Contract Name:
ConnectV2AaveV3Arbitrum
Contract Source Code:
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
/**
* @title Aave v3.
* @dev Lending & Borrowing.
*/
import { TokenInterface } from "../../../common/interfaces.sol";
import { Stores } from "../../../common/stores.sol";
import { Helpers } from "./helpers.sol";
import { Events } from "./events.sol";
import { AaveInterface, DTokenInterface } from "./interface.sol";
abstract contract AaveResolver is Events, Helpers {
/**
* @dev Deposit ETH/ERC20_Token.
* @notice Deposit a token to Aave v2 for lending / collaterization.
* @param token The address of the token to deposit.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens deposited.
*/
function deposit(
address token,
uint256 amt,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
if (isEth) {
_amt = _amt == uint256(-1) ? address(this).balance : _amt;
convertEthToWeth(isEth, tokenContract, _amt);
} else {
_amt = _amt == uint256(-1)
? tokenContract.balanceOf(address(this))
: _amt;
}
approve(tokenContract, address(aave), _amt);
aave.supply(_token, _amt, address(this), referralCode);
if (!getIsColl(_token)) {
aave.setUserUseReserveAsCollateral(_token, true);
}
setUint(setId, _amt);
_eventName = "LogDeposit(address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, getId, setId);
}
/**
* @dev Deposit ETH/ERC20_Token without collateral
* @notice Deposit a token to Aave v3 without enabling it as collateral.
* @param token The address of the token to deposit.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to deposit. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens deposited.
*/
function depositWithoutCollateral(
address token,
uint256 amt,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
if (isEth) {
_amt = _amt == uint256(-1) ? address(this).balance : _amt;
convertEthToWeth(isEth, tokenContract, _amt);
} else {
_amt = _amt == uint256(-1)
? tokenContract.balanceOf(address(this))
: _amt;
}
approve(tokenContract, address(aave), _amt);
aave.supply(_token, _amt, address(this), referralCode);
if (getCollateralBalance(_token) > 0 && getIsColl(_token)) {
aave.setUserUseReserveAsCollateral(_token, false);
}
setUint(setId, _amt);
_eventName = "LogDepositWithoutCollateral(address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, getId, setId);
}
/**
* @dev Withdraw ETH/ERC20_Token.
* @notice Withdraw deposited token from Aave v2
* @param token The address of the token to withdraw.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to withdraw. (For max: `uint256(-1)`)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens withdrawn.
*/
function withdraw(
address token,
uint256 amt,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
uint256 initialBal = tokenContract.balanceOf(address(this));
aave.withdraw(_token, _amt, address(this));
uint256 finalBal = tokenContract.balanceOf(address(this));
_amt = sub(finalBal, initialBal);
convertWethToEth(isEth, tokenContract, _amt);
setUint(setId, _amt);
_eventName = "LogWithdraw(address,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, getId, setId);
}
/**
* @dev Borrow ETH/ERC20_Token.
* @notice Borrow a token using Aave v2
* @param token The address of the token to borrow.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to borrow.
* @param rateMode The type of debt. (For Stable: 1, Variable: 2)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens borrowed.
*/
function borrow(
address token,
uint256 amt,
uint256 rateMode,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
aave.borrow(_token, _amt, rateMode, referralCode, address(this));
convertWethToEth(isEth, TokenInterface(_token), _amt);
setUint(setId, _amt);
_eventName = "LogBorrow(address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
}
/**
* @dev Borrow ETH/ERC20_Token on behalf of a user.
* @notice Borrow a token using Aave v3 on behalf of a user
* @param token The address of the token to borrow.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to borrow.
* @param rateMode The type of debt. (For Stable: 1, Variable: 2)
* @param onBehalfOf The user who will incur the debt
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens borrowed.
*/
function borrowOnBehalfOf(
address token,
uint256 amt,
uint256 rateMode,
address onBehalfOf,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
aave.borrow(_token, _amt, rateMode, referralCode, onBehalfOf);
convertWethToEth(isEth, TokenInterface(_token), _amt);
setUint(setId, _amt);
_eventName = "LogBorrowOnBehalfOf(address,uint256,uint256,address,uint256,uint256)";
_eventParam = abi.encode(
token,
_amt,
rateMode,
onBehalfOf,
getId,
setId
);
}
/**
* @dev Payback borrowed ETH/ERC20_Token.
