diff --git a/scenarios/grpc.js b/scenarios/grpc.js
index 75d9622..623e17c 100644
--- a/scenarios/grpc.js
+++ b/scenarios/grpc.js
@@ -1,71 +1,69 @@
-import native from 'k6/x/frostfs/native';
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
 import logging from 'k6/x/frostfs/logging';
+import native from 'k6/x/frostfs/native';
 import registry from 'k6/x/frostfs/registry';
 import stats from 'k6/x/frostfs/stats';
-import { SharedArray } from 'k6/data';
-import { sleep } from 'k6';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const container_list = new SharedArray('container_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
+const container_list = new SharedArray('container_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Select random gRPC endpoint for current VU
 const grpc_endpoints = __ENV.GRPC_ENDPOINTS.split(',');
-const grpc_endpoint = grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
-const grpc_client = native.connect(grpc_endpoint, '',
-    __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
+const grpc_endpoint =
+    grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
+const grpc_client = native.connect(
+    grpc_endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
     __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
-    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === "true" : false);
-const log = logging.new().withField("endpoint", grpc_endpoint);
+    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' :
+                            false);
+const log = logging.new().withField('endpoint', grpc_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const delete_age = __ENV.DELETE_AGE ? parseInt(__ENV.DELETE_AGE) : undefined;
 let obj_to_delete_selector = undefined;
 if (registry_enabled && delete_age) {
-    obj_to_delete_selector = registry.getSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_delete",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: delete_age,
-        }
-    );
+  obj_to_delete_selector = registry.getSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_delete',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: delete_age,
+      });
 }
 
 const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
 let obj_to_read_selector = undefined;
 if (registry_enabled) {
-    obj_to_read_selector = registry.getLoopedSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_read",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: read_age,
-        }
-    )
+  obj_to_read_selector = registry.getLoopedSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_read',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: read_age,
+      })
 }
 
 const scenarios = {};
@@ -74,138 +72,141 @@ const write_vu_count = parseInt(__ENV.WRITERS || '0');
 const write_grpc_chunk_size = 1024 * parseInt(__ENV.GRPC_CHUNK_SIZE || '0')
 const generator = newGenerator(write_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 const read_vu_count = parseInt(__ENV.READERS || '0');
 if (read_vu_count > 0) {
-    scenarios.read = {
-        executor: 'constant-vus',
-        vus: read_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-vus',
+    vus: read_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 const delete_vu_count = parseInt(__ENV.DELETERS || '0');
 if (delete_vu_count > 0) {
-    if (!obj_to_delete_selector) {
-        throw new Error('Positive DELETE worker number without a proper object selector');
-    }
+  if (!obj_to_delete_selector) {
+    throw new Error(
+        'Positive DELETE worker number without a proper object selector');
+  }
 
-    scenarios.delete = {
-        executor: 'constant-vus',
-        vus: delete_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_delete', 
-        gracefulStop: '5s',
-    };
+  scenarios.delete = {
+    executor: 'constant-vus',
+    vus: delete_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_delete',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
+  const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
 
-    console.log(`Pregenerated containers:       ${container_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Reading VUs:                   ${read_vu_count}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Deleting VUs:                  ${delete_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
-    
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  console.log(`Pregenerated containers:       ${container_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Reading VUs:                   ${read_vu_count}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Deleting VUs:                  ${delete_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
+
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
 export function obj_write() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const headers = {
-        unique_header: uuidv4()
-    };
-    const container = container_list[Math.floor(Math.random() * container_list.length)];
+  const headers = {unique_header: uuidv4()};
+  const container =
+      container_list[Math.floor(Math.random() * container_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = grpc_client.put(container, headers, payload, write_grpc_chunk_size);
-    if (!resp.success) {
-        log.withField("cid", container).error(resp.error);
-        return;
-    }
+  const payload = generator.genPayload();
+  const resp =
+      grpc_client.put(container, headers, payload, write_grpc_chunk_size);
+  if (!resp.success) {
+    log.withField('cid', container).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject(container, resp.object_id, "", "", payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject(container, resp.object_id, '', '', payload.hash());
+  }
 }
 
 export function obj_read() {
-    if (__ENV.SLEEP_READ) {
-        sleep(__ENV.SLEEP_READ);
-    }
+  if (__ENV.SLEEP_READ) {
+    sleep(__ENV.SLEEP_READ);
+  }
 
-    if(obj_to_read_selector) {
-        const obj = obj_to_read_selector.nextObject();
-        if (!obj) {
-            return;
-        }
-        const resp = grpc_client.get(obj.c_id, obj.o_id)
-        if (!resp.success) {
-            log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
-        }
-        return
+  if (obj_to_read_selector) {
+    const obj = obj_to_read_selector.nextObject();
+    if (!obj) {
+      return;
     }
-
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-    const resp = grpc_client.get(obj.container, obj.object)
+    const resp = grpc_client.get(obj.c_id, obj.o_id)
     if (!resp.success) {
-        log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
+      log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
     }
+    return
+  }
+
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+  const resp = grpc_client.get(obj.container, obj.object)
+  if (!resp.success) {
+    log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
+  }
 }
 
 export function obj_delete() {
-    if (__ENV.SLEEP_DELETE) {
-        sleep(__ENV.SLEEP_DELETE);
-    }
+  if (__ENV.SLEEP_DELETE) {
+    sleep(__ENV.SLEEP_DELETE);
+  }
 
-    const obj = obj_to_delete_selector.nextObject();
-    if (!obj) {
-        return;
-    }
+  const obj = obj_to_delete_selector.nextObject();
+  if (!obj) {
+    return;
+  }
 
-    const resp = grpc_client.delete(obj.c_id, obj.o_id);
-    if (!resp.success) {
-        // Log errors except (2052 - object already deleted)
-        log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
-        return;
-    }
+  const resp = grpc_client.delete(obj.c_id, obj.o_id);
+  if (!resp.success) {
+    // Log errors except (2052 - object already deleted)
+    log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
+    return;
+  }
 
-    obj_registry.deleteObject(obj.id);
+  obj_registry.deleteObject(obj.id);
 }
diff --git a/scenarios/grpc_car.js b/scenarios/grpc_car.js
index 752e76a..8ee5d46 100644
--- a/scenarios/grpc_car.js
+++ b/scenarios/grpc_car.js
@@ -1,71 +1,69 @@
-import native from 'k6/x/frostfs/native';
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
 import logging from 'k6/x/frostfs/logging';
+import native from 'k6/x/frostfs/native';
 import registry from 'k6/x/frostfs/registry';
 import stats from 'k6/x/frostfs/stats';
-import { SharedArray } from 'k6/data';
-import { sleep } from 'k6';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const container_list = new SharedArray('container_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
+const container_list = new SharedArray('container_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Select random gRPC endpoint for current VU
 const grpc_endpoints = __ENV.GRPC_ENDPOINTS.split(',');
-const grpc_endpoint = grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
-const grpc_client = native.connect(grpc_endpoint, '',
-    __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
+const grpc_endpoint =
+    grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
+const grpc_client = native.connect(
+    grpc_endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
     __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
-    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === "true" : false);
-const log = logging.new().withField("endpoint", grpc_endpoint);
+    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' :
+                            false);
+const log = logging.new().withField('endpoint', grpc_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const delete_age = __ENV.DELETE_AGE ? parseInt(__ENV.DELETE_AGE) : undefined;
 let obj_to_delete_selector = undefined;
 if (registry_enabled && delete_age) {
-    obj_to_delete_selector = registry.getSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_delete",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: delete_age,
-        }
-    );
+  obj_to_delete_selector = registry.getSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_delete',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: delete_age,
+      });
 }
 
 const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
 let obj_to_read_selector = undefined;
 if (registry_enabled) {
-    obj_to_read_selector = registry.getLoopedSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_read",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: read_age,
-        }
-    )
+  obj_to_read_selector = registry.getLoopedSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_read',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: read_age,
+      })
 }
 
