 Object Properties Name Type Description address HexString contract address See: https://github.com/nebulasio/wiki/blob/master/rpc.md#gettransactionbycontract Returns: the same as TransactionReceipt Example var api = new Neb().api; api.getTransactionByContract({address: \"n1sqDHGjYtX6rMqFoq5Tow3s3LqF4ZxBvE3\"}).then(function(receipt) { //code }); subscribe(options) Return the subscribed events of transaction &amp; block. Parameters: Name Type Description options Object Properties Name Type Description topic