oracle05.sol

//called by the oracle to record its answer
function updateRequest (
  uint _id,
  string memory _valueRetrieved
) public {

  Request storage currRequest = requests[_id];

  //check if oracle is in the list of trusted oracles
  //and if the oracle hasn't voted yet
  if(currRequest.quorum[address(msg.sender)] == 1){

    //marking that this address has voted
    currRequest.quorum[msg.sender] = 2;

    //iterate through "array" of answers until a position if free and save the retrieved value
    uint tmpI = 0;
    bool found = false;
    while(!found) {
      //find first empty slot
      if(bytes(currRequest.anwers[tmpI]).length == 0){
        found = true;
        currRequest.anwers[tmpI] = _valueRetrieved;
      }
      tmpI++;
    }

    uint currentQuorum = 0;

    //iterate through oracle list and check if enough oracles(minimum quorum)
    //have voted the same answer has the current one
    for(uint i = 0; i < totalOracleCount; i++){
      bytes memory a = bytes(currRequest.anwers[i]);
      bytes memory b = bytes(_valueRetrieved);

      if(keccak256(a) == keccak256(b)){
        currentQuorum++;
        if(currentQuorum >= minQuorum){
          currRequest.agreedValue = _valueRetrieved;
          emit UpdatedRequest (
            currRequest.id,
            currRequest.urlToQuery,
            currRequest.attributeToFetch,
            currRequest.agreedValue
          );
        }
      }
    }
  }
}