Switch 32-bit platforms to using 64-bit "pointers"
[ldk-java] / typescript_strings.py
index 2979481d1e9ab4648d4d532246e090284923e3ea..e4d4c3ebec8f06db3b58e7cc4e92e2bad767bb7b 100644 (file)
@@ -36,22 +36,27 @@ class Consts:
 
         self.bindings_header = """
 import * as version from './version.mjs';
+import { UInt5, WitnessVersion } from './structs/CommonBase.mjs';
 
 const imports: any = {};
 imports.env = {};
 
 var js_objs: Array<WeakRef<object>> = [];
 var js_invoke: Function;
+var getRandomValues: Function;
 
 imports.wasi_snapshot_preview1 = {
-       "fd_write": (fd: number, iovec_array_ptr: number, iovec_array_len: number) => {
+       "fd_write": (fd: number, iovec_array_ptr: number, iovec_array_len: number, bytes_written_ptr: number) => {
                // This should generally only be used to print panic messages
-               console.log("FD_WRITE to " + fd + " in " + iovec_array_len + " chunks.");
                const ptr_len_view = new Uint32Array(wasm.memory.buffer, iovec_array_ptr, iovec_array_len * 2);
+               var bytes_written = 0;
                for (var i = 0; i < iovec_array_len; i++) {
                        const bytes_view = new Uint8Array(wasm.memory.buffer, ptr_len_view[i*2], ptr_len_view[i*2+1]);
-                       console.log(String.fromCharCode(...bytes_view));
+                       console.log("[fd " + fd + "]: " + String.fromCharCode(...bytes_view));
+                       bytes_written += ptr_len_view[i*2+1];
                }
+               const written_view = new Uint32Array(wasm.memory.buffer, bytes_written_ptr, 1);
+               written_view[0] = bytes_written;
                return 0;
        },
        "fd_close": (_fd: number) => {
@@ -66,28 +71,22 @@ imports.wasi_snapshot_preview1 = {
        },
        "random_get": (buf_ptr: number, buf_len: number) => {
                const buf = new Uint8Array(wasm.memory.buffer, buf_ptr, buf_len);
-               crypto.getRandomValues(buf);
+               getRandomValues(buf);
                return 0;
        },
        "environ_sizes_get": (environ_var_count_ptr: number, environ_len_ptr: number) => {
                // This is called before fd_write to format + print panic messages
-               console.log("wasi_snapshot_preview1:environ_sizes_get");
                const out_count_view = new Uint32Array(wasm.memory.buffer, environ_var_count_ptr, 1);
-               out_count_view[0] = 1;
+               out_count_view[0] = 0;
                const out_len_view = new Uint32Array(wasm.memory.buffer, environ_len_ptr, 1);
-               out_len_view[0] = "RUST_BACKTRACE=1".length + 1; // Note that string must be NULL-terminated
+               out_len_view[0] = 0;
                return 0;
        },
        "environ_get": (environ_ptr: number, environ_buf_ptr: number) => {
-               // This is called before fd_write to format + print panic messages
+               // This is called before fd_write to format + print panic messages,
+               // but only if we have variables in environ_sizes_get, so shouldn't ever actually happen!
                console.log("wasi_snapshot_preview1:environ_get");
-               const out_ptrs = new Uint32Array(wasm.memory.buffer, environ_ptr, 2);
-               out_ptrs[0] = environ_buf_ptr;
-               out_ptrs[1] = "RUST_BACKTRACE=1".length;
-               const out_environ = new Uint8Array(wasm.memory.buffer, environ_buf_ptr, out_ptrs[1]);
-               for (var i = 0; i < out_ptrs[1]; i++) { out_environ[i] = "RUST_BACKTRACE=1".codePointAt(i); }
-               out_environ[out_ptrs[1]] = 0;
-               return 0;
+               return 58; // Note supported - we said there were 0 environment entries!
        },
        "proc_exit" : () => {
                console.log("wasi_snapshot_preview1:proc_exit");
@@ -96,92 +95,121 @@ imports.wasi_snapshot_preview1 = {
 
 var wasm: any = null;
 let isWasmInitialized: boolean = false;
-"""
 
-        if target == Target.NODEJS:
-            self.bindings_header += """import * as fs from 'fs';
-import { webcrypto as crypto } from 'crypto';
-/* @internal */
-export async function initializeWasm(path: string) {
-       const source = fs.readFileSync(path);
-       imports.env["js_invoke_function"] = js_invoke;
-       const { instance: wasmInstance } = await WebAssembly.instantiate(source, imports);"""
-        else:
-            self.bindings_header += """
-/* @internal */
-export async function initializeWasm(uri: string) {
-       const stream = fetch(uri);
-       imports.env["js_invoke_function"] = js_invoke;
-       const { instance: wasmInstance } = await WebAssembly.instantiateStreaming(stream, imports);"""
+async function finishInitializeWasm(wasmInstance: WebAssembly.Instance) {
+       if (typeof crypto === "undefined") {
+               var crypto_import = (await import('crypto')).webcrypto;
+               getRandomValues = crypto_import.getRandomValues.bind(crypto_import);
+       } else {
+               getRandomValues = crypto.getRandomValues.bind(crypto);
+       }
 
