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88/**
89 * @notice This method is used to trigger a request to Gelato's vrf coordinator contract.
90 * @dev This contract is only callable by a valid basket contract.
91 * @return requestId -> the request identifier given to us by the vrf coordinator.
92 */
93function makeRequestForRandomWords() external onlyBasket returns (uint256 requestId) {
94    address basket = msg.sender;
95
96    // make request to vrfCoordinator contract requesting entropy.
97    requestId = _requestRandomness(abi.encode(0));
98
99    // store the basket requesting entropy in requestTracker using the requestId as the key value.
100    requestTracker[requestId] = basket;
101    outstandingRequest[basket] = requestId;
102
103    emit RequestSubmitted(requestId, basket);
104}