import { BaseError , ExchangeError , NetworkError , DDoSProtection , RequestTimeout , ExchangeNotAvailable } from 'ccxt' ; interface RecoverRetry { recover : boolean ; retry : boolean ; } export class ExchangeErrorHandler { public catch ( e ) { console . error ( e ) ; const { recover , retry } = e instanceof BaseError ? this . handleBaseError ( e ) : this . handleError ( e ) ; if ( ! recover ) process . exit ( ) ; return retry ; } private handleError ( e ) { return { recover : true , retry : false } ; } private handleBaseError ( e ) { if ( e instanceof ExchangeError ) throw e ; return this . handleNetworkError ( e ) ; } private handleNetworkError ( e ) { if ( e instanceof DDoSProtection ) return this . handleDDoSProtection ( e ) ; if ( e instanceof RequestTimeout ) return this . handleRequestTimeout ( e ) ; if ( e instanceof ExchangeNotAvailable ) return this . handleExchangeNotAvailable ( e ) ; return this . handleError ( e ) ; } private handleDDoSProtection ( e ) { return { recover : true , retry : true } ; } private handleRequestTimeout ( e ) { return { recover : true , retry : true } ; } private handleExchangeNotAvailable ( e ) { return { recover : true , retry : true } ; } }