diff --git a/examples/scroll/scripts/4_setValidator.js b/examples/scroll/scripts/4_setValidator.js
index 8509127..205a2fe 100644
--- a/examples/scroll/scripts/4_setValidator.js
+++ b/examples/scroll/scripts/4_setValidator.js
@@ -53,8 +53,9 @@ task('setValidator', 'Set validator for zkLink')
     let tx = await arbitrator.setValidator(scrollL1GatewayAddr, validatorAddr, isActive, adapterParams, {
       value: hre.ethers.utils.parseEther('0.001'),
     });
-    console.log(`The tx hash: ${tx.hash}`);
+    console.log(`The tx hash: ${tx.hash} , waiting confirm...`);
     await tx.wait();
+    console.log(`The tx confirmed`);
 
     // Waiting for the official Scroll bridge to forward the message to L2
     // No user action is required for follow-up.
diff --git a/script/deploy_arbitrator.js b/script/deploy_arbitrator.js
index 61c8920..d1a4dd8 100644
--- a/script/deploy_arbitrator.js
+++ b/script/deploy_arbitrator.js
@@ -9,6 +9,7 @@ const {
 } = require('./utils');
 const logName = require('./deploy_log_name');
 const { task, types } = require('hardhat/config');
+const { INIT_FEE_PARAMS } = require('./zksync_era');
 
 function getArbitratorContractName(dummy) {
   return dummy ? 'DummyArbitrator' : 'Arbitrator';
@@ -149,3 +150,25 @@ task('setValidatorForEthereum', 'Set validator for ethereum')
     await tx.wait();
     console.log(`The tx confirmed`);
   });
+
+task('setFeeParamsForEthereum', 'Set fee params for ethereum').setAction(async (taskArgs, hardhat) => {
+  const arbitratorAddr = readDeployContract(logName.DEPLOY_ARBITRATOR_LOG_PREFIX, logName.DEPLOY_LOG_ARBITRATOR);
+  if (arbitratorAddr === undefined) {
+    console.log('The arbitrator address not exist');
+    return;
+  }
+  console.log(`The arbitrator address: ${arbitratorAddr}`);
+
+  const ethGatewayAddr = readDeployContract(logName.DEPLOY_ETH_GATEWAY_LOG_PREFIX, logName.DEPLOY_GATEWAY);
+  if (ethGatewayAddr === undefined) {
+    console.log('The eth gateway address not exist');
+    return;
+  }
+  console.log(`The eth gateway address: ${ethGatewayAddr}`);
+
+  const arbitrator = await hardhat.ethers.getContractAt('Arbitrator', arbitratorAddr);
+  let tx = await arbitrator.changeFeeParams(ethGatewayAddr, INIT_FEE_PARAMS, '0x');
+  console.log(`The tx hash: ${tx.hash} , waiting confirm...`);
+  await tx.wait();
+  console.log(`The tx confirmed`);
+});
diff --git a/script/zksync_era.js b/script/zksync_era.js
new file mode 100644
index 0000000..16b3c39
--- /dev/null
+++ b/script/zksync_era.js
@@ -0,0 +1,28 @@
+const ZKSYNC_HOME = process.env.ZKSYNC_HOME;
+if (ZKSYNC_HOME === undefined) {
+  throw Error('ZKSYNC_HOME not config');
+}
+
+const SYSTEM_CONFIG_JSON = require(`${ZKSYNC_HOME}/contracts/SystemConfig.json`);
+
+const SYSTEM_CONFIG = {
+  requiredL2GasPricePerPubdata: SYSTEM_CONFIG_JSON.REQUIRED_L2_GAS_PRICE_PER_PUBDATA,
+  priorityTxMinimalGasPrice: SYSTEM_CONFIG_JSON.PRIORITY_TX_MINIMAL_GAS_PRICE,
+  priorityTxMaxGasPerBatch: SYSTEM_CONFIG_JSON.PRIORITY_TX_MAX_GAS_PER_BATCH,
+  priorityTxPubdataPerBatch: SYSTEM_CONFIG_JSON.PRIORITY_TX_PUBDATA_PER_BATCH,
+  priorityTxBatchOverheadL1Gas: SYSTEM_CONFIG_JSON.PRIORITY_TX_BATCH_OVERHEAD_L1_GAS,
+  priorityTxMaxPubdata: SYSTEM_CONFIG_JSON.PRIORITY_TX_MAX_PUBDATA,
+};
+
+const INIT_FEE_PARAMS = {
+  pubdataPricingMode: 0, // rollup
+  batchOverheadL1Gas: SYSTEM_CONFIG.priorityTxBatchOverheadL1Gas,
+  maxPubdataPerBatch: SYSTEM_CONFIG.priorityTxPubdataPerBatch,
+  priorityTxMaxPubdata: SYSTEM_CONFIG.priorityTxMaxPubdata,
+  maxL2GasPerBatch: SYSTEM_CONFIG.priorityTxMaxGasPerBatch,
+  minimalL2GasPrice: SYSTEM_CONFIG.priorityTxMinimalGasPrice,
+};
+
+module.exports = {
+  INIT_FEE_PARAMS,
+};