def conditions_for_solution(
puzzle_reveal: Program,
solution: Program,
) -> Tuple[Optional[Err], Optional[List[ConditionVarPair]], uint64]:
# get the standard script for a puzzle hash and feed in the solution
try:
cost, r = puzzle_reveal.run_with_cost(solution)
error, result = parse_sexp_to_conditions(r)
return error, result, uint64(cost)
except Program.EvalError:
return Err.SEXP_ERROR, None, uint64(0)
def conditions_dict_for_solution(
puzzle_reveal: Program,
solution: Program,
) -> Tuple[Optional[Err], Optional[Dict[ConditionOpcode,
List[ConditionVarPair]]], uint64]:
error, result, cost = conditions_for_solution(puzzle_reveal, solution)
if error or result is None:
return error, None, uint64(0)
return None, conditions_by_opcode(result), cost
def calculate_cost_of_program(program: SerializedProgram,
clvm_cost_ratio_constant: int,
strict_mode: bool = False) -> CostResult:
"""
This function calculates the total cost of either a block or a spendbundle
"""
total_clvm_cost = 0
error, npc_list, cost = get_name_puzzle_conditions(program, strict_mode)
if error:
raise Exception("get_name_puzzle_conditions raised error:" +
str(error))
total_clvm_cost += cost
# Add cost of conditions
npc: NPC
total_vbyte_cost = 0
for npc in npc_list:
for condition, cvp_list in npc.condition_dict.items():
if condition is ConditionOpcode.AGG_SIG or condition is ConditionOpcode.AGG_SIG_ME:
total_vbyte_cost += len(cvp_list) * ConditionCost.AGG_SIG.value
elif condition is ConditionOpcode.CREATE_COIN:
total_vbyte_cost += len(
cvp_list) * ConditionCost.CREATE_COIN.value
elif condition is ConditionOpcode.ASSERT_SECONDS_NOW_EXCEEDS:
total_vbyte_cost += len(
cvp_list) * ConditionCost.ASSERT_SECONDS_NOW_EXCEEDS.value
elif condition is ConditionOpcode.ASSERT_HEIGHT_AGE_EXCEEDS:
total_vbyte_cost += len(
cvp_list) * ConditionCost.ASSERT_HEIGHT_AGE_EXCEEDS.value
elif condition is ConditionOpcode.ASSERT_HEIGHT_NOW_EXCEEDS:
total_vbyte_cost += len(
cvp_list) * ConditionCost.ASSERT_HEIGHT_NOW_EXCEEDS.value
elif condition is ConditionOpcode.ASSERT_MY_COIN_ID:
total_vbyte_cost += len(
cvp_list) * ConditionCost.ASSERT_MY_COIN_ID.value
elif condition is ConditionOpcode.RESERVE_FEE:
total_vbyte_cost += len(
cvp_list) * ConditionCost.RESERVE_FEE.value
elif condition is ConditionOpcode.CREATE_ANNOUNCEMENT:
total_vbyte_cost += len(
cvp_list) * ConditionCost.CREATE_ANNOUNCEMENT.value
elif condition is ConditionOpcode.ASSERT_ANNOUNCEMENT:
total_vbyte_cost += len(
cvp_list) * ConditionCost.ASSERT_ANNOUNCEMENT.value
else:
# We ignore unknown conditions in order to allow for future soft forks
pass
# Add raw size of the program
total_vbyte_cost += len(bytes(program))
total_clvm_cost += total_vbyte_cost * clvm_cost_ratio_constant
return CostResult(error, npc_list, uint64(total_clvm_cost))
def mempool_assert_relative_time_exceeds(condition: ConditionVarPair, unspent: CoinRecord):
"""
Check if the current time in millis exceeds the time specified by condition
"""
try:
expected_mili_time = int_from_bytes(condition.vars[0])
except ValueError:
return Err.INVALID_CONDITION
current_time = uint64(int(time.time() * 1000))
if current_time <= expected_mili_time + unspent.timestamp:
return Err.ASSERT_SECONDS_NOW_EXCEEDS_FAILED
return None
def get_name_puzzle_conditions(block_program: SerializedProgram, safe_mode: bool):
# TODO: allow generator mod to take something (future)
# TODO: write more tests
block_program_args = SerializedProgram.from_bytes(b"\x80")
