Feat: tx acceleration

contracts/SecretDelay.sol

@@ -18,11 +18,14 @@ contract SecretDelay is Modifier {
     bytes data,
     Enum.Operation operation
   );
+  event TransactionPromoted(uint256 indexed nonce);
 
   uint256 public txCooldown;
   uint256 public txExpiration;
   uint256 public txNonce;
   uint256 public queueNonce;
+  uint256 public approved;
+
   // Mapping of queue nonce to transaction hash.
   mapping(uint256 => bytes32) public txHash;
   // Mapping of queue nonce to creation timestamp.
@@ -106,9 +109,26 @@ contract SecretDelay is Modifier {
   function setTxNonce(uint256 _nonce) public onlyOwner {
     require(_nonce > txNonce, "New nonce must be higher than current txNonce");
     require(_nonce <= queueNonce, "Cannot be higher than queueNonce");
+
+    adjustApprovals(_nonce);
     txNonce = _nonce;
   }
 
+  function setTxNonceAndApprove(uint256 _nonce, uint256 _transactions)
+    public
+    onlyOwner
+  {
+    require(_nonce < queueNonce, "Cannot skip all transactions");
+    if (_nonce > txNonce) setTxNonce(_nonce);
+    approveNext(_transactions);
+  }
+
+  function approveNext(uint256 transactions) public onlyOwner {
+    require(transactions > 0, "Must approve at least one tx");
+    require(queueNonce - txNonce >= transactions, "Cannot approve unknown tx");
+    approved = transactions;
+  }
+
   /// @dev Adds a transaction to the queue (same as avatar interface so that this can be placed between other modules and the avatar).
   /// @param to Destination address of module transaction
   /// @param value Ether value of module transaction
@@ -149,7 +169,7 @@ contract SecretDelay is Modifier {
   ) public {
     require(txNonce < queueNonce, "Transaction queue is empty");
     require(
-      block.timestamp - txCreatedAt[txNonce] >= txCooldown,
+      (block.timestamp - txCreatedAt[txNonce] >= txCooldown) || approved > 0,
       "Transaction is still in cooldown"
     );
     if (txExpiration != 0) {
@@ -163,6 +183,7 @@ contract SecretDelay is Modifier {
       "Transaction hashes do not match"
     );
     txNonce++;
+    if (approved > 0) approved--;
     require(exec(to, value, data, operation), "Module transaction failed");
   }
 
@@ -192,4 +213,14 @@ contract SecretDelay is Modifier {
   function getTxCreatedAt(uint256 _nonce) public view returns (uint256) {
     return (txCreatedAt[_nonce]);
   }
+
+  function adjustApprovals(uint256 _nonce) internal {
+    uint256 delta = _nonce - txNonce;
+
+    if (delta > approved) {
+      if (approved != 0) approved = 0;
+    } else {
+      approved -= delta;
+    }
+  }
 }

contracts/test/TestContract.sol

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+pragma solidity >=0.8.0;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract TestContract is Ownable {
+  event ButtonPushed(address pusher);
+
+  function pushButton() public onlyOwner {
+    emit ButtonPushed(msg.sender);
+  }
+}