where is ethereum contract instance state stored???

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Does ethereum contact instance state stored in blockchain? And when an updated contract is deployed ,how to restore previous instance state into the new contact instance?

Jun 1, 2018 in Blockchain by Johnathon
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Migrating the state to a new version of your contract is the developer’s responsibility. If the data for your contract is tightly coupled (resides in the same contract), then you have to extract the data manually and deploy it with the new version.

answered Jun 1, 2018 by Shashank
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