A Python library for interacting and working with the Woop blockchain.
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pywiki/pyhmy/validator.py

818 lines
24 KiB

"""
Load validator information from Harmony blockchain
Create and edit validators
"""
import json
from decimal import Decimal, InvalidOperation
from eth_account.datastructures import SignedTransaction
from .account import is_valid_address
from .constants import (
DEFAULT_ENDPOINT,
DEFAULT_TIMEOUT,
NAME_CHAR_LIMIT,
IDENTITY_CHAR_LIMIT,
WEBSITE_CHAR_LIMIT,
SECURITY_CONTACT_CHAR_LIMIT,
DETAILS_CHAR_LIMIT,
MIN_REQUIRED_DELEGATION,
)
from .exceptions import InvalidValidatorError
from .rpc.exceptions import (
RPCError,
RequestsError,
RequestsTimeoutError,
)
from .staking import get_all_validator_addresses, get_validator_information
from .staking_structures import Directive
from .staking_signing import sign_staking_transaction
class Validator: # pylint: disable=too-many-instance-attributes, too-many-public-methods
"""
Harmony validator
"""
def __init__(self, address):
if not isinstance(address, str):
raise InvalidValidatorError(1, "given ONE address was not a string")
if not is_valid_address(address):
raise InvalidValidatorError(1, f"{address} is not valid ONE address")
self._address = address
self._bls_keys = []
self._bls_key_sigs = []
self._name = None
self._identity = None
self._website = None
self._details = None
self._security_contact = None
self._min_self_delegation = None
self._max_total_delegation = None
self._inital_delegation = None
self._rate = None
self._max_change_rate = None
self._max_rate = None
def _sanitize_input(self, data, check_str=False) -> str:
"""If data is None, return '' else return data.
Raises
------
InvalidValidatorError if check_str is True and str is not passed
"""
if check_str:
if not isinstance(data, str):
raise InvalidValidatorError(
3,
"Expected data to be string "
f"to avoid floating point precision issues but got {data}",
)
return "" if not data else str(data)
def __str__(self) -> str:
"""Returns JSON string representation of Validator fields."""
info = self.export()
for key, value in info.items():
if isinstance(value, Decimal):
info[key] = str(value)
return json.dumps(info)
def __repr__(self) -> str:
return f"<Validator: {hex(id(self))}>"
def get_address(self) -> str:
"""Get validator address.
Returns
-------
str
Validator address
"""
return self._address
def add_bls_key(self, key) -> bool:
"""Add BLS public key to validator BLS keys if not already in list.
Returns
-------
bool
If adding BLS key succeeded
"""
key = self._sanitize_input(key)
if key not in self._bls_keys:
self._bls_keys.append(key)
return True
return False
def remove_bls_key(self, key) -> bool:
"""Remove BLS public key from validator BLS keys if exists.
Returns
-------
bool
If removing BLS key succeeded
"""
key = self._sanitize_input(key)
if key in self._bls_keys:
self._bls_keys.remove(key)
return True
return False
def get_bls_keys(self) -> list:
"""Get list of validator BLS keys.
Returns
-------
list
List of validator BLS keys (strings)
"""
return self._bls_keys
def add_bls_key_sig(self, key) -> bool:
"""Add BLS public key to validator BLS keys if not already in list.
Returns
-------
bool
If adding BLS key succeeded
"""
key = self._sanitize_input(key)
if key not in self._bls_key_sigs:
self._bls_key_sigs.append(key)
return True
return False
def remove_bls_key_sig(self, key) -> bool:
"""Remove BLS public key from validator BLS keys if exists.
Returns
-------
bool
If removing BLS key succeeded
"""
key = self._sanitize_input(key)
if key in self._bls_key_sigs:
self._bls_key_sigs.remove(key)
return True
return False
def get_bls_key_sigs(self) -> list:
"""Get list of validator BLS keys.
Returns
-------
list
List of validator BLS keys (strings)
"""
return self._bls_key_sigs
def set_name(self, name):
"""Set validator name.
Parameters
----------
name: str
Name of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
name = self._sanitize_input(name)
if len(name) > NAME_CHAR_LIMIT:
raise InvalidValidatorError(
3, f"Name must be less than {NAME_CHAR_LIMIT} characters"
)
self._name = name
def get_name(self) -> str:
"""Get validator name.
Returns
-------
str
Validator name
"""
return self._name
def set_identity(self, identity):
"""Set validator identity.