 const scenarios = {};
@@ -77,160 +75,164 @@ const write_rate = parseInt(__ENV.WRITE_RATE || '0');
 const write_grpc_chunk_size = 1024 * parseInt(__ENV.GRPC_CHUNK_SIZE || '0')
 const generator = newGenerator(write_rate > 0);
 if (write_rate > 0) {
-    scenarios.write = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_write_vus,
-        maxVUs: max_write_vus,
-        rate: write_rate,
-        timeUnit: time_unit,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_write_vus,
+    maxVUs: max_write_vus,
+    rate: write_rate,
+    timeUnit: time_unit,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 const pre_alloc_read_vus = parseInt(__ENV.PRE_ALLOC_READERS || '0');
 const max_read_vus = parseInt(__ENV.MAX_READERS || pre_alloc_read_vus);
 const read_rate = parseInt(__ENV.READ_RATE || '0');
 if (read_rate > 0) {
-    scenarios.read = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_write_vus,
-        maxVUs: max_read_vus,
-        rate: read_rate,
-        timeUnit: time_unit,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_write_vus,
+    maxVUs: max_read_vus,
+    rate: read_rate,
+    timeUnit: time_unit,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 const pre_alloc_delete_vus = parseInt(__ENV.PRE_ALLOC_DELETERS || '0');
 const max_delete_vus = parseInt(__ENV.MAX_DELETERS || pre_alloc_write_vus);
 const delete_rate = parseInt(__ENV.DELETE_RATE || '0');
 if (delete_rate > 0) {
-    if (!obj_to_delete_selector) {
-        throw new Error('Positive DELETE worker number without a proper object selector');
-    }
+  if (!obj_to_delete_selector) {
+    throw new Error(
+        'Positive DELETE worker number without a proper object selector');
+  }
 
-    scenarios.delete = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_delete_vus,
-        maxVUs: max_delete_vus,
-        rate: delete_rate,
-        timeUnit: time_unit,
-        exec: 'obj_delete', 
-        gracefulStop: '5s',
-    };
+  scenarios.delete = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_delete_vus,
+    maxVUs: max_delete_vus,
+    rate: delete_rate,
+    timeUnit: time_unit,
+    exec: 'obj_delete',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_pre_allocated_vu_count = pre_alloc_write_vus + pre_alloc_read_vus + pre_alloc_delete_vus;
-    const total_max_vu_count = max_read_vus + max_write_vus + max_delete_vus
+  const total_pre_allocated_vu_count =
+      pre_alloc_write_vus + pre_alloc_read_vus + pre_alloc_delete_vus;
+  const total_max_vu_count = max_read_vus + max_write_vus + max_delete_vus
 
-    console.log(`Pregenerated containers:       ${container_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Pre allocated reading VUs:     ${pre_alloc_read_vus}`);
-    console.log(`Pre allocated writing VUs:     ${pre_alloc_write_vus}`);
-    console.log(`Pre allocated deleting VUs:    ${pre_alloc_delete_vus}`);
-    console.log(`Total pre allocated VUs:       ${total_pre_allocated_vu_count}`);
-    console.log(`Max reading VUs:               ${max_read_vus}`);
-    console.log(`Max writing VUs:               ${max_write_vus}`);
-    console.log(`Max deleting VUs:              ${max_delete_vus}`);
-    console.log(`Total max VUs:                 ${total_max_vu_count}`);
-    console.log(`Time unit:                     ${time_unit}`);
-    console.log(`Read rate:                     ${read_rate}`);
-    console.log(`Writing rate:                  ${write_rate}`);
-    console.log(`Delete rate:                   ${delete_rate}`);
-    
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  console.log(`Pregenerated containers:       ${container_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Pre allocated reading VUs:     ${pre_alloc_read_vus}`);
+  console.log(`Pre allocated writing VUs:     ${pre_alloc_write_vus}`);
+  console.log(`Pre allocated deleting VUs:    ${pre_alloc_delete_vus}`);
+  console.log(`Total pre allocated VUs:       ${total_pre_allocated_vu_count}`);
+  console.log(`Max reading VUs:               ${max_read_vus}`);
+  console.log(`Max writing VUs:               ${max_write_vus}`);
+  console.log(`Max deleting VUs:              ${max_delete_vus}`);
+  console.log(`Total max VUs:                 ${total_max_vu_count}`);
+  console.log(`Time unit:                     ${time_unit}`);
+  console.log(`Read rate:                     ${read_rate}`);
+  console.log(`Writing rate:                  ${write_rate}`);
+  console.log(`Delete rate:                   ${delete_rate}`);
+
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
 export function obj_write() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const headers = {
-        unique_header: uuidv4()
-    };
-    const container = container_list[Math.floor(Math.random() * container_list.length)];
+  const headers = {unique_header: uuidv4()};
+  const container =
+      container_list[Math.floor(Math.random() * container_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = grpc_client.put(container, headers, payload, write_grpc_chunk_size);
-    if (!resp.success) {
-        log.withField("cid", container).error(resp.error);
-        return;
-    }
+  const payload = generator.genPayload();
+  const resp =
+      grpc_client.put(container, headers, payload, write_grpc_chunk_size);
+  if (!resp.success) {
+    log.withField('cid', container).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject(container, resp.object_id, "", "", payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject(container, resp.object_id, '', '', payload.hash());
+  }
 }
 
 export function obj_read() {
-    if (__ENV.SLEEP_READ) {
-        sleep(__ENV.SLEEP_READ);
-    }
+  if (__ENV.SLEEP_READ) {
+    sleep(__ENV.SLEEP_READ);
+  }
 
-    if(obj_to_read_selector) {
-        const obj = obj_to_read_selector.nextObject();
-        if (!obj) {
-            return;
-        }
-        const resp = grpc_client.get(obj.c_id, obj.o_id)
-        if (!resp.success) {
-            log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
-        }
-        return
+  if (obj_to_read_selector) {
+    const obj = obj_to_read_selector.nextObject();
+    if (!obj) {
+      return;
     }
-
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-    const resp = grpc_client.get(obj.container, obj.object)
+    const resp = grpc_client.get(obj.c_id, obj.o_id)
     if (!resp.success) {
-        log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
+      log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
     }
+    return
+  }
+
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+  const resp = grpc_client.get(obj.container, obj.object)
+  if (!resp.success) {
+    log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
+  }
 }
 
 export function obj_delete() {
-    if (__ENV.SLEEP_DELETE) {
-        sleep(__ENV.SLEEP_DELETE);
-    }
+  if (__ENV.SLEEP_DELETE) {
+    sleep(__ENV.SLEEP_DELETE);
+  }
 
-    const obj = obj_to_delete_selector.nextObject();
-    if (!obj) {
-        return;
-    }
+  const obj = obj_to_delete_selector.nextObject();
+  if (!obj) {
+    return;
+  }
 
-    const resp = grpc_client.delete(obj.c_id, obj.o_id);
-    if (!resp.success) {
-        // Log errors except (2052 - object already deleted)
-        log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
-        return;
-    }
+  const resp = grpc_client.delete(obj.c_id, obj.o_id);
+  if (!resp.success) {
+    // Log errors except (2052 - object already deleted)
+    log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
+    return;
+  }
 
