📃 UsingWitnetRequest

🧙Solidity wizard

Constructor

Parameters	Type	Description
_witnetRequest	WitnetRequest	Address of the WitnetRequestinstance to use as reference when querying data updates to WitnetOracle.
_baseFeeOverHeadPercentage	uint16	Percentage over base fee to pay when querying new data updates.

Properties

Name	Visibility	Description
dataRequest	Immutable public	Address of the WitnetRequestinstance passed in the constructor.
__witnet	Immutable internal	Address of the WitnetOracle instance to directly interact with.
__witnetBaseFeeOverheadPercentage	Internal	Percentage over base fee to pay when querying new data updates. Defaults to 33%.
__witnetDefaultSLA	Internal	Default Service Level Agreement parameters to be fulfilled by the Wit/Oracle blockchain when solving data updates.
__witnetRequestRadHash	Immutable internal	Immutable RAD hash identifying the actual sources and computations being solved by the Wit/Oracle upon every data update.

Internal methods

Methods	Description
_witnetCheckQueryResponseStatus(uint256)	Check current WitnetV2.ResponseStatus of the specified query.
_witnetCheckQueryResultAvailability(uint256)	Check if the specified query was already reported back from the Wit/Oracle blockchain.
_witnetCheckQueryResultError(uint256)	Get detailed Witnet.ResultError for the specified query.
_witnetEstimateEvmReward()	Estimate the minimum reward required for posting a data request, using tx.gasprice as a reference.
__witnetRequestData(uint256 _evmReward)	Post a data query in expectation that it will get eventually solved and reported from the Wit/Oracle blockchain, specifying how much fee to pay out from this contract's balance.
__witnetRequestData(uint256, RadonSLA)	Post a data query in expectation that it will get eventually solved and reported, specifying how much fee to pay and the SLA parameters to be fulfilled by the Wit/Oracle blockchain.

Events

Events	Arguments	Description
WitnetQuery	address evmRequester uint256 evmGasPrice uint256 evmReward uint256 queryId bytes32 queryRadHash RadonSLA querySLA	Emitted every time a new randomize query gets posted to the WitnetOracle contract.
WitnetQueryUpgrade	uint256 queryId address evmSender uint256 evmGasPrice uint256 evmReward	Emitted if the EVM reward for solving a previously posted randomize is increased by anyone in any amount.