From 799d07739aee0fa55bd0bfd4f056091e176b6f83 Mon Sep 17 00:00:00 2001
From: ChefMist <133624774+ChefMist@users.noreply.github.com>
Date: Sat, 2 Nov 2024 15:25:50 +0800
Subject: [PATCH] feat: update universal router to use create3 deployment 
 (#24)

* forge install: pancake-create3-factory

* feat: deploy on eth sepolia and bsc testnet

* feat: updated remapping as auto_detect_remappings = false

* include acceptOwnership note
---
 .gitmodules                                   |  3 ++
 README.md                                     | 36 ++++++++++++++-----
 deploy-addresses/bsc-testnet.json             |  2 +-
 deploy-addresses/ethereum-sepolia.json        |  2 +-
 example_args.txt                              |  1 +
 foundry.toml                                  |  3 ++
 lib/pancake-create3-factory                   |  1 +
 remappings.txt                                |  3 ++
 script/DeployUniversalRouter.s.sol            | 32 ++++++++++++++---
 .../mainnet/DeployArbitrum.s.sol              | 12 +++++--
 .../deployParameters/mainnet/DeployBase.s.sol | 12 +++++--
 .../deployParameters/mainnet/DeployBsc.s.sol  | 12 +++++--
 .../deployParameters/mainnet/DeployEth.s.sol  | 12 +++++--
 .../mainnet/DeployLinea.s.sol                 | 12 +++++--
 .../mainnet/DeployOpBnb.s.sol                 |  9 ++++-
 .../mainnet/DeployzkEvm.s.sol                 | 12 +++++--
 .../testnet/DeployBscTestnet.s.sol            | 12 +++++--
 .../testnet/DeployEthSepolia.s.sol            | 12 +++++--
 .../testnet/args/bsc_testnet.txt              |  1 +
 .../testnet/args/eth_sepolia.txt              |  1 +
 20 files changed, 158 insertions(+), 32 deletions(-)
 create mode 100644 example_args.txt
 create mode 160000 lib/pancake-create3-factory
 create mode 100644 script/deployParameters/testnet/args/bsc_testnet.txt
 create mode 100644 script/deployParameters/testnet/args/eth_sepolia.txt

diff --git a/.gitmodules b/.gitmodules
index 527d22a..cb1a50f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "lib/pancake-v4-periphery"]
 	path = lib/pancake-v4-periphery
 	url = https://github.com/pancakeswap/pancake-v4-periphery
+[submodule "lib/pancake-create3-factory"]
+	path = lib/pancake-create3-factory
+	url = https://github.com/pancakeswap/pancake-create3-factory
diff --git a/README.md b/README.md
index 4a88de6..d302964 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 1. Install dependencies with `forge install`
 
 2. Grab a RPC (eg. from nodereal) with history 
-```
+```bash
 // testnet fork test for v4, mainnet fork test for v2/v3 
 export FORK_URL=https://bsc-mainnet.nodereal.io/v1/xxx
 export TESTNET_FORK_URL=https://bsc-testnet.nodereal.io/v1/xxx
@@ -21,21 +21,41 @@ export TESTNET_FORK_URL=https://bsc-testnet.nodereal.io/v1/xxx
 
