_ Git - ldk-java/blob - typescript_strings.py

   1 from bindingstypes import ConvInfo
   2 from enum import Enum
   3
   4 def first_to_lower(string: str) -> str:
   5     first = string[0]
   6     return first.lower() + string[1:]
   7
   8
   9 class Target(Enum):
  10     NODEJS = 1,
  11     BROWSER = 2
  12
  13 class Consts:
  14     def __init__(self, DEBUG: bool, target: Target, outdir: str, **kwargs):
  15         self.outdir = outdir
  16         self.struct_file_suffixes = {}
  17         self.function_ptr_counter = 0
  18         self.function_ptrs = {}
  19         self.c_type_map = dict(
  20             uint8_t = ['number', 'number', 'Uint8Array'],
  21             uint16_t = ['number', 'number', 'Uint16Array'],
  22             uint32_t = ['number', 'number', 'Uint32Array'],
  23             uint64_t = ['bigint', 'bigint', 'BigUint64Array'],
  24         )
  25         self.java_type_map = dict(
  26             String = "number"
  27         )
  28         self.java_hu_type_map = dict(
  29             String = "string"
  30         )
  31
  32         self.to_hu_conv_templates = dict(
  33             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  34             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  35         )
  36
  37         self.bindings_header = """
  38 import * as version from './version.mjs';
  39
  40 const imports: any = {};
  41 imports.env = {};
  42
  43 var js_objs: Array<WeakRef<object>> = [];
  44 var js_invoke: Function;
  45
  46 imports.wasi_snapshot_preview1 = {
  47         "fd_write": (fd: number, iovec_array_ptr: number, iovec_array_len: number) => {
  48                 // This should generally only be used to print panic messages
  49                 console.log("FD_WRITE to " + fd + " in " + iovec_array_len + " chunks.");
  50                 const ptr_len_view = new Uint32Array(wasm.memory.buffer, iovec_array_ptr, iovec_array_len * 2);
  51                 for (var i = 0; i < iovec_array_len; i++) {
  52                         const bytes_view = new Uint8Array(wasm.memory.buffer, ptr_len_view[i*2], ptr_len_view[i*2+1]);
  53                         console.log(String.fromCharCode(...bytes_view));
  54                 }
  55                 return 0;
  56         },
  57         "fd_close": (_fd: number) => {
  58                 // This is not generally called, but may be referenced in debug builds
  59                 console.log("wasi_snapshot_preview1:fd_close");
  60                 return 58; // Not Supported
  61         },
  62         "fd_seek": (_fd: number, _offset: bigint, _whence: number, _new_offset: number) => {
  63                 // This is not generally called, but may be referenced in debug builds
  64                 console.log("wasi_snapshot_preview1:fd_seek");
  65                 return 58; // Not Supported
  66         },
  67         "random_get": (buf_ptr: number, buf_len: number) => {
  68                 const buf = new Uint8Array(wasm.memory.buffer, buf_ptr, buf_len);
  69                 crypto.getRandomValues(buf);
  70                 return 0;
  71         },
  72         "environ_sizes_get": (environ_var_count_ptr: number, environ_len_ptr: number) => {
  73                 // This is called before fd_write to format + print panic messages
  74                 console.log("wasi_snapshot_preview1:environ_sizes_get");
  75                 const out_count_view = new Uint32Array(wasm.memory.buffer, environ_var_count_ptr, 1);
  76                 out_count_view[0] = 1;
  77                 const out_len_view = new Uint32Array(wasm.memory.buffer, environ_len_ptr, 1);
  78                 out_len_view[0] = "RUST_BACKTRACE=1".length + 1; // Note that string must be NULL-terminated
  79                 return 0;
  80         },
  81         "environ_get": (environ_ptr: number, environ_buf_ptr: number) => {
  82                 // This is called before fd_write to format + print panic messages
  83                 console.log("wasi_snapshot_preview1:environ_get");
  84                 const out_ptrs = new Uint32Array(wasm.memory.buffer, environ_ptr, 2);
  85                 out_ptrs[0] = environ_buf_ptr;
  86                 out_ptrs[1] = "RUST_BACKTRACE=1".length;
  87                 const out_environ = new Uint8Array(wasm.memory.buffer, environ_buf_ptr, out_ptrs[1]);
  88                 for (var i = 0; i < out_ptrs[1]; i++) { out_environ[i] = "RUST_BACKTRACE=1".codePointAt(i); }
  89                 out_environ[out_ptrs[1]] = 0;
  90                 return 0;
  91         },
  92         "proc_exit" : () => {
  93                 console.log("wasi_snapshot_preview1:proc_exit");
  94         },
  95 };
  96
  97 var wasm: any = null;
  98 let isWasmInitialized: boolean = false;
  99 """
 100
 101         if target == Target.NODEJS:
 102             self.bindings_header += """import * as fs from 'fs';
 103 import { webcrypto as crypto } from 'crypto';
 104 /* @internal */
 105 export async function initializeWasm(path: string) {
 106         const source = fs.readFileSync(path);
 107         imports.env["js_invoke_function"] = js_invoke;
 108         const { instance: wasmInstance } = await WebAssembly.instantiate(source, imports);"""
 109         else:
 110             self.bindings_header += """
 111 /* @internal */
 112 export async function initializeWasm(uri: string) {
 113         const stream = fetch(uri);
 114         imports.env["js_invoke_function"] = js_invoke;
 115         const { instance: wasmInstance } = await WebAssembly.instantiateStreaming(stream, imports);"""
 116
 117         self.bindings_header += """
 118         wasm = wasmInstance.exports;
 119         if (!wasm.test_bigint_pass_deadbeef0badf00d(BigInt("0xdeadbeef0badf00d"))) {
 120                 throw new Error(\"Currently need BigInt-as-u64 support, try ----experimental-wasm-bigint");
 121         }
 122
 123         if (decodeString(wasm.TS_get_lib_version_string()) !== version.get_ldk_java_bindings_version())
 124                 throw new Error(\"Compiled LDK library and LDK class failes do not match\");
 125         // Fetching the LDK versions from C also checks that the header and binaries match
 126         if (wasm.TS_get_ldk_c_bindings_version() == 0)
 127                 throw new Error(\"LDK version did not match the header we built against\");
 128         if (wasm.TS_get_ldk_version() == 0)
 129                 throw new Error(\"LDK C bindings version did not match the header we built against\");
 130         const c_bindings_version: string = decodeString(wasm.TS_get_ldk_c_bindings_version());
 131         const ldk_version: string = decodeString(wasm.TS_get_ldk_version());
 132         console.log(\"Loaded LDK-Java Bindings with LDK \" + ldk_version + \" and LDK-C-Bindings \" + c_bindings_version);
 133
 134         isWasmInitialized = true;
 135 };
 136
 137 // WASM CODEC
 138
 139 const nextMultipleOfFour = (value: number) => {
 140         return Math.ceil(value / 4) * 4;
 141 }
 142
 143 /* @internal */
 144 export function encodeUint8Array (inputArray: Uint8Array): number {
 145         const cArrayPointer = wasm.TS_malloc(inputArray.length + 4);
 146         const arrayLengthView = new Uint32Array(wasm.memory.buffer, cArrayPointer, 1);
 147         arrayLengthView[0] = inputArray.length;
 148         const arrayMemoryView = new Uint8Array(wasm.memory.buffer, cArrayPointer + 4, inputArray.length);
 149         arrayMemoryView.set(inputArray);
 150         return cArrayPointer;
 151 }
 152 /* @internal */
 153 export function encodeUint32Array (inputArray: Uint32Array|Array<number>): number {
 154         const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 4);
 155         const arrayMemoryView = new Uint32Array(wasm.memory.buffer, cArrayPointer, inputArray.length);
 156         arrayMemoryView.set(inputArray, 1);
 157         arrayMemoryView[0] = inputArray.length;
 158         return cArrayPointer;
 159 }
 160 /* @internal */
 161 export function encodeUint64Array (inputArray: BigUint64Array|Array<bigint>): number {
 162         const cArrayPointer = wasm.TS_malloc(inputArray.length * 8 + 1);
 163         const arrayLengthView = new Uint32Array(wasm.memory.buffer, cArrayPointer, 1);
 164         arrayLengthView[0] = inputArray.length;
 165         const arrayMemoryView = new BigUint64Array(wasm.memory.buffer, cArrayPointer + 4, inputArray.length);
 166         arrayMemoryView.set(inputArray);
 167         return cArrayPointer;
 168 }
 169
 170 /* @internal */
 171 export function check_arr_len(arr: Uint8Array, len: number): Uint8Array {
 172         if (arr.length != len) { throw new Error("Expected array of length " + len + "got " + arr.length); }
 173         return arr;
 174 }
 175
 176 /* @internal */
 177 export function getArrayLength(arrayPointer: number): number {
 178         const arraySizeViewer = new Uint32Array(wasm.memory.buffer, arrayPointer, 1);
 179         return arraySizeViewer[0];
 180 }
 181 /* @internal */
 182 export function decodeUint8Array (arrayPointer: number, free = true): Uint8Array {
 183         const arraySize = getArrayLength(arrayPointer);
 184         const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 4, arraySize);
 185         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 186         // will free the underlying memory when it becomes unreachable instead of copying here.
