def test_previous_tx_non_existent():
"""
tests transaction update when a previous transaction does
not exist
"""
# make a synthetic previous transaction
num_prev_tx_outputs = secrets.randbelow(5) + 1
previous_tx = make_synthetic_previous_transaction(num_prev_tx_outputs)
#reflect this previous transaction in HeliumDB
ctr = 0
for vout in previous_tx["vout"]:
#pdb.set_trace()
fragment = {}
fragment["pkhash"] = vout["ScriptPubKey"][2]
fragment["spent"] = False
fragment["value"] = max(secrets.randbelow(1000000), 10)
fragment["tx_chain"] = ""
txid = previous_tx["transactionid"] + "_" + str(ctr)
chain.put_transaction( txid, fragment)
ctr += 1
# make a transaction consuming some previous transaction outputs
trx = make_synthetic_transaction(previous_tx)
trx["vin"][0]["txid"] = "bad previous tx id"
#update the Helium Chainstate
assert chain.transaction_update(trx) == False
def test_get_for_fake_key():
"""
attempt to get a key value for a fictitous key
"""
txid = make_transactionid()
vout_index = make_vout_index()
keyvalue = {
"pkhash": make_pkhash(),
"value": make_value(),
"spent": make_spent(),
"tx_chain": ""
}
assert chain.put_transaction(txid + "_" + str(vout_index), keyvalue) == True
key = "junk_" + str(vout_index)
ret = chain.get_transaction(key)
assert ret == False
def test_put_keyvalue():
"""
put a key-value pair into the chainstate database
values have already been validated by validate_transaction
"""
ctr = 0
while ctr < 10:
txid = make_transactionid()
vout_index = make_vout_index()
keyvalue = {
"pkhash": make_pkhash(),
"value": make_value(),
"spent": make_spent(),
"tx_chain": ""
}
assert chain.put_transaction(txid + "_" + str(vout_index), keyvalue) == True
ctr += 1
def test_get_keyvalue():
"""
get a key value for an existing key
"""
txid = make_transactionid()
vout_index = make_vout_index()
keyvalue = {
"pkhash": make_pkhash(),
"value": make_value(),
"spent": make_spent(),
"tx_chain": ""
}
assert chain.put_transaction(txid + "_" + str(vout_index), keyvalue) == True
key = txid + "_" + str(vout_index)
ret = chain.get_transaction(key)
assert ret != False
assert type(ret) == dict