diff --git a/CHANGELOG.md b/CHANGELOG.md
index 72b30b38d50..6cf5619712d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,10 +8,34 @@ Inited :)
 
 * `Versions`:
     * `kotlinx.serialization`: `1.0.0-RC2` -> `1.0.0`
+* `Pagination`
+    * `Common`
+        * Function `calculatePage` for calculating page based on size of page and index of first element
+        * Extension `List#createPaginationResult` which use index of first element to calculate current page and other
+        info in `PaginationResult` object
+        * Factory `emptyPaginationResult` for empty `PaginationResult`
+        * Extensions `paginate` for creating of `PaginationResult` which use as source one of next types:
+            * `Iterable`
+            * `List`
+            * `Set`
 * `Repos`
     * `Common`
+        * Interfaces related to `OneToManyKeyValueRepo` were renamed with convenience to `Read`/`Write` modifier before name
+            * All subclasses were renamed
+        * Interfaces related to `StandartKeyValueRepo` were renamed with convenience to `Read`/`Write` modifier before name
+            * All subclasses were renamed
         * Extensions `doForAll` and `getAll` were added for all current types of repos:
             * `ReadStandardCRUDRepo`
-            * `StandardReadKeyValueRepo`
-            * `OneToManyReadKeyValueRepo`
-        * `StandardReadKeyValueRepo` methods `values` and `keys` now have default value for `reversed` parameter `false`
+            * `ReadStandardKeyValueRepo`
+            * `ReadOneToManyKeyValueRepo`
+        * `ReadStandardKeyValueRepo` methods `values` and `keys` now have default value for `reversed` parameter `false`
+        * New `Flow`'s in `WriteOneToManyKeyValueRepo`:
+            * `onNewValue`
+            * `onValueRemoved`
+            * `onDataCleared`
+        * New function `ReadStandardCRUDRepo#count`
+    * `In Memory`
+        * Package has been created:) you can connect it via `implementation "dev.inmo:micro_utils.repos.inmemory"`
+        * `MapCRUDRepo` class as implementation of `StandardCRUDRepo` on top of `MutableMap` has been added
+        * `MapKeyValueRepo` class as implementation of `StandardKeyValueRepo` on top of `MutableMap` has been added
+        * `MapOneToManyKeyValueRepo` class as implementation of `OneToManyKeyValueRepo` on top of `MutableMap` has been added
diff --git a/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/Pagination.kt b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/Pagination.kt
index a3fd510198c..53d8958dc42 100644
--- a/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/Pagination.kt
+++ b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/Pagination.kt
@@ -1,6 +1,7 @@
 package dev.inmo.micro_utils.pagination
 
 import kotlin.math.ceil
+import kotlin.math.floor
 
 /**
  * Base interface of pagination
@@ -50,3 +51,12 @@ fun calculatePagesNumber(datasetSize: Int, pageSize: Int): Int =
         datasetSize.toLong(),
         pageSize
     )
+
+/**
+ * @return calculated page number which can be correctly used in [PaginationResult] as [PaginationResult.page] value
+ */
+fun calculatePage(firstIndex: Int, resultsSize: Int): Int = if (resultsSize > 0) {
+    floor(firstIndex.toFloat() / resultsSize).toInt()
+} else {
+    0
+}
diff --git a/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/PaginationResult.kt b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/PaginationResult.kt
index ebca7b51ef8..35c3f3939a8 100644
--- a/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/PaginationResult.kt
+++ b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/PaginationResult.kt
@@ -10,6 +10,8 @@ data class PaginationResult<T>(
     override val size: Int
 ) : Pagination
 
+fun <T> emptyPaginationResult() = PaginationResult<T>(0, 0, emptyList(), 0)
+
 fun <T> List<T>.createPaginationResult(
     pagination: Pagination,
     commonObjectsNumber: Long
@@ -23,6 +25,19 @@ fun <T> List<T>.createPaginationResult(
     pagination.size
 )
 
+fun <T> List<T>.createPaginationResult(
+    firstIndex: Int,
+    commonObjectsNumber: Long
+) = PaginationResult(
+    calculatePage(firstIndex, size),
+    calculatePagesNumber(
+        commonObjectsNumber,
+        size
+    ),
+    this,
+    size
+)
+
 fun <T> Pair<Long, List<T>>.createPaginationResult(
     pagination: Pagination
 ) = second.createPaginationResult(pagination, first)
diff --git a/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/utils/IterableExtensions.kt b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/utils/IterableExtensions.kt
new file mode 100644
index 00000000000..4b6a5d97240
--- /dev/null
+++ b/pagination/common/src/commonMain/kotlin/dev/inmo/micro_utils/pagination/utils/IterableExtensions.kt
@@ -0,0 +1,35 @@
+package dev.inmo.micro_utils.pagination.utils
+
+import dev.inmo.micro_utils.pagination.*
+
+fun <T> Iterable<T>.paginate(with: Pagination): PaginationResult<T> {
+    var i = 0
+    val result = mutableListOf<T>()
+    val lowerIndex = with.firstIndex
+    val greatestIndex = with.lastIndex
+    for (item in this) {
+        when {
+            i < lowerIndex || i > greatestIndex -> i++
+            else -> {
+                result.add(item)
+                i++
+            }
+        }
+    }
+
+    return result.createPaginationResult(with, i.toLong())
+}
+
+fun <T> List<T>.paginate(with: Pagination): PaginationResult<T> {
+    return subList(with.firstIndex, with.lastIndex + 1).createPaginationResult(
+        with,
+        size.toLong()
+    )
+}
+
+fun <T> Set<T>.paginate(with: Pagination): PaginationResult<T> {
+    return this.drop(with.firstIndex).take(with.size).createPaginationResult(
+        with,
+        size.toLong()
+    )
+}
diff --git a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/OneToManyKeyValueRepo.kt b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/OneToManyKeyValueRepo.kt
index 8cd84aa7bb8..4c6b71e6b9b 100644
--- a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/OneToManyKeyValueRepo.kt
+++ b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/OneToManyKeyValueRepo.kt
@@ -2,8 +2,9 @@ package dev.inmo.micro_utils.repos
 
 import dev.inmo.micro_utils.pagination.Pagination
 import dev.inmo.micro_utils.pagination.PaginationResult
+import kotlinx.coroutines.flow.Flow
 
