xrpl-dev-portal/_code-samples/modular-tutorials/credential-manager.js

// Create credential function
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()

  // Gather transaction info
  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()
}