_ 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, **kwargs):
  15
  16         self.c_type_map = dict(
  17             uint8_t = ['number', 'Uint8Array'],
  18             uint16_t = ['number', 'Uint16Array'],
  19             uint32_t = ['number', 'Uint32Array'],
  20             uint64_t = ['number'],
  21         )
  22
  23         self.wasm_decoding_map = dict(
  24             int8_tArray = 'decodeArray'
  25         )
  26
  27         self.wasm_encoding_map = dict(
  28             int8_tArray = 'encodeArray',
  29         )
  30
  31         self.to_hu_conv_templates = dict(
  32             ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  33             default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
  34         )
  35
  36         self.bindings_header = self.wasm_import_header(target) + """
  37 export class VecOrSliceDef {
  38     public dataptr: number;
  39     public datalen: number;
  40     public stride: number;
  41     public constructor(dataptr: number, datalen: number, stride: number) {
  42         this.dataptr = dataptr;
  43         this.datalen = datalen;
  44         this.stride = stride;
  45     }
  46 }
  47
  48 /*
  49 TODO: load WASM file
  50 static {
  51     System.loadLibrary(\"lightningjni\");
  52     init(java.lang.Enum.class, VecOrSliceDef.class);
  53     init_class_cache();
  54 }
  55
  56 static native void init(java.lang.Class c, java.lang.Class slicedef);
  57 static native void init_class_cache();
  58
  59 public static native boolean deref_bool(long ptr);
  60 public static native long deref_long(long ptr);
  61 public static native void free_heap_ptr(long ptr);
  62 public static native byte[] read_bytes(long ptr, long len);
  63 public static native byte[] get_u8_slice_bytes(long slice_ptr);
  64 public static native long bytes_to_u8_vec(byte[] bytes);
  65 public static native long new_txpointer_copy_data(byte[] txdata);
  66 public static native void txpointer_free(long ptr);
  67 public static native byte[] txpointer_get_buffer(long ptr);
  68 public static native long vec_slice_len(long vec);
  69 public static native long new_empty_slice_vec();
  70 */
  71
  72 """
  73
  74         self.bindings_version_file = ""
  75
  76         self.bindings_footer = """
  77         export async function initializeWasm(allowDoubleInitialization: boolean = false): Promise<void> {
  78             if(isWasmInitialized && !allowDoubleInitialization) {
  79                 return;
  80             }
  81             const wasmInstance = await WebAssembly.instantiate(wasmModule, imports)
  82             wasm = wasmInstance.exports;
  83             isWasmInitialized = true;
  84         }
  85         """
  86
  87         self.util_fn_pfx = ""
  88         self.util_fn_sfx = ""
  89
  90         self.common_base = """
  91             export default class CommonBase {
  92                 ptr: number;
  93                 ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
  94                 protected constructor(ptr: number) { this.ptr = ptr; }
  95                 public _test_only_get_ptr(): number { return this.ptr; }
  96                 protected finalize() {
  97                     // TODO: finalize myself
  98                 }
  99             }
 100 """
 101
 102         self.c_file_pfx = """#include "js-wasm.h"
 103 #include <stdatomic.h>
 104 #include <lightning.h>
 105
 106 // These should be provided...somehow...
 107 void *memset(void *s, int c, size_t n);
 108 void *memcpy(void *dest, const void *src, size_t n);
 109 int memcmp(const void *s1, const void *s2, size_t n);
 110
 111 void __attribute__((noreturn)) abort(void);
 112 static inline void assert(bool expression) {
 113         if (!expression) { abort(); }
 114 }
 115 """
 116
 117         if not DEBUG:
 118             self.c_file_pfx = self.c_file_pfx + """
 119 void *malloc(size_t size);
 120 void free(void *ptr);
 121
 122 #define MALLOC(a, _) malloc(a)
 123 #define FREE(p) if ((unsigned long)(p) > 4096) { free(p); }
 124 #define DO_ASSERT(a) (void)(a)
 125 #define CHECK(a)
 126 #define CHECK_ACCESS(p)
 127 """
 128         else:
 129             self.c_file_pfx = self.c_file_pfx + """
 130 // Always run a, then assert it is true:
 131 #define DO_ASSERT(a) do { bool _assert_val = (a); assert(_assert_val); } while(0)
 132 // Assert a is true or do nothing
 133 #define CHECK(a) DO_ASSERT(a)
 134
 135 // Running a leak check across all the allocations and frees of the JDK is a mess,
 136 // so instead we implement our own naive leak checker here, relying on the -wrap
 137 // linker option to wrap malloc/calloc/realloc/free, tracking everyhing allocated
 138 // and free'd in Rust or C across the generated bindings shared library.
