1 files changed, 17 insertions, 4 deletions
diff --git a/src/js/builtins/builtins.d.ts b/src/js/builtins/builtins.d.ts
index 57bde34a4..1b585ae7a 100644
--- a/src/js/builtins/builtins.d.ts
+++ b/src/js/builtins/builtins.d.ts
@@ -57,7 +57,10 @@ declare function $getPromiseInternalField<K extends PromiseFieldType, V>(
   promise: Promise<V>,
   key: K,
 ): PromiseFieldToValue<K, V>;
-declare function $getInternalField(base: any, number: number): any;
+declare function $getInternalField<Fields extends any[], N extends keyof Fields>(
+  base: InternalFieldObject<Fields>,
+  number: N,
+): Fields[N];
 declare function $fulfillPromise(...args: any[]): TODO;
 declare function $evaluateCommonJSModule(...args: any[]): TODO;
 declare function $loadCJS2ESM(...args: any[]): TODO;
@@ -111,7 +114,11 @@ declare function $putByIdDirectPrivate(obj: any, key: PropertyKey, value: any):
 declare function $putByValDirect(obj: any, key: PropertyKey, value: any): void;
 declare function $putByValWithThisSloppy(): TODO;
 declare function $putByValWithThisStrict(): TODO;
-declare function $putInternalField(base: any, number: number, value: any): any;
+declare function $putInternalField<Fields extends any[], N extends keyof Fields>(
+  base: InternalFieldObject<Fields>,
+  number: N,
+  value: Fields[N],
+): void;
 declare function $putPromiseInternalField<T extends PromiseFieldType, P extends Promise<any>>(
   promise: P,
   key: T,
@@ -157,8 +164,8 @@ declare const $promiseStateRejected: number;
 declare const $promiseStateMask: number;
 declare const $promiseFlagsIsHandled: number;
 declare const $promiseFlagsIsFirstResolvingFunctionCalled: number;
-declare const $promiseFieldFlags: unique symbol;
-declare const $promiseFieldReactionsOrResult: unique symbol;
+declare const $promiseFieldFlags: 0;
+declare const $promiseFieldReactionsOrResult: 1;
 declare const $proxyFieldTarget: TODO;
 declare const $proxyFieldHandler: TODO;
 declare const $generatorFieldState: TODO;
@@ -192,6 +199,7 @@ declare const $AsyncGeneratorSuspendReasonYield: TODO;
 declare const $AsyncGeneratorSuspendReasonAwait: TODO;
 declare const $AsyncGeneratorSuspendReasonNone: TODO;
 declare const $abstractModuleRecordFieldState: TODO;
+declare const $asyncContext: InternalFieldObject<[ReadonlyArray<any> | undefined]>;
 
 // We define our intrinsics in ./BunBuiltinNames.h. Some of those are globals.
 
@@ -420,6 +428,11 @@ declare function $newPromiseCapability(C: PromiseConstructor): TODO;
 declare function $makeTypeError(message: string): TypeError;
 declare function $newHandledRejectedPromise(error: unknown): Promise<never>;
 
+declare const __internal: unique symbol;
+interface InternalFieldObject<T extends any[]> {
+  [__internal]: T;
+}
+
 // Types used in the above functions
 type PromiseFieldType = typeof $promiseFieldFlags | typeof $promiseFieldReactionsOrResult;
 type PromiseFieldToValue<X extends PromiseFieldType, V> = X extends typeof $promiseFieldFlags