* @notice Payback debt owed.
* @param token The address of the token to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to payback. (For max: `uint256(-1)`)
* @param rateMode The type of debt paying back. (For Stable: 1, Variable: 2)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens paid back.
*/
function payback(
address token,
uint256 amt,
uint256 rateMode,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
_amt = _amt == uint256(-1) ? getPaybackBalance(_token, rateMode) : _amt;
if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
approve(tokenContract, address(aave), _amt);
aave.repay(_token, _amt, rateMode, address(this));
setUint(setId, _amt);
_eventName = "LogPayback(address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
}
/**
* @dev Payback borrowed ETH/ERC20_Token using aTokens.
* @notice Repays a borrowed `amount` on a specific reserve using the reserve aTokens, burning the equivalent debt tokens.
* @param token The address of the token to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to payback. (For max: `uint256(-1)`)
* @param rateMode The type of debt paying back. (For Stable: 1, Variable: 2)
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens paid back.
*/
function paybackWithATokens(
address token,
uint256 amt,
uint256 rateMode,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
_amt = _amt == uint256(-1) ? getPaybackBalance(_token, rateMode) : _amt;
if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
approve(tokenContract, address(aave), _amt);
aave.repayWithATokens(_token, _amt, rateMode);
setUint(setId, _amt);
_eventName = "LogPayback(address,uint256,uint256,uint256,uint256)";
_eventParam = abi.encode(token, _amt, rateMode, getId, setId);
}
/**
* @dev Payback borrowed ETH/ERC20_Token on behalf of a user.
* @notice Payback debt owed on behalf os a user.
* @param token The address of the token to payback.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param amt The amount of the token to payback. (For max: `uint256(-1)`)
* @param rateMode The type of debt paying back. (For Stable: 1, Variable: 2)
* @param onBehalfOf Address of user who's debt to repay.
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens paid back.
*/
function paybackOnBehalfOf(
address token,
uint256 amt,
uint256 rateMode,
address onBehalfOf,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _amt = getUint(getId, amt);
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
TokenInterface tokenContract = TokenInterface(_token);
_amt = _amt == uint256(-1)
? getOnBehalfOfPaybackBalance(_token, rateMode, onBehalfOf)
: _amt;
if (isEth) convertEthToWeth(isEth, tokenContract, _amt);
approve(tokenContract, address(aave), _amt);
aave.repay(_token, _amt, rateMode, onBehalfOf);
setUint(setId, _amt);
_eventName = "LogPaybackOnBehalfOf(address,uint256,uint256,address,uint256,uint256)";
_eventParam = abi.encode(
token,
_amt,
rateMode,
onBehalfOf,
getId,
setId
);
}
/**
* @dev Enable collateral
* @notice Enable an array of tokens as collateral
* @param tokens Array of tokens to enable collateral
*/
function enableCollateral(address[] calldata tokens)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _length = tokens.length;
require(_length > 0, "0-tokens-not-allowed");
AaveInterface aave = AaveInterface(aaveProvider.getPool());
for (uint256 i = 0; i < _length; i++) {
bool isEth = tokens[i] == ethAddr;
address _token = isEth ? wethAddr : tokens[i];
if (getCollateralBalance(_token) > 0 && !getIsColl(_token)) {
aave.setUserUseReserveAsCollateral(_token, true);
}
}
_eventName = "LogEnableCollateral(address[])";
_eventParam = abi.encode(tokens);
}
/**
* @dev Disable collateral
* @notice Disable an array of tokens as collateral
* @param tokens Array of tokens to disable as collateral
*/
function disableCollateral(address[] calldata tokens)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
uint256 _length = tokens.length;
require(_length > 0, "0-tokens-not-allowed");
AaveInterface aave = AaveInterface(aaveProvider.getPool());
for (uint256 i = 0; i < _length; i++) {
bool isEth = tokens[i] == ethAddr;
address _token = isEth ? wethAddr : tokens[i];