-interface OneToManyReadKeyValueRepo<Key, Value> : Repo {
+interface ReadOneToManyKeyValueRepo<Key, Value> : Repo {
     suspend fun get(k: Key, pagination: Pagination, reversed: Boolean = false): PaginationResult<Value>
     suspend fun keys(pagination: Pagination, reversed: Boolean = false): PaginationResult<Key>
     suspend fun contains(k: Key): Boolean
@@ -11,11 +12,19 @@ interface OneToManyReadKeyValueRepo<Key, Value> : Repo {
     suspend fun count(k: Key): Long
     suspend fun count(): Long
 }
+@Deprecated("Renamed", ReplaceWith("ReadOneToManyKeyValueRepo", "dev.inmo.micro_utils.repos.ReadOneToManyKeyValueRepo"))
+typealias OneToManyReadKeyValueRepo<Key, Value> = ReadOneToManyKeyValueRepo<Key, Value>
+
+interface WriteOneToManyKeyValueRepo<Key, Value> : Repo {
+    val onNewValue: Flow<Pair<Key, Value>>
+    val onValueRemoved: Flow<Pair<Key, Value>>
+    val onDataCleared: Flow<Key>
 
-interface OneToManyWriteKeyValueRepo<Key, Value> : Repo {
     suspend fun add(k: Key, v: Value)
     suspend fun remove(k: Key, v: Value)
     suspend fun clear(k: Key)
 }
+@Deprecated("Renamed", ReplaceWith("WriteOneToManyKeyValueRepo", "dev.inmo.micro_utils.repos.WriteOneToManyKeyValueRepo"))
+typealias OneToManyWriteKeyValueRepo<Key, Value> = WriteOneToManyKeyValueRepo<Key, Value>
 
-interface OneToManyKeyValueRepo<Key, Value> : OneToManyReadKeyValueRepo<Key, Value>, OneToManyWriteKeyValueRepo<Key, Value>
\ No newline at end of file
+interface OneToManyKeyValueRepo<Key, Value> : ReadOneToManyKeyValueRepo<Key, Value>, WriteOneToManyKeyValueRepo<Key, Value>
\ No newline at end of file
diff --git a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartCRUDRepo.kt b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartCRUDRepo.kt
index c8c193c5f29..28ad1ac34c7 100644
--- a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartCRUDRepo.kt
+++ b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartCRUDRepo.kt
@@ -8,6 +8,7 @@ interface ReadStandardCRUDRepo<ObjectType, IdType> : Repo {
     suspend fun getByPagination(pagination: Pagination): PaginationResult<ObjectType>
     suspend fun getById(id: IdType): ObjectType?
     suspend fun contains(id: IdType): Boolean
+    suspend fun count(): Long
 }
 
 typealias UpdatedValuePair<IdType, ValueType> = Pair<IdType, ValueType>
diff --git a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartKeyValueRepo.kt b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartKeyValueRepo.kt
index 6cc2c6a03f7..a2666571db6 100644
--- a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartKeyValueRepo.kt
+++ b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/StandartKeyValueRepo.kt
@@ -4,7 +4,7 @@ import dev.inmo.micro_utils.pagination.Pagination
 import dev.inmo.micro_utils.pagination.PaginationResult
 import kotlinx.coroutines.flow.Flow
 
-interface StandardReadKeyValueRepo<Key, Value> : Repo {
+interface ReadStandardKeyValueRepo<Key, Value> : Repo {
     suspend fun get(k: Key): Value?
     suspend fun values(pagination: Pagination, reversed: Boolean = false): PaginationResult<Value>
     suspend fun keys(pagination: Pagination, reversed: Boolean = false): PaginationResult<Key>
@@ -12,7 +12,7 @@ interface StandardReadKeyValueRepo<Key, Value> : Repo {
     suspend fun count(): Long
 }
 
-interface StandardWriteKeyValueRepo<Key, Value> : Repo {
+interface WriteStandardKeyValueRepo<Key, Value> : Repo {
     val onNewValue: Flow<Pair<Key, Value>>
     val onValueRemoved: Flow<Key>
 
@@ -20,4 +20,4 @@ interface StandardWriteKeyValueRepo<Key, Value> : Repo {
     suspend fun unset(k: Key)
 }
 
-interface StandardKeyValueRepo<Key, Value> : StandardReadKeyValueRepo<Key, Value>, StandardWriteKeyValueRepo<Key, Value>
\ No newline at end of file
+interface StandardKeyValueRepo<Key, Value> : ReadStandardKeyValueRepo<Key, Value>, WriteStandardKeyValueRepo<Key, Value>
\ No newline at end of file
diff --git a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/KeyValuePaginationExtensions.kt b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/KeyValuePaginationExtensions.kt
index 8bd84afdce0..4442571948c 100644
--- a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/KeyValuePaginationExtensions.kt
+++ b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/KeyValuePaginationExtensions.kt
@@ -3,7 +3,7 @@ package dev.inmo.micro_utils.repos.pagination
 import dev.inmo.micro_utils.pagination.*
 import dev.inmo.micro_utils.repos.*
 
-suspend inline fun <Key, Value, REPO : StandardReadKeyValueRepo<Key, Value>> REPO.doForAll(
+suspend inline fun <Key, Value, REPO : ReadStandardKeyValueRepo<Key, Value>> REPO.doForAll(
     @Suppress("REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE")
     methodCaller: suspend REPO.(Pagination) -> PaginationResult<Key>,
     block: (List<Pair<Key, Value>>) -> Unit
@@ -15,11 +15,11 @@ suspend inline fun <Key, Value, REPO : StandardReadKeyValueRepo<Key, Value>> REP
     }
 }
 
-suspend inline fun <Key, Value, REPO : StandardReadKeyValueRepo<Key, Value>> REPO.doForAll(
+suspend inline fun <Key, Value, REPO : ReadStandardKeyValueRepo<Key, Value>> REPO.doForAll(
     block: (List<Pair<Key, Value>>) -> Unit
 ) = doForAll({ keys(it, false) }, block)
 
-suspend inline fun <Key, Value, REPO : StandardReadKeyValueRepo<Key, Value>> REPO.getAll(
+suspend inline fun <Key, Value, REPO : ReadStandardKeyValueRepo<Key, Value>> REPO.getAll(
     @Suppress("REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE")
     methodCaller: suspend REPO.(Pagination) -> PaginationResult<Key>
 ): List<Pair<Key, Value>> {
diff --git a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/OneToManyPaginationExtensions.kt b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/OneToManyPaginationExtensions.kt
index 313721d170b..0c3de2def3c 100644
--- a/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/OneToManyPaginationExtensions.kt
+++ b/repos/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/pagination/OneToManyPaginationExtensions.kt
@@ -3,7 +3,7 @@ package dev.inmo.micro_utils.repos.pagination
 import dev.inmo.micro_utils.pagination.*
 import dev.inmo.micro_utils.repos.*
 
-suspend inline fun <Key, Value, REPO : OneToManyReadKeyValueRepo<Key, Value>> REPO.doForAll(
+suspend inline fun <Key, Value, REPO : ReadOneToManyKeyValueRepo<Key, Value>> REPO.doForAll(
     @Suppress("REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE")
     methodCaller: suspend REPO.(Pagination) -> PaginationResult<Key>,
     block: (List<Pair<Key, List<Value>>>) -> Unit
@@ -25,11 +25,11 @@ suspend inline fun <Key, Value, REPO : OneToManyReadKeyValueRepo<Key, Value>> RE
     }
 }
 