 139
 140 #define BT_MAX 128
 141 typedef struct allocation {
 142         struct allocation* next;
 143         void* ptr;
 144         const char* struct_name;
 145 } allocation;
 146 static allocation* allocation_ll = NULL;
 147
 148 void* __real_malloc(size_t len);
 149 void* __real_calloc(size_t nmemb, size_t len);
 150 static void new_allocation(void* res, const char* struct_name) {
 151         allocation* new_alloc = __real_malloc(sizeof(allocation));
 152         new_alloc->ptr = res;
 153         new_alloc->struct_name = struct_name;
 154         new_alloc->next = allocation_ll;
 155         allocation_ll = new_alloc;
 156 }
 157 static void* MALLOC(size_t len, const char* struct_name) {
 158         void* res = __real_malloc(len);
 159         new_allocation(res, struct_name);
 160         return res;
 161 }
 162 void __real_free(void* ptr);
 163 static void alloc_freed(void* ptr) {
 164         allocation* p = NULL;
 165         allocation* it = allocation_ll;
 166         while (it->ptr != ptr) {
 167                 p = it; it = it->next;
 168                 if (it == NULL) {
 169                         //XXX: fprintf(stderr, "Tried to free unknown pointer %p\\n", ptr);
 170                         return; // addrsan should catch malloc-unknown and print more info than we have
 171                 }
 172         }
 173         if (p) { p->next = it->next; } else { allocation_ll = it->next; }
 174         DO_ASSERT(it->ptr == ptr);
 175         __real_free(it);
 176 }
 177 static void FREE(void* ptr) {
 178         if ((unsigned long)ptr <= 4096) return; // Rust loves to create pointers to the NULL page for dummys
 179         alloc_freed(ptr);
 180         __real_free(ptr);
 181 }
 182
 183 static void CHECK_ACCESS(void* ptr) {
 184         allocation* it = allocation_ll;
 185         while (it->ptr != ptr) {
 186                 it = it->next;
 187                 if (it == NULL) {
 188                         return; // addrsan should catch malloc-unknown and print more info than we have
 189                 }
 190         }
 191 }
 192
 193 void* __wrap_malloc(size_t len) {
 194         void* res = __real_malloc(len);
 195         new_allocation(res, "malloc call");
 196         return res;
 197 }
 198 void* __wrap_calloc(size_t nmemb, size_t len) {
 199         void* res = __real_calloc(nmemb, len);
 200         new_allocation(res, "calloc call");
 201         return res;
 202 }
 203 void __wrap_free(void* ptr) {
 204         if (ptr == NULL) return;
 205         alloc_freed(ptr);
 206         __real_free(ptr);
 207 }
 208
 209 void* __real_realloc(void* ptr, size_t newlen);
 210 void* __wrap_realloc(void* ptr, size_t len) {
 211         if (ptr != NULL) alloc_freed(ptr);
 212         void* res = __real_realloc(ptr, len);
 213         new_allocation(res, "realloc call");
 214         return res;
 215 }
 216 void __wrap_reallocarray(void* ptr, size_t new_sz) {
 217         // Rust doesn't seem to use reallocarray currently
 218         DO_ASSERT(false);
 219 }
 220
 221 void __attribute__((destructor)) check_leaks() {
 222         for (allocation* a = allocation_ll; a != NULL; a = a->next) {
 223                 //XXX: fprintf(stderr, "%s %p remains\\n", a->struct_name, a->ptr);
 224         }
 225         DO_ASSERT(allocation_ll == NULL);
 226 }
 227 """
 228         self.c_file_pfx = self.c_file_pfx + """
 229 // We assume that CVec_u8Z and u8slice are the same size and layout (and thus pointers to the two can be mixed)
 230 _Static_assert(sizeof(LDKCVec_u8Z) == sizeof(LDKu8slice), "Vec<u8> and [u8] need to have been mapped identically");
 231 _Static_assert(offsetof(LDKCVec_u8Z, data) == offsetof(LDKu8slice, data), "Vec<u8> and [u8] need to have been mapped identically");
 232 _Static_assert(offsetof(LDKCVec_u8Z, datalen) == offsetof(LDKu8slice, datalen), "Vec<u8> and [u8] need to have been mapped identically");
 233
 234 _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 235
 236 typedef uint32_t int64_tArray;
 237 typedef uint32_t int8_tArray;
 238 typedef uint32_t uint32_tArray;
 239 typedef uint32_t ptrArray;
 240 typedef uint32_t jstring;
 241
 242 static inline uint32_t init_arr(size_t arr_len, size_t elem_size, const char *type_desc) {
 243         uint32_t *elems = (uint32_t*)MALLOC(arr_len * elem_size + 4, type_desc);
 244         elems[0] = arr_len;
 245         return (uint32_t)elems;
 246 }
 247
 248 static inline jstring str_ref_to_ts(const char* chars, size_t len) {
 249         char* err_buf = MALLOC(len + 4, "str conv buf");
 250         *((uint32_t*)err_buf) = len;
 251         memcpy(err_buf + 4, chars, len);
 252         return (uint32_t) err_buf;
 253 }
 254 static inline LDKStr str_ref_to_owned_c(jstring str) {
 255         uint32_t *str_len = (uint32_t*)str;
 256         char* newchars = MALLOC(*str_len + 1, "String chars");
 257         memcpy(newchars, (const char*)(str + 4), *str_len);
 258         newchars[*str_len] = 0;
 259         LDKStr res= {
 260                 .chars = newchars,
 261                 .len = *str_len,
 262                 .chars_is_owned = true
 263         };
 264         return res;
 265 }
 266
 267 typedef bool jboolean;
 268
 269 uint32_t __attribute__((visibility("default"))) TS_malloc(uint32_t size) {
 270         return (uint32_t)MALLOC(size, "JS-Called malloc");
 271 }
 272 void __attribute__((visibility("default"))) TS_free(uint32_t ptr) {
 273         FREE((void*)ptr);
 274 }
 275 """
 276
 277         self.c_version_file = ""
 278
 279         self.hu_struct_file_prefix = f"""
 280 import CommonBase from './CommonBase';
 281 import * as bindings from '../bindings' // TODO: figure out location
 282
 283 """
 284         self.c_fn_ty_pfx = ""
 285         self.file_ext = ".ts"
 286         self.ptr_c_ty = "uint32_t"
 287         self.ptr_native_ty = "number"
 288         self.result_c_ty = "uint32_t"
 289         self.ptr_arr = "ptrArray"
 290         self.is_arr_some_check = ("", " != 0")
