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Improve readability of segwit.py
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Suhas Daftuar
parent
21833f9456
commit
b9f34e84be
@ -102,7 +102,7 @@ def test_segwit_bumpfee_succeeds(rbf_node, dest_address):
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segwit_out = rbf_node.validateaddress(rbf_node.getnewaddress())
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rbf_node.addwitnessaddress(segwit_out["address"])
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segwitid = send_to_witness(
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version=0,
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use_p2wsh=False,
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node=rbf_node,
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utxo=segwit_in,
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pubkey=segwit_out["pubkey"],
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@ -6,11 +6,11 @@
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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from test_framework.mininode import sha256, ripemd160, CTransaction, CTxIn, COutPoint, CTxOut
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from test_framework.mininode import sha256, ripemd160, CTransaction, CTxIn, COutPoint, CTxOut, COIN
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from test_framework.address import script_to_p2sh, key_to_p2pkh
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from test_framework.script import CScript, OP_HASH160, OP_CHECKSIG, OP_0, hash160, OP_EQUAL, OP_DUP, OP_EQUALVERIFY, OP_1, OP_2, OP_CHECKMULTISIG
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from test_framework.script import CScript, OP_HASH160, OP_CHECKSIG, OP_0, hash160, OP_EQUAL, OP_DUP, OP_EQUALVERIFY, OP_1, OP_2, OP_CHECKMULTISIG, hash160
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from io import BytesIO
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from test_framework.mininode import FromHex
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from test_framework.mininode import FromHex, ToHex
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NODE_0 = 0
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NODE_1 = 1
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@ -18,47 +18,49 @@ NODE_2 = 2
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WIT_V0 = 0
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WIT_V1 = 1
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def witness_script(version, pubkey):
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if (version == 0):
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pubkeyhash = bytes_to_hex_str(ripemd160(sha256(hex_str_to_bytes(pubkey))))
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pkscript = "0014" + pubkeyhash
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elif (version == 1):
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# 1-of-1 multisig
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scripthash = bytes_to_hex_str(sha256(hex_str_to_bytes("5121" + pubkey + "51ae")))
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pkscript = "0020" + scripthash
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# Create a scriptPubKey corresponding to either a P2WPKH output for the
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# given pubkey, or a P2WSH output of a 1-of-1 multisig for the given
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# pubkey. Returns the hex encoding of the scriptPubKey.
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def witness_script(use_p2wsh, pubkey):
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if (use_p2wsh == False):
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# P2WPKH instead
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pubkeyhash = hash160(hex_str_to_bytes(pubkey))
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pkscript = CScript([OP_0, pubkeyhash])
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else:
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assert("Wrong version" == "0 or 1")
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return pkscript
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# 1-of-1 multisig
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witness_program = CScript([OP_1, hex_str_to_bytes(pubkey), OP_1, OP_CHECKMULTISIG])
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scripthash = sha256(witness_program)
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pkscript = CScript([OP_0, scripthash])
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return bytes_to_hex_str(pkscript)
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def addlength(script):
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scriptlen = format(len(script)//2, 'x')
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assert(len(scriptlen) == 2)
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return scriptlen + script
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def create_witnessprogram(version, node, utxo, pubkey, encode_p2sh, amount):
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pkscript = witness_script(version, pubkey)
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# Return a transaction (in hex) that spends the given utxo to a segwit output,
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# optionally wrapping the segwit output using P2SH.
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def create_witnessprogram(use_p2wsh, utxo, pubkey, encode_p2sh, amount):
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pkscript = hex_str_to_bytes(witness_script(use_p2wsh, pubkey))
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if (encode_p2sh):
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p2sh_hash = bytes_to_hex_str(ripemd160(sha256(hex_str_to_bytes(pkscript))))
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pkscript = "a914"+p2sh_hash+"87"
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inputs = []
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outputs = {}
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inputs.append({ "txid" : utxo["txid"], "vout" : utxo["vout"]} )
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DUMMY_P2SH = "2MySexEGVzZpRgNQ1JdjdP5bRETznm3roQ2" # P2SH of "OP_1 OP_DROP"
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outputs[DUMMY_P2SH] = amount
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tx_to_witness = node.createrawtransaction(inputs,outputs)
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#replace dummy output with our own
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tx_to_witness = tx_to_witness[0:110] + addlength(pkscript) + tx_to_witness[-8:]
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return tx_to_witness
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p2sh_hash = hash160(pkscript)
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pkscript = CScript([OP_HASH160, p2sh_hash, OP_EQUAL])
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tx = CTransaction()
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tx.vin.append(CTxIn(COutPoint(int(utxo["txid"], 16), utxo["vout"]), b""))
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tx.vout.append(CTxOut(int(amount*COIN), pkscript))
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return ToHex(tx)
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def send_to_witness(version, node, utxo, pubkey, encode_p2sh, amount, sign=True, insert_redeem_script=""):
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tx_to_witness = create_witnessprogram(version, node, utxo, pubkey, encode_p2sh, amount)
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# Create a transaction spending a given utxo to a segwit output corresponding
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# to the given pubkey: use_p2wsh determines whether to use P2WPKH or P2WSH;
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# encode_p2sh determines whether to wrap in P2SH.
