mirror of
https://github.com/autistic-symposium/blockchains-security-toolkit.git
synced 2025-05-13 12:12:19 -04:00
23 lines
874 B
Markdown
23 lines
874 B
Markdown
## 🍣 oracles
|
||
|
||
<br>
|
||
|
||
|
||
* Oracles provide a trustless way of getting extrinsic (off-chain) information.
|
||
* They provide the some key functions such as collect data from an off-chain source, transfer the data on-chain with a signed message, and make the data available by putting it in a smart contract’s storage.
|
||
|
||
|
||
<br>
|
||
|
||
### chainLlink
|
||
|
||
|
||
A decentralized oracle network consisting of three key smart contracts:
|
||
|
||
* a reputation contract: keep track of data providers' performance.
|
||
* an order-matching contract: selects bids from oracles using the reputation contract.
|
||
* an aggregation contract—and an off-chain registry of data providers.
|
||
|
||
|
||
One of the main challenges with such a decentralized approach is the formulation of the aggregation function.
|
||
ChainLink proposes calculating a weighted response, allowing a validity score to be reported for each oracle response.
|