-suspend inline fun <Key, Value, REPO : OneToManyReadKeyValueRepo<Key, Value>> REPO.doForAll(
+suspend inline fun <Key, Value, REPO : ReadOneToManyKeyValueRepo<Key, Value>> REPO.doForAll(
     block: (List<Pair<Key, List<Value>>>) -> Unit
 ) = doForAll({ keys(it, false) }, block)
 
-suspend inline fun <Key, Value, REPO : OneToManyReadKeyValueRepo<Key, Value>> REPO.getAll(
+suspend inline fun <Key, Value, REPO : ReadOneToManyKeyValueRepo<Key, Value>> REPO.getAll(
     @Suppress("REDUNDANT_INLINE_SUSPEND_FUNCTION_TYPE")
     methodCaller: suspend REPO.(Pagination) -> PaginationResult<Key>
 ): List<Pair<Key, List<Value>>> {
diff --git a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/AbstractExposedReadCRUDRepo.kt b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/AbstractExposedReadCRUDRepo.kt
index af9e7c268e4..916e0a80512 100644
--- a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/AbstractExposedReadCRUDRepo.kt
+++ b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/AbstractExposedReadCRUDRepo.kt
@@ -33,4 +33,6 @@ abstract class AbstractExposedReadCRUDRepo<ObjectType, IdType>(
     override suspend fun contains(id: IdType): Boolean = transaction(db = database) {
         select { selectById(id) }.limit(1).any()
     }
+
+    override suspend fun count(): Long = transaction(db = database) { selectAll().count() }
 }
diff --git a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/keyvalue/AbstractExposedReadKeyValueRepo.kt b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/keyvalue/AbstractExposedReadKeyValueRepo.kt
index 83ca592d8ee..867f7439cd8 100644
--- a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/keyvalue/AbstractExposedReadKeyValueRepo.kt
+++ b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/keyvalue/AbstractExposedReadKeyValueRepo.kt
@@ -1,7 +1,7 @@
 package dev.inmo.micro_utils.repos.exposed.keyvalue
 
 import dev.inmo.micro_utils.pagination.*
-import dev.inmo.micro_utils.repos.StandardReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadStandardKeyValueRepo
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.transactions.transaction
 
@@ -9,7 +9,7 @@ abstract class AbstractExposedReadKeyValueRepo<Key, Value>(
     protected val database: Database,
     protected val keyColumn: Column<Key>,
     protected val valueColumn: Column<Value>
-) : StandardReadKeyValueRepo<Key, Value>, Table() {
+) : ReadStandardKeyValueRepo<Key, Value>, Table() {
     override val primaryKey: PrimaryKey = PrimaryKey(keyColumn, valueColumn)
 
     override suspend fun get(k: Key): Value? = transaction(database) {
diff --git a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedKeyValueRepo.kt b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedOneToManyKeyValueRepo.kt
similarity index 66%
rename from repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedKeyValueRepo.kt
rename to repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedOneToManyKeyValueRepo.kt
index 8553c12e611..f0f5e45aa1e 100644
--- a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedKeyValueRepo.kt
+++ b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedOneToManyKeyValueRepo.kt
@@ -4,11 +4,11 @@ import dev.inmo.micro_utils.repos.OneToManyKeyValueRepo
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.transactions.transaction
 
-abstract class AbstractOneToManyExposedKeyValueRepo<Key, Value>(
+abstract class AbstractExposedOneToManyKeyValueRepo<Key, Value>(
     keyColumnAllocator: ColumnAllocator<Key>,
     valueColumnAllocator: ColumnAllocator<Value>,
     database: Database
-) : OneToManyKeyValueRepo<Key, Value>, AbstractOneToManyExposedReadKeyValueRepo<Key, Value>(
+) : OneToManyKeyValueRepo<Key, Value>, AbstractExposedReadOneToManyKeyValueRepo<Key, Value>(
     keyColumnAllocator,
     valueColumnAllocator,
     database
@@ -30,3 +30,6 @@ abstract class AbstractOneToManyExposedKeyValueRepo<Key, Value>(
         transaction(database) { deleteWhere { keyColumn.eq(k) } }
     }
 }
+
+@Deprecated("Renamed", ReplaceWith("AbstractExposedOneToManyKeyValueRepo", "dev.inmo.micro_utils.repos.exposed.onetomany.AbstractExposedOneToManyKeyValueRepo"))
+typealias AbstractOneToManyExposedKeyValueRepo<Key, Value> = AbstractExposedOneToManyKeyValueRepo<Key, Value>
diff --git a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedReadKeyValueRepo.kt b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedReadOneToManyKeyValueRepo.kt
similarity index 77%
rename from repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedReadKeyValueRepo.kt
rename to repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedReadOneToManyKeyValueRepo.kt
index 72ccc7ae84f..445ad25a04f 100644
--- a/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractOneToManyExposedReadKeyValueRepo.kt
+++ b/repos/exposed/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/exposed/onetomany/AbstractExposedReadOneToManyKeyValueRepo.kt
@@ -1,17 +1,17 @@
 package dev.inmo.micro_utils.repos.exposed.onetomany
 
 import dev.inmo.micro_utils.pagination.*
-import dev.inmo.micro_utils.repos.OneToManyReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadOneToManyKeyValueRepo
 import org.jetbrains.exposed.sql.*
 import org.jetbrains.exposed.sql.transactions.transaction
 
 typealias ColumnAllocator<T> = Table.() -> Column<T>
 
-abstract class AbstractOneToManyExposedReadKeyValueRepo<Key, Value>(
+abstract class AbstractExposedReadOneToManyKeyValueRepo<Key, Value>(
     keyColumnAllocator: ColumnAllocator<Key>,
     valueColumnAllocator: ColumnAllocator<Value>,
     protected val database: Database
-) : OneToManyReadKeyValueRepo<Key, Value>, Table() {
+) : ReadOneToManyKeyValueRepo<Key, Value>, Table() {
     protected val keyColumn: Column<Key> = keyColumnAllocator()
     protected val valueColumn: Column<Value> = valueColumnAllocator()
 
