_ 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             bool = ['boolean', 'boolean', 'XXX'],
  21             uint8_t = ['number', 'number', 'Uint8Array'],
  22             uint16_t = ['number', 'number', 'Uint16Array'],
  23             uint32_t = ['number', 'number', 'Uint32Array'],
  24             uint64_t = ['bigint', 'bigint', 'BigUint64Array'],
  25         )
  26         self.java_type_map = dict(
  27             String = "number"
  28         )
  29         self.java_hu_type_map = dict(
  30             String = "string"
  31         )
  32
  33         self.to_hu_conv_templates = dict(
  34             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  35             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  36         )
  37
  38         self.bindings_header = """
  39 import * as version from './version.mjs';
  40 import { UInt5, WitnessVersion } from './structs/CommonBase.mjs';
  41
  42 const imports: any = {};
  43 imports.env = {};
  44
  45 var js_objs: Array<WeakRef<object>> = [];
  46 var js_invoke: Function;
  47 var getRandomValues: Function;
  48
  49 imports.wasi_snapshot_preview1 = {
  50         "fd_write": (fd: number, iovec_array_ptr: number, iovec_array_len: number, bytes_written_ptr: number) => {
  51                 // This should generally only be used to print panic messages
  52                 const ptr_len_view = new Uint32Array(wasm.memory.buffer, iovec_array_ptr, iovec_array_len * 2);
  53                 var bytes_written = 0;
  54                 for (var i = 0; i < iovec_array_len; i++) {
  55                         const bytes_view = new Uint8Array(wasm.memory.buffer, ptr_len_view[i*2], ptr_len_view[i*2+1]);
  56                         console.log("[fd " + fd + "]: " + String.fromCharCode(...bytes_view));
  57                         bytes_written += ptr_len_view[i*2+1]!;
  58                 }
  59                 const written_view = new Uint32Array(wasm.memory.buffer, bytes_written_ptr, 1);
  60                 written_view[0] = bytes_written;
  61                 return 0;
  62         },
  63         "fd_close": (_fd: number) => {
  64                 // This is not generally called, but may be referenced in debug builds
  65                 console.log("wasi_snapshot_preview1:fd_close");
  66                 return 58; // Not Supported
  67         },
  68         "fd_seek": (_fd: number, _offset: bigint, _whence: number, _new_offset: number) => {
  69                 // This is not generally called, but may be referenced in debug builds
  70                 console.log("wasi_snapshot_preview1:fd_seek");
  71                 return 58; // Not Supported
  72         },
  73         "random_get": (buf_ptr: number, buf_len: number) => {
  74                 const buf = new Uint8Array(wasm.memory.buffer, buf_ptr, buf_len);
  75                 getRandomValues(buf);
  76                 return 0;
  77         },
  78         "environ_sizes_get": (environ_var_count_ptr: number, environ_len_ptr: number) => {
  79                 // This is called before fd_write to format + print panic messages
  80                 const out_count_view = new Uint32Array(wasm.memory.buffer, environ_var_count_ptr, 1);
  81                 out_count_view[0] = 0;
  82                 const out_len_view = new Uint32Array(wasm.memory.buffer, environ_len_ptr, 1);
  83                 out_len_view[0] = 0;
  84                 return 0;
  85         },
  86         "environ_get": (_environ_ptr: number, _environ_buf_ptr: number) => {
  87                 // This is called before fd_write to format + print panic messages,
  88                 // but only if we have variables in environ_sizes_get, so shouldn't ever actually happen!
  89                 console.log("wasi_snapshot_preview1:environ_get");
  90                 return 58; // Note supported - we said there were 0 environment entries!
  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 async function finishInitializeWasm(wasmInstance: WebAssembly.Instance) {
 101         if (typeof crypto === "undefined") {
 102                 var crypto_import = (await import('crypto')).webcrypto;
 103                 getRandomValues = crypto_import.getRandomValues.bind(crypto_import);
 104         } else {
 105                 getRandomValues = crypto.getRandomValues.bind(crypto);
 106         }
 107
 108         wasm = wasmInstance.exports;
 109         if (!wasm.test_bigint_pass_deadbeef0badf00d(BigInt("0xdeadbeef0badf00d"))) {
 110                 throw new Error(\"Currently need BigInt-as-u64 support, try ----experimental-wasm-bigint");
 111         }
 112
 113         if (decodeString(wasm.TS_get_lib_version_string()) !== version.get_ldk_java_bindings_version())
 114                 throw new Error(\"Compiled LDK library and LDK class files do not match\");
 115         // Fetching the LDK versions from C also checks that the header and binaries match
 116         const c_bindings_ver: number = wasm.TS_get_ldk_c_bindings_version();
 117         const ldk_ver: number = wasm.TS_get_ldk_version();
 118         if (c_bindings_ver == 0)
 119                 throw new Error(\"LDK version did not match the header we built against\");
 120         if (ldk_ver == 0)
 121                 throw new Error(\"LDK C bindings version did not match the header we built against\");
 122         const c_bindings_version: string = decodeString(c_bindings_ver)
 123         const ldk_version: string = decodeString(ldk_ver);
 124         console.log(\"Loaded LDK-Java Bindings with LDK \" + ldk_version + \" and LDK-C-Bindings \" + c_bindings_version);
 125
 126         isWasmInitialized = true;
 127 }
 128
 129 const fn_list = ["uuuuuu", "buuuuu", "bbuuuu", "bbbuuu", "bbbbuu",
 130         "bbbbbb", "ubuubu", "ubuuuu", "ubbuuu", "uubuuu", "uububu", "ububuu"];
 131
 132 /* @internal */
 133 export async function initializeWasmFromUint8Array(wasmBinary: Uint8Array) {
 134         for (const fn of fn_list) { imports.env["js_invoke_function_" + fn] = js_invoke; }
 135         const { instance: wasmInstance } = await WebAssembly.instantiate(wasmBinary, imports);
 136         await finishInitializeWasm(wasmInstance);
 137 }
 138
 139 /* @internal */
 140 export async function initializeWasmFetch(uri: string) {
 141         for (const fn of fn_list) { imports.env["js_invoke_function_" + fn] = js_invoke; }
 142         const stream = fetch(uri);
 143         const { instance: wasmInstance } = await WebAssembly.instantiateStreaming(stream, imports);
 144         await finishInitializeWasm(wasmInstance);
 145 }"""
 146
 147         self.bindings_header += """
 148 // WASM CODEC
 149
 150 /* @internal */
 151 export function uint5ArrToBytes(inputArray: Array<UInt5>): Uint8Array {
 152         const arr = new Uint8Array(inputArray.length);
 153         for (var i = 0; i < inputArray.length; i++) {
 154                 arr[i] = inputArray[i]!.getVal();
 155         }
 156         return arr;
 157 }
 158
 159 /* @internal */
 160 export function WitnessVersionArrToBytes(inputArray: Array<WitnessVersion>): Uint8Array {
 161         const arr = new Uint8Array(inputArray.length);
 162         for (var i = 0; i < inputArray.length; i++) {
 163                 arr[i] = inputArray[i]!.getVal();
 164         }
 165         return arr;
 166 }
 167
 168
 169
 170 /* @internal */
 171 export function encodeUint128 (inputVal: bigint): number {
 172         if (inputVal >= 0x10000000000000000000000000000000n) throw "U128s cannot exceed 128 bits";
 173         const cArrayPointer = wasm.TS_malloc(16 + 8);
 174         const arrayLengthView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
 175         arrayLengthView[0] = BigInt(16);
 176         const arrayMemoryView = new Uint8Array(wasm.memory.buffer, cArrayPointer + 8, 16);
 177         for (var i = 0; i < 16; i++) arrayMemoryView[i] = Number((inputVal >> BigInt(i)*8n) & 0xffn);
 178         return cArrayPointer;
 179 }
 180 /* @internal */
 181 export function encodeUint8Array (inputArray: Uint8Array|null): number {
 182         if (inputArray == null) return 0;
 183         const cArrayPointer = wasm.TS_malloc(inputArray.length + 8);
 184         const arrayLengthView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
 185         arrayLengthView[0] = BigInt(inputArray.length);
 186         const arrayMemoryView = new Uint8Array(wasm.memory.buffer, cArrayPointer + 8, inputArray.length);
 187         arrayMemoryView.set(inputArray);
 188         return cArrayPointer;
 189 }
 190 /* @internal */
 191 export function encodeUint32Array (inputArray: Uint32Array|Array<number>|null): number {
 192         if (inputArray == null) return 0;
 193         const cArrayPointer = wasm.TS_malloc((inputArray.length + 2) * 4);
 194         const arrayLengthView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, 1);
 195         arrayLengthView[0] = BigInt(inputArray.length);
 196         const arrayMemoryView = new Uint32Array(wasm.memory.buffer, cArrayPointer + 8, inputArray.length);
 197         arrayMemoryView.set(inputArray);
 198         return cArrayPointer;
 199 }
 200 /* @internal */
 201 export function encodeUint64Array (inputArray: BigUint64Array|Array<bigint>|null): number {
 202         if (inputArray == null) return 0;
 203         const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 8);
 204         const arrayMemoryView = new BigUint64Array(wasm.memory.buffer, cArrayPointer, inputArray.length + 1);
 205         arrayMemoryView[0] = BigInt(inputArray.length);
 206         arrayMemoryView.set(inputArray, 1);
 207         return cArrayPointer;
 208 }
 209
 210 /* @internal */
 211 export function check_arr_len(arr: Uint8Array|null, len: number): Uint8Array|null {
 212         if (arr !== null && arr.length != len) { throw new Error("Expected array of length " + len + " got " + arr.length); }
 213         return arr;
 214 }
 215
 216 /* @internal */
 217 export function getArrayLength(arrayPointer: number): number {
 218         const arraySizeViewer = new BigUint64Array(wasm.memory.buffer, arrayPointer, 1);
 219         const len = arraySizeViewer[0]!;
 220         if (len >= (2n ** 32n)) throw new Error("Bogus Array Size");
 221         return Number(len % (2n ** 32n));
 222 }
 223 /* @internal */
 224 export function decodeUint128 (arrayPointer: number, free = true): bigint {
 225         const arraySize = getArrayLength(arrayPointer);
 226         if (arraySize != 16) throw "Need 16 bytes for a uint128";
 227         const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 8, arraySize);
 228         var val = 0n;
 229         for (var i = 0; i < 16; i++) {
 230                 val <<= 8n;
 231                 val |= BigInt(actualArrayViewer[i]!);
 232         }
 233         if (free) {
 234                 wasm.TS_free(arrayPointer);
 235         }
 236         return val;
 237 }
 238 /* @internal */
 239 export function decodeUint8Array (arrayPointer: number, free = true): Uint8Array {
 240         const arraySize = getArrayLength(arrayPointer);
 241         const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 8, arraySize);
 242         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 243         // will free the underlying memory when it becomes unreachable instead of copying here.