 291         self.get_native_arr_len_call = ("*((uint32_t*)", ")")
 292
 293     def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
 294         return None
 295     def create_native_arr_call(self, arr_len, ty_info):
 296         if ty_info.c_ty == "int8_tArray":
 297             return "init_arr(" + arr_len + ", sizeof(uint8_t), \"Native int8_tArray Bytes\")"
 298         elif ty_info.c_ty == "int64_tArray":
 299             return "init_arr(" + arr_len + ", sizeof(uint64_t), \"Native int64_tArray Bytes\")"
 300         elif ty_info.c_ty == "uint32_tArray":
 301             return "init_arr(" + arr_len + ", sizeof(uint32_t), \"Native uint32_tArray Bytes\")"
 302         elif ty_info.c_ty == "ptrArray":
 303             assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
 304             return "init_arr(" + arr_len + ", sizeof(uint32_t), \"Native ptrArray Bytes\")"
 305         else:
 306             print("Need to create arr!", ty_info.c_ty)
 307             return ty_info.c_ty
 308     def set_native_arr_contents(self, arr_name, arr_len, ty_info):
 309         if ty_info.c_ty == "int8_tArray":
 310             return ("memcpy((uint8_t*)(" + arr_name + " + 4), ", ", " + arr_len + ")")
 311         else:
 312             assert False
 313     def get_native_arr_contents(self, arr_name, dest_name, arr_len, ty_info, copy):
 314         if ty_info.c_ty == "int8_tArray":
 315             if copy:
 316                 return "memcpy(" + dest_name + ", (uint8_t*)(" + arr_name + " + 4), " + arr_len + ")"
 317             else:
 318                 return "(int8_t*)(" + arr_name + " + 4)"
 319         else:
 320             return "(" + ty_info.subty.c_ty + "*)(" + arr_name + " + 4)"
 321     def get_native_arr_elem(self, arr_name, idxc, ty_info):
 322         assert False # Only called if above is None
 323     def get_native_arr_ptr_call(self, ty_info):
 324         if ty_info.subty is not None:
 325             return "(" + ty_info.subty.c_ty + "*)(", " + 4)"
 326         return "(" + ty_info.c_ty + "*)(", " + 4)"
 327     def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
 328         return None
 329     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
 330         if ty_info.c_ty == "int8_tArray":
 331             return None
 332         else:
 333             return None
 334
 335     def str_ref_to_native_call(self, var_name, str_len):
 336         return "str_ref_to_ts(" + var_name + ", " + str_len + ")"
 337     def str_ref_to_c_call(self, var_name):
 338         return "str_ref_to_owned_c(" + var_name + ")"
 339
 340     def c_fn_name_define_pfx(self, fn_name, have_args):
 341         return " __attribute__((visibility(\"default\"))) TS_" + fn_name + "("
 342
 343     def wasm_import_header(self, target):
 344         if target == Target.NODEJS:
 345             return """
 346 import * as fs from 'fs';
 347 const source = fs.readFileSync('./ldk.wasm');
 348
 349 const memory = new WebAssembly.Memory({initial: 256});
 350 const wasmModule = new WebAssembly.Module(source);
 351
 352 const imports: any = {};
 353 imports.env = {};
 354
 355 imports.env.memoryBase = 0;
 356 imports.env.memory = memory;
 357 imports.env.tableBase = 0;
 358 imports.env.table = new WebAssembly.Table({initial: 4, element: 'anyfunc'});
 359
 360 imports.env["abort"] = function () {
 361     console.error("ABORT");
 362 };
 363
 364 let wasm = null;
 365 let isWasmInitialized: boolean = false;
 366
 367
 368 // WASM CODEC
 369
 370 const nextMultipleOfFour = (value: number) => {
 371     return Math.ceil(value / 4) * 4;
 372 }
 373
 374 const encodeUint8Array = (inputArray) => {
 375         const cArrayPointer = wasm.TS_malloc(inputArray.length + 4);
 376         const arrayLengthView = new Uint32Array(memory.buffer, cArrayPointer, 1);
 377     arrayLengthView[0] = inputArray.length;
 378         const arrayMemoryView = new Uint8Array(memory.buffer, cArrayPointer + 4, inputArray.length);
 379         arrayMemoryView.set(inputArray);
 380         return cArrayPointer;
 381 }
 382
 383 const encodeUint32Array = (inputArray) => {
 384         const cArrayPointer = wasm.TS_malloc((inputArray.length + 1) * 4);
 385         const arrayMemoryView = new Uint32Array(memory.buffer, cArrayPointer, inputArray.length);
 386         arrayMemoryView.set(inputArray, 1);
 387     arrayMemoryView[0] = inputArray.length;
 388         return cArrayPointer;
 389 }
 390
 391 const getArrayLength = (arrayPointer) => {
 392         const arraySizeViewer = new Uint32Array(
 393                 memory.buffer, // value
 394                 arrayPointer, // offset
 395                 1 // one int
 396         );
 397         return arraySizeViewer[0];
 398 }
 399 const decodeUint8Array = (arrayPointer, free = true) => {
 400         const arraySize = getArrayLength(arrayPointer);
 401         const actualArrayViewer = new Uint8Array(
 402                 memory.buffer, // value
 403                 arrayPointer + 4, // offset (ignoring length bytes)
 404                 arraySize // uint8 count
 405         );
 406         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 407         // will free the underlying memory when it becomes unreachable instead of copying here.
 408         const actualArray = actualArrayViewer.slice(0, arraySize);
 409         if (free) {
 410                 wasm.TS_free(arrayPointer);
 411         }
 412         return actualArray;
 413 }
 414 const decodeUint32Array = (arrayPointer, free = true) => {
 415         const arraySize = getArrayLength(arrayPointer);
 416         const actualArrayViewer = new Uint32Array(
 417                 memory.buffer, // value
 418                 arrayPointer + 4, // offset (ignoring length bytes)
 419                 arraySize // uint32 count
 420         );
 421         // Clone the contents, TODO: In the future we should wrap the Viewer in a class that
 422         // will free the underlying memory when it becomes unreachable instead of copying here.
