Add mainnet, arbitrum, polygon connectors

contracts/arbitrum/connectors/connext/events.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+contract Events {
+	event LogXCall(
+		uint32 destination,
+		address to,
+		address asset,
+		address delegate,
+		uint256 amount,
+		uint256 slippage,
+		uint256 getId,
+		uint256 setId
+	);
+}

contracts/arbitrum/connectors/connext/helpers.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+import { TokenInterface } from "../../common/interfaces.sol";
+import { DSMath } from "../../common/math.sol";
+import { Basic } from "../../common/basic.sol";
+import { IConnext } from "./interface.sol";
+
+contract Helpers is DSMath, Basic {
+	/**
+	 * @dev Connext Diamond Address
+	 */
+	address internal constant connextAddr =
+		0xEE9deC2712cCE65174B561151701Bf54b99C24C8;
+	IConnext internal constant connext = IConnext(connextAddr);
+
+	/**
+	 * @param destination The destination domain ID.
+	 * @param asset The address of token to be bridged.
+	 * @param delegate Address that can revert or forceLocal on destination.
+	 * @param amount The amount to transfer.
+	 * @param slippage Maximum amount of slippage the user will accept in BPS.
+	 * @param relayerFee Relayer fee paid in origin native asset.
+	 * @param callData Encoded calldata to send.
+	 */
+	struct XCallParams {
+		uint32 destination;
+		address to;
+		address asset;
+		address delegate;
+		uint256 amount;
+		uint256 slippage;
+		uint256 relayerFee;
+		bytes callData;
+	}
+
+	function _xcall(XCallParams memory params) internal {
+		connext.xcall{ value: params.relayerFee }(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			params.callData
+		);
+	}
+}

contracts/arbitrum/connectors/connext/interface.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+interface IConnext {
+	function xcall(
+		uint32 _destination,
+		address _to,
+		address _asset,
+		address _delegate,
+		uint256 _amount,
+		uint256 _slippage,
+		bytes calldata _callData
+	) external payable returns (bytes32);
+}

contracts/arbitrum/connectors/connext/main.sol

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+//SPDX-License-Identifier: MIT
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+/**
+ * @title Connext.
+ * @dev Cross chain bridge.
+ */
+
+import { TokenInterface, MemoryInterface } from "../../common/interfaces.sol";
+import { Stores } from "../../common/stores.sol";
+
+import "./interface.sol";
+import "./helpers.sol";
+import "./events.sol";
+
+abstract contract ConnextResolver is Helpers {
+	/**
+	 * @dev Call xcall on Connext.
+	 * @notice Call xcall on Connext.
+	 * @param params XCallParams struct.
+	 * @param getId ID to retrieve amount from last spell.
+	 * @param setId ID stores the amount of tokens deposited.
+	 */
+	function xcall(XCallParams memory params, uint256 getId, uint256 setId)
+		external
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		uint256 _amount = getUint(getId, params.amount);
+		TokenInterface tokenContract = TokenInterface(params.asset);
+		bool isNative = params.asset == ethAddr;
+
+		if (isNative) {
+			_amount = _amount == uint256(-1) ? address(this).balance : _amount;
+			params.asset = wethAddr;
+			tokenContract = TokenInterface(params.asset);
+			// xcall does not take native asset, must wrap 
+			convertEthToWeth(true, tokenContract, _amount);
+
+		} else {
+			_amount = _amount == uint256(-1) ? tokenContract.balanceOf(address(this)) : _amount;
+		}
+
+		params.amount = _amount;
+		approve(tokenContract, connextAddr, _amount);
+		_xcall(params);
+
+		setUint(setId, _amount);
+		_eventName = "LogXCall(uint32,address,address,address,uint256,uint256,uint256,uint256)";
+		_eventParam = abi.encode(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			getId,
+			setId
+		);
+	}
+}
+
+contract ConnectV2ConnextOptimism is ConnextResolver {
+	string public constant name = "Connext-v1.0";
+}

