[tests] move witness util functions to blocktools.py

This avoids importing from segwit.py to bumpfee.py

1 files changed, 66 insertions, 1 deletions

diff --git a/test/functional/test_framework/blocktools.py b/test/functional/test_framework/blocktools.py
index 5dcf516dc6..3b4f17bc35 100644
--- a/test/functional/test_framework/blocktools.py
+++ b/test/functional/test_framework/blocktools.py
@@ -4,8 +4,27 @@
 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 """Utilities for manipulating blocks and transactions."""
 
+from .address import (
+    key_to_p2sh_p2wpkh,
+    key_to_p2sh_p2wpkh,
+    key_to_p2wpkh,
+    script_to_p2sh_p2wsh,
+    script_to_p2wsh,
+)
 from .mininode import *
-from .script import CScript, OP_TRUE, OP_CHECKSIG, OP_RETURN
+from .script import (
+    CScript,
+    OP_0,
+    OP_1,
+    OP_CHECKMULTISIG,
+    OP_CHECKSIG,
+    OP_EQUAL,
+    OP_HASH160,
+    OP_RETURN,
+    OP_TRUE,
+    hash160,
+)
+from .util import assert_equal
 
 # Create a block (with regtest difficulty)
 def create_block(hashprev, coinbase, nTime=None):
@@ -108,3 +127,49 @@ def get_legacy_sigopcount_tx(tx, fAccurate=True):
         # scriptSig might be of type bytes, so convert to CScript for the moment
         count += CScript(j.scriptSig).GetSigOpCount(fAccurate)
     return count
+
+# Create a scriptPubKey corresponding to either a P2WPKH output for the
+# given pubkey, or a P2WSH output of a 1-of-1 multisig for the given
+# pubkey. Returns the hex encoding of the scriptPubKey.
+def witness_script(use_p2wsh, pubkey):
+    if (use_p2wsh == False):
+        # P2WPKH instead
+        pubkeyhash = hash160(hex_str_to_bytes(pubkey))
+        pkscript = CScript([OP_0, pubkeyhash])
+    else:
+        # 1-of-1 multisig
+        witness_program = CScript([OP_1, hex_str_to_bytes(pubkey), OP_1, OP_CHECKMULTISIG])
+        scripthash = sha256(witness_program)
+        pkscript = CScript([OP_0, scripthash])
+    return bytes_to_hex_str(pkscript)
+
+# Return a transaction (in hex) that spends the given utxo to a segwit output,
+# optionally wrapping the segwit output using P2SH.
+def create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount):
+    if use_p2wsh:
+        program = CScript([OP_1, hex_str_to_bytes(pubkey), OP_1, OP_CHECKMULTISIG])
+        addr = script_to_p2sh_p2wsh(program) if encode_p2sh else script_to_p2wsh(program)
+    else:
+        addr = key_to_p2sh_p2wpkh(pubkey) if encode_p2sh else key_to_p2wpkh(pubkey)
+    if not encode_p2sh:
+        assert_equal(node.validateaddress(addr)['scriptPubKey'], witness_script(use_p2wsh, pubkey))
+    return node.createrawtransaction([utxo], {addr: amount})
+
+# Create a transaction spending a given utxo to a segwit output corresponding
+# to the given pubkey: use_p2wsh determines whether to use P2WPKH or P2WSH;
+# encode_p2sh determines whether to wrap in P2SH.
+# sign=True will have the given node sign the transaction.
+# insert_redeem_script will be added to the scriptSig, if given.
+def send_to_witness(use_p2wsh, node, utxo, pubkey, encode_p2sh, amount, sign=True, insert_redeem_script=""):
+    tx_to_witness = create_witness_tx(node, use_p2wsh, utxo, pubkey, encode_p2sh, amount)
+    if (sign):
+        signed = node.signrawtransaction(tx_to_witness)
+        assert("errors" not in signed or len(["errors"]) == 0)
+        return node.sendrawtransaction(signed["hex"])
+    else:
+        if (insert_redeem_script):
+            tx = FromHex(CTransaction(), tx_to_witness)
+            tx.vin[0].scriptSig += CScript([hex_str_to_bytes(insert_redeem_script)])
+            tx_to_witness = ToHex(tx)
+
+    return node.sendrawtransaction(tx_to_witness)