velvet.vault

Documentation for eth_defi.velvet.vault Python module.

Velvet Capital vault adapter.

Notes:

Classes

VelvetVault

Python interface for interacting with Velvet Capital vaults.

VelvetVaultInfo

Velvet Capital vault deployment info.

Exceptions

VelvetBadConfig

Likely wrong vault address given
exception VelvetBadConfig

Bases: Exception

Likely wrong vault address given

__init__(*args, **kwargs)
__new__(**kwargs)
add_note(note, /)

Add a note to the exception

with_traceback(tb, /)

Set self.__traceback__ to tb and return self.

class VelvetVault

Bases: eth_defi.vault.base.VaultBase

Python interface for interacting with Velvet Capital vaults.

Parameters

spec – Address must be Velvet portfolio address (not vault address)

__init__(web3, spec, api_url='https://intents.velvet.capital/api/v1')
Parameters
property address: eth_typing.evm.HexAddress

Vault contract address.

  • Often vault protocols need multiple contracts per vault, so what this function returns depends on the protocol

property chain_id: int

Chain this vault is on

check_valid_contract()

Check that we have connected to a proper Velvet capital vault contract, not wrong contract.

Raises

AssertionError – Looks bad

property denomination_token: Optional[eth_defi.token.TokenDetails]

Get the token which denominates the vault valuation

  • Used in deposits and redemptions

  • Used in NAV calculation

  • Used in profit benchmarks

  • Usually USDC

Returns

Token wrapper instance.

Maybe None for broken vaults like https://arbiscan.io/address/0x9d0fbc852deccb7dcdd6cb224fa7561efda74411#code

Note

None results are not cached — the next access will retry the on-chain call. This avoids permanently caching a transient RPC failure.

property deposit_manager: eth_defi.vault.deposit_redeem.VaultDepositManager

Deposit manager assocaited with this vault

property description: Optional[str]

Human-readable vault strategy description.

  • Fetched from protocol-specific offchain sources (e.g. Euler GitHub labels, Lagoon web app API)

  • Returns None if the protocol does not provide descriptions or the vault is not in the metadata source

  • Override in subclasses that support offchain metadata

fetch_available_liquidity(block_identifier='latest')

Get the amount of denomination token available for immediate withdrawal.

Only applicable to lending protocol vaults (IPOR, Euler, Morpho, Gearbox, etc.). Non-lending protocols should leave this method unimplemented.

Note: maxRedeem(address(0)) does NOT work as a proxy for available liquidity because it requires a specific address that has already deposited shares. For address(0), balanceOf is always 0, so maxRedeem returns 0 regardless of actual liquidity.

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block to query. Defaults to “latest”.

Raises

NotImplementedError – For non-lending protocol vaults.

Returns

Amount in denomination token units (human-readable Decimal).

Return type

Optional[decimal.Decimal]

fetch_denomination_token()

Read denomination token from onchain.

Use denomination_token() for cached access.

fetch_denomination_token_address()

Get the address for the denomination token.

Triggers RCP call

Return type

eth_typing.evm.HexAddress

fetch_deposit_closed_reason()

Get human-readable reason why deposits are closed.

  • Override in protocol-specific subclasses

  • Default behaviour: assume deposits are always open (return None)

Returns

Human-readable string explaining why deposits are closed, or None if deposits are open.

Example reasons:

  • ”Epoch redemption window closed (opens in 14h)”

  • ”Vault paused by admin”

  • ”Max deposit cap reached”

  • ”Vault utilisation too high”

Return type

Optional[str]

fetch_deposit_next_open()

Get when deposits will next be open.

  • For epoch-based vaults (Ostium, D2), return calculated window open time

  • For non-epoch vaults (Plutus, IPOR, Morpho), return None

  • Override in protocol-specific subclasses

Returns

Naive UTC datetime when deposits will next be available, or None if:

  • Deposits are currently open

  • Timing is unpredictable (manually controlled)

  • Protocol does not support timing information

Return type

Optional[datetime.datetime]

fetch_info()

Read vault parameters from the chain.