Parameters
----------
identity: str
Identity of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
identity = self._sanitize_input(identity)
if len(identity) > IDENTITY_CHAR_LIMIT:
raise InvalidValidatorError(
3, f"Identity must be less than {IDENTITY_CHAR_LIMIT} characters"
)
self._identity = identity
def get_identity(self) -> str:
"""Get validator identity.
Returns
-------
str
Validator identity
"""
return self._identity
def set_website(self, website):
"""Set validator website.
Parameters
----------
website: str
Website of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
website = self._sanitize_input(website)
if len(website) > WEBSITE_CHAR_LIMIT:
raise InvalidValidatorError(
3, f"Website must be less than {WEBSITE_CHAR_LIMIT} characters"
)
self._website = website
def get_website(self) -> str:
"""Get validator website.
Returns
-------
str
Validator website
"""
return self._website
def set_security_contact(self, contact):
"""Set validator security contact.
Parameters
----------
contact: str
Security contact of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
contact = self._sanitize_input(contact)
if len(contact) > SECURITY_CONTACT_CHAR_LIMIT:
raise InvalidValidatorError(
3,
f"Security contact must be less than {SECURITY_CONTACT_CHAR_LIMIT} characters",
)
self._security_contact = contact
def get_security_contact(self) -> str:
"""Get validator security contact.
Returns
-------
str
Validator security contact
"""
return self._security_contact
def set_details(self, details):
"""Set validator details.
Parameters
----------
details: str
Details of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
details = self._sanitize_input(details)
if len(details) > DETAILS_CHAR_LIMIT:
raise InvalidValidatorError(
3, f"Details must be less than {DETAILS_CHAR_LIMIT} characters"
)
self._details = details
def get_details(self) -> str:
"""Get validator details.
Returns
-------
str
Validator details
"""
return self._details
def set_min_self_delegation(self, delegation):
"""Set validator min self delegation.
Parameters
----------
delegation: int
Minimum self delegation of validator in ATTO
Raises
------
InvalidValidatorError
If input is invalid
"""
delegation = self._sanitize_input(delegation)
try:
delegation = Decimal(delegation)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(
3, "Min self delegation must be a number"
) from exception
if delegation < MIN_REQUIRED_DELEGATION:
raise InvalidValidatorError(
3,
f"Min self delegation must be greater than {MIN_REQUIRED_DELEGATION} ATTO",
)
self._min_self_delegation = delegation
def get_min_self_delegation(self) -> Decimal:
"""Get validator min self delegation.
Returns
-------
Decimal
Validator min self delegation in ATTO
"""
return self._min_self_delegation
def set_max_total_delegation(self, max_delegation):
"""Set validator max total delegation.
Parameters
----------
max_delegation: int
Maximum total delegation of validator in ATTO
Raises
------
InvalidValidatorError
If input is invalid
"""
max_delegation = self._sanitize_input(max_delegation)
try:
max_delegation = Decimal(max_delegation)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(
3, "Max total delegation must be a number"
) from exception
if self._min_self_delegation:
if max_delegation < self._min_self_delegation:
raise InvalidValidatorError(
3,
"Max total delegation must be greater than min self delegation: "
f"{self._min_self_delegation}",
)
else:
raise InvalidValidatorError(
4, "Min self delegation must be set before max total delegation"
)
self._max_total_delegation = max_delegation
def get_max_total_delegation(self) -> Decimal:
"""Get validator max total delegation.
Returns
-------
Decimal
Validator max total delegation in ATTO
"""
return self._max_total_delegation
def set_amount(self, amount):
"""Set validator initial delegation amount.
Parameters
----------
amount: str
Initial delegation amount of validator in ATTO
Raises
------
InvalidValidatorError
If input is invalid
"""
amount = self._sanitize_input(amount)
try:
amount = Decimal(amount)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(3, "Amount must be a number") from exception
if self._min_self_delegation:
if amount < self._min_self_delegation:
raise InvalidValidatorError(
3,
"Amount must be greater than min self delegation: "
f"{self._min_self_delegation}",
)
else:
raise InvalidValidatorError(
4, "Min self delegation must be set before amount"
)
if self._max_total_delegation:
if amount > self._max_total_delegation:
raise InvalidValidatorError(
3,
"Amount must be less than max total delegation: "
f"{self._max_total_delegation}",
)
else:
raise InvalidValidatorError(
4, "Max total delegation must be set before amount"
)
self._inital_delegation = amount
def get_amount(self) -> Decimal:
"""Get validator initial delegation amount.
Returns
-------
Decimal
Intended initial delegation amount in ATTO
"""
return self._inital_delegation
def set_max_rate(self, rate):
"""Set validator max commission rate.
