diff --git a/package.json b/package.json
index 8c88226e..8c7635f5 100644
--- a/package.json
+++ b/package.json
@@ -25,11 +25,13 @@
   "devDependencies": {
     "@agoric/internal": "0.4.0-u18.0",
     "@cosmjs/stargate": "^0.28.9",
+    "@endo/eventual-send": "^1.2.8",
     "@subql/cli": "^5.4.0",
     "@subql/node-cosmos": "^4.2.1",
     "@subql/testing": "latest",
     "execa": "^9.5.2",
     "prettier": "^3.4.2",
+    "ses": "^1.10.0",
     "starknet": "6.11.0",
     "typescript": "^5.7.2"
   },
diff --git a/scripts/changePrice.mjs b/scripts/changePrice.mjs
old mode 100644
new mode 100755
index e72900b9..45fbaa7f
--- a/scripts/changePrice.mjs
+++ b/scripts/changePrice.mjs
@@ -1,4 +1,5 @@
 #! /usr/bin/env node
+import './lockdown.mjs';
 import { execa } from 'execa';
 import { assertAllDefined } from '@agoric/internal';
 
diff --git a/scripts/checkLiquidation.mjs b/scripts/checkLiquidation.mjs
index 9b8208ed..008f9ca6 100644
--- a/scripts/checkLiquidation.mjs
+++ b/scripts/checkLiquidation.mjs
@@ -76,7 +76,7 @@ const validate = async ({ apiUrl, maxRetries, retryDuration, expectations, filte
 
       for (const key of Object.keys(expectations)) {
         for (let i = 0; i < nodes.length; i++) {
-          equal(nodes[i][key], expectations[i].key);
+          equal(nodes[i][key], expectations[key][i]);
         }
       }
 
diff --git a/scripts/createVault.mjs b/scripts/createVault.mjs
index 241df2f2..563e1f67 100644
--- a/scripts/createVault.mjs
+++ b/scripts/createVault.mjs
@@ -1,4 +1,5 @@
 #! /usr/bin/env node
+import './lockdown.mjs';
 import { execa } from 'execa';
 import assert from 'node:assert/strict';
 import { assertAllDefined } from '@agoric/internal';
diff --git a/scripts/lockdown.mjs b/scripts/lockdown.mjs
new file mode 100644
index 00000000..76a83b63
--- /dev/null
+++ b/scripts/lockdown.mjs
@@ -0,0 +1,10 @@
+import 'ses';
+import '@endo/eventual-send/shim.js';
+
+const options = {
+  overrideTaming: 'severe',
+  stackFiltering: 'verbose',
+  errorTaming: 'unsafe',
+};
+
+lockdown(options);
diff --git a/scripts/placeBid.mjs b/scripts/placeBid.mjs
index 8ee96e7a..a3e8f847 100644
--- a/scripts/placeBid.mjs
+++ b/scripts/placeBid.mjs
@@ -1,4 +1,5 @@
 #! /usr/bin/env node
+import './lockdown.mjs';
 import { execa } from 'execa';
 import assert from 'node:assert/strict';
 import { assertAllDefined } from '@agoric/internal';
diff --git a/yarn.lock b/yarn.lock
index 9b3c15a8..3d72bb34 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4321,6 +4321,7 @@ __metadata:
   dependencies:
     "@agoric/internal": "npm:0.4.0-u18.0"
     "@cosmjs/stargate": "npm:^0.28.9"
+    "@endo/eventual-send": "npm:^1.2.8"
     "@subql/cli": "npm:^5.4.0"
     "@subql/node-cosmos": "npm:^4.2.1"
     "@subql/testing": "npm:latest"
@@ -4332,6 +4333,7 @@ __metadata:
     js-sha256: "npm:^0.11.0"
     pino: "npm:^7.8.0"
     prettier: "npm:^3.4.2"
+    ses: "npm:^1.10.0"
     starknet: "npm:6.11.0"
     typescript: "npm:^5.7.2"
   languageName: unknown