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