Contract Source Code (Vyper language format)

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# @version 0.3.7

"""
@title Yearn Vault Factory
@license GNU AGPLv3
@author yearn.finance
@notice
    This vault Factory can be used by anyone wishing to deploy their own
    ERC4626 compliant Yearn V3 Vault of the same API version.

    The factory uses the Blueprint (ERC-5202) standard to handle the
    deployment of any new vaults off of the immutable address stored 
    at `VAULT_BLUEPRINT`. This allows the vaults to be deployed and
    initialized fully on-chain with their init byte code, thus not 
    requiring any delegatecall patterns or post deployment initialization.
    The deployments are done through create2 with a specific `salt` 
    that is derived from a combination of the deployer's address,
    the underlying asset used, as well as the name and symbol specified.
    Meaning a deployer will not be able to deploy the exact same vault
    twice and will need to use different name and or symbols for vaults
    that use the same other parameters such as `asset`.

    The factory also holds the protocol fee configs for each vault and strategy
    of its specific `API_VERSION` that determine how much of the fees
    charged are designated "protocol fees" and sent to the designated
    `fee_recipient`. The protocol fees work through a revenue share system,
    where if the vault or strategy decides to charge X amount of total
    fees during a `report` the protocol fees are a percent of X.
    The protocol fees will be sent to the designated fee_recipient and
    then (X - protocol_fees) will be sent to the vault/strategy specific
    fee recipient.
"""

from vyper.interfaces import ERC20

event NewVault:
    vault_address: indexed(address)
    asset: indexed(address)

event UpdateProtocolFeeBps:
    old_fee_bps: uint16
    new_fee_bps: uint16

event UpdateProtocolFeeRecipient:
    old_fee_recipient: indexed(address)
    new_fee_recipient: indexed(address)

event UpdateCustomProtocolFee:
    vault: indexed(address)
    new_custom_protocol_fee: uint16

event RemovedCustomProtocolFee:
    vault: indexed(address)

event FactoryShutdown:
    pass

event UpdateGovernance:
    governance: indexed(address)

event NewPendingGovernance:
    pending_governance: indexed(address)

struct PFConfig:
    # Percent of protocol's split of fees in Basis Points.
    fee_bps: uint16
    # Address the protocol fees get paid to.
    fee_recipient: address

# Identifier for this version of the vault.
API_VERSION: constant(String[28]) = "3.0.1"

# The max amount the protocol fee can be set to.
MAX_FEE_BPS: constant(uint16) = 5_000 # 50%

# The address that all newly deployed vaults are based from.
VAULT_BLUEPRINT: immutable(address)

# State of the Factory. If True no new vaults can be deployed.
shutdown: public(bool)

# Address that can set or change the fee configs.
governance: public(address)
# Pending governance waiting to be accepted.
pending_governance: public(address)

# Name for identification.
name: public(String[64])

# The default config for assessing protocol fees.
default_protocol_fee_config: public(PFConfig)
# Custom fee to charge for a specific vault or strategy.
custom_protocol_fee: public(HashMap[address, uint16])
# Represents if a custom protocol fee should be used.
use_custom_protocol_fee: public(HashMap[address, bool])

@external
def __init__(name: String[64], vault_blueprint: address, governance: address):
    self.name = name
    VAULT_BLUEPRINT = vault_blueprint
    self.governance = governance

@external
def deploy_new_vault(
    asset: ERC20, 
    name: String[64], 
    symbol: String[32], 
    role_manager: address, 
    profit_max_unlock_time: uint256
) -> address:
    """
    @notice Deploys a new vault base on the bLueprint.
    @param asset The asset to be used for the vault.
    @param name The name of the new vault.
    @param symbol The symbol of the new vault.
    @param role_manager The address of the role manager.
    @param profit_max_unlock_time The time over which the profits will unlock.
    @return The address of the new vault.
    """
    # Make sure the factory is not shutdown.
    assert not self.shutdown, "shutdown"

    # Deploy the new vault using the blueprint.
    vault_address: address = create_from_blueprint(
            VAULT_BLUEPRINT, 
            asset, 
            name, 
            symbol, 
            role_manager, 
            profit_max_unlock_time, 
            code_offset=3, 
            salt=keccak256(_abi_encode(msg.sender, asset.address, name, symbol))
        )
        
    log NewVault(vault_address, asset.address)
    return vault_address

@view
@external
def vault_blueprint()-> address:
    """
    @notice Get the address of the vault blueprint
    @return The address of the vault blueprint
    """
    return VAULT_BLUEPRINT

@view
@external
def apiVersion() -> String[28]:
    """
    @notice Get the API version of the factory.
    @return The API version of the factory.
    """
    return API_VERSION

@view
@external
def protocol_fee_config() -> PFConfig:
    """
    @notice Called during vault and strategy reports 
    to retrieve the protocol fee to charge and address
    to receive the fees.
    @return The protocol fee config for the msg sender.
    """
    # If there is a custom protocol fee set we return it.
    if self.use_custom_protocol_fee[msg.sender]:
        # Always use the default fee recipient even with custom fees.
        return PFConfig({
            fee_bps: self.custom_protocol_fee[msg.sender],
            fee_recipient: self.default_protocol_fee_config.fee_recipient
        })
    else:
        # Otherwise return the default config.
        return self.default_protocol_fee_config

