Integrate async AquaVM into fluence-js (#88)

src/internal/Particle.ts

@@ -0,0 +1,147 @@
+/*
+ * Copyright 2020 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { v4 as uuidv4 } from 'uuid';
+import { fromByteArray, toByteArray } from 'base64-js';
+import { CallResultsArray, LogLevel } from '@fluencelabs/avm';
+import log from 'loglevel';
+import { ParticleContext } from './commonTypes';
+import { dataToString } from './utils';
+
+const DefaultTTL = 7000;
+
+export class Particle {
+    id: string;
+    initPeerId: string;
+    timestamp: number;
+    ttl: number;
+    script: string;
+    signature: string;
+    data: Uint8Array;
+    callResults: CallResultsArray = [];
+
+    static createNew(script: string, ttlMs?: number): Particle {
+        const res = new Particle();
+        res.id = genUUID();
+        res.script = script;
+        res.ttl = ttlMs || DefaultTTL;
+        res.data = Buffer.from([]);
+        res.timestamp = Date.now();
+
+        return res;
+    }
+
+    static fromString(str: string): Particle {
+        const json = JSON.parse(str);
+        const res = new Particle();
+        res.id = json.id;
+        res.initPeerId = json.init_peer_id;
+        res.timestamp = json.timestamp;
+        res.ttl = json.ttl;
+        res.script = json.script;
+        res.signature = json.signature;
+        res.data = toByteArray(json.data);
+
+        return res;
+    }
+
+    getParticleContext(): ParticleContext {
+        return {
+            particleId: this.id,
+            initPeerId: this.initPeerId,
+            timestamp: this.timestamp,
+            ttl: this.ttl,
+            signature: this.signature,
+        };
+    }
+
+    actualTtl(): number {
+        return this.timestamp + this.ttl - Date.now();
+    }
+
+    hasExpired(): boolean {
+        return this.actualTtl() <= 0;
+    }
+
+    clone(): Particle {
+        const res = new Particle();
+        res.id = this.id;
+        res.initPeerId = this.initPeerId;
+        res.timestamp = this.timestamp;
+        res.ttl = this.ttl;
+        res.script = this.script;
+        res.signature = this.signature;
+        res.data = this.data;
+        res.callResults = this.callResults;
+        return res;
+    }
+
+    toString(): string {
+        const particle = this;
+        const payload = {
+            action: 'Particle',
+            id: particle.id,
+            init_peer_id: particle.initPeerId,
+            timestamp: particle.timestamp,
+            ttl: particle.ttl,
+            script: particle.script,
+            // TODO: copy signature from a particle after signatures will be implemented on nodes
+            signature: [],
+            data: fromByteArray(particle.data),
+        };
+
+        return JSON.stringify(payload);
+    }
+
+    logTo(level: LogLevel, message: string) {
+        let fn;
+        let data;
+        switch (level) {
+            case 'debug':
+                fn = log.debug;
+                data = dataToString(this.data);
+                break;
+            case 'error':
+                fn = log.error;
+                break;
+            case 'info':
+                fn = log.info;
+                break;
+            case 'trace':
+                fn = log.trace;
+                break;
+            case 'warn':
+                fn = log.warn;
+                break;
+            default:
+                return;
+        }
+
+        fn(message, {
+            id: this.id,
+            init_peer_id: this.initPeerId,
+            timestamp: this.timestamp,
+            ttl: this.ttl,
+            script: this.script,
+            signature: this.signature,
+            data: data,
+        });
+    }
+}
+
+function genUUID() {
+    return uuidv4();
+}