def test_lexical_analyze_divide_single_line_multi_line(self):
# Test divide, single_line_comment, and multi_line_comment
source_code = """var a = 1 / 2
// Hello World
/*
Bye World
*/
"""
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
divide = Token("divide", "", 1)
single_line_comment = Token("single_line_comment", " Hello World", 2)
multi_line_comment = Token(
"multi_line_comment",
"""
Bye World
""",
3,
)
self.assertEqual(tokens[4], divide)
self.assertEqual(tokens[7], single_line_comment)
self.assertEqual(tokens[-4], multi_line_comment)
def get_price(web3, bpool_address, tokenin_address, tokenout_address):
"""Get price at a balancer pool located at address bpool_address.
Price is given as the number of tokenin required to buy a single tokenout."""
if is_pool_empty(web3, bpool_address):
return 0
if not is_token_in_exchange(
Token.from_address(tokenin_address).symbol, bpool_address):
return 0
if not is_token_in_exchange(
Token.from_address(tokenout_address).symbol, bpool_address):
return 0
bpool = web3.eth.contract(address=bpool_address, abi=bpool_abi)
tokenin_decimals = Token().from_address(tokenin_address).decimals
tokenout_decimals = Token().from_address(tokenout_address).decimals
# Get spot price - it represents the ratio of one asset to another in terms of wei
# on both sides. It's the number of wei you'll receive of one asset per wei of the
# other asset. It is represented as an 18-decimal number so we divide that out.
# mathematically: spot_price = num_wei_output_token / one_wei_input_token
spot_price = (
10**-18 *
bpool.functions.getSpotPrice(tokenin_address, tokenout_address).call())
# since spot price is in terms of wei, we multiply out the two tokens decimals
# to get price in 'normal' units
spot_price_converted = spot_price * (10**(tokenout_decimals -
tokenin_decimals))
# print(f"{spot_price_converted} units of {tokenin_address} buys 1 unit of {tokenout_address}")
return spot_price_converted
async def _get_liquidity_and_price_at_pool_addr(self, exchange_address):
"""Get liquidity (in eth, dai, and tokens) and get price of token priced in
eth and dai. Returns a 5-tuple."""
liquidity_eth = 0
liquidity_dai = 0
liquidity_tokens = 0
price_eth = 0
price_dai = 0
for token_address, token_amount in get_reserves(
self._w3, exchange_address):
if token_address.lower() == Token("WETH").address.lower():
liquidity_eth = token_amount
if token_address.lower() == Token("DAI").address.lower():
liquidity_dai = token_amount
if token_address.lower() == self._currency_address.lower():
liquidity_tokens = token_amount
if liquidity_tokens == 0:
# no liquidity; don't bother updating price
pass
else:
price_eth = get_price(self._w3, exchange_address,
Token("WETH").address,
self._currency_address)
price_dai = get_price(self._w3, exchange_address,
Token("DAI").address, self._currency_address)
return liquidity_eth, liquidity_dai, liquidity_tokens, price_eth, price_dai
def check_playable_position(self, number):
if self.dico_sum_position[number] < 8:
self.dico_sum_position[number] += 1
self.player_list[self.current_player()].list_token.append(
Token(int(number), self.dico_sum_position[number]))
Player.total_token.append(
(Token(int(number), self.dico_sum_position[number]),
self.player_list[self.current_player()]))
return True
return False
def getExchangeAddressForTokenPair(first_token_name, second_token_name):
token_addresses = sorted([
Token().from_symbol(first_token_name).address.lower(),
Token().from_symbol(second_token_name).address.lower()
])
for token1_name, token2_name, address in exchanges:
if (token1_name in [first_token_name, second_token_name]
and token2_name in [first_token_name, second_token_name]):
return (address, Token().from_address(token_addresses[0]).symbol,
Token().from_address(token_addresses[1]).symbol)
raise PairNotDefinedError(
f"No pair {first_token_name}-{second_token_name} found")
def get_reserves(web3, token0_name, token1_name):
