Do array conv in per-lang files, handle object arrays in TS
[ldk-java] / typescript_strings.py
index dccd8cf3a8d9b0a0133868df8ca5e66818bfe708..0e13c8d6d5510dc106bf2c63940e6e6dd0de35e2 100644 (file)
@@ -1,13 +1,79 @@
+from bindingstypes import ConvInfo
+from enum import Enum
+
+def first_to_lower(string: str) -> str:
+    first = string[0]
+    return first.lower() + string[1:]
+
+
+class Target(Enum):
+    NODEJS = 1,
+    BROWSER = 2
+
 class Consts:
-    def __init__(self, DEBUG):
+    def __init__(self, DEBUG: bool, target: Target, **kwargs):
+
+        self.c_type_map = dict(
+            uint8_t = ['number', 'Uint8Array'],
+            uint16_t = ['number', 'Uint16Array'],
+            uint32_t = ['number', 'Uint32Array'],
+            uint64_t = ['number'],
+        )
+
+        self.to_hu_conv_templates = dict(
+            ptr = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
+            default = 'const {var_name}_hu_conv: {human_type} = new {human_type}(null, {var_name});',
+        )
+
+        self.bindings_header = self.wasm_import_header(target) + """
+export class VecOrSliceDef {
+    public dataptr: number;
+    public datalen: number;
+    public stride: number;
+    public constructor(dataptr: number, datalen: number, stride: number) {
+        this.dataptr = dataptr;
+        this.datalen = datalen;
+        this.stride = stride;
+    }
+}
+
+/*
+TODO: load WASM file
+static {
+    System.loadLibrary(\"lightningjni\");
+    init(java.lang.Enum.class, VecOrSliceDef.class);
+    init_class_cache();
+}
+
+static native void init(java.lang.Class c, java.lang.Class slicedef);
+static native void init_class_cache();
+
+public static native boolean deref_bool(long ptr);
+public static native long deref_long(long ptr);
+public static native void free_heap_ptr(long ptr);
+public static native byte[] read_bytes(long ptr, long len);
+public static native byte[] get_u8_slice_bytes(long slice_ptr);
+public static native long bytes_to_u8_vec(byte[] bytes);
+public static native long new_txpointer_copy_data(byte[] txdata);
+public static native void txpointer_free(long ptr);
+public static native byte[] txpointer_get_buffer(long ptr);
+public static native long vec_slice_len(long vec);
+public static native long new_empty_slice_vec();
+*/
+
+"""
+
         self.common_base = """
             export default class CommonBase {
                 ptr: number;
-                ptrs_to: object[] = new Array(); // new LinkedList(); TODO: build linked list implementation
+                ptrs_to: object[] = []; // new LinkedList(); TODO: build linked list implementation
                 protected constructor(ptr: number) { this.ptr = ptr; }
                 public _test_only_get_ptr(): number { return this.ptr; }
+                protected finalize() {
+                    // TODO: finalize myself
+                }
             }
-        """
+"""
 
         self.c_file_pfx = """#include <rust_types.h>
 #include <stdatomic.h>
@@ -19,7 +85,7 @@ void *memcpy(void *dest, const void *src, size_t n);
 int memcmp(const void *s1, const void *s2, size_t n);
 
 void __attribute__((noreturn)) abort(void);
-void assert(scalar expression);
+void assert(bool expression);
 """
 
         if not DEBUG:
@@ -132,7 +198,11 @@ _Static_assert(sizeof(void*) == 4, "Pointers mut be 32 bits");
 
 typedef struct int64_tArray {uint32_t len;int64_t *ptr;} int64_tArray;
 typedef struct uint32_tArray {uint32_t len;int32_t *ptr;} uint32_tArray;
+typedef struct ptrArray {uint32_t len;int32_t *ptr;} ptrArray;
 typedef struct int8_tArray {uint32_t len;int8_t *ptr;} int8_tArray;
+typedef struct jstring {} jstring;
+
+jstring conv_owned_string(const char* _src) { jstring a; return a; }
 
 typedef bool jboolean;
 
@@ -146,15 +216,15 @@ import * as bindings from '../bindings' // TODO: figure out location
         self.c_fn_ty_pfx = ""
         self.c_fn_name_pfx = ""
         self.c_fn_args_pfx = "void* ctx_TODO"
-        self.file_ext = ""
+        self.file_ext = ".ts"
         self.ptr_c_ty = "uint32_t"
-        self.ptr_native_ty = "uint32_t"
+        self.ptr_native_ty = "number" # "uint32_t"
         self.result_c_ty = "uint32_t"
-        self.ptr_arr = "uint32_tArray"
+        self.owned_str_to_c_call = ("conv_owned_string(", ")")
+        self.ptr_arr = "ptrArray"
         self.get_native_arr_len_call = ("", ".len")
-        self.get_native_arr_ptr_call = ("", ".ptr")
 
-    def release_native_arr_ptr_call(self, arr_var, arr_ptr_var):
+    def release_native_arr_ptr_call(self, ty_info, arr_var, arr_ptr_var):
         return None
     def create_native_arr_call(self, arr_len, ty_info):
         if ty_info.c_ty == "int8_tArray":
@@ -163,6 +233,9 @@ import * as bindings from '../bindings' // TODO: figure out location
             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int64_t), \"Native " + ty_info.c_ty + " Bytes\") }"
         elif ty_info.c_ty == "uint32_tArray":
             return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int32_t), \"Native " + ty_info.c_ty + " Bytes\") }"
+        elif ty_info.c_ty == "ptrArray":
+            assert ty_info.subty is not None and ty_info.subty.c_ty.endswith("Array")
+            return "{ .len = " + arr_len + ", .ptr = MALLOC(" + arr_len + " * sizeof(int32_t), \"Native Object Bytes\") }"
         else:
             print("Need to create arr!", ty_info.c_ty)
             return ty_info.c_ty
@@ -181,22 +254,50 @@ import * as bindings from '../bindings' // TODO: figure out location
             return "(" + ty_info.subty.c_ty + "*) " + arr_name + ".ptr"
     def get_native_arr_elem(self, arr_name, idxc, ty_info):
         assert False # Only called if above is None
+    def get_native_arr_ptr_call(self, ty_info):
+        if ty_info.subty is not None:
+            return ("(" + ty_info.subty.c_ty + "*)", ".ptr")
+        return ("(" + ty_info.c_ty + "*)", ".ptr")
+    def get_native_arr_entry_call(self, ty_info, arr_name, idxc, entry_access):
+        return None
     def cleanup_native_arr_ref_contents(self, arr_name, dest_name, arr_len, ty_info):
         if ty_info.c_ty == "int8_tArray":
             return None
         else:
             return None
 
-    def init_str(self, c_array_class_caches):
+
+    def wasm_import_header(self, target):
+        if target == Target.NODEJS:
+            return """
+const path = require('path').join(__dirname, 'bindings.wasm');
+const bytes = require('fs').readFileSync(path);
+let imports = {};
+// add all exports to dictionary and move down?
+// use `module.exports`?