@@ -45,3 +45,6 @@ abstract class AbstractOneToManyExposedReadKeyValueRepo<Key, Value>(
         select { keyColumn.eq(k).and(valueColumn.eq(v)) }.limit(1).any()
     }
 }
+
+@Deprecated("Renamed", ReplaceWith("AbstractExposedReadOneToManyKeyValueRepo", "dev.inmo.micro_utils.repos.exposed.onetomany.AbstractExposedReadOneToManyKeyValueRepo"))
+typealias AbstractOneToManyExposedReadKeyValueRepo<Key, Value> = AbstractExposedReadOneToManyKeyValueRepo<Key, Value>
diff --git a/repos/inmemory/build.gradle b/repos/inmemory/build.gradle
new file mode 100644
index 00000000000..162e4af700e
--- /dev/null
+++ b/repos/inmemory/build.gradle
@@ -0,0 +1,17 @@
+plugins {
+    id "org.jetbrains.kotlin.multiplatform"
+    id "org.jetbrains.kotlin.plugin.serialization"
+}
+
+apply from: "$mppProjectWithSerializationPresetPath"
+
+kotlin {
+    sourceSets {
+        commonMain {
+            dependencies {
+                api internalProject("micro_utils.repos.common")
+                api internalProject("micro_utils.coroutines")
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapCRUDRepo.kt b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapCRUDRepo.kt
new file mode 100644
index 00000000000..a2194f0b96a
--- /dev/null
+++ b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapCRUDRepo.kt
@@ -0,0 +1,96 @@
+package dev.inmo.micro_utils.repos
+
+import dev.inmo.micro_utils.coroutines.BroadcastFlow
+import dev.inmo.micro_utils.pagination.*
+import kotlinx.coroutines.flow.Flow
+
+class ReadMapCRUDRepo<ObjectType, IdType>(
+    private val map: Map<IdType, ObjectType> = emptyMap()
+) : ReadStandardCRUDRepo<ObjectType, IdType> {
+    override suspend fun getByPagination(pagination: Pagination): PaginationResult<ObjectType> {
+        return map.keys.drop(pagination.firstIndex).take(pagination.size).mapNotNull {
+            map[it]
+        }.createPaginationResult(
+            pagination,
+            count()
+        )
+    }
+
+    override suspend fun getById(id: IdType): ObjectType? = map[id]
+
+    override suspend fun contains(id: IdType): Boolean = map.containsKey(id)
+
+    override suspend fun count(): Long = map.size.toLong()
+}
+
+abstract class WriteMapCRUDRepo<ObjectType, IdType, InputValueType>(
+    private val map: MutableMap<IdType, ObjectType> = mutableMapOf()
+) : WriteStandardCRUDRepo<ObjectType, IdType, InputValueType> {
+    private val _newObjectsFlow: BroadcastFlow<ObjectType> = BroadcastFlow()
+    override val newObjectsFlow: Flow<ObjectType>
+        get() = _newObjectsFlow
+    private val _updatedObjectsFlow: BroadcastFlow<ObjectType> = BroadcastFlow()
+    override val updatedObjectsFlow: Flow<ObjectType>
+        get() = _updatedObjectsFlow
+    private val _deletedObjectsIdsFlow: BroadcastFlow<IdType> = BroadcastFlow()
+    override val deletedObjectsIdsFlow: Flow<IdType>
+        get() = _deletedObjectsIdsFlow
+
+    protected abstract suspend fun updateObject(newValue: InputValueType, id: IdType, old: ObjectType): ObjectType
+    protected abstract suspend fun createObject(newValue: InputValueType): Pair<IdType, ObjectType>
+
+    override suspend fun create(values: List<InputValueType>): List<ObjectType> {
+        return values.map {
+            val (id, newObject) = createObject(it)
+            map[id] = newObject
+            newObject.also { _ ->
+                _newObjectsFlow.send(newObject)
+            }
+        }
+    }
+
+    override suspend fun update(id: IdType, value: InputValueType): ObjectType? {
+        val newValue = updateObject(value, id, map[id] ?: return null)
+
+        return newValue.also {
+            map[id] = it
+            _updatedObjectsFlow.send(it)
+        }
+    }
+
+    override suspend fun update(values: List<UpdatedValuePair<IdType, InputValueType>>): List<ObjectType> {
+        return values.mapNotNull { update(it.first, it.second) }
+    }
+
+    override suspend fun deleteById(ids: List<IdType>) {
+        ids.forEach {
+            map.remove(it) ?.also { _ -> _deletedObjectsIdsFlow.send(it) }
+        }
+    }
+
+}
+
+abstract class MapCRUDRepo<ObjectType, IdType, InputValueType>(
+    map: MutableMap<IdType, ObjectType>
+) : StandardCRUDRepo<ObjectType, IdType, InputValueType>,
+    ReadStandardCRUDRepo<ObjectType, IdType> by ReadMapCRUDRepo(map),
+    WriteMapCRUDRepo<ObjectType, IdType, InputValueType>(map)
+
+fun <ObjectType, IdType, InputValueType> MapCRUDRepo(
+    map: MutableMap<IdType, ObjectType>,
+    updateCallback: suspend (newValue: InputValueType, id: IdType, old: ObjectType) -> ObjectType,
+    createCallback: suspend (newValue: InputValueType) -> Pair<IdType, ObjectType>
+) = object : MapCRUDRepo<ObjectType, IdType, InputValueType>(map) {
+    override suspend fun updateObject(
+        newValue: InputValueType,
+        id: IdType,
+        old: ObjectType
+    ): ObjectType = updateCallback(newValue, id, old)
+
+    override suspend fun createObject(newValue: InputValueType): Pair<IdType, ObjectType> = createCallback(newValue)
+}
+
+fun <ObjectType, IdType, InputValueType> MutableMap<IdType, ObjectType>.asCrudRepo(
+    updateCallback: suspend (newValue: InputValueType, id: IdType, old: ObjectType) -> ObjectType,
+    createCallback: suspend (newValue: InputValueType) -> Pair<IdType, ObjectType>
+) = MapCRUDRepo(this, updateCallback, createCallback)
diff --git a/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapKeyValueRepo.kt b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapKeyValueRepo.kt
new file mode 100644
index 00000000000..506033e6c70
--- /dev/null
+++ b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapKeyValueRepo.kt
@@ -0,0 +1,74 @@
+package dev.inmo.micro_utils.repos
+
+import dev.inmo.micro_utils.coroutines.BroadcastFlow
+import dev.inmo.micro_utils.pagination.*
+import kotlinx.coroutines.flow.Flow
+
+class ReadMapKeyValueRepo<Key, Value>(
+    private val map: Map<Key, Value> = emptyMap()
+) : ReadStandardKeyValueRepo<Key, Value> {
+    override suspend fun get(k: Key): Value? = map[k]
+
+    override suspend fun values(
+        pagination: Pagination,
+        reversed: Boolean
+    ): PaginationResult<Value> {
+        val firstIndex: Int = if (reversed) {
+            val size = map.size
+            (size - pagination.lastIndex).let { if (it < 0) 0 else it }
+        } else {
+            pagination.firstIndex
+        }
+
+        return map.keys.drop(firstIndex).take(pagination.size).mapNotNull { map[it] }.createPaginationResult(
+            firstIndex,
+            count()
+        )
+    }
+
+    override suspend fun keys(pagination: Pagination, reversed: Boolean): PaginationResult<Key> {
+        val firstIndex: Int = if (reversed) {
+            val size = map.size
+            (size - pagination.lastIndex).let { if (it < 0) 0 else it }
+        } else {
+            pagination.firstIndex
+        }
+
+        return map.keys.drop(firstIndex).take(pagination.size).createPaginationResult(
+            firstIndex,
+            count()
+        )
+    }
+
+    override suspend fun contains(key: Key): Boolean = map.containsKey(key)
+
+    override suspend fun count(): Long = map.size.toLong()
+}
+
+class WriteMapKeyValueRepo<Key, Value>(
+    private val map: MutableMap<Key, Value> = mutableMapOf()
+) : WriteStandardKeyValueRepo<Key, Value> {
+    private val _onNewValue: BroadcastFlow<Pair<Key, Value>> = BroadcastFlow()
+    override val onNewValue: Flow<Pair<Key, Value>>
+        get() = _onNewValue
+    private val _onValueRemoved: BroadcastFlow<Key> = BroadcastFlow()
+    override val onValueRemoved: Flow<Key>
+        get() = _onValueRemoved
+
+    override suspend fun set(k: Key, v: Value) {
+        map[k] = v
+        _onNewValue.send(k to v)
+    }
+
+    override suspend fun unset(k: Key) {
+        map.remove(k) ?.also { _onValueRemoved.send(k) }
+    }
+}
+
+class MapKeyValueRepo<Key, Value>(
+    private val map: MutableMap<Key, Value> = mutableMapOf()
+) : StandardKeyValueRepo<Key, Value>,
+    ReadStandardKeyValueRepo<Key, Value> by ReadMapKeyValueRepo(map),
+    WriteStandardKeyValueRepo<Key, Value> by WriteMapKeyValueRepo(map)
+
+fun <K, V> MutableMap<K, V>.asKeyValueRepo(): StandardKeyValueRepo<K, V> = MapKeyValueRepo(this)
diff --git a/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapOneToManyKeyValueRepo.kt b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapOneToManyKeyValueRepo.kt
new file mode 100644
index 00000000000..266f98c3baa
--- /dev/null
+++ b/repos/inmemory/src/commonMain/kotlin/dev/inmo/micro_utils/repos/MapOneToManyKeyValueRepo.kt
@@ -0,0 +1,82 @@
+package dev.inmo.micro_utils.repos
+
+import dev.inmo.micro_utils.coroutines.BroadcastFlow
+import dev.inmo.micro_utils.pagination.*
+import dev.inmo.micro_utils.pagination.utils.paginate
+import kotlinx.coroutines.flow.Flow
+
+class MapReadOneToManyKeyValueRepo<Key, Value>(
+    private val map: Map<Key, List<Value>> = emptyMap()
+) : ReadOneToManyKeyValueRepo<Key, Value> {
+    override suspend fun get(k: Key, pagination: Pagination, reversed: Boolean): PaginationResult<Value> {
+        val list = map[k] ?: return emptyPaginationResult()
+
+        return list.paginate(
+            if (reversed) {
+                val firstIndex = (map.size - pagination.lastIndex).let { if (it < 0) 0 else it }
+                SimplePagination(firstIndex, pagination.size)
+            } else {
+                pagination
+            }
+        )
+    }
+
+    override suspend fun keys(pagination: Pagination, reversed: Boolean): PaginationResult<Key> {
+        val firstIndex: Int = if (reversed) {
+            val size = map.size
+            (size - pagination.lastIndex).let { if (it < 0) 0 else it }
+        } else {
+            pagination.firstIndex
+        }
+
+        return map.keys.drop(firstIndex).take(pagination.size).createPaginationResult(
+            firstIndex,
+            count()
+        )
+    }
+
+    override suspend fun contains(k: Key): Boolean = map.containsKey(k)
+
+    override suspend fun contains(k: Key, v: Value): Boolean = map[k] ?.contains(v) == true
+
+    override suspend fun count(k: Key): Long = map[k] ?.size ?.toLong() ?: 0L
+
+    override suspend fun count(): Long = map.size.toLong()
+}
+
+class MapWriteOneToManyKeyValueRepo<Key, Value>(
+    private val map: MutableMap<Key, MutableList<Value>> = mutableMapOf()
+) : WriteOneToManyKeyValueRepo<Key, Value> {
+    private val _onNewValue: BroadcastFlow<Pair<Key, Value>> = BroadcastFlow()
+    override val onNewValue: Flow<Pair<Key, Value>>
+        get() = _onNewValue
+    private val _onValueRemoved: BroadcastFlow<Pair<Key, Value>> = BroadcastFlow()
+    override val onValueRemoved: Flow<Pair<Key, Value>>
+        get() = _onValueRemoved
+    private val _onDataCleared: BroadcastFlow<Key> = BroadcastFlow()
+    override val onDataCleared: Flow<Key>
+        get() = _onDataCleared
+
+    override suspend fun add(k: Key, v: Value) {
+        map.getOrPut(k) { mutableListOf() }.add(v)
+        _onNewValue.send(k to v)
+    }
+
+    override suspend fun remove(k: Key, v: Value) {
+        map[k] ?.remove(v) ?.also { _onValueRemoved.send(k to v) }
+    }
+
+    override suspend fun clear(k: Key) {
+        map.remove(k) ?.also { _onDataCleared.send(k) }
+    }
+}
+
+class MapOneToManyKeyValueRepo<Key, Value>(
+    private val map: MutableMap<Key, MutableList<Value>> = mutableMapOf()
+) : OneToManyKeyValueRepo<Key, Value>,
+    ReadOneToManyKeyValueRepo<Key, Value> by MapReadOneToManyKeyValueRepo(map),
+    WriteOneToManyKeyValueRepo<Key, Value> by MapWriteOneToManyKeyValueRepo(map)
+
+fun <K, V> MutableMap<K, List<V>>.asOneToManyKeyValueRepo(): OneToManyKeyValueRepo<K, V> = MapOneToManyKeyValueRepo(
+    map { (k, v) -> k to v.toMutableList() }.toMap().toMutableMap()
+)
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/crud/KtorReadStandardCrudRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/crud/KtorReadStandardCrudRepo.kt
index 082e72a83fb..1a3d3a2bf67 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/crud/KtorReadStandardCrudRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/crud/KtorReadStandardCrudRepo.kt
@@ -47,4 +47,12 @@ class KtorReadStandardCrudRepo<ObjectType, IdType> (
         ),
         Boolean.serializer()
     )
+
+    override suspend fun count(): Long = client.uniget(
+        buildStandardUrl(
+            baseUrl,
+            countRouting
+        ),
+        Long.serializer()
+    )
 }
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartReadKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorReadStandardKeyValueRepo.kt
similarity index 85%
rename from repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartReadKeyValueRepo.kt
rename to repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorReadStandardKeyValueRepo.kt
index 588768223d3..f7c0af2e256 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartReadKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorReadStandardKeyValueRepo.kt
@@ -6,19 +6,19 @@ import dev.inmo.micro_utils.ktor.common.buildStandardUrl
 import dev.inmo.micro_utils.pagination.Pagination
 import dev.inmo.micro_utils.pagination.PaginationResult
 import dev.inmo.micro_utils.pagination.asUrlQueryParts
-import dev.inmo.micro_utils.repos.StandardReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadStandardKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.key_value.*
 import io.ktor.client.*
 import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.serializer
 
