taproot – spending P2TR script path output utilizing python bitcoinutils library

I’m presently making an attempt to spend a P2TR output utilizing one of many scripts used to create the tackle. Under is the python code I attempted to assemble uncooked transaction in an effort to spend the UTXO. The tackle I’m making an attempt to maneuver testnet cash from is tb1pnnr3jysdew9gma9ac9k3pzdy5xp69fka3jh9vkga5ak28yjak0ws3hw834.

from bitcoinlib import transactions
from bitcoinutils.setup import setup
from bitcoinutils.script import Script
from bitcoinutils.utils import *
from bitcoinutils.transactions import Transaction, TxInput, TxOutput, TxWitnessInput
from bitcoinutils.keys import *

utxos = [{'txid': "4390635a95c7e3538dda7c4690f38fbfaa5d93eaf04e1f4f63fb811a884428e2", "vout": 0}]

priv1 = PrivateKey(wif="secret for apparent purpose 1")
priv2 = PrivateKey(wif="secret for apparent purpose 2")
priv3 = PrivateKey(wif="secret for apparent purpose 3")
priv4 = PrivateKey(wif="secret for apparent purpose 4")

pub1 = priv1.get_public_key()
pub2 = priv2.get_public_key()
pub3 = priv3.get_public_key()
pub4 = priv4.get_public_key()

def essential():
    setup("testnet")

    input_amounts = [79800]
    output_amounts = [79650]

    # taproot script 2 is a straightforward P2PK with key 2
    tr_script_p2pk2 = Script([pub2.to_x_only_hex(), "OP_CHECKSIG"])

    # taproot script 3 is a straightforward P2PK with key 3
    tr_script_p2pk3 = Script([pub3.to_x_only_hex(), "OP_CHECKSIG"])

    # taproot script 4 is a straightforward P2PK with key 4
    tr_script_p2pk4 = Script([pub4.to_x_only_hex(), "OP_CHECKSIG"])

    all_leafs = [[tr_script_p2pk2, tr_script_p2pk3], tr_script_p2pk4]
    input_address = pub1.get_taproot_address(all_leafs)

    input_1 = TxInput(txid=utxos[4]['txid'], txout_index=utxos[4]['vout'])

    output_address = P2pkhAddress(tackle="moHfMJHAP3LE2aYTp4Q6g5GxnnfTK9muAJ")
    output_1 = TxOutput(quantity=output_amounts[0], script_pubkey=output_address.to_script_pub_key())

    tx1 = Transaction(inputs=[input_1], outputs=[output_1], has_segwit=True)
    sig1 = priv3.sign_taproot_input(tx=tx1, txin_index=0, utxo_scripts=[input_address.to_script_pub_key()],
                                    quantities=input_amounts, script_path=True, 
                                    tapleaf_script=tr_script_p2pk3, tweak=False)

    # tagged hashes of leafs
    leaf2 = tapleaf_tagged_hash(tr_script_p2pk2)
    leaf3 = tapleaf_tagged_hash(tr_script_p2pk3)
    leaf4 = tapleaf_tagged_hash(tr_script_p2pk4)

    # If utilizing get_tag_hashed_merkle_root
    merkleroot1 = get_tag_hashed_merkle_root(scripts=all_leafs)

    # If manually developing the tree
    branch_23 = tapbranch_tagged_hash(leaf2, leaf3)
    merkleroot2 = tapbranch_tagged_hash(branch_23, leaf4)
    assert(merkleroot1.hex() == merkleroot2.hex())

    control_block = ControlBlock(pubkey=pub1, script_to_spend=tr_script_p2pk3, scripts=leaf2+leaf4)
    tx1.witnesses.append(TxWitnessInput([sig1, tr_script_p2pk3.to_hex(), control_block.to_hex()]))
    print("nRaw signed transaction:n" + tx1.serialize())

Among the many three scripts used to create the tackle, I’m making an attempt to spend the UTXO utilizing the tr_script_p2pk3. The uncooked transaction I obtained from executing this code is the next.

02000000 => model
0001 => marker and flag
01 => enter depend
e22844881a81fb634f1f4ef0ea935daabf8ff390467cda8d53e3c7955a639043 => enter txid
00000000 => enter vout
00 => scriptSig
ffffffff => nSequence
01 => output depend
2237010000000000 => output quantity
1976a914553d745f650e2faba231590931c3561e3ab7cb7888ac => scriptPubKey
03 => witness stack depend
4060f3d6d5e5782977b53d6f7025ff8c7f70e1cb6a1b1de96117aa499713fcd701fed99f27d0922e58a8a8d731af9f3f9b36d5389e694b23513dd0b0eea6264fa7 => schnorr signature
222030a1dfffabb677eb2d8aa45bc7e24cbc31d67731680fe5be4b524e3359445f37ac => tr_script_p2pk3
61 => management block size
c0 => default leaf model tapscript
cded16e0e749cb161694b20f5bd7737ebc22b40805a415941b3fcc26df30dbb1 => inside key (on this instance, pub1)
dff122122208c96d11efdd99a987150f7c422eeb2f9076f40804382dbc95c7b78cbca50495d9c133a60cf93e502e84b421b5640258f549c2bdb6e538eae16e7d => Merkle path (on this case, leaf2 + leaf4)
00000000 => nLocktime

The transaction failed and I obtained the next message: <sendrawtransaction RPC error: {“code”:-26,”message”:”non-mandatory-script-verify-flag (Witness program hash mismatch)”}> I attempted the identical code however with an tackle with two taproot script paths and the transaction was efficiently broadcasted. In that case, the Merkle path simply should be the tapleaf tagged hash of the opposite script that wasn’t getting used to unlock the UTXO. I consider the error has one thing to do with the management block half however I do not know precisely the place my code went fallacious. Can any person level out the issue?