.gitmodules

@@ -1,3 +1,6 @@
 [submodule "proxmoxaas-common-lib"]
 	path = proxmoxaas-common-lib
 	url = https://git.tronnet.net/tronnet/proxmoxaas-common-lib
+[submodule "WFA-JS"]
+	path = WFA-JS
+	url = https://git.tronnet.net/alu/WFA-JS

Makefile

@@ -1,11 +1,15 @@
-.PHONY: build test clean
+.PHONY: build test clean wfa-js
 
-build: clean
+build: clean wfa-js
 	@echo "======================== Building Binary ======================="
 # resolve symbolic links in web by copying it into dist/web/
 	cp -rL web/ dist/web/
 	CGO_ENABLED=0 go build -tags release -ldflags="-s -w" -v -o dist/ .
 
+wfa-js:
+	$(MAKE) -C WFA-JS
+	cp -f WFA-JS/dist/* web/modules
+
 test: clean
 	go run .
 

web/modules/wfa.js

@@ -1,2 +1,579 @@
-(()=>{if(typeof global!="undefined");else if(typeof window!="undefined")window.global=window;else if(typeof self!="undefined")self.global=self;else throw new Error("cannot export Go (neither global, window nor self is defined)");!global.require&&typeof require!="undefined"&&(global.require=require),!global.fs&&global.require&&(global.fs=require("node:fs"));const e=()=>{const e=new Error("not implemented");return e.code="ENOSYS",e};if(!global.fs){let t="";global.fs={constants:{O_WRONLY:-1,O_RDWR:-1,O_CREAT:-1,O_TRUNC:-1,O_APPEND:-1,O_EXCL:-1},writeSync(e,n){t+=s.decode(n);const o=t.lastIndexOf(`
-`);return o!=-1&&(console.log(t.substr(0,o)),t=t.substr(o+1)),n.length},write(t,n,s,o,i,a){if(s!==0||o!==n.length||i!==null){a(e());return}const r=this.writeSync(t,n);a(null,r)},chmod(t,n,s){s(e())},chown(t,n,s,o){o(e())},close(t,n){n(e())},fchmod(t,n,s){s(e())},fchown(t,n,s,o){o(e())},fstat(t,n){n(e())},fsync(e,t){t(null)},ftruncate(t,n,s){s(e())},lchown(t,n,s,o){o(e())},link(t,n,s){s(e())},lstat(t,n){n(e())},mkdir(t,n,s){s(e())},open(t,n,s,o){o(e())},read(t,n,s,o,i,a){a(e())},readdir(t,n){n(e())},readlink(t,n){n(e())},rename(t,n,s){s(e())},rmdir(t,n){n(e())},stat(t,n){n(e())},symlink(t,n,s){s(e())},truncate(t,n,s){s(e())},unlink(t,n){n(e())},utimes(t,n,s,o){o(e())}}}if(global.process||(global.process={getuid(){return-1},getgid(){return-1},geteuid(){return-1},getegid(){return-1},getgroups(){throw e()},pid:-1,ppid:-1,umask(){throw e()},cwd(){throw e()},chdir(){throw e()}}),!global.crypto){const e=require("node:crypto");global.crypto={getRandomValues(t){e.randomFillSync(t)}}}global.performance||(global.performance={now(){const[e,t]=process.hrtime();return e*1e3+t/1e6}}),global.TextEncoder||(global.TextEncoder=require("node:util").TextEncoder),global.TextDecoder||(global.TextDecoder=require("node:util").TextDecoder);const i=new TextEncoder("utf-8"),s=new TextDecoder("utf-8");let t=new DataView(new ArrayBuffer(8));var o=[];const n={};if(global.Go=class{constructor(){this._callbackTimeouts=new Map,this._nextCallbackTimeoutID=1;const e=()=>new DataView(this._inst.exports.memory.buffer),a=e=>{t.setBigInt64(0,e,!0);const n=t.getFloat64(0,!0);if(n===0)return 0[0];if(!isNaN(n))return n;const s=e&4294967295n;return this._values[s]},h=t=>{let n=e().getBigUint64(t,!0);return a(n)},l=e=>{const s=2146959360n;if(typeof e=="number")return isNaN(e)?s<<32n:e===0?s<<32n|1n:(t.setFloat64(0,e,!0),t.getBigInt64(0,!0));switch(e){case 0[0]:return 0n;case null:return s<<32n|2n;case!0:return