contracts/mainnet/connectors/connext/events.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+contract Events {
+	event LogXCall(
+		uint32 destination,
+		address to,
+		address asset,
+		address delegate,
+		uint256 amount,
+		uint256 slippage,
+		uint256 getId,
+		uint256 setId
+	);
+}

contracts/mainnet/connectors/connext/helpers.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+import { TokenInterface } from "../../common/interfaces.sol";
+import { DSMath } from "../../common/math.sol";
+import { Basic } from "../../common/basic.sol";
+import { IConnext } from "./interface.sol";
+
+contract Helpers is DSMath, Basic {
+	/**
+	 * @dev Connext Diamond Address
+	 */
+	address internal constant connextAddr =
+		0x8898B472C54c31894e3B9bb83cEA802a5d0e63C6;
+	IConnext internal constant connext = IConnext(connextAddr);
+
+	/**
+	 * @param destination The destination domain ID.
+	 * @param asset The address of token to be bridged.
+	 * @param delegate Address that can revert or forceLocal on destination.
+	 * @param amount The amount to transfer.
+	 * @param slippage Maximum amount of slippage the user will accept in BPS.
+	 * @param relayerFee Relayer fee paid in origin native asset.
+	 * @param callData Encoded calldata to send.
+	 */
+	struct XCallParams {
+		uint32 destination;
+		address to;
+		address asset;
+		address delegate;
+		uint256 amount;
+		uint256 slippage;
+		uint256 relayerFee;
+		bytes callData;
+	}
+
+	function _xcall(XCallParams memory params) internal {
+		connext.xcall{ value: params.relayerFee }(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			params.callData
+		);
+	}
+}

contracts/mainnet/connectors/connext/interface.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+interface IConnext {
+	function xcall(
+		uint32 _destination,
+		address _to,
+		address _asset,
+		address _delegate,
+		uint256 _amount,
+		uint256 _slippage,
+		bytes calldata _callData
+	) external payable returns (bytes32);
+}

contracts/mainnet/connectors/connext/main.sol

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+//SPDX-License-Identifier: MIT
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+/**
+ * @title Connext.
+ * @dev Cross chain bridge.
+ */
+
+import { TokenInterface, MemoryInterface } from "../../common/interfaces.sol";
+import { Stores } from "../../common/stores.sol";
+
+import "./interface.sol";
+import "./helpers.sol";
+import "./events.sol";
+
+abstract contract ConnextResolver is Helpers {
+	/**
+	 * @dev Call xcall on Connext.
+	 * @notice Call xcall on Connext.
+	 * @param params XCallParams struct.
+	 * @param getId ID to retrieve amount from last spell.
+	 * @param setId ID stores the amount of tokens deposited.
+	 */
+	function xcall(XCallParams memory params, uint256 getId, uint256 setId)
+		external
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		uint256 _amount = getUint(getId, params.amount);
+		TokenInterface tokenContract = TokenInterface(params.asset);
+		bool isNative = params.asset == ethAddr;
+
+		if (isNative) {
+			_amount = _amount == uint256(-1) ? address(this).balance : _amount;
+			params.asset = wethAddr;
+			tokenContract = TokenInterface(params.asset);
+			// xcall does not take native asset, must wrap 
+			convertEthToWeth(true, tokenContract, _amount);
+
+		} else {
+			_amount = _amount == uint256(-1) ? tokenContract.balanceOf(address(this)) : _amount;
+		}
+
+		params.amount = _amount;
+		approve(tokenContract, connextAddr, _amount);
+		_xcall(params);
+
+		setUint(setId, _amount);
+		_eventName = "LogXCall(uint32,address,address,address,uint256,uint256,uint256,uint256)";
+		_eventParam = abi.encode(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			getId,
+			setId
+		);
+	}
+}
+
+contract ConnectV2ConnextOptimism is ConnextResolver {
+	string public constant name = "Connext-v1.0";
+}

contracts/polygon/connectors/connext/events.sol

@@ -0,0 +1,15 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+contract Events {
+	event LogXCall(
+		uint32 destination,
+		address to,
+		address asset,
+		address delegate,
+		uint256 amount,
+		uint256 slippage,
+		uint256 getId,
+		uint256 setId
+	);
+}

