ETH(以太坊)即将迎来第6次硬分叉，君士坦丁堡硬分叉。ETH团队此前已确定1月16日（大约北京时间1月17日上午作为以太坊网络升级的正式日期，但在ChainSecurity（区块链安全公司）发现（新版本中的）代码存在潜在漏洞后决定推迟。
ETH (Etheria) is approaching its sixth hard fork, Constantinople hard fork. The ETH team has previously set 16 January (an official date for its upgrade on the morning of 17 January, approximately Beijing time), but has decided to postpone it after ChainSecurity (the block chain security company) has discovered a potential bug in the code (in the new version).
总部位于瑞士的区块链安全审计公司表示，目前公布的君士坦丁堡分叉将引入「重入攻击」（简单来说，就是智能合约调用时，多次发送以太坊代币到外部的智能合约，导致用户资产被盗取）的漏洞，即一对黑客可以使用该代码来模拟安全的资金共享服务。
According to the Swiss-based block chain security audit firm, the currently announced Constantinople fork will introduce a “re-entry attack” (simply speaking, when a smart contract is called, a number of smart contracts are sent in Taiyuan currency to the outside, leading to the theft of the user's assets), whereby a hacker can use the code to simulate a secure fund-sharing service.
以太坊核心开发者在本周二（2019年1月15日）宣布他们将推迟他们期待已久的君士坦丁堡硬分叉。
This Tuesday (15 January 2019), the core developer of the Tails announced that they would postpone their long-awaited hard fork in Constantinople.
以太坊自诞生以来一直受到广泛的关注，目前也是使用量最多的的一个通用开发平台。以太坊曾有过数次网络技术升级，现阶段处于路线图「大都会」进程，即将会进行到「君士坦丁堡」阶段。日前，以太坊决定在区块高度 7,080,000 作为「君士坦丁堡」的硬分叉的时间点。
Since its inception, Ether has received widespread attention and is now the most used common development platform. Ether has been upgrading its network technology several times, and it is now in the "Master City" process of the road map, which is going to take place in Constantinople.
由于每次的技术升级阶段都会为市场造成一定的波动影响，因此，我们将会对以太坊进行一个历史分叉调查分析，研究历史上以太坊技术升级对市场引起的影响。
Since each stage of technological upgrading will have a certain volatility effect on the market, we will conduct an analysis of the historical segmentation of the Etherm to examine the historical market implications of the technological upgrading of the Etherms.
ETH已进行5次重点硬分叉。每次分叉的技术升级都是人们关注的焦点，导致的行情波动情况也较为剧烈。
ETH has carried out five hard fork-points. Technical upgrades at each fork are the focus of attention and lead to high volatility.
1. ETH分叉历史
1. & nbsp; ETH split history
ETH官方计划中的技术升级路线图有4个阶段：Frontier（前沿）、Homestead（家园）、Metropolis（大都会）以及Serenity（宁静）。在发展过程中，因为某些突发问题，如解决和抵抗系统网络受攻击等问题在计划外另外硬分叉了3次，分别为The DAO Hard Fork、EIP150 gas cost hard fork以及Spurious Dragon hard fork。
The ETH's official plan for technological upgrading has four phases: Frontier (frontline), Homestead (home), Metropolis (Metropolis) and Serenity (silence).
1-1. Frontier（前沿）到Homestead（家园）
1-1. & nbsp; Frontier (frontline) to Homestead (home)
2015年7月ETH正式诞生，发布Frontier(前沿)到Homestead(家园)，ETH的技术逐渐获得了市场的认可。在Homestead硬分叉前，价格开始急剧上涨。在Homestead升级之后价格稍有回落。
When ETH was officially born in July 2015, when it was released from Frontier to Homestead, ETH technology gained market recognition. Prices began to rise sharply before Homestead’s hard split.
