package shhext import ( "context" "errors" "fmt" "time" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" whisper "github.com/ethereum/go-ethereum/whisper/whisperv6" "github.com/status-im/status-go/services" ) var ( postSyncTimeout = 60 * time.Second errEnvelopeExpired = errors.New("envelope expired before being sent") errNoShhextAttachedAPI = errors.New("No shhext attached") ) // DebugAPI represents a set of APIs from the `web3.debug` namespace. type DebugAPI struct { s *Service } // NewDebugAPI creates an instance of the debug API. func NewDebugAPI(s *Service) *DebugAPI { return &DebugAPI{s: s} } // PostSync sends an envelope through shhext_post and waits until it's sent. func (api *DebugAPI) PostSync(ctx context.Context, req whisper.NewMessage) (hash hexutil.Bytes, err error) { shhAPI := services.APIByNamespace(api.s.APIs(), "shhext") if shhAPI == nil { err = errNoShhextAttachedAPI return } s, ok := shhAPI.(*PublicAPI) if !ok { err = errNoShhextAttachedAPI return } hash, err = s.Post(ctx, req) if err != nil { return } ctxTimeout, cancel := context.WithTimeout(ctx, postSyncTimeout) defer cancel() err = api.waitForHash(ctxTimeout, hash) return } // waitForHash waits for a specific hash to be sent func (api *DebugAPI) waitForHash(ctx context.Context, hash hexutil.Bytes) error { h := common.BytesToHash(hash) events := make(chan whisper.EnvelopeEvent, 100) sub := api.s.w.SubscribeEnvelopeEvents(events) defer sub.Unsubscribe() for { select { case ev := <-events: if ev.Hash == h { if ev.Event == whisper.EventEnvelopeSent { return nil } if ev.Event == whisper.EventEnvelopeExpired { return errEnvelopeExpired } } case <-ctx.Done(): return fmt.Errorf("wait for hash canceled: %v", ctx.Err()) } } }