s<<32n|3n;case!1:return s<<32n|4n}let n=this._ids.get(e);n===0[0]&&(n=this._idPool.pop(),n===0[0]&&(n=BigInt(this._values.length)),this._values[n]=e,this._goRefCounts[n]=0,this._ids.set(e,n)),this._goRefCounts[n]++;let o=1n;switch(typeof e){case"string":o=2n;break;case"symbol":o=3n;break;case"function":o=4n;break}return n|(s|o)<<32n},r=(t,n)=>{let s=l(n);e().setBigUint64(t,s,!0)},d=(e,t)=>new Uint8Array(this._inst.exports.memory.buffer,e,t),u=(e,t)=>{const s=new Array(t);for(let n=0;n<t;n++)s[n]=h(e+n*8);return s},c=(e,t)=>s.decode(new DataView(this._inst.exports.memory.buffer,e,t)),m=Date.now()-performance.now();this.importObject={wasi_snapshot_preview1:{fd_write:function(t,n,i,a){let r=0;if(t==1)for(let t=0;t<i;t++){let a=n+t*8,l=e().getUint32(a+0,!0),c=e().getUint32(a+4,!0);r+=c;for(let t=0;t<c;t++){let n=e().getUint8(l+t);if(n==13);else if(n==10){let e=s.decode(new Uint8Array(o));o=[],console.log(e)}else o.push(n)}}else console.error("invalid file descriptor:",t);return e().setUint32(a,r,!0),0},fd_close:()=>0,fd_fdstat_get:()=>0,fd_seek:()=>0,proc_exit:e=>{throw this.exited=!0,this.exitCode=e,this._resolveExitPromise(),n},random_get:(e,t)=>(crypto.getRandomValues(d(e,t)),0)},gojs:{"runtime.ticks":()=>BigInt((m+performance.now())*1e6),"runtime.sleepTicks":e=>{setTimeout(()=>{if(this.exited)return;try{this._inst.exports.go_scheduler()}catch(e){if(e!==n)throw e}},Number(e)/1e6)},"syscall/js.finalizeRef":e=>{const t=e&4294967295n;if(this._goRefCounts?.[t]!==0[0]){if(this._goRefCounts[t]--,this._goRefCounts[t]===0){const e=this._values[t];this._values[t]=null,this._ids.delete(e),this._idPool.push(t)}}else console.error("syscall/js.finalizeRef: unknown id",t)},"syscall/js.stringVal":(e,t)=>{e>>>=0;const n=c(e,t);return l(n)},"syscall/js.valueGet":(e,t,n)=>{let s=c(t,n),o=a(e),i=Reflect.get(o,s);return l(i)},"syscall/js.valueSet":(e,t,n,s)=>{const o=a(e),i=c(t,n),r=a(s);Reflect.set(o,i,r)},"syscall/js.valueDelete":(e,t,n)=>{const s=a(e),o=c(t,n);Reflect.deleteProperty(s,o)},"syscall/js.valueIndex":(e,t)=>l(Reflect.get(a(e),t)),"syscall/js.valueSetIndex":(e,t,n)=>{Reflect.set(a(e),t,a(n))},"syscall/js.valueCall":(t,n,s,o,i,l,d)=>{const h=a(n),m=c(s,o),f=u(i,l,d);try{const n=Reflect.get(h,m);r(t,Reflect.apply(n,h,f)),e().setUint8(t+8,1)}catch(n){r(t,n),e().setUint8(t+8,0)}},"syscall/js.valueInvoke":(t,n,s,o,i)=>{try{const c=a(n),l=u(s,o,i);r(t,Reflect.apply(c,0[0],l)),e().setUint8(t+8,1)}catch(n){r(t,n),e().setUint8(t+8,0)}},"syscall/js.valueNew":(t,n,s,o,i)=>{const c=a(n),l=u(s,o,i);try{r(t,Reflect.construct(c,l)),e().setUint8(t+8,1)}catch(n){r(t,n),e().setUint8(t+8,0)}},"syscall/js.valueLength":e=>a(e).length,"syscall/js.valuePrepareString":(t,n)=>{const o=String(a(n)),s=i.encode(o);r(t,s),e().setInt32(t+8,s.length,!0)},"syscall/js.valueLoadString":(e,t,n,s)=>{const o=a(e);d(t,n,s).set(o)},"syscall/js.valueInstanceOf":(e,t)=>a(e)instanceof a(t),"syscall/js.copyBytesToGo":(t,n,s,o,i)=>{let h=t,c=t+4;const l=d(n,s),r=a(i);if(!(r instanceof Uint8Array||r instanceof Uint8ClampedArray)){e().setUint8(c,0);return}const u=r.subarray(0,l.length);l.set(u),e
Line truncated
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// This file has been modified for use by the TinyGo compiler.
