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new liquidity modal done

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This commit is contained in:
Samyak Jain 2019-09-23 22:07:58 -07:00
parent 8c2bdbc842
commit e3cc78e45b
1 changed files with 53 additions and 125 deletions
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178
contracts/bridges/Liquidity.sol
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@ -29,6 +29,7 @@ interface CTokenInterface {
function balanceOf(address) external view returns (uint);
function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
function borrowBalanceCurrent(address account) external returns (uint);
function underlying() external view returns (address);
}
interface CETHInterface {
@ -107,7 +108,6 @@ contract Helper is DSMath {
contract ProvideLiquidity is Helper {
mapping (address => mapping (address => uint)) public deposits;
mapping (address => uint) public totalDeposits;
event LogDepositToken(address tknAddr, address ctknAddr, uint amt);
event LogWithdrawToken(address tknAddr, address ctknAddr, uint amt);
@ -116,69 +116,57 @@ contract ProvideLiquidity is Helper {
/**
* @dev Deposit Token for liquidity
* TODO: remove "tknAddr" and check for msg.value
* TIP: find "underlying" in the cToken address
*/
function depositToken(address tknAddr, address ctknAddr, uint amt) public payable {
if (tknAddr != ethAddr) {
ERC20Interface tknContract = ERC20Interface(tknAddr);
require(tknContract.transferFrom(msg.sender, address(this), amt), "Not enough tkn to deposit");
function depositToken(address ctknAddr, uint amt) public payable {
if (ctknAddr != cEth) {
CTokenInterface cTokenContract = CTokenInterface(ctknAddr);
uint intialBal = tknContract.balanceOf(address(this));
address tknAddr = cTokenContract.underlying();
require(ERC20Interface(tknAddr).transferFrom(msg.sender, address(this), amt), "Not enough tkn to deposit");
assert(cTokenContract.mint(amt) == 0);
uint finalBal = tknContract.balanceOf(address(this));
assert(intialBal != finalBal);
uint exchangeRate = cTokenContract.exchangeRateCurrent();
uint cTknAmt = wdiv(amt, exchangeRate);
cTknAmt = wmul(cTknAmt, exchangeRate) <= amt ? cTknAmt : cTknAmt - 1;
deposits[msg.sender][ctknAddr] += cTknAmt;
totalDeposits[ctknAddr] += cTknAmt;
emit LogDepositToken(tknAddr, ctknAddr, amt);
emit LogDepositCToken(ctknAddr, cTknAmt);
} else {
CETHInterface cEthContract = CETHInterface(ctknAddr);
uint intialBal = address(this).balance;
cEthContract.mint.value(msg.value)();
uint finalBal = address(this).balance;
assert(intialBal != finalBal);
uint exchangeRate = cEthContract.exchangeRateCurrent();
uint cEthAmt = wdiv(msg.value, exchangeRate);
cEthAmt = wmul(cEthAmt, exchangeRate) <= msg.value ? cEthAmt : cEthAmt - 1;
deposits[msg.sender][ctknAddr] += cEthAmt;
totalDeposits[ctknAddr] += cEthAmt;
emit LogDepositToken(tknAddr, ctknAddr, msg.value);
emit LogDepositCToken(ctknAddr, cEthAmt);
}
}
/**
* @dev Withdraw Token from liquidity
*/
function withdrawToken(address tknAddr, address ctknAddr, uint amt) public {
function withdrawToken(address ctknAddr, uint amt) public {
require(deposits[msg.sender][ctknAddr] != 0, "Nothing to Withdraw");
CTokenInterface cTokenContract = CTokenInterface(ctknAddr);
uint exchangeRate = cTokenContract.exchangeRateCurrent();
uint withdrawAmt = wdiv(amt, exchangeRate);
uint tknAmt = amt;
if (withdrawAmt > deposits[msg.sender][ctknAddr]) {
withdrawAmt = deposits[msg.sender][ctknAddr] - 1;
withdrawAmt = deposits[msg.sender][ctknAddr];
tknAmt = wmul(withdrawAmt, exchangeRate);
}
if (tknAddr != ethAddr) {
if (ctknAddr != cEth) {
address tknAddr = cTokenContract.underlying();
ERC20Interface tknContract = ERC20Interface(tknAddr);
uint initialTknBal = tknContract.balanceOf(address(this));
require(cTokenContract.redeemUnderlying(tknAmt) == 0, "something went wrong");
uint finalTknBal = tknContract.balanceOf(address(this));
assert(initialTknBal != finalTknBal);
require(cTokenContract.redeem(withdrawAmt) == 0, "something went wrong");