+// imports['./bindings.js'] = require('./bindings.js');
+
+const wasmModule = new WebAssembly.Module(bytes);
+const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
+// module.exports = wasmInstance.exports;
+const wasm = wasmInstance.exports;
+"""
+        return ''
+
+    def init_str(self):
         return ""
 
     def native_c_unitary_enum_map(self, struct_name, variants):
         out_c = "static inline " + struct_name + " " + struct_name + "_from_js(int32_t ord) {\n"
         out_c = out_c + "\tswitch (ord) {\n"
         ord_v = 0
+
+        out_typescript_enum_fields = ""
+
         for var in variants:
             out_c = out_c + "\t\tcase %d: return %s;\n" % (ord_v, var)
             ord_v = ord_v + 1
+            out_typescript_enum_fields += f"{var},\n\t\t\t\t"
         out_c = out_c + "\t}\n"
         out_c = out_c + "\tabort();\n"
         out_c = out_c + "}\n"
@@ -210,16 +311,20 @@ import * as bindings from '../bindings' // TODO: figure out location
         out_c = out_c + "\t\tdefault: abort();\n"
         out_c = out_c + "\t}\n"
         out_c = out_c + "}\n"
-        return (out_c, "", "")
+
+        out_typescript_enum = f"""
+            export enum {struct_name} {{
+                {out_typescript_enum_fields}
+            }}
+"""
+
+        return (out_c, out_typescript_enum, "")
 
     def c_unitary_enum_to_native_call(self, ty_info):
         return (ty_info.rust_obj + "_to_js(", ")")
     def native_unitary_enum_to_c_call(self, ty_info):
         return (ty_info.rust_obj + "_from_js(", ")")
 
-    def c_complex_enum_pfx(self, struct_name, variants, init_meth_jty_strs):
-        return ""
-
     def c_complex_enum_pass_ty(self, struct_name):
         return "uint32_t"
 
@@ -229,5 +334,416 @@ import * as bindings from '../bindings' // TODO: figure out location
             ret = ret + "; (void) " + param
         return ret
 
-    def native_c_map_trait(self, struct_name, field_var_convs, field_fn_lines):
-        return ("", "")
+    def native_c_map_trait(self, struct_name, field_var_conversions, field_function_lines):
+        out_typescript_bindings = "\n\n\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: START\n\n"
+
+        constructor_arguments = ""
+        super_instantiator = ""
+        pointer_to_adder = ""
+        impl_constructor_arguments = ""
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                constructor_arguments += f", {first_to_lower(var.arg_name)}?: {var.java_hu_ty}"
+                impl_constructor_arguments += f", {var.arg_name}: {var.java_hu_ty}"
+                if var.from_hu_conv is not None:
+                    super_instantiator += ", " + var.from_hu_conv[0]
+                    if var.from_hu_conv[1] != "":
+                        pointer_to_adder += var.from_hu_conv[1] + ";\n"
+                else:
+                    super_instantiator += ", " + first_to_lower(var.arg_name)
+            else:
+                constructor_arguments += f", {first_to_lower(var[1])}?: bindings.{var[0]}"
+                super_instantiator += ", " + first_to_lower(var[1])
+                pointer_to_adder += "this.ptrs_to.push(" + first_to_lower(var[1]) + ");\n"
+                impl_constructor_arguments += f", {first_to_lower(var[1])}_impl: {var[0].replace('LDK', '')}.{var[0].replace('LDK', '')}Interface"
+
+        # BUILD INTERFACE METHODS
+        out_java_interface = ""
+        out_interface_implementation_overrides = ""
+        java_methods = []
+        for fn_line in field_function_lines:
+            java_method_descriptor = ""
+            if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
+                out_java_interface += fn_line.fn_name + "("
+                out_interface_implementation_overrides += f"{fn_line.fn_name} ("
+
+                for idx, arg_conv_info in enumerate(fn_line.args_ty):
+                    if idx >= 1:
+                        out_java_interface += ", "
+                        out_interface_implementation_overrides += ", "
+                    out_java_interface += f"{arg_conv_info.arg_name}: {arg_conv_info.java_hu_ty}"
+                    out_interface_implementation_overrides += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
