example seed-func ready

examples/basic-usage-boilerplate/README.md

@@ -1,2 +1,10 @@
 # Usage
-`npm install`
+`npm install` -> Installs all required dependencies to run these examples.
+
+## Different Examples
+**Basic Usage**: Create asset and transfer it to new owner. 
+-> `npm start`
+
+**Querying for Assets**: Query for assetdata or metadata.
+-> `npm run query-assets`
+

examples/basic-usage-boilerplate/package.json

@@ -7,7 +7,9 @@
     "serve": "node dist/basic-usage.js",
     "clean": "rimraf ./dist",
     "start": "nodemon src/basic-usage.js --exec babel-node",
-    "query-assets": "nodemon src/query-assets.js --exec babel-node"
+    "query-assets": "nodemon src/query-assets.js --exec babel-node",
+    "seed-func": "nodemon src/seed-func.js --exec babel-node",
+    "websocket": "nodemon src/websocket.js --exec babel-node"
   },
   "author": "BigchainDB",
   "license": "MIT",
@@ -27,6 +29,7 @@
   "repository": "/",
   "private": true,
   "dependencies": {
-    "bigchaindb-driver": "^3.2.0"
+    "bigchaindb-driver": "^3.2.0",
+    "bip39": "^2.5.0"
   }
 }

examples/basic-usage-boilerplate/src/seed-func.js

@@ -0,0 +1,34 @@
+import bip39 from 'bip39'
+
+const driver = require('bigchaindb-driver')
+
+// ======== Create Keypair ======== //
+/**
+ * Use a passphrase to derive a keypair
+ * If you use the same seed -> you will derive the same keypair
+ *
+ * mnemnoicToSeed() transforms the passphrase you gave as an input
+ * to a byteArray
+ *
+ * BigchainDB however only accepts an input length of 32 characters
+ * so we have to slice this to give it as input for driver.Ed25519Keypair()
+ *
+ * Is it safe to slice? Yes, a seed of length 32 is very safe according
+ * to related papers discussing this.
+ */
+const passphrase = 'This is a random passphrase'
+const seed = bip39.mnemonicToSeed(passphrase).slice(0, 32)
+
+const keypair = new driver.Ed25519Keypair(seed)
+
+console.log(`Public Key: ${keypair.publicKey} - Private Key: ${keypair.privateKey}`) // eslint-disable-line no-console
+
+// ======== Other Bip39 Functionality not related to BigchainDB ======== //
+
+/* Create Random passphrase */
+const mnemonic = bip39.generateMnemonic()
+console.log('Random passphrase: ', mnemonic) // eslint-disable-line no-console
+
+/* Validate mnemnoic */
+console.log(bip39.validateMnemonic(mnemonic)) // eslint-disable-line no-console
+console.log(bip39.validateMnemonic('some random strings together but to short')) // eslint-disable-line no-console