GitBook: [#9] No subject

building-with-ocean/using-ocean-libraries/update-metadata.md

@@ -8,7 +8,76 @@ See [this](configuration.md) guide on defining a `.env` file and a configuration
 
 {% tabs %}
 {% tab title="ocean.js" %}
+{% code title="updateMetadata.js" %}
+```javascript
+const {
+  Nft,
+  ProviderInstance,
+  getHash,
+  Aquarius
+} = require('@oceanprotocol/lib');
+const { SHA256 } = require('crypto-js');
+const Web3 = require('web3');
+const { web3Provider, oceanConfig } = require('./config');
 
+const web3 = new Web3(web3Provider);
+const aquarius = new Aquarius(oceanConfig.metadataCacheUri);
+const nft = new Nft(web3);
+const providerUrl = oceanConfig.providerUri;
+
+// replace the did here
+const did = "did:op:a419f07306d71f3357f8df74807d5d12bddd6bcd738eb0b461470c64859d6f0f";
+
+const setMetadata = async (did) => {
+  const accounts = await web3.eth.getAccounts();
+  const publisherAccount = accounts[0];
+
+  const ddo = await aquarius.resolve(did);
+
+  // update the ddo here
+  ddo.metadata.name = "Sample dataset v2";
+  ddo.metadata.description = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam";
+  ddo.metadata.tags = ["new tag1", "new tag2"];
+
+  providerResponse = await ProviderInstance.encrypt(ddo, providerUrl);
+  const encryptedResponse = await providerResponse;
+  const metadataHash = getHash(JSON.stringify(ddo));
+
+  await nft.setMetadata(
+    ddo.nftAddress,
+    publisherAccount,
+    0,
+    providerUrl,
+    '',
+    '0x2',
+    encryptedResponse,
+    `0x${metadataHash}`
+  );
+
+  await aquarius.waitForAqua(ddo.id);
+
+  console.log(`Resolved asset did [${ddo.id}]from aquarius.`);
+  console.log(`Updated name: [${ddo.metadata.name}].`);
+  console.log(`Updated description: [${ddo.metadata.description}].`);
+  console.log(`Updated tags: [${ddo.metadata.tags}].`);
+
+};
+
+setMetadata(did).then(() => {
+  process.exit();
+}).catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
+
+```
+{% endcode %}
+
+Execute the script
+
+```bash
+node updateMetadata.js
+```
 {% endtab %}
 
 {% tab title="ocean.py" %}