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I want to connect Ganache to Ropsten such that i can see Ropsten's ledger with Ganache. Is this possible? if yes, what settings do I need to do on Ganache?

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Ganache is a local blockchain that you run in your own computer, whereas Ropsten is a public blockchain. Therefore, both are different blockchains, meaning that you connect either to one or another.

You can use Metamask, for instance, and easily change to your local blockchain (Ganache) or a public testnet (Ropsten, Rinkeby, Kovan...).

To set up Ganache with Metamask, go to settings->networks->Add network, and there you can put the values from your Ganache configuration (URL, port, chainId).

EDIT:

As pointed out by @goodvibration, you could actually fork Ropsten network, run it locally (so you would be the only node), and then connect Ganache to this network. This might help you:

Run a local fork of Ropsten

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  • The statement "meaning that you connect either to one or another" is wrong. Ganache is an EVM, not a blockchain network. You can configure it to fork the Ropsten blockchain network, and then simulate your "stuff" on it. – goodvibration Dec 10 '20 at 7:10
  • Well, according to their website: "Ganache is a personal blockchain for rapid Ethereum and Corda distributed application development" (we could debate whether a blockchain network without nodes is really a blockchain). However, I agree that you could fork the Ropsten network, run it locally and connect Ganache to it. – Sergi Juanati Dec 10 '20 at 8:18
  • Hence "you connect either to one or another" is wrong. – goodvibration Dec 10 '20 at 8:20
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    Thanks for your feedback. I updated the answer to include your proposal. – Sergi Juanati Dec 10 '20 at 8:30
  • NP. Note that the answer linked in your answer is a relatively old (though not necessarily obsolete). As of Truffle v5, you can (also) do it directly in the truffle configuration file, as shown here. – goodvibration Dec 10 '20 at 8:53

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