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deposit DAI function

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Samyak Jain 2019-06-08 16:36:49 +05:30
parent 98b9a64423
commit db59e27560
1 changed files with 106 additions and 0 deletions
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contracts/bridges/MakerCompound.sol Normal file
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pragma solidity ^0.5.7;
interface RegistryInterface {
function proxies(address) external view returns (address);
}
interface CTokenInterface {
function mint(uint mintAmount) external returns (uint); // For ERC20
function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); // For ERC20
function borrowBalanceCurrent(address account) external returns (uint);
function redeem(uint redeemTokens) external returns (uint);
function redeemUnderlying(uint redeemAmount) external returns (uint);
function borrow(uint borrowAmount) external returns (uint);
function liquidateBorrow(address borrower, uint repayAmount, address cTokenCollateral) external returns (uint);
function liquidateBorrow(address borrower, address cTokenCollateral) external payable;
function exchangeRateCurrent() external returns (uint);
function getCash() external view returns (uint);
function totalBorrowsCurrent() external returns (uint);
function borrowRatePerBlock() external view returns (uint);
function supplyRatePerBlock() external view returns (uint);
function totalReserves() external view returns (uint);
function reserveFactorMantissa() external view returns (uint);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256 balance);
function allowance(address, address) external view returns (uint);
function approve(address, uint) external;
function transfer(address, uint) external returns (bool);
function transferFrom(address, address, uint) external returns (bool);
}
interface ERC20Interface {
function allowance(address, address) external view returns (uint);
function balanceOf(address) external view returns (uint);
function approve(address, uint) external;
function transfer(address, uint) external returns (bool);
function transferFrom(address, address, uint) external returns (bool);
}
contract DSMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, "math-not-safe");
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, "math-not-safe");
}
uint constant WAD = 10 ** 18;
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
}
contract Helper is DSMath {
address public admin = 0x7284a8451d9a0e7Dc62B3a71C0593eA2eC5c5638;
address public dai = 0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359;
address public cDai = 0xF5DCe57282A584D2746FaF1593d3121Fcac444dC;
mapping (address => uint) deposited; // Amount of CToken deposited
/**
* @dev setting allowance to compound for the "user proxy" if required
*/
function setApproval(address erc20, uint srcAmt, address to) internal {
ERC20Interface erc20Contract = ERC20Interface(erc20);
uint tokenAllowance = erc20Contract.allowance(address(this), to);
if (srcAmt > tokenAllowance) {
erc20Contract.approve(to, 2**255);
}
}
}
contract Bridge is Helper {
function depositDAI(uint amt) public {
ERC20Interface tokenContract = ERC20Interface(dai);
uint toDeposit = tokenContract.balanceOf(msg.sender);
if (toDeposit > amt) {
toDeposit = amt;
}
tokenContract.transferFrom(msg.sender, address(this), toDeposit);
CTokenInterface cToken = CTokenInterface(cDai);
setApproval(dai, toDeposit, cDai);
assert(cToken.mint(toDeposit) == 0);
uint cTokenMinted = wdiv(toDeposit, cToken.exchangeRateCurrent());
deposited[msg.sender] += cTokenMinted;
}
function withdrawDAI(uint amt) public {
}
}