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events.go
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events.go
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package core
import (
"github.com/tendermint/go-rpc/types"
ctypes "github.com/tendermint/tendermint/rpc/core/types"
"github.com/tendermint/tendermint/types"
)
func Subscribe(wsCtx rpctypes.WSRPCContext, event string) (*ctypes.ResultSubscribe, error) {
log.Notice("Subscribe to event", "remote", wsCtx.GetRemoteAddr(), "event", event)
types.AddListenerForEvent(wsCtx.GetEventSwitch(), wsCtx.GetRemoteAddr(), event, func(msg types.TMEventData) {
// NOTE: EventSwitch callbacks must be nonblocking
// NOTE: RPCResponses of subscribed events have id suffix "#event"
tmResult := ctypes.TMResult(&ctypes.ResultEvent{event, msg})
wsCtx.TryWriteRPCResponse(rpctypes.NewRPCResponse(wsCtx.Request.ID+"#event", &tmResult, ""))
})
return &ctypes.ResultSubscribe{}, nil
}
func Unsubscribe(wsCtx rpctypes.WSRPCContext, event string) (*ctypes.ResultUnsubscribe, error) {
log.Notice("Unsubscribe to event", "remote", wsCtx.GetRemoteAddr(), "event", event)
wsCtx.GetEventSwitch().RemoveListenerForEvent(event, wsCtx.GetRemoteAddr())
return &ctypes.ResultUnsubscribe{}, nil
}