Parameters
----------
rate: str (to avoid precision troubles)
Max commission rate of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
rate = self._sanitize_input(rate, True)
try:
rate = Decimal(rate)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(3, "Max rate must be a number") from exception
if rate < 0 or rate > 1:
raise InvalidValidatorError(3, "Max rate must be between 0 and 1")
self._max_rate = rate
def get_max_rate(self) -> Decimal:
"""Get validator max commission rate.
Returns
-------
Decimal
Validator max rate
"""
return self._max_rate
def set_max_change_rate(self, rate):
"""Set validator max commission change rate.
Parameters
----------
rate: str (to avoid precision troubles)
Max commission change rate of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
rate = self._sanitize_input(rate, True)
try:
rate = Decimal(rate)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(3, "Max change rate must be a number") from exception
if rate < 0:
raise InvalidValidatorError(
3, "Max change rate must be greater than or equal to 0"
)
if self._max_rate:
if rate > self._max_rate:
raise InvalidValidatorError(
3,
f"Max change rate must be less than or equal to max rate: {self._max_rate}",
)
else:
raise InvalidValidatorError(
4, "Max rate must be set before max change rate"
)
self._max_change_rate = rate
def get_max_change_rate(self) -> Decimal:
"""Get validator max commission change rate.
Returns
-------
Decimal (to avoid precision troubles)
Validator max change rate
"""
return self._max_change_rate
def set_rate(self, rate):
"""Set validator commission rate.
Parameters
----------
rate: str (to avoid precision troubles)
Commission rate of validator
Raises
------
InvalidValidatorError
If input is invalid
"""
rate = self._sanitize_input(rate, True)
try:
rate = Decimal(rate)
except (TypeError, InvalidOperation) as exception:
raise InvalidValidatorError(3, "Rate must be a number") from exception
if rate < 0:
raise InvalidValidatorError(3, "Rate must be greater than or equal to 0")
if self._max_rate:
if rate > self._max_rate:
raise InvalidValidatorError(
3, f"Rate must be less than or equal to max rate: {self._max_rate}"
)
else:
raise InvalidValidatorError(4, "Max rate must be set before rate")
self._rate = rate
def get_rate(self) -> Decimal:
"""Get validator commission rate.
Returns
-------
Decimal
Validator rate
"""
return self._rate
def does_validator_exist(
self, endpoint=DEFAULT_ENDPOINT, timeout=DEFAULT_TIMEOUT
) -> bool:
"""Check if validator exists on blockchain.
Parameters
----------
endpoint: :obj:`str`, optional
Endpoint to send request to
timeout: :obj:`int`, optional
Timeout in seconds
Returns
-------
bool
Does validator exist on chain
Raises
------
RPCError, RequestsError, RequestsTimeoutError
If unable to get list of validators on chain
"""
all_validators = get_all_validator_addresses(endpoint, timeout)
if self._address in all_validators:
return True
return False
def load(self, info):
"""Import validator information.
Parameters
----------
info: dict
Validator information with dictionary
Will ignore any extra fields in the input dictionary
Example input:
{
"name": "",
"website": "",
"security-contact": "",
"identity": "",
"details": "",
"amount": 0,
"min-self-delegation": 0,
"max-total-delegation": 0,
"rate": '0',
"max-rate": '0',
"max-change-rate": '0',
"bls-public-keys": [ "" ]
"bls-key-sigs": [ "" ]
}
Raises
------
InvalidValidatorError
If input value is invalid
"""
try:
self.set_name(info["name"])
self.set_identity(info["identity"])
self.set_website(info["website"])
self.set_details(info["details"])
self.set_security_contact(info["security-contact"])
self.set_min_self_delegation(info["min-self-delegation"])
self.set_max_total_delegation(info["max-total-delegation"])
self.set_amount(info["amount"])
self.set_max_rate(info["max-rate"])
self.set_max_change_rate(info["max-change-rate"])
self.set_rate(info["rate"])
self._bls_keys = []
for key in info["bls-public-keys"]:
self.add_bls_key(key)
self._bls_key_sigs = []
for key in info["bls-key-sigs"]:
self.add_bls_key_sig(key)
except KeyError as exception:
raise InvalidValidatorError(3, "Info has missing key") from exception
def load_from_blockchain(
self, endpoint=DEFAULT_ENDPOINT, timeout=DEFAULT_TIMEOUT
):
"""Import validator information from blockchain with given address At
the moment, this is unable to fetch the BLS Signature, which is not
implemented in the Node API.