@external
def set_protocol_fee_bps(new_protocol_fee_bps: uint16):
    """
    @notice Set the protocol fee in basis points
    @dev Must be below the max allowed fee, and a default
    fee_recipient must be set so we don't issue fees to the 0 address.
    @param new_protocol_fee_bps The new protocol fee in basis points
    """
    assert msg.sender == self.governance, "not governance"
    assert new_protocol_fee_bps <= MAX_FEE_BPS, "fee too high"
    assert self.default_protocol_fee_config.fee_recipient != empty(address), "no recipient"

    log UpdateProtocolFeeBps(
        self.default_protocol_fee_config.fee_bps, 
        new_protocol_fee_bps
    )

    self.default_protocol_fee_config.fee_bps = new_protocol_fee_bps

@external
def set_protocol_fee_recipient(new_protocol_fee_recipient: address):
    """
    @notice Set the protocol fee recipient
    @dev Can never be set to 0 to avoid issuing fees to the 0 address.
    @param new_protocol_fee_recipient The new protocol fee recipient
    """
    assert msg.sender == self.governance, "not governance"
    assert new_protocol_fee_recipient != empty(address), "zero address"

    log UpdateProtocolFeeRecipient(
        self.default_protocol_fee_config.fee_recipient,
        new_protocol_fee_recipient
    )
    
    self.default_protocol_fee_config.fee_recipient = new_protocol_fee_recipient

@external
def set_custom_protocol_fee_bps(vault: address, new_custom_protocol_fee: uint16):
    """
    @notice Allows Governance to set custom protocol fees
    for a specific vault or strategy.
    @dev Must be below the max allowed fee, and a default
    fee_recipient must be set so we don't issue fees to the 0 address.
    @param vault The address of the vault or strategy to customize.
    @param new_custom_protocol_fee The custom protocol fee in BPS.
    """
    assert msg.sender == self.governance, "not governance"
    assert new_custom_protocol_fee <= MAX_FEE_BPS, "fee too high"
    assert self.default_protocol_fee_config.fee_recipient != empty(address), "no recipient"

    self.custom_protocol_fee[vault] = new_custom_protocol_fee

    # If this is the first time a custom fee is set for this vault
    # set the bool indicator so it returns the correct fee.
    if not self.use_custom_protocol_fee[vault]:
        self.use_custom_protocol_fee[vault] = True

    log UpdateCustomProtocolFee(vault, new_custom_protocol_fee)

@external 
def remove_custom_protocol_fee(vault: address):
    """
    @notice Allows governance to remove a previously set
    custom protocol fee.
    @param vault The address of the vault or strategy to
    remove the custom fee for.
    """
    assert msg.sender == self.governance, "not governance"

    # Reset the custom fee to 0.
    self.custom_protocol_fee[vault] = 0

    # Set custom fee bool back to false.
    self.use_custom_protocol_fee[vault] = False

    log RemovedCustomProtocolFee(vault)

@external
def shutdown_factory():
    """
    @notice To stop new deployments through this factory.
    @dev A one time switch available for governance to stop
    new vaults from being deployed through the factory.
    NOTE: This will have no effect on any previously deployed
    vaults that deployed from this factory.
    """
    assert msg.sender == self.governance, "not governance"
    assert self.shutdown == False, "shutdown"

    self.shutdown = True
    
    log FactoryShutdown()

@external
def set_governance(new_governance: address):
    """
    @notice Set the governance address
    @param new_governance The new governance address
    """
    assert msg.sender == self.governance, "not governance"
    self.pending_governance = new_governance

    log NewPendingGovernance(new_governance)

@external
def accept_governance():
    """
    @notice Accept the governance address
    """
    assert msg.sender == self.pending_governance, "not pending governance"
    self.governance = msg.sender
    self.pending_governance = empty(address)

    log UpdateGovernance(msg.sender)

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0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000de992c652b266ae649fec8048afc35954bee614500000000000000000000000033333333d5efb92f19a5f94a43456b3cec2797ae000000000000000000000000000000000000000000000000000000000000001a596561726e2076332e302e31205661756c7420466163746f7279000000000000

-----Decoded View---------------
Arg [0] : name (string): Yearn v3.0.1 Vault Factory
Arg [1] : vault_blueprint (address): 0xDE992C652b266AE649FEC8048aFC35954Bee6145
Arg [2] : governance (address): 0x33333333D5eFb92f19a5F94a43456b3cec2797AE

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 000000000000000000000000de992c652b266ae649fec8048afc35954bee6145
Arg [2] : 00000000000000000000000033333333d5efb92f19a5f94a43456b3cec2797ae
Arg [3] : 000000000000000000000000000000000000000000000000000000000000001a
Arg [4] : 596561726e2076332e302e31205661756c7420466163746f7279000000000000