add broadcast tx route

blockExplorerApi/handler.go

@@ -10,6 +10,9 @@ import (
 
 	"github.com/ethereum/go-ethereum/shyftdb"
 	"github.com/gorilla/mux"
+	"bytes"
+	"io/ioutil"
+	"encoding/json"
 )
 
 // GetTransaction gets txs
@@ -244,3 +247,41 @@ func GetInternalTransactionsHash(w http.ResponseWriter, r *http.Request) {
 
 	fmt.Fprintln(w, "Get Internal Transaction Hash", transactionHash)
 }
+
+func BroadcastTx(w http.ResponseWriter, r *http.Request) {
+	// Example return result (returns tx hash):
+	// {"jsonrpc":"2.0","id":1,"result":"0xafa4c62f29dbf16bbfac4eea7cbd001a9aa95c59974043a17f863172f8208029"}
+
+	// http params
+	vars := mux.Vars(r)
+	transactionHash := vars["transaction_hash"]
+
+	// format the transactionHash into a proper sendRawTransaction jsonrpc request
+	formatted_json := []byte(fmt.Sprintf(`{"jsonrpc":"2.0","method":"eth_sendRawTransaction","params":["%s"],"id":0}`, transactionHash))
+
+	// send json rpc request
+	resp, _ := http.Post("http://localhost:8545", "application/json", bytes.NewBuffer(formatted_json))
+	body, _ := ioutil.ReadAll(resp.Body)
+	byt := []byte(string(body))
+
+	// read json and return result as http response, be it an error or tx hash
+	var dat map[string]interface{}
+	if err := json.Unmarshal(byt, &dat); err != nil {
+		w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, "ERROR parsing json")
+	}
+	tx_hash := dat["result"]
+	if(tx_hash == nil) {
+		errObj := dat["error"]
+		errObj2 := errObj.(map[string]interface{})
+		fmt.Println()
+		w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, "ERROR:", errObj2["message"])
+	} else {
+		w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+		w.WriteHeader(http.StatusOK)
+		fmt.Fprintln(w, "Transaction Hash:", tx_hash)
+	}
+}

blockExplorerApi/routes.go

@@ -87,4 +87,10 @@ var routes = Routes{
 		"/api/get_internal_transactions_hash/{transactions_hash}",
 		GetInternalTransactionsHash,
 	},
+	Route{
+		"BroadcastTx",
+		"GET",
+		"/api/broadcast_tx/{transaction_hash}",
+		BroadcastTx,
+	},
 }