Network.Ethereum.Contract.Event

Ethereum contract event support.

Documentation

data EventAction

Event callback control response

Constructors

ContinueEvent

Continue to listen events

TerminateEvent

Terminate event listener

Instances

Eq EventAction

Methods

(==) :: EventAction -> EventAction -> Bool

(/=) :: EventAction -> EventAction -> Bool

Show EventAction

Methods

showsPrec :: Int -> EventAction -> ShowS

show :: EventAction -> String

showList :: [EventAction] -> ShowS

event :: DecodeEvent i ni e => Filter e -> (e -> ReaderT Change Web3 EventAction) -> Web3 (Async ())

Run 'event\'' one block at a time.

event' :: DecodeEvent i ni e => Filter e -> (e -> ReaderT Change Web3 EventAction) -> Web3 ()

Same as event, but does not immediately spawn a new thread.

eventMany' :: DecodeEvent i ni e => Filter e -> Integer -> (e -> ReaderT Change Web3 EventAction) -> Web3 ()

'eventMany\'' take s a filter, a window size, and a handler.

It runs the handler over the results of eventLogs results using reduceEventStream. If no TerminateEvent action is thrown and the toBlock is not yet reached, it then transitions to polling.