added connector on fanto,

contracts/fantom/common/basic.sol

@@ -0,0 +1,91 @@
+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(uint256 _dec, uint256 _amt)
+		internal
+		pure
+		returns (uint256 amt)
+	{
+		amt = (_amt / 10**(18 - _dec));
+	}
+
+	function convertTo18(uint256 _dec, uint256 _amt)
+		internal
+		pure
+		returns (uint256 amt)
+	{
+		amt = mul(_amt, 10**(18 - _dec));
+	}
+
+	function getTokenBal(TokenInterface token)
+		internal
+		view
+		returns (uint256 _amt)
+	{
+		_amt = address(token) == ftmAddr
+			? address(this).balance
+			: token.balanceOf(address(this));
+	}
+
+	function getTokensDec(TokenInterface buyAddr, TokenInterface sellAddr)
+		internal
+		view
+		returns (uint256 buyDec, uint256 sellDec)
+	{
+		buyDec = address(buyAddr) == ftmAddr ? 18 : buyAddr.decimals();
+		sellDec = address(sellAddr) == ftmAddr ? 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 changeftmAddress(address buy, address sell)
+		internal
+		pure
+		returns (TokenInterface _buy, TokenInterface _sell)
+	{
+		_buy = buy == ftmAddr ? TokenInterface(wftmAddr) : TokenInterface(buy);
+		_sell = sell == ftmAddr
+			? TokenInterface(wftmAddr)
+			: TokenInterface(sell);
+	}
+
+	function convertFtmToWftm(
+		bool isFtm,
+		TokenInterface token,
+		uint256 amount
+	) internal {
+		if (isFtm) token.deposit{ value: amount }();
+	}
+
+	function convertWftmToFtm(
+		bool isFtm,
+		TokenInterface token,
+		uint256 amount
+	) internal {
+		if (isFtm) {
+			approve(token, address(token), amount);
+			token.withdraw(amount);
+		}
+	}
+}

contracts/fantom/common/interfaces.sol

@@ -0,0 +1,35 @@
+pragma solidity ^0.7.0;
+
+interface TokenInterface {
+	function approve(address, uint256) external;
+
+	function transfer(address, uint256) external;
+
+	function transferFrom(
+		address,
+		address,
+		uint256
+	) external;
+
+	function deposit() external payable;
+
+	function withdraw(uint256) external;
+
+	function balanceOf(address) external view returns (uint256);
+
+	function decimals() external view returns (uint256);
+}
+
+interface MemoryInterface {
+	function getUint(uint256 id) external returns (uint256 num);
+
+	function setUint(uint256 id, uint256 val) external;
+}
+
+interface AccountInterface {
+	function enable(address) external;
+
+	function disable(address) external;
+
+	function isAuth(address) external view returns (bool);
+}

contracts/fantom/common/math.sol

@@ -0,0 +1,54 @@
+pragma solidity ^0.7.0;
+
+import { SafeMath } from "@openzeppelin/contracts/math/SafeMath.sol";
+
+contract DSMath {
+	uint256 constant WAD = 10**18;
+	uint256 constant RAY = 10**27;
+
+	function add(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.add(x, y);
+	}
+
+	function sub(uint256 x, uint256 y)
+		internal
+		pure
+		virtual
+		returns (uint256 z)
+	{
+		z = SafeMath.sub(x, y);
+	}
+
+	function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.mul(x, y);
+	}
+
+	function div(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.div(x, y);
+	}
+
+	function wmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.add(SafeMath.mul(x, y), WAD / 2) / WAD;
+	}
+
+	function wdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.add(SafeMath.mul(x, WAD), y / 2) / y;
+	}
+
+	function rdiv(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.add(SafeMath.mul(x, RAY), y / 2) / y;
+	}
+
+	function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
+		z = SafeMath.add(SafeMath.mul(x, y), RAY / 2) / RAY;
+	}
+
+	function toInt(uint256 x) internal pure returns (int256 y) {
+		y = int256(x);
+		require(y >= 0, "int-overflow");
+	}
+
+	function toRad(uint256 wad) internal pure returns (uint256 rad) {
+		rad = mul(wad, 10**27);
+	}
+}