-    obj_registry.deleteObject(obj.id);
+  obj_registry.deleteObject(obj.id);
 }
diff --git a/scenarios/http.js b/scenarios/http.js
index f96c0af..801c31c 100644
--- a/scenarios/http.js
+++ b/scenarios/http.js
@@ -1,39 +1,42 @@
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
+import http from 'k6/http';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import stats from 'k6/x/frostfs/stats';
-import http from 'k6/http';
-import { SharedArray } from 'k6/data';
-import { sleep } from 'k6';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const container_list = new SharedArray('container_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
+const container_list = new SharedArray('container_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Select random HTTP endpoint for current VU
 const http_endpoints = __ENV.HTTP_ENDPOINTS.split(',');
-const http_endpoint = http_endpoints[Math.floor(Math.random() * http_endpoints.length)];
-const log = logging.new().withField("endpoint", http_endpoint);
+const http_endpoint =
+    http_endpoints[Math.floor(Math.random() * http_endpoints.length)];
+const log = logging.new().withField('endpoint', http_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const scenarios = {};
@@ -41,94 +44,100 @@ const scenarios = {};
 const write_vu_count = parseInt(__ENV.WRITERS || '0');
 const generator = newGenerator(write_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    }
+  scenarios.write = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  }
 }
 
 const read_vu_count = parseInt(__ENV.READERS || '0');
 if (read_vu_count > 0) {
-    scenarios.read = {
-        executor: 'constant-vus',
-        vus: read_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    }
+  scenarios.read = {
+    executor: 'constant-vus',
+    vus: read_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  }
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count + read_vu_count;
+  const total_vu_count = write_vu_count + read_vu_count;
 
-    console.log(`Pregenerated containers:       ${container_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Reading VUs:                   ${read_vu_count}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
+  console.log(`Pregenerated containers:       ${container_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Reading VUs:                   ${read_vu_count}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
 
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
 export function obj_write() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const container = container_list[Math.floor(Math.random() * container_list.length)];
+  const container =
+      container_list[Math.floor(Math.random() * container_list.length)];
 
-    const payload = generator.genPayload();
-    const data = {
-        field: uuidv4(),
-        // Because we use `file` wrapping and it is not straightforward to use streams here,
-        // `-e STREAMING=1` has no effect for this scenario.
-        file: http.file(payload.bytes(), "random.data"),
-    };
+  const payload = generator.genPayload();
+  const data = {
+    field: uuidv4(),
+    // Because we use `file` wrapping and it is not straightforward to use
+    // streams here,
+    // `-e STREAMING=1` has no effect for this scenario.
+    file: http.file(payload.bytes(), 'random.data'),
+  };
 
-    const resp = http.post(`http://${http_endpoint}/upload/${container}`, data);
-    if (resp.status != 200) {
-        log.withFields({status: resp.status, cid: container}).error(resp.error);
-        return;
-    }
-    const object_id = JSON.parse(resp.body).object_id;
-    if (obj_registry) {
-        obj_registry.addObject(container, object_id, "", "", payload.hash());
-    }
+  const resp = http.post(`http://${http_endpoint}/upload/${container}`, data);
+  if (resp.status != 200) {
+    log.withFields({status: resp.status, cid: container}).error(resp.error);
+    return;
+  }
+  const object_id = JSON.parse(resp.body).object_id;
+  if (obj_registry) {
+    obj_registry.addObject(container, object_id, '', '', payload.hash());
+  }
 }
 
 export function obj_read() {
-    if (__ENV.SLEEP_READ) {
-        sleep(__ENV.SLEEP_READ);
-    }
+  if (__ENV.SLEEP_READ) {
+    sleep(__ENV.SLEEP_READ);
+  }
 
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-    const resp = http.get(`http://${http_endpoint}/get/${obj.container}/${obj.object}`);
-    if (resp.status != 200) {
-        log.withFields({status: resp.status, cid: obj.container, oid: obj.object}).error(resp.error);
-    }
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+  const resp =
+      http.get(`http://${http_endpoint}/get/${obj.container}/${obj.object}`);
+  if (resp.status != 200) {
+    log.withFields({status: resp.status, cid: obj.container, oid: obj.object})
+        .error(resp.error);
+  }
 }
diff --git a/scenarios/local.js b/scenarios/local.js
index 0630304..7b3f003 100644
--- a/scenarios/local.js
+++ b/scenarios/local.js
@@ -1,55 +1,57 @@
+import {SharedArray} from 'k6/data';
+import exec from 'k6/execution';
 import local from 'k6/x/frostfs/local';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import stats from 'k6/x/frostfs/stats';
-import { SharedArray } from 'k6/data';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import exec from 'k6/execution';
-import { newGenerator } from './libs/datagen.js';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const container_list = new SharedArray('container_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
+const container_list = new SharedArray('container_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 const config_file = __ENV.CONFIG_FILE;
 const config_dir = __ENV.CONFIG_DIR;
 const debug_logger = (__ENV.DEBUG_LOGGER || 'false') == 'true';
-const max_total_size_gb = __ENV.MAX_TOTAL_SIZE_GB ? parseInt(__ENV.MAX_TOTAL_SIZE_GB) : 0;
-const local_client = local.connect(config_file, config_dir, '', debug_logger, max_total_size_gb);
-const log = logging.new().withFields({"config_file": config_file,"config_dir": config_dir});
+const max_total_size_gb =
+    __ENV.MAX_TOTAL_SIZE_GB ? parseInt(__ENV.MAX_TOTAL_SIZE_GB) : 0;
+const local_client =
+    local.connect(config_file, config_dir, '', debug_logger, max_total_size_gb);
+const log = logging.new().withFields(
+    {'config_file': config_file, 'config_dir': config_dir});
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const delete_age = __ENV.DELETE_AGE ? parseInt(__ENV.DELETE_AGE) : undefined;
 let obj_to_delete_selector = undefined;
 if (registry_enabled && delete_age) {
-    obj_to_delete_selector = registry.getSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_delete",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: delete_age,
-        }
-    );
+  obj_to_delete_selector = registry.getSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_delete',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: delete_age,
+      });
 }
 
 const scenarios = {};
@@ -57,117 +59,119 @@ const scenarios = {};
 const write_vu_count = parseInt(__ENV.WRITERS || '0');
 const generator = newGenerator(write_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 const read_vu_count = parseInt(__ENV.READERS || '0');
 if (read_vu_count > 0) {
-    scenarios.read = {
-        executor: 'constant-vus',
-        vus: read_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-vus',
+    vus: read_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 const delete_vu_count = parseInt(__ENV.DELETERS || '0');
 if (delete_vu_count > 0) {
-    if (!obj_to_delete_selector) {
-        throw new Error('Positive DELETE worker number without a proper object selector');
-    }
+  if (!obj_to_delete_selector) {
+    throw new Error(
+        'Positive DELETE worker number without a proper object selector');
+  }
 
-    scenarios.delete = {
-        executor: 'constant-vus',
-        vus: delete_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_delete', 
-        gracefulStop: '5s',
-    };
+  scenarios.delete = {
+    executor: 'constant-vus',
+    vus: delete_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_delete',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
+  const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
 
-    console.log(`Pregenerated containers:       ${container_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Reading VUs:                   ${read_vu_count}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Deleting VUs:                  ${delete_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
+  console.log(`Pregenerated containers:       ${container_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Reading VUs:                   ${read_vu_count}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Deleting VUs:                  ${delete_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
 
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
 export function obj_write() {
-    const headers = {
-        unique_header: uuidv4()
-    };
-    const container = container_list[Math.floor(Math.random() * container_list.length)];
+  const headers = {unique_header: uuidv4()};
+  const container =
+      container_list[Math.floor(Math.random() * container_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = local_client.put(container, headers, payload);
-    if (!resp.success) {
-        if (resp.abort) {
-            exec.test.abort(resp.error);
-        }
-        log.withField("cid", container).error(resp.error);
-        return;
+  const payload = generator.genPayload();
+  const resp = local_client.put(container, headers, payload);
+  if (!resp.success) {
+    if (resp.abort) {
+      exec.test.abort(resp.error);
     }
+    log.withField('cid', container).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject(container, resp.object_id, "", "", payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject(container, resp.object_id, '', '', payload.hash());
+  }
 }
 
 export function obj_read() {
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-    const resp = local_client.get(obj.container, obj.object)
-    if (!resp.success) {
-        log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
-    }
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+  const resp = local_client.get(obj.container, obj.object)
+  if (!resp.success) {
+    log.withFields({cid: obj.container, oid: obj.object}).error(resp.error);
+  }
 }
 
 export function obj_delete() {
-    const obj = obj_to_delete_selector.nextObject();
-    if (!obj) {
-        return;
-    }
+  const obj = obj_to_delete_selector.nextObject();
+  if (!obj) {
+    return;
+  }
 