+                    java_method_descriptor += arg_conv_info.java_fn_ty_arg
+                out_java_interface += f"): {fn_line.ret_ty_info.java_hu_ty};\n\t\t\t\t"
+                java_method_descriptor += ")" + fn_line.ret_ty_info.java_fn_ty_arg
+                java_methods.append((fn_line.fn_name, java_method_descriptor))
+
+                out_interface_implementation_overrides += f"): {fn_line.ret_ty_info.java_ty} {{\n"
+
+                interface_method_override_inset = "\t\t\t\t\t\t"
+                interface_implementation_inset = "\t\t\t\t\t\t\t"
+                for arg_info in fn_line.args_ty:
+                    if arg_info.to_hu_conv is not None:
+                        out_interface_implementation_overrides += interface_implementation_inset + arg_info.to_hu_conv.replace("\n", "\n\t\t\t\t") + "\n"
+
+                if fn_line.ret_ty_info.java_ty != "void":
+                    out_interface_implementation_overrides += interface_implementation_inset + fn_line.ret_ty_info.java_hu_ty + " ret = arg." + fn_line.fn_name + "("
+                else:
+                    out_interface_implementation_overrides += f"{interface_implementation_inset}arg." + fn_line.fn_name + "("
+
+                for idx, arg_info in enumerate(fn_line.args_ty):
+                    if idx != 0:
+                        out_interface_implementation_overrides += ", "
+                    if arg_info.to_hu_conv_name is not None:
+                        out_interface_implementation_overrides += arg_info.to_hu_conv_name
+                    else:
+                        out_interface_implementation_overrides += arg_info.arg_name
+
+                out_interface_implementation_overrides += ");\n"
+                if fn_line.ret_ty_info.java_ty != "void":
+                    if fn_line.ret_ty_info.from_hu_conv is not None:
+                        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"
+                        if fn_line.ret_ty_info.from_hu_conv[1] != "":
+                            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"
+                        #if fn_line.ret_ty_info.rust_obj in result_types:
+                        # XXX: We need to handle this in conversion logic so that its cross-language!
+                        # Avoid double-free by breaking the result - we should learn to clone these and then we can be safe instead
+                        #    out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\tret.ptr = 0;\n"
+                        out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn result;\n"
+                    else:
+                        out_interface_implementation_overrides = out_interface_implementation_overrides + "\t\t\t\treturn ret;\n"
+                out_interface_implementation_overrides += f"{interface_method_override_inset}}},\n\n{interface_method_override_inset}"
+
+        trait_constructor_arguments = ""
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                trait_constructor_arguments += ", " + var.arg_name
+            else:
+                trait_constructor_arguments += ", " + var[1] + ".new_impl(" + var[1] + "_impl).bindings_instance"
+
+        out_typescript_human = f"""
+            {self.hu_struct_file_prefix}
+
+            export class {struct_name.replace("LDK","")} extends CommonBase {{
+
+                bindings_instance?: bindings.{struct_name};
+
+                constructor(ptr?: number, arg?: bindings.{struct_name}{constructor_arguments}) {{
+                    if (Number.isFinite(ptr)) {{
+                                       super(ptr);
+                                       this.bindings_instance = null;
+                                   }} else {{
+                                       // TODO: private constructor instantiation
+                                       super(bindings.{struct_name}_new(arg{super_instantiator}));
+                                       this.ptrs_to.push(arg);
+                                       {pointer_to_adder}
+                                   }}
+                }}
+
+                protected finalize() {{
+                    if (this.ptr != 0) {{
