ChainlinkClientUtils

_Chainlink client refactored into library and all unused functions removed Uses price aggregator facet of multi collat diamond for storage.

Copy of https://github.com/smartcontractkit/chainlink/blob/contracts-v0.5.1/contracts/src/v0.8/ChainlinkClient.sol with only requestCount changed to unset so as to be inherited by a proxy implementation._

ChainlinkRequested

event ChainlinkRequested(bytes32 id)

ChainlinkFulfilled

event ChainlinkFulfilled(bytes32 id)

_getSlot

function _getSlot() internal pure returns (uint256)

Returns storage slot to use when fetching storage relevant to library

_getStorage

function _getStorage() internal pure returns (struct IPriceAggregator.PriceAggregatorStorage s)

Returns storage pointer for storage struct in diamond contract, at defined slot

buildChainlinkRequest

function buildChainlinkRequest(bytes32 specId, address callbackAddr, bytes4 callbackFunctionSignature) internal pure returns (struct Chainlink.Request)

Creates a request that can hold additional parameters

Parameters

Name	Type	Description
specId	bytes32	The Job Specification ID that the request will be created for
callbackAddr	address	address to operate the callback on
callbackFunctionSignature	bytes4	function signature to use for the callback

Return Values

Name	Type	Description
[0]	struct Chainlink.Request	A Chainlink Request struct in memory

sendChainlinkRequestTo

function sendChainlinkRequestTo(address oracleAddress, struct Chainlink.Request req, uint256 payment) internal returns (bytes32 requestId)

Creates a Chainlink request to the specified oracle address

Generates and stores a request ID, increments the local nonce, and uses transferAndCall to send LINK which creates a request on the target oracle contract. Emits ChainlinkRequested event.

Parameters

Name	Type	Description
oracleAddress	address	The address of the oracle for the request
req	struct Chainlink.Request	The initialized Chainlink Request
payment	uint256	The amount of LINK to send for the request

Return Values

Name	Type	Description
requestId	bytes32	The request ID

setChainlinkToken

function setChainlinkToken(address _linkErc677) internal

Sets the LINK token address

Parameters

Name	Type	Description
_linkErc677	address	The address of the LINK token contract

validateChainlinkCallback

function validateChainlinkCallback(bytes32 requestId) internal

Ensures that the fulfillment is valid for this contract

Use if the contract developer prefers methods instead of modifiers for validation

Parameters

Name	Type	Description
requestId	bytes32	The request ID for fulfillment

recordChainlinkFulfillment

modifier recordChainlinkFulfillment(bytes32 requestId)

Reverts if the sender is not the oracle of the request. Emits ChainlinkFulfilled event.

Parameters

Name	Type	Description
requestId	bytes32	The request ID for fulfillment