def addLiquidity(w3, account, router_proxy, current_rate):
max_tokens = get_token_balance(w3, account, WIZ_TOKEN)
approve(w3, account, router_proxy.address, max_tokens.as_wei, WIZ_TOKEN)
deadline = generateDeadline(w3)
eth_amount = EthereumAmount(0.001)
token_amount_desired = TokenAmount(eth_amount.value / current_rate.value, WIZ_TOKEN)
transaction_params = {
"from": account.address,
"value": eth_amount.as_wei,
"gas_price": w3.eth.generateGasPrice(),
"gas": GAS_LIMIT,
}
tx_hash = send_raw_transaction(
w3,
account,
router_proxy.functions.addLiquidityETH,
WIZ_TOKEN.address,
token_amount_desired.as_wei,
int(token_amount_desired.as_wei * 0.8),
int(eth_amount.as_wei * 0.8),
account.address,
deadline,
**transaction_params,
)
wait_for_transaction(w3, tx_hash)
def removeLiquidity(w3, account, router_proxy):
pair_address = to_canonical_address(get_pair_address(w3, router_proxy))
liquidity_token = Erc20Token(
ticker="UNI-V2",
wei_ticker="UNI-V2 WEI",
address=pair_address
)
amount = get_token_balance(w3, account, liquidity_token)
approve(w3, account, router_proxy.address, amount.as_wei, liquidity_token)
min_eth = 1
min_tokens = 1
deadline = generateDeadline(w3)
transaction_params = {
"from": account.address,
"gas_price": w3.eth.generateGasPrice(),
"gas": GAS_LIMIT,
}
tx_hash = send_raw_transaction(
w3,
account,
router_proxy.functions.removeLiquidityETH,
WIZ_TOKEN.address,
amount.as_wei,
min_tokens,
min_eth,
account.address,
deadline,
**transaction_params,
)
wait_for_transaction(w3, tx_hash)
def test_can_mint_tokens(self):
self.network.fund(self.account)
self.account.wait_for_ethereum_funds(self.w3, EthereumAmount(0.01))
tx_hash = mint_tokens(self.w3, self.account, self.svt_token)
wait_for_transaction(self.w3, tx_hash)
balance = get_token_balance(self.w3, self.account, self.svt_token)
self.assertTrue(balance.as_wei >= self.svt_token.supply)
def approve(w3, account, allowed_address, allowance: Wei, token: Erc20Token):
token_proxy = _make_token_proxy(w3=w3, token=token)
old_allowance = token_proxy.functions.allowance(account.address,
allowed_address).call()
if old_allowance > 0:
send_raw_transaction(
w3,
account,
token_proxy.functions.approve,
allowed_address,
0,
gas=GAS_REQUIRED_FOR_APPROVE,
)
tx_hash = send_raw_transaction(
w3,
account,
token_proxy.functions.approve,
allowed_address,
allowance,
gas=GAS_REQUIRED_FOR_APPROVE,
)
wait_for_transaction(w3, tx_hash)
def approve(w3, account, allowed_address, allowance: Wei, token: Erc20Token):
token_proxy = _make_token_proxy(w3=w3, token=token)
old_allowance = token_proxy.functions.allowance(account.address,
allowed_address).call()
nonce = w3.eth.getTransactionCount(account.address)
if old_allowance > 0:
send_raw_transaction(
w3,
account,
token_proxy.functions.approve,
allowed_address,
0,
gas=GAS_REQUIRED_FOR_APPROVE,
nonce=nonce,
)
nonce += 1
transaction_receipt = send_raw_transaction(
w3,
account,
token_proxy.functions.approve,
allowed_address,
allowance,
gas=GAS_REQUIRED_FOR_APPROVE,
nonce=nonce,
)
wait_for_transaction(w3, transaction_receipt)
def test_buy_tokens(funded_account, provide_liquidity, uniswap):
w3 = uniswap.w3
wiz_balance_before = get_token_balance(w3, funded_account, WIZ_TOKEN)
buy_amount = TokenAmount(1, WIZ_TOKEN)
tx_hash = uniswap.buy_tokens(funded_account, buy_amount)
wait_for_transaction(w3, tx_hash)
wiz_balance_after = get_token_balance(w3, funded_account, WIZ_TOKEN)
assert wiz_balance_after == wiz_balance_before + buy_amount
