E-sign with JavaScript

const variables = {
  name: `Test Docs - ${signerName}`,
  signatureEmailSubject: 'Custom email subject',
  signatureEmailBody: 'Custom please sign these documents....',
  files: [
    {
      id: 'sampleTemplate',
      castEid: pdfTemplateID,
    },
  ], data: {
    payloads: {
      // 'sampleTemplate' is the sample template ID specified above
      sampleTemplate: {
        data: {
          name: signerName,
          email: signerEmail,
        }
      }
    }, signers: [
    {
      id: 'signer1',
      name: signerName,
      email: signerEmail,
      signerType: 'email',
      // These fields will be presented when this signer signs.
      fields: [
        {
          fileId: 'sampleTemplate',
          fieldId: 'signature',
        }
      ]
    }
  ]
}

const anvilClient = new Anvil({ apiKey })
const { statusCode, data, errors } = await anvilClient.createEtchPacket({ variables })
const packetDetails = data.data.createEtchPacket
console.log('Visit the new packet on your dashboard:', packetDetails.detailsURL)