contracts/fantom/common/stores.sol

@@ -0,0 +1,40 @@
+pragma solidity ^0.7.0;
+
+import { MemoryInterface } from "./interfaces.sol";
+
+abstract contract Stores {
+	/**
+	 * @dev Return FTM address
+	 */
+	address internal constant ftmAddr =
+		0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
+
+	/**
+	 * @dev Return Wrapped FTM address
+	 */
+	address internal constant wftmAddr =
+		0x21be370D5312f44cB42ce377BC9b8a0cEF1A4C83;
+
+	/**
+	 * @dev Return memory variable address
+	 */
+	MemoryInterface internal constant instaMemory =
+		MemoryInterface(0x56439117379A53bE3CC2C55217251e2481B7a1C8);
+
+	/**
+	 * @dev Get Uint value from InstaMemory Contract.
+	 */
+	function getUint(uint256 getId, uint256 val)
+		internal
+		returns (uint256 returnVal)
+	{
+		returnVal = getId == 0 ? val : instaMemory.getUint(getId);
+	}
+
+	/**
+	 * @dev Set Uint value in InstaMemory Contract.
+	 */
+	function setUint(uint256 setId, uint256 val) internal virtual {
+		if (setId != 0) instaMemory.setUint(setId, val);
+	}
+}

contracts/fantom/connectors/aave/v3-import/events.sol

@@ -0,0 +1,14 @@
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+contract Events {
+	event LogAaveV3Import(
+		address indexed user,
+		address[] ctokens,
+		string[] supplyIds,
+		string[] borrowIds,
+		uint256[] flashLoanFees,
+		uint256[] supplyAmts,
+		uint256[] borrowAmts
+	);
+}