+                        bindings.{struct_name.replace("LDK","")}_free(this.ptr);
+                    }}
+                    super.finalize();
+                }}
+
+                static new_impl(arg: {struct_name.replace("LDK", "")}Interface{impl_constructor_arguments}): {struct_name.replace("LDK", "")} {{
+                    const impl_holder: {struct_name}Holder = new {struct_name}Holder();
+                    let structImplementation = <bindings.{struct_name}>{{
+                        // todo: in-line interface filling
+                        {out_interface_implementation_overrides}
+                    }};
+                    impl_holder.held = new {struct_name.replace("LDK", "")} (null, structImplementation{trait_constructor_arguments});
+                }}
+            }}
+
+            export interface {struct_name.replace("LDK", "")}Interface {{
+                {out_java_interface}
+            }}
+
+            class {struct_name}Holder {{
+                held: {struct_name.replace("LDK", "")};
+            }}
+"""
+
+        out_typescript_bindings += "\t\texport interface " + struct_name + " {\n"
+        java_meths = []
+        for fn_line in field_function_lines:
+            if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
+                out_typescript_bindings += f"\t\t\t{fn_line.fn_name} ("
+
+                for idx, arg_conv_info in enumerate(fn_line.args_ty):
+                    if idx >= 1:
+                        out_typescript_bindings = out_typescript_bindings + ", "
+                    out_typescript_bindings += f"{arg_conv_info.arg_name}: {arg_conv_info.java_ty}"
+
+                out_typescript_bindings += f"): {fn_line.ret_ty_info.java_ty};\n"
+
+        out_typescript_bindings = out_typescript_bindings + "\t\t}\n\n"
+
+        out_typescript_bindings += f"\t\texport function {struct_name}_new(impl: {struct_name}"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                out_typescript_bindings += f", {var.arg_name}: {var.java_ty}"
+            else:
+                out_typescript_bindings += f", {var[1]}: {var[0]}"
+
+        out_typescript_bindings += f"""): number {{
+            throw new Error('unimplemented'); // TODO: bind to WASM
+        }}
+"""
+
+        out_typescript_bindings += '\n// OUT_TYPESCRIPT_BINDINGS :: MAP_TRAIT :: END\n\n\n'
+
+        # Now that we've written out our java code (and created java_meths), generate C
+        out_c = "typedef struct " + struct_name + "_JCalls {\n"
+        out_c = out_c + "\tatomic_size_t refcnt;\n"
+        out_c = out_c + "\t// TODO: Object pointer o;\n"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                # We're a regular ol' field
+                pass
+            else:
+                # We're a supertrait
+                out_c = out_c + "\t" + var[0] + "_JCalls* " + var[1] + ";\n"
+        for fn in field_function_lines:
+            if fn.fn_name != "free" and fn.fn_name != "clone":
+                out_c = out_c + "\t// TODO: Some kind of method pointer " + fn.fn_name + "_meth;\n"
+        out_c = out_c + "} " + struct_name + "_JCalls;\n"
+
+        for fn_line in field_function_lines:
+            if fn_line.fn_name == "free":
+                out_c = out_c + "static void " + struct_name + "_JCalls_free(void* this_arg) {\n"
+                out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
+                out_c = out_c + "\tif (atomic_fetch_sub_explicit(&j_calls->refcnt, 1, memory_order_acquire) == 1) {\n"
+                out_c = out_c + "\t\t// TODO: do any release required for j_calls->o (refcnt-- in java, but may be redundant)\n"
+                out_c = out_c + "\t\tFREE(j_calls);\n"
+                out_c = out_c + "\t}\n}\n"
+
+        for idx, fn_line in enumerate(field_function_lines):
+            if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
+                assert fn_line.ret_ty_info.ty_info.get_full_rust_ty()[1] == ""
+                out_c = out_c + fn_line.ret_ty_info.ty_info.get_full_rust_ty()[0] + " " + fn_line.fn_name + "_jcall("
+                if fn_line.self_is_const:
+                    out_c = out_c + "const void* this_arg"
+                else:
+                    out_c = out_c + "void* this_arg"
