Integrate tokens endpoints

[sridharmeganathan]

Description

• Replace mock endpoints with actual endpoints to fetch
  • Supported tokens
  • Token and its balances
  • Get token meta data from /api/v3/blockchain/apps/meta/tokens
  • Get token balances (available, locked) from /api/v3/tokens or RPC token_getBalances
  • Get nonce and multisignature information from auth_getAuthAccount
  • Get List of voters from ​​dpos_getVoter
  • Get delegate information from dpos_getDelegate
  • Get supported tokens from selected to application to filter the un-supported tokens to send to receiving chain

Acceptance Criteria

• Users should be able to select the supported tokens and send them to users
• Users should be able to select the supported tokens and request them from users
• Add e2e tests for
  • Send LSK tokens within application
  • Send LSK tokens across application
  • Send native tokens within application
  • Send native tokens across application
  • Receive LSK tokens within application
  • Receive LSK tokens across application
  • Receive native tokens within application
  • Receive native tokens across application