Watching Events

dave123124 · August 2015

I have some Events setup in my solidity contract.

And I am watching them using:


myContract.MyEventName().watch(function(error, result){
	console.log(JSON.stringify(result.args));
});

However the problem is that when you initially load the javascript it is outputting every Event that has ever occurred. I only want to receive notice of Events that occur after the watch is loaded.

So start watching and receive a notice every time MyEventName() event is triggered after that. Without receiving X number of notices for every time that MyEventName() has ever been run before.

dave123124 · August 2015

A solution is to find the latest block at the time of load, and then compare each event to make sure it was in a newer block, example:


var block = web3.eth.getBlock('latest').number;
contract.TheEventName().watch(function(error, result){
			if(result.blockNumber > block){
				// Do something with the event
			}
		});

ConradJohnson · November 2015

@dave123124 - Do you have a simple solidity contract example that this would work with?

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