RADON API

RADON is a scripting language that retrieves, attests to, and delivers data within the Witnet Decentralized Oracle Network, facilitating the conversion of the request into a CBOR representation and subsequently into a protobuf bytes schema.

There are several components that are used to build a RADON Request.

• RADRequest

• RADFilter

• RADRetrieve

• RADKind

• RADTally

• RADFilter

• RADAggregate

• Filters

• Reducers

RADRequest

Constructor Parameters:

• retrieve

• aggregate

• tally

Request Methods:

Method Name	Method Params	Response
addSource	source	RADRequest
setAggregator	aggregator	RADRequest
setTally	tally	RADRequest
setQuorum	witnesses, min_consensus_percentage	RADRequest
setCollateral	collateral	RADRequest
setFees	reward, commit_and_reveal_fee	RADRequest
schedule	timestamp	RADRequest
setTimestamp	timestamp	RADRequest
asJson	none	Map

addSource

The addSource method pushes a source to the retrieve array and sets the data point type to the last type of the source.

setAggregator

The setAggregator method sets a aggregate field (RADAggregate) for data aggregation.

setTally

Method to set the tally for data aggregation.

rejects unsupported operators

sanitize malformed filters and reject unsupported filters

setQuorum

Method to set the quorum parameters

• witnesses: the number of witnesses

• min_consensus_percentage: the minimum consensus percentage

setCollateral

• collateral: the collateral amount in nanoWIT which needs to be >= 1 WIT e.g. 1000000000 nanoWIT

setFees

• reward: the witness reward

• commit_and_reveal_fee: the commit and reveal fee

schedule

• timestamp

setTimestamp

timestamp

asJson

RADRetrieve

• kind: The enum value representing the RADKind.
• script: the RADON script that specifies the retrieval from the source data.

• url: The URL of the retrieval.

• body: The body is an optional field used for the HTTP request.

• headers: The headers are an optional field used for the HTTP request.

RADKind

Each RADRetrieve object is associated with a RADKind, represented by an enum with values ranging from 0 to 3. The possible enum values are "Unknown," "HTTP-GET," "RNG," and "HTTP-POST."

• Unknown: An unknown RAD Request type.

• HTTP-GET: A HTTP GET Request

• RNG: A request to generate a secure random number.

• HTTP-POST: A request to generate a secure random number.

// Retrieve data from a HTTP-GET Source
const httpGetSource = new Witnet.Source("https://...")
// Retrieve a secure random number
const randomSource = new Witnet.RandomSource()
//Retrieve data from a HTTP-POST Source
const httpPostSource = new Witnet.Source("https://...",
  ``
)
// Retrieve data from a GraphQL Source
const graphQLSource = new Witnet.GraphQLSource("https://api.thegraph.com/subgraphs/name/beamswap/beamswap-dex"
 `{
    pair(id:\"0x61b4cec9925b1397b64dece8f898047eed0f7a07\")
      { 
        token0Price 
      } 
  }`
)

OP Code	Name	Description
0x00	Unknown	An unknown RAD Request type.
0x01	HTTP-GET	A HTTP GET Request
0x02	RNG	A request to generate a secure random number.
0x03	HTTP-POST	A request to generate a secure random number.

RADTally

• filters: An array of RADFilters.

• reducer: A Single RADReducer.

A RADTally has an array of of type RADFilter and a single RadonReducer.

// Filters out any value that is more than 2.5 times the standard
// deviationaway from the average, then computes the average mean of the
// values that pass the filter.
const tally = new Witnet.Tally({
  filters: [
    [Witnet.Types.FILTERS.deviationStandard, 2.5],
  ],
  reducer: Witnet.Types.REDUCERS.averageMean,
})

RADFilter

Constructor Parameters:

• op: The op parameter refers to a RADONFilter OP Code, the available codes are listed below.

• args:

RADAggregate

• RADFilter:

• RadonReducer:

A RADAggregate has an array of type RADFilter and a single RadonReducer.

// Filters out any value that is more than 1.4 times the standard
// deviationaway from the average, then computes the average mean of the
// values that pass the filter.
const aggregator = new Witnet.Aggregator({
  filters: [
    [Witnet.Types.FILTERS.deviationStandard, 1.4],
  ],
  reducer: Witnet.Types.REDUCERS.averageMean,
})

RAD Filters

deviationStandard

Discards any result that is more than the provided input times the standard deviations times away from the average.

OP Code: 0x05

mode

Discards any result that is the different from the mode.

OP Code: 0x08

RAD Reducers

mode

Computes the mode of the values.

OP Code: 0x02

averageMean

Computes the average mean.

OP Code: 0x03

averageMedian

Computes the average median.

OP Code: 0x05

deviationStandard

Computes the standard deviation.

OP Code: 0x07

hashConcatenate

Computes the hash and concatenates the values.

OP Code: 0x0B