A node script to run a phone number lookup with ODIS on the Celo blockchain

lookup.js

// In this example, we will go over how to look up a Celo address that is registered with a phone number with ODIS

// 1. Import the appropriate packages
const ContractKit = require('@celo/contractkit')
const OdisUtils = require('@celo/contractkit').OdisUtils
const AuthSigner = require('@celo/contractkit/lib/identity/odis/query').AuthSigner

// 2. Import these packages to help with private key management for the example
const privateKeyToAddress = require('@celo/utils/lib/address').privateKeyToAddress
const normalizeAddressWith0x = require('@celo/utils/lib/address').normalizeAddressWith0x

// 3. connect contractKit to mainnet via Forno
const contractKit = ContractKit.newKit('https://rc1-forno.celo-testnet.org')

// 4. Specify the authentication method and contractKit instance
const authSigner = {
  authenticationMethod: OdisUtils.Query.AuthenticationMethod.WALLET_KEY,
  contractKit: contractKit
}

// 5. Set a phone number to lookup
let phoneNumber = '+11234567890' // this is a fake number

let context = 'mainnet'

// 6. You will need a private key from which to query ODIS. The address associated with this private key
//    will be the account from which the query is made. The account must have a small balance (0.005 CELO or 0.01 cUSD).
const privateKey = '3a26ebc37944c305670a21ea6a5d16c1084db2f18bc6635ba95f487e5c59868f'
const from = normalizeAddressWith0x(privateKeyToAddress(privateKey))

// 7. Import the account to contractKit to sign the query request
contractKit.addAccount(privateKey)

// 8. Wrap the async functions so we can await the responses
let run = async function(){

  // 9. Make the request to ODIS
  const res = await OdisUtils.PhoneNumberIdentifier.getPhoneNumberIdentifier(
    phoneNumber,
    from,
    authSigner,
    OdisUtils.Query.getServiceContext(context)
  )

  console.log(res)

  /*
    { e164Number: '+11234567890',
    phoneHash:
    '0xd5b4028307ee557404bc6819790326dc0194cfc62c0ae5adcd79adb25da0bae8',
    pepper: '+8swDgOD5m138' }
  */

  // 10. Look up the address registered to the returned phoneHash
  const attesationsContract = await contractKit.contracts.getAttestations()
  let mapping = await attesationsContract.lookupIdentifiers([res.phoneHash])

  console.log(mapping)

  /*
   { '0xd5b4028307ee557404bc6819790326dc0194cfc62c0ae5adcd79adb25da0bae8':
   { '0xDcD7335735F2c4bC7228E3d59D3D05e69Bb73809': { completed: 3, total: 4 },
     '0xE609135E96aA3424c05e940A6D2693d674bc9fDD': { completed: 3, total: 3 } } }
  */
}

run()