diff --git a/tealscript_contracts/kitchen-sink-tealscript.algo.ts b/tealscript_contracts/kitchen-sink-tealscript.algo.ts
index cc2d027..acb229f 100644
--- a/tealscript_contracts/kitchen-sink-tealscript.algo.ts
+++ b/tealscript_contracts/kitchen-sink-tealscript.algo.ts
@@ -1,70 +1,96 @@
-import { Contract } from "@algorandfoundation/tealscript";
+import {
+  abimethod,
+  Account,
+  Application,
+  assert,
+  assertMatch,
+  BigUint,
+  biguint,
+  Box,
+  BoxMap,
+  BoxRef,
+  bytes,
+  Bytes,
+  Contract,
+  Global,
+  GlobalState,
+  gtxn,
+  LocalState,
+  Txn,
+  Uint64,
+  uint64,
+} from "@algorandfoundation/algorand-typescript";
+import {
+  DynamicArray,
+  UintN,
+} from "@algorandfoundation/algorand-typescript/arc4";
 
 export class KitchenSinkContract extends Contract {
-  globalInt = GlobalStateKey<uint64>();
-  globalString = GlobalStateKey<string>({ key: "customKey" });
+  globalInt = GlobalState({ initialValue: Uint64(4) });
+  globalString = GlobalState<string>({ key: "customKey" });
 
-  localBigInt = LocalStateKey<uint<512>>();
+  localBigInt = LocalState<biguint>();
 
-  boxOfArray = BoxKey<uint64[]>({ key: "b" });
-  boxMap = BoxMap<Address, bytes>({ prefix: "" });
-  boxRef = BoxKey<bytes>({ key: "FF" });
+  boxOfArray = Box<DynamicArray<UintN<64>>>({ key: "b" });
+  boxMap = BoxMap<Account, bytes>({ keyPrefix: "" });
+  boxRef = BoxRef({ key: Bytes.fromHex("FF") });
 
   useState(a: uint64, b: string, c: uint64) {
     this.globalInt.value *= a;
-    if (this.globalString.exists) {
+    if (this.globalString.hasValue) {
       this.globalString.value += b;
     } else {
       this.globalString.value = b;
     }
-    if (this.txn.sender.isOptedInToApp(this.app.id)) {
-      this.localBigInt(this.txn.sender).value = <uint<512>>(c * a);
+    if (Txn.sender.isOptedIn(Global.currentApplicationId)) {
+      this.localBigInt(Txn.sender).value = BigUint(c) * BigUint(a);
     }
   }
 
-  createApplication() {
-    this.globalInt.value = 4;
-    this.globalInt.value = this.app.id;
+  @abimethod({ onCreate: "require", allowActions: "NoOp" })
+  createApp() {
+    this.globalInt.value = Global.currentApplicationId.id;
   }
 
-  optInToApplication() {}
+  @abimethod({ allowActions: ["OptIn"] })
+  optIn() {}
 
   addToBox(x: uint64) {
     if (!this.boxOfArray.exists) {
-      this.boxOfArray.value = [x];
+      this.boxOfArray.value = new DynamicArray(new UintN<64>(x));
     } else {
-      this.boxOfArray.value.push(x);
+      this.boxOfArray.value.push(new UintN<64>(x));
     }
   }
 
   addToBoxMap(x: string) {
-    this.boxMap(this.txn.sender).value = x;
+    this.boxMap.set(Txn.sender, Bytes(x));
   }
 
   insertIntoBoxRef(content: bytes, offset: uint64, boxSize: uint64) {
     assert(offset + content.length < boxSize);
     if (this.boxRef.exists) {
-      this.boxRef.create(boxSize);
-    } else if (this.boxRef.size !== boxSize) {
+      this.boxRef.create({ size: boxSize });
+    } else if (this.boxRef.length !== boxSize) {
       this.boxRef.resize(boxSize);
     }
     this.boxRef.splice(offset, offset + content.length, content);
   }
 
   sayHello(name: string, a: uint64): string {
-    return this.getHello() + name + itob(a);
+    return `${this.getHello()} ${name} ${Bytes(a)}`;
   }
 
-  checkTransaction(pay: PayTxn) {
-    verifyPayTxn(pay, {
-      amount: { greaterThan: 1000, lessThan: 2000 },
-      lastValid: { greaterThan: globals.round },
-      sender: this.txn.sender,
-      receiver: this.app.address,
+  checkTransaction(pay: gtxn.PaymentTxn) {
+    assertMatch(pay, {
+      amount: { between: [1000, 2000] },
+      lastValid: { greaterThan: Global.round },
+      sender: Txn.sender,
+      receiver: Global.currentApplicationId.address,
     });
   }
 
-  private getHello(): string {
+  private getHello() {
     return "Hello";
   }
 }