{% content-ref url="../../solidity-wizard.md" %} solidity-wizard.md {% endcontent-ref %}
| Parameters | Type | Description |
|---|---|---|
| _witnetRequestTemplate | WitnetRequestTemplate | Address of the WitnetRequestTemplate from which concrete data requests will get built from this contract. |
| _baseFeeOverheadPercentage | uint16 | Percentage over base fee to pay when querying new data updates. |
| _callbackGasLimit | uint24 | Maximum gas expected to be spent by the callback methods. |
| Modifier | Description |
|---|---|
| onlyFromWitnet | To be added on callback methods for attending query results from the Wit/Oracle. |
| witnetQuerySolved(uint256 queryId) | Provides a convenient way for consuming contracts to block execution of the contract's logic until a particular randomness query gets ultimately reported from the Wit/Oracle blockchain. |
| Name | Visibility | Description |
|---|---|---|
| dataRequestTemplate | Immutable public | Address of the WitnetRequestTemplate passed in 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%. |
| __witnetCallbackGasLimit | Internal | Maximum gas expected to be spent by the callback methods. |
| __witnetDefaultSLA | Internal | Default Service Level Agreement parameters to be fulfilled by the Wit/Oracle blockchain when solving data updates. |
| Methods | Description |
|---|---|
| _witnetBuildRadHash(string[][]) | Creates a unique RAD hash that identifies the resulting Radon Request after applying the given parameters to the dataRequestTemplate. |
| __witnetBuildRequest(string[][]) | Creates a counter-factual WitnetRequest instance that contains the resulting RAdon Request after applying the given parameters to the dataRequestTemplate. |
| _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,string[][]) | Query the Wit/Oracle to solve the resulting Radon Request after applying the given parameters to the dataRequestTemplate, specifying also how much fee to pay out from this contract's balance. |
| __witnetRequestData(u256,string[][],RadonSLA) | Query the Wit/Oracle to solve the resulting Radon Request after applying the given parameters to the dataRequestTemplate, specifying how much fee to pay and the SLA parameters to be fulfilled by the Wit/Oracle blockchain. |
| Events | Arguments | Description |
|---|---|---|
| WitnetQuery |
| Emitted every time a new randomize query gets posted to the WitnetOracle contract. |
| WitnetQueryUpgrade |
| Emitted if the EVM reward for solving a previously posted randomize is increased by anyone in any amount. |