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If I create a wallet for Ethereum blockchain, can I use the same wallet (and accounts) for layer 2 Ethereum based blockchains (like Polygon and MATIC coin) as well?

Side note: I've created a wallet using python-hdwallet and loaded that wallet to MetaMask. But I want to be sure if I can safely use this wallet for Polygon (and any other Ethereum based blockchain/currency as well).

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Ethereum private keys and accounts (addresses) are the same across different Ethereum Virtual Machine (EVM) based blockchains. You can make a wallet work in another network by simply switching the Web3 provider to point to a different JSON-RPC endpoint. All JSON-RPC providers have copied the original Ethereum API.

(Note: Rootstock RSK is a notable difference as they are using a different checksum method)

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    Your first sentence ends with "... accross different blockchains". Does that mean ethereum wallets also work for blockchains that are not related to ethereum?
    – MehmedB
    Commented Feb 5, 2022 at 7:07
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    Very good comment. I edited the answer and clarified.
    – Mikko Ohtamaa
    Commented Feb 6, 2022 at 14:56

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