Create and initialize SystemSignerRegistry keeping track of signers

Author: ranchalp

scripts/foundry/InitializeL1ScrollOwner.s.sol

@@ -21,6 +21,9 @@ import {ScrollChain} from "../../src/L1/rollup/ScrollChain.sol";
 import {ScrollOwner} from "../../src/misc/ScrollOwner.sol";
 import {Whitelist} from "../../src/L2/predeploys/Whitelist.sol";
 
+import {SystemSignerRegistry} from "../../src/L1/system-contract/SystemSignerRegistry.sol";
+
+
 // solhint-disable max-states-count
 // solhint-disable state-visibility
 // solhint-disable var-name-mixedcase
@@ -81,7 +84,8 @@ contract InitializeL1ScrollOwner is Script {
         configL1GatewayRouter();
         configL1CustomERC20Gateway();
         configL1ERC721Gateway();
-        configL1ERC1155Gateway();
+        configL1ERC1155Gateway();        
+        configSystemContract();
 
         configL1USDCGateway();
         configEnforcedTxGateway();
@@ -272,4 +276,21 @@ contract InitializeL1ScrollOwner is Script {
         owner.updateAccess(L1_ENFORCED_TX_GATEWAY_PROXY_ADDR, _selectors, SCROLL_MULTISIG_NO_DELAY_ROLE, true);
         owner.updateAccess(L1_ENFORCED_TX_GATEWAY_PROXY_ADDR, _selectors, EMERGENCY_MULTISIG_NO_DELAY_ROLE, true);
     }
+
+    function configSystemContract() internal {
+        // If we already have deployed it, just do:
+        SystemSignerRegistry sys = SystemSignerRegistry(SYSTEM_CONTRACT_ADDR);
+
+        // sys has a normal constructor that set the "owner" to `ScrollOwner`.
+        // Now we want to let the Security Council call `addSigner(...)` with no delay.
+        bytes4[] memory selectors = new bytes4[](1);
+        selectors[0] = sys.addSigner.selector;
+
+        owner.updateAccess(
+            SYSTEM_CONTRACT_ADDR,        // the system contract
+            selectors,                   // array of function selectors (onlyOwner)
+            SECURITY_COUNCIL_NO_DELAY_ROLE,
+            true
+        );
+    }
 }