-        self.bindings_header += """
        wasm = wasmInstance.exports;
        if (!wasm.test_bigint_pass_deadbeef0badf00d(BigInt("0xdeadbeef0badf00d"))) {
                throw new Error(\"Currently need BigInt-as-u64 support, try ----experimental-wasm-bigint");
        }
 
        if (decodeString(wasm.TS_get_lib_version_string()) !== version.get_ldk_java_bindings_version())
-               throw new Error(\"Compiled LDK library and LDK class failes do not match\");
+               throw new Error(\"Compiled LDK library and LDK class files do not match\");
        // Fetching the LDK versions from C also checks that the header and binaries match
-       if (wasm.TS_get_ldk_c_bindings_version() == 0)
+       const c_bindings_ver: number = wasm.TS_get_ldk_c_bindings_version();
+       const ldk_ver: number = wasm.TS_get_ldk_version();
+       if (c_bindings_ver == 0)
                throw new Error(\"LDK version did not match the header we built against\");
-       if (wasm.TS_get_ldk_version() == 0)
+       if (ldk_ver == 0)
                throw new Error(\"LDK C bindings version did not match the header we built against\");
-       const c_bindings_version: string = decodeString(wasm.TS_get_ldk_c_bindings_version());
-       const ldk_version: string = decodeString(wasm.TS_get_ldk_version());
+       const c_bindings_version: string = decodeString(c_bindings_ver)
+       const ldk_version: string = decodeString(ldk_ver);
        console.log(\"Loaded LDK-Java Bindings with LDK \" + ldk_version + \" and LDK-C-Bindings \" + c_bindings_version);
 
        isWasmInitialized = true;
-};
+}
+
+const fn_list = ["uuuuuu", "buuuuu", "bbuuuu", "bbbuuu", "bbbbuu",
+       "bbbbbb", "ubuubu", "ubuuuu", "ubbuuu", "uubuuu", "uububu"];
+
+/* @internal */
+export async function initializeWasmFromUint8Array(wasmBinary: Uint8Array) {
+       for (const fn of fn_list) { imports.env["js_invoke_function_" + fn] = js_invoke; }
+       const { instance: wasmInstance } = await WebAssembly.instantiate(wasmBinary, imports);
+       await finishInitializeWasm(wasmInstance);
+}
 
+/* @internal */
+export async function initializeWasmFetch(uri: string) {
+       for (const fn of fn_list) { imports.env["js_invoke_function_" + fn] = js_invoke; }
+       const stream = fetch(uri);
+       const { instance: wasmInstance } = await WebAssembly.instantiateStreaming(stream, imports);
+       await finishInitializeWasm(wasmInstance);
+}"""
+
+        self.bindings_header += """
 // WASM CODEC
 
-const nextMultipleOfFour = (value: number) => {
-       return Math.ceil(value / 4) * 4;
+/* @internal */
+export function uint5ArrToBytes(inputArray: Array<UInt5>): Uint8Array {
+       const arr = new Uint8Array(inputArray.length);
+       for (var i = 0; i < inputArray.length; i++) {
+               arr[i] = inputArray[i].getVal();
+       }
+       return arr;
 }
 
+/* @internal */
+export function WitnessVersionArrToBytes(inputArray: Array<WitnessVersion>): Uint8Array {
+       const arr = new Uint8Array(inputArray.length);
+       for (var i = 0; i < inputArray.length; i++) {
+               arr[i] = inputArray[i].getVal();
+       }
+       return arr;
+}
+
+
+
 /* @internal */
 export function encodeUint8Array (inputArray: Uint8Array): number {
-       const cArrayPointer = wasm.TS_malloc(inputArray.length + 4);
-       const arrayLengthView = new Uint32Array(wasm.memory.buffer, cArrayPointer, 1);
-       arrayLengthView[0] = inputArray.length;
-       const arrayMemoryView = new Uint8Array(wasm.memory.buffer, cArrayPointer + 4, inputArray.length);
+       const cArrayPointer = wasm.TS_malloc(inputArray.length + 8);
+       const arrayLengthView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
+       arrayLengthView[0] = BigInt(inputArray.length);
+       const arrayMemoryView = new Uint8Array(wasm.memory.buffer, cArrayPointer + 8, inputArray.length);
        arrayMemoryView.set(inputArray);
        return cArrayPointer;
 }
 /* @internal */
 export function encodeUint32Array (inputArray: Uint32Array|Array<number>): number {
-       const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 4);
-       const arrayMemoryView = new Uint32Array(wasm.memory.buffer, cArrayPointer, inputArray.length);
-       arrayMemoryView.set(inputArray, 1);
-       arrayMemoryView[0] = inputArray.length;
+       const cArrayPointer = wasm.TS_malloc((inputArray.length + 2) * 4);
+       const arrayLengthView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
+       arrayLengthView[0] = BigInt(inputArray.length);
+       const arrayMemoryView = new Uint32Array(wasm.memory.buffer, cArrayPointer + 8, inputArray.length);
+       arrayMemoryView.set(inputArray);
        return cArrayPointer;
 }
 /* @internal */
 export function encodeUint64Array (inputArray: BigUint64Array|Array<bigint>): number {
-       const cArrayPointer = wasm.TS_malloc(inputArray.length * 8 + 1);
-       const arrayLengthView = new Uint32Array(wasm.memory.buffer, cArrayPointer, 1);
-       arrayLengthView[0] = inputArray.length;
-       const arrayMemoryView = new BigUint64Array(wasm.memory.buffer, cArrayPointer + 4, inputArray.length);
-       arrayMemoryView.set(inputArray);
+       const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 8);
+       const arrayMemoryView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
+       arrayMemoryView.set(inputArray, 1);
+       arrayMemoryView[0] = BigInt(inputArray.length);
        return cArrayPointer;
 }
 
 /* @internal */
 export function check_arr_len(arr: Uint8Array, len: number): Uint8Array {
-       if (arr.length != len) { throw new Error("Expected array of length " + len + "got " + arr.length); }
+       if (arr.length != len) { throw new Error("Expected array of length " + len + " got " + arr.length); }
        return arr;
 }
 
