Getting a pool instance with the data fetched

Usually before work begins, the preparation includes the following steps:
  1. 1.
    Using mainnet data to initialize a core pool
  2. 2.
    Replaying events up to the specified block
SimulatorClient(clientInstance.initCorePoolFromMainnet and clientInstance.recoverFromMainnetEventDBFile) is designed to do that. See Fetching all the data of a certain pool from Ethereum.
If you have tried MainnetDataDownloader to download or update event logs(See Uniswap-v3-Events-Downloader), then you are supposed to get the pool instance in this way:
// the database name containing downloaded-and-pre-processed mainnet events
let mainnetEventDBFilePath =
let simulationDataManager: SimulationDataManager =
await SQLiteSimulationDataManager.buildInstance(
"Your file path to save the internal data"
let clientInstance: SimulatorClient = new SimulatorClient(
// Specify an endBlock number
// the SimulatorClient will replay events up to that block
let endBlock = 12374077;
let configurableCorePool: ConfigurableCorePool =
await clientInstance.recoverFromMainnetEventDBFile(
// Now you can do whatever you want with the simulated pool
// here we simply print out the square root price of the pool at the specified block height