");
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}
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function sub(uint x, uint y) internal pure returns (uint z) {
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z = x - y <= x ? x - y : 0;
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}
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function mul(uint x, uint y) internal pure returns (uint z) {
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require(y == 0 || (z = x * y) / y == x, "math-not-safe");
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}
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uint constant WAD = 10 ** 18;
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uint constant RAY = 10 ** 27;
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function rmul(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, y), RAY / 2) / RAY;
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}
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function wmul(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, y), WAD / 2) / WAD;
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}
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function rdiv(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, RAY), y / 2) / y;
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}
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function wdiv(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, WAD), y / 2) / y;
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}
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function toInt(uint x) internal pure returns (int y) {
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y = int(x);
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require(y >= 0, "int-overflow");
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}
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function toRad(uint wad) internal pure returns (uint rad) {
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rad = mul(wad, 10 ** 27);
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}
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}
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contract Helpers is DSMath {
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/**
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* @dev get MakerDAO CDP engine
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*/
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function getSaiTubAddress() public pure returns (address sai) {
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sai = 0x448a5065aeBB8E423F0896E6c5D525C040f59af3;
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}
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/**
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* @dev get uniswap MKR exchange
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*/
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function getUniswapMKRExchange() public pure returns (address ume) {
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ume = 0x2C4Bd064b998838076fa341A83d007FC2FA50957;
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}
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/**
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* @dev get uniswap DAI exchange
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*/
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function getUniswapDAIExchange() public pure returns (address ude) {
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ude = 0x09cabEC1eAd1c0Ba254B09efb3EE13841712bE14;
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}
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/**
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* @dev get CDP bytes by CDP ID
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*/
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function getCDPBytes(uint cdpNum) public pure returns (bytes32 cup) {
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cup = bytes32(cdpNum);
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}
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}
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contract CDPResolver is Helpers {
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function open(address manager) public returns (uint cdp) {
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bytes32 ilk = 0x4554482d41000000000000000000000000000000000000000000000000000000;
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cdp = ManagerLike(manager).open(ilk);
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}
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function lockETH(
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address manager,
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address ethJoin,
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uint cdp
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) public payable
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{
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// Receives ETH amount, converts it to WETH and joins it into the vat
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GemJoinLike(ethJoin).gem().deposit.value(msg.value)();
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// Approves adapter to take the WETH amount
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GemJoinLike(ethJoin).gem().approve(address(ethJoin), msg.value);
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// Joins WETH collateral into the vat
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GemJoinLike(ethJoin).join(address(this), msg.value);
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// Locks WETH amount into the CDP
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VatLike(ManagerLike(manager).vat()).frob(
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ManagerLike(manager).ilks(cdp),
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ManagerLike(manager).urns(cdp),
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address(this),
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address(this),
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int(msg.value),
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0
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);
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}
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function freeETH(
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address manager,
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address ethJoin,
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uint cdp,
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uint wad
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) public
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{
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// Unlocks WETH amount from the CDP
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ManagerLike(manager).frob(
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cdp,
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address(this),
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-int(wad),
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0
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);
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// Exits WETH amount to proxy address as a token
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GemJoinLike(ethJoin).exit(address(this), wad);
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// Converts WETH to ETH
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GemJoinLike(ethJoin).gem().withdraw(wad);
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// Sends ETH back to the user's wallet
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msg.sender.transfer(wad);
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}
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function draw(
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address manager,
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address jug,
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address daiJoin,
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uint cdp,
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uint wad
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) public
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{
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address urn = ManagerLike(manager).urns(cdp);
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address vat = ManagerLike(manager).vat();
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bytes32 ilk = ManagerLike(manager).ilks(cdp);
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// Updates stability fee rate before generating new debt
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JugLike(jug).drip(ilk);
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// Generates debt in the CDP
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int dart;
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// Gets actual rate from the vat
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(, uint rate,,,) = VatLike(vat).ilks(ilk);
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// Gets DAI balance of the urn in the vat
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uint dai = VatLike(vat).dai(urn);
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// If there was already enough DAI in the vat balance, just exits it without adding more debt
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if (dai < mul(wad, RAY)) {
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// Calculates the needed dart so together with the existing dai in the vat is enough to exit wad amount of DAI tokens
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dart = int(sub(mul(wad, RAY), dai) / rate);
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// This is neeeded due lack of precision. It might need to sum an extra dart wei (for the given DAI wad amount)
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dart = mul(uint(dart), rate) < mul(wad, RAY) ? dart + 1 : dart;
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}
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ManagerLike(manager).frob(cdp, 0, dart);
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// Moves the DAI amount (balance in the vat in rad) to proxy's address
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ManagerLike(manager).move(cdp, address(this), toRad(wad));
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// Allows adapter to access to proxy's DAI balance in the vat
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if (VatLike(vat).can(address(this), address(daiJoin)) == 0) {
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VatLike(vat).hope(daiJoin);
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}
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// Exits DAI to the user's wallet as a token
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DaiJoinLike(daiJoin).exit(msg.sender, wad);
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}
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function wipe (
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address manager,
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address daiJoin,
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uint cdp,
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uint wad
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) public
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{
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address vat = ManagerLike(manager).vat();
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address urn = ManagerLike(manager).urns(cdp);
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bytes32 ilk = ManagerLike(manager).ilks(cdp);
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address own = ManagerLike(manager).owns(cdp);
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DaiJoinLike(daiJoin).dai().transferFrom(msg.sender, address(this), wad);
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// Approves adapter to take the DAI amount
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DaiJoinLike(daiJoin).dai().approve(daiJoin, wad);
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if (own == address(this) || ManagerLike(manager).cdpCan(own, cdp, address(this)) == 1) {
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// Joins DAI amount into the vat
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DaiJoinLike(daiJoin).join(urn, wad);
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// Paybacks debt to the CDP
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ManagerLike(manager).frob(cdp, 0, _getWipeDart(
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vat,
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VatLike(vat).dai(urn),
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urn,
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ilk));
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} else {
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// Joins DAI amount into the vat
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DaiJoinLike(daiJoin).join(address(this), wad);
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// Paybacks debt to the CDP
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VatLike(vat).frob(
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ilk,
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urn,
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address(this),
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address(this),
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0,
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_getWipeDart(
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vat,
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wad * RAY,
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urn,
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ilk)
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);
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}
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}
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function _getWipeDart(
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address vat,
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uint dai,
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address urn,
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bytes32 ilk
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) internal view returns (int dart)
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{
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// Gets actual rate from the vat
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(, uint rate,,,) = VatLike(vat).ilks(ilk);
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// Gets actual art value of the urn
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(, uint art) = VatLike(vat).urns(ilk, urn);
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// Uses the whole dai balance in the vat to reduce the debt
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dart = toInt(dai / rate);
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// Checks the calculated dart is not higher than urn.art (total debt), otherwise uses its value
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dart = uint(dart) <= art ? - dart : - toInt(art);
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}
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}
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contract InstaMaker is CDPResolver {
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function() external payable {}
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}
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