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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| //go:build js && wasm | ||
|
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| package jsbridge | ||
|
|
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| import ( | ||
| "bytes" | ||
| _ "embed" | ||
| "fmt" | ||
| "net/url" | ||
| "os" | ||
| "strings" | ||
| "syscall/js" | ||
| "text/template" | ||
| ) | ||
|
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| //go:embed zcnworker.js.tpl | ||
| var WorkerJSTpl []byte | ||
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| func buildWorkerJS(args, env []string, path string) (string, error) { | ||
| return buildJS(args, env, path, WorkerJSTpl) | ||
| } | ||
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| func buildJS(args, env []string, path string, tpl []byte) (string, error) { | ||
| var workerJS bytes.Buffer | ||
|
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| if len(args) == 0 { | ||
| args = []string{path} | ||
| } | ||
|
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| if len(env) == 0 { | ||
| env = os.Environ() | ||
| } | ||
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| if uRL, err := url.ParseRequestURI(path); err != nil || !uRL.IsAbs() { | ||
| origin := js.Global().Get("location").Get("origin").String() | ||
| baseURL, err := url.ParseRequestURI(origin) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| path = baseURL.JoinPath(path).String() | ||
| } | ||
|
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| data := templateData{ | ||
| Path: path, | ||
| Args: args, | ||
| Env: env, | ||
| } | ||
| if err := template.Must(template.New("js").Parse(string(tpl))).Execute(&workerJS, data); err != nil { | ||
| return "", err | ||
| } | ||
| return workerJS.String(), nil | ||
| } | ||
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| type templateData struct { | ||
| Path string | ||
| Args []string | ||
| Env []string | ||
| } | ||
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| func (d templateData) ArgsToJS() string { | ||
| el := []string{} | ||
| for _, e := range d.Args { | ||
| el = append(el, `"`+e+`"`) | ||
| } | ||
| return "[" + strings.Join(el, ",") + "]" | ||
| } | ||
|
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| func (d templateData) EnvToJS() string { | ||
| el := []string{} | ||
| for _, entry := range d.Env { | ||
| if k, v, ok := strings.Cut(entry, "="); ok { | ||
| el = append(el, fmt.Sprintf(`"%s":"%s"`, k, v)) | ||
| } | ||
| } | ||
| return "{" + strings.Join(el, ",") + "}" | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| //go:build js && wasm | ||
| // +build js,wasm | ||
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| package jsbridge | ||
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| import ( | ||
| "context" | ||
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| "github.com/google/uuid" | ||
| "github.com/hack-pad/go-webworkers/worker" | ||
| "github.com/hack-pad/safejs" | ||
| ) | ||
|
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| type WasmWebWorker struct { | ||
| // Name specifies an identifying name for the DedicatedWorkerGlobalScope representing the scope of the worker, which is mainly useful for debugging purposes. | ||
| // If this is not specified, `Start` will create a UUIDv4 for it and populate back. | ||
| Name string | ||
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| // Path is the path of the WASM to run as the Web Worker. | ||
| // This can be a relative path on the server, or an abosolute URL. | ||
| Path string | ||
|
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| // Args holds command line arguments, including the WASM as Args[0]. | ||
| // If the Args field is empty or nil, Run uses {Path}. | ||
| Args []string | ||
|
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| // Env specifies the environment of the process. | ||
| // Each entry is of the form "key=value". | ||
| // If Env is nil, the new Web Worker uses the current context's | ||
| // environment. | ||
| // If Env contains duplicate environment keys, only the last | ||
| // value in the slice for each duplicate key is used. | ||
| Env []string | ||
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| worker *worker.Worker | ||
| } | ||
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| func NewWasmWebWorker(blobberURL, clientID, privateKey string) (*WasmWebWorker, error) { | ||
| w := &WasmWebWorker{ | ||
| Name: blobberURL, | ||
| Env: []string{"BLOBBER_URL=" + blobberURL, "CLIENT_ID=" + clientID, "PRIVATE_KEY=" + privateKey, "MODE=worker"}, | ||
| } | ||
|
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| if err := w.Start(); err != nil { | ||
| return nil, err | ||
| } | ||
| return w, nil | ||
| } | ||
|
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| func (ww *WasmWebWorker) Start() error { | ||
| workerJS, err := buildWorkerJS(ww.Args, ww.Env, ww.Path) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| if ww.Name == "" { | ||
| ww.Name = uuid.New().String() | ||
| } | ||
|
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| wk, err := worker.NewFromScript(workerJS, worker.Options{Name: ww.Name}) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| ww.worker = wk | ||
|
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| return nil | ||
| } | ||
|
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| // PostMessage sends data in a message to the worker, optionally transferring ownership of all items in transfers. | ||
| func (ww *WasmWebWorker) PostMessage(data safejs.Value, transfers []safejs.Value) error { | ||
| return ww.worker.PostMessage(data, transfers) | ||
| } | ||
|
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| // Terminate immediately terminates the Worker. | ||
| func (ww *WasmWebWorker) Terminate() { | ||
| ww.worker.Terminate() | ||
| } | ||
|
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| // Listen sends message events on a channel for events fired by self.postMessage() calls inside the Worker's global scope. | ||
| // Stops the listener and closes the channel when ctx is canceled. | ||
| func (ww *WasmWebWorker) Listen(ctx context.Context) (<-chan worker.MessageEvent, error) { | ||
| return ww.worker.Listen(ctx) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| importScripts('https://cdn.jsdelivr.net/gh/golang/[email protected]/misc/wasm/wasm_exec.js'); | ||
| importScripts('https://herumi.github.io/bls-wasm/browser/bls.js') | ||
|
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| const go = new Go(); | ||
| go.argv = {{.ArgsToJS}} | ||
| go.env = {{.EnvToJS}} | ||
| const bls = self.bls | ||
| bls.init(bls.BN254).then(()=>{}) | ||
| WebAssembly.instantiateStreaming(fetch("http://localhost:8080/wasmsdk/demo/zcn.wasm"), go.importObject).then((result) => { | ||
| go.run(result.instance); | ||
| }); | ||
|
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| function hexStringToByte(str) { | ||
| if (!str) return new Uint8Array() | ||
| const a = [] | ||
| for (let i = 0, len = str.length; i < len; i += 2) { | ||
| a.push(parseInt(str.substr(i, 2), 16)) | ||
| } | ||
|
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| return new Uint8Array(a) | ||
| } | ||
|
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| self.__zcn_worker_wasm__ = { | ||
| sign: async (hash, secretKey) => { | ||
| if (!secretKey){ | ||
| const errMsg = 'err: wasm blsSign function requires a secret key' | ||
| console.warn(errMsg) | ||
| throw new Error(errMsg) | ||
| } | ||
| const bytes = hexStringToByte(hash) | ||
| const sk = bls.deserializeHexStrToSecretKey(secretKey) | ||
| const sig = sk.sign(bytes) | ||
|
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| if (!sig) { | ||
| const errMsg = 'err: wasm blsSign function failed to sign transaction' | ||
| console.warn(errMsg) | ||
| throw new Error(errMsg) | ||
| } | ||
|
|
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| return sig.serializeToHexStr() | ||
| } | ||
| } |
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