if (getCollateralBalance(_token) > 0 && getIsColl(_token)) {
aave.setUserUseReserveAsCollateral(_token, false);
}
}
_eventName = "LogDisableCollateral(address[])";
_eventParam = abi.encode(tokens);
}
/**
* @dev Swap borrow rate mode
* @notice Swaps user borrow rate mode between variable and stable
* @param token The address of the token to swap borrow rate.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param rateMode current rate mode. (Stable = 1, Variable = 2)
*/
function swapBorrowRateMode(address token, uint256 rateMode)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
AaveInterface aave = AaveInterface(aaveProvider.getPool());
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
if (getPaybackBalance(_token, rateMode) > 0) {
aave.swapBorrowRateMode(_token, rateMode);
}
_eventName = "LogSwapRateMode(address,uint256)";
_eventParam = abi.encode(token, rateMode);
}
/**
* @dev Set user e-mode
* @notice Updates the user's e-mode category
* @param categoryId The category Id of the e-mode user want to set
*/
function setUserEMode(uint8 categoryId)
external
returns (string memory _eventName, bytes memory _eventParam)
{
AaveInterface aave = AaveInterface(aaveProvider.getPool());
aave.setUserEMode(categoryId);
_eventName = "LogSetUserEMode(uint8)";
_eventParam = abi.encode(categoryId);
}
/**
* @dev Approve Delegation
* @notice Gives approval to delegate debt tokens
* @param token The address of token
* @param amount The amount
* @param rateMode The type of debt
* @param delegateTo The address to whom the user is delegating
* @param getId ID to retrieve amt.
* @param setId ID stores the amount of tokens delegated.
*/
function delegateBorrow(
address token,
uint256 amount,
uint256 rateMode,
address delegateTo,
uint256 getId,
uint256 setId
)
external
payable
returns (string memory _eventName, bytes memory _eventParam)
{
require(rateMode == 1 || rateMode == 2, "Invalid debt type");
uint256 _amt = getUint(getId, amount);
bool isEth = token == ethAddr;
address _token = isEth ? wethAddr : token;
address _dToken = getDTokenAddr(_token, rateMode);
DTokenInterface(_dToken).approveDelegation(delegateTo, _amt);
setUint(setId, _amt);
_eventName = "LogDelegateBorrow(address,uint256,uint256,address,uint256,uint256)";
_eventParam = abi.encode(
token,
_amt,
rateMode,
delegateTo,
getId,
setId
);
}
}
contract ConnectV2AaveV3Arbitrum is AaveResolver {
string public constant name = "AaveV3-v1.2";
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
pragma abicoder v2;
interface TokenInterface {
function approve(address, uint256) external;
function transfer(address, uint) external;
function transferFrom(address, address, uint) external;
function deposit() external payable;
function withdraw(uint) external;
function balanceOf(address) external view returns (uint);
function decimals() external view returns (uint);
}
interface MemoryInterface {
function getUint(uint id) external returns (uint num);
function setUint(uint id, uint val) external;
}
interface InstaMapping {
function cTokenMapping(address) external view returns (address);
function gemJoinMapping(bytes32) external view returns (address);
}
interface AccountInterface {
function enable(address) external;
function disable(address) external;
function isAuth(address) external view returns (bool);
}
interface InstaConnectors {
function isConnectors(string[] calldata) external returns (bool, address[] memory);
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { MemoryInterface, InstaMapping } from "./interfaces.sol";
abstract contract Stores {
/**
* @dev Return ethereum address
*/
address constant internal ethAddr = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
/**
* @dev Return Wrapped ETH address
*/
address constant internal wethAddr = 0x82aF49447D8a07e3bd95BD0d56f35241523fBab1;
/**
* @dev Return memory variable address
*/
MemoryInterface constant internal instaMemory = MemoryInterface(0xc109f7Ef06152c3a63dc7254fD861E612d3Ac571);
/**
* @dev Get Uint value from InstaMemory Contract.
*/
function getUint(uint getId, uint val) internal returns (uint returnVal) {
returnVal = getId == 0 ? val : instaMemory.getUint(getId);
}
/**
* @dev Set Uint value in InstaMemory Contract.
