1. Seele RPC API adds interface getShardNum, updates RPC interface document
2. Seeleteam.js api adds getShardNum interface
3. Example code for interacting with contracts based on seeleteam.js
4. Add RPC encoding library to Stem smart contract
5. Refactor the contract code to reduce the gas used
6. Solve “stack too deep” issue related to the Stem smart contract
7. Wallet adds transaction history, directory optimization, account management and related testing
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Github: https://github.com/seeleteam
