Use this external adapter to verify the contents of a HTML element in a web page, in a DOM-enabled environment

This external adapter requires an instance of browserless running self-hosted or in the cloud.

• url, the url to visit
• selector, CSS the selector in the page to verify,
• challenge, the string to find in the HTML element

Returns true if the challenge is found in the selector

{
 "jobRunID": "278c97ffadb54a5bbb93cfec5f7b5503",
 "data": {
  "result": true
 },
 "statusCode": 200
}

If you wish to test this adapter in a test environment, please use the following oracle address and job ID :

Oracle address : 0xc897AB197611d16e4ABD18878aba8c85c8f370a9

Use in solidity :

  // configuration
  address oracle = 0xc897AB197611d16e4ABD18878aba8c85c8f370a9;
  bytes32 jobId = "fb4b27d00d704c3da5e16282e705f190";
  uint256 oracle_fee = 0.1 * 10 ** 18;

  // Submit your request to the oracle
  Chainlink.Request memory request = buildChainlinkRequest(jobId, address(this), this.fulfill.selector);
  request.add("url", "my_url"); 
  request.add("selector", "my_css_selector"); 
  request.add("challenge", "my_challenge");
  return sendChainlinkRequestTo(oracle, request, oracle_fee);

  // Callback your request is fulfilled
  function fulfill(bytes32 _requestId, bool _value) public recordChainlinkFulfillment(_requestId)
  {
    _value // true if the verification was successful
  }
}

Install dependencies:

npm install

Required env variables:

export BROWSERLESS_URL="http://localhost:3000"

Run : (defaults to port 8080):

npm run start

Any error during the browserless runtime (element not found, timeout, or other errors) will result in a successful request false result