-    const resp = local_client.delete(obj.c_id, obj.o_id);
-    if (!resp.success) {
-        // Log errors except (2052 - object already deleted)
-        log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
-        return;
-    }
+  const resp = local_client.delete(obj.c_id, obj.o_id);
+  if (!resp.success) {
+    // Log errors except (2052 - object already deleted)
+    log.withFields({cid: obj.c_id, oid: obj.o_id}).error(resp.error);
+    return;
+  }
 
-    obj_registry.deleteObject(obj.id);
+  obj_registry.deleteObject(obj.id);
 }
diff --git a/scenarios/s3.js b/scenarios/s3.js
index 7da53b9..0532748 100644
--- a/scenarios/s3.js
+++ b/scenarios/s3.js
@@ -1,70 +1,69 @@
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
-import stats from 'k6/x/frostfs/stats';
 import s3 from 'k6/x/frostfs/s3';
-import { SharedArray } from 'k6/data';
-import { sleep } from 'k6';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
+import stats from 'k6/x/frostfs/stats';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const bucket_list = new SharedArray('bucket_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
+const bucket_list = new SharedArray('bucket_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-const no_verify_ssl = __ENV.NO_VERIFY_SSL || "true";
-const connection_args = {no_verify_ssl: no_verify_ssl}
+const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
+const connection_args = {
+  no_verify_ssl: no_verify_ssl
+}
 // Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint = s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
+const s3_endpoint =
+    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
 const s3_client = s3.connect(s3_endpoint, connection_args);
-const log = logging.new().withField("endpoint", s3_endpoint);
+const log = logging.new().withField('endpoint', s3_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const delete_age = __ENV.DELETE_AGE ? parseInt(__ENV.DELETE_AGE) : undefined;
 let obj_to_delete_selector = undefined;
 if (registry_enabled && delete_age) {
-    obj_to_delete_selector = registry.getSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_delete",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: delete_age,
-        }
-    );
+  obj_to_delete_selector = registry.getSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_delete',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: delete_age,
+      });
 }
 
 const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
 let obj_to_read_selector = undefined;
 if (registry_enabled) {
-    obj_to_read_selector = registry.getLoopedSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_read",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: read_age,
-        }
-    )
+  obj_to_read_selector = registry.getLoopedSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_read',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: read_age,
+      })
 }
 
 const scenarios = {};
@@ -72,136 +71,140 @@ const scenarios = {};
 const write_vu_count = parseInt(__ENV.WRITERS || '0');
 const generator = newGenerator(write_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 const read_vu_count = parseInt(__ENV.READERS || '0');
 if (read_vu_count > 0) {
-    scenarios.read = {
-        executor: 'constant-vus',
-        vus: read_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-vus',
+    vus: read_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 const delete_vu_count = parseInt(__ENV.DELETERS || '0');
 if (delete_vu_count > 0) {
-    if (!obj_to_delete_selector) {
-        throw 'Positive DELETE worker number without a proper object selector';
-    }
+  if (!obj_to_delete_selector) {
+    throw 'Positive DELETE worker number without a proper object selector';
+  }
 
-    scenarios.delete = {
-        executor: 'constant-vus',
-        vus: delete_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_delete', 
-        gracefulStop: '5s',
-    };
+  scenarios.delete = {
+    executor: 'constant-vus',
+    vus: delete_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_delete',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
+  const total_vu_count = write_vu_count + read_vu_count + delete_vu_count;
 
-    console.log(`Pregenerated buckets:          ${bucket_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Reading VUs:                   ${read_vu_count}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Deleting VUs:                  ${delete_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
-    
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  console.log(`Pregenerated buckets:          ${bucket_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Reading VUs:                   ${read_vu_count}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Deleting VUs:                  ${delete_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
+
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
-  }
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
+}
 
 export function obj_write() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const key = __ENV.OBJ_NAME || uuidv4();
-    const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
+  const key = __ENV.OBJ_NAME || uuidv4();
+  const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = s3_client.put(bucket, key, payload);
-    if (!resp.success) {
-        log.withFields({bucket: bucket, key: key}).error(resp.error);
-        return;
-    }
+  const payload = generator.genPayload();
+  const resp = s3_client.put(bucket, key, payload);
+  if (!resp.success) {
+    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject("", "", bucket, key, payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject('', '', bucket, key, payload.hash());
+  }
 }
 
 export function obj_read() {
-    if (__ENV.SLEEP_READ) {
-        sleep(__ENV.SLEEP_READ);
+  if (__ENV.SLEEP_READ) {
+    sleep(__ENV.SLEEP_READ);
+  }
+
+  if (obj_to_read_selector) {
+    const obj = obj_to_read_selector.nextObject();
+    if (!obj) {
+      return;
     }
-
-    if(obj_to_read_selector) {
-        const obj = obj_to_read_selector.nextObject();
-        if (!obj) {
-            return;
-        }
-        const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
-        if (!resp.success) {
-            log.withFields({bucket: obj.s3_bucket, key: obj.s3_key}).error(resp.error);
-        }
-        return
-    }
-
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-
-    const resp = s3_client.get(obj.bucket, obj.object);
+    const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
     if (!resp.success) {
-        log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
-    } 
+      log.withFields({bucket: obj.s3_bucket, key: obj.s3_key})
+          .error(resp.error);
+    }
+    return
+  }
+
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+
+  const resp = s3_client.get(obj.bucket, obj.object);
+  if (!resp.success) {
+    log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
+  }
 }
 
 export function obj_delete() {
-    if (__ENV.SLEEP_DELETE) {
-        sleep(__ENV.SLEEP_DELETE);
-    }
+  if (__ENV.SLEEP_DELETE) {
+    sleep(__ENV.SLEEP_DELETE);
+  }
 
-    const obj = obj_to_delete_selector.nextObject();
-    if (!obj) {
-        return;
-    }
+  const obj = obj_to_delete_selector.nextObject();
+  if (!obj) {
+    return;
+  }
 
-    const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
-    if (!resp.success) {
-        log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: "DELETE"}).error(resp.error);
-        return;
-    }
+  const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
+  if (!resp.success) {
+    log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: 'DELETE'})
+        .error(resp.error);
+    return;
+  }
 
