feat: config example gas token decimal

Author: yiweichi

docker/config-example.toml

@@ -14,6 +14,7 @@ MAX_L1_MESSAGE_GAS_LIMIT = 10000000
 L1_CONTRACT_DEPLOYMENT_BLOCK = 0
 
 ALTERNATIVE_GAS_TOKEN_ENABLED = true
+# EXAMPLE_GAS_TOKEN_DECIMAL = 6
 
 TEST_ENV_MOCK_FINALIZE_ENABLED = true
 TEST_ENV_MOCK_FINALIZE_TIMEOUT_SEC = 3600

scripts/deterministic/DeployScroll.s.sol

@@ -80,6 +80,8 @@ contract ScrollStandardERC20FactorySetOwner is ScrollStandardERC20Factory {
 }
 
 contract DeployScroll is DeterminsticDeployment {
+    using stdToml for string;
+
     /*********
      * Types *
      *********/
@@ -639,10 +641,16 @@ contract DeployScroll is DeterminsticDeployment {
     }
 
     function deployGasToken() private gasToken(true) {
+        uint8 decimal = 18;
+        string memory key = ".general.EXAMPLE_GAS_TOKEN_DECIMAL";
+        if (vm.keyExistsToml(cfg, key)) {
+            decimal = uint8(cfg.readUint(key));
+        }
+
         bytes memory args = abi.encode(
             "ScrollGasToken", // _name
             "GasToken", // _symbol
-            18, // _decimals
+            decimal, // _decimals
             DEPLOYER_ADDR, // _recipient
             10**28 // _amount
         );