 187         // Note that doing so may have edge-case interactions with memory resizing (invalidating the buffer).
 188         const actualArray = actualArrayViewer.slice(0, arraySize);
 189         if (free) {
 190                 wasm.TS_free(arrayPointer);
 191         }
 192         return actualArray;
 193 }
 194 const decodeUint32Array = (arrayPointer: number, free = true) => {
 195         const arraySize = getArrayLength(arrayPointer);
 196         const actualArrayViewer = new Uint32Array(
 197                 wasm.memory.buffer, // value
 198                 arrayPointer + 4, // offset (ignoring length bytes)
 199                 arraySize // uint32 count
 200         );
 201         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 202         // will free the underlying memory when it becomes unreachable instead of copying here.
 203         const actualArray = actualArrayViewer.slice(0, arraySize);
 204         if (free) {
 205                 wasm.TS_free(arrayPointer);
 206         }
 207         return actualArray;
 208 }
 209
 210
 211 export function freeWasmMemory(pointer: number) { wasm.TS_free(pointer); }
 212
 213 /* @internal */
 214 export function getU32ArrayElem(arrayPointer: number, idx: number): number {
 215         const actualArrayViewer = new Uint32Array(wasm.memory.buffer, arrayPointer + 4, idx + 1);
 216         return actualArrayViewer[idx];
 217 }
 218
 219 /* @internal */
 220 export function encodeString(str: string): number {
 221         const charArray = new TextEncoder().encode(str);
 222         return encodeUint8Array(charArray);
 223 }
 224
 225 /* @internal */
 226 export function decodeString(stringPointer: number, free = true): string {
 227         const arraySize = getArrayLength(stringPointer);
 228         const memoryView = new Uint8Array(wasm.memory.buffer, stringPointer + 4, arraySize);
 229         const result = new TextDecoder("utf-8").decode(memoryView);
 230
 231         if (free) {
 232                 wasm.TS_free(stringPointer);
 233         }
 234
 235         return result;
 236 }
 237 """
 238         if DEBUG:
 239             self.bindings_header += """
 240 /* @internal */
 241 export function getRemainingAllocationCount(): number {
 242         return wasm.TS_allocs_remaining();
 243 }
 244 /* @internal */
 245 export function debugPrintRemainingAllocs() {
 246         wasm.TS_print_leaks();
 247 }
 248 """
 249         else:
 250             self.bindings_header += "\n/* @internal */ export function getRemainingAllocationCount(): number { return 0; }\n"
 251             self.bindings_header += "/* @internal */ export function debugPrintRemainingAllocs() { }\n"
 252
 253         with open(outdir + "/index.mts", 'a') as index:
 254             index.write("""import { initializeWasm as bindingsInit } from './bindings.mjs';
 255 export function initializeWasm(path: string) {
 256         bindingsInit(path);
 257 }
 258 """)
 259
 260         self.bindings_version_file = """export function get_ldk_java_bindings_version(): String {
 261         return "<git_version_ldk_garbagecollected>";
 262 }"""
 263
 264         self.bindings_footer = ""
 265
 266         self.common_base = """
 267 function freer(f: () => void) { f() }
 268 const finalizer = new FinalizationRegistry(freer);
 269 function get_freeer(ptr: number, free_fn: (ptr: number) => void) {
 270         return () => {
 271                 free_fn(ptr);
 272         }
 273 }
 274
 275 export default class CommonBase {
 276         protected ptr: number;
 277         protected ptrs_to: object[] = [];
 278         protected constructor(ptr: number, free_fn: (ptr: number) => void) {
 279                 this.ptr = ptr;
 280                 if (Number.isFinite(ptr) && ptr != 0){
 281                         finalizer.register(this, get_freeer(ptr, free_fn));
 282                 }
 283         }
 284         // In Java, protected means "any subclass can access fields on any other subclass'"
 285         // In TypeScript, protected means "any subclass can access parent fields on instances of itself"
 286         // To work around this, we add accessors for other instances' protected fields here.
 287         protected static add_ref_from(holder: CommonBase, referent: object) {
 288                 holder.ptrs_to.push(referent);
 289         }
 290         protected static get_ptr_of(o: CommonBase) {
 291                 return o.ptr;
 292         }
 293         protected static set_null_skip_free(o: CommonBase) {
 294                 o.ptr = 0;
 295                 finalizer.unregister(o);
 296         }
 297 }
 298 """
 299
 300         self.txout_defn = """export class TxOut extends CommonBase {
 301         /** The script_pubkey in this output */
 302         public script_pubkey: Uint8Array;
 303         /** The value, in satoshis, of this output */
 304         public value: bigint;
 305
 306         /* @internal */
 307         public constructor(_dummy: object, ptr: number) {
 308                 super(ptr, bindings.TxOut_free);
 309                 this.script_pubkey = bindings.decodeUint8Array(bindings.TxOut_get_script_pubkey(ptr));
 310                 this.value = bindings.TxOut_get_value(ptr);
 311         }
 312         public constructor_new(value: bigint, script_pubkey: Uint8Array): TxOut {
 313                 return new TxOut(null, bindings.TxOut_new(bindings.encodeUint8Array(script_pubkey), value));
 314         }
 315 }"""
 316         self.obj_defined(["TxOut"], "structs")
 317
 318         self.c_file_pfx = """#include "js-wasm.h"
 319 #include <stdatomic.h>
 320 #include <lightning.h>
 321
 322 // These should be provided...somehow...