 244         // Note that doing so may have edge-case interactions with memory resizing (invalidating the buffer).
 245         const actualArray = actualArrayViewer.slice(0, arraySize);
 246         if (free) {
 247                 wasm.TS_free(arrayPointer);
 248         }
 249         return actualArray;
 250 }
 251 const decodeUint32Array = (arrayPointer: number, free = true) => {
 252         const arraySize = getArrayLength(arrayPointer);
 253         const actualArrayViewer = new Uint32Array(
 254                 wasm.memory.buffer, // value
 255                 arrayPointer + 8, // offset (ignoring length bytes)
 256                 arraySize // uint32 count
 257         );
 258         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 259         // will free the underlying memory when it becomes unreachable instead of copying here.
 260         const actualArray = actualArrayViewer.slice(0, arraySize);
 261         if (free) {
 262                 wasm.TS_free(arrayPointer);
 263         }
 264         return actualArray;
 265 }
 266 /* @internal */
 267 export function decodeUint64Array (arrayPointer: number, free = true): bigint[] {
 268         const arraySize = getArrayLength(arrayPointer);
 269         const actualArrayViewer = new BigUint64Array(
 270                 wasm.memory.buffer, // value
 271                 arrayPointer + 8, // offset (ignoring length bytes)
 272                 arraySize // uint32 count
 273         );
 274         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 275         // will free the underlying memory when it becomes unreachable instead of copying here.
 276         const actualArray = new Array(arraySize);
 277         for (var i = 0; i < arraySize; i++) actualArray[i] = actualArrayViewer[i];
 278         if (free) {
 279                 wasm.TS_free(arrayPointer);
 280         }
 281         return actualArray;
 282 }
 283
 284 export function freeWasmMemory(pointer: number) { wasm.TS_free(pointer); }
 285
 286 /* @internal */
 287 export function getU64ArrayElem(arrayPointer: number, idx: number): bigint {
 288         const actualArrayViewer = new BigUint64Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
 289         return actualArrayViewer[idx]!;
 290 }
 291
 292 /* @internal */
 293 export function getU32ArrayElem(arrayPointer: number, idx: number): number {
 294         const actualArrayViewer = new Uint32Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
 295         return actualArrayViewer[idx]!;
 296 }
 297
 298 /* @internal */
 299 export function getU8ArrayElem(arrayPointer: number, idx: number): number {
 300         const actualArrayViewer = new Uint8Array(wasm.memory.buffer, arrayPointer + 8, idx + 1);
 301         return actualArrayViewer[idx]!;
 302 }
 303
 304
 305 /* @internal */
 306 export function encodeString(str: string): number {
 307         const charArray = new TextEncoder().encode(str);
 308         return encodeUint8Array(charArray);
 309 }
 310
 311 /* @internal */
 312 export function decodeString(stringPointer: number, free = true): string {
 313         const arraySize = getArrayLength(stringPointer);
 314         const memoryView = new Uint8Array(wasm.memory.buffer, stringPointer + 8, arraySize);
 315         const result = new TextDecoder("utf-8").decode(memoryView);
 316
 317         if (free) {
 318                 wasm.TS_free(stringPointer);
 319         }
 320
 321         return result;
 322 }
 323 """
 324         if DEBUG:
 325             self.bindings_header += """
 326 /* @internal */
 327 export function getRemainingAllocationCount(): number {
 328         return wasm.TS_allocs_remaining();
 329 }
 330 /* @internal */
 331 export function debugPrintRemainingAllocs() {
 332         wasm.TS_print_leaks();
 333 }
 334 """
 335         else:
 336             self.bindings_header += "\n/* @internal */ export function getRemainingAllocationCount(): number { return 0; }\n"
 337             self.bindings_header += "/* @internal */ export function debugPrintRemainingAllocs() { }\n"
 338
 339         with open(outdir + "/index.mts", 'a') as index:
 340             index.write("""import { initializeWasmFetch, initializeWasmFromUint8Array } from './bindings.mjs';
 341 /** Initializes the WASM backend by calling `fetch()` on the given URI - Browser only */
 342 export async function initializeWasmWebFetch(uri: string) {
 343         await initializeWasmFetch(uri);
 344 }
 345 /** Initializes the WASM backend given a Uint8Array of the .wasm binary file - Browser or Node.JS */
 346 export async function initializeWasmFromBinary(bin: Uint8Array) {
 347         await initializeWasmFromUint8Array(bin);
 348 }
 349
 350 """)
 351
 352         self.bindings_version_file = """export function get_ldk_java_bindings_version(): String {
 353         return "<git_version_ldk_garbagecollected>";
 354 }"""
 355
 356         self.common_base = """
 357 function freer(f: () => void) { f() }
 358 const finalizer = new FinalizationRegistry(freer);
 359 function get_freeer(ptr: bigint, free_fn: (ptr: bigint) => void) {
 360         return () => {
 361                 free_fn(ptr);
 362         }
 363 }
 364
 365 export class CommonBase {
 366         protected ptr: bigint;
 367         protected ptrs_to: object[] = [];
 368         protected constructor(ptr: bigint, free_fn: (ptr: bigint) => void) {
 369                 this.ptr = ptr;
 370                 if (ptr != 0n){
 371                         finalizer.register(this, get_freeer(ptr, free_fn), this);
 372                 }
 373         }
 374         // In Java, protected means "any subclass can access fields on any other subclass'"
 375         // In TypeScript, protected means "any subclass can access parent fields on instances of itself"
 376         // To work around this, we add accessors for other instances' protected fields here.
 377         protected static add_ref_from(holder: CommonBase|null, referent: object|null) {
 378                 if (holder !== null && referent !== null) { holder.ptrs_to.push(referent); }
 379         }
 380         protected static get_ptr_of(o: CommonBase) {
 381                 return o.ptr;
 382         }
 383         protected static set_null_skip_free(o: CommonBase) {
 384                 o.ptr = 0n;
 385                 // @ts-ignore TypeScript is wrong about the returnvalue of unregister here!