 /* @internal */
 export function getArrayLength(arrayPointer: number): number {
-       const arraySizeViewer = new Uint32Array(wasm.memory.buffer, arrayPointer, 1);
-       return arraySizeViewer[0];
+       const arraySizeViewer = new BigUint64Array(wasm.memory.buffer, arrayPointer, 1);
+       const len = arraySizeViewer[0];
+       if (len >= (2n ** 32n)) throw new Error("Bogus Array Size");
+       return Number(len % (2n ** 32n));
 }
 /* @internal */
 export function decodeUint8Array (arrayPointer: number, free = true): Uint8Array {
        const arraySize = getArrayLength(arrayPointer);
-       const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 4, arraySize);
+       const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 8, arraySize);
        // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
        // will free the underlying memory when it becomes unreachable instead of copying here.
        // Note that doing so may have edge-case interactions with memory resizing (invalidating the buffer).
@@ -195,7 +223,7 @@ const decodeUint32Array = (arrayPointer: number, free = true) => {
        const arraySize = getArrayLength(arrayPointer);
        const actualArrayViewer = new Uint32Array(
                wasm.memory.buffer, // value
-               arrayPointer + 4, // offset (ignoring length bytes)
+               arrayPointer + 8, // offset (ignoring length bytes)
                arraySize // uint32 count
        );
        // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
@@ -206,13 +234,45 @@ const decodeUint32Array = (arrayPointer: number, free = true) => {
        }
        return actualArray;
 }
+/* @internal */
+export function decodeUint64Array (arrayPointer: number, free = true): bigint[] {
+       const arraySize = getArrayLength(arrayPointer);
+       const actualArrayViewer = new BigUint64Array(
+               wasm.memory.buffer, // value
+               arrayPointer + 8, // offset (ignoring length bytes)
+               arraySize // uint32 count
+       );
+       // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
+       // will free the underlying memory when it becomes unreachable instead of copying here.
+       const actualArray = new Array(arraySize);
+       for (var i = 0; i < arraySize; i++) actualArray[i] = actualArrayViewer[i];
+       if (free) {
+               wasm.TS_free(arrayPointer);
+       }
+       return actualArray;
+}
+
+export function freeWasmMemory(pointer: number) { wasm.TS_free(pointer); }
+
+/* @internal */
+export function getU64ArrayElem(arrayPointer: number, idx: number): bigint {
+       const actualArrayViewer = new BigUint64Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
+       return actualArrayViewer[idx];
+}
 
 /* @internal */
 export function getU32ArrayElem(arrayPointer: number, idx: number): number {
-       const actualArrayViewer = new Uint32Array(wasm.memory.buffer, arrayPointer + 4, idx + 1);
+       const actualArrayViewer = new Uint32Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
        return actualArrayViewer[idx];
 }
 
+/* @internal */
+export function getU8ArrayElem(arrayPointer: number, idx: number): number {
+       const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
+       return actualArrayViewer[idx];
+}
+
+
 /* @internal */
 export function encodeString(str: string): number {
        const charArray = new TextEncoder().encode(str);
@@ -222,7 +282,7 @@ export function encodeString(str: string): number {
 /* @internal */
 export function decodeString(stringPointer: number, free = true): string {
        const arraySize = getArrayLength(stringPointer);
-       const memoryView = new Uint8Array(wasm.memory.buffer, stringPointer + 4, arraySize);
+       const memoryView = new Uint8Array(wasm.memory.buffer, stringPointer + 8, arraySize);
        const result = new TextDecoder("utf-8").decode(memoryView);
 
        if (free) {
@@ -248,10 +308,16 @@ export function debugPrintRemainingAllocs() {
             self.bindings_header += "/* @internal */ export function debugPrintRemainingAllocs() { }\n"
 
         with open(outdir + "/index.mts", 'a') as index:
-            index.write("""import { initializeWasm as bindingsInit } from './bindings.mjs';
-export function initializeWasm(path: string) {
-       bindingsInit(path);
+            index.write("""import { initializeWasmFetch, initializeWasmFromUint8Array } from './bindings.mjs';
+/** Initializes the WASM backend by calling `fetch()` on the given URI - Browser only */
+export async function initializeWasmWebFetch(uri: string) {
+       await initializeWasmFetch(uri);
+}
+/** Initializes the WASM backend given a Uint8Array of the .wasm binary file - Browser or Node.JS */
+export async function initializeWasmFromBinary(bin: Uint8Array) {
+       await initializeWasmFromUint8Array(bin);
 }
+
 """)
 
         self.bindings_version_file = """export function get_ldk_java_bindings_version(): String {
@@ -263,19 +329,19 @@ export function initializeWasm(path: string) {
         self.common_base = """
 function freer(f: () => void) { f() }
 const finalizer = new FinalizationRegistry(freer);
-function get_freeer(ptr: number, free_fn: (ptr: number) => void) {
+function get_freeer(ptr: bigint, free_fn: (ptr: bigint) => void) {
        return () => {
                free_fn(ptr);
        }
 }
 
