From fc21f62a31ad294e40144129143bd7b628191c4b Mon Sep 17 00:00:00 2001
From: Victor Tran <vu.tran54@gmail.com>
Date: Fri, 19 Oct 2018 02:26:22 +0700
Subject: [PATCH] Add function to find event by log topic (aka. id)

---
 accounts/abi/abi.go | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/accounts/abi/abi.go b/accounts/abi/abi.go
index 535e5d78b2..e1107f6d3b 100644
--- a/accounts/abi/abi.go
+++ b/accounts/abi/abi.go
@@ -147,3 +147,14 @@ func (abi *ABI) MethodById(sigdata []byte) (*Method, error) {
 	}
 	return nil, fmt.Errorf("no method with id: %#x", sigdata[:4])
 }
+
+// EventById looks up an event by the first topic hash
+// returns nil if none was found
+func (abi *ABI) EventById(topic []byte) (*Event, error) {
+	for _, event := range abi.Events {
+		if bytes.Equal(event.Id().Bytes(), topic) {
+			return &event, nil
+		}
+	}
+	return nil, fmt.Errorf("no event with id: %#x", topic)
+}