verify fails on p2wpkh

[mrx23dot]

I have created this segwit transaction https://coinb.in/#verify accepts it, but this lib doesn't:

from bitcoinlib.transactions import Transaction

raw_transaction_hex = "010000000001014596DDE147995AE7485EBA2AC365DF99A67AB75F81990E4CC1163471CD5659950000000000FFFFFFFF0175070000000000001976A9146F303D16FC6680F171C087A7D41B6BDF215AEE5E88AC0247304402207F4FFD453D9680F81CCE725AA3C0FE912F4215A3686810883CA26D7880B76CB002200A7F0AAC28E9C20D6621E0F2F9F9FEBD1D5431AF29A156BBBF3F071123BD488D012102F629179B2A08F930EC72D5909B5C4B8A6D18E88FDB473D040ABFA90CC81745AA00000000"

transaction = Transaction.parse(raw_transaction_hex)
print("valid:", transaction.verify())
False

at least it could give reason.

[mrx23dot]

same transaction created with different lib, but verify still fails

020000000001014596dde147995ae7485eba2ac365df99a67ab75f81990e4cc1163471cd5659950000000000ffffffff0175070000000000001976a9146f303d16fc6680f171c087a7d41b6bdf215aee5e88ac024730440220475ef700c502af5c4e2d4bf6776997fb4adb7ff509991415fa42e343b09616220220464d1db3ca6b48f8fe01af37dfeedee629ba4d48d7710bea002a803620d52196012102f629179b2a08f930ec72d5909b5c4b8a6d18e88fdb473d040abfa90cc81745aa00000000

[mccwdev]

The raw transaction does not contain the value of the input, which is needed to verify it. To fix it try:

rawtx = '020000000001014596dde147995ae7485eba2ac365df99a67ab75f81990e4cc1163471cd5659950000000000ffffffff0175070000000000001976a9146f303d16fc6680f171c087a7d41b6bdf215aee5e88ac024730440220475ef700c502af5c4e2d4bf6776997fb4adb7ff509991415fa42e343b09616220220464d1db3ca6b48f8fe01af37dfeedee629ba4d48d7710bea002a803620d52196012102f629179b2a08f930ec72d5909b5c4b8a6d18e88fdb473d040abfa90cc81745aa00000000'
t = Transaction.parse(rawtx)
t.inputs[0].value = 2115
t.verify()
t.info()

[mrx23dot]

I see your point, but this was a valid transaction accepted by the chain https://mempool.space/tx/ce8419aa2a9d29a7965cf44645a535d6f5c37ee28ea933c5f60bfb38ef888826?showFlow=false#flow

raw hex: 020000000001014596dde147995ae7485eba2ac365df99a67ab75f81990e4cc1163471cd5659950000000000ffffffff0175070000000000001976a9146f303d16fc6680f171c087a7d41b6bdf215aee5e88ac024730440220475ef700c502af5c4e2d4bf6776997fb4adb7ff509991415fa42e343b09616220220464d1db3ca6b48f8fe01af37dfeedee629ba4d48d7710bea002a803620d52196012102f629179b2a08f930ec72d5909b5c4b8a6d18e88fdb473d040abfa90cc81745aa00000000

so it must know that the input was: 0.00002115 BTC

and output was: 0.00001909 BTC

Also why does it say that it's not signed?

Inputs

• bc1qjx6rjrcc4vprtmqgm3tt... 0.00000000 BTC 955956cd713416c14c0e99815fb77aa699df65c32aba5e48e75a9947e1dd9645 0 segwit sig_pubkey; sigs: 1 (1-of-1) not validated Outputs
• 1B8unyP6dqLq2k5wn7RH.. 0.00001909 BTC p2pkh U

Or does it need the witness data for these?

[mccwdev]

The witness data is included but the input value is not included in the raw transaction hash, so to verify the transaction any client needs to look at the preceding transactions.