try:
if safe_mode:
cost, result = GENERATOR_MOD.run_safe_with_cost(block_program, block_program_args)
else:
cost, result = GENERATOR_MOD.run_with_cost(block_program, block_program_args)
npc_list = []
opcodes = set(item.value for item in ConditionOpcode)
for res in result.as_iter():
conditions_list = []
name = std_hash(
bytes(
res.first().first().as_atom()
+ res.first().rest().first().as_atom()
+ res.first().rest().rest().first().as_atom()
)
)
puzzle_hash = bytes32(res.first().rest().first().as_atom())
for cond in res.rest().first().as_iter():
if cond.first().as_atom() in opcodes:
opcode = ConditionOpcode(cond.first().as_atom())
elif not safe_mode:
opcode = ConditionOpcode.UNKNOWN
else:
return "Unknown operator in safe mode.", None, None
if len(list(cond.as_iter())) > 1:
cond_var_list = []
for cond_1 in cond.rest().as_iter():
cond_var_list.append(cond_1.as_atom())
cvl = ConditionVarPair(opcode, cond_var_list)
else:
cvl = ConditionVarPair(opcode, [])
conditions_list.append(cvl)
conditions_dict = conditions_by_opcode(conditions_list)
if conditions_dict is None:
conditions_dict = {}
npc_list.append(NPC(name, puzzle_hash, [(a, b) for a, b in conditions_dict.items()]))
return None, npc_list, uint64(cost)
except Exception:
tb = traceback.format_exc()
return tb, None, None
def calculate_pool_reward(height: uint32) -> uint64:
"""
Returns the pool reward at a certain block height. The pool earns 7/8 of the reward in each block. If the farmer
is solo farming, they act as the pool, and therefore earn the entire block reward.
These halving events will not be hit at the exact times
(3 years, etc), due to fluctuations in difficulty. They will likely come early, if the network space and VDF
rates increase continuously.
"""
if height == 0:
return uint64(int((7 / 8) * 21000000 * _mojo_per_chia))
elif height < 3 * _blocks_per_year:
return uint64(int((7 / 8) * 2 * _mojo_per_chia))
elif height < 6 * _blocks_per_year:
return uint64(int((7 / 8) * 1 * _mojo_per_chia))
elif height < 9 * _blocks_per_year:
return uint64(int((7 / 8) * 0.5 * _mojo_per_chia))
elif height < 12 * _blocks_per_year:
return uint64(int((7 / 8) * 0.25 * _mojo_per_chia))
else:
return uint64(int((7 / 8) * 0.125 * _mojo_per_chia))
def calculate_base_farmer_reward(height: uint32) -> uint64:
"""
Returns the base farmer reward at a certain block height.
The base fee reward is 1/8 of total block reward
Returns the coinbase reward at a certain block height. These halving events will not be hit at the exact times
(3 years, etc), due to fluctuations in difficulty. They will likely come early, if the network space and VDF
rates increase continuously.
"""
if height == 0:
return uint64(int((1 / 8) * 21000000 * _mojo_per_chia))
elif height < 3 * _blocks_per_year:
return uint64(int((1 / 8) * 2 * _mojo_per_chia))
elif height < 6 * _blocks_per_year:
return uint64(int((1 / 8) * 1 * _mojo_per_chia))
elif height < 9 * _blocks_per_year:
return uint64(int((1 / 8) * 0.5 * _mojo_per_chia))
elif height < 12 * _blocks_per_year:
return uint64(int((1 / 8) * 0.25 * _mojo_per_chia))
else:
return uint64(int((1 / 8) * 0.125 * _mojo_per_chia))
def float_to_timestamp(time: float) -> uint64:
return uint64(int(time))
# Used as the initial cc rc challenges, as well as first block back pointers, and first SES back pointer
# We override this value based on the chain being run (testnet0, testnet1, mainnet, etc)
"GENESIS_CHALLENGE": bytes32([0x00] * 32),