contracts/fantom/connectors/aave/v3-import/helpers.sol

@@ -0,0 +1,286 @@
+pragma solidity ^0.7.0;
+
+import { DSMath } from "../../../common/math.sol";
+import { Basic } from "../../../common/basic.sol";
+import { TokenInterface, AccountInterface } from "../../../common/interfaces.sol";
+import { AaveInterface, AavePoolProviderInterface, AaveDataProviderInterface } from "./interface.sol";
+import "./events.sol";
+import "./interface.sol";
+
+abstract contract Helper is DSMath, Basic {
+	/**
+	 * @dev Aave referal code
+	 */
+	uint16 internal constant referalCode = 3228;
+
+	/**
+	 * @dev Aave Lending Pool Provider
+	 */
+	AavePoolProviderInterface internal constant aaveProvider =
+		AavePoolProviderInterface(0xa97684ead0e402dC232d5A977953DF7ECBaB3CDb);
+
+	/**
+	 * @dev Aave Protocol Data Provider
+	 */
+	AaveDataProviderInterface internal constant aaveData =
+		AaveDataProviderInterface(0x69FA688f1Dc47d4B5d8029D5a35FB7a548310654);
+
+	function getIsColl(address token, address user)
+		internal
+		view
+		returns (bool isCol)
+	{
+		(, , , , , , , , isCol) = aaveData.getUserReserveData(token, user);
+	}
+
+	struct ImportData {
+		address[] _supplyTokens;
+		address[] _borrowTokens;
+		ATokenInterface[] aTokens;
+		uint256[] supplyAmts;
+		uint256[] variableBorrowAmts;
+		uint256[] variableBorrowAmtsWithFee;
+		uint256[] stableBorrowAmts;
+		uint256[] stableBorrowAmtsWithFee;
+		uint256[] totalBorrowAmts;
+		uint256[] totalBorrowAmtsWithFee;
+		bool convertStable;
+	}
+
+	struct ImportInputData {
+		address[] supplyTokens;
+		address[] borrowTokens;
+		bool convertStable;
+		uint256[] flashLoanFees;
+	}
+}
+
+contract AaveHelpers is Helper {
+	function getBorrowAmount(address _token, address userAccount)
+		internal
+		view
+		returns (uint256 stableBorrow, uint256 variableBorrow)
+	{
+		(
+			,
+			address stableDebtTokenAddress,
+			address variableDebtTokenAddress
+		) = aaveData.getReserveTokensAddresses(_token);
+
+		stableBorrow = ATokenInterface(stableDebtTokenAddress).balanceOf(
+			userAccount
+		);
+		variableBorrow = ATokenInterface(variableDebtTokenAddress).balanceOf(
+			userAccount
+		);
+	}
+
+	function getBorrowAmounts(
+		address userAccount,
+		AaveInterface aave,
+		ImportInputData memory inputData,
+		ImportData memory data
+	) internal returns (ImportData memory) {
+		if (inputData.borrowTokens.length > 0) {
+			data._borrowTokens = new address[](inputData.borrowTokens.length);
+			data.variableBorrowAmts = new uint256[](
+				inputData.borrowTokens.length
+			);
+			data.variableBorrowAmtsWithFee = new uint256[](
+				inputData.borrowTokens.length
+			);
+			data.stableBorrowAmts = new uint256[](
+				inputData.borrowTokens.length
+			);
+			data.stableBorrowAmtsWithFee = new uint256[](
+				inputData.borrowTokens.length
+			);
+			data.totalBorrowAmts = new uint256[](inputData.borrowTokens.length);
+			data.totalBorrowAmtsWithFee = new uint256[](
+				inputData.borrowTokens.length
+			);
+			for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
+				for (uint256 j = i; j < inputData.borrowTokens.length; j++) {
+					if (j != i) {
+						require(
+							inputData.borrowTokens[i] !=
+								inputData.borrowTokens[j],
+							"token-repeated"
+						);
+					}
+				}
+			}
+			for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
+				address _token = inputData.borrowTokens[i] == ftmAddr
+					? wftmAddr
+					: inputData.borrowTokens[i];
+				data._borrowTokens[i] = _token;
+
+				(
+					data.stableBorrowAmts[i],
+					data.variableBorrowAmts[i]
+				) = getBorrowAmount(_token, userAccount);
+
+				if (data.variableBorrowAmts[i] != 0) {
+					data.variableBorrowAmtsWithFee[i] = add(
+						data.variableBorrowAmts[i],
+						inputData.flashLoanFees[i]
+					);
+					data.stableBorrowAmtsWithFee[i] = data.stableBorrowAmts[i];
+				} else {
+					data.stableBorrowAmtsWithFee[i] = add(
+						data.stableBorrowAmts[i],
+						inputData.flashLoanFees[i]
+					);
+				}
+
+				data.totalBorrowAmts[i] = add(
+					data.stableBorrowAmts[i],
+					data.variableBorrowAmts[i]
+				);
+				data.totalBorrowAmtsWithFee[i] = add(
+					data.stableBorrowAmtsWithFee[i],
+					data.variableBorrowAmtsWithFee[i]
+				);
+
+				if (data.totalBorrowAmts[i] > 0) {
+					uint256 _amt = data.totalBorrowAmts[i];
+					TokenInterface(_token).approve(address(aave), _amt);
+				}
+			}
+		}
+		return data;
+	}
+
+	function getSupplyAmounts(
+		address userAccount,
+		ImportInputData memory inputData,
+		ImportData memory data
+	) internal view returns (ImportData memory) {
+		data.supplyAmts = new uint256[](inputData.supplyTokens.length);
+		data._supplyTokens = new address[](inputData.supplyTokens.length);
+		data.aTokens = new ATokenInterface[](inputData.supplyTokens.length);
+
+		for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
+			for (uint256 j = i; j < inputData.supplyTokens.length; j++) {
+				if (j != i) {
+					require(
+						inputData.supplyTokens[i] != inputData.supplyTokens[j],
+						"token-repeated"
+					);
+				}
+			}
+		}
+		for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
+			address _token = inputData.supplyTokens[i] == ftmAddr
+				? wftmAddr
+				: inputData.supplyTokens[i];
+			(address _aToken, , ) = aaveData.getReserveTokensAddresses(_token);
+			data._supplyTokens[i] = _token;
+			data.aTokens[i] = ATokenInterface(_aToken);
+			data.supplyAmts[i] = data.aTokens[i].balanceOf(userAccount);
+		}
+
+		return data;
+	}
+
+	function _paybackBehalfOne(
+		AaveInterface aave,
+		address token,
+		uint256 amt,
+		uint256 rateMode,
+		address user
+	) private {
+		aave.repay(token, amt, rateMode, user);
+	}
+
+	function _PaybackStable(
+		uint256 _length,
+		AaveInterface aave,
+		address[] memory tokens,
+		uint256[] memory amts,
+		address user
+	) internal {
+		for (uint256 i = 0; i < _length; i++) {
+			if (amts[i] > 0) {
+				_paybackBehalfOne(aave, tokens[i], amts[i], 1, user);
+			}
+		}
+	}
+
+	function _PaybackVariable(
+		uint256 _length,
+		AaveInterface aave,
+		address[] memory tokens,
+		uint256[] memory amts,
+		address user
+	) internal {
+		for (uint256 i = 0; i < _length; i++) {
+			if (amts[i] > 0) {
+				_paybackBehalfOne(aave, tokens[i], amts[i], 2, user);
+			}
+		}
+	}
+
+	function _TransferAtokens(
+		uint256 _length,
+		AaveInterface aave,
+		ATokenInterface[] memory atokenContracts,
+		uint256[] memory amts,
+		address[] memory tokens,
+		address userAccount
+	) internal {
+		for (uint256 i = 0; i < _length; i++) {
+			if (amts[i] > 0) {
+				uint256 _amt = amts[i];
+				require(
+					atokenContracts[i].transferFrom(
+						userAccount,
+						address(this),
+						_amt
+					),
+					"allowance?"
+				);
+
+				if (!getIsColl(tokens[i], address(this))) {
+					aave.setUserUseReserveAsCollateral(tokens[i], true);
+				}
+			}
+		}
+	}
+
+	function _BorrowVariable(
+		uint256 _length,
+		AaveInterface aave,
+		address[] memory tokens,
+		uint256[] memory amts
+	) internal {
+		for (uint256 i = 0; i < _length; i++) {
+			if (amts[i] > 0) {
+				_borrowOne(aave, tokens[i], amts[i], 2);
+			}
+		}
+	}
+
+	function _BorrowStable(
+		uint256 _length,
+		AaveInterface aave,
+		address[] memory tokens,
+		uint256[] memory amts
+	) internal {
+		for (uint256 i = 0; i < _length; i++) {
+			if (amts[i] > 0) {
+				_borrowOne(aave, tokens[i], amts[i], 1);
+			}
+		}
+	}
+
+	function _borrowOne(
+		AaveInterface aave,
+		address token,
+		uint256 amt,
+		uint256 rateMode
+	) private {
+		aave.borrow(token, amt, rateMode, referalCode, address(this));
+	}
+}

