feat(ethexe/contracts): add env to use existing WrappedVara address (#5245)

Author: StackOverflowExcept1on

ethexe/contracts/.env.example

@@ -14,6 +14,12 @@ ROUTER_VALIDATORS_LIST="0x0000000000000000000000000000000000000000,0x00000000000
 # address that receives half of WVARA token supply
 # SENDER_ADDRESS="0x0000000000000000000000000000000000000000" # optional, only for testing
 
+# https://wiki.vara.network/docs/vara-network/bridge/developer_hub#ethereum-mainnet
+# override WrappedVara to Ethereum Mainnet address (optional)
+# EXISTING_WRAPPED_VARA="0xB67010F2246814e5c39593ac23A925D9e9d7E5aD" # ethereum address
+# override WrappedVara to Ethereum Testnet address (optional)
+# EXISTING_WRAPPED_VARA="0xE1ab85A8B4d5d5B6af0bbD0203EB322DF33d0464" # ethereum address
+
 # In Proof of Authority (PoA) mode, Symbiotic contracts & Middleware will not be deployed
 # instead, POAMiddleware contract will be deployed
 IS_POA="true"

ethexe/contracts/script/Deployment.s.sol

@@ -32,9 +32,13 @@ contract DeploymentScript is Script {
 
         vm.startBroadcast(privateKey);
 
-        wrappedVara = WrappedVara(
-            Upgrades.deployUUPSProxy("WrappedVara.sol", abi.encodeCall(WrappedVara.initialize, (deployerAddress)))
-        );
+        if (vm.envExists("EXISTING_WRAPPED_VARA")) {
+            wrappedVara = WrappedVara(vm.envAddress("EXISTING_WRAPPED_VARA"));
+        } else {
+            wrappedVara = WrappedVara(
+                Upgrades.deployUUPSProxy("WrappedVara.sol", abi.encodeCall(WrappedVara.initialize, (deployerAddress)))
+            );
+        }
 
         bool isPoa = vm.envExists("IS_POA") && vm.envBool("IS_POA");