"GENESIS_PRE_FARM_POOL_PUZZLE_HASH": bytes.fromhex(
"bc4fd6c394fe90c6097afbfa6ab5927743e2210ecf689dad477be8eb408745d5"
),
"GENESIS_PRE_FARM_FARMER_PUZZLE_HASH": bytes.fromhex(
"4ad98e66a019f11b60a8279514d13105b65588865e2a8e794b5b73d5646174f6"
),
"MAX_VDF_WITNESS_SIZE": 64,
# Target tx count per sec
"TX_PER_SEC": 20,
# Size of mempool = 10x the size of block
"MEMPOOL_BLOCK_BUFFER": 10,
# Max coin amount, fits into 64 bits
"MAX_COIN_AMOUNT": uint64((1 << 64) - 1),
# Targeting twice bitcoin's block size of 1.3MB per block
# Raw size per block target = 1,300,000 * 600 / 47 = approx 100 KB
# Rax TX (single in, single out) = 219 bytes (not compressed)
# TX = 457 vBytes
# floor(100 * 1024 / 219) * 457 = 213684 (size in vBytes)
# Max block cost in virtual bytes
"MAX_BLOCK_COST": 213684,
# MAX block cost in clvm cost units = MAX_BLOCK_COST * CLVM_COST_RATIO_CONSTANT
# 1 vByte = 108 clvm cost units
"CLVM_COST_RATIO_CONSTANT": 108,
# Max block cost in clvm cost units (MAX_BLOCK_COST * CLVM_COST_RATIO_CONSTANT)
# "MAX_BLOCK_COST_CLVM": 23077872,
"MAX_BLOCK_COST_CLVM": 40000000, # Based on arvid analysis
"WEIGHT_PROOF_THRESHOLD": 2,
"BLOCKS_CACHE_SIZE": 4608 + (128 * 4),
def from_bytes(cls, blob):
parent_coin_info = blob[:32]
puzzle_hash = blob[32:64]
amount = int_from_bytes(blob[64:])
return Coin(parent_coin_info, puzzle_hash, uint64(amount))
def validate_spendbundle(
new_spend: SpendBundle,
mempool_removals: List[Coin],
current_coin_records: List[CoinRecord],
block_height: uint32,
validate_signature=True
) -> Tuple[Optional[uint64], MempoolInclusionStatus, Optional[Err]]:
spend_name = new_spend.name()
cost_result = CostResult.from_bytes(validate_transaction(bytes(new_spend)))
npc_list = cost_result.npc_list
cost = cost_result.cost
if cost > DEFAULT_CONSTANTS.MAX_BLOCK_COST_CLVM:
return None, MempoolInclusionStatus.FAILED, Err.BLOCK_COST_EXCEEDS_MAX
if cost_result.error is not None:
return None, MempoolInclusionStatus.FAILED, Err(cost_result.error)
removal_names: List[bytes32] = new_spend.removal_names()
additions = additions_for_npc(npc_list)
additions_dict: Dict[bytes32, Coin] = {}
for add in additions:
additions_dict[add.name()] = add
addition_amount = uint64(0)
# Check additions for max coin amount
for coin in additions:
if coin.amount > DEFAULT_CONSTANTS.MAX_COIN_AMOUNT:
return (
None,
MempoolInclusionStatus.FAILED,
Err.COIN_AMOUNT_EXCEEDS_MAXIMUM,
)
addition_amount = uint64(addition_amount + coin.amount)
# Check for duplicate outputs
addition_counter = collections.Counter(_.name() for _ in additions)
for k, v in addition_counter.items():
if v > 1:
return None, MempoolInclusionStatus.FAILED, Err.DUPLICATE_OUTPUT
# Check for duplicate inputs
removal_counter = collections.Counter(name for name in removal_names)
for k, v in removal_counter.items():
if v > 1:
return None, MempoolInclusionStatus.FAILED, Err.DOUBLE_SPEND
removal_record_dict: Dict[bytes32, CoinRecord] = {}
removal_coin_dict: Dict[bytes32, Coin] = {}
unknown_unspent_error: bool = False
removal_amount = uint64(0)
for name in removal_names:
removal_record = list(
filter(lambda e: e.coin.name() == name, current_coin_records))
if len(removal_record) == 0:
removal_record = None
else:
removal_record = removal_record[0]
if removal_record is None and name not in additions_dict:
unknown_unspent_error = True
break
elif name in additions_dict:
removal_coin = additions_dict[name]