"""get the reserves, in tokens, of a particular uniswap v2 pool"""
exchange_address, first_token_name, second_token_name = getExchangeAddressForTokenPair(
token0_name, token1_name)
exchange = web3.eth.contract(address=exchange_address, abi=exchange_abi)
reserves = exchange.functions.getReserves().call()
reserves[0] = reserves[0] / 10**Token().from_symbol(
first_token_name).decimals
reserves[1] = reserves[1] / 10**Token().from_symbol(
second_token_name).decimals
if token0_name == second_token_name:
reserves[0], reserves[1] = reserves[1], reserves[0]
return reserves[0], reserves[1]
def __init__(self, currency_symbol):
super().__init__()
try:
# self._exchange_addresses = getExchangeAddressesForToken(currency_symbol)
self._decimals = Token().from_symbol(currency_symbol).decimals
except IndexError:
raise RuntimeError(
"Unknown currency_symbol {}, need to add address to token_class.py"
.format(currency_symbol))
self.currency_symbol = currency_symbol
self.exchange_name = "Uniswap v3"
self.command_names = ["uniswap"]
self.short_url = "https://bit.ly/35nae4n" # main uniswap pre-selected to 0xbtc
self.volume_eth = 0
self.show_yield = True
self.hourly_volume_tokens = [
] # list of volume for each of the last N hours
self._time_volume_last_updated = 0
self._w3 = Web3(Web3.HTTPProvider(ETHEREUM_NODE_URL))
self._uniswap_api = Uniswap(address=None,
private_key=None,
version=3,
web3=self._w3)
async def _update_volume(self):
volume_eth = 0
volume_dai = 0
volume_tokens = 0
for exchange_address in self._exchange_addresses:
pool_volume = get_volume(self._w3, exchange_address, num_hours=24)
for token_address in pool_volume.keys():
if token_address.lower() == Token("WETH").address.lower():
volume_eth += pool_volume[token_address]
if token_address.lower() == Token("DAI").address.lower():
volume_dai += pool_volume[token_address]
elif token_address.lower() == self._currency_address.lower():
volume_tokens += pool_volume[token_address]
self.volume_eth = volume_eth
self.volume_usd = volume_dai
self.volume_tokens = volume_tokens
def __init__(self, currency_symbol):
super().__init__()
try:
self._exchange_addresses = getExchangeAddressesForToken(
currency_symbol)
self._decimals = Token().from_symbol(currency_symbol).decimals
except IndexError:
raise RuntimeError(
"Unknown currency_symbol {}, need to add address to uniswap_v2.py"
.format(currency_symbol))
self.currency_symbol = currency_symbol
self.exchange_name = "Uniswap v2"
self.command_names = ["uniswapv2", "univ2", "uniswap v2", "uni v2"]
self.short_url = "https://bit.ly/3wPyeu5" # main uniswap pre-selected to 0xbtc
self.volume_eth = 0
self.show_yield = True
self.hourly_volume_tokens = [
] # list of volume for each of the last N hours
self._time_volume_last_updated = 0
self._w3 = Web3(Web3.HTTPProvider(ETHEREUM_NODE_URL))
self._exchanges = [
self._w3.eth.contract(address=a, abi=exchange_abi)
for a in self._exchange_addresses
]
class TestTokenClass(unittest.TestCase):
def setUp(self):
self.token = Token("number", 1, 2)
self.other = Token("number", 2, 2)
def test__str__(self):
self.assertEqual(str(self.token), "Token('number', '1', '2')")
def test__eq__(self):
self.assertTrue(self.token != self.other)
def test_token2dig(self):
self.assertEqual(self.token.token2dig("string"), 2)
self.assertEqual(self.token.token2dig("multiply"), 11)
self.assertEqual(self.token.token2dig("assignment"), 8)
self.assertEqual(self.token.token2dig("while"), 22)
self.assertEqual(self.token.token2dig("hello"), 0)
def test_lexical_analyze_assignment_equal(self):
# Test assignment and equal
source_code = "var a = 1 == 1"
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
assignment = Token("assignment", "", 1)
equal = Token("equal", "", 1)
self.assertEqual(tokens[2], assignment)
self.assertEqual(tokens[-2], equal)
def get_volume(web3, bpool_address, num_hours=24):
"""Get total volume in a balancer pool for all tokens in the pool.
