def create_fund_and_spend_tx():
spendfrom = spendable_outputs.pop()
script = CScript([OP_ADD])
value = spendfrom.vout[0].nValue
# Fund transaction
txfund = create_transaction(spendfrom, 0, b'', value, script)
pad_tx(txfund)
txfund.rehash()
fundings.append(txfund)
# Spend transaction
txspend = CTransaction()
txspend.vout.append(
CTxOut(value-1000, CScript([OP_TRUE])))
txspend.vin.append(
CTxIn(COutPoint(txfund.sha256, 0), b''))
# Sign the transaction
txspend.vin[0].scriptSig = CScript(
b'\x01\x01\x51') # PUSH1(0x01) OP_1
pad_tx(txspend)
txspend.rehash()
return txspend
def make_spend(sigcheckcount):
# Add a funding tx to fundings, and return a tx spending that using
# scriptsig.
logging.debug("Gen tx with {} sigchecks.".format(sigcheckcount))
def get_script_with_sigcheck(count):
return CScript([cds_message, cds_pubkey] +
(count - 1) * [OP_3DUP, OP_CHECKDATASIGVERIFY] +
[OP_CHECKDATASIG])
# get funds locked with OP_1
sourcetx = self.spendable_outputs.popleft()
# make funding that forwards to scriptpubkey
last_sigcheck_count = ((sigcheckcount - 1) % 30) + 1
fundtx = create_transaction(
sourcetx, get_script_with_sigcheck(last_sigcheck_count))
fill_sigcheck_script = get_script_with_sigcheck(30)
remaining_sigcheck = sigcheckcount
while remaining_sigcheck > 30:
fundtx.vout[0].nValue -= 1000
fundtx.vout.append(CTxOut(100, bytes(fill_sigcheck_script)))
remaining_sigcheck -= 30
fundtx.rehash()
fundings.append(fundtx)
# make the spending
scriptsig = CScript([cds_signature])
tx = CTransaction()
tx.vin.append(CTxIn(COutPoint(fundtx.sha256, 1), scriptsig))
input_index = 2
remaining_sigcheck = sigcheckcount
while remaining_sigcheck > 30:
tx.vin.append(
CTxIn(COutPoint(fundtx.sha256, input_index), scriptsig))
remaining_sigcheck -= 30
input_index += 1
tx.vout.append(CTxOut(0, CScript([OP_RETURN])))
pad_tx(tx)
tx.rehash()
return tx
def make_spend(scriptpubkey, scriptsig):
# Add a funding tx to fundings, and return a tx spending that using
# scriptsig.
logging.debug(
"Gen tx with locking script {} unlocking script {} .".format(
scriptpubkey.hex(), scriptsig.hex()))
# get funds locked with OP_1
sourcetx = self.spendable_outputs.popleft()
# make funding that forwards to scriptpubkey
fundtx = create_transaction(sourcetx, scriptpubkey)
fundings.append(fundtx)
# make the spending
tx = CTransaction()
tx.vin.append(CTxIn(COutPoint(fundtx.sha256, 1), scriptsig))
tx.vout.append(CTxOut(0, CScript([OP_RETURN])))
pad_tx(tx)
tx.rehash()
return tx
def create_tx_chain(self, unspent, scriptpubkey, chain_len, num_outputs):
assert (num_outputs > 0)
tx_chain = [unspent]
for i in range(chain_len):
prev_tx = tx_chain[-1]
prev_n = i % num_outputs
amount = prev_tx.vout[prev_n].nValue // num_outputs
tx = create_transaction(prev_tx,
n=prev_n,
value=[amount] * num_outputs,
sig=CScript([OP_TRUE]),
out=scriptpubkey)
pad_tx(tx)
tx_chain.append(tx)
tx_chain.pop(0) # the initial unspent is not part of the chain
return tx_chain
def create_transaction(spendfrom, custom_script, amount=None):
