add permissioned domain modular tutorial

_code-samples/modular-tutorials/credential-manager.js

@@ -0,0 +1,66 @@
+// *******************************************************
+// *********** Create Credential *************************
+// *******************************************************
+
+async function createCredential() {
+
+  let net = getNet()
+  const client = new xrpl.Client(net)
+  results = `\n\n===Creating Credential===\n\nConnecting to ${getNet()} ...`
+  updateResults()
+  await client.connect()  
+  results = `\n\nConnected.`
+  updateResults()
+
+  try {
+  
+  // Get account wallet from seed
+  const wallet = xrpl.Wallet.fromSeed(accountSeedField.value)
+  
+  // Get subject
+  const subject = subjectField.value
+  
+  // Get credential type - convert string to hex if needed
+  let credentialType = credentialTypeField.value;
+  if (!/^[0-9A-F]+$/i.test(credentialType)) {
+    let hex = '';
+    for (let i = 0; i < credentialType.length; i++) {
+      const charCode = credentialType.charCodeAt(i);
+      const hexCharCode = charCode.toString(16).padStart(2, '0');
+      hex += hexCharCode;
+    }
+    credentialType = hex.toUpperCase();
+  }
+  
+  // Prepare transaction
+  const transaction = {
+    "TransactionType": "CredentialCreate",
+    "Account": wallet.address,
+    "Subject": subject,
+    "CredentialType": credentialType
+  }
+  
+  results = `\n\n===Preparing and Sending Transaction===\n\n${JSON.stringify(transaction, null, 2)}`
+  updateResults()
+  
+  // Submit transaction
+  const tx = await client.submitAndWait(transaction, {autofill: true, wallet: wallet})
+  
+  if (tx.result.meta.TransactionResult == "tesSUCCESS") {
+    // Parse for credential info
+    const parsedResponse = JSON.parse(JSON.stringify(tx.result.meta.AffectedNodes, null, 2))
+    const credentialInfo = parsedResponse.find( node => node.CreatedNode && node.CreatedNode.LedgerEntryType === "Credential" )
+    results = `\n\n===Create Credential Result===\n\n${JSON.stringify(credentialInfo.CreatedNode, null, 2)}`
+    } else {
+    results = `\n\n===Error===\n\n${JSON.stringify(tx.result.meta.TransactionResult, null, 2)}: Check codes at https://xrpl.org/docs/references/protocol/transactions/types/credentialcreate#error-cases`
+    }
+
+  updateResults()
+
+  } catch (error) {
+      results = `\n\n===Error===\n\n${error}`
+      updateResults()
+  }
+  
+  client.disconnect()
+}