Create Bridge.js

blockchain_integration/pi_network/pi-network-interoperability/bridge-contracts/binance-smart-chain/Bridge.js

@@ -0,0 +1,38 @@
+pragma solidity ^0.8.0;
+
+import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol";
+import "https://github.com/binance-chain/bsc-bridge/blob/master/contracts/BEP20.sol";
+
+contract Bridge {
+    address public owner;
+    mapping(address => uint256) public balances;
+    mapping(address => mapping(address => uint256)) public allowances;
+
+    event Transfer(address indexed from, address indexed to, uint256 value);
+    event Approval(address indexed owner, address indexed spender, uint256 value);
+
+    constructor() public {
+        owner = msg.sender;
+    }
+
+    function bridgeToken(address tokenAddress, address recipientAddress, uint256 amount) public {
+        require(msg.sender == owner, "Only the owner can bridge tokens");
+        SafeERC20.safeTransfer(tokenAddress, recipientAddress, amount);
+        balances[tokenAddress] -= amount;
+    }
+
+    function getBalance(address tokenAddress) public view returns (uint256) {
+        return balances[tokenAddress];
+    }
+
+    function approve(address spender, uint256 amount) public {
+        allowances[msg.sender][spender] = amount;
+        emit Approval(msg.sender, spender, amount);
+    }
+
+    function transferFrom(address sender, address recipient, uint256 amount) public {
+        require(allowances[sender][msg.sender] >= amount, "Insufficient allowance");
+        SafeERC20.safeTransfer(sender, recipient, amount);
+        allowances[sender][msg.sender] -= amount;
+    }
+}