 386                 const did_unregister: boolean = finalizer.unregister(o);
 387                 if (!did_unregister)
 388                         throw new Error("FinalizationRegistry unregister should always unregister unless you double-free'd");
 389         }
 390 }
 391
 392 export class UInt5 {
 393         public constructor(private val: number) {
 394                 if (val > 32 || val < 0) throw new Error("UInt5 value is out of range");
 395         }
 396         public getVal(): number {
 397                 return this.val;
 398         }
 399 }
 400
 401 export class WitnessVersion {
 402         public constructor(private val: number) {
 403                 if (val > 16 || val < 0) throw new Error("WitnessVersion value is out of range");
 404         }
 405         public getVal(): number {
 406                 return this.val;
 407         }
 408 }
 409
 410 export class UnqualifiedError {
 411         public constructor(_val: number) {}
 412 }
 413 """
 414
 415         self.txout_defn = """export class TxOut extends CommonBase {
 416         /** The script_pubkey in this output */
 417         public script_pubkey: Uint8Array;
 418         /** The value, in satoshis, of this output */
 419         public value: bigint;
 420
 421         /* @internal */
 422         public constructor(_dummy: null, ptr: bigint) {
 423                 super(ptr, bindings.TxOut_free);
 424                 this.script_pubkey = bindings.decodeUint8Array(bindings.TxOut_get_script_pubkey(ptr));
 425                 this.value = bindings.TxOut_get_value(ptr);
 426         }
 427         public static constructor_new(value: bigint, script_pubkey: Uint8Array): TxOut {
 428                 return new TxOut(null, bindings.TxOut_new(bindings.encodeUint8Array(script_pubkey), value));
 429         }
 430 }"""
 431         self.obj_defined(["TxOut"], "structs")
 432
 433         self.scalar_defn = """export class BigEndianScalar extends CommonBase {
 434         /** The bytes of the scalar value, in big endian */
 435         public scalar_bytes: Uint8Array;
 436
 437         /* @internal */
 438         public constructor(_dummy: null, ptr: bigint) {
 439                 super(ptr, bindings.BigEndianScalar_free);
 440                 this.scalar_bytes = bindings.decodeUint8Array(bindings.BigEndianScalar_get_bytes(ptr));
 441         }
 442         public static constructor_new(scalar_bytes: Uint8Array): BigEndianScalar {
 443                 return new BigEndianScalar(null, bindings.BigEndianScalar_new(bindings.encodeUint8Array(scalar_bytes)));
 444         }
 445 }"""
 446         self.obj_defined(["BigEndianScalar"], "structs")
 447
 448         self.c_file_pfx = """#include "js-wasm.h"
 449 #include <stdatomic.h>
 450 #include <lightning.h>
 451
 452 // These should be provided...somehow...
 453 void *memset(void *s, int c, size_t n);
 454 void *memcpy(void *dest, const void *src, size_t n);
 455 int memcmp(const void *s1, const void *s2, size_t n);
 456
 457 extern void __attribute__((noreturn)) abort(void);
 458 static inline void assert(bool expression) {
 459         if (!expression) { abort(); }
 460 }
 461
 462 uint32_t __attribute__((export_name("test_bigint_pass_deadbeef0badf00d"))) test_bigint_pass_deadbeef0badf00d(uint64_t val) {
 463         return val == 0xdeadbeef0badf00dULL;
 464 }
 465
 466 """
 467
 468         if not DEBUG:
 469             self.c_file_pfx += """
 470 void *malloc(size_t size);
 471 void free(void *ptr);
 472
 473 #define MALLOC(a, _) malloc(a)
 474 #define do_MALLOC(a, _b, _c) malloc(a)
 475 #define FREE(p) if ((unsigned long)(p) > 4096) { free(p); }
 476 #define DO_ASSERT(a) (void)(a)
 477 #define CHECK(a)
 478 #define CHECK_ACCESS(p)
 479 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v)
 480 """
 481         else:
 482             self.c_file_pfx += """
 483 extern int snprintf(char *str, size_t size, const char *format, ...);
 484 typedef int32_t ssize_t;
 485 ssize_t write(int fd, const void *buf, size_t count);
 486 #define DEBUG_PRINT(...) do { \\
 487         char debug_str[1024]; \\
 488         int s_len = snprintf(debug_str, 1023, __VA_ARGS__); \\
 489         write(2, debug_str, s_len); \\
 490 } while (0);
 491
 492 // Always run a, then assert it is true:
 493 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 494 // Assert a is true or do nothing
 495 #define CHECK(a) DO_ASSERT(a)
 496
 497 // Running a leak check across all the allocations and frees of the JDK is a mess,
 498 // so instead we implement our own naive leak checker here, relying on the -wrap
 499 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 500 // and free'd in Rust or C across the generated bindings shared library.
 501
 502 #define BT_MAX 128
 503 typedef struct allocation {
 504         struct allocation* next;
 505         void* ptr;
 506         const char* struct_name;
 507         int lineno;
 508 } allocation;
 509 static allocation* allocation_ll = NULL;
 510 static allocation* freed_ll = NULL;
 511
 512 extern void* __real_malloc(size_t len);
 513 extern void* __real_calloc(size_t nmemb, size_t len);
 514 extern void* __real_aligned_alloc(size_t alignment, size_t size);
 515 static void new_allocation(void* res, const char* struct_name, int lineno) {
 516         allocation* new_alloc = __real_malloc(sizeof(allocation));
 517         new_alloc->ptr = res;
 518         new_alloc->struct_name = struct_name;
 519         new_alloc->next = allocation_ll;
 520         new_alloc->lineno = lineno;
 521         allocation_ll = new_alloc;
 522 }
 523 static void* do_MALLOC(size_t len, const char* struct_name, int lineno) {
 524         void* res = __real_malloc(len);
 525         new_allocation(res, struct_name, lineno);
 526         return res;
 527 }
 528 #define MALLOC(len, struct_name) do_MALLOC(len, struct_name, __LINE__)
 529
 530 void __real_free(void* ptr);
 531 static void alloc_freed(void* ptr, int lineno) {
 532         allocation* p = NULL;
 533         allocation* it = allocation_ll;
 534         while (it->ptr != ptr) {
 535                 p = it; it = it->next;
 536                 if (it == NULL) {
 537                         p = NULL;
 538                         it = freed_ll;
 539                         while (it && it->ptr != ptr) { p = it; it = it->next; }
 540                         if (it == NULL) {
 541                                 DEBUG_PRINT("Tried to free unknown pointer %p at line %d.\\n", ptr, lineno);
 542                         } else {
 543                                 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);
 544                         }
 545                         abort();
 546                 }
 547         }
 548         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 549         DO_ASSERT(it->ptr == ptr);
 550         it->next = freed_ll;
 551         freed_ll = it;
 552 }
 553 static void do_FREE(void* ptr, int lineno) {
 554         if ((unsigned long)ptr <= 4096) return; // Rust loves to create pointers to the NULL page for dummys
 555         alloc_freed(ptr, lineno);
 556         __real_free(ptr);
 557 }
 558 #define FREE(ptr) do_FREE(ptr, __LINE__)
 559
 560 static void CHECK_ACCESS(const void* ptr) {
 561         allocation* it = allocation_ll;
 562         while (it->ptr != ptr) {
 563                 it = it->next;
 564                 if (it == NULL) {
 565                         return; // addrsan should catch malloc-unknown and print more info than we have
 566                 }
 567         }
 568 }
 569 #define CHECK_INNER_FIELD_ACCESS_OR_NULL(v) \\
 570         if (v.is_owned && v.inner != NULL) { \\
 571                 const void *p = __unmangle_inner_ptr(v.inner); \\
 572                 if (p != NULL) { \\
 573                         CHECK_ACCESS(p); \\
 574                 } \\
 575         }
 576
 577 void* __wrap_malloc(size_t len) {
 578         void* res = __real_malloc(len);
 579         new_allocation(res, "malloc call", 0);
 580         return res;
 581 }
 582 void* __wrap_calloc(size_t nmemb, size_t len) {
 583         void* res = __real_calloc(nmemb, len);
 584         new_allocation(res, "calloc call", 0);
 585         return res;
 586 }
 587 void* __wrap_aligned_alloc(size_t alignment, size_t size) {
 588         void* res = __real_aligned_alloc(alignment, size);
 589         new_allocation(res, "aligned_alloc call", 0);
 590         return res;
 591 }
 592 void __wrap_free(void* ptr) {
 593         if (ptr == NULL) return;
 594         alloc_freed(ptr, 0);
 595         __real_free(ptr);
 596 }
 597
 598 void* __real_realloc(void* ptr, size_t newlen);
 599 void* __wrap_realloc(void* ptr, size_t len) {
 600         if (ptr != NULL) alloc_freed(ptr, 0);
 601         void* res = __real_realloc(ptr, len);
 602         new_allocation(res, "realloc call", 0);
 603         return res;
 604 }
 605 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 606         // Rust doesn't seem to use reallocarray currently
 607         DO_ASSERT(false);
 608 }
 609
 610 uint32_t __attribute__((export_name("TS_allocs_remaining"))) allocs_remaining() {
 611         uint32_t count = 0;
 612         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 613                 count++;
 614         }
 615         return count;
 616 }