1-2. Homestead（家园）到The DAO Hard Fork
Homestead硬分叉到The DAO事件发生之前，已经有多个项目方开始在ETH进行募资以及发行代币。ETH有了相当的影响力，因此ETH和比特币的价格涨幅开始有趋同情况发生。
Prior to Homestead’s hard split to the DAO incident, several projects had started raising funds and issuing tokens in the ETH. The ETH had considerable influence, so price increases between ETH and Bitcoin began to converge.
但2016年6月黑客攻击ETH生态的The DAO事件之后，ETH生态出现了稳定性问题。当时ETH创始人在7月16日透露出实施硬分叉的消息后，ETH的价格开始明显地上升。7月20日，分叉完成后价格几乎恢复到正常时期。
But there was a problem with the stability of the ETH ecology following the hacker’s attack on the ETH ecology in June 2016. The prices of the ETH began to rise significantly after the ETH’s founder leaked information on the implementation of the hard fork on July 16. On July 20, when the fork was completed, prices almost recovered to normal times.
1-3.The DAO Hard Fork到EIP150 gas cost hard fork
2016年10月18日公布EIP150 gas cost hard fork硬分叉区块高度后，价格往上涨，直到分叉完成当日达到峰值，之后进行一个价格回调。
Following the announcement of EIP150 gas cost hard fork block height on 18 October 2016, prices rose until the fork reached its peak on the day it was completed, followed by a price return.
1-4.EIP150 gas cost hard fork到Spurious Dragon hard fork
1-4.EIP150 gas cost hard fork to Spurious Dragon hard fork
2016年11月22日，Spurious Dragon hard fork硬分叉时，并没有发生对市场很大的影响。升级完成后，出现了一小段时间的价格回调阶段。
On November 22, 2016, Spurious Dragon hard hard fork did not have a significant impact on the market. When the upgrade was completed, there was a short period of price recovery.
1-5.EIP150 gas cost hard fork到Spurious Dragon hard fork
2017年10月16日，公布Byzantium硬分叉时整个行情处于不稳定阶段。但硬分叉前后时间阶段的趋势与之前一致，价格逐渐上升直至分叉完成，分叉完成后出现正常的价格回调阶段。
On 16 October 2017, Byzantium was declared to be in a state of instability. But the trend was consistent with the period before and after the hard fork, with prices gradually rising until the fork was completed, and a normal price recovery phase followed when the fork was completed.
2.五次硬分叉涨跌情况总结
ETH历史上5次硬分叉，分叉前一周有4次上涨，分叉后一周有4次下跌。
The ETH has five hard forks in history, four rises in the week before and four drops in the week after the fork.
Homestead、The Dao Hard Fork和Byzantium Hard Fork这三次硬分叉前一周的市场涨幅较高。这三次分叉属于对ETH本身影响较大的技术升级，因此对于市场的波动影响也较大。总体来说，ETH分叉会造成市场剧烈波动。
Homestead, The Dao Hard Fork and Byzantium Hard Fork have experienced a higher increase in the market in the week before the three hard forks. These three forks are technological upgrades that have a greater impact on the ETH itself, and therefore have a greater impact on market volatility. Overall, the ETH forks cause market volatility.
此次ETH硬分叉，能否像以太坊之前带来的改变，能否带动一波价格行情，是否预试着筑底开启，无可而知。希望此次硬分叉让投资者感受到一丝暧意。
It is not clear whether this ETH hard fork, like the changes that Etherm has brought before, can trigger a wave of price developments, and whether it can pre-empt the bottom opening. It is hoped that this hard fork will give investors a glimmer of meaning.
声明：本文不构成任何投资建议，任何人据此做出投资决策，风险自担。
states that this document does not constitute an investment proposal on the basis of which any person makes an investment decision at his or her own risk.
本文首发于微信公众号：Bitmaster。文章内容属作者个人观点，不代表和讯网立场。投资者据此操作，风险请自担。
The article is based on the author’s personal opinion and does not represent the network’s position.
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