update go-events.md

[andreipope]

update go-events.md

[gakonst]

So far so good, can we additionally add some golang and js examples of polling and watching events?

[pathornteng]

I just create a new method GetContractEvents in go-loom. It is not done yet. But once it is merged, the following is the example of how to query and decode events

type MyEvent struct {
	Owner  string
	Method string
	Addr   []byte
}

rpcClient := client.NewDAppChainRPCClient("default", "http://plasma.dappchains.com:80/rpc", "http://plasma.dappchains.com:80/query")
fromBlock := uint64(5216300)
toBlock := uint64(5216320)
result, err := rpcClient.GetContractEvents(fromBlock, toBlock, "")
if err != nil {
	panic(err)
}
for _, event := range result.Events {
	var decodedEvent MyEvent
	if err := json.Unmarshal(event.EncodedBody, &decodedEvent); err != nil {
		panic(err)
	}
}

[pathornteng]

Ref PR: loomnetwork/go-loom#383

[gakonst]

Good work so far! It'd be better if you could include a full code snippet that compiles, so change the example to:

package main

import (
	"encoding/json"
	"github.com/loomnetwork/go-loom/client"
)

type MyEvent struct {
	Owner  string
	Method string
	Addr   []byte
}

func main() {
	rpcClient := client.NewDAppChainRPCClient("default", "http://plasma.dappchains.com:80/rpc", "http://plasma.dappchains.com:80/query")
	fromBlock := uint64(5216300)
	toBlock := uint64(5216320)
	result, err := rpcClient.GetContractEvents(fromBlock, toBlock, "")
	if err != nil {
		panic(err)

	}
	for _, event := range result.Events {
		var decodedEvent MyEvent
		if err := json.Unmarshal(event.EncodedBody, &decodedEvent); err != nil {
			panic(err)

		}

	}
}

2 things:

• Can we somehow filter for events that only come from a specific contract?
• Your example also panics, so may want to give an example which provides some more intuitive result.

[gakonst]

Change as per above comment

[andreipope]

Change as per above comment

Updated the example.
@pathornteng can you help with these:

1. Can we somehow filter for events that only come from a specific contract?
2. Your example also panics, so may want to give an example which provides some more intuitive result.

[andreipope]

@pathornteng Could you help?

[mattkanwisher]

Not super high priority but when we get a chance lets see if we can fix this