Update SecureSpeed

SecureSpeed

@@ -98,3 +98,93 @@ contract SecureSpeed {
  maxFee = newMaxFee;
  }
 }
+pragma solidity ^0.11.0;
+
+contract SecureSpeed {
+ // Payment channel data structure
+ struct Channel {
+ address user1;
+ address user2;
+ uint deposit;
+ bool closed;
+ }
+ mapping (address => mapping (address => Channel)) public channels;
+
+ // External Oracle
+ address externalOracle;
+
+ //Transaction fee
+ uint fee = 0.01;
+ uint maxFee = 5 ether;
+
+ // Token standard
+ ERC20 public token;
+
+ constructor(address _externalOracle, address _token) public {
+ externalOracle = _externalOracle;
+ token = ERC20(_token);
+ }
+ // Deposit function
+ function deposit(address user, uint value) public {
+ require(value > 0, "Deposit must be greater than 0");
+ require(token.transferFrom(msg.sender, address(this), value), "Transfer failed");
+ openChannel(msg.sender, user, value, block.timestamp + 1 days);
+ }
+
+ // Withdraw function
+ function withdraw(address user, uint value) public {
+ require(value > 0, "Withdrawal must be greater than 0");
+ require(!channels[msg.sender][user].closed, "Payment channel is closed");
+ require(channels[msg.sender][user].deposit >= value, "Insufficient funds in the channel");
+ channels[msg.sender][user].deposit -= value;
+ token.transfer(msg.sender, value);
+ if(channels[msg.sender][user].deposit == 0)
+ closeChannel(msg.sender, user);
+ }
+
+ // Update deposit function
+ function updateDeposit(address user, uint value) public {
+ require(value > 0, "Deposit must be greater than 0");
+ require(!channels[msg.sender][user].closed, "Payment channel is closed");
+ require(token.transferFrom(msg.sender, address(this), value), "Transfer failed");
+ updateChannel(msg.sender, user, value);
+ }
+
+ // Initiate transaction function
+ function initiateTransaction(address user1, address user2, address recipient, uint value, bytes memory signature1, bytes memory signature2) public {
+ require(!channels[user1][user2].closed, "Payment channel is closed");
+ executeTransaction(user1, user2, recipient, value, signature1, signature2);
+ }
+
+ // Resolve dispute function
+ function resolveDispute(address user1, address user2) public {
+ require(!channels[user1][user2].closed, "Payment channel is already closed");
+ require(msg.sender == user1 || msg.sender == user2, "Only parties involved in the channel can resolve a dispute");
+ // Check dispute resolution with external Oracle
+ (bool resolved, uint finalBalance) = externalOracle.call(abi.encodePacked("resolveDispute(address,address)", user1, user2));
+ require(resolved, "Dispute could not be resolved by the external Oracle");
+ // Transfer remaining funds to user1
+ token.transfer(user1, finalBalance);
+ closeChannel(user1, user2);
+ }
+
+ // Close channel function
+ function closeChannel(address user1, address user2) private {
+ channels[user1][user2].closed = true;
+ }
+ // Update channel function
+ function updateChannel(address user1, address user2, uint newDeposit) private {
+ require(channels[user1][user2].deposit + newDeposit >= channels[user1][user2].deposit, "New deposit must be greater than the existing deposit");
+ channels[user1][user2].deposit += newDeposit;
+ }
+ // Execute transaction function
+ function executeTransaction(address user1, address user2, address recipient, uint value, bytes memory signature1, bytes memory signature2) private {
+ require(channels[user1][user2].deposit >= value, "Insufficient funds in the channel");
+ require(value >= fee, "Transaction value is too low");
+ require(value <= channels[user1][user2].deposit, "Transaction value exceeds the deposit in the channel");
+ require(ecrecover(keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(abi.encodePacked(user1, user2, recipient, value)))), signature1) == user1, "Invalid signature from user1");
+ require(ecrecover(keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", keccak256(abi.encodePacked(user1, user2, recipient, value)))), signature2) == user2, "Invalid signature from user2");
+ channels[user1][user2].deposit -= value;
+ token.transfer(recipient, value);
+}
+