![timeline for ethereum casper](https://nirolution.com/wp-content/uploads/2019/10/3-18.jpg)
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Some people say that proof-of-work and especially Casper, has is chain.
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Some people say that proof-of-work and especially Casper, has is chain.
The Merge will be triggered when the chain reaches a pre-specified terminal total difficulty TTD level, which is a measure of the total cumulative mining power used to build the proof-of-work chain since genesis. Did you enjoy this post? It is estimated that each phase of Serenity will take roughly six to eight months to complete.