chore: add deploy script for LmsrFeeCollector

script/DeployLmsrFeeCollector.s.sol

@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import "forge-std/Script.sol";
+import "../contracts/v2/VaultV2.sol";
+import "../contracts/v2/LmsrFeeCollector.sol";
+
+/**
+ * @title DeployLmsrFeeCollector
+ * @notice Deploys LmsrFeeCollector and whitelists it on existing VaultV2
+ *
+ * Does NOT redeploy VaultV2. Only:
+ *   1. Deploys LmsrFeeCollector(vault, admin)
+ *   2. Calls vault.addWhitelistedMarket(feeCollector) — gives it withdrawFeePool access
+ *
+ * After deployment, add the address to flipcoin-app deployments.local.ts:
+ *   deploymentsBaseMainnetV2.feeCollector = "0x...";
+ *
+ * Usage (testnet):
+ *   source .env
+ *   forge script script/DeployLmsrFeeCollector.s.sol:DeployLmsrFeeCollectorScript \
+ *     --rpc-url $BASE_SEPOLIA_RPC_URL \
+ *     --broadcast -vvvv
+ *
+ * Usage (mainnet — multisig):
+ *   forge script script/DeployLmsrFeeCollector.s.sol:DeployLmsrFeeCollectorScript \
+ *     --rpc-url $BASE_RPC_URL \
+ *     --broadcast -vvvv
+ *
+ * For multisig deployment: use the generated tx data from --broadcast output
+ * and submit through Safe (gnosis-safe.io).
+ */
+contract DeployLmsrFeeCollectorScript is Script {
+    function run() external {
+        // ── Config: update these for your target network ──
+
+        // Base mainnet VaultV2
+        address VAULT = 0xACBf5A2f23d2b959D0623fe4345D3F9369dEA15a;
+        // Multisig admin
+        address ADMIN = 0x2196031BeA489f695a653396680B6A3916d9a208;
+
+        uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY");
+        address deployer = vm.addr(deployerPrivateKey);
+
+        console.log("=== LmsrFeeCollector Deployment ===");
+        console.log("Deployer:", deployer);
+        console.log("VaultV2: ", VAULT);
+        console.log("Admin:   ", ADMIN);
+        console.log("");
+
+        vm.startBroadcast(deployerPrivateKey);
+
+        // 1. Deploy LmsrFeeCollector
+        LmsrFeeCollector collector = new LmsrFeeCollector(VAULT, ADMIN);
+        console.log("[1/2] LmsrFeeCollector:", address(collector));
+
+        // 2. Whitelist on VaultV2
+        //    NOTE: This call must come from VaultV2.admin (the multisig).
+        //    If deployer != admin, this will revert — use Safe to queue this tx.
+        if (deployer == ADMIN) {
+            VaultV2(VAULT).addWhitelistedMarket(address(collector));
+            console.log("[2/2] Whitelisted on VaultV2");
+        } else {
+            console.log("[2/2] SKIP: deployer != admin. Queue this tx via Safe:");
+            console.log("       vault.addWhitelistedMarket(%s)", address(collector));
+        }
+
+        vm.stopBroadcast();
+
+        console.log("");
+        console.log("=== Deployment Complete ===");
+        console.log("LmsrFeeCollector:", address(collector));
+        console.log("");
+        console.log("Next steps:");
+        console.log("  1. If not done above: vault.addWhitelistedMarket(<address>) via Safe");
+        console.log("  2. Add to flipcoin-app: deploymentsBaseMainnetV2.feeCollector = '0x...'");
+        console.log("  3. Verify on Basescan: verify contract source");
+    }
+}