*/
function setUint(uint setId, uint val) virtual internal {
if (setId != 0) instaMemory.setUint(setId, val);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { DSMath } from "../../../common/math.sol";
import { Basic } from "../../../common/basic.sol";
import { AavePoolProviderInterface, AaveDataProviderInterface } from "./interface.sol";
abstract contract Helpers is DSMath, Basic {
/**
* @dev Aave Pool Provider
*/
AavePoolProviderInterface internal constant aaveProvider =
AavePoolProviderInterface(0xa97684ead0e402dC232d5A977953DF7ECBaB3CDb); // Arbitrum address - PoolAddressesProvider
/**
* @dev Aave Pool Data Provider
*/
AaveDataProviderInterface internal constant aaveData =
AaveDataProviderInterface(0x69FA688f1Dc47d4B5d8029D5a35FB7a548310654); //Arbitrum address - PoolDataProvider
/**
* @dev Aave Referral Code
*/
uint16 internal constant referralCode = 3228;
/**
* @dev Checks if collateral is enabled for an asset
* @param token token address of the asset.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
*/
function getIsColl(address token) internal view returns (bool isCol) {
(, , , , , , , , isCol) = aaveData.getUserReserveData(
token,
address(this)
);
}
/**
* @dev Get total debt balance & fee for an asset
* @param token token address of the debt.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param rateMode Borrow rate mode (Stable = 1, Variable = 2)
*/
function getPaybackBalance(address token, uint256 rateMode)
internal
view
returns (uint256)
{
(, uint256 stableDebt, uint256 variableDebt, , , , , , ) = aaveData
.getUserReserveData(token, address(this));
return rateMode == 1 ? stableDebt : variableDebt;
}
/**
* @dev Get OnBehalfOf user's total debt balance & fee for an asset
* @param token token address of the debt.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
* @param rateMode Borrow rate mode (Stable = 1, Variable = 2)
*/
function getOnBehalfOfPaybackBalance(address token, uint256 rateMode, address onBehalfOf)
internal
view
returns (uint256)
{
(, uint256 stableDebt, uint256 variableDebt, , , , , , ) = aaveData
.getUserReserveData(token, onBehalfOf);
return rateMode == 1 ? stableDebt : variableDebt;
}
/**
* @dev Get total collateral balance for an asset
* @param token token address of the collateral.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
*/
function getCollateralBalance(address token)
internal
view
returns (uint256 bal)
{
(bal, , , , , , , , ) = aaveData.getUserReserveData(
token,
address(this)
);
}
/**
* @dev Get debt token address for an asset
* @param token token address of the asset
* @param rateMode Debt type: stable-1, variable-2
*/
function getDTokenAddr(address token, uint256 rateMode)
internal
view
returns(address dToken)
{
if (rateMode == 1) {
(, dToken, ) = aaveData.getReserveTokensAddresses(token);
} else {
(, , dToken) = aaveData.getReserveTokensAddresses(token);
}
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
contract Events {
event LogDeposit(
address indexed token,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogWithdraw(
address indexed token,
uint256 tokenAmt,
uint256 getId,
uint256 setId
);
event LogBorrow(
address indexed token,
uint256 tokenAmt,
uint256 indexed rateMode,
uint256 getId,
uint256 setId
);
event LogPayback(
address indexed token,
uint256 tokenAmt,
uint256 indexed rateMode,
uint256 getId,
uint256 setId
);
event LogEnableCollateral(address[] tokens);
event LogDisableCollateral(address[] tokens);
event LogSwapRateMode(address indexed token, uint256 rateMode);
event LogSetUserEMode(uint8 categoryId);
event LogDelegateBorrow(
address token,
uint256 amount,
uint256 rateMode,
address delegateTo,
uint256 getId,
uint256 setId
);
event LogDepositWithoutCollateral(
address token,
uint256 amt,
uint256 getId,
uint256 setId
);
event LogBorrowOnBehalfOf(
address token,
uint256 amt,
uint256 rateMode,
address onBehalfOf,
uint256 getId,
uint256 setId
);
event LogPaybackOnBehalfOf(
address token,
uint256 amt,
uint256 rateMode,
address onBehalfOf,
uint256 getId,
uint256 setId
);
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
interface AaveInterface {
function supply(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256);
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external;
function repay(
address asset,
uint256 amount,
