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I watched some videos about Metamask but I am so confused by it

Metamask: To use the final application like the end user would.

Based on that, what is the purpose of React then?

What are the differences between Ganache and Metamask?

closed as too broad by Raghav Sood, Achala Dissanayake, Ismael, Nicolas Massart, flygoing Aug 6 '18 at 19:28

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Those two products are completely different.

Metamask is a blockchain wallet (account management) that secures a private key and helps you to interact with an Ethereum Blockchain network (like mainnet, testnet, private networks or local).

It's a Browser extension (Chrome/Firefox/Brave) that triggers a popup when a user tries to send a transaction to the blockchain, in this popup, the user needs to accept the transaction (sign the transaction with the private key).

Your dApp is a web application (React or other), rather than interacting with a traditional HTTP API, it interacts with a blockchain that requires client signature (using private key) to send a transaction.

Metamask manages that part of handling securely your private keys, signing transactions and communicating with the network.

Metamask is a tool for dApp users.

Metamask Knowledge Base for more information


Ganache is a tool for developers that allows you to run a private and local blockchain on your machine. It's a very useful tool because a blockchain is a complex peer2p distributed system, so it allows developers to deploy and test locally their development (smart contracts) before going to a public network (mainnet or testnet)

Ganache is a tool for dApp developers.

Ganache documentation

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