Returns a dictionaty like:
{
"token_address": token_volume,
"token_address": token_volume
} """
bpool = web3.eth.contract(address=bpool_address, abi=bpool_abi)
swap_topic = "0x908fb5ee8f16c6bc9bc3690973819f32a4d4b10188134543c88706e0e1d43378"
token_volumes = defaultdict(int)
current_eth_block = web3.eth.blockNumber
for event in web3.eth.getLogs({
'fromBlock':
current_eth_block -
(int(60 * 60 * num_hours / SECONDS_PER_ETH_BLOCK)),
'toBlock':
current_eth_block - 1,
'address':
bpool_address
}):
topic0 = web3.toHex(event['topics'][0])
if topic0 == swap_topic:
#print('swap in tx', web3.toHex(event['transactionHash']))
receipt = web3.eth.getTransactionReceipt(event['transactionHash'])
parsed_logs = bpool.events.LOG_SWAP().processReceipt(receipt)
# one TX may contain multiple logs - so find the correct one
correct_log = None
for log in parsed_logs:
if log.address.lower() == bpool.address.lower():
correct_log = log
if correct_log is None:
logging.warning('bad swap transaction {}'.format(
web3.toHex(event['transactionHash'])))
continue
tokenAmountIn = correct_log.args.tokenAmountIn
tokenAmountOut = correct_log.args.tokenAmountOut
tokenIn = correct_log.args.tokenIn
tokenOut = correct_log.args.tokenOut
#print(f"swap {tokenAmountIn} of {tokenIn} for {tokenAmountOut} of {tokenOut}")
token_volumes[tokenIn] += tokenAmountIn
token_volumes[tokenOut] += tokenAmountOut
continue
else:
# we only care about swaps, so ignore all else
continue
# logging.debug('unknown topic txhash {}'.format(web3.toHex(event['transactionHash'])))
# logging.debug('unknown topic topic0 {}'.format(topic0))
for token_address in token_volumes.keys():
token_volumes[token_address] /= 10**Token().from_address(
token_address).decimals
return token_volumes
def get_reserves(web3, token0_name, token1_name, fee):
"""get the reserves, in tokens, of a particular uniswap v3 pool"""
exchange_address, first_token_name, second_token_name = getExchangeAddressForTokenPair(
token0_name, token1_name, fee)
token0_contract = web3.eth.contract(
address=Token().from_symbol(token0_name).address, abi=erc20_abi)
token0_balance = (
token0_contract.functions.balanceOf(exchange_address).call() /
10**Token().from_symbol(token0_name).decimals)
token1_contract = web3.eth.contract(
address=Token().from_symbol(token1_name).address, abi=erc20_abi)
token1_balance = (
token1_contract.functions.balanceOf(exchange_address).call() /
10**Token().from_symbol(token1_name).decimals)
return token0_balance, token1_balance
def scanTokens(self):
while not self.isAtEnd():
# We are at the beginning of the next lexeme.
self.start = self.current
self.scanToken()
# last token in token list, end of input
self.tokens.append(Token(TokenType.EOF, "", None, self.line))
return self.tokens
def add_spaces(cls, current, spaces, tokens, id, new_lines, res):
if current in spaces:
tokens[id] = Token(u' ')
id += 1
current += 1
current, tokens, id = cls.add_new_lines(current, new_lines, tokens, id, res, spaces)
current, tokens, id = cls.add_r_lines(current, res, tokens, id, spaces, new_lines)
current, tokens, id = cls.add_spaces(current, spaces, tokens, id, new_lines, res)
return current, tokens, id
def test_lexical_analyze_left_right_paren_call_end(self):
# Test left_paren, right_paren, and call_end
source_code = "var a = (1)"
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
left_paren = Token("left_paren", "", 1)
right_paren = Token("right_paren", "", 1)
call_end = Token("call_end", "", 1)
self.assertEqual(tokens[3], left_paren)
self.assertEqual(tokens[5], right_paren)
self.assertEqual(tokens[6], call_end)
def test_lexical_analyze_modulus_equal_modulus(self):
# Test modulus_equal and modulus
source_code = """var a = 1 % 2
a %= 3
"""
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
modulus_equal = Token("modulus_equal", "", 2)
modulus = Token("modulus", "", 1)
self.assertEqual(tokens[8], modulus_equal)
self.assertEqual(tokens[4], modulus)
def __init__(self, currency_symbol):
super().__init__()
self._exchange_addresses = get_exchange_addresses_for_token(
currency_symbol)
if len(self._exchange_addresses) == 0:
raise RuntimeError(
"Unknown currency_symbol {}, need to add address to balancer.py"
.format(currency_symbol))
self._currency_address = Token().from_symbol(currency_symbol).address