uint256 interestRateMode,
address onBehalfOf
) external returns (uint256);
function repayWithATokens(
address asset,
uint256 amount,
uint256 interestRateMode
) external returns (uint256);
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral)
external;
function swapBorrowRateMode(address asset, uint256 interestRateMode)
external;
function setUserEMode(uint8 categoryId) external;
}
interface AavePoolProviderInterface {
function getPool() external view returns (address);
}
interface AaveDataProviderInterface {
function getReserveTokensAddresses(address _asset)
external
view
returns (
address aTokenAddress,
address stableDebtTokenAddress,
address variableDebtTokenAddress
);
function getUserReserveData(address _asset, address _user)
external
view
returns (
uint256 currentATokenBalance,
uint256 currentStableDebt,
uint256 currentVariableDebt,
uint256 principalStableDebt,
uint256 scaledVariableDebt,
uint256 stableBorrowRate,
uint256 liquidityRate,
uint40 stableRateLastUpdated,
bool usageAsCollateralEnabled
);
function getReserveEModeCategory(address asset)
external
view
returns (uint256);
}
interface AaveAddressProviderRegistryInterface {
function getAddressesProvidersList()
external
view
returns (address[] memory);
}
interface ATokenInterface {
function balanceOf(address _user) external view returns (uint256);
}
interface DTokenInterface {
function approveDelegation(address delegatee, uint256 amount) external;
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
contract DSMath {
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
function add(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(x, y);
}
function sub(uint x, uint y) internal virtual pure returns (uint z) {
z = SafeMath.sub(x, y);
}
function mul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.mul(x, y);
}
function div(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.div(x, y);
}
function wmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), WAD / 2) / WAD;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, WAD), y / 2) / y;
}
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, RAY), y / 2) / y;
}
function rmul(uint x, uint y) internal pure returns (uint z) {
z = SafeMath.add(SafeMath.mul(x, y), RAY / 2) / RAY;
}
function toInt(uint x) internal pure returns (int y) {
y = int(x);
require(y >= 0, "int-overflow");
}
function toRad(uint wad) internal pure returns (uint rad) {
rad = mul(wad, 10 ** 27);
}
}
//SPDX-License-Identifier: MIT
pragma solidity ^0.7.0;
import { TokenInterface } from "./interfaces.sol";
import { Stores } from "./stores.sol";
import { DSMath } from "./math.sol";
abstract contract Basic is DSMath, Stores {
function convert18ToDec(uint _dec, uint256 _amt) internal pure returns (uint256 amt) {
amt = (_amt / 10 ** (18 - _dec));
}
function convertTo18(uint _dec, uint256 _amt) internal pure returns (uint256 amt) {
amt = mul(_amt, 10 ** (18 - _dec));
}
function getTokenBal(TokenInterface token) internal view returns(uint _amt) {
_amt = address(token) == ethAddr ? address(this).balance : token.balanceOf(address(this));
}
function getTokensDec(TokenInterface buyAddr, TokenInterface sellAddr) internal view returns(uint buyDec, uint sellDec) {
buyDec = address(buyAddr) == ethAddr ? 18 : buyAddr.decimals();
sellDec = address(sellAddr) == ethAddr ? 18 : sellAddr.decimals();
}
function encodeEvent(string memory eventName, bytes memory eventParam) internal pure returns (bytes memory) {
return abi.encode(eventName, eventParam);
}
function approve(TokenInterface token, address spender, uint256 amount) internal {
try token.approve(spender, amount) {
} catch {
token.approve(spender, 0);
token.approve(spender, amount);
}
}
function changeEthAddress(address buy, address sell) internal pure returns(TokenInterface _buy, TokenInterface _sell){
_buy = buy == ethAddr ? TokenInterface(wethAddr) : TokenInterface(buy);
_sell = sell == ethAddr ? TokenInterface(wethAddr) : TokenInterface(sell);
}
function convertEthToWeth(bool isEth, TokenInterface token, uint amount) internal {
if(isEth) token.deposit{value: amount}();
}
function convertWethToEth(bool isEth, TokenInterface token, uint amount) internal {
if(isEth) {
approve(token, address(token), amount);
token.withdraw(amount);
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}