-class KtorStandartReadKeyValueRepo<Key, Value> (
+class KtorReadStandardKeyValueRepo<Key, Value> (
     private var baseUrl: String,
     private var client: HttpClient = HttpClient(),
     private var keySerializer: KSerializer<Key>,
     private var valueSerializer: KSerializer<Value>,
     private var valueNullableSerializer: KSerializer<Value?>,
-) : StandardReadKeyValueRepo<Key, Value> {
+) : ReadStandardKeyValueRepo<Key, Value> {
     override suspend fun get(k: Key): Value? = client.uniget(
         buildStandardUrl(
             baseUrl,
@@ -70,4 +70,7 @@ class KtorStandartReadKeyValueRepo<Key, Value> (
         ),
         Long.serializer()
     )
-}
\ No newline at end of file
+}
+
+@Deprecated("Renamed", ReplaceWith("KtorReadStandardKeyValueRepo", "dev.inmo.micro_utils.repos.ktor.client.key_value.KtorReadStandardKeyValueRepo"))
+typealias KtorStandartReadKeyValueRepo<Key, Value> = KtorReadStandardKeyValueRepo<Key, Value>
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartKeyValueRepo.kt
index d81700e52f9..9c7164ab49f 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartKeyValueRepo.kt
@@ -1,8 +1,8 @@
 package dev.inmo.micro_utils.repos.ktor.client.key_value
 