+
+                for idx, arg in enumerate(fn_line.args_ty):
+                    out_c = out_c + ", " + arg.ty_info.get_full_rust_ty()[0] + " " + arg.arg_name + arg.ty_info.get_full_rust_ty()[1]
+
+                out_c = out_c + ") {\n"
+                out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
+
+                for arg_info in fn_line.args_ty:
+                    if arg_info.ret_conv is not None:
+                        out_c = out_c + "\t" + arg_info.ret_conv[0].replace('\n', '\n\t')
+                        out_c = out_c + arg_info.arg_name
+                        out_c = out_c + arg_info.ret_conv[1].replace('\n', '\n\t') + "\n"
+
+                out_c = out_c + "\t//TODO: jobject obj = get object we can call against on j_calls->o\n"
+                if fn_line.ret_ty_info.c_ty.endswith("Array"):
+                    out_c = out_c + "\t" + fn_line.ret_ty_info.c_ty + " arg; // TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning an object"
+                elif fn_line.ret_ty_info.java_ty == "void":
+                    out_c = out_c + "\treturn; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj"
+                elif not fn_line.ret_ty_info.passed_as_ptr:
+                    out_c = out_c + "\treturn 0; //TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning " + fn_line.ret_ty_info.java_ty
+                else:
+                    out_c = out_c + "\t" + fn_line.ret_ty_info.rust_obj + "* ret; // TODO: Call " + fn_line.fn_name + " on j_calls with instance obj, returning a pointer"
+
+                for idx, arg_info in enumerate(fn_line.args_ty):
+                    if arg_info.ret_conv is not None:
+                        out_c = out_c + ", " + arg_info.ret_conv_name
+                    else:
+                        out_c = out_c + ", " + arg_info.arg_name
+                out_c = out_c + ");\n"
+                if fn_line.ret_ty_info.arg_conv is not None:
+                    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"
+
+                out_c = out_c + "}\n"
+
+        # Write out a clone function whether we need one or not, as we use them in moving to rust
+        out_c = out_c + "static void* " + struct_name + "_JCalls_clone(const void* this_arg) {\n"
+        out_c = out_c + "\t" + struct_name + "_JCalls *j_calls = (" + struct_name + "_JCalls*) this_arg;\n"
+        out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->refcnt, 1, memory_order_release);\n"
+        for var in field_var_conversions:
+            if not isinstance(var, ConvInfo):
+                out_c = out_c + "\tatomic_fetch_add_explicit(&j_calls->" + var[1] + "->refcnt, 1, memory_order_release);\n"
+        out_c = out_c + "\treturn (void*) this_arg;\n"
+        out_c = out_c + "}\n"
+
+        out_c = out_c + "static inline " + struct_name + " " + struct_name + "_init (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                out_c = out_c + ", " + var.c_ty + " " + var.arg_name
+            else:
+                out_c = out_c + ", /*TODO: JS Object Reference */void* " + var[1]
+        out_c = out_c + ") {\n"
+
+        out_c = out_c + "\t" + struct_name + "_JCalls *calls = MALLOC(sizeof(" + struct_name + "_JCalls), \"" + struct_name + "_JCalls\");\n"
+        out_c = out_c + "\tatomic_init(&calls->refcnt, 1);\n"
+        out_c = out_c + "\t//TODO: Assign calls->o from o\n"
+
+        for (fn_name, java_meth_descr) in java_meths:
+            if fn_name != "free" and fn_name != "clone":
+                out_c = out_c + "\tcalls->" + fn_name + "_meth = (*env)->GetMethodID(env, c, \"" + fn_name + "\", \"" + java_meth_descr + "\");\n"
+                out_c = out_c + "\tCHECK(calls->" + fn_name + "_meth != NULL);\n"
+
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo) and var.arg_conv is not None:
+                out_c = out_c + "\n\t" + var.arg_conv.replace("\n", "\n\t") +"\n"
+        out_c = out_c + "\n\t" + struct_name + " ret = {\n"
+        out_c = out_c + "\t\t.this_arg = (void*) calls,\n"
+        for fn_line in field_function_lines:
+            if fn_line.fn_name != "free" and fn_line.fn_name != "clone":
+                out_c = out_c + "\t\t." + fn_line.fn_name + " = " + fn_line.fn_name + "_jcall,\n"