 423         const actualArray = actualArrayViewer.slice(0, arraySize);
 424         if (free) {
 425                 wasm.TS_free(arrayPointer);
 426         }
 427         return actualArray;
 428 }
 429
 430 const encodeString = (string) => {
 431     // make malloc count divisible by 4
 432     const memoryNeed = nextMultipleOfFour(string.length + 1);
 433     const stringPointer = wasm.TS_malloc(memoryNeed);
 434     const stringMemoryView = new Uint8Array(
 435         memory.buffer, // value
 436         stringPointer, // offset
 437         string.length + 1 // length
 438     );
 439     for (let i = 0; i < string.length; i++) {
 440         stringMemoryView[i] = string.charCodeAt(i);
 441     }
 442     stringMemoryView[string.length] = 0;
 443     return stringPointer;
 444 }
 445
 446 const decodeString = (stringPointer, free = true) => {
 447     const memoryView = new Uint8Array(memory.buffer, stringPointer);
 448     let cursor = 0;
 449     let result = '';
 450
 451     while (memoryView[cursor] !== 0) {
 452         result += String.fromCharCode(memoryView[cursor]);
 453         cursor++;
 454     }
 455
 456     if (free) {
 457         wasm.wasm_free(stringPointer);
 458     }
 459
 460     return result;
 461 };
 462 """
 463         return ''
 464
 465     def init_str(self):
 466         return ""
 467
 468     def native_c_unitary_enum_map(self, struct_name, variants, enum_doc_comment):
 469         out_c = "static inline LDK" + struct_name + " LDK" + struct_name + "_from_js(int32_t ord) {\n"
 470         out_c = out_c + "\tswitch (ord) {\n"
 471         ord_v = 0
 472
 473         out_typescript_enum_fields = ""
 474
 475         for var, var_docs in variants:
 476             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
 477             ord_v = ord_v + 1
 478             if var_docs is not None:
 479                 out_typescript_enum_fields += f"/**\n * {var_docs}\n */\n"
 480             out_typescript_enum_fields += f"{var},\n\t\t\t\t"
 481         out_c = out_c + "\t}\n"
 482         out_c = out_c + "\tabort();\n"
 483         out_c = out_c + "}\n"
 484
 485         out_c = out_c + "static inline int32_t LDK" + struct_name + "_to_js(LDK" + struct_name + " val) {\n"
 486         out_c = out_c + "\tswitch (val) {\n"
 487         ord_v = 0
 488         for var, _ in variants:
 489             out_c = out_c + "\t\tcase " + var + ": return %d;\n" % ord_v
 490             ord_v = ord_v + 1
 491         out_c = out_c + "\t\tdefault: abort();\n"
 492         out_c = out_c + "\t}\n"
 493         out_c = out_c + "}\n"
 494
 495         out_typescript_enum = f"""
 496             export enum {struct_name} {{
 497                 {out_typescript_enum_fields}
 498             }}
 499 """
 500
 501         return (out_c, out_typescript_enum, "")
 502
 503     def c_unitary_enum_to_native_call(self, ty_info):
 504         return (ty_info.rust_obj + "_to_js(", ")")
 505     def native_unitary_enum_to_c_call(self, ty_info):
 506         return (ty_info.rust_obj + "_from_js(", ")")
 507
 508     def c_complex_enum_pass_ty(self, struct_name):
 509         return "uint32_t"
 510
 511     def c_constr_native_complex_enum(self, struct_name, variant, c_params):
 512         ret = "0 /* " + struct_name + " - " + variant + " */"
 513         for param in c_params:
 514             ret = ret + "; (void) " + param
 515         return ret
 516
 517     def native_c_map_trait(self, struct_name, field_var_conversions, flattened_field_var_conversions, field_function_lines, trait_doc_comment):
 518         out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
 519
 520         constructor_arguments = ""
 521         super_instantiator = ""
 522         pointer_to_adder = ""
 523         impl_constructor_arguments = ""
 524         for var in flattened_field_var_conversions:
 525             if isinstance(var, ConvInfo):
 526                 constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
 527                 impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
 528                 if var.from_hu_conv is not None:
 529                     super_instantiator += ", " + var.from_hu_conv[0]
 530                     if var.from_hu_conv[1] != "":
 531                         pointer_to_adder += var.from_hu_conv[1] + ";\n"
 532                 else:
 533                     super_instantiator += ", " + first_to_lower(var.arg_name)
 534             else:
 535                 constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
 536                 super_instantiator += ", " + first_to_lower(var[1])
 537                 pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
 538                 impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
 539
 540         # BUILD INTERFACE METHODS
 541         out_java_interface = ""
 542         out_interface_implementation_overrides = ""
 543         java_methods = []
 544         for fn_line in field_function_lines:
 545             java_method_descriptor = ""
 546             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 547                 out_java_interface += fn_line.fn_name + "("
 548                 out_interface_implementation_overrides += f"{fn_line.fn_name} ("
 549
 550                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 551                     if idx >= 1:
 552                         out_java_interface += ", "
 553                         out_interface_implementation_overrides += ", "
 554                     out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
 555                     out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 556                     java_method_descriptor += arg_conv_info.java_fn_ty_arg
 557                 out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
 558                 java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
 559                 java_methods.append((fn_line.fn_name, java_method_descriptor))
 560
 561                 out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
 562
 563                 interface_method_override_inset = "\t\t\t\t\t\t"
 564                 interface_implementation_inset = "\t\t\t\t\t\t\t"
 565                 for arg_info in fn_line.args_ty:
 566                     if arg_info.to_hu_conv is not None:
 567                         out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
 568
 569                 if fn_line.ret_ty_info.java_ty != "void":
 570                     out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
 571                 else:
 572                     out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
 573
 574                 for idx, arg_info in enumerate(fn_line.args_ty):
 575                     if idx != 0:
 576                         out_interface_implementation_overrides += ", "
 577                     if arg_info.to_hu_conv_name is not None:
 578                         out_interface_implementation_overrides += arg_info.to_hu_conv_name
 579                     else:
 580                         out_interface_implementation_overrides += arg_info.arg_name
 581
 582                 out_interface_implementation_overrides += ");\n"
 583                 if fn_line.ret_ty_info.java_ty != "void":
 584                     if fn_line.ret_ty_info.from_hu_conv is not None:
 585                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\t" + f"result: {fn_line.ret_ty_info.java_ty} = " + fn_line.ret_ty_info.from_hu_conv[0] + ";\n"
 586                         if fn_line.ret_ty_info.from_hu_conv[1] != "":
 587                             out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\t" + fn_line.ret_ty_info.from_hu_conv[1].replace("this", "impl_holder.held") + ";\n"
 588                         #if fn_line.ret_ty_info.rust_obj in result_types:
 589                         # XXX: We need to handle this in conversion logic so that its cross-language!