 323 void *memset(void *s, int c, size_t n);
 324 void *memcpy(void *dest, const void *src, size_t n);
 325 int memcmp(const void *s1, const void *s2, size_t n);
 326
 327 extern void __attribute__((noreturn)) abort(void);
 328 static inline void assert(bool expression) {
 329         if (!expression) { abort(); }
 330 }
 331
 332 uint32_t __attribute__((export_name("test_bigint_pass_deadbeef0badf00d"))) test_bigint_pass_deadbeef0badf00d(uint64_t val) {
 333         return val == 0xdeadbeef0badf00dULL;
 334 }
 335
 336 """
 337
 338         if not DEBUG:
 339             self.c_file_pfx += """
 340 void *malloc(size_t size);
 341 void free(void *ptr);
 342
 343 #define MALLOC(a, _) malloc(a)
 344 #define do_MALLOC(a, _b, _c) malloc(a)
 345 #define FREE(p) if ((unsigned long)(p) > 4096) { free(p); }
 346 #define DO_ASSERT(a) (void)(a)
 347 #define CHECK(a)
 348 #define CHECK_ACCESS(p)
 349 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v)
 350 """
 351         else:
 352             self.c_file_pfx += """
 353 extern int snprintf(char *str, size_t size, const char *format, ...);
 354 typedef int32_t ssize_t;
 355 ssize_t write(int fd, const void *buf, size_t count);
 356 #define DEBUG_PRINT(...) do { \\
 357         char debug_str[1024]; \\
 358         int s_len = snprintf(debug_str, 1023, __VA_ARGS__); \\
 359         write(2, debug_str, s_len); \\
 360 } while (0);
 361
 362 // Always run a, then assert it is true:
 363 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 364 // Assert a is true or do nothing
 365 #define CHECK(a) DO_ASSERT(a)
 366
 367 // Running a leak check across all the allocations and frees of the JDK is a mess,
 368 // so instead we implement our own naive leak checker here, relying on the -wrap
 369 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 370 // and free'd in Rust or C across the generated bindings shared library.
 371
 372 #define BT_MAX 128
 373 typedef struct allocation {
 374         struct allocation* next;
 375         void* ptr;
 376         const char* struct_name;
 377         int lineno;
 378 } allocation;
 379 static allocation* allocation_ll = NULL;
 380 static allocation* freed_ll = NULL;
 381
 382 extern void* __real_malloc(size_t len);
 383 extern void* __real_calloc(size_t nmemb, size_t len);
 384 extern void* __real_aligned_alloc(size_t alignment, size_t size);
 385 static void new_allocation(void* res, const char* struct_name, int lineno) {
 386         allocation* new_alloc = __real_malloc(sizeof(allocation));
 387         new_alloc->ptr = res;
 388         new_alloc->struct_name = struct_name;
 389         new_alloc->next = allocation_ll;
 390         new_alloc->lineno = lineno;
 391         allocation_ll = new_alloc;
 392 }
 393 static void* do_MALLOC(size_t len, const char* struct_name, int lineno) {
 394         void* res = __real_malloc(len);
 395         new_allocation(res, struct_name, lineno);
 396         return res;
 397 }
 398 #define MALLOC(len, struct_name) do_MALLOC(len, struct_name, __LINE__)
 399
 400 void __real_free(void* ptr);
 401 static void alloc_freed(void* ptr, int lineno) {
 402         allocation* p = NULL;
 403         allocation* it = allocation_ll;
 404         while (it->ptr != ptr) {
 405                 p = it; it = it->next;
 406                 if (it == NULL) {
 407                         p = NULL;
 408                         it = freed_ll;
 409                         while (it && it->ptr != ptr) { p = it; it = it->next; }
 410                         if (it == NULL) {
 411                                 DEBUG_PRINT("Tried to free unknown pointer %p at line %d.\\n", ptr, lineno);
 412                         } else {
 413                                 DEBUG_PRINT("Tried to free unknown pointer %p at line %d.\\n Possibly double-free from %s, allocated on line %d.", ptr, lineno, it->struct_name, it->lineno);
 414                         }
 415                         abort();
 416                 }
 417         }
 418         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 419         DO_ASSERT(it->ptr == ptr);
 420         it->next = freed_ll;
 421         freed_ll = it;
 422 }
 423 static void do_FREE(void* ptr, int lineno) {
 424         if ((unsigned long)ptr <= 4096) return; // Rust loves to create pointers to the NULL page for dummys
 425         alloc_freed(ptr, lineno);
 426         __real_free(ptr);
 427 }
 428 #define FREE(ptr) do_FREE(ptr, __LINE__)
 429
 430 static void CHECK_ACCESS(const void* ptr) {
 431         allocation* it = allocation_ll;
 432         while (it->ptr != ptr) {
 433                 it = it->next;
 434                 if (it == NULL) {
 435                         return; // addrsan should catch malloc-unknown and print more info than we have
 436                 }
 437         }
 438 }
 439 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v) \\
 440         if (v.is_owned && v.inner != NULL) { \\
 441                 const void *p = __unmangle_inner_ptr(v.inner); \\
 442                 if (p != NULL) { \\
 443                         CHECK_ACCESS(p); \\
 444                 } \\
 445         }
 446
 447 void* __wrap_malloc(size_t len) {
 448         void* res = __real_malloc(len);
 449         new_allocation(res, "malloc call", 0);
 450         return res;
 451 }
 452 void* __wrap_calloc(size_t nmemb, size_t len) {
 453         void* res = __real_calloc(nmemb, len);
 454         new_allocation(res, "calloc call", 0);
 455         return res;
 456 }
 457 void* __wrap_aligned_alloc(size_t alignment, size_t size) {
 458         void* res = __real_aligned_alloc(alignment, size);
 459         new_allocation(res, "aligned_alloc call", 0);
 460         return res;
 461 }
 462 void __wrap_free(void* ptr) {
 463         if (ptr == NULL) return;
 464         alloc_freed(ptr, 0);
 465         __real_free(ptr);
 466 }
 467
 468 void* __real_realloc(void* ptr, size_t newlen);
 469 void* __wrap_realloc(void* ptr, size_t len) {
 470         if (ptr != NULL) alloc_freed(ptr, 0);
 471         void* res = __real_realloc(ptr, len);
 472         new_allocation(res, "realloc call", 0);
 473         return res;
 474 }
 475 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 476         // Rust doesn't seem to use reallocarray currently
 477         DO_ASSERT(false);
 478 }
 479
 480 uint32_t __attribute__((export_name("TS_allocs_remaining"))) allocs_remaining() {
 481         uint32_t count = 0;
 482         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 483                 count++;
 484         }
 485         return count;
 486 }
 487 void __attribute__((export_name("TS_print_leaks"))) print_leaks() {
 488         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 489                 DEBUG_PRINT("%s %p remains. Allocated on line %d\\n", a->struct_name, a->ptr, a->lineno);
 490         }
 491 }
 492 """
 493         self.c_file_pfx = self.c_file_pfx + """
 494 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 495 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 496 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 497 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 498
 499 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 500
 501 #define DECL_ARR_TYPE(ty, name) \\
 502         struct name##array { \\
 503                 uint32_t arr_len; \\
 504                 ty elems[]; \\
 505         }; \\
 506         typedef struct name##array * name##Array; \\
 507         static inline name##Array init_##name##Array(size_t arr_len, int lineno) { \\
 508                 name##Array arr = (name##Array)do_MALLOC(arr_len * sizeof(ty) + sizeof(uint32_t), #name" array init", lineno); \\
 509                 arr->arr_len = arr_len; \\
 510                 return arr; \\
 511         }
 512
 513 DECL_ARR_TYPE(int64_t, int64_t);
 514 DECL_ARR_TYPE(int8_t, int8_t);