contracts/polygon/connectors/connext/helpers.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+import { TokenInterface } from "../../common/interfaces.sol";
+import { DSMath } from "../../common/math.sol";
+import { Basic } from "../../common/basic.sol";
+import { IConnext } from "./interface.sol";
+
+contract Helpers is DSMath, Basic {
+	/**
+	 * @dev Connext Diamond Address
+	 */
+	address internal constant connextAddr =
+		0x11984dc4465481512eb5b777E44061C158CF2259;
+	IConnext internal constant connext = IConnext(connextAddr);
+
+	/**
+	 * @param destination The destination domain ID.
+	 * @param asset The address of token to be bridged.
+	 * @param delegate Address that can revert or forceLocal on destination.
+	 * @param amount The amount to transfer.
+	 * @param slippage Maximum amount of slippage the user will accept in BPS.
+	 * @param relayerFee Relayer fee paid in origin native asset.
+	 * @param callData Encoded calldata to send.
+	 */
+	struct XCallParams {
+		uint32 destination;
+		address to;
+		address asset;
+		address delegate;
+		uint256 amount;
+		uint256 slippage;
+		uint256 relayerFee;
+		bytes callData;
+	}
+
+	function _xcall(XCallParams memory params) internal {
+		connext.xcall{ value: params.relayerFee }(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			params.callData
+		);
+	}
+}

contracts/polygon/connectors/connext/interface.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.7.0;
+
+interface IConnext {
+	function xcall(
+		uint32 _destination,
+		address _to,
+		address _asset,
+		address _delegate,
+		uint256 _amount,
+		uint256 _slippage,
+		bytes calldata _callData
+	) external payable returns (bytes32);
+}

contracts/polygon/connectors/connext/main.sol

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+//SPDX-License-Identifier: MIT
+
+pragma solidity ^0.7.0;
+pragma experimental ABIEncoderV2;
+
+/**
+ * @title Connext.
+ * @dev Cross chain bridge.
+ */
+
+import { TokenInterface, MemoryInterface } from "../../common/interfaces.sol";
+import { Stores } from "../../common/stores.sol";
+
+import "./interface.sol";
+import "./helpers.sol";
+import "./events.sol";
+
+abstract contract ConnextResolver is Helpers {
+	/**
+	 * @dev Call xcall on Connext.
+	 * @notice Call xcall on Connext.
+	 * @param params XCallParams struct.
+	 * @param getId ID to retrieve amount from last spell.
+	 * @param setId ID stores the amount of tokens deposited.
+	 */
+	function xcall(XCallParams memory params, uint256 getId, uint256 setId)
+		external
+		payable
+		returns (string memory _eventName, bytes memory _eventParam)
+	{
+		uint256 _amount = getUint(getId, params.amount);
+		TokenInterface tokenContract = TokenInterface(params.asset);
+		bool isNative = params.asset == ethAddr;
+
+		if (isNative) {
+			_amount = _amount == uint256(-1) ? address(this).balance : _amount;
+			params.asset = wethAddr;
+			tokenContract = TokenInterface(params.asset);
+			// xcall does not take native asset, must wrap 
+			convertEthToWeth(true, tokenContract, _amount);
+
+		} else {
+			_amount = _amount == uint256(-1) ? tokenContract.balanceOf(address(this)) : _amount;
+		}
+
+		params.amount = _amount;
+		approve(tokenContract, connextAddr, _amount);
+		_xcall(params);
+
+		setUint(setId, _amount);
+		_eventName = "LogXCall(uint32,address,address,address,uint256,uint256,uint256,uint256)";
+		_eventParam = abi.encode(
+			params.destination,
+			params.to,
+			params.asset,
+			params.delegate,
+			params.amount,
+			params.slippage,
+			getId,
+			setId
+		);
+	}
+}
+
+contract ConnectV2ConnextOptimism is ConnextResolver {
+	string public constant name = "Connext-v1.0";
+}