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feat: add service worker and logic to download & validate MASP params
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| /** | ||
| * Define constants for MASP Params Storage | ||
| */ | ||
| const STORAGE_PREFIX = "/namadillo"; | ||
|
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| enum MaspParam { | ||
| Output = "masp-output.params", | ||
| Convert = "masp-convert.params", | ||
| Spend = "masp-spend.params", | ||
| } | ||
|
|
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| const MASP_PARAM_LEN: Record<MaspParam, number> = { | ||
| [MaspParam.Output]: 16398620, | ||
| [MaspParam.Spend]: 49848572, | ||
| [MaspParam.Convert]: 22570940, | ||
| }; | ||
|
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| enum MsgType { | ||
| FetchParam = "fetch-params", | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| /** | ||
| * Establish types for IndexedDB | ||
| */ | ||
| interface KVStore<T> { | ||
| get<U extends T>(key: string): Promise<U | undefined>; | ||
| set<U extends T>(key: string, data: U | null): Promise<void>; | ||
| prefix(): string; | ||
| } | ||
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| let durability: IDBTransactionMode = "readwrite"; | ||
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| class IndexedDBKVStore<T> implements KVStore<T> { | ||
| protected cachedDB?: IDBDatabase; | ||
|
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| constructor(protected readonly _prefix: string) { } | ||
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| public async get<U extends T>(key: string): Promise<U | undefined> { | ||
| const tx = (await this.getDB()).transaction([this.prefix()], "readonly"); | ||
| const store = tx.objectStore(this.prefix()); | ||
|
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| return new Promise((resolve, reject) => { | ||
| const request = store.get(key); | ||
| request.onerror = (event) => { | ||
| event.stopPropagation(); | ||
|
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| reject(event.target); | ||
| }; | ||
| request.onsuccess = () => { | ||
| if (!request.result) { | ||
| resolve(undefined); | ||
| } else { | ||
| resolve(request.result.data); | ||
| } | ||
| }; | ||
| }); | ||
| } | ||
|
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| public async set<U extends T>(key: string, data: U | null): Promise<void> { | ||
| if (data === null) { | ||
| const tx = (await this.getDB()).transaction([this.prefix()], durability, { | ||
| durability: "strict", | ||
| }); | ||
| const store = tx.objectStore(this.prefix()); | ||
|
|
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| return new Promise((resolve, reject) => { | ||
| const request = store.delete(key); | ||
| request.onerror = (event) => { | ||
| event.stopPropagation(); | ||
|
|
||
| reject(event.target); | ||
| }; | ||
| request.onsuccess = () => { | ||
| resolve(); | ||
| }; | ||
| }); | ||
| } else { | ||
| const tx = (await this.getDB()).transaction([this.prefix()], durability, { | ||
| durability: "strict", | ||
| }); | ||
| const store = tx.objectStore(this.prefix()); | ||
|
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| return new Promise((resolve, reject) => { | ||
| const request = store.put({ | ||
| key, | ||
| data, | ||
| }); | ||
| request.onerror = (event) => { | ||
| event.stopPropagation(); | ||
|
|
||
| reject(event.target); | ||
| }; | ||
| request.onsuccess = () => { | ||
| resolve(); | ||
| }; | ||
| }); | ||
| } | ||
| } | ||
|
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| public prefix(): string { | ||
| return this._prefix; | ||
| } | ||
|
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| protected async getDB(): Promise<IDBDatabase> { | ||
| if (this.cachedDB) { | ||
| return this.cachedDB; | ||
| } | ||
|
|
||
| return new Promise((resolve, reject) => { | ||
| const request = indexedDB.open(this.prefix()); | ||
| request.onerror = (event) => { | ||
| event.stopPropagation(); | ||
| reject(event.target); | ||
| }; | ||
|
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| request.onupgradeneeded = (event) => { | ||
| // eslint-disable-next-line @typescript-eslint/ban-ts-comment | ||
| // @ts-ignore | ||
| const db = event.target.result; | ||
|
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| db.createObjectStore(this.prefix(), { keyPath: "key" }); | ||
| }; | ||
|
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| request.onsuccess = () => { | ||
| this.cachedDB = request.result; | ||
| resolve(request.result); | ||
| }; | ||
| }); | ||
| } | ||
|