 515 DECL_ARR_TYPE(uint32_t, uint32_t);
 516 DECL_ARR_TYPE(void*, ptr);
 517 DECL_ARR_TYPE(char, char);
 518 typedef charArray jstring;
 519
 520 static inline jstring str_ref_to_ts(const char* chars, size_t len) {
 521         charArray arr = init_charArray(len, __LINE__);
 522         memcpy(arr->elems, chars, len);
 523         return arr;
 524 }
 525 static inline LDKStr str_ref_to_owned_c(const jstring str) {
 526         char* newchars = MALLOC(str->arr_len + 1, "String chars");
 527         memcpy(newchars, str->elems, str->arr_len);
 528         newchars[str->arr_len] = 0;
 529         LDKStr res = {
 530                 .chars = newchars,
 531                 .len = str->arr_len,
 532                 .chars_is_owned = true
 533         };
 534         return res;
 535 }
 536
 537 typedef bool jboolean;
 538
 539 uint32_t __attribute__((export_name("TS_malloc"))) TS_malloc(uint32_t size) {
 540         return (uint32_t)MALLOC(size, "JS-Called malloc");
 541 }
 542 void __attribute__((export_name("TS_free"))) TS_free(uint32_t ptr) {
 543         FREE((void*)ptr);
 544 }
 545
 546 jstring __attribute__((export_name("TS_get_ldk_c_bindings_version"))) TS_get_ldk_c_bindings_version() {
 547         const char *res = check_get_ldk_bindings_version();
 548         if (res == NULL) return NULL;
 549         return str_ref_to_ts(res, strlen(res));
 550 }
 551 jstring __attribute__((export_name("TS_get_ldk_version"))) get_ldk_version() {
 552         const char *res = check_get_ldk_version();
 553         if (res == NULL) return NULL;
 554         return str_ref_to_ts(res, strlen(res));
 555 }
 556 #include "version.c"
 557 """
 558
 559         self.c_version_file = """jstring __attribute__((export_name("TS_get_lib_version_string"))) TS_get_lib_version_string() {
 560         return str_ref_to_ts("<git_version_ldk_garbagecollected>", strlen("<git_version_ldk_garbagecollected>"));
 561 }"""
 562
 563         self.hu_struct_file_prefix = """
 564 import CommonBase from './CommonBase.mjs';
 565 import * as bindings from '../bindings.mjs'
 566
 567 """
 568         self.util_fn_pfx = self.hu_struct_file_prefix + "\nexport class UtilMethods extends CommonBase {\n"
 569         self.util_fn_sfx = "}"
 570         self.c_fn_ty_pfx = ""
 571         self.file_ext = ".mts"
 572         self.ptr_c_ty = "uint32_t"
 573         self.ptr_native_ty = "number"
 574         self.result_c_ty = "uint32_t"
 575         self.ptr_arr = "ptrArray"
 576         self.is_arr_some_check = ("", " != 0")
 577         self.get_native_arr_len_call = ("", "->arr_len")
 578
 579     def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
 580         return None
 581     def create_native_arr_call(self, arr_len, ty_info):
 582         if ty_info.c_ty == "ptrArray":
 583             assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
 584         return "init_" + ty_info.c_ty + "(" + arr_len + ", __LINE__)"
 585     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 586         if ty_info.c_ty == "int8_tArray":
 587             return ("memcpy(" + arr_name + "->elems, ", ", " + arr_len + ")")
 588         else:
 589             assert False
 590     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 591         if ty_info.c_ty == "int8_tArray":
 592             if copy:
 593                 return "memcpy(" + dest_name + ", " + arr_name + "->elems, " + arr_len + ")"
 594         if ty_info.c_ty == "ptrArray":
 595             return "(void*) " + arr_name + "->elems"
 596         else:
 597             assert not copy
 598             return arr_name + "->elems"
 599     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 600         assert False # Only called if above is None
 601     def get_native_arr_ptr_call(self, ty_info):
 602         if ty_info.subty is not None:
 603             return "(" + ty_info.subty.c_ty + "*)(((uint8_t*)", ") + 4)"
 604         return "(" + ty_info.c_ty + "*)(((uint8_t*)", ") + 4)"
 605     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
 606         return None
 607     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 608         if ty_info.c_ty == "int8_tArray":
 609             return None
 610         else:
 611             return None
 612
 613     def map_hu_array_elems(self, arr_name, conv_name, arr_ty, elem_ty):
 614         assert elem_ty.c_ty == "uint32_t" or elem_ty.c_ty.endswith("Array")
 615         return arr_name + " != null ? " + arr_name + ".map(" + conv_name + " => " + elem_ty.from_hu_conv[0] + ") : null"
 616
 617     def str_ref_to_native_call(self, var_name, str_len):
 618         return "str_ref_to_ts(" + var_name + ", " + str_len + ")"
 619     def str_ref_to_c_call(self, var_name):
 620         return "str_ref_to_owned_c(" + var_name + ")"
 621     def str_to_hu_conv(self, var_name):
 622         return "const " + var_name + "_conv: string = bindings.decodeString(" + var_name + ");"
 623     def str_from_hu_conv(self, var_name):
 624         return ("bindings.encodeString(" + var_name + ")", "")
 625
 626     def c_fn_name_define_pfx(self, fn_name, have_args):
 627         return " __attribute__((export_name(\"TS_" + fn_name + "\"))) TS_" + fn_name + "("
 628
 629     def init_str(self):
 630         return ""
 631
 632     def get_java_arr_len(self, arr_name):
 633         return "bindings.getArrayLength(" + arr_name + ")"
 634     def get_java_arr_elem(self, elem_ty, arr_name, idx):
 635         if elem_ty.c_ty == "uint32_t" or elem_ty.c_ty == "uintptr_t" or elem_ty.c_ty.endswith("Array"):
 636             return "bindings.getU32ArrayElem(" + arr_name + ", " + idx + ")"
 637         else:
 638             assert False
 639     def constr_hu_array(self, ty_info, arr_len):
 640         return "new Array(" + arr_len + ").fill(null)"
 641     def cleanup_converted_native_array(self, ty_info, arr_name):
 642         return "bindings.freeWasmMemory(" + arr_name + ")"
 643
 644     def primitive_arr_from_hu(self, mapped_ty, fixed_len, arr_name):
 645         inner = arr_name
 646         if fixed_len is not None:
 647             assert mapped_ty.c_ty == "int8_t"
 648             inner = "bindings.check_arr_len(" + arr_name + ", " + fixed_len + ")"
 649         if mapped_ty.c_ty.endswith("Array"):
 650             return ("bindings.encodeUint32Array(" + inner + ")", "")
 651         elif mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t":
 652             return ("bindings.encodeUint8Array(" + inner + ")", "")
 653         elif mapped_ty.c_ty == "uint32_t":
 654             return ("bindings.encodeUint32Array(" + inner + ")", "")
 655         elif mapped_ty.c_ty == "int64_t":
 656             return ("bindings.encodeUint64Array(" + inner + ")", "")
 657         else:
 658             print(mapped_ty.c_ty)
 659             assert False
 660
 661     def primitive_arr_to_hu(self, mapped_ty, fixed_len, arr_name, conv_name):
 662         assert mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t"
 663         return "const " + conv_name + ": Uint8Array = bindings.decodeUint8Array(" + arr_name + ");"
 664
 665     def var_decl_statement(self, ty_string, var_name, statement):
 666         return "const " + var_name + ": " + ty_string + " = " + statement
 667
 668     def java_arr_ty_str(self, elem_ty_str):
 669         return "number"
 670
 671     def for_n_in_range(self, n, minimum, maximum):
 672         return "for (var " + n + " = " + minimum + "; " + n + " < " + maximum + "; " + n + "++) {"
 673     def for_n_in_arr(self, n, arr_name, arr_elem_ty):
 674         return (arr_name + ".forEach((" + n + ": " + arr_elem_ty.java_hu_ty + ") => { ", " })")
 675
 676     def get_ptr(self, var):
 677         return "CommonBase.get_ptr_of(" + var + ")"
 678     def set_null_skip_free(self, var):
 679         return "CommonBase.set_null_skip_free(" + var + ");"
