diff --git a/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/ic/CacheAccessors.kt b/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/ic/CacheAccessors.kt
index 66aa116045c..580d8441782 100644
--- a/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/ic/CacheAccessors.kt
+++ b/compiler/ir/serialization.js/src/org/jetbrains/kotlin/ir/backend/js/ic/CacheAccessors.kt
@@ -15,6 +15,8 @@ private const val inlineGraphFile = "inline.graph"
 private const val inlineFunctionsFile = "inline.functions"
 private const val fileInfoFile = "file.info"
 private const val fileBinaryAst = "binary.ast"
+private const val fileBinaryDts = "binary.dst"
+private const val fileSourceMap = "source.map"
 
 typealias Hash = Long // Any long hash
 typealias FlatHash = Hash // Hash of inline function without its underlying inline call tree
@@ -28,6 +30,9 @@ private fun createFileCacheId(fileName: String): String = md5.digest(fileName.en
 
 class ICCache(val dataProvider: PersistentCacheProvider, val dataConsumer: PersistentCacheConsumer, val serializedIcData: SerializedIcData)
 
+class FileCache(val name: String, var ast: ByteArray?, var dts: ByteArray?, var sourceMap: ByteArray?)
+class ModuleCache(val name: String, val asts: Map<String, FileCache>)
+
 interface PersistentCacheProvider {
     fun fileFingerPrint(path: String): Hash
 
@@ -41,6 +46,10 @@ interface PersistentCacheProvider {
 
     fun binaryAst(path: String): ByteArray?
 
+    fun dts(path: String): ByteArray?
+
+    fun sourceMap(path: String): ByteArray?
+
     companion object {
         val EMPTY = object : PersistentCacheProvider {
             override fun fileFingerPrint(path: String): Hash {
@@ -67,6 +76,13 @@ interface PersistentCacheProvider {
                 return ByteArray(0)
             }
 
+            override fun dts(path: String): ByteArray? {
+                return null
+            }
+
+            override fun sourceMap(path: String): ByteArray? {
+                return null
+            }
         }
     }
 }
@@ -144,13 +160,24 @@ class PersistentCacheProviderImpl(private val cachePath: String) : PersistentCac
         return result
     }
 
-    override fun binaryAst(path: String): ByteArray? {
-        val cachePath = path.fileDir
-        val astFile = File(cachePath, fileBinaryAst)
-        if (astFile.exists()) return astFile.readBytes()
+    private fun readBytesFromCacheFile(fileName: String, cacheName: String): ByteArray? {
+        val cachePath = fileName.fileDir
+        val cacheFile = File(cachePath, cacheName)
+        if (cacheFile.exists()) return cacheFile.readBytes()
         return null
     }
 
+    override fun binaryAst(path: String): ByteArray? {
+        return readBytesFromCacheFile(path, fileBinaryAst)
+    }
+
+    override fun dts(path: String): ByteArray? {
+        return readBytesFromCacheFile(path, fileBinaryDts)
+    }
+
+    override fun sourceMap(path: String): ByteArray? {
+        return readBytesFromCacheFile(path, fileSourceMap)
+    }
 }
 
 interface PersistentCacheConsumer {
@@ -159,6 +186,8 @@ interface PersistentCacheConsumer {
     fun commitInlineGraph(path: String, hashes: Collection<Pair<IdSignature, TransHash>>, sigResolver: (IdSignature) -> Int)
     fun commitICCacheData(path: String, icData: SerializedIcDataForFile)
     fun commitBinaryAst(path: String, astData: ByteArray)
+    fun commitBinaryDts(path: String, dstData: ByteArray)
+    fun commitSourceMap(path: String, mapData: ByteArray)
     fun invalidateForFile(path: String)
 
     fun commitLibraryPath(libraryPath: String)
@@ -196,6 +225,13 @@ interface PersistentCacheConsumer {
 
             }
 
+            override fun commitBinaryDts(path: String, dstData: ByteArray) {
+
+            }
+
+            override fun commitSourceMap(path: String, mapData: ByteArray) {
+
+            }
         }
     }
 }
@@ -263,13 +299,25 @@ class PersistentCacheConsumerImpl(private val cachePath: String) : PersistentCac
         //fileDir.deleteRecursively()
     }
 
-    override fun commitBinaryAst(path: String, astData: ByteArray) {
-        val fileId = createFileCacheId(path)
+    private fun commitByteArrayToCacheFile(fileName: String, cacheName: String, data: ByteArray) {
+        val fileId = createFileCacheId(fileName)
         val cacheDir = File(File(cachePath), fileId)
-        val astFile = File(cacheDir, fileBinaryAst)
-        if (astFile.exists()) astFile.delete()
-        astFile.createNewFile()
-        astFile.writeBytes(astData)
+        val cacheFile = File(cacheDir, cacheName)
+        if (cacheFile.exists()) cacheFile.delete()
+        cacheFile.createNewFile()
+        cacheFile.writeBytes(data)
+    }
+
+    override fun commitBinaryAst(path: String, astData: ByteArray) {
+        commitByteArrayToCacheFile(path, fileBinaryAst, astData)
+    }
+
+    override fun commitBinaryDts(path: String, dstData: ByteArray) {
+        commitByteArrayToCacheFile(path, fileBinaryDts, dstData)
+    }
+
+    override fun commitSourceMap(path: String, mapData: ByteArray) {
+        commitByteArrayToCacheFile(path, fileSourceMap, mapData)
     }
 
     override fun commitLibraryPath(libraryPath: String) {