-export default class CommonBase {
-       protected ptr: number;
+export class CommonBase {
+       protected ptr: bigint;
        protected ptrs_to: object[] = [];
-       protected constructor(ptr: number, free_fn: (ptr: number) => void) {
+       protected constructor(ptr: bigint, free_fn: (ptr: bigint) => void) {
                this.ptr = ptr;
-               if (Number.isFinite(ptr) && ptr != 0){
-                       finalizer.register(this, get_freeer(ptr, free_fn));
+               if (ptr != 0n){
+                       finalizer.register(this, get_freeer(ptr, free_fn), this);
                }
        }
        // In Java, protected means "any subclass can access fields on any other subclass'"
@@ -288,10 +354,35 @@ export default class CommonBase {
                return o.ptr;
        }
        protected static set_null_skip_free(o: CommonBase) {
-               o.ptr = 0;
-               finalizer.unregister(o);
+               o.ptr = 0n;
+               // @ts-ignore TypeScript is wrong about the returnvalue of unregister here!
+               const did_unregister: boolean = finalizer.unregister(o);
+               if (!did_unregister)
+                       throw new Error("FinalizationRegistry unregister should always unregister unless you double-free'd");
+       }
+}
+
+export class UInt5 {
+       public constructor(private val: number) {
+               if (val > 32 || val < 0) throw new Error("UInt5 value is out of range");
+       }
+       public getVal(): number {
+               return this.val;
        }
 }
+
+export class WitnessVersion {
+       public constructor(private val: number) {
+               if (val > 16 || val < 0) throw new Error("WitnessVersion value is out of range");
+       }
+       public getVal(): number {
+               return this.val;
+       }
+}
+
+export class UnqualifiedError {
+       public constructor(val: number) {}
+}
 """
 
         self.txout_defn = """export class TxOut extends CommonBase {
@@ -301,12 +392,12 @@ export default class CommonBase {
        public value: bigint;
 
        /* @internal */
-       public constructor(_dummy: object, ptr: number) {
+       public constructor(_dummy: object, ptr: bigint) {
                super(ptr, bindings.TxOut_free);
                this.script_pubkey = bindings.decodeUint8Array(bindings.TxOut_get_script_pubkey(ptr));
                this.value = bindings.TxOut_get_value(ptr);
        }
-       public constructor_new(value: bigint, script_pubkey: Uint8Array): TxOut {
+       public static constructor_new(value: bigint, script_pubkey: Uint8Array): TxOut {
                return new TxOut(null, bindings.TxOut_new(bindings.encodeUint8Array(script_pubkey), value));
        }
 }"""
@@ -376,8 +467,9 @@ typedef struct allocation {
 static allocation* allocation_ll = NULL;
 static allocation* freed_ll = NULL;
 
-void* __real_malloc(size_t len);
-void* __real_calloc(size_t nmemb, size_t len);
+extern void* __real_malloc(size_t len);
+extern void* __real_calloc(size_t nmemb, size_t len);
+extern void* __real_aligned_alloc(size_t alignment, size_t size);
 static void new_allocation(void* res, const char* struct_name, int lineno) {
        allocation* new_alloc = __real_malloc(sizeof(allocation));
        new_alloc->ptr = res;
@@ -450,6 +542,11 @@ void* __wrap_calloc(size_t nmemb, size_t len) {
        new_allocation(res, "calloc call", 0);
        return res;
 }
+void* __wrap_aligned_alloc(size_t alignment, size_t size) {
+       void* res = __real_aligned_alloc(alignment, size);
+       new_allocation(res, "aligned_alloc call", 0);
+       return res;
+}
 void __wrap_free(void* ptr) {
        if (ptr == NULL) return;
        alloc_freed(ptr, 0);
@@ -491,17 +588,18 @@ _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 
 #define DECL_ARR_TYPE(ty, name) \\
        struct name##array { \\
-               uint32_t arr_len; \\
+               uint64_t arr_len; /* uint32_t would suffice but we want to align uint64_ts as well */ \\
                ty elems[]; \\
        }; \\
        typedef struct name##array * name##Array; \\
        static inline name##Array init_##name##Array(size_t arr_len, int lineno) { \\
-               name##Array arr = (name##Array)do_MALLOC(arr_len * sizeof(ty) + sizeof(uint32_t), #name" array init", lineno); \\
+               name##Array arr = (name##Array)do_MALLOC(arr_len * sizeof(ty) + sizeof(uint64_t), #name" array init", lineno); \\
                arr->arr_len = arr_len; \\
                return arr; \\
        }
 
 DECL_ARR_TYPE(int64_t, int64_t);
+DECL_ARR_TYPE(uint64_t, uint64_t);
 DECL_ARR_TYPE(int8_t, int8_t);
 DECL_ARR_TYPE(uint32_t, uint32_t);
 DECL_ARR_TYPE(void*, ptr);
@@ -552,7 +650,7 @@ jstring __attribute__((export_name("TS_get_ldk_version"))) get_ldk_version() {
 }"""
 
         self.hu_struct_file_prefix = """
-import CommonBase from './CommonBase.mjs';
+import { CommonBase, UInt5, WitnessVersion, UnqualifiedError } from './CommonBase.mjs';
 import * as bindings from '../bindings.mjs'
 
