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I am thinking about an application which consists of two main components; off-chain database and ethereum blockchain for managing the accesses to the off-chain database. Is there any similar sample? The main challenge for me is connecting the off-chain database to smart contracts. I am not sure using oraclize is an appropriate solution for this application. Do I need to write my own framework to forward requests from off-chain database to smart contracts? If yes can you help me how should I start?

I would be appreciated if you introduce some helpful sources.

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Search Google for the words "DAPP," "Distributed Application," "Solidity," "Web3.0," "Truffle," "RPC," "EVM," "MyEtherWallet," "Metamask," "Infura," and read, read, read. These are sort of the basics.

If you have a moderately good understanding of each of these things, you'll be on your way. I ordered the words in the way you might come to understand the issues. Perhaps others will add to or expand the list.

"Forwarding requests from off-chain database to smart contracts" is basically a DAPP.

Edit by Original Answerer A Year Later:

Knowing what I know now, I think I should have called this "using an oracle".

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