contracts/fantom/connectors/aave/v3-import/interface.sol

@@ -0,0 +1,94 @@
+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;
+
+	function borrow(
+		address _asset,
+		uint256 _amount,
+		uint256 _interestRateMode,
+		uint16 _referralCode,
+		address _onBehalfOf
+	) external;
+
+	function repay(
+		address _asset,
+		uint256 _amount,
+		uint256 _rateMode,
+		address _onBehalfOf
+	) external;
+
+	function setUserUseReserveAsCollateral(
+		address _asset,
+		bool _useAsCollateral
+	) external;
+
+	function swapBorrowRateMode(address _asset, uint256 _rateMode) external;
+}
+
+interface ATokenInterface {
+	function scaledBalanceOf(address _user) external view returns (uint256);
+
+	function isTransferAllowed(address _user, uint256 _amount)
+		external
+		view
+		returns (bool);
+
+	function balanceOf(address _user) external view returns (uint256);
+
+	function transferFrom(
+		address,
+		address,
+		uint256
+	) external returns (bool);
+
+	function allowance(address, address) external returns (uint256);
+}
+
+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
+		);
+}
+
+interface AaveAddressProviderRegistryInterface {
+	function getAddressesProvidersList()
+		external
+		view
+		returns (address[] memory);
+}