 import dev.inmo.micro_utils.repos.StandardKeyValueRepo
-import dev.inmo.micro_utils.repos.StandardReadKeyValueRepo
-import dev.inmo.micro_utils.repos.StandardWriteKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadStandardKeyValueRepo
+import dev.inmo.micro_utils.repos.WriteStandardKeyValueRepo
 import io.ktor.client.*
 import kotlinx.serialization.KSerializer
 
@@ -14,14 +14,14 @@ class KtorStandartKeyValueRepo<K, V> (
     valueSerializer: KSerializer<V>,
     valueNullableSerializer: KSerializer<V?>
 ) : StandardKeyValueRepo<K, V>,
-    StandardReadKeyValueRepo<K, V> by KtorStandartReadKeyValueRepo(
+    ReadStandardKeyValueRepo<K, V> by KtorReadStandardKeyValueRepo(
         "$baseUrl/$baseSubpart",
         client,
         keySerializer,
         valueSerializer,
         valueNullableSerializer
     ),
-    StandardWriteKeyValueRepo<K, V> by KtorStandartWriteKeyValueRepo(
+    WriteStandardKeyValueRepo<K, V> by KtorWriteStandardKeyValueRepo(
         "$baseUrl/$baseSubpart",
         client,
         keySerializer,
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartWriteKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorWriteStandardKeyValueRepo.kt
similarity index 80%
rename from repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartWriteKeyValueRepo.kt
rename to repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorWriteStandardKeyValueRepo.kt
index e8f11ecebc7..043f21155db 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorStandartWriteKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/key_value/KtorWriteStandardKeyValueRepo.kt
@@ -4,7 +4,7 @@ import dev.inmo.micro_utils.ktor.client.BodyPair
 import dev.inmo.micro_utils.ktor.client.createStandardWebsocketFlow
 import dev.inmo.micro_utils.ktor.client.unipost
 import dev.inmo.micro_utils.ktor.common.buildStandardUrl
-import dev.inmo.micro_utils.repos.StandardWriteKeyValueRepo
+import dev.inmo.micro_utils.repos.WriteStandardKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.key_value.*
 import io.ktor.client.*
 import kotlinx.coroutines.flow.Flow
@@ -12,12 +12,12 @@ import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.PairSerializer
 import kotlinx.serialization.builtins.serializer
 
-class KtorStandartWriteKeyValueRepo<K, V> (
+class KtorWriteStandardKeyValueRepo<K, V> (
     private var baseUrl: String,
     private var client: HttpClient = HttpClient(),
     private var keySerializer: KSerializer<K>,
     private var valueSerializer: KSerializer<V>,
-) : StandardWriteKeyValueRepo<K, V> {
+) : WriteStandardKeyValueRepo<K, V> {
     override val onNewValue: Flow<Pair<K, V>> = client.createStandardWebsocketFlow(
         buildStandardUrl(baseUrl, onNewValueRoute),
         deserializer = PairSerializer(keySerializer, valueSerializer)
@@ -45,4 +45,7 @@ class KtorStandartWriteKeyValueRepo<K, V> (
         BodyPair(keySerializer, k),
         Unit.serializer()
     )
-}
\ No newline at end of file
+}
+
+@Deprecated("Renamed", ReplaceWith("KtorWriteStandardKeyValueRepo", "dev.inmo.micro_utils.repos.ktor.client.key_value.KtorWriteStandardKeyValueRepo"))
+typealias KtorStandartWriteKeyValueRepo<K, V> = KtorWriteStandardKeyValueRepo<K, V>
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyKeyValueRepo.kt
index d6107824816..8dc20ae25ad 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyKeyValueRepo.kt
@@ -1,8 +1,8 @@
 package dev.inmo.micro_utils.repos.ktor.client.one_to_many
 
 import dev.inmo.micro_utils.repos.OneToManyKeyValueRepo
-import dev.inmo.micro_utils.repos.OneToManyReadKeyValueRepo
-import dev.inmo.micro_utils.repos.OneToManyWriteKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadOneToManyKeyValueRepo
+import dev.inmo.micro_utils.repos.WriteOneToManyKeyValueRepo
 import io.ktor.client.HttpClient
 import kotlinx.serialization.KSerializer
 
