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