 680
 681     def add_ref(self, holder, referent):
 682         return "CommonBase.add_ref_from(" + holder + ", " + referent + ")"
 683
 684     def obj_defined(self, struct_names, folder):
 685         with open(self.outdir + "/index.mts", 'a') as index:
 686             index.write(f"export * from './{folder}/{struct_names[0]}.mjs';\n")
 687         with open(self.outdir + "/imports.mts.part", 'a') as imports:
 688             imports.write(f"import {{ {', '.join(struct_names)} }} from '../{folder}/{struct_names[0]}.mjs';\n")
 689
 690     def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
 691         out_c = "static inline LDK" + struct_name + " LDK" + struct_name + "_from_js(int32_t ord) {\n"
 692         out_c = out_c + "\tswitch (ord) {\n"
 693         ord_v = 0
 694
 695         out_typescript_enum_fields = ""
 696
 697         for var, var_docs in variants:
 698             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 699             ord_v = ord_v + 1
 700             if var_docs is not None:
 701                 var_docs_repld = var_docs.replace("\n", "\n\t")
 702                 out_typescript_enum_fields += f"/**\n\t * {var_docs_repld}\n\t */\n"
 703             out_typescript_enum_fields += f"\t{var},\n\t"
 704         out_c = out_c + "\t}\n"
 705         out_c = out_c + "\tabort();\n"
 706         out_c = out_c + "}\n"
 707
 708         out_c = out_c + "static inline int32_t LDK" + struct_name + "_to_js(LDK" + struct_name + " val) {\n"
 709         out_c = out_c + "\tswitch (val) {\n"
 710         ord_v = 0
 711         for var, _ in variants:
 712             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 713             ord_v = ord_v + 1
 714         out_c = out_c + "\t\tdefault: abort();\n"
 715         out_c = out_c + "\t}\n"
 716         out_c = out_c + "}\n"
 717
 718         out_typescript = f"""
 719 /* @internal */
 720 export enum {struct_name} {{
 721         {out_typescript_enum_fields}
 722 }}
 723 """
 724         out_typescript_enum = f"export {{ {struct_name} }} from \"../bindings.mjs\";"
 725         self.obj_defined([struct_name], "enums")
 726         return (out_c, out_typescript_enum, out_typescript)
 727
 728     def c_unitary_enum_to_native_call(self, ty_info):
 729         return (ty_info.rust_obj + "_to_js(", ")")
 730     def native_unitary_enum_to_c_call(self, ty_info):
 731         return (ty_info.rust_obj + "_from_js(", ")")
 732
 733     def native_c_map_trait(self, struct_name, field_var_conversions, flattened_field_var_conversions, field_function_lines, trait_doc_comment):
 734         out_typescript_bindings = ""
 735         super_instantiator = ""
 736         bindings_instantiator = ""
 737         pointer_to_adder = ""
 738         impl_constructor_arguments = ""
 739         for var in flattened_field_var_conversions:
 740             if isinstance(var, ConvInfo):
 741                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 742                 super_instantiator += first_to_lower(var.arg_name) + ", "
 743                 if var.from_hu_conv is not None:
 744                     bindings_instantiator += ", " + var.from_hu_conv[0]
 745                     if var.from_hu_conv[1] != "":
 746                         pointer_to_adder += "\t\t\t" + var.from_hu_conv[1] + ";\n"
 747                 else:
 748                     bindings_instantiator += ", " + first_to_lower(var.arg_name)
 749             else:
 750                 bindings_instantiator += ", " + first_to_lower(var[1]) + ".bindings_instance"
 751                 super_instantiator += first_to_lower(var[1]) + "_impl, "
 752                 pointer_to_adder += "\t\timpl_holder.held.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 753                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}Interface"
 754
 755         super_constructor_statements = ""
 756         trait_constructor_arguments = ""
 757         for var in field_var_conversions:
 758             if isinstance(var, ConvInfo):
 759                 trait_constructor_arguments += ", " + var.arg_name
 760             else:
 761                 super_constructor_statements += "\t\tconst " + first_to_lower(var[1]) + " = " + var[1] + ".new_impl(" + super_instantiator + ");\n"
 762                 trait_constructor_arguments += ", " + first_to_lower(var[1]) + ".bindings_instance"
 763                 for suparg in var[2]:
 764                     if isinstance(suparg, ConvInfo):
 765                         trait_constructor_arguments += ", " + suparg.arg_name
 766                     else:
 767                         trait_constructor_arguments += ", " + suparg[1]
 768
 769         # BUILD INTERFACE METHODS
 770         out_java_interface = ""
 771         out_interface_implementation_overrides = ""
 772         java_methods = []
 773         for fn_line in field_function_lines:
 774             java_method_descriptor = ""
 775             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 776                 out_java_interface += "\t" + fn_line.fn_name + "("
 777                 out_interface_implementation_overrides += f"\t\t\t{fn_line.fn_name} ("
 778
 779                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 780                     if idx >= 1:
 781                         out_java_interface += ", "
 782                         out_interface_implementation_overrides += ", "
 783                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 784                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 785                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 786                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n"
 787                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 788                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 789
 790                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 791
 792                 for arg_info in fn_line.args_ty:
 793                     if arg_info.to_hu_conv is not None:
 794                         out_interface_implementation_overrides += "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 795
 796                 if fn_line.ret_ty_info.java_ty != "void":
 797                     out_interface_implementation_overrides += "\t\t\t\tconst ret: " + fn_line.ret_ty_info.java_hu_ty + " = arg." + fn_line.fn_name + "("
 798                 else:
 799                     out_interface_implementation_overrides += f"\t\t\t\targ." + fn_line.fn_name + "("
 800
 801                 for idx, arg_info in enumerate(fn_line.args_ty):
 802                     if idx != 0:
 803                         out_interface_implementation_overrides += ", "
 804                     if arg_info.to_hu_conv_name is not None:
 805                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 806                     else:
 807                         out_interface_implementation_overrides += arg_info.arg_name
 808
 809                 out_interface_implementation_overrides += ");\n"
 810                 if fn_line.ret_ty_info.java_ty != "void":
 811                     if fn_line.ret_ty_info.from_hu_conv is not None:
 812                         out_interface_implementation_overrides += "\t\t\t\t" + f"const result: {fn_line.ret_ty_info.java_ty} = " + fn_line.ret_ty_info.from_hu_conv[0].replace("\n", "\n\t\t\t\t") + ";\n"
 813                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 814                             out_interface_implementation_overrides += "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held").replace("\n", "\n\t\t\t\t") + ";\n"
 815                         #if fn_line.ret_ty_info.rust_obj in result_types:
 816                         # XXX: We need to handle this in conversion logic so that its cross-language!