# TODO(straya): what timestamp to use here?
removal_record = CoinRecord(
removal_coin,
uint32(self.peak.height +
1), # In mempool, so will be included in next height
uint32(0),
False,
False,
uint64(int(time.time())),
)
assert removal_record is not None
removal_amount = uint64(removal_amount + removal_record.coin.amount)
removal_record_dict[name] = removal_record
removal_coin_dict[name] = removal_record.coin
if unknown_unspent_error:
return None, MempoolInclusionStatus.FAILED, Err.UNKNOWN_UNSPENT
if addition_amount > removal_amount:
return None, MempoolInclusionStatus.FAILED, Err.MINTING_COIN
fees = removal_amount - addition_amount
assert_fee_sum: uint64 = uint64(0)
for npc in npc_list:
if ConditionOpcode.RESERVE_FEE in npc.condition_dict:
fee_list: List[ConditionVarPair] = npc.condition_dict[
ConditionOpcode.RESERVE_FEE]
for cvp in fee_list:
fee = int_from_bytes(cvp.vars[0])
assert_fee_sum = assert_fee_sum + fee
if fees < assert_fee_sum:
return (
None,
MempoolInclusionStatus.FAILED,
Err.RESERVE_FEE_CONDITION_FAILED,
)
if cost == 0:
return None, MempoolInclusionStatus.FAILED, Err.UNKNOWN
# Use this information later when constructing a block
fail_reason, conflicts = check_removals(mempool_removals,
removal_record_dict)
# If there is a mempool conflict check if this spendbundle has a higher fee per cost than all others
tmp_error: Optional[Err] = None
conflicting_pool_items: Dict[bytes32, Coin] = {}
if fail_reason is Err.MEMPOOL_CONFLICT:
for conflicting in conflicts:
# sb: Coin = mempool_removals[conflicting.name()]
conflicting_pool_items[conflicting.name()] = conflicting
# for item in conflicting_pool_items.values():
# if item.fee_per_cost >= fees_per_cost:
# self.add_to_potential_tx_set(new_spend, spend_name, cost_result)
print("The following items conflict with current mempool items: " +
conflicting_pool_items)
print(
"This fails in the simulation, but the bigger fee_per_cost likely wins on the network"
)
return (
uint64(cost),
MempoolInclusionStatus.FAILED,
Err.MEMPOOL_CONFLICT,
)
elif fail_reason:
return None, MempoolInclusionStatus.FAILED, fail_reason
if tmp_error:
return None, MempoolInclusionStatus.FAILED, tmp_error
# Verify conditions, create hash_key list for aggsig check
pks: List[G1Element] = []
msgs: List[bytes32] = []
error: Optional[Err] = None
for npc in npc_list:
coin_record: CoinRecord = removal_record_dict[npc.coin_name]
# Check that the revealed removal puzzles actually match the puzzle hash
if npc.puzzle_hash != coin_record.coin.puzzle_hash:
return None, MempoolInclusionStatus.FAILED, Err.WRONG_PUZZLE_HASH
chialisp_height = block_height - 1
error = mempool_check_conditions_dict(coin_record, new_spend,
npc.condition_dict,
uint32(chialisp_height))
if error:
if error is Err.ASSERT_HEIGHT_NOW_EXCEEDS_FAILED or error is Err.ASSERT_HEIGHT_AGE_EXCEEDS_FAILED:
return uint64(cost), MempoolInclusionStatus.PENDING, error
break
if validate_signature:
for pk, message in pkm_pairs_for_conditions_dict(
npc.condition_dict, npc.coin_name):
pks.append(pk)
msgs.append(message)
if error:
return None, MempoolInclusionStatus.FAILED, error
if validate_signature:
# Verify aggregated signature
if not AugSchemeMPL.aggregate_verify(pks, msgs,
new_spend.aggregated_signature):
return None, MempoolInclusionStatus.FAILED, Err.BAD_AGGREGATE_SIGNATURE
removals: List[Coin] = [coin for coin in removal_coin_dict.values()]
# new_item = MempoolItem(new_spend, uint64(fees), cost_result, spend_name, additions, removals)
# self.mempool.add_to_pool(new_item, additions, removal_coin_dict)
# log.info(f"add_spendbundle took {time.time() - start_time} seconds")
return uint64(cost), MempoolInclusionStatus.SUCCESS, None