 """
@@ -560,8 +658,11 @@ import * as bindings from '../bindings.mjs'
         self.util_fn_sfx = "}"
         self.c_fn_ty_pfx = ""
         self.file_ext = ".mts"
-        self.ptr_c_ty = "uint32_t"
-        self.ptr_native_ty = "number"
+        self.ptr_c_ty = "uint64_t"
+        self.ptr_native_ty = "bigint"
+        self.usize_c_ty = "uint32_t"
+        self.usize_native_ty = "number"
+        self.native_zero_ptr = "0n"
         self.result_c_ty = "uint32_t"
         self.ptr_arr = "ptrArray"
         self.is_arr_some_check = ("", " != 0")
@@ -571,7 +672,7 @@ import * as bindings from '../bindings.mjs'
         return None
     def create_native_arr_call(self, arr_len, ty_info):
         if ty_info.c_ty == "ptrArray":
-            assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
+            assert ty_info.rust_obj == "LDKCVec_u5Z" or (ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array"))
         return "init_" + ty_info.c_ty + "(" + arr_len + ", __LINE__)"
     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
         if ty_info.c_ty == "int8_tArray":
@@ -581,28 +682,30 @@ import * as bindings from '../bindings.mjs'
     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
         if ty_info.c_ty == "int8_tArray":
             if copy:
-                return "memcpy(" + dest_name + ", " + arr_name + "->elems, " + arr_len + ")"
+                return "memcpy(" + dest_name + ", " + arr_name + "->elems, " + arr_len + "); FREE(" + arr_name + ")"
+        assert not copy
         if ty_info.c_ty == "ptrArray":
             return "(void*) " + arr_name + "->elems"
         else:
-            assert not copy
             return arr_name + "->elems"
     def get_native_arr_elem(self, arr_name, idxc, ty_info):
         assert False # Only called if above is None
     def get_native_arr_ptr_call(self, ty_info):
         if ty_info.subty is not None:
-            return "(" + ty_info.subty.c_ty + "*)(((uint8_t*)", ") + 4)"
-        return "(" + ty_info.c_ty + "*)(((uint8_t*)", ") + 4)"
+            return "(" + ty_info.subty.c_ty + "*)(((uint8_t*)", ") + 8)"
+        return "(" + ty_info.c_ty + "*)(((uint8_t*)", ") + 8)"
     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
         return None
     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
         if ty_info.c_ty == "int8_tArray":
-            return None
+            return "FREE(" + arr_name + ");"
         else:
-            return None
+            return "FREE(" + arr_name + ")"
 
     def map_hu_array_elems(self, arr_name, conv_name, arr_ty, elem_ty):
-        assert elem_ty.c_ty == "uint32_t" or elem_ty.c_ty.endswith("Array")
+        if elem_ty.rust_obj == "LDKu5":
+            return arr_name + " != null ? bindings.uint5ArrToBytes(" + arr_name + ") : null"
+        assert elem_ty.c_ty == "uint64_t" or elem_ty.c_ty.endswith("Array")
         return arr_name + " != null ? " + arr_name + ".map(" + conv_name + " => " + elem_ty.from_hu_conv[0] + ") : null"
 
     def str_ref_to_native_call(self, var_name, str_len):
@@ -623,12 +726,18 @@ import * as bindings from '../bindings.mjs'
     def get_java_arr_len(self, arr_name):
         return "bindings.getArrayLength(" + arr_name + ")"
     def get_java_arr_elem(self, elem_ty, arr_name, idx):
-        if elem_ty.c_ty == "uint32_t" or elem_ty.c_ty == "uintptr_t" or elem_ty.c_ty.endswith("Array"):
+        if elem_ty.c_ty.endswith("Array") or elem_ty.c_ty == "uintptr_t":
             return "bindings.getU32ArrayElem(" + arr_name + ", " + idx + ")"
+        elif elem_ty.c_ty == "uint64_t":
+            return "bindings.getU64ArrayElem(" + arr_name + ", " + idx + ")"
+        elif elem_ty.rust_obj == "LDKu5":
+            return "bindings.getU8ArrayElem(" + arr_name + ", " + idx + ")"
         else:
             assert False
     def constr_hu_array(self, ty_info, arr_len):
         return "new Array(" + arr_len + ").fill(null)"
+    def cleanup_converted_native_array(self, ty_info, arr_name):
+        return "bindings.freeWasmMemory(" + arr_name + ")"
 
     def primitive_arr_from_hu(self, mapped_ty, fixed_len, arr_name):
         inner = arr_name
@@ -641,15 +750,19 @@ import * as bindings from '../bindings.mjs'
             return ("bindings.encodeUint8Array(" + inner + ")", "")
         elif mapped_ty.c_ty == "uint32_t":
             return ("bindings.encodeUint32Array(" + inner + ")", "")
-        elif mapped_ty.c_ty == "int64_t":
+        elif mapped_ty.c_ty == "int64_t" or mapped_ty.c_ty == "uint64_t":
             return ("bindings.encodeUint64Array(" + inner + ")", "")
         else:
             print(mapped_ty.c_ty)
             assert False
 
     def primitive_arr_to_hu(self, mapped_ty, fixed_len, arr_name, conv_name):
-        assert mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t"
-        return "const " + conv_name + ": Uint8Array = bindings.decodeUint8Array(" + arr_name + ");"
+        if mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t":
+            return "const " + conv_name + ": Uint8Array = bindings.decodeUint8Array(" + arr_name + ");"
+        elif mapped_ty.c_ty == "uint64_t" or mapped_ty.c_ty == "int64_t":
+            return "const " + conv_name + ": bigint[] = bindings.decodeUint64Array(" + arr_name + ");"
+        else:
+            assert False
 
     def var_decl_statement(self, ty_string, var_name, statement):
         return "const " + var_name + ": " + ty_string + " = " + statement
@@ -676,6 +789,9 @@ import * as bindings from '../bindings.mjs'
         with open(self.outdir + "/imports.mts.part", 'a') as imports:
             imports.write(f"import {{ {', '.join(struct_names)} }} from '../{folder}/{struct_names[0]}.mjs';\n")
 
+    def fully_qualified_hu_ty_path(self, ty):
+        return ty.java_hu_ty
+
     def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
         out_c = "static inline LDK" + struct_name + " LDK" + struct_name + "_from_js(int32_t ord) {\n"
         out_c = out_c + "\tswitch (ord) {\n"
@@ -704,8 +820,12 @@ import * as bindings from '../bindings.mjs'
         out_c = out_c + "\t}\n"
         out_c = out_c + "}\n"
 
