Add missing file q-chat

plugins/plugins/core/q-chat/computePowWorker.js

@@ -0,0 +1,53 @@
+import { Sha256 } from 'asmcrypto.js'
+
+function sbrk(size, heap) {
+	let brk = 512 * 1024 // stack top
+	let old = brk
+	brk += size
+	if (brk > heap.length) throw new Error('heap exhausted')
+	return old
+}
+
+self.addEventListener('message', async e => {
+	const response = await computePow(e.data.chatBytes, e.data.path, e.data.difficulty)
+	postMessage(response)
+})
+
+const memory = new WebAssembly.Memory({ initial: 256, maximum: 256 })
+const heap = new Uint8Array(memory.buffer)
+
+const computePow = async (chatBytes, path, difficulty) => {
+	let response = null
+	await new Promise((resolve, reject) => {
+		const _chatBytesArray = Object.keys(chatBytes).map(function (key) {
+			return chatBytes[key]
+		})
+		const chatBytesArray = new Uint8Array(_chatBytesArray)
+		const chatBytesHash = new Sha256().process(chatBytesArray).finish().result
+		const hashPtr = sbrk(32, heap)
+		const hashAry = new Uint8Array(memory.buffer, hashPtr, 32)
+		hashAry.set(chatBytesHash)
+		const workBufferLength = 8 * 1024 * 1024
+		const workBufferPtr = sbrk(workBufferLength, heap)
+		const importObject = {
+			env: {
+				memory: memory
+			}
+		}
+		function loadWebAssembly(filename, imports) {
+			// Fetch the file and compile it
+			return fetch(filename).then(response => response.arrayBuffer()).then(buffer => WebAssembly.compile(buffer)).then(module => {
+				// Create the instance.
+				return new WebAssembly.Instance(module, importObject)
+			})
+		}
+		loadWebAssembly(path)
+			.then(wasmModule => {
+				response = {
+					nonce: wasmModule.exports.compute2(hashPtr, workBufferPtr, workBufferLength, difficulty), chatBytesArray
+				}
+				resolve()
+			})
+	})
+	return response
+}