registerContractWithDefinitions.js

const Dash = require('dash')

const clientOpts = {
  network: 'testnet',
  mnemonic: 'a Dash wallet mnemonic with evonet funds goes here'
}
const client = new Dash.Client(clientOpts)

const registerContract = async function() {
  try {
    await client.isReady()
    const platform = client.platform
    const identity = await platform.identities.get('an identity ID goes here')

    const contractDocumentWithDefinitions = {
      documents: {
        note: {
          // Currently unclear how to set indices for nested object properties:
          // indices: [
          //   {
          //     properties: [
          //       {
          //         'message.timestamp': 'asc'
          //       }
          //     ],
          //     unique: false
          //   }
          // ],
          
          properties: {
            // You cannot use definitions at toplevel current, only nested in objects
            // See: https://github.com/dashevo/js-dpp/issues/185
            message: {
              $ref: '#/definitions/msg'
            }
          },
          additionalProperties: false
        }
      },
      definitions: {
        msg: {
          // You cannot use indices here, only at toplevel

          // You can set required properties here
          required: ['timestamp'],
          properties: {
            timestamp: {
              type: 'number'
            },
            description: {
              type: 'string'
            }
          },
          additionalProperties: false
        }
      }
    }
    const { documents, definitions } = contractDocumentWithDefinitions

    const contract = await platform.contracts.create(documents, identity)
    console.dir({ contract })

    // Set contract definitions
    contract.setDefinitions(definitions)
    console.dir({ contract })

    // Make sure contract passes validation checks
    await platform.dpp.dataContract.validate(contract)

    // Sign and submit the data contract
    await platform.contracts.broadcast(contract, identity)
  } catch (e) {
    console.error('Something went wrong:', e)
  } finally {
    client.disconnect()
  }
}

registerContract()