nucypher.blockchain¶

Subpackages¶

Submodules¶

class BaseEconomics(initial_supply: int, total_supply: int, issuance_decay_coefficient: int, lock_duration_coefficient_1: int, lock_duration_coefficient_2: int, maximum_rewarded_periods: int, first_phase_supply: int, first_phase_max_issuance: int, genesis_hours_per_period: int = 24, hours_per_period: int = 168, minimum_locked_periods: int = 4, minimum_allowed_locked: int = 15000000000000000000000, maximum_allowed_locked: int = 30000000000000000000000000, minimum_worker_periods: int = 2, hash_algorithm: int = 1, base_penalty: int = 2, penalty_history_coefficient: int = 0, percentage_penalty_coefficient: int = 100000, reward_coefficient: int = 2, worklock_supply: int = 225000000000000000000000000, bidding_start_date: int = 1598918400, bidding_end_date: int = 1601337599, cancellation_end_date: int = 1601510399, worklock_boosting_refund_rate: int = 800, worklock_commitment_duration: int = 180, worklock_min_allowed_bid: int = 5000000000000000000)¶

Bases: object

A representation of a contract deployment set’s constructor parameters, and the calculations used to generate those values from high-level human-understandable parameters.

Formula for staking in one period for the second phase: (totalSupply - currentSupply) * (lockedValue / totalLockedValue) * (k1 + allLockedPeriods) / d / k2

d - Coefficient which modifies the rate at which the maximum issuance decays k1 - Numerator of the locking duration coefficient k2 - Denominator of the locking duration coefficient

if allLockedPeriods > maximum_rewarded_periods then allLockedPeriods = maximum_rewarded_periods kappa * log(2) / halving_delay === (k1 + allLockedPeriods) / d

nunits_per_token = 1000000000000000000¶

HASH_ALGORITHM_KECCAK256 = 0¶

HASH_ALGORITHM_SHA256 = 1¶

HASH_ALGORITHM_RIPEMD160 = 2¶

class MayaDT(epoch)¶

Bases: object

The Maya Datetime object.

add(**kwargs)¶: Returns a new MayaDT object with the given offsets.

property date¶

datetime(to_timezone=None, naive=False)¶

Returns a timezone-aware datetime… Defaulting to UTC (as it should).

Keyword Arguments

{str} -- timezone to convert to (default (to_timezone) – None/UTC)
{bool} -- if True, (naive) – the tzinfo is simply dropped (default: False)

property day¶

property epoch¶

classmethod from_datetime(*args, **kwargs)¶

classmethod from_iso8601(iso8601_string)¶: Returns MayaDT instance from iso8601 string.

static from_rfc2822(rfc2822_string)¶: Returns MayaDT instance from rfc2822 string.

static from_rfc3339(rfc3339_string)¶: Returns MayaDT instance from rfc3339 string.

classmethod from_struct(*args, **kwargs)¶

property hour¶

iso8601()¶: Returns an ISO 8601 representation of the MayaDT.

local_datetime()¶

Returns a local timezone-aware datetime object

It’s the same as: mayaDt.datetime(to_timezone=mayaDt.local_timezone)

property local_timezone¶: Returns the name of the local timezone.

property microsecond¶

property minute¶

property month¶

rfc2822()¶: Returns an RFC 2822 representation of the MayaDT.

rfc3339()¶: Returns an RFC 3339 representation of the MayaDT.

property second¶

slang_date(locale='en')¶

“Returns human slang representation of date.

Keyword Arguments: -- locale to translate to, e.g. 'fr' for french. (locale) – (default: ‘en’ - English)

slang_time(locale='en')¶

“Returns human slang representation of time.

Keyword Arguments: -- locale to translate to, e.g. 'fr' for french. (locale) – (default: ‘en’ - English)

snap(instruction)¶

Returns a new MayaDT object modified by the given instruction.