-    obj_registry.deleteObject(obj.id);
+  obj_registry.deleteObject(obj.id);
 }
diff --git a/scenarios/s3_car.js b/scenarios/s3_car.js
index 6666eee..2aaa94e 100644
--- a/scenarios/s3_car.js
+++ b/scenarios/s3_car.js
@@ -1,70 +1,69 @@
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
-import stats from 'k6/x/frostfs/stats';
 import s3 from 'k6/x/frostfs/s3';
-import { SharedArray } from 'k6/data';
-import { sleep } from 'k6';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
+import stats from 'k6/x/frostfs/stats';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const bucket_list = new SharedArray('bucket_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
+const bucket_list = new SharedArray('bucket_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
 });
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint = s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
-const no_verify_ssl = __ENV.NO_VERIFY_SSL || "true";
-const connection_args = {no_verify_ssl: no_verify_ssl}
+const s3_endpoint =
+    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
+const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
+const connection_args = {
+  no_verify_ssl: no_verify_ssl
+};
 const s3_client = s3.connect(s3_endpoint, connection_args);
-const log = logging.new().withField("endpoint", s3_endpoint);
+const log = logging.new().withField('endpoint', s3_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const delete_age = __ENV.DELETE_AGE ? parseInt(__ENV.DELETE_AGE) : undefined;
 let obj_to_delete_selector = undefined;
 if (registry_enabled && delete_age) {
-    obj_to_delete_selector = registry.getSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_delete",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: delete_age,
-        }
-    );
+  obj_to_delete_selector = registry.getSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_delete',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: delete_age,
+      });
 }
 
 const read_age = __ENV.READ_AGE ? parseInt(__ENV.READ_AGE) : 10;
 let obj_to_read_selector = undefined;
 if (registry_enabled) {
-    obj_to_read_selector = registry.getLoopedSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_read",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-            age: read_age,
-        }
-    )
+  obj_to_read_selector = registry.getLoopedSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_read',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+        age: read_age,
+      })
 }
 
 const scenarios = {};
@@ -75,16 +74,16 @@ const max_write_vus = parseInt(__ENV.MAX_WRITERS || pre_alloc_write_vus);
 const write_rate = parseInt(__ENV.WRITE_RATE || '0');
 const generator = newGenerator(write_rate > 0);
 if (write_rate > 0) {
-    scenarios.write = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_write_vus,
-        maxVUs: max_write_vus,
-        rate: write_rate,
-        timeUnit: time_unit,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_write_vus,
+    maxVUs: max_write_vus,
+    rate: write_rate,
+    timeUnit: time_unit,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 
@@ -92,16 +91,16 @@ const pre_alloc_read_vus = parseInt(__ENV.PRE_ALLOC_READERS || '0');
 const max_read_vus = parseInt(__ENV.MAX_READERS || pre_alloc_read_vus);
 const read_rate = parseInt(__ENV.READ_RATE || '0');
 if (read_rate > 0) {
-    scenarios.read = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_write_vus,
-        maxVUs: max_read_vus,
-        rate: read_rate,
-        timeUnit: time_unit,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_write_vus,
+    maxVUs: max_read_vus,
+    rate: read_rate,
+    timeUnit: time_unit,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 
@@ -109,126 +108,132 @@ const pre_alloc_delete_vus = parseInt(__ENV.PRE_ALLOC_DELETERS || '0');
 const max_delete_vus = parseInt(__ENV.MAX_DELETERS || pre_alloc_write_vus);
 const delete_rate = parseInt(__ENV.DELETE_RATE || '0');
 if (delete_rate > 0) {
-    if (!obj_to_delete_selector) {
-        throw new Error('Positive DELETE worker number without a proper object selector');
-    }
+  if (!obj_to_delete_selector) {
+    throw new Error(
+        'Positive DELETE worker number without a proper object selector');
+  }
 
-    scenarios.delete = {
-        executor: 'constant-arrival-rate',
-        duration: `${duration}s`,
-        preAllocatedVUs: pre_alloc_delete_vus,
-        maxVUs: max_delete_vus,
-        rate: delete_rate,
-        timeUnit: time_unit,
-        exec: 'obj_delete', 
-        gracefulStop: '5s',
-    };
+  scenarios.delete = {
+    executor: 'constant-arrival-rate',
+    duration: `${duration}s`,
+    preAllocatedVUs: pre_alloc_delete_vus,
+    maxVUs: max_delete_vus,
+    rate: delete_rate,
+    timeUnit: time_unit,
+    exec: 'obj_delete',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_pre_allocated_vu_count = pre_alloc_write_vus + pre_alloc_read_vus + pre_alloc_delete_vus;
-    const total_max_vu_count = max_read_vus + max_write_vus + max_delete_vus
+  const total_pre_allocated_vu_count =
+      pre_alloc_write_vus + pre_alloc_read_vus + pre_alloc_delete_vus;
+  const total_max_vu_count = max_read_vus + max_write_vus + max_delete_vus
 
-    console.log(`Pregenerated buckets:          ${bucket_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Pre allocated reading VUs:     ${pre_alloc_read_vus}`);
-    console.log(`Pre allocated writing VUs:     ${pre_alloc_write_vus}`);
-    console.log(`Pre allocated deleting VUs:    ${pre_alloc_delete_vus}`);
-    console.log(`Total pre allocated VUs:       ${total_pre_allocated_vu_count}`);
-    console.log(`Max reading VUs:               ${max_read_vus}`);
-    console.log(`Max writing VUs:               ${max_write_vus}`);
-    console.log(`Max deleting VUs:              ${max_delete_vus}`);
-    console.log(`Total max VUs:                 ${total_max_vu_count}`);
-    console.log(`Time unit:                     ${time_unit}`);
-    console.log(`Read rate:                     ${read_rate}`);
-    console.log(`Writing rate:                  ${write_rate}`);
-    console.log(`Delete rate:                   ${delete_rate}`);
+  console.log(`Pregenerated buckets:          ${bucket_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Pre allocated reading VUs:     ${pre_alloc_read_vus}`);
+  console.log(`Pre allocated writing VUs:     ${pre_alloc_write_vus}`);
+  console.log(`Pre allocated deleting VUs:    ${pre_alloc_delete_vus}`);
+  console.log(`Total pre allocated VUs:       ${total_pre_allocated_vu_count}`);
+  console.log(`Max reading VUs:               ${max_read_vus}`);
+  console.log(`Max writing VUs:               ${max_write_vus}`);
+  console.log(`Max deleting VUs:              ${max_delete_vus}`);
+  console.log(`Total max VUs:                 ${total_max_vu_count}`);
+  console.log(`Time unit:                     ${time_unit}`);
+  console.log(`Read rate:                     ${read_rate}`);
+  console.log(`Writing rate:                  ${write_rate}`);
+  console.log(`Delete rate:                   ${delete_rate}`);
 
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
-  }
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
+}
 
 export function obj_write() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const key = __ENV.OBJ_NAME || uuidv4();
-    const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
+  const key = __ENV.OBJ_NAME || uuidv4();
+  const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = s3_client.put(bucket, key, payload);
-    if (!resp.success) {
-        log.withFields({bucket: bucket, key: key}).error(resp.error);
-        return;
-    }
+  const payload = generator.genPayload();
+  const resp = s3_client.put(bucket, key, payload);
+  if (!resp.success) {
+    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject("", "", bucket, key, payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject('', '', bucket, key, payload.hash());
+  }
 }
 
 export function obj_read() {
-    if (__ENV.SLEEP_READ) {
-        sleep(__ENV.SLEEP_READ);
+  if (__ENV.SLEEP_READ) {
+    sleep(__ENV.SLEEP_READ);
+  }
+
+  if (obj_to_read_selector) {
+    const obj = obj_to_read_selector.nextObject();
+    if (!obj) {
+      return;
     }
-
-    if(obj_to_read_selector) {
-        const obj = obj_to_read_selector.nextObject();
-        if (!obj) {
-            return;
-        }
-        const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
-        if (!resp.success) {
-            log.withFields({bucket: obj.s3_bucket, key: obj.s3_key}).error(resp.error);
-        }
-        return
-    }
-
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-
-    const resp = s3_client.get(obj.bucket, obj.object);
+    const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
     if (!resp.success) {
-        log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
-    } 
+      log.withFields({bucket: obj.s3_bucket, key: obj.s3_key})
+          .error(resp.error);
+    }
+    return
+  }
+
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+
+  const resp = s3_client.get(obj.bucket, obj.object);
+  if (!resp.success) {
+    log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
+  }
 }
 
 export function obj_delete() {
-    if (__ENV.SLEEP_DELETE) {
-        sleep(__ENV.SLEEP_DELETE);
-    }
+  if (__ENV.SLEEP_DELETE) {
+    sleep(__ENV.SLEEP_DELETE);
+  }
 