+
+(() => {
+	// Map multiple JavaScript environments to a single common API,
+	// preferring web standards over Node.js API.
+	//
+	// Environments considered:
+	// - Browsers
+	// - Node.js
+	// - Electron
+	// - Parcel
+
+	if (typeof global !== "undefined") {
+		// global already exists
+	} else if (typeof window !== "undefined") {
+		window.global = window;
+	} else if (typeof self !== "undefined") {
+		self.global = self;
+	} else {
+		throw new Error("cannot export Go (neither global, window nor self is defined)");
+	}
+
+	if (!global.require && typeof require !== "undefined") {
+		global.require = require;
+	}
+
+	if (!global.fs && global.require) {
+		global.fs = require("node:fs");
+	}
+
+	const enosys = () => {
+		const err = new Error("not implemented");
+		err.code = "ENOSYS";
+		return err;
+	};
+
+	if (!global.fs) {
+		let outputBuf = "";
+		global.fs = {
+			constants: { O_WRONLY: -1, O_RDWR: -1, O_CREAT: -1, O_TRUNC: -1, O_APPEND: -1, O_EXCL: -1 }, // unused
+			writeSync(fd, buf) {
+				outputBuf += decoder.decode(buf);
+				const nl = outputBuf.lastIndexOf("\n");
+				if (nl != -1) {
+					console.log(outputBuf.substr(0, nl));
+					outputBuf = outputBuf.substr(nl + 1);
+				}
+				return buf.length;
+			},
+			write(fd, buf, offset, length, position, callback) {
+				if (offset !== 0 || length !== buf.length || position !== null) {
+					callback(enosys());
+					return;
+				}
+				const n = this.writeSync(fd, buf);
+				callback(null, n);
+			},
+			chmod(path, mode, callback) { callback(enosys()); },
+			chown(path, uid, gid, callback) { callback(enosys()); },
+			close(fd, callback) { callback(enosys()); },
+			fchmod(fd, mode, callback) { callback(enosys()); },
+			fchown(fd, uid, gid, callback) { callback(enosys()); },
+			fstat(fd, callback) { callback(enosys()); },
+			fsync(fd, callback) { callback(null); },
+			ftruncate(fd, length, callback) { callback(enosys()); },
+			lchown(path, uid, gid, callback) { callback(enosys()); },
+			link(path, link, callback) { callback(enosys()); },
+			lstat(path, callback) { callback(enosys()); },
+			mkdir(path, perm, callback) { callback(enosys()); },
+			open(path, flags, mode, callback) { callback(enosys()); },
+			read(fd, buffer, offset, length, position, callback) { callback(enosys()); },
+			readdir(path, callback) { callback(enosys()); },
+			readlink(path, callback) { callback(enosys()); },
+			rename(from, to, callback) { callback(enosys()); },
+			rmdir(path, callback) { callback(enosys()); },
+			stat(path, callback) { callback(enosys()); },
+			symlink(path, link, callback) { callback(enosys()); },
+			truncate(path, length, callback) { callback(enosys()); },
+			unlink(path, callback) { callback(enosys()); },
+			utimes(path, atime, mtime, callback) { callback(enosys()); },
+		};
+	}
+
+	if (!global.process) {
+		global.process = {
+			getuid() { return -1; },
+			getgid() { return -1; },
+			geteuid() { return -1; },
+			getegid() { return -1; },
+			getgroups() { throw enosys(); },
+			pid: -1,
+			ppid: -1,
+			umask() { throw enosys(); },
+			cwd() { throw enosys(); },
+			chdir() { throw enosys(); },
+		}
+	}
+
+	if (!global.crypto) {
+		const nodeCrypto = require("node:crypto");
+		global.crypto = {
+			getRandomValues(b) {
+				nodeCrypto.randomFillSync(b);
+			},
+		};
+	}
+
+	if (!global.performance) {
+		global.performance = {
+			now() {
+				const [sec, nsec] = process.hrtime();
+				return sec * 1000 + nsec / 1000000;
+			},
+		};
+	}
+
+	if (!global.TextEncoder) {
+		global.TextEncoder = require("node:util").TextEncoder;
+	}
+
+	if (!global.TextDecoder) {
+		global.TextDecoder = require("node:util").TextDecoder;
+	}
+
+	// End of polyfills for common API.
+
+	const encoder = new TextEncoder("utf-8");
+	const decoder = new TextDecoder("utf-8");
+	let reinterpretBuf = new DataView(new ArrayBuffer(8));
+	var logLine = [];
+	const wasmExit = {}; // thrown to exit via proc_exit (not an error)
+
+	global.Go = class {
+		constructor() {
+			this._callbackTimeouts = new Map();
+			this._nextCallbackTimeoutID = 1;
+
+			const mem = () => {
+				// The buffer may change when requesting more memory.
+				return new DataView(this._inst.exports.memory.buffer);
+			}
+
+			const unboxValue = (v_ref) => {
+				reinterpretBuf.setBigInt64(0, v_ref, true);