Parameters
----------
endpoint: :obj:`str`, optional
Endpoint to send request to
timeout: :obj:`int`, optional
Timeout in seconds
Raises
------
InvalidValidatorError
If any error occur getting & importing validator information from the blockchain
"""
try:
if not self.does_validator_exist(endpoint, timeout):
raise InvalidValidatorError(
5, f"Validator does not exist on chain according to {endpoint}"
)
except (RPCError, RequestsError, RequestsTimeoutError) as exception:
raise InvalidValidatorError(
5, "Error requesting validator information"
) from exception
try:
validator_info = get_validator_information(self._address, endpoint, timeout)
except (RPCError, RequestsError, RequestsTimeoutError) as exception:
raise InvalidValidatorError(
5, "Error requesting validator information"
) from exception
# Skip additional sanity checks when importing from chain
try:
info = validator_info["validator"]
self._name = info["name"]
self._identity = info["identity"]
self._website = info["website"]
self._details = info["details"]
self._security_contact = info["security-contact"]
self._min_self_delegation = info["min-self-delegation"]
self._max_total_delegation = info["max-total-delegation"]
self._inital_delegation = (
self._min_self_delegation
) # Since validator exists, set initial delegation to 0
self._max_rate = Decimal(info["max-rate"])
self._max_change_rate = Decimal(info["max-change-rate"])
self._rate = Decimal(info["rate"])
self._bls_keys = info["bls-public-keys"]
except KeyError as exception:
raise InvalidValidatorError(
5, "Error importing validator information from RPC result"
) from exception
def export(self) -> dict:
"""Export validator information as dict.
Returns
-------
dict
Dictionary representation of validator
"""
info = {
"validator-addr": self._address,
"name": self._name,
"website": self._website,
"security-contact": self._security_contact,
"identity": self._identity,
"details": self._details,
"amount": self._inital_delegation,
"min-self-delegation": self._min_self_delegation,
"max-total-delegation": self._max_total_delegation,
"rate": self._rate,
"max-rate": self._max_rate,
"max-change-rate": self._max_change_rate,
"bls-public-keys": self._bls_keys,
"bls-key-sigs": self._bls_key_sigs,
}
return info
def sign_create_validator_transaction( # pylint: disable=too-many-arguments
self, nonce, gas_price, gas_limit, private_key, chain_id=None
) -> SignedTransaction:
"""Create but not post a transaction to Create the Validator using
private_key.
Returns
-------
SignedTransaction object, the hash of which can be used to send the transaction
using transaction.send_raw_transaction
Raises
------
rlp.exceptions.ObjectSerializationError for malformed inputs
API Reference
-------------
https://github.com/harmony-one/sdk/blob/99a827782fabcd5f91f025af0d8de228956d42b4/packages/harmony-staking/src/stakingTransaction.ts#L413
"""
info = self.export().copy()
info["directive"] = Directive.CreateValidator
info["validatorAddress"] = info.pop("validator-addr") # change the key
info["nonce"] = nonce
info["gasPrice"] = gas_price
info["gasLimit"] = gas_limit
if chain_id:
info["chainId"] = chain_id
return sign_staking_transaction(info, private_key)
def sign_edit_validator_transaction( # pylint: disable=too-many-arguments
self,
nonce,
gas_price,
gas_limit,
rate,
bls_key_to_remove,
bls_key_to_add,
bls_key_to_add_sig,
private_key,
chain_id=None,
) -> SignedTransaction:
"""Create but not post a transaction to Edit the Validator using
private_key.
Returns
-------
SignedTransaction object, the hash of which can be used to send the transaction
using transaction.send_raw_transaction
Raises
------
rlp.exceptions.ObjectSerializationError for malformed inputs
API Reference
-------------
https://github.com/harmony-one/sdk/blob/99a827782fabcd5f91f025af0d8de228956d42b4/packages/harmony-staking/src/stakingTransaction.ts#L460
"""
self.set_rate(rate)
self.add_bls_key(bls_key_to_add)
self.remove_bls_key(bls_key_to_remove)
info = self.export().copy()
info["directive"] = Directive.EditValidator
info["validatorAddress"] = info.pop("validator-addr") # change the key
info["nonce"] = nonce
info["gasPrice"] = gas_price
info["gasLimit"] = gas_limit
_ = info.pop("max-rate") # not needed
_ = info.pop("max-change-rate") # not needed
_ = info.pop("bls-public-keys") # remove this list
_ = info.pop("amount") # also unused
info["bls-key-to-remove"] = bls_key_to_remove
info["bls-key-to-add"] = bls_key_to_add
info["bls-key-to-add-sig"] = bls_key_to_add_sig
if chain_id:
info["chainId"] = chain_id
return sign_staking_transaction(info, private_key)