self._decimals = Token().from_symbol(currency_symbol).decimals
self.currency_symbol = currency_symbol
self.exchange_name = "Balancer"
self.command_names = ["balancer"]
self.short_url = "https://bit.ly/3mp1qCS" # balancer configured to eth->0xbtc
self._time_volume_last_updated = 0
self._w3 = Web3(Web3.HTTPProvider(ETHEREUM_NODE_URL))
def test_lexical_analyze_multiply_equal_multiply(self):
# Test multiply_equal and multiply
source_code = """var a = 1 * 2
a *= 1
"""
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
multiply_equal = Token("multiply_equal", "", 2)
multiply = Token("multiply", "", 1)
self.assertEqual(tokens[8], multiply_equal)
self.assertEqual(tokens[4], multiply)
async def _get_price_and_liquidity_for_pair(self, token0_address,
token1_address, fee):
paired_token_address = token0_address if token1_address.lower(
) == Token().from_symbol(
self.currency_symbol).address.lower() else token1_address
paired_token_symbol = Token().from_address(paired_token_address).symbol
liquidity_tokens, liquidity_pair = get_reserves(
self._w3, self.currency_symbol, paired_token_symbol, fee)
# bail early if the number of tokens LPd is very small
# TODO: this should probably be configurable. Or generated automatically
# based on some USD value, not token value
if liquidity_tokens < _MINIMUM_ALLOWED_LIQUIDITY_IN_TOKENS:
raise NoLiquidityException(
f"Less than {_MINIMUM_ALLOWED_LIQUIDITY_IN_TOKENS} tokens LP'd for exchange contract."
)
# get price of paired token (in USD) to determine price of
# <self.currency_symbol> in USD. Strategy changes depending on pair
price_in_paired_token = get_price(self._uniswap_api,
paired_token_symbol,
self.currency_symbol, fee)
if paired_token_symbol == "WETH":
paired_token_price_in_usd = self.eth_price_usd
else:
# get the paired token's price in Eth. If there is less than $500 in
# liquidity to determine this, then skip this pair when determining price.
liquidity_eth_of_paired_token, _ = get_reserves(
self._w3, "WETH", paired_token_symbol, _DEFAULT_PAIR_FEE)
if liquidity_eth_of_paired_token < 500 / self.eth_price_usd:
raise NoLiquidityException(
f"Less than {500} USD LP'd for paired token {paired_token_symbol}, pair token price not considered accurate. Skipping pair."
)
else:
paired_token_price_in_eth = get_price(self._uniswap_api,
"WETH",
paired_token_symbol,
_DEFAULT_PAIR_FEE)
paired_token_price_in_usd = paired_token_price_in_eth * self.eth_price_usd
price_in_usd = price_in_paired_token * paired_token_price_in_usd
return price_in_usd, liquidity_tokens
def get_list_of_terms(tokenizedTermList, docId):
token_list = list()
# Loops through all the terms in the document and adds them to the list with their associated docId
for term in tokenizedTermList:
term = normalize(term)
if term != '':
tokenObj = Token(term, docId)
token_list.append(tokenObj)
#To remove duplicates uncomment the following
#term_dict.append(term)
return token_list
def keyword_identifier(source_code, i, table, scanner_obj):
"""
Process keywords and identifiers in source code
Params
======
source_code (str)
: The string containing pulse source code
i (int)
: The current index in the source code
table (SymbolTable)
: Symbol table constructed holding information about identifiers and constants
scanner_obj (Scanner)
: Instance of Scanner class
Returns
=======
(Token)
: The token generated for the keyword or identifier
(int)
: Current position in source code
"""
value = ""
# Loop until we get a non-digit character
while is_alnum(source_code[i]):
value += source_code[i]
i += 1
# Check if value is keyword or not
if is_keyword(value):
return Token(value, "", scanner_obj.line_num), i
# Check if identifier is in symbol table
id = table.get_by_symbol(value)
# If identifier is not in symbol table then give a placeholder datatype var
if id == -1:
id = table.entry(value, "var", "variable")
# Returns the id, token and current index in source code
return Token("id", id, scanner_obj.line_num), i
def numeric_val(source_code, i, table, scanner_obj):
"""
Processes numeric values in the source code
Params
======
source_code (str)
: The string containing simc source code
i (int)
: The current index in the source code
table (SymbolTable)
: Symbol table constructed holding information about identifiers and constants