def test_udc_deposit(self):
self.network.fund(self.account)
self.account.wait_for_ethereum_funds(self.w3, EthereumAmount(0.01))
tx_hash = mint_tokens(self.w3, self.account, self.svt_token)
wait_for_transaction(self.w3, tx_hash)
amount = get_token_balance(self.w3, self.account, self.svt_token)
tx_hash = deposit_service_tokens(self.w3, self.account, self.svt_token,
amount.as_wei)
wait_for_transaction(self.w3, tx_hash)
deposited = get_token_deposit(self.w3, self.account, self.svt_token)
self.assertEqual(deposited, amount)
def provide_liquidity(infura, create_account, uniswap):
account = create_account()
w3 = make_web3_provider(infura.url, account)
fund_account(account, w3)
tx_hash = mint_tokens(w3, account, WIZ_TOKEN)
wait_for_transaction(w3, tx_hash)
current_rate = uniswap.get_current_rate(TokenAmount(1000, WIZ_TOKEN))
router_proxy = w3.eth.contract(
abi=uniswap_contracts.UNISWAP_ROUTER02_ABI,
address=Uniswap.ROUTER02_ADDRESS,
)
addLiquidity(w3, account, router_proxy, current_rate)
yield
removeLiquidity(w3, account, router_proxy)
empty_account(w3, account)
def _deposit_to_udc(self, w3, account, service_token, deposit_amount):
self._send_status_update(
f"Making deposit of {deposit_amount.formatted} to the "
"User Deposit Contract")
self._send_status_update(f"This might take a few minutes")
tx_hash = deposit_service_tokens(
w3=w3,
account=account,
token=service_token,
amount=deposit_amount.as_wei,
)
wait_for_transaction(w3, tx_hash)
service_token_deposited = get_token_deposit(w3=w3,
account=account,
token=service_token)
self._send_status_update(
f"Total amount deposited at UDC: {service_token_deposited.formatted}"
)
def _run_track_transaction(self, **kw):
try:
configuration_file_name = kw.get("configuration_file_name")
tx_hash = kw.get("tx_hash")
configuration_file = RaidenConfigurationFile.get_by_filename(
configuration_file_name)
except Exception as exc:
self._send_error_message(str(exc))
return
configuration_file._initial_funding_txhash = tx_hash
configuration_file.save()
account = configuration_file.account
w3 = make_web3_provider(
configuration_file.ethereum_client_rpc_endpoint, account)
self._send_txhash_message(["Waiting for confirmation of transaction"],
tx_hash=tx_hash)
try:
wait_for_transaction(w3, decode_hex(tx_hash))
except TransactionTimeoutError:
self._send_status_update(
[f"Not confirmed after {WEB3_TIMEOUT} seconds!"], icon="error")
self._send_txhash_message(
"Funding took too long! "
"Click the link below and restart the wizard, "
"once it was confirmed:",
tx_hash=tx_hash,
)
time.sleep(10)
sys.exit(1)
else:
configuration_file._initial_funding_txhash = None
configuration_file.save()
self._send_status_update("Transaction confirmed")
service_token = configuration_file.settings.service_token
self._send_redirect(
self.reverse_url("swap", configuration_file.file_name,
service_token.ticker))
def _run_swap(self, **kw):
try:
configuration_file_name = kw.get("configuration_file_name")
exchange_name = kw["exchange"]
token_amount = kw["amount"]
token_ticker = kw["token"]
except (ValueError, KeyError, TypeError) as exc:
self._send_error_message(f"Invalid request: {exc}")
return
try:
configuration_file = RaidenConfigurationFile.get_by_filename(
configuration_file_name)
network_name = configuration_file.network.name
form = TokenExchangeForm({
"network": [network_name],
"exchange": [exchange_name],
"token_amount": [token_amount],