Powered by snaptime. See https://github.com/zartstrom/snaptime for a complete documentation about the snaptime instructions.

subtract(**kwargs)¶: Returns a new MayaDT object with the given offsets.

subtract_date(**kwargs)¶: Returns a timedelta object with the duration between the dates

property timezone¶: Returns the UTC tzinfo name. It’s always UTC. Always.

property week¶

property weekday¶

Return the day of the week as an integer.

Monday is 1 and Sunday is 7.

property year¶

class Web3(provider: Optional[web3.providers.base.BaseProvider] = None, middlewares: Optional[Sequence[Any]] = None, modules: Optional[Dict[str, Sequence[Any]]] = None, ens: ens.main.ENS = <web3._utils.empty.Empty object>)¶

Bases: object

class EthereumTesterProvider(ethereum_tester: Optional[EthereumTester] = None, api_endpoints: Optional[Dict[str, Dict[str, Callable[[…], web3.types.RPCResponse]]]] = None)¶

Bases: web3.providers.base.BaseProvider

api_endpoints = None¶

ethereum_tester = None¶

isConnected() → typing_extensions.Literal[True][True]¶

make_request(method: NewType.<locals>.new_type, params: Any) → web3.types.RPCResponse¶

middlewares = (<function default_transaction_fields_middleware>, <function construct_web3_formatting_middleware.<locals>.formatter_middleware>)¶

class HTTPProvider(endpoint_uri: Union[NewType.<locals>.new_type, str, None] = None, request_kwargs: Optional[Any] = None, session: Optional[Any] = None)¶

Bases: web3.providers.base.JSONBaseProvider

endpoint_uri = None¶

get_request_headers() → Dict[str, str]¶

get_request_kwargs() → Iterable[Tuple[str, Any]]¶

logger = <Logger web3.providers.HTTPProvider (WARNING)>¶

make_request(method: NewType.<locals>.new_type, params: Any) → web3.types.RPCResponse¶

class IPCProvider(ipc_path: Union[str, pathlib.Path] = None, timeout: int = 10, *args: Any, **kwargs: Any)¶

Bases: web3.providers.base.JSONBaseProvider

logger = <Logger web3.providers.IPCProvider (WARNING)>¶

make_request(method: NewType.<locals>.new_type, params: Any) → web3.types.RPCResponse¶

class Iban(iban: str)¶

Bases: object

address() → Union[str, NewType.<locals>.new_type]¶

Should be called to get client direct address

@method address @returns {String} client direct address

checksum() → str ¶

Should be called to get iban checksum Uses the mod-97-10 checksumming protocol (ISO/IEC 7064:2003)

@method checksum @returns {String} checksum

client() → str ¶

Should be called to get client identifier within institution eg. GAVOFYORK

@method client @returns {String} client identifier

static createIndirect(options: web3.iban.IbanOptions) → web3.iban.Iban¶

Should be used to create IBAN object for given institution and identifier

@method createIndirect @param {Object} options, required options are “institution” and “identifier” @return {Iban} the IBAN object

static fromAddress(address: Union[NewType.<locals>.new_type, NewType.<locals>.new_type]) → web3.iban.Iban¶

This method should be used to create an iban object from ethereum address

@method fromAddress @param {String} address @return {Iban} the IBAN object

static fromBban(bban: str) → web3.iban.Iban¶

Convert the passed BBAN to an IBAN for this country specification. Please note that <i>”generation of the IBAN shall be the exclusive responsibility of the bank/branch servicing the account”</i>. This method implements the preferred algorithm described in http://en.wikipedia.org/wiki/International_Bank_Account_Number#Generating_IBAN_check_digits