 617 void __attribute__((export_name("TS_print_leaks"))) print_leaks() {
 618         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 619                 DEBUG_PRINT("%s %p remains. Allocated on line %d\\n", a->struct_name, a->ptr, a->lineno);
 620         }
 621 }
 622 """
 623         self.c_file_pfx = self.c_file_pfx + """
 624 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 625 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 626 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 627 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 628
 629 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 630
 631 #define DECL_ARR_TYPE(ty, name) \\
 632         struct name##array { \\
 633                 uint64_t arr_len; /* uint32_t would suffice but we want to align uint64_ts as well */ \\
 634                 ty elems[]; \\
 635         }; \\
 636         typedef struct name##array * name##Array; \\
 637         static inline name##Array init_##name##Array(size_t arr_len, int lineno) { \\
 638                 name##Array arr = (name##Array)do_MALLOC(arr_len * sizeof(ty) + sizeof(uint64_t), #name" array init", lineno); \\
 639                 arr->arr_len = arr_len; \\
 640                 return arr; \\
 641         }
 642
 643 DECL_ARR_TYPE(int64_t, int64_t);
 644 DECL_ARR_TYPE(uint64_t, uint64_t);
 645 DECL_ARR_TYPE(int8_t, int8_t);
 646 DECL_ARR_TYPE(uint32_t, uint32_t);
 647 DECL_ARR_TYPE(void*, ptr);
 648 DECL_ARR_TYPE(char, char);
 649 typedef charArray jstring;
 650
 651 static inline jstring str_ref_to_ts(const char* chars, size_t len) {
 652         charArray arr = init_charArray(len, __LINE__);
 653         memcpy(arr->elems, chars, len);
 654         return arr;
 655 }
 656 static inline LDKStr str_ref_to_owned_c(const jstring str) {
 657         char* newchars = MALLOC(str->arr_len + 1, "String chars");
 658         memcpy(newchars, str->elems, str->arr_len);
 659         newchars[str->arr_len] = 0;
 660         LDKStr res = {
 661                 .chars = newchars,
 662                 .len = str->arr_len,
 663                 .chars_is_owned = true
 664         };
 665         return res;
 666 }
 667
 668 typedef bool jboolean;
 669
 670 uint32_t __attribute__((export_name("TS_malloc"))) TS_malloc(uint32_t size) {
 671         return (uint32_t)MALLOC(size, "JS-Called malloc");
 672 }
 673 void __attribute__((export_name("TS_free"))) TS_free(uint32_t ptr) {
 674         FREE((void*)ptr);
 675 }
 676
 677 jstring __attribute__((export_name("TS_get_ldk_c_bindings_version"))) TS_get_ldk_c_bindings_version() {
 678         const char *res = check_get_ldk_bindings_version();
 679         if (res == NULL) return NULL;
 680         return str_ref_to_ts(res, strlen(res));
 681 }
 682 jstring __attribute__((export_name("TS_get_ldk_version"))) get_ldk_version() {
 683         const char *res = check_get_ldk_version();
 684         if (res == NULL) return NULL;
 685         return str_ref_to_ts(res, strlen(res));
 686 }
 687 #include "version.c"
 688 """
 689
 690         self.c_version_file = """jstring __attribute__((export_name("TS_get_lib_version_string"))) TS_get_lib_version_string() {
 691         return str_ref_to_ts("<git_version_ldk_garbagecollected>", strlen("<git_version_ldk_garbagecollected>"));
 692 }"""
 693
 694         self.hu_struct_file_prefix = """
 695 import { CommonBase, UInt5, WitnessVersion, UnqualifiedError } from './CommonBase.mjs';
 696 import * as bindings from '../bindings.mjs'
 697
 698 """
 699         self.hu_struct_file_suffix = ""
 700         self.util_fn_pfx = self.hu_struct_file_prefix + "\nexport class UtilMethods extends CommonBase {\n"
 701         self.util_fn_sfx = "}"
 702         self.c_fn_ty_pfx = ""
 703         self.file_ext = ".mts"
 704         self.ptr_c_ty = "uint64_t"
 705         self.ptr_native_ty = "bigint"
 706         self.u128_native_ty = "bigint"
 707         self.usize_c_ty = "uint32_t"
 708         self.usize_native_ty = "number"
 709         self.native_zero_ptr = "0n"
 710         self.result_c_ty = "uint32_t"
 711         self.ptr_arr = "ptrArray"
 712         self.is_arr_some_check = ("", " != 0")
 713         self.get_native_arr_len_call = ("", "->arr_len")
 714
 715     def bindings_footer(self):
 716         return ""
 717
 718     def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
 719         return None
 720     def create_native_arr_call(self, arr_len, ty_info):
 721         if ty_info.c_ty == "ptrArray":
 722             assert ty_info.rust_obj == "LDKCVec_U5Z" or (ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array"))
 723         return "init_" + ty_info.c_ty + "(" + arr_len + ", __LINE__)"
 724     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 725         if ty_info.c_ty == "int8_tArray":
 726             return ("memcpy(" + arr_name + "->elems, ", ", " + arr_len + ")")
 727         else:
 728             assert False
 729     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 730         if ty_info.c_ty == "int8_tArray":
 731             if copy:
 732                 return "memcpy(" + dest_name + ", " + arr_name + "->elems, " + arr_len + "); FREE(" + arr_name + ")"
 733         assert not copy
 734         if ty_info.c_ty == "ptrArray":
 735             return "(void*) " + arr_name + "->elems"
 736         else:
 737             return arr_name + "->elems"
 738     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 739         assert False # Only called if above is None
 740     def get_native_arr_ptr_call(self, ty_info):
 741         if ty_info.subty is not None:
 742             return "(" + ty_info.subty.c_ty + "*)(((uint8_t*)", ") + 8)"
 743         return "(" + ty_info.c_ty + "*)(((uint8_t*)", ") + 8)"
 744     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
 745         return None
 746     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 747         if ty_info.c_ty == "int8_tArray":
 748             return "FREE(" + arr_name + ");"
 749         else:
 750             return "FREE(" + arr_name + ")"
 751
 752     def map_hu_array_elems(self, arr_name, conv_name, arr_ty, elem_ty):
 753         if elem_ty.rust_obj == "LDKU5":
 754             return arr_name + " != null ? bindings.uint5ArrToBytes(" + arr_name + ") : null"
 755         assert elem_ty.c_ty == "uint64_t" or elem_ty.c_ty.endswith("Array")
 756         return arr_name + " != null ? " + arr_name + ".map(" + conv_name + " => " + elem_ty.from_hu_conv[0] + ") : null"
 757
 758     def str_ref_to_native_call(self, var_name, str_len):
 759         return "str_ref_to_ts(" + var_name + ", " + str_len + ")"
 760     def str_ref_to_c_call(self, var_name):
 761         return "str_ref_to_owned_c(" + var_name + ")"
 762     def str_to_hu_conv(self, var_name):
 763         return "const " + var_name + "_conv: string = bindings.decodeString(" + var_name + ");"
 764     def str_from_hu_conv(self, var_name):
 765         return ("bindings.encodeString(" + var_name + ")", "")
 766
 767     def c_fn_name_define_pfx(self, fn_name, have_args):
 768         return " __attribute__((export_name(\"TS_" + fn_name + "\"))) TS_" + fn_name + "("
 769
 770     def init_str(self):
 771         return ""
 772
 773     def get_java_arr_len(self, arr_name):
 774         return "bindings.getArrayLength(" + arr_name + ")"
 775     def get_java_arr_elem(self, elem_ty, arr_name, idx):
 776         if elem_ty.c_ty.endswith("Array") or elem_ty.c_ty == "uintptr_t":
 777             return "bindings.getU32ArrayElem(" + arr_name + ", " + idx + ")"
 778         elif elem_ty.c_ty == "uint64_t":
 779             return "bindings.getU64ArrayElem(" + arr_name + ", " + idx + ")"
 780         elif elem_ty.rust_obj == "LDKU5":
 781             return "bindings.getU8ArrayElem(" + arr_name + ", " + idx + ")"
 782         else:
 783             assert False
 784     def constr_hu_array(self, ty_info, arr_len):
 785         return "new Array(" + arr_len + ").fill(null)"
 786     def cleanup_converted_native_array(self, ty_info, arr_name):
 787         return "bindings.freeWasmMemory(" + arr_name + ")"
 788
 789     def primitive_arr_from_hu(self, arr_ty, fixed_len, arr_name):
 790         mapped_ty = arr_ty.subty
 791         inner = arr_name
 792         if arr_ty.rust_obj == "LDKU128":
 793             return ("bindings.encodeUint128(" + inner + ")", "")
 794         if fixed_len is not None:
 795             assert mapped_ty.c_ty == "int8_t"
 796             inner = "bindings.check_arr_len(" + arr_name + ", " + fixed_len + ")"
 797         if mapped_ty.c_ty.endswith("Array"):
 798             return ("bindings.encodeUint32Array(" + inner + ")", "")
 799         elif mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t":
 800             return ("bindings.encodeUint8Array(" + inner + ")", "")
 801         elif mapped_ty.c_ty == "uint32_t":
 802             return ("bindings.encodeUint32Array(" + inner + ")", "")
 803         elif mapped_ty.c_ty == "int64_t" or mapped_ty.c_ty == "uint64_t":
 804             return ("bindings.encodeUint64Array(" + inner + ")", "")
 805         else:
 806             print(mapped_ty.c_ty)
 807             assert False
 808
 809     def primitive_arr_to_hu(self, arr_ty, fixed_len, arr_name, conv_name):
 810         mapped_ty = arr_ty.subty
 811         if arr_ty.rust_obj == "LDKU128":