+				const f = reinterpretBuf.getFloat64(0, true);
+				if (f === 0) {
+					return undefined;
+				}
+				if (!isNaN(f)) {
+					return f;
+				}
+
+				const id = v_ref & 0xffffffffn;
+				return this._values[id];
+			}
+
+
+			const loadValue = (addr) => {
+				let v_ref = mem().getBigUint64(addr, true);
+				return unboxValue(v_ref);
+			}
+
+			const boxValue = (v) => {
+				const nanHead = 0x7FF80000n;
+
+				if (typeof v === "number") {
+					if (isNaN(v)) {
+						return nanHead << 32n;
+					}
+					if (v === 0) {
+						return (nanHead << 32n) | 1n;
+					}
+					reinterpretBuf.setFloat64(0, v, true);
+					return reinterpretBuf.getBigInt64(0, true);
+				}
+
+				switch (v) {
+					case undefined:
+						return 0n;
+					case null:
+						return (nanHead << 32n) | 2n;
+					case true:
+						return (nanHead << 32n) | 3n;
+					case false:
+						return (nanHead << 32n) | 4n;
+				}
+
+				let id = this._ids.get(v);
+				if (id === undefined) {
+					id = this._idPool.pop();
+					if (id === undefined) {
+						id = BigInt(this._values.length);
+					}
+					this._values[id] = v;
+					this._goRefCounts[id] = 0;
+					this._ids.set(v, id);
+				}
+				this._goRefCounts[id]++;
+				let typeFlag = 1n;
+				switch (typeof v) {
+					case "string":
+						typeFlag = 2n;
+						break;
+					case "symbol":
+						typeFlag = 3n;
+						break;
+					case "function":
+						typeFlag = 4n;
+						break;
+				}
+				return id | ((nanHead | typeFlag) << 32n);
+			}
+
+			const storeValue = (addr, v) => {
+				let v_ref = boxValue(v);
+				mem().setBigUint64(addr, v_ref, true);
+			}
+
+			const loadSlice = (array, len, cap) => {
+				return new Uint8Array(this._inst.exports.memory.buffer, array, len);
+			}
+
+			const loadSliceOfValues = (array, len, cap) => {
+				const a = new Array(len);
+				for (let i = 0; i < len; i++) {
+					a[i] = loadValue(array + i * 8);
+				}
+				return a;
+			}
+
+			const loadString = (ptr, len) => {
+				return decoder.decode(new DataView(this._inst.exports.memory.buffer, ptr, len));
+			}
+
+			const timeOrigin = Date.now() - performance.now();
+			this.importObject = {
+				wasi_snapshot_preview1: {
+					// https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#fd_write
+					fd_write: function(fd, iovs_ptr, iovs_len, nwritten_ptr) {
+						let nwritten = 0;
+						if (fd == 1) {
+							for (let iovs_i=0; iovs_i<iovs_len;iovs_i++) {
+								let iov_ptr = iovs_ptr+iovs_i*8; // assuming wasm32
+								let ptr = mem().getUint32(iov_ptr + 0, true);
+								let len = mem().getUint32(iov_ptr + 4, true);
+								nwritten += len;
+								for (let i=0; i<len; i++) {
+									let c = mem().getUint8(ptr+i);
+									if (c == 13) { // CR
+										// ignore
+									} else if (c == 10) { // LF
+										// write line
+										let line = decoder.decode(new Uint8Array(logLine));
+										logLine = [];
+										console.log(line);
+									} else {
+										logLine.push(c);
+									}
+								}
+							}
+						} else {
+							console.error('invalid file descriptor:', fd);
+						}
+						mem().setUint32(nwritten_ptr, nwritten, true);
+						return 0;
+					},
+					fd_close: () => 0,      // dummy
+					fd_fdstat_get: () => 0, // dummy
+					fd_seek: () => 0,       // dummy
+					proc_exit: (code) => {
+						this.exited = true;
+						this.exitCode = code;
+						this._resolveExitPromise();
+						throw wasmExit;
+					},
+					random_get: (bufPtr, bufLen) => {
+						crypto.getRandomValues(loadSlice(bufPtr, bufLen));
+						return 0;
+					},
+				},
+				gojs: {
+					// func ticks() int64
+					"runtime.ticks": () => {
+						return BigInt((timeOrigin + performance.now()) * 1e6);
+					},
+
+					// func sleepTicks(timeout int64)
+					"runtime.sleepTicks": (timeout) => {
+						// Do not sleep, only reactivate scheduler after the given timeout.
+						setTimeout(() => {
+							if (this.exited) return;
+							try {
+								this._inst.exports.go_scheduler();
+							} catch (e) {
+								if (e !== wasmExit) throw e;
+							}
+						}, Number(timeout)/1e6);
+					},
+
+					// func finalizeRef(v ref)
+					"syscall/js.finalizeRef": (v_ref) => {
+						// Note: TinyGo does not support finalizers so this is only called
+						// for one specific case, by js.go:jsString. and can/might leak memory.
