status-im/status-go

package rpcfilters

import (
    "github.com/ethereum/go-ethereum/node"
    "github.com/ethereum/go-ethereum/p2p"
    "github.com/ethereum/go-ethereum/rpc"
    "github.com/status-im/status-go/common"
)

// Make sure that Service implements node.Lifecycle interface.
var _ node.Lifecycle = (*Service)(nil)

// Service represents out own implementation of personal sign operations.
type Service struct {
    latestBlockChangedEvent        *latestBlockChangedEvent
    transactionSentToUpstreamEvent *transactionSentToUpstreamEvent
    rpc                            rpcProvider

    quit chan struct{}
}

// New returns a new Service.
func New(rpc rpcProvider) *Service {
    provider := &latestBlockProviderRPC{rpc}
    latestBlockChangedEvent := newLatestBlockChangedEvent(provider)
    transactionSentToUpstreamEvent := newTransactionSentToUpstreamEvent()
    return &Service{
        latestBlockChangedEvent:        latestBlockChangedEvent,
        transactionSentToUpstreamEvent: transactionSentToUpstreamEvent,

        rpc: rpc,
    }
}

// Protocols returns a new protocols list. In this case, there are none.
func (s *Service) Protocols() []p2p.Protocol {
    return []p2p.Protocol{}
}

// APIs returns a list of new APIs.
func (s *Service) APIs() []rpc.API {
    return []rpc.API{
        {
            Namespace: "eth",
            Version:   "1.0",
            Service:   NewPublicAPI(s),
            Public:    true,
        },
    }
}

// Start is run when a service is started.
func (s *Service) Start() error {
    s.quit = make(chan struct{})
    err := s.transactionSentToUpstreamEvent.Start()
    if err != nil {
        return err
    }
    return s.latestBlockChangedEvent.Start()
}

// Stop is run when a service is stopped.
func (s *Service) Stop() error {
    close(s.quit)
    s.transactionSentToUpstreamEvent.Stop()
    s.latestBlockChangedEvent.Stop()
    return nil
}

func (s *Service) TransactionSentToUpstreamEvent() ChainEvent {
    return s.transactionSentToUpstreamEvent
}

func (s *Service) TriggerTransactionSentToUpstreamEvent(txInfo *PendingTxInfo) {
    defer common.LogOnPanic()
    s.transactionSentToUpstreamEvent.Trigger(txInfo)
}