primea-objects - npm Package Compare versions

Comparing version 0.0.3 to 0.0.4

index.js

@@ -0,1 +1,2 @@
+const crypto = require('crypto')
 const cbor = require('borc')
@@ -190,2 +191,29 @@ const EventEmitter = require('events')
 
+/**
+ * returns the ID of an actor
+ * @param {Object} id
+ * @param {Number} id.nonce - the actor's nonce
+ * @param {ID} id.parent - the actor's parent's ID
+ * @return {ID}
+ */
+function generateActorId (id) {
+  const encoded = _encodeActorId(id)
+  const hashed = _hash(encoded)
+  return new ID(hashed)
+}
+
+function _encodeActorId (id) {
+  if (id.parent) {
+    return cbor.encode([id.nonce, id.parent.id])
+  } else {
+    return cbor.encode([id.nonce, null])
+  }
+}
+
+function _hash (buf) {
+  const hash = crypto.createHash('sha256')
+  hash.update(buf)
+  return hash.digest().slice(0, 20)
+}
+
 module.exports = {
@@ -197,3 +225,4 @@ Message,
   decoder,
-  getType
+  getType,
+  generateActorId
 }

package.json

 {
   "name": "primea-objects",
-  "version": "0.0.3",
+  "version": "0.0.4",
   "description": "Object helper classes for Primea's system Objects",
@@ -25,4 +25,4 @@ "main": "index.js",
     "coveralls": "^3.0.0",
-    "documentation": "^6.1.0",
-    "nyc": "^11.6.0",
+    "documentation": "^6.3.0",
+    "nyc": "^11.7.1",
     "standard": "^11.0.1",
@@ -29,0 +29,0 @@ "tape": "^4.9.0"

tests/index.js

@@ -7,3 +7,2 @@ const Buffer = require('safe-buffer').Buffer
 tape('system objects', t => {
-
   t.equals(objects.getType(), 'invalid')
@@ -53,1 +52,17 @@ t.equals(objects.getType(true), 'invalid')
 })
+
+tape('actor IDs', t => {
+  const id0 = { nonce: 0, parent: null }
+  const hashedId0 = objects.generateActorId(id0)
+  t.deepEquals(hashedId0.id, Buffer.from('372a08b828598122fc64c4aa94735c770f25bbbc', 'hex'))
+
+  const id00 = { nonce: 0, parent: hashedId0 }
+  const hashedId00 = objects.generateActorId(id00)
+  t.deepEquals(hashedId00.id, Buffer.from('10d7d4be8663c37d8ea7cff89b7c01c059ebbc80', 'hex'))
+
+  const id01 = { nonce: 1, parent: hashedId0 }
+  const hashedId01 = objects.generateActorId(id01)
+  t.deepEquals(hashedId01.id, Buffer.from('0ca311b75efd27e7daf6eec8b51b5c1fe33ff233', 'hex'))
+
+  t.end()
+})

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Improved metrics

Total package byte prevSize

119845

increased by1.05%

Lines of code

676

increased by5.96%

No dependency changes