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Building a Decentralized Wallet SDK and App

Introduction​

We are developing a custom decentralized wallet software development kit (SDK) and mobile application for a client. This will allow the client to launch their own crypto token and wallet for sending, receiving, and storing it.

The SDK provides an interface to the underlying blockchain infrastructure. The mobile app leverages the SDK to create an easy to use wallet.

SDK Overview​

The SDK will be written in Golang and provide methods for wallet generation, cryptographic functions, and interacting with the blockchain. Key features:

  • Generate public/private keypairs for new wallets
  • Sign and verify transaction messages
  • Broadcast signed transactions to the network
  • Encrypt and decrypt wallet data
  • Interface with the smart contract to transfer tokens
  • Maintain balances, transaction histories, and other account data

The SDK will handle all the blockchain integration and complexity behind a simple interface. It can be imported into any client apps.

Mobile Wallet App​

The mobile app will be built with Flutter for native iOS and Android support. It will showcase the capabilities of the SDK and provide an intuitive user experience.

The app allows users to:

  • Create and import wallets
  • Send/receive tokens
  • View balances and transaction histories
  • Encrypt wallets with biometrics
  • Interact with decentralized apps

Flutter's reactive frameworks like Riverpod simplify complex state management. A responsive UI is built using Material Design widgets. Deep linking support enables easy onboarding.

Additional Considerations​

Design Considerations

The decision to build our own custom crypto wallet SDK was made after careful consideration of the following factors:

  • Security: Third-party SDKs are often black boxes, making it difficult to assess their security posture. By building our own SDK, we can implement the latest security best practices and have full control over the codebase. This gives us the confidence that our SDK is secure and can withstand even the most sophisticated attacks.
  • Maintainability: Third-party SDKs can be difficult to maintain, especially as they are updated with new features and security patches. By building our own SDK, we have complete control over the development and maintenance process. This allows us to quickly and easily fix bugs, add new features, and adapt to the evolving needs of the cryptocurrency industry.
  • Customization: Third-party SDKs may not offer the level of customization that we require for our project. By building our own SDK, we can tailor it to our specific needs and requirements. This gives us the flexibility to implement the features and functionality that our users need most.
  • Cost: In the long term, building our own SDK is more cost-effective than using a third-party SDK. This is because we avoid the recurring costs of licensing and support fees. Additionally, we can avoid the hidden costs of vendor lock-in and the need to pay for features that we don't need.

By building our own custom crypto wallet SDK, we are investing in the long-term security, maintainability, customization, and cost-effectiveness of our solution. This investment will pay off handsomely as our project grows and evolves.

In addition to the above, I would like to add that building our own SDK gives us the freedom to innovate and experiment. We are not bound by the limitations of a third-party SDK, and we can explore new ideas and technologies without having to worry about compatibility issues. This allows us to stay ahead of the curve and develop a truly cutting-edge crypto wallet solution.

I believe that the benefits of building our own crypto wallet SDK far outweigh the costs. By investing in this long-term solution, we are setting ourselves up for success in the rapidly evolving cryptocurrency industry.