@method fromBban @param {String} bban the BBAN to convert to IBAN @returns {Iban} the IBAN object

institution() → str ¶

Should be called to get institution identifier eg. XREG

@method institution @returns {String} institution identifier

isDirect() → bool ¶

Should be called to check if iban number is direct

@method isDirect @returns {Boolean} true if it is, otherwise false

isIndirect() → bool ¶

Should be called to check if iban number if indirect

@method isIndirect @returns {Boolean} true if it is, otherwise false

isValid() → bool ¶

toString() → str ¶

class RequestManager(web3: Web3, provider: Optional[web3.providers.base.BaseProvider] = None, middlewares: Optional[Sequence[Tuple[Callable[[Callable[[NewType.<locals>.new_type, Any], web3.types.RPCResponse], Web3], Any], str]]] = None)¶

Bases: object

async coro_request(method: Union[NewType.<locals>.new_type, Callable[[...], NewType.<locals>.new_type]], params: Any, error_formatters: Optional[Callable[[...], Any]] = None) → Any¶: Couroutine for making a request using the provider

static default_middlewares(web3: Web3) → List[Tuple[Callable[[Callable[[NewType.<locals>.new_type, Any], web3.types.RPCResponse], Web3], Any], str]]¶: List the default middlewares for the request manager. Leaving ens unspecified will prevent the middleware from resolving names.

logger = <Logger web3.RequestManager (WARNING)>¶

property provider¶

receive_async(request_id: uuid.UUID, *args: Any, **kwargs: Any) → NoReturn¶

receive_blocking(request_id: uuid.UUID, timeout: Optional[float] = None) → Any¶

request_async(raw_method: str, raw_params: Any) → uuid.UUID ¶

request_blocking(method: Union[NewType.<locals>.new_type, Callable[[...], NewType.<locals>.new_type]], params: Any, error_formatters: Optional[Callable[[...], Any]] = None) → Any¶: Make a synchronous request using the provider

web3: Web3 = None¶

class WebsocketProvider(endpoint_uri: Union[NewType.<locals>.new_type, str, None] = None, websocket_kwargs: Optional[Any] = None, websocket_timeout: int = 10)¶

Bases: web3.providers.base.JSONBaseProvider

async coro_make_request(request_data: bytes) → web3.types.RPCResponse¶

logger = <Logger web3.providers.WebsocketProvider (WARNING)>¶

make_request(method: NewType.<locals>.new_type, params: Any) → web3.types.RPCResponse¶

property api¶

property clientVersion¶

enable_strict_bytes_type_checking() → None ¶

enable_unstable_package_management_api() → None ¶

property ens¶

eth = None¶

static fromWei(number: int, unit: str) → Union[int, decimal.Decimal]¶: Takes a number of wei and converts it to any other ether unit.

geth = None¶

static isAddress(value: Any) → bool ¶: Checks if the given string in a supported value is an address in any of the known formats.

static isChecksumAddress(value: Any) → bool ¶

isConnected() → bool ¶

is_encodable(_type: str, value: Any) → bool ¶

static keccak(primitive: Union[bytes, int, bool, None] = None, text: Optional[str] = None, hexstr: Optional[NewType.<locals>.new_type] = None) → bytes ¶

property middleware_onion¶

net = None¶

parity = None¶

property pm¶

property provider¶

static sha3(primitive: Union[bytes, int, bool, None] = None, text: Optional[str] = None, hexstr: Optional[NewType.<locals>.new_type] = None) → bytes ¶

solidityKeccak(abi_types: List[str], values: List[Any]) → bytes ¶: Executes keccak256 exactly as Solidity does. Takes list of abi_types as inputs – [uint24, int8[], bool] and list of corresponding values – [20, [-1, 5, 0], True]

soliditySha3(abi_types: List[str], values: List[Any]) → bytes ¶

static toBytes(primitive: Union[bytes, int, bool] = None, hexstr: NewType.<locals>.new_type = None, text: str = None) → bytes ¶

static toChecksumAddress(value: AnyStr) → NewType.<locals>.new_type¶: Makes a checksum address given a supported format.

