diff --git a/build.gradle.kts b/build.gradle.kts
index 76ce09d..23bfa04 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -15,6 +15,9 @@ dependencies {
     testImplementation(kotlin("test"))
 
     implementation("org.ow2.asm:asm:9.2")
+    implementation("org.ow2.asm:asm-util:9.2")
+    implementation("org.ow2.asm:asm-tree:9.2")
+    implementation("org.ow2.asm:asm-commons:9.2")
 }
 
 tasks.test {
diff --git a/src/main/kotlin/net/revanced/patcher/Patcher.kt b/src/main/kotlin/net/revanced/patcher/Patcher.kt
index 77d9b0e..e4450a1 100644
--- a/src/main/kotlin/net/revanced/patcher/Patcher.kt
+++ b/src/main/kotlin/net/revanced/patcher/Patcher.kt
@@ -1,10 +1,10 @@
 package net.revanced.patcher
 
 import net.revanced.patcher.patch.Patch
-import net.revanced.patcher.patch.PatchResult
 import net.revanced.patcher.signature.Signature
 import net.revanced.patcher.store.PatchStore
 import net.revanced.patcher.store.SignatureStore
+import org.objectweb.asm.Opcodes
 import java.io.InputStream
 
 class Patcher(
@@ -17,9 +17,12 @@ class Patcher(
         PatchStore.addPatches(*patches)
     }
 
-    fun patch() {
-        PatchStore.patches.forEach {
-
+    fun patch(): String? {
+        for (patch in PatchStore.patches) {
+            val result = patch.execute()
+            if (result.isSuccess()) continue
+            return result.error()!!.errorMessage()
         }
+        return null
     }
 }
\ No newline at end of file
diff --git a/src/main/kotlin/net/revanced/patcher/patch/Patch.kt b/src/main/kotlin/net/revanced/patcher/patch/Patch.kt
index b1bd57a..d671687 100644
--- a/src/main/kotlin/net/revanced/patcher/patch/Patch.kt
+++ b/src/main/kotlin/net/revanced/patcher/patch/Patch.kt
@@ -1,8 +1,9 @@
 package net.revanced.patcher.patch
 
-
 class Patch(val fn: () -> PatchResult) {
     fun execute(): PatchResult {
         return fn()
     }
 }
+
+
diff --git a/src/main/kotlin/net/revanced/patcher/patch/PatchResult.kt b/src/main/kotlin/net/revanced/patcher/patch/PatchResult.kt
index 8bc239f..73c93b4 100644
--- a/src/main/kotlin/net/revanced/patcher/patch/PatchResult.kt
+++ b/src/main/kotlin/net/revanced/patcher/patch/PatchResult.kt
@@ -7,12 +7,21 @@ interface PatchResult {
         }
         return null
     }
+
     fun success(): PatchResultSuccess? {
         if (this is PatchResultSuccess) {
             return this
         }
         return null
     }
+
+    fun isError(): Boolean {
+        return this is PatchResultError
+    }
+
+    fun isSuccess(): Boolean {
+        return this is PatchResultSuccess
+    }
 }
 
 class PatchResultError(private val errorMessage: String) : PatchResult {
diff --git a/src/main/kotlin/net/revanced/patcher/store/MethodStore.kt b/src/main/kotlin/net/revanced/patcher/store/MethodStore.kt
new file mode 100644
index 0000000..19504da
--- /dev/null
+++ b/src/main/kotlin/net/revanced/patcher/store/MethodStore.kt
@@ -0,0 +1,5 @@
+package net.revanced.patcher.store
+
+object MethodStore {
+    val methods: Map<String, MethodNode> = mutableMapOf()
+}
\ No newline at end of file
diff --git a/src/test/kotlin/net/revanced/patcher/PatcherTest.kt b/src/test/kotlin/net/revanced/patcher/PatcherTest.kt
index a72dea8..aab519e 100644
--- a/src/test/kotlin/net/revanced/patcher/PatcherTest.kt
+++ b/src/test/kotlin/net/revanced/patcher/PatcherTest.kt
@@ -1,16 +1,15 @@
 package net.revanced.patcher
 
 import net.revanced.patcher.patch.Patch
-import net.revanced.patcher.patch.PatchResult
 import net.revanced.patcher.patch.PatchResultError
-import net.revanced.patcher.patch.PatchResultSuccess
 import org.junit.jupiter.api.Test
 
-import org.junit.jupiter.api.Assertions.*
-
 internal class PatcherTest {
     @Test
     fun template() {
+        val adRemoverPatch = Patch {
 
+            PatchResultError("")
+        }
     }
 }
\ No newline at end of file