 590                         # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
 591                         #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
 592                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
 593                     else:
 594                         out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
 595                 out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
 596
 597         trait_constructor_arguments = ""
 598         for var in field_var_conversions:
 599             if isinstance(var, ConvInfo):
 600                 trait_constructor_arguments += ", " + var.arg_name
 601             else:
 602                 trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl"
 603                 for suparg in var[2]:
 604                     if isinstance(suparg, ConvInfo):
 605                         trait_constructor_arguments += ", " + suparg.arg_name
 606                     else:
 607                         trait_constructor_arguments += ", " + suparg[1]
 608                 trait_constructor_arguments += ").bindings_instance"
 609                 for suparg in var[2]:
 610                     if isinstance(suparg, ConvInfo):
 611                         trait_constructor_arguments += ", " + suparg.arg_name
 612                     else:
 613                         trait_constructor_arguments += ", " + suparg[1]
 614
 615         out_typescript_human = f"""
 616             {self.hu_struct_file_prefix}
 617
 618             export class {struct_name.replace("LDK","")} extends CommonBase {{
 619
 620                 bindings_instance?: bindings.{struct_name};
 621
 622                 constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
 623                     if (Number.isFinite(ptr)) {{
 624                                         super(ptr);
 625                                         this.bindings_instance = null;
 626                                     }} else {{
 627                                         // TODO: private constructor instantiation
 628                                         super(bindings.{struct_name}_new(arg{super_instantiator}));
 629                                         this.ptrs_to.push(arg);
 630                                         {pointer_to_adder}
 631                                     }}
 632                 }}
 633
 634                 protected finalize() {{
 635                     if (this.ptr != 0) {{
 636                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 637                     }}
 638                     super.finalize();
 639                 }}
 640
 641                 static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
 642                     const impl_holder: {struct_name}Holder = new {struct_name}Holder();
 643                     let structImplementation = <bindings.{struct_name}>{{
 644                         // todo: in-line interface filling
 645                         {out_interface_implementation_overrides}
 646                     }};
 647                     impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
 648                 }}
 649             }}
 650
 651             export interface {struct_name.replace("LDK", "")}Interface {{
 652                 {out_java_interface}
 653             }}
 654
 655             class {struct_name}Holder {{
 656                 held: {struct_name.replace("LDK", "")};
 657             }}
 658 """
 659
 660         out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
 661         java_meths = []
 662         for fn_line in field_function_lines:
 663             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 664                 out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
 665
 666                 for idx, arg_conv_info in enumerate(fn_line.args_ty):
 667                     if idx >= 1:
 668                         out_typescript_bindings = out_typescript_bindings + ", "
 669                     out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 670
 671                 out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
 672
 673         out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
 674
 675         out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
 676         for var in flattened_field_var_conversions:
 677             if isinstance(var, ConvInfo):
 678                 out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
 679             else:
 680                 out_typescript_bindings += f", {var[1]}: {var[0]}"
 681
 682         out_typescript_bindings += f"""): number {{
 683             throw new Error('unimplemented'); // TODO: bind to WASM
 684         }}
 685 """
 686
 687         out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
 688
 689         # Now that we've written out our java code (and created java_meths), generate C
 690         out_c = "typedef struct " + struct_name + "_JCalls {\n"
 691         out_c = out_c + "\tatomic_size_t refcnt;\n"
 692         for var in flattened_field_var_conversions:
 693             if isinstance(var, ConvInfo):
 694                 # We're a regular ol' field
 695                 pass
 696             else:
 697                 # We're a supertrait
 698                 out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
 699         for fn in field_function_lines:
 700             if fn.fn_name != "free" and fn.fn_name != "cloned":
 701                 out_c = out_c + "\tuint32_t " + fn.fn_name + "_meth;\n"
 702         out_c = out_c + "} " + struct_name + "_JCalls;\n"
 703
 704         for fn_line in field_function_lines:
 705             if fn_line.fn_name == "free":
 706                 out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
 707                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 708                 out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
 709                 for fn in field_function_lines:
 710                     if fn.fn_name != "free" and fn.fn_name != "cloned":
 711                         out_c = out_c + "\t\tjs_free(j_calls->" + fn.fn_name + "_meth);\n"
 712                 out_c = out_c + "\t\tFREE(j_calls);\n"
 713                 out_c = out_c + "\t}\n}\n"
 714
 715         for idx, fn_line in enumerate(field_function_lines):
 716             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 717                 assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
 718                 out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_" + struct_name + "_jcall("
 719                 if fn_line.self_is_const:
 720                     out_c = out_c + "const void* this_arg"
 721                 else:
 722                     out_c = out_c + "void* this_arg"
 723
 724                 for idx, arg in enumerate(fn_line.args_ty):
 725                     out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
 726
 727                 out_c = out_c + ") {\n"
 728                 out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
 729
 730                 for arg_info in fn_line.args_ty:
 731                     if arg_info.ret_conv is not None:
 732                         out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