 812             return "const " + conv_name + ": bigint = bindings.decodeUint128(" + arr_name + ");"
 813         elif mapped_ty.c_ty == "uint8_t" or mapped_ty.c_ty == "int8_t":
 814             return "const " + conv_name + ": Uint8Array = bindings.decodeUint8Array(" + arr_name + ");"
 815         elif mapped_ty.c_ty == "uint64_t" or mapped_ty.c_ty == "int64_t":
 816             return "const " + conv_name + ": bigint[] = bindings.decodeUint64Array(" + arr_name + ");"
 817         else:
 818             assert False
 819
 820     def var_decl_statement(self, ty_string, var_name, statement):
 821         return "const " + var_name + ": " + ty_string + " = " + statement
 822
 823     def java_arr_ty_str(self, elem_ty_str):
 824         return "number"
 825
 826     def for_n_in_range(self, n, minimum, maximum):
 827         return "for (var " + n + " = " + minimum + "; " + n + " < " + maximum + "; " + n + "++) {"
 828     def for_n_in_arr(self, n, arr_name, arr_elem_ty):
 829         return (arr_name + ".forEach((" + n + ": " + arr_elem_ty.java_hu_ty + ") => { ", " })")
 830
 831     def get_ptr(self, var):
 832         return "CommonBase.get_ptr_of(" + var + ")"
 833     def set_null_skip_free(self, var):
 834         return "CommonBase.set_null_skip_free(" + var + ");"
 835
 836     def add_ref(self, holder, referent):
 837         return "CommonBase.add_ref_from(" + holder + ", " + referent + ")"
 838
 839     def obj_defined(self, struct_names, folder):
 840         with open(self.outdir + "/index.mts", 'a') as index:
 841             index.write(f"export * from './{folder}/{struct_names[0]}.mjs';\n")
 842         with open(self.outdir + "/imports.mts.part", 'a') as imports:
 843             imports.write(f"import {{ {', '.join(struct_names)} }} from '../{folder}/{struct_names[0]}.mjs';\n")
 844
 845     def fully_qualified_hu_ty_path(self, ty):
 846         return ty.java_hu_ty
 847
 848     def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
 849         out_c = "static inline LDK" + struct_name + " LDK" + struct_name + "_from_js(int32_t ord) {\n"
 850         out_c = out_c + "\tswitch (ord) {\n"
 851         ord_v = 0
 852
 853         out_typescript_enum_fields = ""
 854
 855         for var, var_docs in variants:
 856             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 857             ord_v = ord_v + 1
 858             if var_docs is not None:
 859                 var_docs_repld = var_docs.replace("\n", "\n\t")
 860                 out_typescript_enum_fields += f"/**\n\t * {var_docs_repld}\n\t */\n"
 861             out_typescript_enum_fields += f"\t{var},\n\t"
 862         out_c = out_c + "\t}\n"
 863         out_c = out_c + "\tabort();\n"
 864         out_c = out_c + "}\n"
 865
 866         out_c = out_c + "static inline int32_t LDK" + struct_name + "_to_js(LDK" + struct_name + " val) {\n"
 867         out_c = out_c + "\tswitch (val) {\n"
 868         ord_v = 0
 869         for var, _ in variants:
 870             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 871             ord_v = ord_v + 1
 872         out_c = out_c + "\t\tdefault: abort();\n"
 873         out_c = out_c + "\t}\n"
 874         out_c = out_c + "}\n"
 875
 876         # Note that this is *not* marked /* @internal */ as we re-expose it directly in enums/
 877         enum_comment_formatted = enum_doc_comment.replace("\n", "\n * ")
 878         out_typescript = f"""
 879 /**
 880  * {enum_comment_formatted}
 881  */
 882 export enum {struct_name} {{
 883         {out_typescript_enum_fields}
 884 }}
 885 """
 886         out_typescript_enum = f"export {{ {struct_name} }} from \"../bindings.mjs\";"
 887         self.obj_defined([struct_name], "enums")
 888         return (out_c, out_typescript_enum, out_typescript)
 889
 890     def c_unitary_enum_to_native_call(self, ty_info):
 891         return (ty_info.rust_obj + "_to_js(", ")")
 892     def native_unitary_enum_to_c_call(self, ty_info):
 893         return (ty_info.rust_obj + "_from_js(", ")")
 894
 895     def native_c_map_trait(self, struct_name, field_var_conversions, flattened_field_var_conversions, field_function_lines, trait_doc_comment):
 896         out_typescript_bindings = ""
 897         super_instantiator = ""
 898         bindings_instantiator = ""
 899         pointer_to_adder = ""
 900         impl_constructor_arguments = ""
 901         for var in flattened_field_var_conversions:
 902             if isinstance(var, ConvInfo):
 903                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 904                 super_instantiator += first_to_lower(var.arg_name) + ", "
 905                 if var.from_hu_conv is not None:
 906                     bindings_instantiator += ", " + var.from_hu_conv[0]
 907                     if var.from_hu_conv[1] != "":
 908                         pointer_to_adder += "\t\t\t" + var.from_hu_conv[1] + ";\n"
 909                 else:
 910                     bindings_instantiator += ", " + first_to_lower(var.arg_name)
 911             else:
 912                 bindings_instantiator += ", " + first_to_lower(var[1]) + ".instance_idx!"
 913                 super_instantiator += first_to_lower(var[1]) + "_impl, "
 914                 pointer_to_adder += "\t\timpl_holder.held.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 915                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}Interface"
 916
 917         super_constructor_statements = ""
 918         trait_constructor_arguments = ""
 919         for var in field_var_conversions:
 920             if isinstance(var, ConvInfo):
 921                 trait_constructor_arguments += ", " + var.arg_name
 922             else:
 923                 super_constructor_statements += "\t\tconst " + first_to_lower(var[1]) + " = " + var[1] + ".new_impl(" + super_instantiator + ");\n"
 924                 trait_constructor_arguments += ", " + first_to_lower(var[1]) + ".instance_idx!"
 925                 for suparg in var[2]:
 926                     if isinstance(suparg, ConvInfo):
 927                         trait_constructor_arguments += ", " + suparg.arg_name
 928                     else:
 929                         trait_constructor_arguments += ", " + suparg[1]
 930
 931         # BUILD INTERFACE METHODS
 932         out_java_interface = ""
 933         out_interface_implementation_overrides = ""
 934         java_methods = []
 935         for fn_line in field_function_lines:
 936             java_method_descriptor = ""
 937             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 938                 out_java_interface += "\t/**" + fn_line.docs.replace("\n", "\n\t * ") + "\n\t */\n"
 939                 out_java_interface += "\t" + fn_line.fn_name + "("
 940                 out_interface_implementation_overrides += f"\t\t\t{fn_line.fn_name} ("
 941
 942                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 943                     if idx >= 1:
 944                         out_java_interface += ", "
 945                         out_interface_implementation_overrides += ", "
 946                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 947                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 948                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 949                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n"
 950                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 951                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 952
 953                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 954
 955                 for arg_info in fn_line.args_ty:
 956                     if arg_info.to_hu_conv is not None:
 957                         out_interface_implementation_overrides += "\t\t\t\t" + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 958
 959                 if fn_line.ret_ty_info.java_ty != "void":
 960                     out_interface_implementation_overrides += "\t\t\t\tconst ret: " + fn_line.ret_ty_info.java_hu_ty + " = arg." + fn_line.fn_name + "("
 961                 else:
 962                     out_interface_implementation_overrides += f"\t\t\t\targ." + fn_line.fn_name + "("
 963
 964                 for idx, arg_info in enumerate(fn_line.args_ty):
 965                     if idx != 0:
 966                         out_interface_implementation_overrides += ", "
 967                     if arg_info.to_hu_conv_name is not None:
 968                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 969                     else:
 970                         out_interface_implementation_overrides += arg_info.arg_name
 971
 972                 out_interface_implementation_overrides += ");\n"
 973                 if fn_line.ret_ty_info.java_ty != "void":
 974                     if fn_line.ret_ty_info.from_hu_conv is not None:
 975                         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"
 976                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 977                             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"
 978                         #if fn_line.ret_ty_info.rust_obj in result_types:
 979                         # XXX: We need to handle this in conversion logic so that its cross-language!
