It is widely accepted that blockchain systems cannot execute calls to external systems or services due to each node having to reach a deterministic state. However, in this paper we show that this belief is preconceived by demonstrating a method that enables blockchain and distributed ledger technologies to perform calls to external systems initiated from the blockchain/DLT itself.

翻译：人们广泛认为,由于每个节点必须达到一种确定状态,因此封闭链系统无法向外部系统或服务发送电话,但在本文件中,我们表明这种信念是先入为主的,我们展示了一种方法,使封闭链和分布式分类账技术能够向从封闭链/控制网本身发起的外部系统发送电话。