 733                         out_c = out_c + arg_info.arg_name
 734                         out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
 735
 736                 if fn_line.ret_ty_info.c_ty.endswith("Array"):
 737                     out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " ret = js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->" + fn_line.fn_name + "_meth"
 738                 elif fn_line.ret_ty_info.java_ty == "void":
 739                     out_c = out_c + "\tjs_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->" + fn_line.fn_name + "_meth"
 740                 elif fn_line.ret_ty_info.java_ty == "String":
 741                     out_c = out_c + "\tuint32_t ret = js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->" + fn_line.fn_name + "_meth"
 742                 elif not fn_line.ret_ty_info.passed_as_ptr:
 743                     out_c = out_c + "\treturn js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->" + fn_line.fn_name + "_meth"
 744                 else:
 745                     out_c = out_c + "\tuint32_t ret = js_invoke_function_" + str(len(fn_line.args_ty)) + "(j_calls->" + fn_line.fn_name + "_meth"
 746
 747                 for idx, arg_info in enumerate(fn_line.args_ty):
 748                     if arg_info.ret_conv is not None:
 749                         out_c = out_c + ", " + arg_info.ret_conv_name
 750                     else:
 751                         out_c = out_c + ", " + arg_info.arg_name
 752                 out_c = out_c + ");\n"
 753                 if fn_line.ret_ty_info.arg_conv is not None:
 754                     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"
 755
 756                 out_c = out_c + "}\n"
 757
 758         # Write out a clone function whether we need one or not, as we use them in moving to rust
 759         out_c = out_c + "static void " + struct_name + "_JCalls_cloned(" + struct_name + "* new_obj) {\n"
 760         out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) new_obj->this_arg;\n"
 761         out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
 762         for var in field_var_conversions:
 763             if not isinstance(var, ConvInfo):
 764                 out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
 765         out_c = out_c + "}\n"
 766
 767         out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (/*TODO: JS Object Reference */void* o"
 768         for var in flattened_field_var_conversions:
 769             if isinstance(var, ConvInfo):
 770                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 771             else:
 772                 out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
 773         out_c = out_c + ") {\n"
 774
 775         out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
 776         out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
 777         out_c = out_c + "\t//TODO: Assign calls->o from o\n"
 778
 779         for (fn_name, java_meth_descr) in java_meths:
 780             if fn_name != "free" and fn_name != "cloned":
 781                 out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
 782                 out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
 783
 784         for var in flattened_field_var_conversions:
 785             if isinstance(var, ConvInfo) and var.arg_conv is not None:
 786                 out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
 787         out_c = out_c + "\n\t" + struct_name + " ret = {\n"
 788         out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
 789         for fn_line in field_function_lines:
 790             if fn_line.fn_name != "free" and fn_line.fn_name != "cloned":
 791                 out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_" + struct_name + "_jcall,\n"
 792             elif fn_line.fn_name == "free":
 793                 out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
 794             else:
 795                 out_c = out_c + "\t\t.cloned = " + struct_name + "_JCalls_cloned,\n"
 796         for var in field_var_conversions:
 797             if isinstance(var, ConvInfo):
 798                 if var.arg_conv_name is not None:
 799                     out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
 800                     out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
 801                 else:
 802                     out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
 803                     out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
 804             else:
 805                 out_c += "\t\t." + var[1] + " = " + var[0] + "_init(" + var[1]
 806                 for suparg in var[2]:
 807                     if isinstance(suparg, ConvInfo):
 808                         out_c += ", " + suparg.arg_name
 809                     else:
 810                         out_c += ", " + suparg[1]
 811                 out_c += "),\n"
 812         out_c = out_c + "\t};\n"
 813         for var in flattened_field_var_conversions:
 814             if not isinstance(var, ConvInfo):
 815                 out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
 816         out_c = out_c + "\treturn ret;\n"
 817         out_c = out_c + "}\n"
 818
 819         out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_define_pfx(struct_name + "_new", True) + "/*TODO: JS Object Reference */void* o"
 820         for var in flattened_field_var_conversions:
 821             if isinstance(var, ConvInfo):
 822                 out_c = out_c + ", " + var.c_ty + " " + var.arg_name
 823             else:
 824                 out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
 825         out_c = out_c + ") {\n"
 826         out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
 827         out_c = out_c + "\t*res_ptr = " + struct_name + "_init(o"
 828         for var in flattened_field_var_conversions:
 829             if isinstance(var, ConvInfo):
 830                 out_c = out_c + ", " + var.arg_name
 831             else:
 832                 out_c = out_c + ", " + var[1]
 833         out_c = out_c + ");\n"
 834         out_c = out_c + "\treturn (long)res_ptr;\n"
 835         out_c = out_c + "}\n"
 836
 837         return (out_typescript_bindings, out_typescript_human, out_c)
 838
 839     def trait_struct_inc_refcnt(self, ty_info):
 840         return ""
 841
 842     def map_complex_enum(self, struct_name, variant_list, camel_to_snake, enum_doc_comment):
 843         java_hu_type = struct_name.replace("LDK", "")
 844
 845         out_java_enum = ""
 846         out_java = ""
 847         out_c = ""
 848
 849         out_java_enum += (self.hu_struct_file_prefix)
 850         out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
 851         out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
 852         out_java_enum += ("\tprotected finalize() {\n")
 853         out_java_enum += ("\t\tsuper.finalize();\n")
 854         out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
 855         out_java_enum += ("\t}\n")
 856         out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
 857         out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
 858         java_hu_subclasses = ""
 859
 860         out_java +=  ("\tpublic static class " + struct_name + " {\n")
