Extend examples

examples/node/2-store-read-file/index.ts

@@ -23,12 +23,12 @@ const dir = path.dirname(fileURLToPath(import.meta.url));
 /**
  * The file to be stored
  */
-const inputFilePath = path.resolve(dir, '2mb.jpg');
+const inputFilePath = path.resolve(dir, '../assets/nature.jpg');
 
 /**
  * The path to store the downloaded file
  */
-const outputFilePath = path.resolve(dir, '2mb-downloaded.jpg');
+const outputFilePath = path.resolve(dir, '../assets/nature-downloaded.jpg');
 
 /**
  * Create a DDC client instance and connect it to DDC TESTNET

examples/node/5-use-exported-account/6S5nrcLgUrhC2tLpaG83VLrMndnQ66DPTz7j6PoRnQjZKpvx.json

@@ -0,0 +1,6 @@
+{
+  "encoded": "kBkc/6ghJVs4thxE7ZMSRhxyVtYi2EzjJz8gvI2HfKQAgAAAAQAAAAgAAAAs5o9q7l+BpKkYsTXvuroLsxdysjikaK8qRkm13kzbnCfG5t9Df2QnQfHxrYyboPp5SoGdKxhnz5HRLK4/Fq1wPZpk43XSaa/b4PxOphxLfFYdjG2MJt80QSIzzRrP6TNj6R/YfMsKSySGqYHgiOkVnJJyZq0Exc35+3W6CyESzciXzDIw2iYzNdV5CJWpiAtgnW7tHxmsldKhUmYf",
+  "encoding": { "content": ["pkcs8", "ed25519"], "type": ["scrypt", "xsalsa20-poly1305"], "version": "3" },
+  "address": "5EdskhqqsNCUABVFhsZkxXfG2p4sRtf9ChU9iC5pE9bhx1kP",
+  "meta": {}
+}

examples/node/5-use-exported-account/index.ts

@@ -0,0 +1,31 @@
+import { DdcClient, File, TESTNET, JsonSigner } from '@cere-ddc-sdk/ddc-client';
+import * as fs from 'fs';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+// The wallet should have enough CERE to pay for the transaction fees
+const pathToAccount = './6S5nrcLgUrhC2tLpaG83VLrMndnQ66DPTz7j6PoRnQjZKpvx.json';
+const accountPassphrase = '1234';
+
+// The DDC bucket where the file will be stored
+const bucketId = BigInt(448920);
+
+// Detect the current directory
+const dir = path.dirname(fileURLToPath(import.meta.url));
+
+// Create DDC client instance using JSON account exported from Cere Wallet
+const keyringPair = JSON.parse(fs.readFileSync(path.resolve(dir, pathToAccount)).toString());
+const jsonSigner = new JsonSigner(keyringPair, { passphrase: accountPassphrase });
+const client = await DdcClient.create(jsonSigner, TESTNET);
+
+// Upload file
+const pathToFileToUpload = path.resolve(dir, '../assets/nature.jpg');
+const fileToUpload = new File(fs.createReadStream(pathToFileToUpload), { size: fs.statSync(pathToFileToUpload).size });
+const uploadedFileUri = await client.store(bucketId, fileToUpload);
+console.log(
+  'The file can be accessed by this URL',
+  `https://cdn.testnet.cere.network/${bucketId}/${uploadedFileUri.cid}`,
+);
+console.log('File stored into bucket', bucketId, 'with CID', uploadedFileUri.cid);
+
+await client.disconnect();

examples/node/6-developer-console-compatibility/6S5nrcLgUrhC2tLpaG83VLrMndnQ66DPTz7j6PoRnQjZKpvx.json

@@ -0,0 +1,6 @@
+{
+  "encoded": "kBkc/6ghJVs4thxE7ZMSRhxyVtYi2EzjJz8gvI2HfKQAgAAAAQAAAAgAAAAs5o9q7l+BpKkYsTXvuroLsxdysjikaK8qRkm13kzbnCfG5t9Df2QnQfHxrYyboPp5SoGdKxhnz5HRLK4/Fq1wPZpk43XSaa/b4PxOphxLfFYdjG2MJt80QSIzzRrP6TNj6R/YfMsKSySGqYHgiOkVnJJyZq0Exc35+3W6CyESzciXzDIw2iYzNdV5CJWpiAtgnW7tHxmsldKhUmYf",
+  "encoding": { "content": ["pkcs8", "ed25519"], "type": ["scrypt", "xsalsa20-poly1305"], "version": "3" },
+  "address": "5EdskhqqsNCUABVFhsZkxXfG2p4sRtf9ChU9iC5pE9bhx1kP",
+  "meta": {}
+}

examples/node/6-developer-console-compatibility/README.md

@@ -0,0 +1,8 @@
+# Developer console compatibility
+
+You can use this guide if you want your files uploaded via SDK to be visible in Developer Console.
+
+By default, files uploaded to DDC aren't indexed.
+Once you uploaded file to DDC you receive it's CID a unique hash-based identifier so later you can access your file using bucket id and CID.
+
+In order to have a folder structure (hierarchy) Developer Console uses DAG API. That API allows us to structure set of files if a folder hierarchy where each folder is a separate DAG node. So when client uploads a file or creates a folder the all DAG node above it are updated as well.