 980                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 981                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 982                         out_interface_implementation_overrides += "\t\t\t\treturn result;\n"
 983                     else:
 984                         out_interface_implementation_overrides += "\t\t\t\treturn ret;\n"
 985                 out_interface_implementation_overrides += f"\t\t\t}},\n"
 986
 987         formatted_trait_docs = trait_doc_comment.replace("\n", "\n * ")
 988         out_typescript_human = f"""
 989 {self.hu_struct_file_prefix}
 990
 991 /** An implementation of {struct_name.replace("LDK","")} */
 992 export interface {struct_name.replace("LDK", "")}Interface {{
 993 {out_java_interface}}}
 994
 995 class {struct_name}Holder {{
 996         held: {struct_name.replace("LDK", "")}|null = null;
 997 }}
 998
 999 /**
1000  * {formatted_trait_docs}
1001  */
1002 export class {struct_name.replace("LDK","")} extends CommonBase {{
1003         /* @internal */
1004         public bindings_instance: bindings.{struct_name}|null;
1005
1006         /* @internal */
1007         public instance_idx?: number;
1008
1009         /* @internal */
1010         constructor(_dummy: null, ptr: bigint) {{
1011                 super(ptr, bindings.{struct_name.replace("LDK","")}_free);
1012                 this.bindings_instance = null;
1013         }}
1014
1015         /** Creates a new instance of {struct_name.replace("LDK","")} from a given implementation */
1016         public static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
1017                 const impl_holder: {struct_name}Holder = new {struct_name}Holder();
1018                 let structImplementation = {{
1019 {out_interface_implementation_overrides}                }} as bindings.{struct_name};
1020 {super_constructor_statements}          const ptr_idx: [bigint, number] = bindings.{struct_name}_new(structImplementation{bindings_instantiator});
1021
1022                 impl_holder.held = new {struct_name.replace("LDK", "")}(null, ptr_idx[0]);
1023                 impl_holder.held.instance_idx = ptr_idx[1];
1024                 impl_holder.held.bindings_instance = structImplementation;
1025 {pointer_to_adder}              return impl_holder.held!;
1026         }}
1027
1028 """
1029         self.obj_defined([struct_name.replace("LDK", ""), struct_name.replace("LDK", "") + "Interface"], "structs")
1030
1031         out_typescript_bindings += "/* @internal */\nexport interface " + struct_name + " {\n"
1032         java_meths = []
1033         for fn_line in field_function_lines:
1034             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
1035                 out_typescript_bindings += f"\t{fn_line.fn_name} ("
1036
1037                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
1038                     if idx >= 1:
1039                         out_typescript_bindings = out_typescript_bindings + ", "
1040                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
1041
1042                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
1043
1044         out_typescript_bindings += "}\n\n"
1045
1046         c_call_extra_args = ""
1047         out_typescript_bindings += f"/* @internal */\nexport function {struct_name}_new(impl: {struct_name}"
1048         for var in flattened_field_var_conversions:
1049             if isinstance(var, ConvInfo):
1050                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
1051                 c_call_extra_args += f", {var.arg_name}"
1052             else:
1053                 out_typescript_bindings += f", {var[1]}: number"
1054                 c_call_extra_args += f", {var[1]}"
1055
1056
1057         out_typescript_bindings += f"""): [bigint, number] {{
1058         if(!isWasmInitialized) {{
1059                 throw new Error("initializeWasm() must be awaited first!");
1060         }}
1061         var new_obj_idx = js_objs.length;
1062         for (var i = 0; i < js_objs.length; i++) {{
1063                 if (js_objs[i] == null || js_objs[i] == undefined) {{ new_obj_idx = i; break; }}
1064         }}
1065         js_objs[i] = new WeakRef(impl);
1066         return [wasm.TS_{struct_name}_new(i{c_call_extra_args}), i];
1067 }}
1068 """
1069
1070         # Now that we've written out our java code (and created java_meths), generate C
1071         out_c = "typedef struct " + struct_name + "_JCalls {\n"
1072         out_c += "\tatomic_size_t refcnt;\n"
1073         out_c += "\tuint32_t instance_ptr;\n"
1074         for var in flattened_field_var_conversions:
1075             if isinstance(var, ConvInfo):
1076                 # We're a regular ol' field
1077                 pass
1078             else:
1079                 # We're a supertrait
1080                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
1081         out_c = out_c + "} " + struct_name + "_JCalls;\n"
1082
1083         for fn_line in field_function_lines:
1084             if fn_line.fn_name == "free":
1085                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
1086                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
1087                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
1088                 out_c = out_c + "\t\tFREE(j_calls);\n"
1089                 out_c = out_c + "\t}\n}\n"
1090
1091         for idx, fn_line in enumerate(field_function_lines):
1092             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
1093                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
1094                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
1095                 if fn_line.self_is_const:
1096                     out_c = out_c + "const void* this_arg"
1097                 else:
1098                     out_c = out_c + "void* this_arg"
1099
1100                 for idx, arg in enumerate(fn_line.args_ty):
1101                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
1102
1103                 out_c = out_c + ") {\n"
1104                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
1105
1106                 for arg_info in fn_line.args_ty:
1107                     if arg_info.ret_conv is not None:
1108                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
1109                         out_c = out_c + arg_info.arg_name
1110                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
1111
1112                 fn_suffix = ""
1113                 assert len(fn_line.args_ty) < 7
1114                 for arg_info in fn_line.args_ty:
1115                     if arg_info.c_ty == "uint64_t" or arg_info.c_ty == "int64_t":
1116                         fn_suffix += "b"
1117                     else:
1118                         fn_suffix += "u"
1119                 for i in range(0, 6 - len(fn_line.args_ty)):
1120                     fn_suffix += "u"
1121                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
1122                     out_c += "\t" + fn_line.ret_ty_info.c_ty + " ret = (" + fn_line.ret_ty_info.c_ty + ")"
1123                     out_c += "js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
1124                 elif fn_line.ret_ty_info.java_ty == "void":
1125                     out_c = out_c + "\tjs_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
1126                 elif fn_line.ret_ty_info.java_hu_ty == "string":
1127                     out_c += "\tjstring ret = (jstring)js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
1128                 elif fn_line.ret_ty_info.arg_conv is None:
1129                     out_c += "\treturn js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
1130                 else:
1131                     out_c += "\tuint64_t ret = js_invoke_function_" + fn_suffix + "(j_calls->instance_ptr, " + str(self.function_ptr_counter)
1132
1133                 self.function_ptrs[self.function_ptr_counter] = (struct_name, fn_line.fn_name)
1134                 self.function_ptr_counter += 1
1135
1136                 for idx, arg_info in enumerate(fn_line.args_ty):
1137                     if arg_info.ret_conv is not None:
1138                         if arg_info.c_ty.endswith("Array"):
1139                             out_c += ", (uint32_t)" + arg_info.ret_conv_name
1140                         else:
1141                             out_c += ", " + arg_info.ret_conv_name
1142                     else:
1143                         assert False # TODO: Would we need some conversion here?
1144                         out_c += ", (uint32_t)" + arg_info.arg_name
1145                 for i in range(0, 6 - len(fn_line.args_ty)):
1146                     out_c += ", 0"
1147                 out_c = out_c + ");\n"
1148                 if fn_line.ret_ty_info.arg_conv is not None:
1149                     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"
1150
1151                 out_c = out_c + "}\n"
1152
1153         # Write out a clone function whether we need one or not, as we use them in moving to rust
1154         out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n"
1155         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n"
1156         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
1157         for var in field_var_conversions:
1158             if not isinstance(var, ConvInfo):
1159                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
1160         out_c = out_c + "}\n"
1161
1162         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (JSValue o"
1163         for var in flattened_field_var_conversions:
1164             if isinstance(var, ConvInfo):
1165                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
1166             else:
1167                 out_c = out_c + ", JSValue " + var[1]
1168         out_c = out_c + ") {\n"
1169
1170         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
1171         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
1172         out_c = out_c + "\tcalls->instance_ptr = o;\n"
1173
1174         for (fn_name, java_meth_descr) in java_meths:
1175             if fn_name != "free" and fn_name != "cloned":
1176                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
1177                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
1178
1179         for var in flattened_field_var_conversions:
1180             if isinstance(var, ConvInfo) and var.arg_conv is not None:
1181                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
1182         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
1183         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
1184         for fn_line in field_function_lines:
1185             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
1186                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
1187             elif fn_line.fn_name == "free":
1188                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
1189             else:
1190                 out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n"
1191         for var in field_var_conversions:
1192             if isinstance(var, ConvInfo):
1193                 if var.arg_conv_name is not None:
1194                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
1195                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