 861         out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
 862         for var in variant_list:
 863             out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
 864             java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
 865             out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
 866             out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
 867             init_meth_params = ""
 868             init_meth_body = ""
 869             hu_conv_body = ""
 870             for idx, (field_ty, field_docs) in enumerate(var.fields):
 871                 out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
 872                 java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
 873                 if field_ty.to_hu_conv is not None:
 874                     hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
 875                     hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
 876                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
 877                 else:
 878                     hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
 879                 if idx > 0:
 880                     init_meth_params = init_meth_params + ", "
 881                 init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
 882                 init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
 883             out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
 884             out_java +=  (init_meth_body)
 885             out_java +=  ("}\n")
 886             out_java += ("\t\t}\n")
 887             out_java_enum += ("\t\t}\n")
 888             java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
 889             java_hu_subclasses = java_hu_subclasses + hu_conv_body
 890             java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
 891         out_java += ("\t\tstatic native void init();\n")
 892         out_java += ("\t}\n")
 893         out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
 894         out_java += ("\tstatic { " + struct_name + ".init(); }\n")
 895         out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
 896
 897         out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + self.c_fn_name_define_pfx(struct_name + "_ref_from_ptr", True) + self.ptr_c_ty + " ptr) {\n")
 898         out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)(ptr & ~1);\n")
 899         out_c += ("\tswitch(obj->tag) {\n")
 900         for var in variant_list:
 901             out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
 902             c_params = []
 903             for idx, (field_map, _) in enumerate(var.fields):
 904                 if field_map.ret_conv is not None:
 905                     out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
 906                     if var.tuple_variant:
 907                         out_c += "obj->" + camel_to_snake(var.var_name)
 908                     else:
 909                         out_c += "obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name
 910                     out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
 911                     c_params.append(field_map.ret_conv_name)
 912                 else:
 913                     if var.tuple_variant:
 914                         c_params.append("obj->" + camel_to_snake(var.var_name))
 915                     else:
 916                         c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
 917             out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
 918             out_c += ("\t\t}\n")
 919         out_c += ("\t\tdefault: abort();\n")
 920         out_c += ("\t}\n}\n")
 921         out_java_enum += ("}\n")
 922         out_java_enum += (java_hu_subclasses)
 923         return (out_java, out_java_enum, out_c)
 924
 925     def map_opaque_struct(self, struct_name, struct_doc_comment):
 926         implementations = ""
 927         method_header = ""
 928         if struct_name.startswith("LDKLocked"):
 929             implementations += "implements AutoCloseable "
 930             method_header = """
 931                 public close() {
 932 """
 933         else:
 934             method_header = """
 935                 protected finalize() {
 936                     super.finalize();
 937 """
 938
 939         out_opaque_struct_human = f"""
 940             {self.hu_struct_file_prefix}
 941
 942             export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
 943                 constructor(_dummy: object, ptr: number) {{
 944                     super(ptr);
 945                 }}
 946
 947                 {method_header}
 948                     if (this.ptr != 0) {{
 949                         bindings.{struct_name.replace("LDK","")}_free(this.ptr);
 950                     }}
 951                 }}
 952 """
 953         return out_opaque_struct_human
 954
 955     def map_tuple(self, struct_name):
 956         return self.map_opaque_struct(struct_name, "A Tuple")
 957
 958     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):
 959         out_java = ""
 960         out_c = ""
 961         out_java_struct = None
 962
 963         out_java += ("\tpublic static native ")
 964         out_c += (self.c_fn_ty_pfx)
 965         out_c += (return_type_info.c_ty)
 966         out_java += (return_type_info.java_ty)
 967         if return_type_info.ret_conv is not None:
 968             ret_conv_pfx, ret_conv_sfx = return_type_info.ret_conv
 969         out_java += (" " + method_name + "(")
 970         out_c += (" "  + self.c_fn_name_define_pfx(method_name, True))
 971
 972         method_argument_string = ""
 973         native_call_argument_string = ""
 974         for idx, arg_conv_info in enumerate(argument_types):
 975             if idx != 0:
 976                 method_argument_string += (", ")
 977                 native_call_argument_string += ', '
 978                 out_c += (", ")
 979             if arg_conv_info.c_ty != "void":
 980                 out_c += (arg_conv_info.c_ty + " " + arg_conv_info.arg_name)
 981                 needs_encoding = arg_conv_info.c_ty in self.wasm_encoding_map
 982                 native_argument = arg_conv_info.arg_name
 983                 if needs_encoding:
 984                     converter = self.wasm_encoding_map[arg_conv_info.c_ty]
 985                     native_argument = f"{converter}({arg_conv_info.arg_name})"
 986                 method_argument_string += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
 987                 native_call_argument_string += native_argument
 988
 989         has_return_value = return_type_info.c_ty != 'void'
 990         needs_decoding = return_type_info.c_ty in self.wasm_decoding_map
 991         return_statement = 'return nativeResponseValue;'
 992         if not has_return_value:
 993             return_statement = '// debug statements here'
 994         elif needs_decoding:
 995             converter = self.wasm_decoding_map[return_type_info.c_ty]
 996             return_statement = f"return {converter}(nativeResponseValue);"
 997
 998         out_java = f"""\texport function {method_name}({method_argument_string}): {return_type_info.java_ty} {{
 999                 if(!isWasmInitialized) {{