-    const obj = obj_to_delete_selector.nextObject();
-    if (!obj) {
-        return;
-    }
+  const obj = obj_to_delete_selector.nextObject();
+  if (!obj) {
+    return;
+  }
 
-    const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
-    if (!resp.success) {
-        log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: "DELETE"}).error(resp.error);
-        return;
-    }
+  const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
+  if (!resp.success) {
+    log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: 'DELETE'})
+        .error(resp.error);
+    return;
+  }
 
-    obj_registry.deleteObject(obj.id);
+  obj_registry.deleteObject(obj.id);
 }
diff --git a/scenarios/s3_multipart.js b/scenarios/s3_multipart.js
index a3c1e28..2b94ddc 100644
--- a/scenarios/s3_multipart.js
+++ b/scenarios/s3_multipart.js
@@ -1,110 +1,119 @@
+import {sleep} from 'k6';
+import {SharedArray} from 'k6/data';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
-import stats from 'k6/x/frostfs/stats';
 import s3 from 'k6/x/frostfs/s3';
-import {SharedArray} from 'k6/data';
-import {sleep} from 'k6';
-import {textSummary} from './libs/k6-summary-0.0.2.js';
+import stats from 'k6/x/frostfs/stats';
+
+import {newGenerator} from './libs/datagen.js';
 import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
 import {uuidv4} from './libs/k6-utils-1.4.0.js';
-import { newGenerator } from './libs/datagen.js';
 
 parseEnv();
 
-const bucket_list = new SharedArray('bucket_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
+const bucket_list = new SharedArray('bucket_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
 });
 
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint = s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
-const no_verify_ssl = __ENV.NO_VERIFY_SSL || "true";
-const connection_args = {no_verify_ssl: no_verify_ssl}
+const s3_endpoint =
+    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
+const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
+const connection_args = {
+  no_verify_ssl: no_verify_ssl
+};
 const s3_client = s3.connect(s3_endpoint, connection_args);
-const log = logging.new().withField("endpoint", s3_endpoint);
+const log = logging.new().withField('endpoint', s3_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 const duration = __ENV.DURATION;
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const scenarios = {};
 
 const write_vu_count = parseInt(__ENV.WRITERS || '0');
 if (write_vu_count < 1) {
-    throw 'number of VUs (env WRITERS) performing write operations should be greater than 0';
+  throw 'number of VUs (env WRITERS) performing write operations should be greater than 0';
 }
 
 const write_multipart_vu_count = parseInt(__ENV.WRITERS_MULTIPART || '0');
 if (write_multipart_vu_count < 1) {
-    throw 'number of parts (env WRITERS_MULTIPART) to upload in parallel should be greater than 0';
+  throw 'number of parts (env WRITERS_MULTIPART) to upload in parallel should be greater than 0';
 }
 
-const generator = newGenerator(write_vu_count > 0 || write_multipart_vu_count > 0);
+const generator =
+    newGenerator(write_vu_count > 0 || write_multipart_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write_multipart = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write_multipart',
-        gracefulStop: '5s',
-    };
+  scenarios.write_multipart = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write_multipart',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count * write_multipart_vu_count;
+  const total_vu_count = write_vu_count * write_multipart_vu_count;
 
-    console.log(`Pregenerated buckets:          ${bucket_list.length}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Writing multipart VUs:         ${write_multipart_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
+  console.log(`Pregenerated buckets:          ${bucket_list.length}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Writing multipart VUs:         ${write_multipart_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
+  if (obj_registry) {
+    obj_registry.close();
+  }
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, {indent: ' ', enableColors: false}),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
-const write_multipart_part_size = 1024 * parseInt(__ENV.WRITE_OBJ_PART_SIZE || '0')
+const write_multipart_part_size =
+    1024 * parseInt(__ENV.WRITE_OBJ_PART_SIZE || '0')
 if (write_multipart_part_size < 5 * 1024 * 1024) {
-    throw 'part size (env WRITE_OBJ_PART_SIZE * 1024) must be greater than (5 MB)';
+  throw 'part size (env WRITE_OBJ_PART_SIZE * 1024) must be greater than (5 MB)';
 }
 
 export function obj_write_multipart() {
-    if (__ENV.SLEEP_WRITE) {
-        sleep(__ENV.SLEEP_WRITE);
-    }
+  if (__ENV.SLEEP_WRITE) {
+    sleep(__ENV.SLEEP_WRITE);
+  }
 
-    const key = __ENV.OBJ_NAME || uuidv4();
-    const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
+  const key = __ENV.OBJ_NAME || uuidv4();
+  const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = s3_client.multipart(bucket, key, write_multipart_part_size, write_multipart_vu_count, payload);
-    if (!resp.success) {
-        log.withFields({bucket: bucket, key: key}).error(resp.error);
-        return;
-    }
+  const payload = generator.genPayload();
+  const resp = s3_client.multipart(
+      bucket, key, write_multipart_part_size, write_multipart_vu_count,
+      payload);
+  if (!resp.success) {
+    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject("", "", bucket, key, payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject('', '', bucket, key, payload.hash());
+  }
 }
diff --git a/scenarios/s3local.js b/scenarios/s3local.js
index 34b7562..6eaf049 100644
--- a/scenarios/s3local.js
+++ b/scenarios/s3local.js
@@ -1,67 +1,70 @@
+import {SharedArray} from 'k6/data';
+import exec from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
-import stats from 'k6/x/frostfs/stats';
 import s3local from 'k6/x/frostfs/s3local';
-import { SharedArray } from 'k6/data';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
-import { uuidv4 } from './libs/k6-utils-1.4.0.js';
-import exec from 'k6/execution';
-import { newGenerator } from './libs/datagen.js';
+import stats from 'k6/x/frostfs/stats';
+
+import {newGenerator} from './libs/datagen.js';
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
+import {uuidv4} from './libs/k6-utils-1.4.0.js';
 
 parseEnv();
 
-const obj_list = new SharedArray('obj_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
+const obj_list = new SharedArray('obj_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).objects;
 });
 
-const container_list = new SharedArray('container_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
+const container_list = new SharedArray('container_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).containers;
 });
 
-const bucket_list = new SharedArray('bucket_list', function () {
-    return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
+const bucket_list = new SharedArray('bucket_list', function() {
+  return JSON.parse(open(__ENV.PREGEN_JSON)).buckets;
 });
 
 function bucket_mapping() {
-    if (container_list.length != bucket_list.length) {
-        throw 'The number of containers and buckets in the preset file must be the same.';
-    }
-    let mapping = {};
-    for (let i = 0; i < container_list.length; ++i) {
-        mapping[bucket_list[i]] = container_list[i];
-    }
-    return mapping;
+  if (container_list.length != bucket_list.length) {
+    throw 'The number of containers and buckets in the preset file must be the same.';
+  }
+  let mapping = {};
+  for (let i = 0; i < container_list.length; ++i) {
+    mapping[bucket_list[i]] = container_list[i];
+  }
+  return mapping;
 }
 
