// broadcastTx tries to send the transaction using an api that will broadcast
// a submitted transaction on behalf of the user.
func broadcastTx(tx *btcwire.MsgTx) {
buf := bytes.NewBuffer(make([]byte, 0, tx.SerializeSize()))
tx.Serialize(buf)
hexstr := hex.EncodeToString(buf.Bytes())
url := "https://insight.bitpay.com/api/tx/send"
contentType := "application/json"
sendTxJson := &sendTxJson{RawTx: hexstr}
j, err := json.Marshal(sendTxJson)
if err != nil {
log.Fatal(fmt.Errorf("Broadcasting the tx failed: %v", err))
}
buf = bytes.NewBuffer(j)
resp, err := http.Post(url, contentType, buf)
if err != nil {
log.Fatal(fmt.Errorf("Broadcasting the tx failed: %v", err))
}
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatal(err)
}
fmt.Printf("The sending api responded with:\n%s\n", b)
}
// dumpHex dumps the raw bytes of a Bitcoin transaction to stdout. This is the
// format that Bitcoin wire's protocol accepts, so you could connect to a node,
// send them these bytes, and if the tx was valid, the node would forward the
// tx through the network.
func dumpHex(tx *btcwire.MsgTx) {
buf := bytes.NewBuffer(make([]byte, 0, tx.SerializeSize()))
tx.Serialize(buf)
hexstr := hex.EncodeToString(buf.Bytes())
fmt.Println("Here is your raw bitcoin transaction:")
fmt.Println(hexstr)
}