+						const id = v_ref & 0xffffffffn;
+						if (this._goRefCounts?.[id] !== undefined) {
+							this._goRefCounts[id]--;
+							if (this._goRefCounts[id] === 0) {
+								const v = this._values[id];
+								this._values[id] = null;
+								this._ids.delete(v);
+								this._idPool.push(id);
+							}
+						} else {
+							console.error("syscall/js.finalizeRef: unknown id", id);
+						}
+					},
+
+					// func stringVal(value string) ref
+					"syscall/js.stringVal": (value_ptr, value_len) => {
+						value_ptr >>>= 0;
+						const s = loadString(value_ptr, value_len);
+						return boxValue(s);
+					},
+
+					// func valueGet(v ref, p string) ref
+					"syscall/js.valueGet": (v_ref, p_ptr, p_len) => {
+						let prop = loadString(p_ptr, p_len);
+						let v = unboxValue(v_ref);
+						let result = Reflect.get(v, prop);
+						return boxValue(result);
+					},
+
+					// func valueSet(v ref, p string, x ref)
+					"syscall/js.valueSet": (v_ref, p_ptr, p_len, x_ref) => {
+						const v = unboxValue(v_ref);
+						const p = loadString(p_ptr, p_len);
+						const x = unboxValue(x_ref);
+						Reflect.set(v, p, x);
+					},
+
+					// func valueDelete(v ref, p string)
+					"syscall/js.valueDelete": (v_ref, p_ptr, p_len) => {
+						const v = unboxValue(v_ref);
+						const p = loadString(p_ptr, p_len);
+						Reflect.deleteProperty(v, p);
+					},
+
+					// func valueIndex(v ref, i int) ref
+					"syscall/js.valueIndex": (v_ref, i) => {
+						return boxValue(Reflect.get(unboxValue(v_ref), i));
+					},
+
+					// valueSetIndex(v ref, i int, x ref)
+					"syscall/js.valueSetIndex": (v_ref, i, x_ref) => {
+						Reflect.set(unboxValue(v_ref), i, unboxValue(x_ref));
+					},
+
+					// func valueCall(v ref, m string, args []ref) (ref, bool)
+					"syscall/js.valueCall": (ret_addr, v_ref, m_ptr, m_len, args_ptr, args_len, args_cap) => {
+						const v = unboxValue(v_ref);
+						const name = loadString(m_ptr, m_len);
+						const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+						try {
+							const m = Reflect.get(v, name);
+							storeValue(ret_addr, Reflect.apply(m, v, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr + 8, 0);
+						}
+					},
+
+					// func valueInvoke(v ref, args []ref) (ref, bool)
+					"syscall/js.valueInvoke": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
+						try {
+							const v = unboxValue(v_ref);
+							const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+							storeValue(ret_addr, Reflect.apply(v, undefined, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr + 8, 0);
+						}
+					},
+
+					// func valueNew(v ref, args []ref) (ref, bool)
+					"syscall/js.valueNew": (ret_addr, v_ref, args_ptr, args_len, args_cap) => {
+						const v = unboxValue(v_ref);
