@asyncio.coroutine<EOL><INDENT>def eth_getTransactionByHash(self, txhash):<DEDENT>
result = yield from self.rpc_call('<STR_LIT>', [txhash])<EOL>return result<EOL>
https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_gettransactionbyhash

        :param txhash: Transaction hash
        :type txhash: str

        :return: transaction
        :rtype: dict or None