+        # Note that this is *not* marked /* @internal */ as we re-expose it directly in enums/
+        enum_comment_formatted = enum_doc_comment.replace("\n", "\n * ")
         out_typescript = f"""
-/* @internal */
+/**
+ * {enum_comment_formatted}
+ */
 export enum {struct_name} {{
        {out_typescript_enum_fields}
 }}
@@ -762,6 +882,7 @@ export enum {struct_name} {{
         for fn_line in field_function_lines:
             java_method_descriptor = ""
             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
+                out_java_interface += "\t/**" + fn_line.docs.replace("\n", "\n\t * ") + "\n\t */\n"
                 out_java_interface += "\t" + fn_line.fn_name + "("
                 out_interface_implementation_overrides += f"\t\t\t{fn_line.fn_name} ("
 
@@ -810,9 +931,11 @@ export enum {struct_name} {{
                         out_interface_implementation_overrides += "\t\t\t\treturn ret;\n"
                 out_interface_implementation_overrides += f"\t\t\t}},\n"
 
+        formatted_trait_docs = trait_doc_comment.replace("\n", "\n * ")
         out_typescript_human = f"""
 {self.hu_struct_file_prefix}
 
+/** An implementation of {struct_name.replace("LDK","")} */
 export interface {struct_name.replace("LDK", "")}Interface {{
 {out_java_interface}}}
 
@@ -820,26 +943,31 @@ class {struct_name}Holder {{
        held: {struct_name.replace("LDK", "")};
 }}
 
+/**
+ * {formatted_trait_docs}
+ */
 export class {struct_name.replace("LDK","")} extends CommonBase {{
        /* @internal */
        public bindings_instance?: bindings.{struct_name};
 
        /* @internal */
-       constructor(_dummy: object, ptr: number) {{
+       constructor(_dummy: object, ptr: bigint) {{
                super(ptr, bindings.{struct_name.replace("LDK","")}_free);
                this.bindings_instance = null;
        }}
 
-       static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
+       /** Creates a new instance of {struct_name.replace("LDK","")} from a given implementation */
+       public static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
                const impl_holder: {struct_name}Holder = new {struct_name}Holder();
                let structImplementation = {{
 {out_interface_implementation_overrides}               }} as bindings.{struct_name};
-{super_constructor_statements}         const ptr: number = bindings.{struct_name}_new(structImplementation{bindings_instantiator});
+{super_constructor_statements}         const ptr: bigint = bindings.{struct_name}_new(structImplementation{bindings_instantiator});
 
                impl_holder.held = new {struct_name.replace("LDK", "")}(null, ptr);
                impl_holder.held.bindings_instance = structImplementation;
 {pointer_to_adder}             return impl_holder.held;
        }}
+
 """
         self.obj_defined([struct_name.replace("LDK", ""), struct_name.replace("LDK", "") + "Interface"], "structs")
 
@@ -865,7 +993,7 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
             else:
                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 
-        out_typescript_bindings += f"""): number {{
+        out_typescript_bindings += f"""): bigint {{
        if(!isWasmInitialized) {{
                throw new Error("initializeWasm() must be awaited first!");
        }}
@@ -920,26 +1048,41 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
                         out_c = out_c + arg_info.arg_name
                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 
+                fn_suffix = ""
+                assert len(fn_line.args_ty) < 6
+                for arg_info in fn_line.args_ty:
+                    if arg_info.c_ty == "uint64_t" or arg_info.c_ty == "int64_t":
+                        fn_suffix += "b"
+                    else:
+                        fn_suffix += "u"
+                for i in range(0, 6 - len(fn_line.args_ty)):
+                    fn_suffix += "u"
                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
                     out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (" + fn_line.ret_ty_info.c_ty + ")"
-                    out_c += "js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
+                    out_c += "js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
                 elif fn_line.ret_ty_info.java_ty == "void":
-                    out_c = out_c + "\tjs_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
+                    out_c = out_c + "\tjs_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
                 elif fn_line.ret_ty_info.java_hu_ty == "string":
-                    out_c = out_c + "\tjstring ret = (jstring)js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
+                    out_c += "\tjstring ret = (jstring)js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
                 elif not fn_line.ret_ty_info.passed_as_ptr:
-                    out_c = out_c + "\treturn js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
+                    out_c += "\treturn js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
                 else:
-                    out_c = out_c + "\tuint32_t ret = js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
+                    out_c += "\tuint32_t ret = js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
 
                 self.function_ptrs[self.function_ptr_counter] = (struct_name, fn_line.fn_name)
                 self.function_ptr_counter += 1
 
                 for idx, arg_info in enumerate(fn_line.args_ty):
                     if arg_info.ret_conv is not None:
-                        out_c = out_c + ", (uint32_t)" + arg_info.ret_conv_name
+                        if arg_info.c_ty.endswith("Array"):
+                            out_c += ", (uint32_t)" + arg_info.ret_conv_name
+                        else:
+                            out_c += ", " + arg_info.ret_conv_name
                     else:
-                        out_c = out_c + ", (uint32_t)" + arg_info.arg_name
+                        assert False # TODO: Would we need some conversion here?
+                        out_c += ", (uint32_t)" + arg_info.arg_name
+                for i in range(0, 6 - len(fn_line.args_ty)):
+                    out_c += ", 0"
                 out_c = out_c + ");\n"
                 if fn_line.ret_ty_info.arg_conv is not None:
                     out_c = out_c + "\t" + fn_line.ret_ty_info.arg_conv.replace("\n", "\n\t") + "\n\treturn " + fn_line.ret_ty_info.arg_conv_name + ";\n"
@@ -1007,7 +1150,7 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
         out_c = out_c + "\treturn ret;\n"
         out_c = out_c + "}\n"
 
