// /**
//  * Pricecaster Service.
//  *
//  * Fetcher backend component.
//  *
//  * (c) 2021 Randlabs, Inc.
//  */

// import { IPriceFetcher } from './IPriceFetcher'
// import { IStrategy } from '../strategy/strategy'
// import { getPythProgramKeyForCluster, PriceData, Product, PythConnection } from '@pythnetwork/client'
// import { Cluster, clusterApiUrl, Connection } from '@solana/web3.js'
// import { PriceTicker } from '../common/priceTicker'
// import { getEmitterAddressEth, getSignedVAA } from '@certusone/wormhole-sdk'

// export class WormholePythPriceFetcher implements IPriceFetcher {
//    private strategy: IStrategy
//    private symbol: string
//    private pythConnection: PythConnection

//    constructor (symbol: string, strategy: IStrategy, solanaClusterName: string) {
//      const SOLANA_CLUSTER_NAME: Cluster = solanaClusterName as Cluster
//      const connection = new Connection(clusterApiUrl(SOLANA_CLUSTER_NAME))
//      const pythPublicKey = getPythProgramKeyForCluster(SOLANA_CLUSTER_NAME)
//      this.pythConnection = new PythConnection(connection, pythPublicKey)
//      this.strategy = strategy
//      this.symbol = symbol
//    }

//    async start () {
//      await this.pythConnection.start()
//      this.pythConnection.onPriceChange((product: Product, price: PriceData) => {
//        if (product.symbol === this.symbol) {
//          this.onPriceChange(price)
//        }
//      })
//    }

//    stop (): void {
//      this.pythConnection.stop()
//    }

//    setStrategy (s: IStrategy) {
//      this.strategy = s
//    }

//    hasData (): boolean {
//      return this.strategy.bufferCount() > 0
//    }

//    queryTicker (): PriceTicker | undefined {
//      getEmitterAddressEth()
    
//      await getSignedVAA("https://wormhole-v2-testnet-api.certus.one", )
//      //return this.strategy.getPrice()
//    }

//    private onPriceChange (price: PriceData) {
//     GrpcWebImpl
//     PublicRPCServiceClientImpl
//      getSignedVAA()
//      const pt: PriceTicker = new PriceTicker(price.priceComponent,
//        price.confidenceComponent, price.exponent, price.publishSlot)
//      this.strategy.put(pt)
//    }
// }