Alephium

dApps built on Alephium can leverage DIA oracles to access up-to-date asset price information.

DIA is a cross-chain oracle provider that sources granular market data from diverse exchanges, including CEXs and DEXs. Its data sourcing is thorough, enabling unparalleled transparency and customizability for resilient price feeds for 20,000+ assets. Its versatile data processing and delivery ensures adaptability and reliability for any decentralized application.

Oracle details

Chain	Address
Mainnet	285zrkZTPpUCpjKg9E3z238VmpUBQEAbESGsJT6yX7Rod
Testnet	216wgM3Xi5uBFYwwiw2T7iZoCy9vozPJ4XjToW74nQjbV

Oracle configuration

Pricing Methodology	VWAPIR
Deviation (%) & Refresh Frequency	0.2% and 120 seconds
Heartbeat	10mins

Asset feeds

Asset Ticker	getValue(key)	Asset Markets
BTC	BTC/USD	BTC markets
USDC	USDC/USD	USDC markets
ETH	ETH/USD	ETH markets
WBTC	WBTC/USD	WBTC markets
USDT	USDT/USD	USDT markets
ALPH	ALPH/USD	ALPH markets
AYIN	AYIN/USD	AYIN markets

How to access data​

Locate one of the deployed contracts (either testnet or mainnet) and call the getValue function. This function expects one parameter, which is the symbols of the asset you want to retrieve and a “/USD”, so for example for the Bitcoin price the parameter must be “BTC/USD”.

This will return two values:

1. The price of the asset, with 8 decimals.

2. The timestamp of the last update in Unix time format, in UTC timezone.

Below is the DIAOracle contract implementation in Ralph:

Contract DIAOracle(
    mut admin: Address
) extends DIAOracleBase(admin) implements IDIAOracle {
    mapping[ByteVec, DIAOracleValue] onchainValues

    event OracleUpdate(key: ByteVec, value: U256, timestamp: U256)

    const MaxBatchSize = 10

    enum ErrorCodes {
        InvalidBatchSize = 1
        InvalidKey = 2
    }

    pub fn getValue(key: ByteVec) -> DIAOracleValue {
        if (!onchainValues.contains!(key)) {
            panic!(ErrorCodes.InvalidKey)
        }

        return onchainValues[key]
    }

    @using(preapprovedAssets = true)
    pub fn setValue(key: ByteVec, value: U256, timestamp: U256) -> () {
        checkAdmin(callerAddress!())
        updateValue{admin -> ALPH: mapEntryDeposit!()}(key, value, timestamp)
    }

    @using(preapprovedAssets = true)
    pub fn setMultipleValues(
        keys: [ByteVec; 10],
        values: [U256; 10],
        timestamps: [U256; 10],
        batchSize: U256
    ) -> () {
        checkAdmin(callerAddress!())
        assert!(batchSize <= MaxBatchSize, ErrorCodes.InvalidBatchSize)

        for (let mut i = 0; i < batchSize; i = i + 1) {
            updateValue{admin -> ALPH: mapEntryDeposit!()}(
                keys[i],
                values[i],
                timestamps[i]
            )
        }
    }

    @using(preapprovedAssets = true)
    fn updateValue(key: ByteVec, value: U256, timestamp: U256) -> () {
        if (!onchainValues.contains!(key)) {
            onchainValues.insert!(admin, key, DIAOracleValue{value, timestamp})
        } else {
            onchainValues[key] = DIAOracleValue{value, timestamp}
        }

        emit OracleUpdate(key, value, timestamp)
    }
}

Support

For developer assistance, connect with the DIA team directly on Discord or Telegram.

Developers seeking other specialized, production-grade oracle with tailored price feeds and configurations can initiate the request by contacting the DIA BD Team via Telegram.