From 89a3a9ddfa247a4c0d57aaa184db5141d35a471c Mon Sep 17 00:00:00 2001
From: Shannon Appelcline <shannon.appelcline@gmail.com>
Date: Tue, 8 Sep 2020 09:26:12 -1000
Subject: [PATCH] Create 17_4_sendtx.py

---
 src/17_4_sendtx.py | 69 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 src/17_4_sendtx.py

diff --git a/src/17_4_sendtx.py b/src/17_4_sendtx.py
new file mode 100644
index 0000000..de47e54
--- /dev/null
+++ b/src/17_4_sendtx.py
@@ -0,0 +1,69 @@
+from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException
+from pprint import pprint
+import logging
+
+#logging.basicConfig()
+#logging.getLogger("BitcoinRPC").setLevel(logging.DEBUG)
+# rpc_user and rpc_password are set in the bitcoin.conf file
+rpc_user = "StandUp"
+rpc_pass = "6305f1b2dbb3bc5a16cd0f4aac7e1eba"
+rpc_host = "127.0.0.1"
+rpc_client = AuthServiceProxy(f"http://{rpc_user}:{rpc_pass}@{rpc_host}:18332", timeout=120)
+
+print("Creating a Transaction")
+
+## 0. Create New Addresses
+
+new_address = rpc_client.getnewaddress("Learning-Bitcoin-from-the-Command-Line")
+new_change_address = rpc_client.getrawchangeaddress()
+
+## 1. Select UTXO
+
+utxos = rpc_client.listunspent()
+selected_utxo = utxos[0]  # we select the first utxo here
+utxo_address = selected_utxo['address']
+utxo_txid = selected_utxo['txid']
+utxo_vout = selected_utxo['vout']
+utxo_amt = float(selected_utxo['amount'])
+# here we are sending bitcoins to an address generated by us in our own wallet.
+recipient_address = new_address
+recipient_amt = utxo_amt / 2  # sending half coins to recipient
+miner_fee = 0.00000300        # choose appropriate fee based on your tx size
+change_address = new_change_address
+change_amt = float('%.8f'%((utxo_amt - recipient_amt) - miner_fee))
+print("---------------------------------------------------------------")
+print("Transaction Details:")
+print("-------------------")
+print("UTXO Address.......: ", utxo_address)
+print("UTXO Txid..........: ", utxo_txid)
+print("Vector ID of Output: ", utxo_vout)
+print("UTXO Amount........: ", utxo_amt)
+print("Tx Amount..........: ", recipient_amt)
+print("Recipient Address..: ", recipient_address)
+print("Change Address.....: ", change_address)
+print("Miner Fee..........: ", miner_fee)
+print("Change Amount......: ", change_amt)
+print("---------------------------------------------------------------\n")
+
+## 2. Create Raw Transaction
+txids_vouts = [{"txid": utxo_txid, "vout": utxo_vout}]
+addresses_amts = {f"{recipient_address}": recipient_amt, f"{change_address}": change_amt}
+unsigned_tx_hex = rpc_client.createrawtransaction(txids_vouts, addresses_amts)
+print("---------------------------------------------------------------")
+print("Unsigned Transaction Hex: ", unsigned_tx_hex)
+print("---------------------------------------------------------------\n")
+
+## 3. Sign Raw Transaction
+address_priv_key = []  # list of priv keys of each utxo
+address_priv_key.append(rpc_client.dumpprivkey(utxo_address))
+signed_tx = rpc_client.signrawtransactionwithkey(unsigned_tx_hex, address_priv_key)
+print("---------------------------------------------------------------")
+print("Signed Transaction: ")
+print("----------------------")
+pprint(signed_tx)
+print("---------------------------------------------------------------\n")
+
+## 4. Broadcast Transaction
+send_tx = rpc_client.sendrawtransaction(signed_tx['hex'])
+print("---------------------------------------------------------------")
+print("TXID of sent transaction: ", send_tx)