1000                         throw new Error("initializeWasm() must be awaited first!");
1001                 }}
1002                 const nativeResponseValue = wasm.{method_name}({native_call_argument_string});
1003                 {return_statement}
1004         }}
1005 """
1006
1007         out_java_struct = ""
1008         if not args_known:
1009             out_java_struct += ("\t// Skipped " + method_name + "\n")
1010         else:
1011             if not takes_self:
1012                 out_java_struct += (
1013                         "\tpublic static " + return_type_info.java_hu_ty + " constructor_" + meth_n + "(")
1014             else:
1015                 out_java_struct += ("\tpublic " + return_type_info.java_hu_ty + " " + meth_n + "(")
1016             for idx, arg in enumerate(argument_types):
1017                 if idx != 0:
1018                     if not takes_self or idx > 1:
1019                         out_java_struct += (", ")
1020                 elif takes_self:
1021                     continue
1022                 if arg.java_ty != "void":
1023                     if arg.arg_name in default_constructor_args:
1024                         for explode_idx, explode_arg in enumerate(default_constructor_args[arg.arg_name]):
1025                             if explode_idx != 0:
1026                                 out_java_struct += (", ")
1027                             out_java_struct += (
1028                                     explode_arg.java_hu_ty + " " + arg.arg_name + "_" + explode_arg.arg_name)
1029                     else:
1030                         out_java_struct += (arg.java_hu_ty + " " + arg.arg_name)
1031
1032         out_c += (") {\n")
1033         if out_java_struct is not None:
1034             out_java_struct += (") {\n")
1035         for info in argument_types:
1036             if info.arg_conv is not None:
1037                 out_c += ("\t" + info.arg_conv.replace('\n', "\n\t") + "\n")
1038         if return_type_info.ret_conv is not None:
1039             out_c += ("\t" + ret_conv_pfx.replace('\n', '\n\t'))
1040         elif return_type_info.c_ty != "void":
1041             out_c += ("\t" + return_type_info.c_ty + " ret_val = ")
1042         else:
1043             out_c += ("\t")
1044         if c_call_string is None:
1045             out_c += (method_name + "(")
1046         else:
1047             out_c += (c_call_string)
1048         for idx, info in enumerate(argument_types):
1049             if info.arg_conv_name is not None:
1050                 if idx != 0:
1051                     out_c += (", ")
1052                 elif c_call_string is not None:
1053                     continue
1054                 out_c += (info.arg_conv_name)
1055         out_c += (")")
1056         if return_type_info.ret_conv is not None:
1057             out_c += (ret_conv_sfx.replace('\n', '\n\t'))
1058         else:
1059             out_c += (";")
1060         for info in argument_types:
1061             if info.arg_conv_cleanup is not None:
1062                 out_c += ("\n\t" + info.arg_conv_cleanup.replace("\n", "\n\t"))
1063         if return_type_info.ret_conv is not None:
1064             out_c += ("\n\treturn " + return_type_info.ret_conv_name + ";")
1065         elif return_type_info.c_ty != "void":
1066             out_c += ("\n\treturn ret_val;")
1067         out_c += ("\n}\n\n")
1068
1069         if args_known:
1070             out_java_struct += ("\t\t")
1071             if return_type_info.java_ty != "void":
1072                 out_java_struct += (return_type_info.java_ty + " ret = ")
1073             out_java_struct += ("bindings." + method_name + "(")
1074             for idx, info in enumerate(argument_types):
1075                 if idx != 0:
1076                     out_java_struct += (", ")
1077                 if idx == 0 and takes_self:
1078                     out_java_struct += ("this.ptr")
1079                 elif info.arg_name in default_constructor_args:
1080                     out_java_struct += ("bindings." + info.java_hu_ty + "_new(")
1081                     for explode_idx, explode_arg in enumerate(default_constructor_args[info.arg_name]):
1082                         if explode_idx != 0:
1083                             out_java_struct += (", ")
1084                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1085                         if explode_arg.from_hu_conv is not None:
1086                             out_java_struct += (
1087                                 explode_arg.from_hu_conv[0].replace(explode_arg.arg_name, expl_arg_name))
1088                         else:
1089                             out_java_struct += (expl_arg_name)
1090                     out_java_struct += (")")
1091                 elif info.from_hu_conv is not None:
1092                     out_java_struct += (info.from_hu_conv[0])
1093                 else:
1094                     out_java_struct += (info.arg_name)
1095             out_java_struct += (");\n")
1096             if return_type_info.to_hu_conv is not None:
1097                 if not takes_self:
1098                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t").replace("this",
1099                                                                                                              return_type_info.to_hu_conv_name) + "\n")
1100                 else:
1101                     out_java_struct += ("\t\t" + return_type_info.to_hu_conv.replace("\n", "\n\t\t") + "\n")
1102
1103             for idx, info in enumerate(argument_types):
1104                 if idx == 0 and takes_self:
1105                     pass
1106                 elif info.arg_name in default_constructor_args:
1107                     for explode_arg in default_constructor_args[info.arg_name]:
1108                         expl_arg_name = info.arg_name + "_" + explode_arg.arg_name
1109                         if explode_arg.from_hu_conv is not None and return_type_info.to_hu_conv_name:
1110                             out_java_struct += ("\t\t" + explode_arg.from_hu_conv[1].replace(explode_arg.arg_name,
1111                                                                                              expl_arg_name).replace(
1112                                 "this", return_type_info.to_hu_conv_name) + ";\n")
1113                 elif info.from_hu_conv is not None and info.from_hu_conv[1] != "":
1114                     if not takes_self and return_type_info.to_hu_conv_name is not None:
1115                         out_java_struct += (
1116                                 "\t\t" + info.from_hu_conv[1].replace("this", return_type_info.to_hu_conv_name).replace("\n", "\n\t\t") + ";\n")
1117                     else:
1118                         out_java_struct += ("\t\t" + info.from_hu_conv[1].replace("\n", "\n\t\t") + ";\n")
1119
1120             if return_type_info.to_hu_conv_name is not None:
1121                 out_java_struct += ("\t\treturn " + return_type_info.to_hu_conv_name + ";\n")
1122             elif return_type_info.java_ty != "void" and return_type_info.rust_obj != "LDK" + struct_meth:
1123                 out_java_struct += ("\t\treturn ret;\n")
1124             out_java_struct += ("\t}\n\n")
1125
1126         return (out_java, out_c, out_java_struct)