+						const args = loadSliceOfValues(args_ptr, args_len, args_cap);
+						try {
+							storeValue(ret_addr, Reflect.construct(v, args));
+							mem().setUint8(ret_addr + 8, 1);
+						} catch (err) {
+							storeValue(ret_addr, err);
+							mem().setUint8(ret_addr+ 8, 0);
+						}
+					},
+
+					// func valueLength(v ref) int
+					"syscall/js.valueLength": (v_ref) => {
+						return unboxValue(v_ref).length;
+					},
+
+					// valuePrepareString(v ref) (ref, int)
+					"syscall/js.valuePrepareString": (ret_addr, v_ref) => {
+						const s = String(unboxValue(v_ref));
+						const str = encoder.encode(s);
+						storeValue(ret_addr, str);
+						mem().setInt32(ret_addr + 8, str.length, true);
+					},
+
+					// valueLoadString(v ref, b []byte)
+					"syscall/js.valueLoadString": (v_ref, slice_ptr, slice_len, slice_cap) => {
+						const str = unboxValue(v_ref);
+						loadSlice(slice_ptr, slice_len, slice_cap).set(str);
+					},
+
+					// func valueInstanceOf(v ref, t ref) bool
+					"syscall/js.valueInstanceOf": (v_ref, t_ref) => {
+ 						return unboxValue(v_ref) instanceof unboxValue(t_ref);
+					},
+
+					// func copyBytesToGo(dst []byte, src ref) (int, bool)
+					"syscall/js.copyBytesToGo": (ret_addr, dest_addr, dest_len, dest_cap, src_ref) => {
+						let num_bytes_copied_addr = ret_addr;
+						let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
+
+						const dst = loadSlice(dest_addr, dest_len);
+						const src = unboxValue(src_ref);
+						if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
+							mem().setUint8(returned_status_addr, 0); // Return "not ok" status
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
+						mem().setUint8(returned_status_addr, 1); // Return "ok" status
+					},
+
+					// copyBytesToJS(dst ref, src []byte) (int, bool)
+					// Originally copied from upstream Go project, then modified:
+					//   https://github.com/golang/go/blob/3f995c3f3b43033013013e6c7ccc93a9b1411ca9/misc/wasm/wasm_exec.js#L404-L416
+					"syscall/js.copyBytesToJS": (ret_addr, dst_ref, src_addr, src_len, src_cap) => {
+						let num_bytes_copied_addr = ret_addr;
+						let returned_status_addr = ret_addr + 4; // Address of returned boolean status variable
+
+						const dst = unboxValue(dst_ref);
+						const src = loadSlice(src_addr, src_len);
+						if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
+							mem().setUint8(returned_status_addr, 0); // Return "not ok" status
+							return;
+						}
+						const toCopy = src.subarray(0, dst.length);
+						dst.set(toCopy);
+						mem().setUint32(num_bytes_copied_addr, toCopy.length, true);
+						mem().setUint8(returned_status_addr, 1); // Return "ok" status
+					},
+				}
+			};
+
+			// Go 1.20 uses 'env'. Go 1.21 uses 'gojs'.
