A wallet service is used to send and receive funds. Major challenges for building a wallet service are security and trust. Users must feel that their funds are secure and the administrator of the wallet service doesn't steal their funds. The wallet service we will build in this chapter will tackle both these issues.
In this chapter, we'll cover the following topics:
- Difference between online and offline wallets
- Using hooked-web3-provider and ethereumjs-tx to make it easier to create and sign transactions using accounts not managed by an Ethereum node
- Understanding what a HD wallet is and also its uses
- Creating an HD wallet and a transaction signer using lightwallet.js
- Building a wallet service