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# sign=True will have the given node sign the transaction.
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# insert_redeem_script will be added to the scriptSig, if given.
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def send_to_witness(use_p2wsh, node, utxo, pubkey, encode_p2sh, amount, sign=True, insert_redeem_script=""):
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tx_to_witness = create_witnessprogram(use_p2wsh, utxo, pubkey, encode_p2sh, amount)
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if (sign):
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signed = node.signrawtransaction(tx_to_witness)
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assert("errors" not in signed or len(["errors"]) == 0)
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return node.sendrawtransaction(signed["hex"])
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else:
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if (insert_redeem_script):
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tx_to_witness = tx_to_witness[0:82] + addlength(insert_redeem_script) + tx_to_witness[84:]
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tx = FromHex(CTransaction(), tx_to_witness)
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tx.vin[0].scriptSig += CScript([hex_str_to_bytes(insert_redeem_script)])
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tx_to_witness = ToHex(tx)
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return node.sendrawtransaction(tx_to_witness)
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@ -180,8 +182,8 @@ class SegWitTest(BitcoinTestFramework):
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V0][0], False)
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V1][0], False)
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# unsigned with redeem script
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V0][0], False, addlength(witness_script(0, self.pubkey[0])))
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V1][0], False, addlength(witness_script(1, self.pubkey[0])))
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V0][0], False, witness_script(False, self.pubkey[0]))
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self.fail_accept(self.nodes[0], p2sh_ids[NODE_0][WIT_V1][0], False, witness_script(True, self.pubkey[0]))
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# signed
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self.fail_accept(self.nodes[0], wit_ids[NODE_0][WIT_V0][0], True)
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self.fail_accept(self.nodes[0], wit_ids[NODE_0][WIT_V1][0], True)
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@ -205,8 +207,8 @@ class SegWitTest(BitcoinTestFramework):
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self.fail_accept(self.nodes[2], p2sh_ids[NODE_2][WIT_V1][1], False)
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self.log.info("Verify unsigned p2sh witness txs with a redeem script in versionbits-settings blocks are valid before the fork")
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self.success_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V0][1], False, addlength(witness_script(0, self.pubkey[2]))) #block 430
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self.success_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V1][1], False, addlength(witness_script(1, self.pubkey[2]))) #block 431
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self.success_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V0][1], False, witness_script(False, self.pubkey[2])) #block 430
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self.success_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V1][1], False, witness_script(True, self.pubkey[2])) #block 431
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self.log.info("Verify previous witness txs skipped for mining can now be mined")
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assert_equal(len(self.nodes[2].getrawmempool()), 4)
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@ -230,8 +232,8 @@ class SegWitTest(BitcoinTestFramework):
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self.log.info("Verify witness txs without witness data are invalid after the fork")
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self.fail_mine(self.nodes[2], wit_ids[NODE_2][WIT_V0][2], False)
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self.fail_mine(self.nodes[2], wit_ids[NODE_2][WIT_V1][2], False)
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self.fail_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V0][2], False, addlength(witness_script(0, self.pubkey[2])))
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self.fail_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V1][2], False, addlength(witness_script(1, self.pubkey[2])))
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self.fail_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V0][2], False, witness_script(False, self.pubkey[2]))
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self.fail_mine(self.nodes[2], p2sh_ids[NODE_2][WIT_V1][2], False, witness_script(True, self.pubkey[2]))
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self.log.info("Verify default node can now use witness txs")
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self.success_mine(self.nodes[0], wit_ids[NODE_0][WIT_V0][0], True) #block 432
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