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 const config_file = __ENV.CONFIG_FILE;
 const config_dir = __ENV.CONFIG_DIR;
-const max_total_size_gb = __ENV.MAX_TOTAL_SIZE_GB ? parseInt(__ENV.MAX_TOTAL_SIZE_GB) : 0;
-const s3_client = s3local.connect(config_file, config_dir, {
-    'debug_logger': __ENV.DEBUG_LOGGER || 'false',
-}, bucket_mapping(), max_total_size_gb);
-const log = logging.new().withFields({"config_file": config_file,"config_dir": config_dir});
+const max_total_size_gb =
+    __ENV.MAX_TOTAL_SIZE_GB ? parseInt(__ENV.MAX_TOTAL_SIZE_GB) : 0;
+const s3_client = s3local.connect(
+    config_file, config_dir, {
+      'debug_logger': __ENV.DEBUG_LOGGER || 'false',
+    },
+    bucket_mapping(), max_total_size_gb);
+const log = logging.new().withFields(
+    {'config_file': config_file, 'config_dir': config_dir});
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
-const obj_registry = registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
+const obj_registry =
+    registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
 
 let obj_to_read_selector = undefined;
 if (registry_enabled) {
-    obj_to_read_selector = registry.getLoopedSelector(
-        __ENV.REGISTRY_FILE,
-        "obj_to_read",
-        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-        {
-            status: "created",
-        }
-    )
+  obj_to_read_selector = registry.getLoopedSelector(
+      __ENV.REGISTRY_FILE, 'obj_to_read',
+      __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+        status: 'created',
+      })
 }
 
 const duration = __ENV.DURATION;
@@ -71,96 +74,99 @@ const scenarios = {};
 const write_vu_count = parseInt(__ENV.WRITERS || '0');
 const generator = newGenerator(write_vu_count > 0);
 if (write_vu_count > 0) {
-    scenarios.write = {
-        executor: 'constant-vus',
-        vus: write_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_write', 
-        gracefulStop: '5s',
-    };
+  scenarios.write = {
+    executor: 'constant-vus',
+    vus: write_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_write',
+    gracefulStop: '5s',
+  };
 }
 
 const read_vu_count = parseInt(__ENV.READERS || '0');
 if (read_vu_count > 0) {
-    scenarios.read = {
-        executor: 'constant-vus',
-        vus: read_vu_count,
-        duration: `${duration}s`,
-        exec: 'obj_read', 
-        gracefulStop: '5s',
-    };
+  scenarios.read = {
+    executor: 'constant-vus',
+    vus: read_vu_count,
+    duration: `${duration}s`,
+    exec: 'obj_read',
+    gracefulStop: '5s',
+  };
 }
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    const total_vu_count = write_vu_count + read_vu_count;
+  const total_vu_count = write_vu_count + read_vu_count;
 
-    console.log(`Pregenerated buckets:          ${bucket_list.length}`);
-    console.log(`Pregenerated read object size: ${read_size}`);
-    console.log(`Pregenerated total objects:    ${obj_list.length}`);
-    console.log(`Reading VUs:                   ${read_vu_count}`);
-    console.log(`Writing VUs:                   ${write_vu_count}`);
-    console.log(`Total VUs:                     ${total_vu_count}`);
+  console.log(`Pregenerated buckets:          ${bucket_list.length}`);
+  console.log(`Pregenerated read object size: ${read_size}`);
+  console.log(`Pregenerated total objects:    ${obj_list.length}`);
+  console.log(`Reading VUs:                   ${read_vu_count}`);
+  console.log(`Writing VUs:                   ${write_vu_count}`);
+  console.log(`Total VUs:                     ${total_vu_count}`);
 
-    const start_timestamp = Date.now()
-    console.log(`Load started at:               ${Date(start_timestamp).toString()}`)
+  const start_timestamp = Date.now()
+  console.log(
+      `Load started at:               ${Date(start_timestamp).toString()}`)
 }
 
 export function teardown(data) {
-    if (obj_registry) {
-        obj_registry.close();
-    }
-    const end_timestamp = Date.now()
-    console.log(`Load finished at:              ${Date(end_timestamp).toString()}`)
+  if (obj_registry) {
+    obj_registry.close();
+  }
+  const end_timestamp = Date.now()
+  console.log(
+      `Load finished at:              ${Date(end_timestamp).toString()}`)
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
-  }
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
+}
 
 export function obj_write() {
-    const key = __ENV.OBJ_NAME || uuidv4();
-    const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
+  const key = __ENV.OBJ_NAME || uuidv4();
+  const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
-    const payload = generator.genPayload();
-    const resp = s3_client.put(bucket, key, payload);
-    if (!resp.success) {
-        if (resp.abort) {
-            exec.test.abort(resp.error);
-        }
-        log.withFields({bucket: bucket, key: key}).error(resp.error);
-        return;
+  const payload = generator.genPayload();
+  const resp = s3_client.put(bucket, key, payload);
+  if (!resp.success) {
+    if (resp.abort) {
+      exec.test.abort(resp.error);
     }
+    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    return;
+  }
 
-    if (obj_registry) {
-        obj_registry.addObject("", "", bucket, key, payload.hash());
-    }
+  if (obj_registry) {
+    obj_registry.addObject('', '', bucket, key, payload.hash());
+  }
 }
 
 export function obj_read() {
-    if(obj_to_read_selector) {
-        const obj = obj_to_read_selector.nextObject();
-        if (!obj) {
-            return;
-        }
-        const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
-        if (!resp.success) {
-            log.withFields({bucket: obj.s3_bucket, key: obj.s3_key}).error(resp.error);
-        }
-        return
+  if (obj_to_read_selector) {
+    const obj = obj_to_read_selector.nextObject();
+    if (!obj) {
+      return;
     }
-
-    const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
-
-    const resp = s3_client.get(obj.bucket, obj.object);
+    const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
     if (!resp.success) {
-        log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
-    } 
+      log.withFields({bucket: obj.s3_bucket, key: obj.s3_key})
+          .error(resp.error);
+    }
+    return
+  }
+
+  const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
+
+  const resp = s3_client.get(obj.bucket, obj.object);
+  if (!resp.success) {
+    log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
+  }
 }
diff --git a/scenarios/verify.js b/scenarios/verify.js
index 44318c6..e2f0d79 100644
--- a/scenarios/verify.js
+++ b/scenarios/verify.js
@@ -1,20 +1,21 @@
+import {sleep} from 'k6';
+import {Counter} from 'k6/metrics';
+import logging from 'k6/x/frostfs/logging';
 import native from 'k6/x/frostfs/native';
 import registry from 'k6/x/frostfs/registry';
-import stats from 'k6/x/frostfs/stats';
 import s3 from 'k6/x/frostfs/s3';
-import logging from 'k6/x/frostfs/logging';
-import { sleep } from 'k6';
-import { Counter } from 'k6/metrics';
-import { textSummary } from './libs/k6-summary-0.0.2.js';
-import { parseEnv } from './libs/env-parser.js';
+import stats from 'k6/x/frostfs/stats';
+
+import {parseEnv} from './libs/env-parser.js';
+import {textSummary} from './libs/k6-summary-0.0.2.js';
 
 parseEnv();
 
 const obj_registry = registry.open(__ENV.REGISTRY_FILE);
 
 // Time limit (in seconds) for the run
-const time_limit = __ENV.TIME_LIMIT || "60";
-const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
+const time_limit = __ENV.TIME_LIMIT || '60';
+const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
 // Number of objects in each status. These counters are cumulative in a
 // sense that they reflect total number of objects in the registry, not just
@@ -22,144 +23,148 @@ const summary_json = __ENV.SUMMARY_JSON || "/tmp/summary.json";
 // This allows to run this scenario multiple times and collect overall
 // statistics in the final run.
 const obj_counters = {
-    verified: new Counter('verified_obj'),
-    skipped: new Counter('skipped_obj'),
-    invalid: new Counter('invalid_obj'),
+  verified: new Counter('verified_obj'),
+  skipped: new Counter('skipped_obj'),
+  invalid: new Counter('invalid_obj'),
 };
 
 let log = logging.new();
 
 if (!!__ENV.METRIC_TAGS) {
-    stats.setTags(__ENV.METRIC_TAGS)
+  stats.setTags(__ENV.METRIC_TAGS)
 }
 
