From 6f8757155a3aba39668ac2c5d9821b7962bca0f5 Mon Sep 17 00:00:00 2001
From: Thrilok Kumar <thrilok2000@gmail.com>
Date: Fri, 1 May 2020 21:31:59 +0530
Subject: [PATCH] Added basic connector

---
 contracts/basic.sol | 151 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 contracts/basic.sol

diff --git a/contracts/basic.sol b/contracts/basic.sol
new file mode 100644
index 0000000..3de6c35
--- /dev/null
+++ b/contracts/basic.sol
@@ -0,0 +1,151 @@
+pragma solidity ^0.6.0;
+
+/**
+ * @title ConnectBasic.
+ * @dev Connector to deposit/withdraw assets.
+ */
+
+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);
+}
+
+interface AccountInterface {
+    function isAuth(address _user) external view returns (bool);
+}
+
+interface MemoryInterface {
+    function getUint(uint _id) external returns (uint _num);
+    function setUint(uint _id, uint _val) external;
+}
+
+interface EventInterface {
+    function emitEvent(uint _connectorType, uint _connectorID, bytes32 _eventCode, bytes calldata _eventData) external;
+}
+
+contract Memory {
+
+    /**
+     * @dev Return InstaMemory Address.
+     */
+    function getMemoryAddr() public pure returns (address) {
+        return 0x8a5419CfC711B2343c17a6ABf4B2bAFaBb06957F; // InstaMemory Address
+    }
+
+    /**
+     * @dev Return InstaEvent Address.
+     */
+    function getEventAddr() public pure returns (address) {
+        return 0x2af7ea6Cb911035f3eb1ED895Cb6692C39ecbA97; // InstaEvent Address
+    }
+
+    /**
+     * @dev Get Stored Uint Value From InstaMemory.
+     * @param getId Storage ID.
+     * @param val if any value.
+     */
+    function getUint(uint getId, uint val) internal returns (uint returnVal) {
+        returnVal = getId == 0 ? val : MemoryInterface(getMemoryAddr()).getUint(getId);
+    }
+
+    /**
+     * @dev Store Uint Value In InstaMemory.
+     * @param setId Storage ID.
+     * @param val Value To store.
+     */
+    function setUint(uint setId, uint val) internal {
+        if (setId != 0) MemoryInterface(getMemoryAddr()).setUint(setId, val);
+    }
+
+    /**
+     * @dev Connector ID and Type.
+     */
+    function connectorID() public pure returns(uint _type, uint _id) {
+        (_type, _id) = (1, 2);
+    }
+
+}
+
+contract BasicResolver is Memory {
+
+    event LogDeposit(address indexed erc20, uint256 tokenAmt, uint256 getId, uint256 setId);
+    event LogWithdraw(address indexed erc20, uint256 tokenAmt, address indexed to, uint256 getId, uint256 setId);
+
+    /**
+     * @dev ETH Address.
+     */
+    function getEthAddr() public pure returns (address) {
+        return 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
+    }
+
+    /**
+     * @dev Deposit Assets To Smart Account.
+     * @param erc20 Token Address.
+     * @param tokenAmt Token Amount.
+     * @param getId Get Storage ID.
+     * @param setId Set Storage ID.
+     */
+    function deposit(address erc20, uint tokenAmt, uint getId, uint setId) public payable {
+        uint amt = getUint(getId, tokenAmt);
+        if (erc20 != getEthAddr()) {
+            ERC20Interface token = ERC20Interface(erc20);
+            amt = amt == uint(-1) ? token.balanceOf(msg.sender) : amt;
+            token.transferFrom(msg.sender, address(this), amt);
+        } else {
+            require(msg.value == amt || amt == uint(-1), "invalid-ether-amount");
+            amt = msg.value;
+        }
+        setUint(setId, amt);
+
+        emit LogDeposit(erc20, amt, getId, setId);
+
+        bytes32 _eventCode = keccak256("LogDeposit(address,uint256,uint256,uint256)");
+        bytes memory _eventParam = abi.encode(erc20, amt, getId, setId);
+        (uint _type, uint _id) = connectorID();
+        EventInterface(getEventAddr()).emitEvent(_type, _id, _eventCode, _eventParam);
+    }
+
+   /**
+     * @dev Withdraw Assets To Smart Account.
+     * @param erc20 Token Address.
+     * @param tokenAmt Token Amount.
+     * @param to Withdraw token address.
+     * @param getId Get Storage ID.
+     * @param setId Set Storage ID.
+     */
+    function withdraw(
+        address erc20,
+        uint tokenAmt,
+        address payable to,
+        uint getId,
+        uint setId
+    ) public payable {
+        require(AccountInterface(address(this)).isAuth(to), "invalid-to-address");
+        uint amt = getUint(getId, tokenAmt);
+        if (erc20 == getEthAddr()) {
+            amt = amt == uint(-1) ? address(this).balance : amt;
+            to.transfer(amt);
+        } else {
+            ERC20Interface token = ERC20Interface(erc20);
+            amt = amt == uint(-1) ? token.balanceOf(address(this)) : amt;
+            token.transfer(to, amt);
+        }
+        setUint(setId, amt);
+
+        emit LogWithdraw(erc20, amt, to, getId, setId);
+
+        bytes32 _eventCode = keccak256("LogWithdraw(address,uint256,address,uint256,uint256)");
+        bytes memory _eventParam = abi.encode(erc20, amt, to, getId, setId);
+        (uint _type, uint _id) = connectorID();
+        EventInterface(getEventAddr()).emitEvent(_type, _id, _eventCode, _eventParam);
+    }
+
+}
+
+
+contract ConnectBasic is BasicResolver {
+    string public constant name = "Basic-v1";
+}
\ No newline at end of file