Requirements

Should:

• get all pairs from factory (pair and token addresses)
• restore all liquidities and token ratios for all pairs when reboots or connection is lost
• store all handled information into a persisted store
• retrieve tokens metadata
• listen factory and pairs events and update stored pairs information (liquidity and reserves)
• create a SYNCED/UNSYNCED pair state when boots up in the sequently process of syncing the pairs information
• have a global SYNCED/UNSYNCED flag , to know when the process of syncing has been completed
• be able to compute all routes with less then N nodes from tokenA to tokenB
• have a domain model (javascript data-structures) regarding at least following entities:
  • Pair
    • tokens
    • liquidity
    • reserves
    • chain height at the last update (not sure)
  • Token
  • OfficialToken ( supported token list for DEX-ui )
• expose api for:
  • get pair info (with all SYNCED/UNSYNCED flag)
  • get a route from A -> B
  • get SYNCED/UNSYNCED global flag
  • get token list