 // Connect to random gRPC endpoint
 let grpc_client = undefined;
 if (__ENV.GRPC_ENDPOINTS) {
-    const grpcEndpoints = __ENV.GRPC_ENDPOINTS.split(',');
-    const grpcEndpoint = grpcEndpoints[Math.floor(Math.random() * grpcEndpoints.length)];
-    log = log.withField("endpoint", grpcEndpoint);
-    grpc_client = native.connect(grpcEndpoint, '',
-        __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 0,
-        __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 0,
-        __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === "true" : false, '');
+  const grpcEndpoints = __ENV.GRPC_ENDPOINTS.split(',');
+  const grpcEndpoint =
+      grpcEndpoints[Math.floor(Math.random() * grpcEndpoints.length)];
+  log = log.withField('endpoint', grpcEndpoint);
+  grpc_client = native.connect(
+      grpcEndpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 0,
+      __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 0,
+      __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' :
+                              false,
+      '');
 }
 
 // Connect to random S3 endpoint
 let s3_client = undefined;
 if (__ENV.S3_ENDPOINTS) {
-    const no_verify_ssl = __ENV.NO_VERIFY_SSL || "true";
-    const connection_args = {no_verify_ssl: no_verify_ssl}
-    const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-    const s3_endpoint = s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
-    log = log.withField("endpoint", s3_endpoint);
-    s3_client = s3.connect(s3_endpoint, connection_args);
+  const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
+  const connection_args = {no_verify_ssl: no_verify_ssl};
+  const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
+  const s3_endpoint =
+      s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
+  log = log.withField('endpoint', s3_endpoint);
+  s3_client = s3.connect(s3_endpoint, connection_args);
 }
 
-// We will attempt to verify every object in "created" status. The scenario will execute
-// as many iterations as there are objects. Each object will have 3 retries to be verified
+// We will attempt to verify every object in "created" status. The scenario will
+// execute as many iterations as there are objects. Each object will have 3
+// retries to be verified
 const obj_to_verify_selector = registry.getSelector(
-    __ENV.REGISTRY_FILE,
-    "obj_to_verify",
-    __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-    {
-        status: "created",
-    }
-);
+    __ENV.REGISTRY_FILE, 'obj_to_verify',
+    __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {
+      status: 'created',
+    });
 const obj_to_verify_count = obj_to_verify_selector.count();
-// Execute at least one iteration (executor shared-iterations can't run 0 iterations)
+// Execute at least one iteration (executor shared-iterations can't run 0
+// iterations)
 const iterations = Math.max(1, obj_to_verify_count);
-// Executor shared-iterations requires number of iterations to be larger than number of VUs
+// Executor shared-iterations requires number of iterations to be larger than
+// number of VUs
 const vus = Math.min(__ENV.CLIENTS, iterations);
 
 const scenarios = {
-    verify: {
-        executor: 'shared-iterations',
-        vus,
-        iterations,
-        maxDuration: `${time_limit}s`,
-        exec: 'obj_verify',
-        gracefulStop: '5s',
-    }
+  verify: {
+    executor: 'shared-iterations',
+    vus,
+    iterations,
+    maxDuration: `${time_limit}s`,
+    exec: 'obj_verify',
+    gracefulStop: '5s',
+  }
 };
 
 export const options = {
-    scenarios,
-    setupTimeout: '5s',
+  scenarios,
+  setupTimeout: '5s',
 };
 
 export function setup() {
-    // Populate counters with initial values
-    for (const [status, counter] of Object.entries(obj_counters)) {
-        const obj_selector = registry.getSelector(
-            __ENV.REGISTRY_FILE,
-            status,
-            __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0,
-            { status });
-        counter.add(obj_selector.count());
-    }
+  // Populate counters with initial values
+  for (const [status, counter] of Object.entries(obj_counters)) {
+    const obj_selector = registry.getSelector(
+        __ENV.REGISTRY_FILE, status,
+        __ENV.SELECTION_SIZE ? parseInt(__ENV.SELECTION_SIZE) : 0, {status});
+    counter.add(obj_selector.count());
+  }
 }
 
 export function handleSummary(data) {
-    return {
-        'stdout': textSummary(data, { indent: ' ', enableColors: false }),
-        [summary_json]: JSON.stringify(data),
-    };
+  return {
+    'stdout': textSummary(data, {indent: ' ', enableColors: false}),
+    [summary_json]: JSON.stringify(data),
+  };
 }
 
 export function obj_verify() {
-    if (obj_to_verify_count == 0) {
-        log.info("Nothing to verify");
-        return;
-    }
+  if (obj_to_verify_count == 0) {
+    log.info('Nothing to verify');
+    return;
+  }
 
-    if (__ENV.SLEEP) {
-        sleep(__ENV.SLEEP);
-    }
+  if (__ENV.SLEEP) {
+    sleep(__ENV.SLEEP);
+  }
 
-    const obj = obj_to_verify_selector.nextObject();
-    if (!obj) {
-        log.info("All objects have been verified");
-        return;
-    }
+  const obj = obj_to_verify_selector.nextObject();
+  if (!obj) {
+    log.info('All objects have been verified');
+    return;
+  }
 
-    const obj_status = verify_object_with_retries(obj, 3);
-    obj_counters[obj_status].add(1);
-    obj_registry.setObjectStatus(obj.id, obj.status, obj_status);
+  const obj_status = verify_object_with_retries(obj, 3);
+  obj_counters[obj_status].add(1);
+  obj_registry.setObjectStatus(obj.id, obj.status, obj_status);
 }
 
 function verify_object_with_retries(obj, attempts) {
-    for (let i = 0; i < attempts; i++) {
-        let result;
-        // Different name is required.
-        // ReferenceError: Cannot access a variable before initialization.
-        let lg = log;
-        if (obj.c_id && obj.o_id) {
-            lg = lg.withFields({cid: obj.c_id, oid: obj.o_id});
-            result = grpc_client.verifyHash(obj.c_id, obj.o_id, obj.payload_hash);
-        } else if (obj.s3_bucket && obj.s3_key) {
-            lg = lg.withFields({bucket: obj.s3_bucket, key: obj.s3_key});
-            result = s3_client.verifyHash(obj.s3_bucket, obj.s3_key, obj.payload_hash);
-        } else {
-            lg.withFields({
-                cid: obj.c_id,
-                oid: obj.o_id,
-                bucket: obj.s3_bucket,
-                key: obj.s3_key
-            }).warn(`Object cannot be verified with supported protocols`);
-            return "skipped";
-        }
-
-        if (result.success) {
-            return "verified";
-        } else if (result.error == "hash mismatch") {
-            return "invalid";
-        }
-
-        // Unless we explicitly saw that there was a hash mismatch, then we will retry after a delay
-        lg.error(`Verify error: ${result.error}. Object will be re-tried`);
-        sleep(__ENV.SLEEP);
+  for (let i = 0; i < attempts; i++) {
+    let result;
+    // Different name is required.
+    // ReferenceError: Cannot access a variable before initialization.
+    let lg = log;
+    if (obj.c_id && obj.o_id) {
+      lg = lg.withFields({cid: obj.c_id, oid: obj.o_id});
+      result = grpc_client.verifyHash(obj.c_id, obj.o_id, obj.payload_hash);
+    } else if (obj.s3_bucket && obj.s3_key) {
+      lg = lg.withFields({bucket: obj.s3_bucket, key: obj.s3_key});
+      result =
+          s3_client.verifyHash(obj.s3_bucket, obj.s3_key, obj.payload_hash);
+    } else {
+      lg.withFields({
+          cid: obj.c_id,
+          oid: obj.o_id,
+          bucket: obj.s3_bucket,
+          key: obj.s3_key
+        }).warn(`Object cannot be verified with supported protocols`);
+      return 'skipped';
     }
 
-    return "invalid";
+    if (result.success) {
+      return 'verified';
+    } else if (result.error == 'hash mismatch') {
+      return 'invalid';
+    }
+
+    // Unless we explicitly saw that there was a hash mismatch, then we will
+    // retry after a delay
+    lg.error(`Verify error: ${result.error}. Object will be re-tried`);
+    sleep(__ENV.SLEEP);
+  }
+
+  return 'invalid';
 }