@@ -13,13 +13,13 @@ class KtorOneToManyKeyValueRepo<Key, Value>(
     keySerializer: KSerializer<Key>,
     valueSerializer: KSerializer<Value>,
 ) : OneToManyKeyValueRepo<Key, Value>,
-    OneToManyReadKeyValueRepo<Key, Value> by KtorOneToManyReadKeyValueRepo<Key, Value> (
+    ReadOneToManyKeyValueRepo<Key, Value> by KtorReadOneToManyKeyValueRepo<Key, Value> (
         "$baseUrl/$baseSubpart",
         client,
         keySerializer,
         valueSerializer,
     ),
-    OneToManyWriteKeyValueRepo<Key, Value> by KtorOneToManyWriteKeyValueRepo<Key, Value> (
+    WriteOneToManyKeyValueRepo<Key, Value> by KtorWriteOneToManyKeyValueRepo<Key, Value> (
         "$baseUrl/$baseSubpart",
         client,
         keySerializer,
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyReadKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorReadOneToManyKeyValueRepo.kt
similarity index 95%
rename from repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyReadKeyValueRepo.kt
rename to repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorReadOneToManyKeyValueRepo.kt
index 0df6f253bf8..5dd4e23c9b8 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyReadKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorReadOneToManyKeyValueRepo.kt
@@ -6,18 +6,18 @@ import dev.inmo.micro_utils.ktor.common.buildStandardUrl
 import dev.inmo.micro_utils.pagination.Pagination
 import dev.inmo.micro_utils.pagination.PaginationResult
 import dev.inmo.micro_utils.pagination.asUrlQueryParts
-import dev.inmo.micro_utils.repos.OneToManyReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadOneToManyKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.one_to_many.*
 import io.ktor.client.HttpClient
 import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.serializer
 
-class KtorOneToManyReadKeyValueRepo<Key, Value> (
+class KtorReadOneToManyKeyValueRepo<Key, Value> (
     private val baseUrl: String,
     private val client: HttpClient = HttpClient(),
     private val keySerializer: KSerializer<Key>,
     private val valueSerializer: KSerializer<Value>,
-) : OneToManyReadKeyValueRepo<Key, Value> {
+) : ReadOneToManyKeyValueRepo<Key, Value> {
     private val paginationValueResultSerializer = PaginationResult.serializer(valueSerializer)
     private val paginationKeyResultSerializer = PaginationResult.serializer(keySerializer)
 
diff --git a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyWriteKeyValueRepo.kt b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorWriteOneToManyKeyValueRepo.kt
similarity index 56%
rename from repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyWriteKeyValueRepo.kt
rename to repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorWriteOneToManyKeyValueRepo.kt
index d714855ae25..3022463da8a 100644
--- a/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorOneToManyWriteKeyValueRepo.kt
+++ b/repos/ktor/client/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/client/one_to_many/KtorWriteOneToManyKeyValueRepo.kt
@@ -1,22 +1,36 @@
 package dev.inmo.micro_utils.repos.ktor.client.one_to_many
 
-import dev.inmo.micro_utils.ktor.client.BodyPair
-import dev.inmo.micro_utils.ktor.client.unipost
+import dev.inmo.micro_utils.coroutines.broadcastStateFlow
+import dev.inmo.micro_utils.ktor.client.*
 import dev.inmo.micro_utils.ktor.common.buildStandardUrl
-import dev.inmo.micro_utils.repos.OneToManyWriteKeyValueRepo
+import dev.inmo.micro_utils.repos.WriteOneToManyKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.one_to_many.*
 import io.ktor.client.HttpClient
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.Flow
 import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.PairSerializer
 import kotlinx.serialization.builtins.serializer
 
-class KtorOneToManyWriteKeyValueRepo<Key, Value> (
+class KtorWriteOneToManyKeyValueRepo<Key, Value> (
     private val baseUrl: String,
     private val client: HttpClient = HttpClient(),
     private val keySerializer: KSerializer<Key>,
-    private val valueSerializer: KSerializer<Value>,
-) : OneToManyWriteKeyValueRepo<Key, Value> {
+    private val valueSerializer: KSerializer<Value>
+) : WriteOneToManyKeyValueRepo<Key, Value> {
     private val keyValueSerializer = PairSerializer(keySerializer, valueSerializer)
+    override val onNewValue: Flow<Pair<Key, Value>> = client.createStandardWebsocketFlow(
+        buildStandardUrl(baseUrl, onNewValueRoute),
+        deserializer = keyValueSerializer
+    )
+    override val onValueRemoved: Flow<Pair<Key, Value>> = client.createStandardWebsocketFlow(
+        buildStandardUrl(baseUrl, onValueRemovedRoute),
+        deserializer = keyValueSerializer
+    )
+    override val onDataCleared: Flow<Key> = client.createStandardWebsocketFlow(
+        buildStandardUrl(baseUrl, onDataClearedRoute),
+        deserializer = keySerializer
+    )
 
     override suspend fun add(k: Key, v: Value) = client.unipost(
         buildStandardUrl(
diff --git a/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/crud/CrudReadRoutes.kt b/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/crud/CrudReadRoutes.kt
index dc44163c26e..00348cc409d 100644
--- a/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/crud/CrudReadRoutes.kt
+++ b/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/crud/CrudReadRoutes.kt
@@ -3,3 +3,4 @@ package dev.inmo.micro_utils.repos.ktor.common.crud
 const val getByPaginationRouting = "getByPagination"
 const val getByIdRouting = "getById"
 const val containsRouting = "contains"
+const val countRouting = "count"
diff --git a/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/one_to_many/OneToManyRoutes.kt b/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/one_to_many/OneToManyRoutes.kt
index ed56f7ced53..637edd9bda1 100644
--- a/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/one_to_many/OneToManyRoutes.kt
+++ b/repos/ktor/common/src/commonMain/kotlin/dev/inmo/micro_utils/repos/ktor/common/one_to_many/OneToManyRoutes.kt
@@ -7,6 +7,10 @@ const val containsByKeyValueRoute = "containsByKeyValue"
 const val countByKeyRoute = "countByKey"
 const val countRoute = "count"
 
+const val onNewValueRoute = "onNewValue"
+const val onValueRemovedRoute = "onValueRemoved"
+const val onDataClearedRoute = "onDataCleared"
+
 const val addRoute = "add"
 const val removeRoute = "remove"
 const val clearRoute = "clear"
\ No newline at end of file
diff --git a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/crud/KtorReadStandardCrudRepo.kt b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/crud/KtorReadStandardCrudRepo.kt
index d876840b033..c270f8e47b9 100644
--- a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/crud/KtorReadStandardCrudRepo.kt
+++ b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/crud/KtorReadStandardCrudRepo.kt
@@ -2,12 +2,10 @@ package dev.inmo.micro_utils.repos.ktor.server.crud
 
