如何找出以太坊地址是否是合约？ [英] How to find out if an Ethereum address is a contract?

问题描述

Solidity中的地址可以是帐户或合同（或其他事物，例如交易）。当我有一个变量x并保存一个地址时，如何测试它是否是合同？

An address in Solidity can be an account or a contract (or other things, such as a transaction). When I have a variable x, holding an address, how can I test if it is a contract or not?

（是，我已经阅读过有关类型的章节（在文档中）

(Yes, I've read the chapter on types in the doc)

推荐答案

编辑：自从首次编写此答案以来，可靠性已经发生了变化，@manuel-aráoz具有正确的答案。

Solidity has changed since this answer was first written, @manuel-aráoz has the correct answer.

没有牢固地检查地址是否为合同。以太坊的目标之一是将人类和智能合约同等对待。这导致了智能合约与人类和其他合约无缝交互的未来。将来可能会有所变化，但就目前而言，任意地址尚不明确。

There is no way in solidity to check if an address is a contract. One of the goals of Ethereum is for humans and smart contracts to both be treated equally. This leads into a future where smart contracts interact seamlessly with humans and other contracts. It might change in the future , but for now an arbitrary address is ambiguous.

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