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| public static async durabilityCheck(): Promise<boolean> { | ||
| const { TARGET } = process.env; | ||
| let isDurable: boolean; | ||
|
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| if (TARGET === "chrome") { | ||
| durability = "readwrite"; | ||
| isDurable = true; | ||
| } else { | ||
| const prefix = "durability-check"; | ||
| const db: IDBDatabase = await new Promise((resolve, reject) => { | ||
| const request = indexedDB.open(prefix); | ||
| request.onerror = (event) => { | ||
| event.stopPropagation(); | ||
| reject(event.target); | ||
| }; | ||
|
|
||
| request.onupgradeneeded = (event) => { | ||
| // eslint-disable-next-line @typescript-eslint/ban-ts-comment | ||
| // @ts-ignore | ||
| const db = event.target.result; | ||
|
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| db.createObjectStore(prefix, { keyPath: "key" }); | ||
| }; | ||
|
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| request.onsuccess = () => { | ||
| resolve(request.result); | ||
| }; | ||
| }); | ||
|
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| try { | ||
| db.transaction([prefix], "readwriteflush" as IDBTransactionMode, { | ||
| durability: "strict", | ||
| }); | ||
| durability = "readwriteflush" as IDBTransactionMode; | ||
| isDurable = true; | ||
| } catch { | ||
| durability = "readwrite"; | ||
| isDurable = false; | ||
| } | ||
| } | ||
|
|
||
| return isDurable; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| importScripts("indexedDb.js"); | ||
| importScripts("constants.js"); | ||
| // const { NAMADA_INTERFACE_PROXY: isProxy = false } = process.env; | ||
|
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| const isProxy = true; | ||
| const TRUSTED_SETUP_URL = | ||
| isProxy ? | ||
| "http://localhost:8010/proxy" | ||
| : "https://github.com/anoma/masp-mpc/releases/download/namada-trusted-setup"; | ||
|
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| const store = new IndexedDBKVStore(STORAGE_PREFIX); | ||
|
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| const fetchAndStoreMaspParam = async (maspParam: MaspParam): Promise<void> => { | ||
| console.info(`Fetching ${maspParam}...`); | ||
| return fetch([TRUSTED_SETUP_URL, maspParam].join("/")) | ||
| .then(async (response) => { | ||
| if (response.ok) { | ||
| const reader = response.body?.getReader(); | ||
| if (!reader) { | ||
| throw new Error("No readable stream returned!"); | ||
| } | ||
| return new ReadableStream({ | ||
| start(controller) { | ||
| return pump(); | ||
| function pump() { | ||
| return reader?.read().then(({ done, value }) => { | ||
| // When no more data needs to be consumed, close the stream | ||
| if (done) { | ||
| controller.close(); | ||
| return; | ||
| } | ||
| // Enqueue the next data chunk into our target stream | ||
| controller.enqueue(value); | ||
| return pump(); | ||
| }); | ||
| } | ||
| }, | ||
| }); | ||
| } | ||
| }) | ||
| .then((stream) => new Response(stream)) | ||
| .then((response) => response.blob()) | ||
| .then(async (blob) => { | ||
| const arrayBuffer = await blob.arrayBuffer(); | ||
| const data = new Uint8Array(arrayBuffer); | ||
|
|
||
| // Validate data length: | ||
| if (data.length === MASP_PARAM_LEN[maspParam]) { | ||
| console.info(`Storing ${maspParam} => `, data); | ||
| return store.set(maspParam, data); | ||
| } | ||
| return Promise.reject( | ||
| `Failed to download ${maspParam}: ${data.length} does not match ${MASP_PARAM_LEN[maspParam]}` | ||
| ); | ||
| }); | ||
| }; | ||
|
|
||
| (async () => { | ||
| const maspOutputParam = await store.get(MaspParam.Output); | ||
| console.log("Found output?: ", maspOutputParam); | ||
|
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| const maspSpendParam = await store.get(MaspParam.Spend); | ||
| console.log("Found spend?: ", maspSpendParam); | ||
|
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| const maspConvertParam = await store.get(MaspParam.Convert); | ||
| console.log("Found convert?", maspConvertParam); | ||
|
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| if (!maspOutputParam) await fetchAndStoreMaspParam(MaspParam.Output); | ||
| if (!maspSpendParam) await fetchAndStoreMaspParam(MaspParam.Spend); | ||
| if (!maspConvertParam) await fetchAndStoreMaspParam(MaspParam.Convert); | ||
| })(); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| { | ||
| "extends": "./tsconfig.json", | ||
| "compilerOptions": { | ||
| "baseUrl": "./sw", | ||
| "lib": ["ESNext", "WebWorker"], | ||
| "noEmit": false, | ||
| "strict": false, | ||
| "outDir": "public", | ||
| "target": "ESNext", | ||
| "isolatedModules": false | ||
| }, | ||
| "include": ["sw"] | ||
| } |