 import dev.inmo.micro_utils.ktor.server.decodeUrlQueryValueOrSendError
 import dev.inmo.micro_utils.ktor.server.unianswer
-import dev.inmo.micro_utils.repos.ktor.common.crud.containsRouting
-import dev.inmo.micro_utils.repos.ktor.common.crud.getByIdRouting
-import dev.inmo.micro_utils.repos.ktor.common.crud.getByPaginationRouting
 import dev.inmo.micro_utils.pagination.PaginationResult
 import dev.inmo.micro_utils.pagination.extractPagination
 import dev.inmo.micro_utils.repos.ReadStandardCRUDRepo
+import dev.inmo.micro_utils.repos.ktor.common.crud.*
 import io.ktor.application.call
 import io.ktor.routing.Route
 import io.ktor.routing.get
@@ -54,4 +52,11 @@ fun <ObjectType, IdType> Route.configureReadStandardCrudRepoRoutes(
             originalRepo.contains(id)
         )
     }
+
+    get(countRouting) {
+        call.unianswer(
+            Long.serializer(),
+            originalRepo.count()
+        )
+    }
 }
diff --git a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartReadKeyValueRepo.kt b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartReadKeyValueRepo.kt
index d55d3a57b63..ab52eba53f0 100644
--- a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartReadKeyValueRepo.kt
+++ b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartReadKeyValueRepo.kt
@@ -4,7 +4,7 @@ import dev.inmo.micro_utils.ktor.server.decodeUrlQueryValueOrSendError
 import dev.inmo.micro_utils.ktor.server.unianswer
 import dev.inmo.micro_utils.pagination.PaginationResult
 import dev.inmo.micro_utils.pagination.extractPagination
-import dev.inmo.micro_utils.repos.StandardReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadStandardKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.key_value.*
 import io.ktor.application.*
 import io.ktor.routing.*
@@ -12,7 +12,7 @@ import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.serializer
 
 fun <K, V> Route.configureReadStandartKeyValueRepoRoutes (
-    originalRepo: StandardReadKeyValueRepo<K, V>,
+    originalRepo: ReadStandardKeyValueRepo<K, V>,
     keySerializer: KSerializer<K>,
     valueSerializer: KSerializer<V>,
     valueNullableSerializer: KSerializer<V?>,
diff --git a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartWriteKeyValueRepo.kt b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartWriteKeyValueRepo.kt
index e075249b1bc..249bcbc4741 100644
--- a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartWriteKeyValueRepo.kt
+++ b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/key_value/KtorStandartWriteKeyValueRepo.kt
@@ -2,7 +2,7 @@ package dev.inmo.micro_utils.repos.ktor.server.key_value
 
 import dev.inmo.micro_utils.ktor.server.includeWebsocketHandling
 import dev.inmo.micro_utils.ktor.server.uniload
-import dev.inmo.micro_utils.repos.StandardWriteKeyValueRepo
+import dev.inmo.micro_utils.repos.WriteStandardKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.key_value.*
 import io.ktor.application.*
 import io.ktor.routing.*
@@ -10,7 +10,7 @@ import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.PairSerializer
 
 fun <K, V> Route.configureWriteStandartKeyValueRepoRoutes (
-    originalRepo: StandardWriteKeyValueRepo<K, V>,
+    originalRepo: WriteStandardKeyValueRepo<K, V>,
     keySerializer: KSerializer<K>,
     valueSerializer: KSerializer<V>,
 ) {
diff --git a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyReadKeyValueRepoRoutes.kt b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyReadKeyValueRepoRoutes.kt
index 0ef8beaeca0..07976b2e78e 100644
--- a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyReadKeyValueRepoRoutes.kt
+++ b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyReadKeyValueRepoRoutes.kt
@@ -5,7 +5,7 @@ import dev.inmo.micro_utils.ktor.server.decodeUrlQueryValueOrSendError
 import dev.inmo.micro_utils.ktor.server.unianswer
 import dev.inmo.micro_utils.pagination.PaginationResult
 import dev.inmo.micro_utils.pagination.extractPagination
-import dev.inmo.micro_utils.repos.OneToManyReadKeyValueRepo
+import dev.inmo.micro_utils.repos.ReadOneToManyKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.one_to_many.*
 import io.ktor.application.call
 import io.ktor.routing.Route
@@ -14,7 +14,7 @@ import kotlinx.serialization.KSerializer
 import kotlinx.serialization.builtins.serializer
 
 fun <Key, Value> Route.configureOneToManyReadKeyValueRepoRoutes(
-    originalRepo: OneToManyReadKeyValueRepo<Key, Value>,
+    originalRepo: ReadOneToManyKeyValueRepo<Key, Value>,
     keySerializer: KSerializer<Key>,
     valueSealizer: KSerializer<Value>,
 ) {
diff --git a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyWriteKeyValueRepoRoutes.kt b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyWriteKeyValueRepoRoutes.kt
index f39e0ee3b48..788ea78a16a 100644
--- a/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyWriteKeyValueRepoRoutes.kt
+++ b/repos/ktor/server/src/jvmMain/kotlin/dev/inmo/micro_utils/repos/ktor/server/one_to_many/ConfigureOneToManyWriteKeyValueRepoRoutes.kt
@@ -1,8 +1,7 @@
 package dev.inmo.micro_utils.repos.ktor.server.one_to_many
 
-import dev.inmo.micro_utils.ktor.server.unianswer
-import dev.inmo.micro_utils.ktor.server.uniload
-import dev.inmo.micro_utils.repos.OneToManyWriteKeyValueRepo
+import dev.inmo.micro_utils.ktor.server.*
+import dev.inmo.micro_utils.repos.WriteOneToManyKeyValueRepo
 import dev.inmo.micro_utils.repos.ktor.common.one_to_many.*
 import io.ktor.application.call
 import io.ktor.routing.Route
@@ -12,12 +11,28 @@ import kotlinx.serialization.builtins.PairSerializer
 import kotlinx.serialization.builtins.serializer
 
 fun <Key, Value> Route.configureOneToManyWriteKeyValueRepoRoutes(
-    originalRepo: OneToManyWriteKeyValueRepo<Key, Value>,
+    originalRepo: WriteOneToManyKeyValueRepo<Key, Value>,
     keySerializer: KSerializer<Key>,
     valueSealizer: KSerializer<Value>,
 ) {
     val keyValueSerializer = PairSerializer(keySerializer, valueSealizer)
 
+    includeWebsocketHandling(
+        onNewValueRoute,
+        originalRepo.onNewValue,
+        keyValueSerializer
+    )
+    includeWebsocketHandling(
+        onValueRemovedRoute,
+        originalRepo.onValueRemoved,
+        keyValueSerializer
+    )
+    includeWebsocketHandling(
+        onDataClearedRoute,
+        originalRepo.onDataCleared,
+        keySerializer
+    )
+
     post(addRoute) {
         val obj = call.uniload(
             keyValueSerializer
diff --git a/settings.gradle b/settings.gradle
index 333d1080497..54fb4ed3371 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -9,6 +9,7 @@ String[] includes = [
     ":mime_types",
     ":repos:common",
     ":repos:exposed",
+    ":repos:inmemory",
     ":repos:ktor:client",
     ":repos:ktor:common",
     ":repos:ktor:server",