diff options
| -rwxr-xr-x | test/functional/rpc_psbt.py | 17 | ||||
| -rwxr-xr-x | test/functional/test_framework/wallet_util.py | 18 | ||||
| -rwxr-xr-x | test/functional/wallet_send.py | 23 |
3 files changed, 29 insertions, 29 deletions
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py index 016aa3ba11..897cb51b18 100755 --- a/test/functional/rpc_psbt.py +++ b/test/functional/rpc_psbt.py @@ -16,8 +16,6 @@ from test_framework.messages import ( CTxIn, CTxOut, MAX_BIP125_RBF_SEQUENCE, - WITNESS_SCALE_FACTOR, - ser_compact_size, ) from test_framework.psbt import ( PSBT, @@ -42,6 +40,7 @@ from test_framework.util import ( find_vout_for_address, ) from test_framework.wallet_util import ( + calculate_input_weight, generate_keypair, get_generate_key, ) @@ -752,17 +751,9 @@ class PSBTTest(BitcoinTestFramework): input_idx = i break psbt_in = dec["inputs"][input_idx] - # Calculate the input weight - # (prevout + sequence + length of scriptSig + scriptsig) * WITNESS_SCALE_FACTOR + len of num scriptWitness stack items + (length of stack item + stack item) * N stack items - # Note that occasionally this weight estimate may be slightly larger or smaller than the real weight - # as sometimes ECDSA signatures are one byte shorter than expected with a probability of 1/128 - len_scriptsig = len(psbt_in["final_scriptSig"]["hex"]) // 2 if "final_scriptSig" in psbt_in else 0 - len_scriptsig += len(ser_compact_size(len_scriptsig)) - len_scriptwitness = (sum([(len(x) // 2) + len(ser_compact_size(len(x) // 2)) for x in psbt_in["final_scriptwitness"]]) + len(ser_compact_size(len(psbt_in["final_scriptwitness"])))) if "final_scriptwitness" in psbt_in else 0 - len_prevout_txid = 32 - len_prevout_index = 4 - len_sequence = 4 - input_weight = ((len_prevout_txid + len_prevout_index + len_sequence + len_scriptsig) * WITNESS_SCALE_FACTOR) + len_scriptwitness + scriptsig_hex = psbt_in["final_scriptSig"]["hex"] if "final_scriptSig" in psbt_in else "" + witness_stack_hex = psbt_in["final_scriptwitness"] if "final_scriptwitness" in psbt_in else None + input_weight = calculate_input_weight(scriptsig_hex, witness_stack_hex) low_input_weight = input_weight // 2 high_input_weight = input_weight * 2 diff --git a/test/functional/test_framework/wallet_util.py b/test/functional/test_framework/wallet_util.py index 44811918bf..8104701ff3 100755 --- a/test/functional/test_framework/wallet_util.py +++ b/test/functional/test_framework/wallet_util.py @@ -15,6 +15,11 @@ from test_framework.address import ( script_to_p2wsh, ) from test_framework.key import ECKey +from test_framework.messages import ( + CTxIn, + CTxInWitness, + WITNESS_SCALE_FACTOR, +) from test_framework.script_util import ( key_to_p2pkh_script, key_to_p2wpkh_script, @@ -123,6 +128,19 @@ def generate_keypair(compressed=True, wif=False): privkey = bytes_to_wif(privkey.get_bytes(), compressed) return privkey, pubkey +def calculate_input_weight(scriptsig_hex, witness_stack_hex=None): + """Given a scriptSig and a list of witness stack items for an input in hex format, + calculate the total input weight. If the input has no witness data, + `witness_stack_hex` can be set to None.""" + tx_in = CTxIn(scriptSig=bytes.fromhex(scriptsig_hex)) + witness_size = 0 + if witness_stack_hex is not None: + tx_inwit = CTxInWitness() + for witness_item_hex in witness_stack_hex: + tx_inwit.scriptWitness.stack.append(bytes.fromhex(witness_item_hex)) + witness_size = len(tx_inwit.serialize()) + return len(tx_in.serialize()) * WITNESS_SCALE_FACTOR + witness_size + class WalletUnlock(): """ A context manager for unlocking a wallet with a passphrase and automatically locking it afterward. diff --git a/test/functional/wallet_send.py b/test/functional/wallet_send.py index e4ca341b49..0a0a8dba0d 100755 --- a/test/functional/wallet_send.py +++ b/test/functional/wallet_send.py @@ -9,10 +9,6 @@ from itertools import product from test_framework.authproxy import JSONRPCException from test_framework.descriptors import descsum_create -from test_framework.messages import ( - ser_compact_size, - WITNESS_SCALE_FACTOR, -) from test_framework.test_framework import BitcoinTestFramework from test_framework.util import ( assert_equal, @@ -21,7 +17,10 @@ from test_framework.util import ( assert_raises_rpc_error, count_bytes, ) -from test_framework.wallet_util import generate_keypair +from test_framework.wallet_util import ( + calculate_input_weight, + generate_keypair, +) class WalletSendTest(BitcoinTestFramework): @@ -543,17 +542,9 @@ class WalletSendTest(BitcoinTestFramework): input_idx = i break psbt_in = dec["inputs"][input_idx] - # Calculate the input weight - # (prevout + sequence + length of scriptSig + scriptsig) * WITNESS_SCALE_FACTOR + len of num scriptWitness stack items + (length of stack item + stack item) * N stack items - # Note that occasionally this weight estimate may be slightly larger or smaller than the real weight - # as sometimes ECDSA signatures are one byte shorter than expected with a probability of 1/128 - len_scriptsig = len(psbt_in["final_scriptSig"]["hex"]) // 2 if "final_scriptSig" in psbt_in else 0 - len_scriptsig += len(ser_compact_size(len_scriptsig)) - len_scriptwitness = (sum([(len(x) // 2) + len(ser_compact_size(len(x) // 2)) for x in psbt_in["final_scriptwitness"]]) + len(ser_compact_size(len(psbt_in["final_scriptwitness"])))) if "final_scriptwitness" in psbt_in else 0 - len_prevout_txid = 32 - len_prevout_index = 4 - len_sequence = 4 - input_weight = ((len_prevout_txid + len_prevout_index + len_sequence + len_scriptsig) * WITNESS_SCALE_FACTOR) + len_scriptwitness + scriptsig_hex = psbt_in["final_scriptSig"]["hex"] if "final_scriptSig" in psbt_in else "" + witness_stack_hex = psbt_in["final_scriptwitness"] if "final_scriptwitness" in psbt_in else None + input_weight = calculate_input_weight(scriptsig_hex, witness_stack_hex) # Input weight error conditions assert_raises_rpc_error( |