+			// For compatibility, we use both as long as Go 1.20 is supported.
+			this.importObject.env = this.importObject.gojs;
+		}
+
+		async run(instance) {
+			this._inst = instance;
+			this._values = [ // JS values that Go currently has references to, indexed by reference id
+				NaN,
+				0,
+				null,
+				true,
+				false,
+				global,
+				this,
+			];
+			this._goRefCounts = []; // number of references that Go has to a JS value, indexed by reference id
+			this._ids = new Map();  // mapping from JS values to reference ids
+			this._idPool = [];      // unused ids that have been garbage collected
+			this.exited = false;    // whether the Go program has exited
+			this.exitCode = 0;
+
+			if (this._inst.exports._start) {
+				let exitPromise = new Promise((resolve, reject) => {
+					this._resolveExitPromise = resolve;
+				});
+
+				// Run program, but catch the wasmExit exception that's thrown
+				// to return back here.
+				try {
+					this._inst.exports._start();
+				} catch (e) {
+					if (e !== wasmExit) throw e;
+				}
+
+				await exitPromise;
+				return this.exitCode;
+			} else {
+				this._inst.exports._initialize();
+			}
+		}
+
+		_resume() {
+			if (this.exited) {
+				throw new Error("Go program has already exited");
+			}
+			try {
+				this._inst.exports.resume();
+			} catch (e) {
+				if (e !== wasmExit) throw e;
+			}
+			if (this.exited) {
+				this._resolveExitPromise();
+			}
+		}
+
+		_makeFuncWrapper(id) {
+			const go = this;
+			return function () {
+				const event = { id: id, this: this, args: arguments };
+				go._pendingEvent = event;
+				go._resume();
+				return event.result;
+			};
+		}
+	}
+
+	if (
+		global.require &&
+		global.require.main === module &&
+		global.process &&
+		global.process.versions &&
+		!global.process.versions.electron
+	) {
+		if (process.argv.length != 3) {
+			console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
+			process.exit(1);
+		}
+
+		const go = new Go();
+		WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then(async (result) => {
+			let exitCode = await go.run(result.instance);
+			process.exit(exitCode);
+		}).catch((err) => {
+			console.error(err);
+			process.exit(1);
+		});
+	}
+})();
+
+// wasm setup code
+export default function init (path) {
+	return new Promise ((res) => {
+		const go = new Go();
+		const run = (obj) => {
+			const wasm = obj.instance;
+			global.wfa = wasm
+			go.run(wasm);
+			res()
+		}
+		if ('instantiateStreaming' in WebAssembly) {
+			WebAssembly.instantiateStreaming(fetch(path), go.importObject).then(function (obj) {
+				run(obj)				
+			})
+		} else {
+			fetch(path).then(resp =>
+				resp.arrayBuffer()
+			).then(bytes =>
+				WebAssembly.instantiate(bytes, go.importObject).then(function (obj) {
+					run(obj)	
+				})
+			)
+		}
+	}) 
+}