uint tknBal = tknContract.balanceOf(address(this));
tknAmt = tknAmt < tknBal ? tknAmt : tknBal;
require(ERC20Interface(tknAddr).transfer(msg.sender, tknAmt), "not enough tkn to Transfer");
} else {
uint initialTknBal = address(this).balance;
require(cTokenContract.redeemUnderlying(tknAmt) == 0, "something went wrong");
uint finalTknBal = address(this).balance;
assert(initialTknBal != finalTknBal);
require(cTokenContract.redeem(withdrawAmt) == 0, "something went wrong");
uint tknBal = address(this).balance;
tknAmt = tknAmt < tknBal ? tknAmt : tknBal;
msg.sender.transfer(tknAmt);
}
deposits[msg.sender][ctknAddr] -= withdrawAmt;
totalDeposits[ctknAddr] -= withdrawAmt;
emit LogWithdrawToken(tknAddr, ctknAddr, tknAmt);
emit LogWithdrawCToken(ctknAddr, withdrawAmt);
}
/**
@ -187,7 +175,6 @@ contract ProvideLiquidity is Helper {
function depositCTkn(address ctknAddr, uint amt) public {
require(CTokenInterface(ctknAddr).transferFrom(msg.sender, address(this), amt), "Nothing to deposit");
deposits[msg.sender][ctknAddr] += amt;
totalDeposits[ctknAddr] += amt;
emit LogDepositCToken(ctknAddr, amt);
}
@ -199,7 +186,6 @@ contract ProvideLiquidity is Helper {
uint withdrawAmt = amt < deposits[msg.sender][ctknAddr] ? amt : deposits[msg.sender][ctknAddr];
assert(CTokenInterface(ctknAddr).transfer(msg.sender, withdrawAmt));
deposits[msg.sender][ctknAddr] -= withdrawAmt;
totalDeposits[ctknAddr] -= withdrawAmt;
emit LogWithdrawCToken(ctknAddr, withdrawAmt);
}
@ -228,104 +214,72 @@ contract AccessLiquidity is ProvideLiquidity {
/**
* @dev Redeem CTokens and use them on InstaDApp's contract wallets
*/
function redeemTknAndTransfer(address tknAddr, address ctknAddr, uint tknAmt) public isUserWallet {
function redeemTknAndTransfer(address ctknAddr, uint tknAmt) public isUserWallet {
if (tknAmt > 0) {
if (tknAddr != ethAddr) {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
ERC20Interface tknContract = ERC20Interface(tknAddr);
uint initialTknBal = tknContract.balanceOf(address(this));
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
if (ctknAddr != cEth) {
address tknAddr = ctknContract.underlying();
assert(ctknContract.redeemUnderlying(tknAmt) == 0);
uint finalTknBal = tknContract.balanceOf(address(this));
assert(initialTknBal != finalTknBal);
assert(tknContract.transfer(msg.sender, tknAmt));
assert(ERC20Interface(tknAddr).transfer(msg.sender, tknAmt));
emit LogRedeemTknAndTransfer(tknAddr, ctknAddr, tknAmt);
} else {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
uint initialTknBal = address(this).balance;
assert(ctknContract.redeemUnderlying(tknAmt) == 0);
uint finalTknBal = address(this).balance;
assert(initialTknBal != finalTknBal);
msg.sender.transfer(tknAmt);
emit LogRedeemTknAndTransfer(ethAddr, ctknAddr, tknAmt);
}
emit LogRedeemTknAndTransfer(tknAddr, ctknAddr, tknAmt);
}
}
/**
* @dev Mint back redeemed tokens
*/
function mintTknBack(address tknAddr, address ctknAddr, uint tknAmt) public payable isUserWallet {
mintCTkn(tknAddr, ctknAddr, tknAmt);
function mintTknBack(address ctknAddr, uint tknAmt) public payable isUserWallet {
if (tknAmt > 0) {
if (ctknAddr != cEth) {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
address tknAddr = ctknContract.underlying();
assert(ctknContract.mint(tknAmt) == 0);
emit LogMintTknBack(tknAddr, ctknAddr, tknAmt);
} else {
CETHInterface(ctknAddr).mint.value(tknAmt)();
emit LogMintTknBack(ethAddr, ctknAddr, tknAmt);
}
}
}
/**
* @dev Borrow tokens and use them on InstaDApp's contract wallets
*/
function borrowTknAndTransfer(address tknAddr, address ctknAddr, uint tknAmt) public isUserWallet {
function borrowTknAndTransfer(address ctknAddr, uint tknAmt) public isUserWallet {
if (tknAmt > 0) {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
if (tknAddr != ethAddr) {
ERC20Interface tknContract = ERC20Interface(tknAddr);
uint initialBal = tknContract.balanceOf(address(this));
if (ctknAddr != cEth) {
address tknAddr = ctknContract.underlying();
assert(ctknContract.borrow(tknAmt) == 0);
