Eth JSON-RPC API: make EthLog#Data a string.

api/eth_types.go

@@ -545,8 +545,8 @@ type EthLog struct {
 	// Address is the address of the actor that produced the event log.
 	Address EthAddress `json:"address"`
 
-	// Data is the values of the event log, excluding topics
-	Data []EthHash `json:"data"`
+	// Data is the value of the event log, excluding topics
+	Data EthHash `json:"data"`
 
 	// List of topics associated with the event log.
 	Topics []EthHash `json:"topics"`

api/eth_types_test.go

@@ -176,7 +176,7 @@ func TestEthFilterResultMarshalJSON(t *testing.T) {
 		BlockHash:        hash2,
 		BlockNumber:      53,
 		Topics:           []EthHash{hash1},
-		Data:             []EthHash{hash1},
+		Data:             hash1,
 		Address:          addr,
 	}
 	logjson, err := json.Marshal(log)

node/impl/full/eth.go

@@ -1062,7 +1062,7 @@ func ethFilterResultFromEvents(evs []*filter.CollectedEvent) (*api.EthFilterResu
 			if entry.Key == api.EthTopic1 || entry.Key == api.EthTopic2 || entry.Key == api.EthTopic3 || entry.Key == api.EthTopic4 {
 				log.Topics = append(log.Topics, hash)
 			} else {
-				log.Data = append(log.Data, hash)
+				log.Data = hash
 			}
 		}
 
@@ -1497,7 +1497,7 @@ func newEthTxReceipt(ctx context.Context, tx api.EthTx, lookup *api.MsgLookup, r
 				if entry.Key == api.EthTopic1 || entry.Key == api.EthTopic2 || entry.Key == api.EthTopic3 || entry.Key == api.EthTopic4 {
 					l.Topics = append(l.Topics, hash)
 				} else {
-					l.Data = append(l.Data, hash)
+					l.Data = hash
 				}
 			}