How to store state data in Ethereum blockchain

+1 vote

Suppose I have an array of 200M users, now you wish to store more users (say 500M). Since each word of storage on the Ethereum blockchain requires 20K in gas fees.

Now, if I update a user's score and thus update the contract, do I need to store entire 500M words again??

Apr 25, 2018 in Blockchain by Johnathon
• 9,090 points
999 views

1 answer to this question.

+1 vote
Best answer

You won't have to overwrite the whole array if you're not changing the order of records. You just have to pay gas for the data that you add or update.

answered Apr 25, 2018 by Shashank
• 10,400 points

selected Aug 10, 2018 by Omkar

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