-        out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "JSValue o"
+        out_c = out_c + self.c_fn_ty_pfx + "uint64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "JSValue o"
         for var in flattened_field_var_conversions:
             if isinstance(var, ConvInfo):
                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
@@ -1022,13 +1165,16 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
             else:
                 out_c = out_c + ", " + var[1]
         out_c = out_c + ");\n"
-        out_c = out_c + "\treturn (long)res_ptr;\n"
+        out_c = out_c + "\treturn tag_ptr(res_ptr, true);\n"
         out_c = out_c + "}\n"
 
         return (out_typescript_bindings, out_typescript_human, out_c)
 
     def trait_struct_inc_refcnt(self, ty_info):
-        return ""
+        base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
+        base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
+        base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_cloned(&" + ty_info.var_name + "_conv);\n}"
+        return base_conv
 
     def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
         bindings_type = struct_name.replace("LDK", "")
@@ -1040,14 +1186,14 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
 
         out_java_enum += (self.hu_struct_file_prefix)
 
-        java_hu_class = ""
+        java_hu_class = "/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
         java_hu_class += "export class " + java_hu_type + " extends CommonBase {\n"
-        java_hu_class += "\tprotected constructor(_dummy: object, ptr: number) { super(ptr, bindings." + bindings_type + "_free); }\n"
+        java_hu_class += "\tprotected constructor(_dummy: object, ptr: bigint) { super(ptr, bindings." + bindings_type + "_free); }\n"
         java_hu_class += "\t/* @internal */\n"
-        java_hu_class += f"\tpublic static constr_from_ptr(ptr: number): {java_hu_type} {{\n"
+        java_hu_class += f"\tpublic static constr_from_ptr(ptr: bigint): {java_hu_type} {{\n"
         java_hu_class += f"\t\tconst raw_ty: number = bindings." + struct_name + "_ty_from_ptr(ptr);\n"
         out_c += self.c_fn_ty_pfx + "uint32_t" + self.c_fn_name_define_pfx(struct_name + "_ty_from_ptr", True) + self.ptr_c_ty + " ptr) {\n"
-        out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n"
+        out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)untag_ptr(ptr);\n"
         out_c += "\tswitch(obj->tag) {\n"
         java_hu_class += "\t\tswitch (raw_ty) {\n"
         java_hu_subclasses = ""
@@ -1056,13 +1202,16 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
         out_java += "\tprotected constructor() {}\n"
         var_idx = 0
         for var in variant_list:
-            java_hu_subclasses = java_hu_subclasses + "export class " + java_hu_type + "_" + var.var_name + " extends " + java_hu_type + " {\n"
+            java_hu_subclasses += "/** A " + java_hu_type + " of type " + var.var_name + " */\n"
+            java_hu_subclasses += "export class " + java_hu_type + "_" + var.var_name + " extends " + java_hu_type + " {\n"
             java_hu_class += f"\t\t\tcase {var_idx}: "
             java_hu_class += "return new " + java_hu_type + "_" + var.var_name + "(ptr);\n"
             out_c += f"\t\tcase {struct_name}_{var.var_name}: return {var_idx};\n"
             hu_conv_body = ""
             for idx, (field_ty, field_docs) in enumerate(var.fields):
-                java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
+                if field_docs is not None:
+                    java_hu_subclasses += "\t/**\n\t * " + field_docs.replace("\n", "\n\t * ") + "\n\t */\n"
+                java_hu_subclasses += "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
                 if field_ty.to_hu_conv is not None:
                     hu_conv_body += f"\t\tconst {field_ty.arg_name}: {field_ty.java_ty} = bindings.{struct_name}_{var.var_name}_get_{field_ty.arg_name}(ptr);\n"
                     hu_conv_body += f"\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
@@ -1070,13 +1219,13 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
                 else:
                     hu_conv_body += f"\t\tthis.{field_ty.arg_name} = bindings.{struct_name}_{var.var_name}_get_{field_ty.arg_name}(ptr);\n"
             java_hu_subclasses += "\t/* @internal */\n"
-            java_hu_subclasses += "\tpublic constructor(ptr: number) {\n\t\tsuper(null, ptr);\n"
+            java_hu_subclasses += "\tpublic constructor(ptr: bigint) {\n\t\tsuper(null, ptr);\n"
             java_hu_subclasses = java_hu_subclasses + hu_conv_body
             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
             var_idx += 1
         out_java += "}\n"
         java_hu_class += "\t\t\tdefault:\n\t\t\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t\t}\n\t}\n\n"
-        out_java += self.fn_call_body(struct_name + "_ty_from_ptr", "uint32_t", "number", "ptr: number", "ptr")
+        out_java += self.fn_call_body(struct_name + "_ty_from_ptr", "uint32_t", "number", "ptr: bigint", "ptr")
         out_c += ("\t\tdefault: abort();\n")
         out_c += ("\t}\n}\n")
 