scanner_obj (Scanner)
: Instance of Scanner class
Returns
=======
(Token)
: The token generated for the numeric constant
(int)
: Current position in source code
"""
numeric_constant = ""
# Loop until we get a non-digit character
while is_digit(source_code[i]):
numeric_constant += source_code[i]
i += 1
# If a numeric constant contains more than 1 decimal point (.) then that is invalid
if numeric_constant.count(".") > 1:
error(
"Invalid numeric constant, cannot have more than one decimal point in a"
" number!",
scanner_obj.line_num,
)
# Check the length after . to distinguish between float and double
length = len(
numeric_constant.split(".")[1]) if "." in numeric_constant else 0
# Determine type of numeric value
type = "int"
if length != 0:
if length <= 7:
type = "float"
elif length >= 7:
type = "double"
# Make entry in symbol table
id = table.entry(numeric_constant, type, "constant")
# Return number token and current index in source code
return Token("number", id, scanner_obj.line_num), i
def test_lexical_analyze_left_right_brace_newline(self):
# Test left_brace, right_brace, and newline
source_code = """if(1 == 1) {
print(1)
}
"""
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
left_brace = Token("left_brace", "", 1)
right_brace = Token("right_brace", "", 3)
newline = Token("newline", "", 1)
self.assertEqual(tokens[7], left_brace)
self.assertEqual(tokens[-2], right_brace)
self.assertEqual(tokens[8], newline)
def test_numeric_val_int(self):
source_code = "3\0"
i = 0
table = SymbolTable()
line_num = 1
token, _ = numeric_val(source_code, i, table, line_num)
other = Token("number", 1, 1)
self.assertEqual(token, other)
self.assertEqual(table.symbol_table, {1: ["3", "int", "constant"]})
def get_price(uniswap_api, token0_name, token1_name, fee):
"""Get the price at a particular uniswap v3 pool, in terms of token0 / token1"""
if token0_name == "ETH":
token0_address = "0x0000000000000000000000000000000000000000"
token0_decimals = 18
else:
token0_address = Token().from_symbol(token0_name).address
token0_decimals = Token().from_symbol(token0_name).decimals
if token1_name == "ETH":
token1_address = "0x0000000000000000000000000000000000000000"
token1_decimals = 18
else:
token1_address = Token().from_symbol(token1_name).address
token1_decimals = Token().from_symbol(token1_name).decimals
price = (uniswap_api.get_price_input(token1_address, token0_address,
1 * 10**token1_decimals, fee) /
10**token0_decimals)
return price
def tokenize(input_text):
nltk.download('stopwords')
stopwords = set(nltk.corpus.stopwords.words('english'))
sentences = split_input_text_into_sentences(input_text)
all_tokens_of_all_sentences = []
for sent_index, sent in enumerate(sentences):
tokens_in_this_sentence = []
for word_index, word in enumerate(sent.split()):
token = Token()
token.original_word = word
token.word_without_punctuations = remove_surrounding_punctuations(
word).lower()
if token.word_without_punctuations in stopwords:
token.is_stopword = True
else:
token.is_stopword = False
tokens_in_this_sentence.append(token)
all_tokens_of_all_sentences.append(tokens_in_this_sentence)
set_parts_of_speech_in_tokens(all_tokens_of_all_sentences)
return all_tokens_of_all_sentences
def test_string_val_char(self):
source_code = '"h"\\0'
i = 0
table = SymbolTable()
line_num = 1
token, _ = string_val(source_code, i, table, line_num)
other = Token("string", 1, 1)
self.assertEqual(token, other)
self.assertEqual(table.symbol_table, {1: ["'h'", "char", "constant"]})
def test_lexical_analyze_less_than_less_than_equal_left_shift(self):
# Test less_than, less_than_equal, left_shift
source_code = """1 < 2
1 <= 2
1 << 2
"""
with open("testing.simc", "w") as file:
file.write(source_code)
table = SymbolTable()
tokens = lexical_analyze("testing.simc", table)
less_than = Token("less_than", "", 1)
less_than_equal = Token("less_than_equal", "", 2)
left_shift = Token("left_shift", "", 3)
self.assertEqual(tokens[1], less_than)
self.assertEqual(tokens[5], less_than_equal)
self.assertEqual(tokens[9], left_shift)
def test_keyword_identifier_keyword(self):
# Test a keyword
source_code = "fun\\0"
i = 0
table = SymbolTable()
line_num = 1
token, _ = keyword_identifier(source_code, i, table, line_num)
other = Token("fun", "", 1)
self.assertEqual(token, other)