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