 Ensure `script/deployParameters/Deploy{chain}.s.sol` is updated 
 
-```
+```bash
 // set rpc url
 export RPC_URL=https://
 
 // private key need to be prefixed with 0x
 export PRIVATE_KEY=0x
 
-// optional. Only set if you want to verify contract on explorer
-export ETHERSCAN_API_KEY=xx
-
-// remove --verify flag if etherscan_api_key is not set
 // replace with the respective chain eg. DeployArbitrum.s.sol:DeployArbitrum
 forge script script/deployParameters/DeployArbitrum.s.sol:DeployArbitrum -vvv \
     --rpc-url $RPC_URL \
     --broadcast \
-    --slow \
-    --verify
+    --slow 
 ``` 
+
+Remember to call `.acceptOwnership()` to be the owner of universal router
+
+## Verifying
+
+Each script includes a verification command. Verification needs to be performed separately since the contract is deployed using the create3 method.
+
+```bash
+export ETHERSCAN_API_KEY=xx
+
+forge verify-contract <address> UniversalRouter --watch --chain 97 --constructor-args-path example_args.txt
+```
+
+The file `example_args.txt` contains all the parameters specified in RouterParams.
+
+Example
+```solidity
+params = RouterParameters({
+    permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
+    weth9: 0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd,
+    ...
+})
+```
+
+then `example_args.txt` would be (0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768, 0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd,...)
diff --git a/deploy-addresses/bsc-testnet.json b/deploy-addresses/bsc-testnet.json
index 743db41..60e361e 100644
--- a/deploy-addresses/bsc-testnet.json
+++ b/deploy-addresses/bsc-testnet.json
@@ -1,4 +1,4 @@
 {
-  "UniversalRouter": "0x7a7F562aCEb6e6352ee2FF93aeFb1051d4A1511A",
+  "UniversalRouter": "0x19Dbcfc815166633A393953B91115BF6D20E5c5a",
   "UnsupportedProtocol": "0xe4da88F38C11C1450c720b8aDeDd94956610a4e5"
 }
diff --git a/deploy-addresses/ethereum-sepolia.json b/deploy-addresses/ethereum-sepolia.json
index 1d346ea..3cf6355 100644
--- a/deploy-addresses/ethereum-sepolia.json
+++ b/deploy-addresses/ethereum-sepolia.json
@@ -1,4 +1,4 @@
 {
-  "UniversalRouter": "0x6A3d58cc25a92d90Fa3a8f0f5d5e75AD01ccd7a6",
+  "UniversalRouter": "0x19Dbcfc815166633A393953B91115BF6D20E5c5a",
   "UnsupportedProtocol": "0x6879F5C1AdaDDF29892bf650F9C48350C12795D9"
 }
diff --git a/example_args.txt b/example_args.txt
new file mode 100644
index 0000000..3aa8a89
--- /dev/null
+++ b/example_args.txt
@@ -0,0 +1 @@
+(0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd,0x6725F303b657a9451d8BA641348b6761A6CC7a17,0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865,0x41ff9AA7e16B8B1a8a8dc4f0eFacd93D02d071c9,0xd0d4c4cd0848c93cb4fd1f498d7013ee6bfb25783ea21593d5834f5d250ece66,0x6ce8eb472fa82df5469c6ab6d485f17c3ad13c8cd7af59b3d4a8026c5ce0f7e2,0xe6A00f8b819244e8Ab9Ea930e46449C2F20B6609,0x0A548d59D04096Bc01206D58C3D63c478e1e06dB,0x0a125Bb36e409957Ed951eF1FBe20e81D682EAb6,0x26Ca53c8C5CE90E22aA1FadDA68AB9a08f7BA06f,0x1DF0be383e9d17DA4448E57712849aBE5b3Fa33b,0x427bF5b37357632377eCbEC9de3626C71A5396c1,0x095bd2cf90ef113aa8c53904cE54C17f4583046d,0x26008c91a2D47147d6739db3fFd3598A27da859d)
\ No newline at end of file
diff --git a/foundry.toml b/foundry.toml
index 7ce5dc2..1d2dc5c 100644
--- a/foundry.toml
+++ b/foundry.toml
@@ -12,4 +12,7 @@ fs_permissions = [
 solc_version = '0.8.26'
 evm_version = "cancun"
 
+# ref: https://github.com/foundry-rs/foundry/issues/4060 otherwise verification will have an issue
+auto_detect_remappings = false
+
 # See more config options https://github.com/foundry-rs/foundry/tree/master/config
diff --git a/lib/pancake-create3-factory b/lib/pancake-create3-factory
new file mode 160000
index 0000000..959233c
--- /dev/null
+++ b/lib/pancake-create3-factory
@@ -0,0 +1 @@
+Subproject commit 959233c3742131de85443e7272999e2ab288852d
diff --git a/remappings.txt b/remappings.txt