contracts/fantom/connectors/aave/v3-import/main.sol

@@ -0,0 +1,111 @@
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+/**
+ * @title Aave v3 import connector .
+ * @dev  Import EOA's aave V3 position to DSA's aave v3 position
+ */
+
+import { TokenInterface, AccountInterface } from "../../../common/interfaces.sol";
+import { AaveInterface, ATokenInterface } from "./interface.sol";
+import "./helpers.sol";
+import "./events.sol";
+
+contract AaveV3ImportResolver is AaveHelpers {
+	function _importAave(address userAccount, ImportInputData memory inputData)
+		internal
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		require(
+			AccountInterface(address(this)).isAuth(userAccount),
+			"user-account-not-auth"
+		);
+
+		require(inputData.supplyTokens.length > 0, "0-length-not-allowed");
+
+		ImportData memory data;
+
+		AaveInterface aave = AaveInterface(aaveProvider.getPool());
+
+		data = getBorrowAmounts(userAccount, aave, inputData, data);
+		data = getSupplyAmounts(userAccount, inputData, data);
+
+		//  payback borrowed amount;
+		_PaybackStable(
+			data._borrowTokens.length,
+			aave,
+			data._borrowTokens,
+			data.stableBorrowAmts,
+			userAccount
+		);
+		_PaybackVariable(
+			data._borrowTokens.length,
+			aave,
+			data._borrowTokens,
+			data.variableBorrowAmts,
+			userAccount
+		);
+
+		//  transfer atokens to this address;
+		_TransferAtokens(
+			data._supplyTokens.length,
+			aave,
+			data.aTokens,
+			data.supplyAmts,
+			data._supplyTokens,
+			userAccount
+		);
+
+		// borrow assets after migrating position
+		if (data.convertStable) {
+			_BorrowVariable(
+				data._borrowTokens.length,
+				aave,
+				data._borrowTokens,
+				data.totalBorrowAmtsWithFee
+			);
+		} else {
+			_BorrowStable(
+				data._borrowTokens.length,
+				aave,
+				data._borrowTokens,
+				data.stableBorrowAmtsWithFee
+			);
+			_BorrowVariable(
+				data._borrowTokens.length,
+				aave,
+				data._borrowTokens,
+				data.variableBorrowAmtsWithFee
+			);
+		}
+
+		_eventName = "LogAaveV3Import(address,bool,address[],address[],uint256[],uint256[],uint256[],uint256[])";
+		_eventParam = abi.encode(
+			userAccount,
+			inputData.convertStable,
+			inputData.supplyTokens,
+			inputData.borrowTokens,
+			inputData.flashLoanFees,
+			data.supplyAmts,
+			data.stableBorrowAmts,
+			data.variableBorrowAmts
+		);
+	}
+
+	/**
+	 * @dev Import aave V3 position .
+	 * @notice Import EOA's aave V3 position to DSA's aave v3 position
+	 * @param userAccount The address of the EOA from which aave position will be imported
+	 * @param inputData The struct containing all the neccessary input data
+	 */
+	function importAave(address userAccount, ImportInputData memory inputData)
+		external
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		(_eventName, _eventParam) = _importAave(userAccount, inputData);
+	}
+}
+
+contract ConnectV2AaveV3ImportFantom is AaveV3ImportResolver {
+	string public constant name = "Aave-v3-import-v1";
+}

hardhat.config.ts

@@ -36,36 +36,31 @@ const PRIVATE_KEY = process.env.PRIVATE_KEY;
 const ETHERSCAN_API = process.env.ETHERSCAN_API_KEY;
 const POLYGONSCAN_API = process.env.POLYGON_API_KEY;
 const ARBISCAN_API = process.env.ARBISCAN_API_KEY;
-const OPTIMISM_API = process.env.OPTIMISM_API_KEY;
 const SNOWTRACE_API = process.env.SNOWTRACE_API_KEY;
-const mnemonic =
-  process.env.MNEMONIC ??
-  "test test test test test test test test test test test junk";
+const FANTOMSCAN_API = process.env.FANTOM_API_KEY;
+const mnemonic = process.env.MNEMONIC ?? "test test test test test test test test test test test junk";
 