 817                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 818                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 819                         out_interface_implementation_overrides += "\t\t\t\treturn result;\n"
 820                     else:
 821                         out_interface_implementation_overrides += "\t\t\t\treturn ret;\n"
 822                 out_interface_implementation_overrides += f"\t\t\t}},\n"
 823
 824         out_typescript_human = f"""
 825 {self.hu_struct_file_prefix}
 826
 827 export interface {struct_name.replace("LDK", "")}Interface {{
 828 {out_java_interface}}}
 829
 830 class {struct_name}Holder {{
 831         held: {struct_name.replace("LDK", "")};
 832 }}
 833
 834 export class {struct_name.replace("LDK","")} extends CommonBase {{
 835         /* @internal */
 836         public bindings_instance?: bindings.{struct_name};
 837
 838         /* @internal */
 839         constructor(_dummy: object, ptr: number) {{
 840                 super(ptr, bindings.{struct_name.replace("LDK","")}_free);
 841                 this.bindings_instance = null;
 842         }}
 843
 844         static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 845                 const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 846                 let structImplementation = {{
 847 {out_interface_implementation_overrides}                }} as bindings.{struct_name};
 848 {super_constructor_statements}          const ptr: number = bindings.{struct_name}_new(structImplementation{bindings_instantiator});
 849
 850                 impl_holder.held = new {struct_name.replace("LDK", "")}(null, ptr);
 851                 impl_holder.held.bindings_instance = structImplementation;
 852 {pointer_to_adder}              return impl_holder.held;
 853         }}
 854 """
 855         self.obj_defined([struct_name.replace("LDK", ""), struct_name.replace("LDK", "") + "Interface"], "structs")
 856
 857         out_typescript_bindings += "/* @internal */\nexport interface " + struct_name + " {\n"
 858         java_meths = []
 859         for fn_line in field_function_lines:
 860             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 861                 out_typescript_bindings += f"\t{fn_line.fn_name} ("
 862
 863                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 864                     if idx >= 1:
 865                         out_typescript_bindings = out_typescript_bindings + ", "
 866                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 867
 868                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 869
 870         out_typescript_bindings += "}\n\n"
 871
 872         out_typescript_bindings += f"/* @internal */\nexport function {struct_name}_new(impl: {struct_name}"
 873         for var in flattened_field_var_conversions:
 874             if isinstance(var, ConvInfo):
 875                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 876             else:
 877                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 878
 879         out_typescript_bindings += f"""): number {{
 880         if(!isWasmInitialized) {{
 881                 throw new Error("initializeWasm() must be awaited first!");
 882         }}
 883         var new_obj_idx = js_objs.length;
 884         for (var i = 0; i < js_objs.length; i++) {{
 885                 if (js_objs[i] == null || js_objs[i] == undefined) {{ new_obj_idx = i; break; }}
 886         }}
 887         js_objs[i] = new WeakRef(impl);
 888         return wasm.TS_{struct_name}_new(i);
 889 }}
 890 """
 891
 892         # Now that we've written out our java code (and created java_meths), generate C
 893         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 894         out_c += "\tatomic_size_t refcnt;\n"
 895         out_c += "\tuint32_t instance_ptr;\n"
 896         for var in flattened_field_var_conversions:
 897             if isinstance(var, ConvInfo):
 898                 # We're a regular ol' field
 899                 pass
 900             else:
 901                 # We're a supertrait
 902                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 903         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 904
 905         for fn_line in field_function_lines:
 906             if fn_line.fn_name == "free":
 907                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 908                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 909                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 910                 out_c = out_c + "\t\tFREE(j_calls);\n"
 911                 out_c = out_c + "\t}\n}\n"
 912
 913         for idx, fn_line in enumerate(field_function_lines):
 914             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 915                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 916                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
 917                 if fn_line.self_is_const:
 918                     out_c = out_c + "const void* this_arg"
 919                 else:
 920                     out_c = out_c + "void* this_arg"
 921
 922                 for idx, arg in enumerate(fn_line.args_ty):
 923                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 924
 925                 out_c = out_c + ") {\n"
 926                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 927
 928                 for arg_info in fn_line.args_ty:
 929                     if arg_info.ret_conv is not None:
 930                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 931                         out_c = out_c + arg_info.arg_name
 932                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 933
 934                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 935                     out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (" + fn_line.ret_ty_info.c_ty + ")"
 936                     out_c += "js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
 937                 elif fn_line.ret_ty_info.java_ty == "void":
 938                     out_c = out_c + "\tjs_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
 939                 elif fn_line.ret_ty_info.java_hu_ty == "string":
 940                     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)
 941                 elif not fn_line.ret_ty_info.passed_as_ptr:
 942                     out_c = out_c + "\treturn js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
 943                 else:
 944                     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)
 945
 946                 self.function_ptrs[self.function_ptr_counter] = (struct_name, fn_line.fn_name)
 947                 self.function_ptr_counter += 1
 948
 949                 for idx, arg_info in enumerate(fn_line.args_ty):
 950                     if arg_info.ret_conv is not None:
 951                         out_c = out_c + ", (uint32_t)" + arg_info.ret_conv_name
 952                     else:
 953                         out_c = out_c + ", (uint32_t)" + arg_info.arg_name
 954                 out_c = out_c + ");\n"
 955                 if fn_line.ret_ty_info.arg_conv is not None:
 956                     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"
 957
 958                 out_c = out_c + "}\n"
 959
 960         # Write out a clone function whether we need one or not, as we use them in moving to rust
 961         out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n"
 962         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n"
 963         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 964         for var in field_var_conversions:
 965             if not isinstance(var, ConvInfo):
 966                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 967         out_c = out_c + "}\n"
 968
 969         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (JSValue o"
 970         for var in flattened_field_var_conversions:
 971             if isinstance(var, ConvInfo):
 972                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 973             else:
 974                 out_c = out_c + ", JSValue " + var[1]
 975         out_c = out_c + ") {\n"
 976
 977         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 978         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 979         out_c = out_c + "\tcalls->instance_ptr = o;\n"
 980
 981         for (fn_name, java_meth_descr) in java_meths:
 982             if fn_name != "free" and fn_name != "cloned":
 983                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 984                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 985
 986         for var in flattened_field_var_conversions:
 987             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 988                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 989         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 990         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 991         for fn_line in field_function_lines:
 992             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 993                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
 994             elif fn_line.fn_name == "free":
 995                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 996             else:
 997                 out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n"
 998         for var in field_var_conversions:
 999             if isinstance(var, ConvInfo):
1000                 if var.arg_conv_name is not None:
1001                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
1002                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
1003                 else:
1004                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
1005                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
1006             else:
1007                 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(" + var[1]
1008                 for suparg in var[2]:
1009                     if isinstance(suparg, ConvInfo):
1010                         out_c += ", " + suparg.arg_name
1011                     else:
1012                         out_c += ", " + suparg[1]