@@ -1084,7 +1233,7 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
             for idx, (field_map, _) in enumerate(var.fields):
                 fn_name = f"{struct_name}_{var.var_name}_get_{field_map.arg_name}"
                 out_c += self.c_fn_ty_pfx + field_map.c_ty + self.c_fn_name_define_pfx(fn_name, True) + self.ptr_c_ty + " ptr) {\n"
-                out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n"
+                out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)untag_ptr(ptr);\n"
                 out_c += f"\tassert(obj->tag == {struct_name}_{var.var_name});\n"
                 if field_map.ret_conv is not None:
                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
@@ -1100,7 +1249,7 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
                     else:
                         out_c += "\treturn " + "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name + ";\n"
                 out_c += "}\n"
-                out_java += self.fn_call_body(fn_name, field_map.c_ty, field_map.java_ty, "ptr: number", "ptr")
+                out_java += self.fn_call_body(fn_name, field_map.c_ty, field_map.java_ty, "ptr: bigint", "ptr")
         out_java_enum += java_hu_class
         self.struct_file_suffixes[java_hu_type] = java_hu_subclasses
         self.obj_defined([java_hu_type], "structs")
@@ -1112,14 +1261,28 @@ export class {struct_name.replace("LDK","")} extends CommonBase {{
 
         hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple").replace("LDK", "")
         out_opaque_struct_human = f"{self.hu_struct_file_prefix}"
-        if struct_name.startswith("LDKLocked"):
-            out_opaque_struct_human += "/** XXX: DO NOT USE THIS - it remains locked until the GC runs (if that ever happens */"
+        constructor_body = "super(ptr, bindings." + struct_name.replace("LDK","") + "_free);"
+        extra_docs = ""
+        extra_body = ""
+        if struct_name.startswith("LDKLocked") or struct_name.startswith("LDKReadOnly"):
+            extra_docs = "\n * This type represents a lock and MUST BE MANUALLY FREE'd!"
+            constructor_body = 'super(ptr, () => { throw new Error("Locks must be manually freed with free()"); });'
+            extra_body = f"""
+       /** Releases this lock */
+       public free() {{
+               bindings.{struct_name.replace("LDK","")}_free(this.ptr);
+               CommonBase.set_null_skip_free(this);
+       }}"""
+        formatted_doc_comment = struct_doc_comment.replace("\n", "\n * ")
         out_opaque_struct_human += f"""
+/**{extra_docs}
+ * {formatted_doc_comment}
+ */
 export class {hu_name} extends CommonBase {implementations}{{
        /* @internal */
-       public constructor(_dummy: object, ptr: number) {{
-               super(ptr, bindings.{struct_name.replace("LDK","")}_free);
-       }}
+       public constructor(_dummy: object, ptr: bigint) {{
+               {constructor_body}
+       }}{extra_body}
 
 """
         self.obj_defined([hu_name], "structs")
@@ -1136,7 +1299,7 @@ export class {hu_name} extends CommonBase {implementations}{{
             suffixes += "\tpublic res: " + res_map.java_hu_ty + ";\n"
         suffixes += f"""
        /* @internal */
-       public constructor(_dummy: object, ptr: number) {{
+       public constructor(_dummy: object, ptr: bigint) {{
                super(_dummy, ptr);
 """
         if res_map.java_hu_ty == "void":
@@ -1154,7 +1317,7 @@ export class {hu_name} extends CommonBase {implementations}{{
             suffixes += "\tpublic err: " + err_map.java_hu_ty + ";\n"
         suffixes += f"""
        /* @internal */
-       public constructor(_dummy: object, ptr: number) {{
+       public constructor(_dummy: object, ptr: bigint) {{
                super(_dummy, ptr);
 """
         if err_map.java_hu_ty == "void":
@@ -1173,11 +1336,11 @@ export class {hu_name} extends CommonBase {implementations}{{
         return f"""{self.hu_struct_file_prefix}
 
 export class {human_ty} extends CommonBase {{
-       protected constructor(_dummy: object, ptr: number) {{
+       protected constructor(_dummy: object, ptr: bigint) {{
                super(ptr, bindings.{struct_name.replace("LDK","")}_free);
        }}
        /* @internal */
-       public static constr_from_ptr(ptr: number): {human_ty} {{
+       public static constr_from_ptr(ptr: bigint): {human_ty} {{
                if (bindings.{struct_name.replace("LDK", "")}_is_ok(ptr)) {{
                        return new {human_ty}_OK(null, ptr);
                }} else {{
@@ -1229,6 +1392,9 @@ export function {method_name}({method_argument_string}): {return_java_ty} {{
         out_java = self.fn_call_body(method_name, return_type_info.c_ty, return_type_info.java_ty, method_argument_string, native_call_argument_string)
 
         out_java_struct = ""
+        if doc_comment is not None:
+            out_java_struct = "\t/**\n\t * " + doc_comment.replace("\n", "\n\t * ") + "\n\t */\n"
+
         if not args_known:
             out_java_struct += ("\t// Skipped " + method_name + "\n")
         else:
@@ -1356,7 +1522,7 @@ export function {method_name}({method_argument_string}): {return_java_ty} {{
         with open(self.outdir + "/bindings.mts", "a") as bindings:
             bindings.write("""
 
-js_invoke = function(obj_ptr: number, fn_id: number, arg1: number, arg2: number, arg3: number, arg4: number, arg5: number, arg6: number, arg7: number, arg8: number, arg9: number, arg10: number) {
+js_invoke = function(obj_ptr: number, fn_id: number, arg1: bigint|number, arg2: bigint|number, arg3: bigint|number, arg4: bigint|number, arg5: bigint|number, arg6: bigint|number, arg7: bigint|number, arg8: bigint|number, arg9: bigint|number, arg10: bigint|number) {
        const weak: WeakRef<object> = js_objs[obj_ptr];
        if (weak == null || weak == undefined) {
                console.error("Got function call on unknown/free'd JS object!");
@@ -1381,5 +1547,7 @@ js_invoke = function(obj_ptr: number, fn_id: number, arg1: number, arg2: number,
                console.error("Got function call on incorrect JS object!");
                throw new Error("Got function call on incorrect JS object!");
        }
-       return fn.value.bind(obj)(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10);
+       const ret = fn.value.bind(obj)(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10);
+       if (ret === undefined || ret === null) return BigInt(0);
+       return BigInt(ret);
 }""")