+            elif fn_line.fn_name == "free":
+                out_c = out_c + "\t\t.free = " + struct_name + "_JCalls_free,\n"
+            else:
+                out_c = out_c + "\t\t.clone = " + struct_name + "_JCalls_clone,\n"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                if var.arg_conv_name is not None:
+                    out_c = out_c + "\t\t." + var.arg_name + " = " + var.arg_conv_name + ",\n"
+                    out_c = out_c + "\t\t.set_" + var.arg_name + " = NULL,\n"
+                else:
+                    out_c = out_c + "\t\t." + var.var_name + " = " + var.var_name + ",\n"
+                    out_c = out_c + "\t\t.set_" + var.var_name + " = NULL,\n"
+            else:
+                out_c = out_c + "\t\t." + var[1] + " = " + var[0] + "_init(NULL, " + var[1] + "),\n"
+        out_c = out_c + "\t};\n"
+        for var in field_var_conversions:
+            if not isinstance(var, ConvInfo):
+                out_c = out_c + "\tcalls->" + var[1] + " = ret." + var[1] + ".this_arg;\n"
+        out_c = out_c + "\treturn ret;\n"
+        out_c = out_c + "}\n"
+
+        out_c = out_c + self.c_fn_ty_pfx + "long " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1new (" + self.c_fn_args_pfx + ", /*TODO: JS Object Reference */void* o"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                out_c = out_c + ", " + var.c_ty + " " + var.arg_name
+            else:
+                out_c = out_c + ", /*TODO: JS Object Reference */ void* " + var[1]
+        out_c = out_c + ") {\n"
+        out_c = out_c + "\t" + struct_name + " *res_ptr = MALLOC(sizeof(" + struct_name + "), \"" + struct_name + "\");\n"
+        out_c = out_c + "\t*res_ptr = " + struct_name + "_init(NULL, o"
+        for var in field_var_conversions:
+            if isinstance(var, ConvInfo):
+                out_c = out_c + ", " + var.arg_name
+            else:
+                out_c = out_c + ", " + var[1]
+        out_c = out_c + ");\n"
+        out_c = out_c + "\treturn (long)res_ptr;\n"
+        out_c = out_c + "}\n"
+
+        return (out_typescript_bindings, out_typescript_human, out_c)
+
+    def trait_struct_inc_refcnt(self, ty_info):
+        return ""
+
+    def map_complex_enum(self, struct_name, variant_list, camel_to_snake):
+        java_hu_type = struct_name.replace("LDK", "")
+
+        out_java_enum = ""
+        out_java = ""
+        out_c = ""
+
+        out_java_enum += (self.hu_struct_file_prefix)
+        out_java_enum += ("export default class " + java_hu_type + " extends CommonBase {\n")
+        out_java_enum += ("\tprotected constructor(_dummy: object, ptr: number) { super(ptr); }\n")
+        out_java_enum += ("\tprotected finalize() {\n")
+        out_java_enum += ("\t\tsuper.finalize();\n")
+        out_java_enum += ("\t\tif (this.ptr != 0) { bindings." + java_hu_type + "_free(this.ptr); }\n")
+        out_java_enum += ("\t}\n")
+        out_java_enum += f"\tstatic constr_from_ptr(ptr: number): {java_hu_type} {{\n"
+        out_java_enum += (f"\t\tconst raw_val: bindings.{struct_name} = bindings." + struct_name + "_ref_from_ptr(ptr);\n")
+        java_hu_subclasses = ""
+
+        out_java +=  ("\tpublic static class " + struct_name + " {\n")
+        out_java +=  ("\t\tprivate " + struct_name + "() {}\n")
+        for var in variant_list:
+            out_java +=  ("\t\texport class " + var.var_name + " extends " + struct_name + " {\n")
+            java_hu_subclasses = java_hu_subclasses + "export class " + var.var_name + " extends " + java_hu_type + " {\n"
+            out_java_enum += ("\t\tif (raw_val instanceof bindings." + struct_name + "." + var.var_name + ") {\n")
+            out_java_enum += ("\t\t\treturn new " + var.var_name + "(this.ptr, raw_val);\n")
+            init_meth_params = ""
+            init_meth_body = ""
+            hu_conv_body = ""
+            for idx, field_ty in enumerate(var.fields):
+                out_java += ("\t\t\tpublic " + field_ty.java_ty + " " + field_ty.arg_name + ";\n")
+                java_hu_subclasses = java_hu_subclasses + "\tpublic " + field_ty.arg_name + f": {field_ty.java_hu_ty};\n"
+                if field_ty.to_hu_conv is not None:
+                    hu_conv_body = hu_conv_body + "\t\tconst " + field_ty.arg_name + f": {field_ty.java_ty} = obj." + field_ty.arg_name + ";\n"
+                    hu_conv_body = hu_conv_body + "\t\t" + field_ty.to_hu_conv.replace("\n", "\n\t\t\t") + "\n"
+                    hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = " + field_ty.to_hu_conv_name + ";\n"
+                else:
+                    hu_conv_body = hu_conv_body + "\t\tthis." + field_ty.arg_name + " = obj." + field_ty.arg_name + ";\n"
+                if idx > 0:
+                    init_meth_params = init_meth_params + ", "
+                init_meth_params = init_meth_params + field_ty.java_ty + " " + field_ty.arg_name
+                init_meth_body = init_meth_body + "this." + field_ty.arg_name + " = " + field_ty.arg_name + "; "
+            out_java +=  ("\t\t\t" + var.var_name + "(" + init_meth_params + ") { ")
+            out_java +=  (init_meth_body)
+            out_java +=  ("}\n")
+            out_java += ("\t\t}\n")
+            out_java_enum += ("\t\t}\n")
+            java_hu_subclasses = java_hu_subclasses + "\tprivate constructor(ptr: number, obj: bindings." + struct_name + "." + var.var_name + ") {\n\t\tsuper(null, ptr);\n"
+            java_hu_subclasses = java_hu_subclasses + hu_conv_body
+            java_hu_subclasses = java_hu_subclasses + "\t}\n}\n"
+        out_java += ("\t\tstatic native void init();\n")
+        out_java += ("\t}\n")
+        out_java_enum += ("\t\tthrow new Error('oops, this should be unreachable'); // Unreachable without extending the (internal) bindings interface\n\t}\n\n")
+        out_java += ("\tstatic { " + struct_name + ".init(); }\n")
+        out_java += ("\tpublic static native " + struct_name + " " + struct_name + "_ref_from_ptr(long ptr);\n");
+
+        out_c += (self.c_fn_ty_pfx + self.c_complex_enum_pass_ty(struct_name) + " " + self.c_fn_name_pfx + struct_name.replace("_", "_1") + "_1ref_1from_1ptr (" + self.c_fn_args_pfx + ", " + self.ptr_c_ty + " ptr) {\n")
+        out_c += ("\t" + struct_name + " *obj = (" + struct_name + "*)ptr;\n")
+        out_c += ("\tswitch(obj->tag) {\n")
+        for var in variant_list:
+            out_c += ("\t\tcase " + struct_name + "_" + var.var_name + ": {\n")
+            c_params = []
+            for idx, field_map in enumerate(var.fields):
+                if field_map.ret_conv is not None:
+                    out_c += ("\t\t\t" + field_map.ret_conv[0].replace("\n", "\n\t\t\t"))
+                    out_c += ("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
+                    out_c += (field_map.ret_conv[1].replace("\n", "\n\t\t\t") + "\n")
+                    c_params.append(field_map.ret_conv_name)
+                else:
+                    c_params.append("obj->" + camel_to_snake(var.var_name) + "." + field_map.arg_name)
+            out_c += ("\t\t\treturn " + self.c_constr_native_complex_enum(struct_name, var.var_name, c_params) + ";\n")
+            out_c += ("\t\t}\n")
+        out_c += ("\t\tdefault: abort();\n")
+        out_c += ("\t}\n}\n")
+        out_java_enum += ("}\n")
+        out_java_enum += (java_hu_subclasses)
+        return (out_java, out_java_enum, out_c)
+
+    def map_opaque_struct(self, struct_name):
+        implementations = ""
+        method_header = ""
+        if struct_name.startswith("LDKLocked"):
+            implementations += "implements AutoCloseable "
+            method_header = """
+                public close() {
+"""
+        else:
+            method_header = """
+                protected finalize() {
+                    super.finalize();
+"""
+
+        out_opaque_struct_human = f"""
+            {self.hu_struct_file_prefix}
+
+            export default class {struct_name.replace("LDK","")} extends CommonBase {implementations}{{
+                constructor(_dummy: object, ptr: number) {{
+                    super(ptr);
+                }}
+
+                {method_header}
+                    if (this.ptr != 0) {{
+                        bindings.{struct_name.replace("LDK","")}_free(this.ptr);
+                    }}
+                }}
+"""
+        return out_opaque_struct_human