ontract.html" class="extype" name="it.unica.blockchain.blockchains.ethereum.EthereumContract">EthereumContract</a></span>, <span name="requestOpt">requestOpt: <span class="extype" name="scala.Option">Option</span>[<span class="extype" name="org.web3j.protocol.core.Request">Request</span>[_, <span class="extype" name="org.web3j.protocol.core.methods.response.EthGetTransactionReceipt">EthGetTransactionReceipt</span>]]</span>)</span><span class="result"> extends <a href="../Transaction.html" class="extype" nam