1196                 else:
1197                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
1198                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
1199             else:
1200                 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(" + var[1]
1201                 for suparg in var[2]:
1202                     if isinstance(suparg, ConvInfo):
1203                         out_c += ", " + suparg.arg_name
1204                     else:
1205                         out_c += ", " + suparg[1]
1206                 out_c += "),\n"
1207         out_c = out_c + "\t};\n"
1208         for var in flattened_field_var_conversions:
1209             if not isinstance(var, ConvInfo):
1210                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
1211         out_c = out_c + "\treturn ret;\n"
1212         out_c = out_c + "}\n"
1213
1214         out_c = out_c + self.c_fn_ty_pfx + "uint64_t " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "JSValue o"
1215         for var in flattened_field_var_conversions:
1216             if isinstance(var, ConvInfo):
1217                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
1218             else:
1219                 out_c = out_c + ", JSValue " + var[1]
1220         out_c = out_c + ") {\n"
1221         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
1222         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(o"
1223         for var in flattened_field_var_conversions:
1224             if isinstance(var, ConvInfo):
1225                 out_c = out_c + ", " + var.arg_name
1226             else:
1227                 out_c = out_c + ", " + var[1]
1228         out_c = out_c + ");\n"
1229         out_c = out_c + "\treturn tag_ptr(res_ptr, true);\n"
1230         out_c = out_c + "}\n"
1231
1232         return (out_typescript_bindings, out_typescript_human, out_c)
1233
1234     def trait_struct_inc_refcnt(self, ty_info):
1235         base_conv = "\nif (" + ty_info.var_name + "_conv.free == " + ty_info.rust_obj + "_JCalls_free) {\n"
1236         base_conv = base_conv + "\t// If this_arg is a JCalls struct, then we need to increment the refcnt in it.\n"
1237         base_conv = base_conv + "\t" + ty_info.rust_obj + "_JCalls_cloned(&" + ty_info.var_name + "_conv);\n}"
1238         return base_conv
1239
1240     def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
1241         bindings_type = struct_name.replace("LDK", "")
1242         java_hu_type = struct_name.replace("LDK", "").replace("COption", "Option")
1243
1244         out_java_enum = ""
1245         out_java = ""
1246         out_c = ""
1247
1248         out_java_enum += (self.hu_struct_file_prefix)
1249
1250         java_hu_class = "/**\n * " + enum_doc_comment.replace("\n", "\n * ") + "\n */\n"
1251         java_hu_class += "export class " + java_hu_type + " extends CommonBase {\n"
1252         java_hu_class += "\tprotected constructor(_dummy: null, ptr: bigint) { super(ptr, bindings." + bindings_type + "_free); }\n"
1253         java_hu_class += "\t/* @internal */\n"
1254         java_hu_class += f"\tpublic static constr_from_ptr(ptr: bigint): {java_hu_type} {{\n"
1255         java_hu_class += f"\t\tconst raw_ty: number = bindings." + struct_name + "_ty_from_ptr(ptr);\n"
1256         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"
1257         out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)untag_ptr(ptr);\n"
1258         out_c += "\tswitch(obj->tag) {\n"
1259         java_hu_class += "\t\tswitch (raw_ty) {\n"
1260         java_hu_subclasses = ""
1261
1262         out_java += "/* @internal */\nexport class " + struct_name + " {\n"
1263         out_java += "\tprotected constructor() {}\n"
1264         var_idx = 0
1265         for var in variant_list:
1266             java_hu_subclasses += "/** A " + java_hu_type + " of type " + var.var_name + " */\n"
1267             java_hu_subclasses += "export class " + java_hu_type + "_" + var.var_name + " extends " + java_hu_type + " {\n"
1268             java_hu_class += f"\t\t\tcase {var_idx}: "
1269             java_hu_class += "return new " + java_hu_type + "_" + var.var_name + "(ptr);\n"
1270             out_c += f"\t\tcase {struct_name}_{var.var_name}: return {var_idx};\n"
1271             hu_conv_body = ""
1272             for idx, (field_ty, field_docs) in enumerate(var.fields):
1273                 if field_docs is not None:
1274                     java_hu_subclasses += "\t/**\n\t * " + field_docs.replace("\n", "\n\t * ") + "\n\t */\n"
1275                 java_hu_subclasses += "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
1276                 if field_ty.to_hu_conv is not None:
1277                     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"
1278                     hu_conv_body += f"\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
1279                     hu_conv_body += f"\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
1280                 else:
1281                     hu_conv_body += f"\t\tthis.{field_ty.arg_name} = bindings.{struct_name}_{var.var_name}_get_{field_ty.arg_name}(ptr);\n"
1282             java_hu_subclasses += "\t/* @internal */\n"
1283             java_hu_subclasses += "\tpublic constructor(ptr: bigint) {\n\t\tsuper(null, ptr);\n"
1284             java_hu_subclasses = java_hu_subclasses + hu_conv_body
1285             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
1286             var_idx += 1
1287         out_java += "}\n"
1288         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"
1289         out_java += self.fn_call_body(struct_name + "_ty_from_ptr", "uint32_t", "number", "ptr: bigint", "ptr")
1290         out_c += ("\t\tdefault: abort();\n")
1291         out_c += ("\t}\n}\n")
1292
1293         for var in variant_list:
1294             for idx, (field_map, _) in enumerate(var.fields):
1295                 fn_name = f"{struct_name}_{var.var_name}_get_{field_map.arg_name}"
1296                 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"
1297                 out_c += "\t" + struct_name + " *obj = (" + struct_name + "*)untag_ptr(ptr);\n"
1298                 out_c += f"\tassert(obj->tag == {struct_name}_{var.var_name});\n"
1299                 if field_map.ret_conv is not None:
1300                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
1301                     if var.tuple_variant:
1302                         out_c += "obj->" + camel_to_snake(var.var_name)
1303                     else:
1304                         out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
1305                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
1306                     out_c += "\treturn " + field_map.ret_conv_name + ";\n"
1307                 else:
1308                     if var.tuple_variant:
1309                         out_c += "\treturn " + "obj->" + camel_to_snake(var.var_name) + ";\n"
1310                     else:
1311                         out_c += "\treturn " + "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name + ";\n"
1312                 out_c += "}\n"
1313                 out_java += self.fn_call_body(fn_name, field_map.c_ty, field_map.java_ty, "ptr: bigint", "ptr")
1314         out_java_enum += java_hu_class
1315         self.struct_file_suffixes[java_hu_type] = java_hu_subclasses
1316         self.obj_defined([java_hu_type], "structs")
1317         return (out_java, out_java_enum, out_c)
1318
1319     def map_opaque_struct(self, struct_name, struct_doc_comment):
1320         method_header = ""
1321
1322         hu_name = struct_name.replace("LDKC2Tuple", "TwoTuple").replace("LDKC3Tuple", "ThreeTuple").replace("LDK", "")
1323         out_opaque_struct_human = f"{self.hu_struct_file_prefix}"
1324         constructor_body = "super(ptr, bindings." + struct_name.replace("LDK","") + "_free);"
1325         extra_docs = ""
1326         extra_body = ""
1327         if struct_name.startswith("LDKLocked") or struct_name.startswith("LDKReadOnly"):
1328             extra_docs = "\n * This type represents a lock and MUST BE MANUALLY FREE'd!"
1329             constructor_body = 'super(ptr, () => { throw new Error("Locks must be manually freed with free()"); });'
1330             extra_body = f"""
1331         /** Releases this lock */
1332         public free() {{
1333                 bindings.{struct_name.replace("LDK","")}_free(this.ptr);
1334                 CommonBase.set_null_skip_free(this);
1335         }}"""
1336         formatted_doc_comment = struct_doc_comment.replace("\n", "\n * ")
1337         out_opaque_struct_human += f"""
1338 /**{extra_docs}
1339  * {formatted_doc_comment}
1340  */
1341 export class {hu_name} extends CommonBase {{
1342         /* @internal */
1343         public constructor(_dummy: null, ptr: bigint) {{
1344                 {constructor_body}
1345         }}{extra_body}
1346
1347 """
1348         self.obj_defined([hu_name], "structs")
1349         return out_opaque_struct_human
1350
1351     def map_tuple(self, struct_name):
1352         return self.map_opaque_struct(struct_name, "A Tuple")
1353
1354     def map_result(self, struct_name, res_map, err_map):
1355         human_ty = struct_name.replace("LDKCResult", "Result")
1356
1357         suffixes = f"export class {human_ty}_OK extends {human_ty} {{\n"
1358         if res_map.java_hu_ty != "void":
1359             suffixes += "\tpublic res: " + res_map.java_hu_ty + ";\n"
1360         suffixes += f"""
1361         /* @internal */
1362         public constructor(_dummy: null, ptr: bigint) {{
1363                 super(_dummy, ptr);
1364 """
1365         if res_map.java_hu_ty == "void":
1366             pass
1367         elif res_map.to_hu_conv is not None:
1368             suffixes += "\t\tconst res: " + res_map.java_ty + " = bindings." + struct_name.replace("LDK", "") + "_get_ok(ptr);\n"
1369             suffixes += "\t\t" + res_map.to_hu_conv.replace("\n", "\n\t\t")
1370             suffixes += "\n\t\tthis.res = " + res_map.to_hu_conv_name + ";\n"
1371         else:
1372             suffixes += "\t\tthis.res = bindings." + struct_name.replace("LDK", "") + "_get_ok(ptr);\n"
1373         suffixes += "\t}\n}\n"
1374
1375         suffixes += f"export class {human_ty}_Err extends {human_ty} {{\n"
1376         if err_map.java_hu_ty != "void":
1377             suffixes += "\tpublic err: " + err_map.java_hu_ty + ";\n"
1378         suffixes += f"""
1379         /* @internal */
1380         public constructor(_dummy: null, ptr: bigint) {{
1381                 super(_dummy, ptr);
1382 """
1383         if err_map.java_hu_ty == "void":
1384             pass
1385         elif err_map.to_hu_conv is not None:
1386             suffixes += "\t\tconst err: " + err_map.java_ty + " = bindings." + struct_name.replace("LDK", "") + "_get_err(ptr);\n"
1387             suffixes += "\t\t" + err_map.to_hu_conv.replace("\n", "\n\t\t")
1388             suffixes += "\n\t\tthis.err = " + err_map.to_hu_conv_name + ";\n"
1389         else:
1390             suffixes += "\t\tthis.err = bindings." + struct_name.replace("LDK", "") + "_get_err(ptr);\n"
1391         suffixes += "\t}\n}"
1392
1393         self.struct_file_suffixes[human_ty] = suffixes
1394         self.obj_defined([human_ty], "structs")
1395
1396         return f"""{self.hu_struct_file_prefix}
1397
