Ethereum Resource Adapter Oracle SPI
If you want to develop your own Gas Price Oracle, you need to provide an implementation against the Oracle SPI.
A basic implementation looks as follows:
@GasPriceOracleType("my-oracle")
@ApplicationScoped
public class MyGasPriceOracle implements GasPriceOracleSpi {
@Override
public BigInteger getGasPrice(Integer maxDuration) {
// do your magic here
}
@Override
public BigInteger getMaxFeePerGas() {
// do your magic here
}
@Override
public BigInteger getMaxPriorityFeePerGas(Integer maxDuration) {
// do your magic here
}
}If you need access to the underlying Ethereum connection, you can inject it via:
@Inject
@OracleEthereumConnectionFactory
private EthereumConnectionFactory ethereumConnectionFactory;You can listen for several Ethereum events via CDI observers:
private void observePendingTransaction(@Observes PendingTransactionEvent pendingTransactionEvent) {
}
private void observeLatestBlock(@Observes LatestBlockEvent latestBlockEvent) {
}
public void observeConnectionStatus(@Observes ConnectionStatusEvent event) {
}