  Smart contracts are dependent on oracle systems for their adoption and
usability. We perform an empirical study of oracle systems' usage trends and
adoption metrics to provide better insight into the health of the smart
contract ecosystem. We collect ChainLink usage data on the Ethereum network
using a modified Ethereum client and running a full node. We analyze the
collected data and present our findings and insights surrounding the usage
trends, adoption metrics, oracle pricing and service quality associated with
ChainLink on the Ethereum network.