 const networkGasPriceConfig: Record<string, string> = {
-  "mainnet": "160",
-  "polygon": "50",
-  "avalanche": "50",
-  "arbitrum": "2"
-}
+  mainnet: "160",
+  polygon: "50",
+  avalanche: "50",
+  arbitrum: "2"
+};
 
 function createConfig(network: string) {
   return {
     url: getNetworkUrl(network),
     accounts: !!PRIVATE_KEY ? [`0x${PRIVATE_KEY}`] : { mnemonic },
-    gasPrice: 1000000, // 0.0001 GWEI
+    gasPrice: 220000000000 // 0.0001 GWEI
   };
 }
 
 function getNetworkUrl(networkType: string) {
-  if (networkType === "avalanche")
-    return "https://api.avax.network/ext/bc/C/rpc";
-  else if (networkType === "polygon")
-    return `https://polygon-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
-  else if (networkType === "arbitrum")
-    return `https://arb-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
-  else if (networkType === "optimism")
-    return `https://opt-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
+  if (networkType === "avalanche") return "https://api.avax.network/ext/bc/C/rpc";
+  else if (networkType === "polygon") return `https://polygon-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
+  else if (networkType === "arbitrum") return `https://arb-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
+  else if (networkType === "optimism") return `https://opt-mainnet.g.alchemy.com/v2/${alchemyApiKey}`;
+  else if (networkType === "fantom") return `https://rpc.ftm.tools/`;
   else return `https://eth-mainnet.alchemyapi.io/v2/${alchemyApiKey}`;
 }
 
@@ -73,7 +68,7 @@ function getScanApiKey(networkType: string) {
   if (networkType === "avalanche") return SNOWTRACE_API;
   else if (networkType === "polygon") return POLYGONSCAN_API;
   else if (networkType === "arbitrum") return ARBISCAN_API;
-  else if (networkType === "optimism") return OPTIMISM_API;
+  else if (networkType === "fantom") return FANTOMSCAN_API;
   else return ETHERSCAN_API;
 }
 
@@ -88,53 +83,54 @@ const config: HardhatUserConfig = {
         settings: {
           optimizer: {
             enabled: true,
-            runs: 200,
-          },
-        },
+            runs: 200
+          }
+        }
       },
       {
-        version: "0.6.0",
+        version: "0.6.0"
       },
       {
-        version: "0.6.2",
+        version: "0.6.2"
       },
       {
-        version: "0.6.5",
-      },
-    ],
+        version: "0.6.5"
+      }
+    ]
   },
   networks: {
     hardhat: {
       accounts: {
-        mnemonic,
+        mnemonic
       },
       chainId: chainIds.hardhat,
       forking: {
-        url: String(getNetworkUrl(String(process.env.networkType))),
-      },
+        url: String(getNetworkUrl(String(process.env.networkType)))
+      }
     },
     mainnet: createConfig("mainnet"),
     polygon: createConfig("polygon"),
     avalanche: createConfig("avalanche"),
     arbitrum: createConfig("arbitrum"),
     optimism: createConfig("optimism"),
+    fantom: createConfig("optimism")
   },
   paths: {
     artifacts: "./artifacts",
     cache: "./cache",
     sources: "./contracts",
-    tests: "./test",
+    tests: "./test"
   },
   etherscan: {
-    apiKey: getScanApiKey(String(process.env.networkType)),
+    apiKey: getScanApiKey(String(process.env.networkType))
   },
   typechain: {
     outDir: "typechain",
-    target: "ethers-v5",
+    target: "ethers-v5"
   },
   mocha: {
-    timeout: 10000 * 1000, // 10,000 seconds
-  },
+    timeout: 10000 * 1000 // 10,000 seconds
+  }
   // tenderly: {
   //   project: process.env.TENDERLY_PROJECT,
   //   username: process.env.TENDERLY_USERNAME,