"token_ticker": [token_ticker],
})
if form.validate():
account = configuration_file.account
try_unlock(account)
w3 = make_web3_provider(
configuration_file.ethereum_client_rpc_endpoint, account)
token = Erc20Token.find_by_ticker(form.data["token_ticker"],
network_name)
token_amount = TokenAmount(Wei(form.data["token_amount"]),
token)
exchange = Exchange.get_by_name(form.data["exchange"])(w3=w3)
self._send_status_update(f"Starting swap at {exchange.name}")
costs = exchange.calculate_transaction_costs(
token_amount, account)
needed_funds = costs["total"]
exchange_rate = costs["exchange_rate"]
balance_before_swap = account.get_ethereum_balance(w3)
if needed_funds > balance_before_swap:
raise ValueError((
f"Not enough ETH. {balance_before_swap.formatted} available, but "
f"{needed_funds.formatted} needed"))
self._send_status_update(
(f"Best exchange rate found at {exchange.name}: "
f"{exchange_rate} / {token_amount.ticker}"))
self._send_status_update(
f"Trying to acquire {token_amount} at this rate")
transaction_receipt = exchange.buy_tokens(
account, token_amount, costs)
wait_for_transaction(w3, transaction_receipt)
token_balance = get_token_balance(w3, account, token)
balance_after_swap = account.get_ethereum_balance(w3)
actual_total_costs = balance_before_swap - balance_after_swap
self._send_status_update(
f"Swap complete. {token_balance.formatted} available")
self._send_status_update(f"Actual costs: {actual_total_costs}")
required = RequiredAmounts.for_network(network_name)
service_token = Erc20Token.find_by_ticker(
required.service_token.ticker, network_name)
service_token_balance = get_token_balance(
w3, account, service_token)
total_service_token_balance = get_total_token_owned(
w3, account, service_token)
transfer_token = Erc20Token.find_by_ticker(
required.transfer_token.ticker, network_name)
transfer_token_balance = get_token_balance(
w3, account, transfer_token)
if total_service_token_balance < required.service_token:
raise ExchangeError("Exchange was not successful")
elif service_token_balance.as_wei > 0:
self._send_status_update(
f"Making deposit of {service_token_balance.formatted} to the User Deposit Contract"
)
self._send_status_update(f"This might take a few minutes")
transaction_receipt = deposit_service_tokens(
w3=w3,
account=account,
token=service_token,
amount=service_token_balance.as_wei,
)
wait_for_transaction(w3, transaction_receipt)
service_token_deposited = get_token_deposit(
w3=w3, account=account, token=service_token)
self._send_status_update(
f"Total amount deposited at UDC: {service_token_deposited.formatted}"
)
if transfer_token_balance < required.transfer_token:
redirect_url = self.reverse_url(
"swap", configuration_file.file_name,
transfer_token.ticker)
next_page = "Moving on to exchanging DAI ..."
else:
redirect_url = self.reverse_url(
"launch", configuration_file.file_name)
next_page = "You are ready to launch Raiden! ..."
self._send_summary(
["Congratulations! Swap Successful!", next_page],
icon=token_ticker)
time.sleep(5)
self._send_redirect(redirect_url)
else:
for key, error_list in form.errors.items():
error_message = f"{key}: {'/'.join(error_list)}"
self._send_error_message(error_message)
except (json.decoder.JSONDecodeError, KeyError, ExchangeError,
ValueError) as exc:
self._send_error_message(str(exc))
redirect_url = self.reverse_url("swap",
configuration_file.file_name,
token_ticker)
next_page = f"Try again to exchange {token_ticker}..."
