In a blockchain, an oracle is a way to bring real-world off-chain data onto the blockchain so that it can be used by a decentralized application.
Oracles serve many purposes for application builders. For example,
Most stablecoin designs use an oracle to bring in data of the exchange rate of assets, in order to peg their value to a real world currency.
Synthetic assets use oracles as price feeds in order to determine if the underlying cryptocurrency sufficiently collateralizes the debt position.
Prediction markets use oracles to decide the outcome of real world events and determine the payout of the prediction shares.
Decentralized insurance markets use oracles to bring in information about whether a claim is valid or not.
Oracle solutions range from centralized and trusted to decentralized and game-theory based. On the centralized end of the spectrum, an oracle could be a single account that has the authority to dictate the real-world data on-chain. On the decentralized end, a complex game of "chicken" can be played among various staked actors who risk getting slashed if they don't submit the same data as everyone else. Solutions such asChainLink fit somewhere in the middle, where the amount of trust you put into the reporting oracles can be adjusted based on your preferences.
How we use them
CryptoArena is a hybrid entity featuring the power of off-chain scalability and the manipulation-free accountability of cutting-edge blockchain technology. Oracles are what ties the two together.
Watcher nodes are Oracles is designed to feed data of transactions going in and out of specific wallets (off chain)to the revenue distributions chain (on chain).
The information transmitted by oracles includes: Transaction data, Glory Points and Timestamps to actively determine individual User shares. Counter nodes receive this data and tally it into coherent time frames by adding up timestamps to recreate a copy of the the off chain ledger that is available and can be used on chain.