How do I start building a Bitcoin wallet service?

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How do I start building a Bitcoin wallet service?

• 
  blockchainx

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• Coinbase Wallet is one of the most popular.
• Build a token bridge A cryptocurrency wallet is
  software or an application that stores
  cryptocurrencies and other cryptographic items.
• They can be virtual, accessible from the Internet
  or from a mobile application.
• And they can also be stored on a physical device
  similar to a flash drive.

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• How to create a cryptocurrency wallet?
• Build a cross chain bridge Surely you have heard
  of cryptocurrencies. Names like Bitcoin or
  Ethereum are present in many conversations and in
  countless articles, publications and messages on
  social networks. Everyone wants to know more
  about it, to know what they consist of and, why
  not, try their luck with it. But to get started,
  you'll need a cryptocurrency wallet, the
  blockchain equivalent of your physical wallet
  where you keep coins and bills. And Coinbase
  Wallet is one of the most popular.

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• And where is the money or cryptocurrency?
• It is stored on a blockchain, a decentralized
  virtual registry. To possess, sell, buy or
  exchange them you need the corresponding
  passwords or keys. They can be public or private.
• The public key of the wallet or wallet is the
  blockchain equivalent to the bank account. It can
  be shared without putting its content at risk.
  You can receive cryptocurrencies with it. Bridge
  smart contract services The private key is what
  allows you to recover your cryptocurrencies, so
  you should not share it with anyone.

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