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Many of you might think that this question has already been answered but I don't think that there is a clear answer on the internet for the current Ethereum, Web3.js and React Native versions (for 2018). In the blockchain space, answers that are 6 months old are obsolete.

Hello,

I recently created a bunch of Ethereum smart contracts on a custom PoA private network and everything is working great on the browser using MetaMask and Truffle.

Now, the next step is to create a mobile application with React Native to interact with the smart contracts, handle public/private keys, etc (What MetaMask does for the browser).

So my question is: What is the best way to create an Ethereum dApp with React Native with the purpose of only creating and storing cryptographic material, creating and signing transactions? I don't want to create a light client but use the application with platforms like Infura (I know that it is not really decentralized but this is temporary before a light-client is available for Ethereum).

Has anyone already done that with web3.js v.1.0? What are the difficulties? Is web3.js enough? Can it be used with React Native?

Thank you

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You basically just need a provider (like metamask) for your react native app. Everything else works both on a web browser and react native.

Check this: https://www.google.co.in/search?q=metamask+react+native&rlz=1C5CHFA_enIN786IN786&oq=metamask+react+native&aqs=chrome.0.0j69i57.4526j0j7&sourceid=chrome&ie=UTF-8

  • Hi InfinitePrime, Thanks. If I understand correctly, using Web3 ProviderEngine from Metamask allows me to use all the wallet functionalities inside a RN app? This will be like having Metamask inside the application? There is sadly no documentation about this on their repo. – Dario Anongba Varela Apr 12 '18 at 9:24
  • Mostly, yes. But that is just the engine. You need to add more functionality on top of that. – InfinitePrime Apr 12 '18 at 10:18
  • using a provider does not answer the quesiton at all. It is for the moment impossible to use web3js with React Native and that's exactly what I need. If web3js works, using a provider is trivial. – Dario Anongba Varela Apr 20 '18 at 13:33
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I have built and documented a react native boilerplate and shared the source code. You can see it here: https://jacksonng.org/minimum-viable-wallet-1

I used web3 and Ethereum light wallet modules to allow account creation and contract reading and signing.

With rn-nodify and node-lib-browser, it is possible to have web3 running in React Native.

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