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Worker Layer

The worker is responsible for fetching new blocks from the node and insert them in the database.
The main entry point is the index.js file, which requires all the different worker queues.

Queues

  1. Blocks queue: the main queue for fetching blocks
  2. Contracts queue - updates active contracts' expiry block
  3. Executions queue - Fetches contract executions from addressdb and inserts into the database
  4. Infos queue - update general infos like software versions from github
  5. Votes queue - Adds valid CGP/REPO votes
  6. Snapshots queue - take snapshots for CGP/REPO semesters/intervals
  7. Reorgs scan queue: search for reorgs in the whole blockchain (currently not in use)

Run-Once nodejs scripts

in worker/run-once are several convenience scripts available,
each script can be run from the root folder as node worker/run-once/<name of script>

  1. insertAllExecutionsForAllExistingContracts
    insert all executions for each contract in the database

  2. insertAllContractsFromTransactions
    Go over the whole blockchain, search for contracts and insert them to the database If the contract already exists - update it
    available flags:

    • -b <block number> - specify the block to start to search from

  3. insertVoteIntervals Insert REPO vote intervals in batch

Usage: insertVoteIntervals [options]

Options:
  -b, --begin      The start block                                               [required] [number]
  -l, --length     The interval length in blocks                                 [required] [number]
  -g, --gap        The gap between intervals in blocks                           [required] [number]
  -a, --amount     The amount of intervals to insert                             [required] [number]
  -t, --threshold  The threshold in Kalapas for a valid candidate                [required] [number]
  -h, --help       Show help                                              [commands: help] [boolean]

  1. searchContract
    Search from last block in node backwards for a transaction with a contract, stops when found.

  2. searchReorg
    Search the blocks table for reorgs, Will return the first fork it finds
    available flags:

    • -a | --all - search the whole blocks and return all of the found forks

  3. searchTxInBlockInNode
    Search the node for a block that contains a txHash
    available flags:

    • -t [txHash] - the txHash to search
    • -asc - search from block 1 upwards (defaults to last block downwards)

  4. snapshotIntervals
    Take snapshots for all intervals that does not have a snapshot yet

  5. recalcAddressesAssetsCurState
    Recalculates and updates the database with the current state of all addresses and assets.
    Use this script when there is a miss-calculation in these tables or when wanting to reset the database to a certain block number
    Updates data in the following database tables:

    1. Addresses
    2. AddressTxs
    3. Assets
    4. AssetTxs