How it works

The Wallet class (can be created via create_wallet function) each minute updates its full state via GQL API:

• Configuration settings
• User's UTXO's of Cweb
• List of user's held custom tokens and their balances

User's UTXO's of Cweb, list of user's held custom tokens and their balances are retrieved as claims via single fetchClaims GQL query by specifying combined ClaimFilters (this is important for performance).

The Wallet class gets real-time updates on user's UTXO's of Cweb, list of user's held custom tokens and their balances via subscription (incremental updates to state).

Current balance of some token (including Cweb) can be retrieved via get_token_balance function. A token (including Cweb) can be sent via compose_send function. Both functions accept token_ref as parameter, it is null for Cweb. Both functions use cached data and do not make any additional calls to backend.

ClaimFilters for retrieving list of user's held custom tokens and their balances are get from Tokenization Computation Block. Given resulting claims Tokenization Computation Block returns list of user's held custom tokens and their balances.