examples/node/6-developer-console-compatibility/index.ts

@@ -0,0 +1,54 @@
+import { DdcClient, File, Link, DagNodeUri, DagNode, JsonSigner, TESTNET } from '@cere-ddc-sdk/ddc-client';
+import * as fs from 'fs';
+import { fileURLToPath } from 'url';
+import path from 'path';
+
+// The wallet should have enough CERE to pay for the transaction fees
+const pathToAccount = './6S5nrcLgUrhC2tLpaG83VLrMndnQ66DPTz7j6PoRnQjZKpvx.json';
+const accountPassphrase = '1234';
+
+// The DDC bucket where the file will be stored
+const bucketId = BigInt(448924);
+
+// Detect the current directory
+const dir = path.dirname(fileURLToPath(import.meta.url));
+
+const pathToFileToUpload = path.resolve(dir, '../assets/nature.jpg');
+const fileName = pathToFileToUpload.substring(pathToFileToUpload.lastIndexOf('/') + 1);
+
+// Initialise client using JSON account exported from Cere Wallet
+const keyringPair = JSON.parse(fs.readFileSync(path.resolve(dir, pathToAccount)).toString());
+const jsonSigner = new JsonSigner(keyringPair, { passphrase: accountPassphrase });
+const client = await DdcClient.create(jsonSigner, { ...TESTNET, logLevel: 'fatal' });
+
+// Upload file
+const fileSize = fs.statSync(pathToFileToUpload).size;
+const fileToUpload = new File(fs.createReadStream(pathToFileToUpload), {
+  size: fileSize,
+});
+const uploadedFileUri = await client.store(bucketId, fileToUpload);
+console.log('File stored into bucket', bucketId, 'with CID', uploadedFileUri.cid);
+console.log(
+  'The file can be accessed by this URL',
+  `https://cdn.testnet.cere.network/${bucketId}/${uploadedFileUri.cid}`,
+);
+
+// Attach uploaded file to 'fs' DAG node (where 'fs' is a CNS name used by Developer Console to index files)
+const filePathInDeveloperConsole = 'photos/nature/';
+const rootDagNode = await client.read(new DagNodeUri(bucketId, 'fs'), { cacheControl: 'no-cache' }).catch((res) => {
+  if (res.message == 'Cannot resolve CNS name: "fs"') {
+    return new DagNode(null);
+  } else {
+    throw new Error("Failed to fetch 'fs' DAG node");
+  }
+});
+rootDagNode.links.push(new Link(uploadedFileUri.cid, fileSize, filePathInDeveloperConsole + fileName));
+await client.store(bucketId, rootDagNode, { name: 'fs' });
+console.log(
+  'The file can be found in developer console in bucket',
+  bucketId,
+  'and path is',
+  filePathInDeveloperConsole,
+);
+
+await client.disconnect();

examples/node/README.md

@@ -6,6 +6,8 @@ This examples directory contains several common DDC SDK use-cases for NodeJs app
 - [How to store and read a file](./2-store-read-file/index.ts)
 - [How to upload a website](./3-upload-website/index.ts)
 - [How to stream events](./4-store-read-events/index.ts)
+- [How to use exported account (Cere Wallet)](./5-use-exported-account/index.ts)
+- [How to index files so that they are visible in Developer Console](./6-developer-console-compatibility/index.ts)
 
 ## Quick start
 
@@ -32,13 +34,13 @@ Run the following commands from the project root
 4. Go to `examples` directory
 
    ```bash
-   cd ./examples
+   cd ./examples/node
    ```
 
 5. Run an example
 
    ```bash
-   npm run example:1 # can be 1-4
+   npm run example:1 # can be 1-6
    ```
 
 

examples/node/package.json

@@ -7,7 +7,9 @@
     "example:1": "ts-node --esm ./1-create-bucket/index.ts",
     "example:2": "ts-node --esm ./2-store-read-file/index.ts",
     "example:3": "ts-node --esm ./3-upload-website/index.ts",
-    "example:4": "ts-node --esm ./4-store-read-events/index.ts"
+    "example:4": "ts-node --esm ./4-store-read-events/index.ts",
+    "example:5": "ts-node --esm ./5-use-exported-account/index.ts",
+    "example:6": "ts-node --esm ./6-developer-console-compatibility/index.ts"
   },
   "dependencies": {
     "@cere-ddc-sdk/ddc-client": "2.13.0",