diff options
Diffstat (limited to 'test/functional/test_framework/script_util.py')
| -rwxr-xr-x | test/functional/test_framework/script_util.py | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/test/functional/test_framework/script_util.py b/test/functional/test_framework/script_util.py index b114002145..39dcb418b7 100755 --- a/test/functional/test_framework/script_util.py +++ b/test/functional/test_framework/script_util.py @@ -13,12 +13,13 @@ from test_framework.script import ( OP_EQUAL, OP_EQUALVERIFY, OP_HASH160, + OP_RETURN, hash160, sha256, ) # To prevent a "tx-size-small" policy rule error, a transaction has to have a -# non-witness size of at least 82 bytes (MIN_STANDARD_TX_NONWITNESS_SIZE in +# non-witness size of at least 65 bytes (MIN_STANDARD_TX_NONWITNESS_SIZE in # src/policy/policy.h). Considering a Tx with the smallest possible single # input (blank, empty scriptSig), and with an output omitting the scriptPubKey, # we get to a minimum size of 60 bytes: @@ -28,15 +29,15 @@ from test_framework.script import ( # Output: 8 [Amount] + 1 [scriptPubKeyLen] = 9 bytes # # Hence, the scriptPubKey of the single output has to have a size of at -# least 22 bytes, which corresponds to the size of a P2WPKH scriptPubKey. -# The following script constant consists of a single push of 21 bytes of 'a': -# <PUSH_21> <21-bytes of 'a'> -# resulting in a 22-byte size. It should be used whenever (small) fake -# scriptPubKeys are needed, to guarantee that the minimum transaction size is -# met. -DUMMY_P2WPKH_SCRIPT = CScript([b'a' * 21]) -DUMMY_2_P2WPKH_SCRIPT = CScript([b'b' * 21]) - +# least 5 bytes. +MIN_STANDARD_TX_NONWITNESS_SIZE = 65 +MIN_PADDING = MIN_STANDARD_TX_NONWITNESS_SIZE - 10 - 41 - 9 +assert MIN_PADDING == 5 + +# This script cannot be spent, allowing dust output values under +# standardness checks +DUMMY_MIN_OP_RETURN_SCRIPT = CScript([OP_RETURN] + ([OP_0] * (MIN_PADDING - 1))) +assert len(DUMMY_MIN_OP_RETURN_SCRIPT) == MIN_PADDING def key_to_p2pk_script(key): key = check_key(key) |