index 09898d5..1f472a1 100644
--- a/remappings.txt
+++ b/remappings.txt
@@ -1,7 +1,10 @@
 forge-std/=lib/forge-std/src/
 ds-test/=lib/forge-std/lib/ds-test/src/
 @openzeppelin/=lib/pancake-v4-periphery/lib/pancake-v4-core/lib/openzeppelin-contracts/
+openzeppelin-contracts/=lib/pancake-v4-periphery/lib/pancake-v4-core/lib/openzeppelin-contracts/
 solmate/=lib/pancake-v4-periphery/lib/pancake-v4-core/lib/solmate/
 pancake-v4-periphery/=lib/pancake-v4-periphery/
 pancake-v4-core/=lib/pancake-v4-periphery/lib/pancake-v4-core
 permit2/=lib/pancake-v4-periphery/lib/permit2/
+pancake-create3-factory/=lib/pancake-create3-factory/
+forge-gas-snapshot/=lib/forge-gas-snapshot/src/
diff --git a/script/DeployUniversalRouter.s.sol b/script/DeployUniversalRouter.s.sol
index d7b9b97..8ff738f 100644
--- a/script/DeployUniversalRouter.s.sol
+++ b/script/DeployUniversalRouter.s.sol
@@ -6,12 +6,13 @@ import "forge-std/Script.sol";
 import {RouterParameters} from "../src/base/RouterImmutables.sol";
 import {UnsupportedProtocol} from "../src/deploy/UnsupportedProtocol.sol";
 import {UniversalRouter} from "../src/UniversalRouter.sol";
-
-bytes32 constant SALT = bytes32(uint256(0x00000000000000000000000000000000000000005eb67581652632000a6cbedf));
+import {Create3Factory} from "pancake-create3-factory/src/Create3Factory.sol";
+import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
 
 abstract contract DeployUniversalRouter is Script {
     RouterParameters internal params;
     address internal unsupported;
+    address internal create3Factory; // from https://github.com/pancakeswap/pancake-create3-factory
 
     address constant UNSUPPORTED_PROTOCOL = address(0);
     bytes32 constant BYTES32_ZERO = bytes32(0);
@@ -21,7 +22,15 @@ abstract contract DeployUniversalRouter is Script {
     // set values for params and unsupported
     function setUp() public virtual;
 
-    function run() external returns (UniversalRouter router) {
+    /// @notice must be implemented by the inheriting contract to make sure eth deployment salt is unique
+    /// since the deployment salt will be the only factor to decide the address of the newly deployed contract
+    function getDeploymentSalt() public view virtual returns (bytes32);
+
+    function run() external returns (address router) {
+        /// @dev address from https://github.com/pancakeswap/pancake-create3-factory
+        Create3Factory factory = Create3Factory(0x38Ab3f2CE00973A51d3A2A04d634C9bcbf20e4e1);
+
+        // deployer will the the initial owner of universal router
         uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY");
         vm.startBroadcast(deployerPrivateKey);
 
@@ -53,8 +62,21 @@ abstract contract DeployUniversalRouter is Script {
 
         logParams();
 
-        router = new UniversalRouter(params);
-        console2.log("Universal Router Deployed:", address(router));
+        /// Prepare the payload to transfer ownership to deployer.
+        /// @dev deployer must call acceptOwnership after to be the owner
+        address owner = vm.addr(deployerPrivateKey);
+        console.log("universal router owner:", owner);
+
+        bytes memory afterDeploymentExecutionPayload = abi.encodeWithSelector(Ownable.transferOwnership.selector, owner);
+
+        bytes memory creationCode = abi.encodePacked(type(UniversalRouter).creationCode, abi.encode(params));
+
+        router = factory.deploy(
+            getDeploymentSalt(), creationCode, keccak256(creationCode), 0, afterDeploymentExecutionPayload, 0
+        );
+
+        console.log("UniversalRouter contract deployed at ", router);
+
         vm.stopBroadcast();
     }
 
diff --git a/script/deployParameters/mainnet/DeployArbitrum.s.sol b/script/deployParameters/mainnet/DeployArbitrum.s.sol
index c57d0f5..4d61df2 100644
--- a/script/deployParameters/mainnet/DeployArbitrum.s.sol