1013                 out_c += "),\n"
1014         out_c = out_c + "\t};\n"
1015         for var in flattened_field_var_conversions:
1016             if not isinstance(var, ConvInfo):
1017                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
1018         out_c = out_c + "\treturn ret;\n"
1019         out_c = out_c + "}\n"
1020
1021         out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "JSValue o"
1022         for var in flattened_field_var_conversions:
1023             if isinstance(var, ConvInfo):
1024                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
1025             else:
1026                 out_c = out_c + ", JSValue " + var[1]
1027         out_c = out_c + ") {\n"
1028         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
1029         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(o"
1030         for var in flattened_field_var_conversions:
1031             if isinstance(var, ConvInfo):
1032                 out_c = out_c + ", " + var.arg_name
1033             else:
1034                 out_c = out_c + ", " + var[1]
1035         out_c = out_c + ");\n"
1036         out_c = out_c + "\treturn (long)res_ptr;\n"
1037         out_c = out_c + "}\n"
1038
1039         return (out_typescript_bindings, out_typescript_human, out_c)
1040
1041     def trait_struct_inc_refcnt(self, ty_info):
1042         return ""
1043
1044     def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
1045         bindings_type = struct_name.replace("LDK", "")
1046         java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
1047
1048         out_java_enum = ""
1049         out_java = ""
1050         out_c = ""
1051
1052         out_java_enum += (self.hu_struct_file_prefix)
1053
1054         java_hu_class = ""
1055         java_hu_class += "export class " + java_hu_type + " extends CommonBase {\n"
1056         java_hu_class += "\tprotected constructor(_dummy: object, ptr: number) { super(ptr, bindings." + bindings_type + "_free); }\n"
1057         java_hu_class += "\t/* @internal */\n"
1058         java_hu_class += f"\tpublic static constr_from_ptr(ptr: number): {java_hu_type} {{\n"
1059         java_hu_class += f"\t\tconst raw_ty: number = bindings." + struct_name + "_ty_from_ptr(ptr);\n"
1060         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"
1061         out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n"
1062         out_c += "\tswitch(obj->tag) {\n"
1063         java_hu_class += "\t\tswitch (raw_ty) {\n"
1064         java_hu_subclasses = ""
1065
1066         out_java += "/* @internal */\nexport class " + struct_name + " {\n"
1067         out_java += "\tprotected constructor() {}\n"
1068         var_idx = 0
1069         for var in variant_list:
1070             java_hu_subclasses = java_hu_subclasses + "export class " + java_hu_type + "_" + var.var_name + " extends " + java_hu_type + " {\n"
1071             java_hu_class += f"\t\t\tcase {var_idx}: "
1072             java_hu_class += "return new " + java_hu_type + "_" + var.var_name + "(ptr);\n"
1073             out_c += f"\t\tcase {struct_name}_{var.var_name}: return {var_idx};\n"
1074             hu_conv_body = ""
1075             for idx, (field_ty, field_docs) in enumerate(var.fields):
1076                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
1077                 if field_ty.to_hu_conv is not None:
1078                     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"
1079                     hu_conv_body += f"\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
1080                     hu_conv_body += f"\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
1081                 else:
1082                     hu_conv_body += f"\t\tthis.{field_ty.arg_name} = bindings.{struct_name}_{var.var_name}_get_{field_ty.arg_name}(ptr);\n"
1083             java_hu_subclasses += "\t/* @internal */\n"
1084             java_hu_subclasses += "\tpublic constructor(ptr: number) {\n\t\tsuper(null, ptr);\n"
1085             java_hu_subclasses = java_hu_subclasses + hu_conv_body
1086             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
1087             var_idx += 1
1088         out_java += "}\n"
1089         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"
1090         out_java += self.fn_call_body(struct_name + "_ty_from_ptr", "uint32_t", "number", "ptr: number", "ptr")
1091         out_c += ("\t\tdefault: abort();\n")
1092         out_c += ("\t}\n}\n")
1093
1094         for var in variant_list:
1095             for idx, (field_map, _) in enumerate(var.fields):
1096                 fn_name = f"{struct_name}_{var.var_name}_get_{field_map.arg_name}"
1097                 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"
1098                 out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n"
1099                 out_c += f"\tassert(obj->tag == {struct_name}_{var.var_name});\n"
1100                 if field_map.ret_conv is not None:
1101                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
1102                     if var.tuple_variant:
1103                         out_c += "obj->" + camel_to_snake(var.var_name)
1104                     else:
1105                         out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
1106                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
1107                     out_c += "\treturn " + field_map.ret_conv_name + ";\n"
1108                 else:
1109                     if var.tuple_variant:
1110                         out_c += "\treturn " + "obj->" + camel_to_snake(var.var_name) + ";\n"
1111                     else:
1112                         out_c += "\treturn " + "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name + ";\n"
1113                 out_c += "}\n"
1114                 out_java += self.fn_call_body(fn_name, field_map.c_ty, field_map.java_ty, "ptr: number", "ptr")
1115         out_java_enum += java_hu_class
1116         self.struct_file_suffixes[java_hu_type] = java_hu_subclasses
1117         self.obj_defined([java_hu_type], "structs")
1118         return (out_java, out_java_enum, out_c)
1119
1120     def map_opaque_struct(self, struct_name, struct_doc_comment):
1121         implementations = ""
1122         method_header = ""
1123
1124         hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple").replace("LDK", "")
1125         out_opaque_struct_human = f"{self.hu_struct_file_prefix}"
1126         if struct_name.startswith("LDKLocked"):
1127             out_opaque_struct_human += "/** XXX: DO NOT USE THIS - it remains locked until the GC runs (if that ever happens */"
1128         out_opaque_struct_human += f"""
1129 export class {hu_name} extends CommonBase {implementations}{{
1130         /* @internal */
1131         public constructor(_dummy: object, ptr: number) {{
1132                 super(ptr, bindings.{struct_name.replace("LDK","")}_free);
1133         }}
1134
1135 """
1136         self.obj_defined([hu_name], "structs")
1137         return out_opaque_struct_human
1138
1139     def map_tuple(self, struct_name):
1140         return self.map_opaque_struct(struct_name, "A Tuple")
1141
1142     def map_result(self, struct_name, res_map, err_map):
1143         human_ty = struct_name.replace("LDKCResult", "Result")
1144
1145         suffixes = f"export class {human_ty}_OK extends {human_ty} {{\n"
1146         if res_map.java_hu_ty != "void":
1147             suffixes += "\tpublic res: " + res_map.java_hu_ty + ";\n"
1148         suffixes += f"""
1149         /* @internal */
1150         public constructor(_dummy: object, ptr: number) {{
1151                 super(_dummy, ptr);
1152 """
1153         if res_map.java_hu_ty == "void":
1154             pass
1155         elif res_map.to_hu_conv is not None:
1156             suffixes += "\t\tconst res: " + res_map.java_ty + " = bindings." + struct_name.replace("LDK", "") + "_get_ok(ptr);\n"
1157             suffixes += "\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t")
1158             suffixes += "\n\t\tthis.res = " + res_map.to_hu_conv_name + ";\n"
1159         else:
1160             suffixes += "\t\tthis.res = bindings." + struct_name.replace("LDK", "") + "_get_ok(ptr);\n"
1161         suffixes += "\t}\n}\n"
1162
1163         suffixes += f"export class {human_ty}_Err extends {human_ty} {{\n"
1164         if err_map.java_hu_ty != "void":
1165             suffixes += "\tpublic err: " + err_map.java_hu_ty + ";\n"
1166         suffixes += f"""
1167         /* @internal */
1168         public constructor(_dummy: object, ptr: number) {{
1169                 super(_dummy, ptr);
1170 """
1171         if err_map.java_hu_ty == "void":
1172             pass
1173         elif err_map.to_hu_conv is not None:
1174             suffixes += "\t\tconst err: " + err_map.java_ty + " = bindings." + struct_name.replace("LDK", "") + "_get_err(ptr);\n"
1175             suffixes += "\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t")
1176             suffixes += "\n\t\tthis.err = " + err_map.to_hu_conv_name + ";\n"
1177         else:
1178             suffixes += "\t\tthis.err = bindings." + struct_name.replace("LDK", "") + "_get_err(ptr);\n"
1179         suffixes += "\t}\n}"
1180
1181         self.struct_file_suffixes[human_ty] = suffixes
1182         self.obj_defined([human_ty], "structs")
1183
1184         return f"""{self.hu_struct_file_prefix}
1185
1186 export class {human_ty} extends CommonBase {{
1187         protected constructor(_dummy: object, ptr: number) {{
1188                 super(ptr, bindings.{struct_name.replace("LDK","")}_free);
1189         }}
1190         /* @internal */
1191         public static constr_from_ptr(ptr: number): {human_ty} {{
1192                 if (bindings.{struct_name.replace("LDK", "")}_is_ok(ptr)) {{
1193                         return new {human_ty}_OK(null, ptr);
1194                 }} else {{
1195                         return new {human_ty}_Err(null, ptr);
1196                 }}
1197         }}
1198 """
1199
1200     def fn_call_body(self, method_name, return_c_ty, return_java_ty, method_argument_string, native_call_argument_string):
1201         has_return_value = return_c_ty != 'void'
1202         return_statement = 'return nativeResponseValue;'
1203         if not has_return_value:
1204             return_statement = '// debug statements here'
1205
1206         return f"""/* @internal */
1207 export function {method_name}({method_argument_string}): {return_java_ty} {{
1208         if(!isWasmInitialized) {{
1209                 throw new Error("initializeWasm() must be awaited first!");
1210         }}
1211         const nativeResponseValue = wasm.TS_{method_name}({native_call_argument_string});
1212         {return_statement}
1213 }}
1214 """
1215     def map_function(self, argument_types, c_call_string, method_name, meth_n, return_type_info, struct_meth, default_constructor_args, takes_self, takes_self_as_ref, args_known, type_mapping_generator, doc_comment):
1216         out_java = ""
1217         out_c = ""
1218         out_java_struct = None
1219
1220         out_java += ("\t")
1221         out_c += (self.c_fn_ty_pfx)
1222         out_c += (return_type_info.c_ty)
1223         out_java += (return_type_info.java_ty)
1224         if return_type_info.ret_conv is not None:
1225             ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
1226         out_java += (" " + method_name + "(")
1227         out_c += (" "  + self.c_fn_name_define_pfx(method_name, True))
1228
1229         method_argument_string = ""
1230         native_call_argument_string = ""
1231         for idx, arg_conv_info in enumerate(argument_types):
1232             if idx != 0:
1233                 method_argument_string += (", ")
1234                 native_call_argument_string += ', '
1235                 out_c += (", ")
1236             if arg_conv_info.c_ty != "void":
1237                 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
1238                 method_argument_string += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
1239                 native_call_argument_string += arg_conv_info.arg_name
1240         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)
1241
1242         out_java_struct = ""
1243         if not args_known:
1244             out_java_struct += ("\t// Skipped " + method_name + "\n")
1245         else:
1246             if not takes_self:
1247                 out_java_struct += (
1248                         "\tpublic static constructor_" + meth_n + "(")
1249             else:
1250                 out_java_struct += ("\tpublic " + meth_n + "(")
1251             for idx, arg in enumerate(argument_types):
1252                 if idx != 0:
1253                     if not takes_self or idx > 1:
1254                         out_java_struct += (", ")
1255                 elif takes_self:
1256                     continue
1257                 if arg.java_ty != "void":
1258                     if arg.arg_name in default_constructor_args:
1259                         for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1260                             if explode_idx != 0:
1261                                 out_java_struct += (", ")
1262                             out_java_struct += arg.arg_name + "_" + explode_arg.arg_name + ": " + explode_arg.java_hu_ty
1263                     else:
1264                         out_java_struct += arg.arg_name + ": " + arg.java_hu_ty
1265
1266         out_c += (") {\n")
1267         if out_java_struct is not None:
1268             out_java_struct += "): " + return_type_info.java_hu_ty + " {\n"
1269         for info in argument_types:
1270             if info.arg_conv is not None:
1271                 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1272         if return_type_info.ret_conv is not None:
1273             out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1274         elif return_type_info.c_ty != "void":
1275             out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1276         else:
1277             out_c += ("\t")
1278         if c_call_string is None:
1279             out_c += (method_name + "(")
1280         else:
1281             out_c += (c_call_string)
1282         for idx, info in enumerate(argument_types):
1283             if info.arg_conv_name is not None:
1284                 if idx != 0:
1285                     out_c += (", ")
1286                 elif c_call_string is not None:
1287                     continue
1288                 out_c += (info.arg_conv_name)
1289         out_c += (")")
1290         if return_type_info.ret_conv is not None:
1291             out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1292         else:
1293             out_c += (";")
1294         for info in argument_types:
1295             if info.arg_conv_cleanup is not None:
1296                 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1297         if return_type_info.ret_conv is not None:
1298             out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1299         elif return_type_info.c_ty != "void":
1300             out_c += ("\n\treturn ret_val;")
1301         out_c += ("\n}\n\n")
1302
1303         if args_known:
1304             out_java_struct += ("\t\t")
1305             if return_type_info.java_ty != "void":
1306                 out_java_struct += "const ret: " + return_type_info.java_ty + " = "
1307             out_java_struct += ("bindings." + method_name + "(")
1308             for idx, info in enumerate(argument_types):
1309                 if idx != 0:
1310                     out_java_struct += (", ")
1311                 if idx == 0 and takes_self:
1312                     out_java_struct += ("this.ptr")
1313                 elif info.arg_name in default_constructor_args:
1314                     out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1315                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1316                         if explode_idx != 0:
1317                             out_java_struct += (", ")
1318                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1319                         if explode_arg.from_hu_conv is not None:
1320                             out_java_struct += (
1321                                 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1322                         else:
1323                             out_java_struct += (expl_arg_name)
1324                     out_java_struct += (")")
1325                 elif info.from_hu_conv is not None:
1326                     out_java_struct += (info.from_hu_conv[0])
1327                 else:
1328                     out_java_struct += (info.arg_name)
1329             out_java_struct += (");\n")
1330             if return_type_info.to_hu_conv is not None:
1331                 if not takes_self:
1332                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1333                                                                                                              return_type_info.to_hu_conv_name) + "\n")
1334                 else:
1335                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1336
1337             for idx, info in enumerate(argument_types):
1338                 if idx == 0 and takes_self:
1339                     pass
1340                 elif info.arg_name in default_constructor_args:
1341                     for explode_arg in default_constructor_args[info.arg_name]:
1342                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1343                         if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1344                             out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1345                                                                                              expl_arg_name).replace(
1346                                 "this", return_type_info.to_hu_conv_name) + ";\n")
1347                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1348                     if not takes_self and return_type_info.to_hu_conv_name is not None:
1349                         out_java_struct += (
1350                                 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1351                     else:
1352                         out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1353
1354             if return_type_info.to_hu_conv_name is not None:
1355                 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1356             elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1357                 out_java_struct += ("\t\treturn ret;\n")
1358             out_java_struct += ("\t}\n\n")
1359
1360         return (out_java, out_c, out_java_struct)
1361
1362     def cleanup(self):
1363         for struct in self.struct_file_suffixes:
1364             with open(self.outdir + "/structs/" + struct + self.file_ext, "a") as src:
1365                 src.write(self.struct_file_suffixes[struct])
1366
1367         with open(self.outdir + "/bindings.mts", "a") as bindings:
1368             bindings.write("""
1369
1370 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) {
1371         const weak: WeakRef<object> = js_objs[obj_ptr];
1372         if (weak == null || weak == undefined) {
1373                 console.error("Got function call on unknown/free'd JS object!");
1374                 throw new Error("Got function call on unknown/free'd JS object!");
1375         }
1376         const obj: object = weak.deref();
1377         if (obj == null || obj == undefined) {
1378                 console.error("Got function call on GC'd JS object!");
1379                 throw new Error("Got function call on GC'd JS object!");
1380         }
1381         var fn;
1382 """)
1383             bindings.write("\tswitch (fn_id) {\n")
1384             for f in self.function_ptrs:
1385                 bindings.write(f"\t\tcase {str(f)}: fn = Object.getOwnPropertyDescriptor(obj, \"{self.function_ptrs[f][1]}\"); break;\n")
1386
1387             bindings.write("""\t\tdefault:
1388                         console.error("Got unknown function call from C!");
1389                         throw new Error("Got unknown function call from C!");
1390         }
1391         if (fn == null || fn == undefined) {
1392                 console.error("Got function call on incorrect JS object!");
1393                 throw new Error("Got function call on incorrect JS object!");
1394         }
1395         return fn.value.bind(obj)(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10);
1396 }""")