static toHex(primitive: Union[bytes, int, bool] = None, hexstr: NewType.<locals>.new_type = None, text: str = None) → NewType.<locals>.new_type¶: Auto converts any supported value into its hex representation. Trims leading zeros, as defined in: https://github.com/ethereum/wiki/wiki/JSON-RPC#hex-value-encoding

static toInt(primitive: Union[bytes, int, bool] = None, hexstr: NewType.<locals>.new_type = None, text: str = None) → int ¶

Converts value to its integer representation. Values are converted this way:

primitive:

bytes, bytearrays: big-endian integer

bool: True => 1, False => 0

hexstr: interpret hex as integer

text: interpret as string of digits, like ‘12’ => 12

static toJSON(obj: Dict[Any, Any]) → str ¶: Convert a complex object (like a transaction object) to a JSON string

static toText(primitive: Union[bytes, int, bool] = None, hexstr: NewType.<locals>.new_type = None, text: str = None) → str ¶

static toWei(number: Union[int, float, str, decimal.Decimal], unit: str) → int ¶: Takes a number of a unit and converts it to wei.

property erc20_initial_supply¶

property erc20_reward_supply¶

property erc20_total_supply¶

property staking_deployment_parameters¶: Cast coefficient attributes to uint256 compatible type for solidity+EVM

property slashing_deployment_parameters¶: Cast coefficient attributes to uint256 compatible type for solidity+EVM

property worklock_deployment_parameters¶: 0 token - Token contract 1 escrow - Staking Escrow contract … 2 startBidDate - Timestamp when bidding starts 3 endBidDate - Timestamp when bidding will end 4 endCancellationDate - Timestamp when cancellation window will end 5 boostingRefund - Coefficient to boost refund ETH 6 stakingPeriods - Duration of tokens locking 7 minAllowedBid - Minimum allowed ETH amount for bidding

property bidding_duration¶: Returns the total bidding window duration in seconds.

property cancellation_window_duration¶: Returns the total cancellation window duration in seconds.

class StandardTokenEconomics(initial_supply: int = 1000000000000000000000000000, first_phase_supply: int = 1829579800000000000000000000, first_phase_duration: int = 5, decay_half_life: int = 2, reward_saturation: int = 1, small_stake_multiplier: decimal.Decimal = Decimal('0.5'), hours_per_period: int = 168, **kwargs)¶

Bases: nucypher.blockchain.economics.BaseEconomics

Formula for staking in one period for the second phase: (totalSupply - currentSupply) * (lockedValue / totalLockedValue) * (k1 + allLockedPeriods) / d / k2

d - Coefficient which modifies the rate at which the maximum issuance decays k1 - Numerator of the locking duration coefficient k2 - Denominator of the locking duration coefficient

if allLockedPeriods > maximum_rewarded_periods then allLockedPeriods = maximum_rewarded_periods kappa * log(2) / halving_delay === (k1 + allLockedPeriods) / d / k2

…but also…

kappa = small_stake_multiplier + (1 - small_stake_multiplier) * min(T, T1) / T1 where allLockedPeriods == min(T, T1)

Academic Reference:

NuCypher: Mining & Staking Economics - Michael Egorov, MacLane Wilkison, NuCypher <https://github.com/nucypher/mining-paper/blob/master/mining-paper.pdf>

first_phase_final_period() → int ¶: Returns final period for first phase, assuming that all stakers locked tokens for more than 365 days.

token_supply_at_period(period: int) → int ¶: Returns predicted total supply at specified period, assuming that all stakers locked tokens for more than 365 days.

cumulative_rewards_at_period(period: int) → int ¶

rewards_during_period(period: int) → int ¶

class EconomicsFactory¶

Bases: object

classmethod get_economics(registry: nucypher.blockchain.eth.registry.BaseContractRegistry) → nucypher.blockchain.economics.BaseEconomics ¶

static retrieve_from_blockchain(registry: nucypher.blockchain.eth.registry.BaseContractRegistry) → nucypher.blockchain.economics.BaseEconomics ¶