+++ b/script/deployParameters/mainnet/DeployArbitrum.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployArbitrum.s.sol:DeployArbitrum -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 42161 --constructor-args-path example_args.txt
  */
 contract DeployArbitrum is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployBase.s.sol b/script/deployParameters/mainnet/DeployBase.s.sol
index b0692d9..e799a92 100644
--- a/script/deployParameters/mainnet/DeployBase.s.sol
+++ b/script/deployParameters/mainnet/DeployBase.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployBase.s.sol:DeployBase -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 8453 --constructor-args-path example_args.txt
  */
 contract DeployBase is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployBsc.s.sol b/script/deployParameters/mainnet/DeployBsc.s.sol
index 3f31ea4..7689198 100644
--- a/script/deployParameters/mainnet/DeployBsc.s.sol
+++ b/script/deployParameters/mainnet/DeployBsc.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployBsc.s.sol:DeployBsc -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 56 --constructor-args-path example_args.txt
  */
 contract DeployBsc is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployEth.s.sol b/script/deployParameters/mainnet/DeployEth.s.sol
index 08b1a60..4e49911 100644
--- a/script/deployParameters/mainnet/DeployEth.s.sol
+++ b/script/deployParameters/mainnet/DeployEth.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployEth.s.sol:DeployEth -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 1 --constructor-args-path example_args.txt
  */
 contract DeployEth is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployLinea.s.sol b/script/deployParameters/mainnet/DeployLinea.s.sol
index 333edd0..b2cd67b 100644
--- a/script/deployParameters/mainnet/DeployLinea.s.sol
+++ b/script/deployParameters/mainnet/DeployLinea.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployLinea.s.sol:DeployLinea -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 59144 --constructor-args-path example_args.txt
  */
 contract DeployLinea is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployOpBnb.s.sol b/script/deployParameters/mainnet/DeployOpBnb.s.sol
index 3a68e32..f2c0e37 100644
--- a/script/deployParameters/mainnet/DeployOpBnb.s.sol
+++ b/script/deployParameters/mainnet/DeployOpBnb.s.sol
@@ -5,13 +5,20 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
- * Note: As of now, opbnb does not support verify via foundry, so skipping --verify flag
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployOpBnb.s.sol:DeployOpbnb -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
  *     --slow
+ *
+ * Step 2: Verify. As of now, opbnb does not support verify via foundry, so skipping verify
  */
 contract DeployOpbnb is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/mainnet/DeployzkEvm.s.sol b/script/deployParameters/mainnet/DeployzkEvm.s.sol
index 82a86d8..cddae16 100644
--- a/script/deployParameters/mainnet/DeployzkEvm.s.sol
+++ b/script/deployParameters/mainnet/DeployzkEvm.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/mainnet/DeployzkEvm.s.sol:DeployZkEvm -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 1101 --constructor-args-path example_args.txt
  */
 contract DeployZkEvm is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     function setUp() public override {
         params = RouterParameters({
             permit2: 0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,
diff --git a/script/deployParameters/testnet/DeployBscTestnet.s.sol b/script/deployParameters/testnet/DeployBscTestnet.s.sol
index 55d76ee..bc90615 100644
--- a/script/deployParameters/testnet/DeployBscTestnet.s.sol
+++ b/script/deployParameters/testnet/DeployBscTestnet.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/testnet/DeployBscTestnet.s.sol:DeployBscTestnet -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 97 --constructor-args-path ./script/deployParameters/testnet/args/bsc_testnet.txt