1398 export class {human_ty} extends CommonBase {{
1399         protected constructor(_dummy: null, ptr: bigint) {{
1400                 super(ptr, bindings.{struct_name.replace("LDK","")}_free);
1401         }}
1402         /* @internal */
1403         public static constr_from_ptr(ptr: bigint): {human_ty} {{
1404                 if (bindings.{struct_name.replace("LDK", "")}_is_ok(ptr)) {{
1405                         return new {human_ty}_OK(null, ptr);
1406                 }} else {{
1407                         return new {human_ty}_Err(null, ptr);
1408                 }}
1409         }}
1410 """
1411
1412     def fn_call_body(self, method_name, return_c_ty, return_java_ty, method_argument_string, native_call_argument_string):
1413         has_return_value = return_c_ty != 'void'
1414         return_statement = 'return nativeResponseValue;'
1415         if not has_return_value:
1416             return_statement = '// debug statements here'
1417
1418         return f"""/* @internal */
1419 export function {method_name}({method_argument_string}): {return_java_ty} {{
1420         if(!isWasmInitialized) {{
1421                 throw new Error("initializeWasm() must be awaited first!");
1422         }}
1423         const nativeResponseValue = wasm.TS_{method_name}({native_call_argument_string});
1424         {return_statement}
1425 }}
1426 """
1427     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):
1428         out_java = ""
1429         out_c = ""
1430         out_java_struct = None
1431
1432         out_java += ("\t")
1433         out_c += (self.c_fn_ty_pfx)
1434         out_c += (return_type_info.c_ty)
1435         out_java += (return_type_info.java_ty)
1436         if return_type_info.ret_conv is not None:
1437             ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
1438         out_java += (" " + method_name + "(")
1439         out_c += (" "  + self.c_fn_name_define_pfx(method_name, True))
1440
1441         method_argument_string = ""
1442         native_call_argument_string = ""
1443         for idx, arg_conv_info in enumerate(argument_types):
1444             if idx != 0:
1445                 method_argument_string += (", ")
1446                 native_call_argument_string += ', '
1447                 out_c += (", ")
1448             if arg_conv_info.c_ty != "void":
1449                 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
1450                 method_argument_string += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
1451                 native_call_argument_string += arg_conv_info.arg_name
1452         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)
1453
1454         out_java_struct = ""
1455         if doc_comment is not None:
1456             out_java_struct = "\t/**\n\t * " + doc_comment.replace("\n", "\n\t * ") + "\n\t */\n"
1457
1458         if not args_known:
1459             out_java_struct += ("\t// Skipped " + method_name + "\n")
1460         else:
1461             if not takes_self:
1462                 out_java_struct += (
1463                         "\tpublic static constructor_" + meth_n + "(")
1464             else:
1465                 out_java_struct += ("\tpublic " + meth_n + "(")
1466             for idx, arg in enumerate(argument_types):
1467                 if idx != 0:
1468                     if not takes_self or idx > 1:
1469                         out_java_struct += (", ")
1470                 elif takes_self:
1471                     continue
1472                 if arg.java_ty != "void":
1473                     if arg.arg_name in default_constructor_args:
1474                         for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1475                             if explode_idx != 0:
1476                                 out_java_struct += (", ")
1477                             out_java_struct += arg.arg_name + "_" + explode_arg.arg_name + ": " + explode_arg.java_hu_ty
1478                     else:
1479                         out_java_struct += arg.arg_name + ": " + arg.java_hu_ty
1480                         if arg.nullable:
1481                             out_java_struct += "|null"
1482
1483         out_c += (") {\n")
1484         if out_java_struct is not None:
1485             out_java_struct += "): " + return_type_info.java_hu_ty + " {\n"
1486         for info in argument_types:
1487             if info.arg_conv is not None:
1488                 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1489         if return_type_info.ret_conv is not None:
1490             out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1491         elif return_type_info.c_ty != "void":
1492             out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1493         else:
1494             out_c += ("\t")
1495         if c_call_string is None:
1496             out_c += (method_name + "(")
1497         else:
1498             out_c += (c_call_string)
1499         for idx, info in enumerate(argument_types):
1500             if info.arg_conv_name is not None:
1501                 if idx != 0:
1502                     out_c += (", ")
1503                 elif c_call_string is not None:
1504                     continue
1505                 out_c += (info.arg_conv_name)
1506         out_c += (")")
1507         if return_type_info.ret_conv is not None:
1508             out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1509         else:
1510             out_c += (";")
1511         for info in argument_types:
1512             if info.arg_conv_cleanup is not None:
1513                 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1514         if return_type_info.ret_conv is not None:
1515             out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1516         elif return_type_info.c_ty != "void":
1517             out_c += ("\n\treturn ret_val;")
1518         out_c += ("\n}\n\n")
1519
1520         if args_known:
1521             out_java_struct += ("\t\t")
1522             if return_type_info.java_ty != "void":
1523                 out_java_struct += "const ret: " + return_type_info.java_ty + " = "
1524             out_java_struct += ("bindings." + method_name + "(")
1525             for idx, info in enumerate(argument_types):
1526                 if idx != 0:
1527                     out_java_struct += (", ")
1528                 if idx == 0 and takes_self:
1529                     out_java_struct += ("this.ptr")
1530                 elif info.arg_name in default_constructor_args:
1531                     out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1532                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1533                         if explode_idx != 0:
1534                             out_java_struct += (", ")
1535                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1536                         if explode_arg.from_hu_conv is not None:
1537                             out_java_struct += (
1538                                 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1539                         else:
1540                             out_java_struct += (expl_arg_name)
1541                     out_java_struct += (")")
1542                 elif info.from_hu_conv is not None:
1543                     out_java_struct += (info.from_hu_conv[0])
1544                 else:
1545                     out_java_struct += (info.arg_name)
1546             out_java_struct += (");\n")
1547             if return_type_info.to_hu_conv is not None:
1548                 if not takes_self:
1549                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1550                                                                                                              return_type_info.to_hu_conv_name) + "\n")
1551                 else:
1552                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1553
1554             for idx, info in enumerate(argument_types):
1555                 if idx == 0 and takes_self:
1556                     pass
1557                 elif info.arg_name in default_constructor_args:
1558                     for explode_arg in default_constructor_args[info.arg_name]:
1559                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1560                         if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1561                             out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1562                                                                                              expl_arg_name).replace(
1563                                 "this", return_type_info.to_hu_conv_name) + ";\n")
1564                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1565                     if not takes_self and return_type_info.to_hu_conv_name is not None:
1566                         out_java_struct += (
1567                                 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1568                     else:
1569                         out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1570
1571             if return_type_info.to_hu_conv_name is not None:
1572                 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1573             elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1574                 out_java_struct += ("\t\treturn ret;\n")
1575             out_java_struct += ("\t}\n\n")
1576
1577         return (out_java, out_c, out_java_struct)
1578
1579     def cleanup(self):
1580         for struct in self.struct_file_suffixes:
1581             with open(self.outdir + "/structs/" + struct + self.file_ext, "a") as src:
1582                 src.write(self.struct_file_suffixes[struct])
1583
1584         with open(self.outdir + "/bindings.mts", "a") as bindings:
1585             bindings.write("""
1586
1587 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) {
1588         const weak: WeakRef<object>|undefined = js_objs[obj_ptr];
1589         if (weak == null || weak == undefined) {
1590                 console.error("Got function call on unknown/free'd JS object!");
1591                 throw new Error("Got function call on unknown/free'd JS object!");
1592         }
1593         const obj = weak.deref();
1594         if (obj == null || obj == undefined) {
1595                 console.error("Got function call on GC'd JS object!");
1596                 throw new Error("Got function call on GC'd JS object!");
1597         }
1598         var fn;
1599 """)
1600             bindings.write("\tswitch (fn_id) {\n")
1601             for f in self.function_ptrs:
1602                 bindings.write(f"\t\tcase {str(f)}: fn = Object.getOwnPropertyDescriptor(obj, \"{self.function_ptrs[f][1]}\"); break;\n")
1603
1604             bindings.write("""\t\tdefault:
1605                         console.error("Got unknown function call from C!");
1606                         throw new Error("Got unknown function call from C!");
1607         }
1608         if (fn == null || fn == undefined) {
1609                 console.error("Got function call on incorrect JS object!");
1610                 throw new Error("Got function call on incorrect JS object!");
1611         }
1612         const ret = fn.value.bind(obj)(arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8, arg9, arg10);
1613         if (ret === undefined || ret === null) return BigInt(0);
1614         return BigInt(ret);
1615 }""")