uint finalBal = tknContract.balanceOf(address(this));
assert(initialBal != finalBal);
assert(tknContract.transfer(msg.sender, tknAmt));
assert(ERC20Interface(tknAddr).transfer(msg.sender, tknAmt));
emit LogBorrowTknAndTransfer(tknAddr, ctknAddr, tknAmt);
} else {
uint initialBal = address(this).balance;
assert(ctknContract.borrow(tknAmt) == 0);
uint finalBal = address(this).balance;
assert(initialBal != finalBal);
msg.sender.transfer(tknAmt);
emit LogBorrowTknAndTransfer(ethAddr, ctknAddr, tknAmt);
}
emit LogBorrowTknAndTransfer(tknAddr, ctknAddr, tknAmt);
}
}
/**
* @dev Payback borrow tokens
*/
function payBorrowBack(address tknAddr, address ctknAddr, uint tknAmt) public payable isUserWallet {
function payBorrowBack(address ctknAddr, uint tknAmt) public payable isUserWallet {
if (tknAmt > 0) {
if (tknAddr != ethAddr) {
ERC20Interface tknContract = ERC20Interface(tknAddr);
if (ctknAddr != cEth) {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
uint borrowBal = ctknContract.borrowBalanceCurrent(address(this));
uint initialBal = tknContract.balanceOf(address(this));
assert(ctknContract.repayBorrow(borrowBal) == 0);
uint finalBal = tknContract.balanceOf(address(this));
assert(initialBal != finalBal);
emit LogPayBorrowBack(tknAddr, ctknAddr, borrowBal);
address tknAddr = ctknContract.underlying();
assert(ctknContract.repayBorrow(tknAmt) == 0);
emit LogPayBorrowBack(tknAddr, ctknAddr, tknAmt);
} else {
CETHInterface cEthContract = CETHInterface(ctknAddr);
uint borrowBal = cEthContract.borrowBalanceCurrent(address(this));
uint initialBal = address(this).balance;
cEthContract.repayBorrow.value(borrowBal);
uint finalBal = address(this).balance;
assert(initialBal != finalBal);
emit LogPayBorrowBack(tknAddr, ctknAddr, borrowBal);
}
}
}
function mintCTkn(address tknAddr, address ctknAddr, uint tknAmt) internal {
if (tknAmt > 0) {
if (tknAddr != ethAddr) {
CTokenInterface ctknContract = CTokenInterface(ctknAddr);
ERC20Interface tknContract = ERC20Interface(tknAddr);
uint tknBal = tknContract.balanceOf(address(this));
assert(tknBal >= tknAmt);
assert(ctknContract.mint(tknBal) == 0);
uint finalTknBal = tknContract.balanceOf(address(this));
assert(tknBal != finalTknBal);
emit LogMintTknBack(tknAddr, ctknAddr, tknBal);
} else {
CETHInterface cEthContract = CETHInterface(ctknAddr);
uint tknBal = address(this).balance;
assert(tknBal >= tknAmt);
cEthContract.mint.value(tknBal)();
uint finalTknBal = address(this).balance;
assert(tknBal != finalTknBal);
emit LogMintTknBack(tknAddr, ctknAddr, tknBal);
cEthContract.repayBorrow.value(tknAmt);
emit LogPayBorrowBack(ethAddr, ctknAddr, tknAmt);
}
}
}
@ -347,39 +301,13 @@ contract AdminStuff is AccessLiquidity {
}
}
/**
* collect unmapped CToken
*/
function collectCTokens(address ctkn) public {
require(msg.sender == adminOne || msg.sender == adminTwo, "Not admin address");
CTokenInterface cTokenContract = CTokenInterface(ctkn);
uint cTokenBal = cTokenContract.balanceOf(address(this));
uint withdrawAmt = sub(cTokenBal, totalDeposits[ctkn]);
require(cTokenContract.transfer(msg.sender, withdrawAmt), "CToken Transfer failed");
}
/**
* (HIGHLY UNLIKELY TO HAPPEN)
* collecting Tokens/ETH other than CTokens
* collecting ETH if this contract has it
*/
function collectTokens(address token) public {
function collectEth() public {
require(msg.sender == adminOne || msg.sender == adminTwo, "Not admin address");
assert(isCToken[token] == false);
if (token == ethAddr) {
msg.sender.transfer(address(this).balance);
} else {
ERC20Interface tokenContract = ERC20Interface(token);
uint tokenBal = tokenContract.balanceOf(address(this));
require(tokenContract.transfer(msg.sender, tokenBal), "Transfer failed");
}
}
/**
* @dev Mint back redeemed tokens
*/
function mintCollectedTkns(address tknAddr, address ctknAddr, uint tknAmt) public payable {
require(msg.sender == adminOne || msg.sender == adminTwo, "Not admin address");
mintCTkn(tknAddr, ctknAddr, tknAmt);
msg.sender.transfer(address(this).balance);
}
/**