  */
 contract DeployBscTestnet is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     // ref from v3 universal router: https://testnet.bscscan.com/tx/0xdfab014e4f5df56d5a8b16375028ad0340f80070bd848eb57c4e0baf41210487
     function setUp() public override {
         params = RouterParameters({
diff --git a/script/deployParameters/testnet/DeployEthSepolia.s.sol b/script/deployParameters/testnet/DeployEthSepolia.s.sol
index 36b8a6f..c3f7e28 100644
--- a/script/deployParameters/testnet/DeployEthSepolia.s.sol
+++ b/script/deployParameters/testnet/DeployEthSepolia.s.sol
@@ -5,13 +5,21 @@ import {DeployUniversalRouter} from "../../DeployUniversalRouter.s.sol";
 import {RouterParameters} from "../../../src/base/RouterImmutables.sol";
 
 /**
+ * Step 1: Deploy
  * forge script script/deployParameters/testnet/DeployEthSepolia.s.sol:DeployEthSepolia -vvv \
  *     --rpc-url $RPC_URL \
  *     --broadcast \
- *     --slow \
- *     --verify
+ *     --slow
+ *
+ * Step 2: Verify - example_args.txt is the constructor arguments in the form of (args1, args2, args)
+ * forge verify-contract <address> UniversalRouter --watch --chain 11155111 --constructor-args-path ./script/deployParameters/testnet/args/eth_sepolia.txt
  */
 contract DeployEthSepolia is DeployUniversalRouter {
+    /// @notice contract address will be based on deployment salt
+    function getDeploymentSalt() public pure override returns (bytes32) {
+        return keccak256("PANCAKE-V4-UNIVERSAL-ROUTER/UniversalRouter/0.0001");
+    }
+
     // ref from v3 universal router: https://sepolia.etherscan.io/tx/0xb4610521d3fc61f4837edbd899acb6c33a5fe0f3bb32ab84745ac0a8b1859906
     // and from pancake-frontend config
     function setUp() public override {
diff --git a/script/deployParameters/testnet/args/bsc_testnet.txt b/script/deployParameters/testnet/args/bsc_testnet.txt
new file mode 100644
index 0000000..3aa8a89
--- /dev/null
+++ b/script/deployParameters/testnet/args/bsc_testnet.txt
@@ -0,0 +1 @@
+(0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,0xae13d989daC2f0dEbFf460aC112a837C89BAa7cd,0x6725F303b657a9451d8BA641348b6761A6CC7a17,0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865,0x41ff9AA7e16B8B1a8a8dc4f0eFacd93D02d071c9,0xd0d4c4cd0848c93cb4fd1f498d7013ee6bfb25783ea21593d5834f5d250ece66,0x6ce8eb472fa82df5469c6ab6d485f17c3ad13c8cd7af59b3d4a8026c5ce0f7e2,0xe6A00f8b819244e8Ab9Ea930e46449C2F20B6609,0x0A548d59D04096Bc01206D58C3D63c478e1e06dB,0x0a125Bb36e409957Ed951eF1FBe20e81D682EAb6,0x26Ca53c8C5CE90E22aA1FadDA68AB9a08f7BA06f,0x1DF0be383e9d17DA4448E57712849aBE5b3Fa33b,0x427bF5b37357632377eCbEC9de3626C71A5396c1,0x095bd2cf90ef113aa8c53904cE54C17f4583046d,0x26008c91a2D47147d6739db3fFd3598A27da859d)
\ No newline at end of file
diff --git a/script/deployParameters/testnet/args/eth_sepolia.txt b/script/deployParameters/testnet/args/eth_sepolia.txt
new file mode 100644
index 0000000..fb4d060
--- /dev/null
+++ b/script/deployParameters/testnet/args/eth_sepolia.txt
@@ -0,0 +1 @@
+(0x31c2F6fcFf4F8759b3Bd5Bf0e1084A055615c768,0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14,0x1bdc540dEB9Ed1fA29964DeEcCc524A8f5e2198e,0x0BFbCF9fa4f9C56B0F40a671Ad40E0805A091865,0x41ff9AA7e16B8B1a8a8dc4f0eFacd93D02d071c9,0xd0d4c4cd0848c93cb4fd1f498d7013ee6bfb25783ea21593d5834f5d250ece66,0x6ce8eb472fa82df5469c6ab6d485f17c3ad13c8cd7af59b3d4a8026c5ce0f7e2,0x6879F5C1AdaDDF29892bf650F9C48350C12795D9,0x6879F5C1AdaDDF29892bf650F9C48350C12795D9,0x4670F769Daa625FF5F89719AE5295E9824f5805f,0xD4EAc75ee0E76EAD6AC6995DF30CA14b38549682,0x0Ca8430E263A098B998E47e0544C2C82B30CbDB1,0x46A15B0b27311cedF172AB29E4f4766fbE7F4364,0x53C9802F47295979c0E154779eD10fa6af27D7cA,0x21015eF9927e06b7Fc19D986A214e449Aa22FF7d)
\ No newline at end of file