self._send_summary(["Transaction failed",
str(exc), next_page],
icon="error")
time.sleep(5)
self._send_redirect(redirect_url)
def _run_funding(self, **kw):
try:
configuration_file_name = kw.get("configuration_file_name")
configuration_file = RaidenConfigurationFile.get_by_filename(
configuration_file_name)
except Exception as exc:
self._send_error_message(str(exc))
return
network = configuration_file.network
if not network.FAUCET_AVAILABLE:
self._send_error_message(
f"Can not run automatic funding for {network.capitalized_name}"
)
return
account = configuration_file.account
try_unlock(account)
if account.passphrase is None:
self._send_error_message(
"Failed to unlock account! Please reload page")
return
w3 = make_web3_provider(
configuration_file.ethereum_client_rpc_endpoint, account)
self._send_status_update(
f"Obtaining {network.capitalized_name} ETH through faucet")
network.fund(account)
balance = account.wait_for_ethereum_funds(
w3=w3, expected_amount=EthereumAmount(0.01))
self._send_status_update(f"Account funded with {balance.formatted}")
service_token = Erc20Token.find_by_ticker(
self.installer_settings.service_token.ticker,
self.installer_settings.network)
if self.installer_settings.service_token.mintable:
self._send_next_step(
f"Minting {service_token.ticker}",
f"Fund Account with {service_token.ticker}",
3,
)
tx_hash = mint_tokens(w3, account, service_token)
wait_for_transaction(w3, tx_hash)
service_token_balance = get_token_balance(w3, account, service_token)
if service_token_balance.as_wei > 0:
self._deposit_to_udc(w3, account, service_token,
service_token_balance)
if self.installer_settings.transfer_token.mintable:
transfer_token = Erc20Token.find_by_ticker(
self.installer_settings.transfer_token.ticker,
self.installer_settings.network)
self._send_next_step(
f"Minting {transfer_token.ticker}",
f"Fund Account with {transfer_token.ticker}",
4,
)
tx_hash = mint_tokens(w3, account, transfer_token)
wait_for_transaction(w3, tx_hash)
self._send_redirect(self.reverse_url("launch",
configuration_file_name))
def _run_swap(self, **kw):
try:
configuration_file_name = kw.get("configuration_file_name")
exchange_name = kw["exchange"]
token_amount = kw["amount"]
token_ticker = kw["token"]
except (ValueError, KeyError, TypeError) as exc:
self._send_error_message(f"Invalid request: {exc}")
return
try:
configuration_file = RaidenConfigurationFile.get_by_filename(
configuration_file_name)
network_name = configuration_file.network.name
form = TokenExchangeForm({
"network": [network_name],
"exchange": [exchange_name],
"token_amount": [token_amount],
"token_ticker": [token_ticker],
})
if form.validate():
account = configuration_file.account
try_unlock(account)
w3 = make_web3_provider(
configuration_file.ethereum_client_rpc_endpoint, account)
token = Erc20Token.find_by_ticker(form.data["token_ticker"],
network_name)
token_amount = TokenAmount(Wei(form.data["token_amount"]),
token)
exchange = Exchange.get_by_name(form.data["exchange"])(w3=w3)
self._send_status_update(f"Starting swap at {exchange.name}")
costs = exchange.calculate_transaction_costs(
token_amount, account)
needed_funds = costs["total"]
exchange_rate = costs["exchange_rate"]
balance_before_swap = account.get_ethereum_balance(w3)
if needed_funds > balance_before_swap:
raise ValueError((
f"Not enough ETH. {balance_before_swap.formatted} available, but "
f"{needed_funds.formatted} needed"))
self._send_status_update(
(f"Best exchange rate found at {exchange.name}: "
f"{exchange_rate} / {token_amount.ticker}"))
self._send_status_update(
f"Trying to acquire {token_amount} at this rate")
tx_hash = exchange.buy_tokens(account, token_amount, costs)
wait_for_transaction(w3, tx_hash)
token_balance = get_token_balance(w3, account, token)
balance_after_swap = account.get_ethereum_balance(w3)
actual_total_costs = balance_before_swap - balance_after_swap
self._send_status_update(
f"Swap complete. {token_balance.formatted} available")
self._send_status_update(f"Actual costs: {actual_total_costs}")
required = RequiredAmounts.from_settings(
self.installer_settings)
service_token = Erc20Token.find_by_ticker(
required.service_token.ticker, network_name)
service_token_balance = get_token_balance(
w3, account, service_token)
total_service_token_balance = get_total_token_owned(
w3, account, service_token)
transfer_token = Erc20Token.find_by_ticker(
required.transfer_token.ticker, network_name)
transfer_token_balance = get_token_balance(
w3, account, transfer_token)
if total_service_token_balance < required.service_token:
raise ExchangeError("Exchange was not successful")
elif token_ticker == service_token.ticker and service_token_balance > required.service_token:
self._deposit_to_udc(w3, account, service_token,
service_token_balance)
self._redirect_transfer_swap(configuration_file,
transfer_token_balance, required)
else:
for key, error_list in form.errors.items():
error_message = f"{key}: {'/'.join(error_list)}"
self._send_error_message(error_message)
except (json.decoder.JSONDecodeError, KeyError, ExchangeError,
ValueError) as exc:
self._redirect_after_swap_error(exc, configuration_file.file_name,
token_ticker)