# Fund and sign a transaction to a given output.
# spendfrom should be a CTransaction with first output to OP_TRUE.
# custom output will go on position 1, after position 0 which will be
# OP_TRUE (so it can be reused).
customout = CTxOut(0, bytes(custom_script))
# set output amount to required dust if not given
customout.nValue = amount or (len(customout.serialize()) + 148) * 3
ctx = CTransaction()
ctx.vin.append(CTxIn(COutPoint(spendfrom.sha256, 0), bytes([OP_TRUE])))
ctx.vout.append(CTxOut(0, bytes([OP_TRUE])))
ctx.vout.append(customout)
pad_tx(ctx)
fee = len(ctx.serialize())
ctx.vout[0].nValue = spendfrom.vout[0].nValue - customout.nValue - fee
ctx.rehash()
return ctx
async def test_blockheight_confirmed(self, n, cli, unspent):
# Just unique anyone-can-spend scriptpubkey
scriptpubkey = CScript([OP_TRUE, OP_DROP, OP_NOP])
scripthash = script_to_scripthash(scriptpubkey)
# There should exist any history for scripthash
assert_equal(0, len(await cli.call(GET_HISTORY, scripthash)))
# Send tx to scripthash and confirm it
tx = create_transaction(unspent,
n=0,
value=unspent.vout[0].nValue,
sig=CScript([OP_TRUE]),
out=scriptpubkey)
pad_tx(tx)
self.mine_blocks(n, 1, txns=[tx])
sync_electrum_height(n)
# History should now have 1 entry at current tip height
res = await cli.call(GET_HISTORY, scripthash)
assert_equal(1, len(res))
assert_equal(n.getblockcount(), res[0]['height'])
assert_equal(tx.hash, res[0]['tx_hash'])
async def test_blockheight_unconfirmed(self, n, cli, unspent):
# Another unique anyone-can-spend scriptpubkey
scriptpubkey = CScript([OP_FALSE, OP_DROP, OP_NOP])
scripthash = script_to_scripthash(scriptpubkey)
# There should exist any history for scripthash
assert_equal(0, len(await cli.call(GET_HISTORY, scripthash)))
# Send a chain of three txs. We expect that:
# tx1: height 0, signaling unconfirmed with confirmed parents
# tx2: height -1, signaling unconfirmed with unconfirmed parents
# tx3: height -1, signaling unconfirmed with unconfirmed parents
tx1 = create_transaction(unspent,
n=0,
value=unspent.vout[0].nValue,
sig=CScript([OP_TRUE]),
out=scriptpubkey)
pad_tx(tx1)
big_fee = 1
tx2 = create_transaction(tx1,
n=0,
value=unspent.vout[0].nValue - big_fee,
sig=CScript([OP_TRUE]),
out=scriptpubkey)
pad_tx(tx2)
tx3 = create_transaction(tx2,
n=0,
value=unspent.vout[0].nValue - big_fee,
sig=CScript([OP_TRUE]),
out=scriptpubkey)
pad_tx(tx3)
self.p2p.send_txs_and_test([tx1, tx2, tx3], n)
wait_for_electrum_mempool(n, count=3)
res = await cli.call(GET_HISTORY, scripthash)
assert_equal(3, len(res))
def get_tx(txhash):
for tx in res:
if tx['tx_hash'] == txhash:
return tx
assert (not "tx not in result")
assert_equal(0, get_tx(tx1.hash)['height'])
assert_equal(-1, get_tx(tx2.hash)['height'])
assert_equal(-1, get_tx(tx3.hash)['height'])
# Confirm tx1, see that
# tx1: gets tipheight
# tx2: gets height 0, tx3 keeps height -1
self.mine_blocks(n, 1, [tx1])
sync_electrum_height(n)
res = await cli.call(GET_HISTORY, scripthash)
assert_equal(n.getblockcount(), get_tx(tx1.hash)['height'])
assert_equal(0, get_tx(tx2.hash)['height'])
assert_equal(-1, get_tx(tx3.hash)['height'])
# cleanup mempool for next test
self.mine_blocks(n, 1, [tx2, tx3])
sync_electrum_height(n)
assert (len(n.getrawmempool()) == 0)
def run_test(self):
n = self.nodes[0]
self.bootstrap_p2p()
coinbases = self.mine_blocks(n, 104)
# non-coinbase transactions
prevtx = coinbases[0]
nonstandard_tx = create_transaction(prevtx=prevtx,
value=prevtx.vout[0].nValue,
n=0,
sig=CScript([OP_TRUE]),
out=CScript([OP_FALSE, OP_DROP]))
prevtx = coinbases[1]
p2sh_tx = create_transaction(prevtx=prevtx,
value=prevtx.vout[0].nValue,
n=0,
sig=CScript([OP_TRUE]),
out=CScript(
[OP_HASH160, DUMMY_HASH, OP_EQUAL]))
prevtx = coinbases[2]
p2pkh_tx = create_transaction(prevtx=prevtx,
value=prevtx.vout[0].nValue,
n=0,
sig=CScript([OP_TRUE]),
out=CScript([
OP_DUP, OP_HASH160, DUMMY_HASH,
OP_EQUALVERIFY, OP_CHECKSIG
]))
prevtx = coinbases[3]
unconfirmed_tx = create_transaction(prevtx=prevtx,
value=prevtx.vout[0].nValue,
n=0,
sig=CScript([OP_TRUE]),
out=CScript([
OP_DUP, OP_HASH160, DUMMY_HASH,
OP_EQUALVERIFY, OP_CHECKSIG
]))
for tx in [nonstandard_tx, p2sh_tx, p2pkh_tx, unconfirmed_tx]:
pad_tx(tx)
coinbases.extend(
self.mine_blocks(n, 1, [nonstandard_tx, p2sh_tx, p2pkh_tx]))
self.sync_height()
n.sendrawtransaction(ToHex(unconfirmed_tx))
self.wait_for_mempool_count(count=1)
async def async_tests(loop):
cli = ElectrumConnection(loop)
await cli.connect()
return await asyncio.gather(
self.test_verbose(n, cli, nonstandard_tx.hash, p2sh_tx.hash,
p2pkh_tx.hash, unconfirmed_tx.hash),
self.test_non_verbose(cli, coinbases, unconfirmed_tx))
loop = asyncio.get_event_loop()
loop.run_until_complete(async_tests(loop))