Return type

eth_defi.velvet.vault.VelvetVaultInfo

fetch_nav()

Fetch the most recent onchain NAV value.

Returns

Vault NAV, denominated in denomination_token()

fetch_portfolio(universe, block_identifier=None)

Read the current token balances of a vault.

  • SHould be supported by all implementations

Parameters
Return type

eth_defi.vault.base.VaultPortfolio

fetch_redemption_closed_reason()

Get human-readable reason why redemptions are closed.

  • Override in protocol-specific subclasses

  • Default behaviour: assume redemptions are always open (return None)

Returns

Human-readable string explaining why redemptions are closed, or None if redemptions are open.

Example reasons:

  • ”Epoch funding phase in progress (opens in 2d 5h)”

  • ”Vault paused by admin”

  • ”Vault utilisation too high - insufficient liquidity”

Return type

Optional[str]

fetch_redemption_next_open()

Get when withdrawals/redemptions will next be open.

  • For epoch-based vaults (Ostium, D2), return calculated window open time

  • For non-epoch vaults (Plutus, IPOR, Morpho), return None

  • Override in protocol-specific subclasses

Returns

Naive UTC datetime when withdrawals will next be available, or None if:

  • Withdrawals are currently open

  • Timing is unpredictable (manually controlled)

  • Protocol does not support timing information

Return type

Optional[datetime.datetime]

fetch_share_token()

Read share token details onchain.

Use share_token() for cached access.

fetch_utilisation_percent(block_identifier='latest')

Get the percentage of assets currently lent out.

Only applicable to lending protocol vaults (IPOR, Euler, Morpho, Gearbox, etc.). Non-lending protocols should leave this method unimplemented.

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block to query. Defaults to “latest”.

Raises

NotImplementedError – For non-lending protocol vaults.

Returns

Utilisation as float between 0.0 and 1.0 (0% to 100%).

Return type

Optional[float]

property flow_manager: eth_defi.vault.base.VaultFlowManager

Flow manager associated with this vault

get_deposit_fee(block_identifier)

Deposit fee is set to zero by default as vaults usually do not have deposit fees.

Internal: Use get_fee_data().

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) –

Return type

Optional[float]

get_deposit_manager()

Get deposit manager to deposit/redeem from the vault.

Return type

eth_defi.vault.deposit_redeem.VaultDepositManager

get_estimated_lock_up()

What is the estimated lock-up period for this vault.

Returns

None if not know

Return type

Optional[datetime.timedelta]

get_fee_data()

Get fee data structure for this vault.

Raises

ValueError – In the case of broken or unimplemented fee reading methods in the smart contract

Return type

eth_defi.vault.fee.FeeData

get_fee_mode()

Get how this vault accounts its fees.

Return type

Optional[eth_defi.vault.fee.VaultFeeMode]

get_flags()

Get various vault state flags from the smart contract.

Returns

Flag set.

Do not modify in place.

Return type

set[eth_defi.vault.flag.VaultFlag]

get_flow_manager()

Get flow manager to read indiviaul settle events.

get_historical_reader()

Get share price reader to fetch historical returns.

Parameters

stateful – If True, use a stateful reading strategy.

Returns

None if unsupported

Return type

eth_defi.vault.base.VaultHistoricalReader

Get a link to the vault dashboard on its native site.

  • By default, give RouteScan link

Parameters

referral (Optional[str]) – Optional referral code to append to the URL.

Returns

URL string

Return type

str

get_management_fee(block_identifier)

Get the current management fee as a percent.

Internal: Use get_fee_data().

Returns

0.1 = 10%

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) –

Return type

float

get_notes()

Get a human readable message if we know somethign special is going on with this vault.

Return type

Optional[str]

get_performance_fee(block_identifier)

Get the current performance fee as a percent.

Internal: Use get_fee_data().

Returns

0.1 = 10%

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) –

Return type

float

get_protocol_name()

Return the name of the vault protocol.

Return type

str

get_risk()

Get risk profile of this vault.

Return type

Optional[eth_defi.vault.risk.VaultTechnicalRisk]

get_withdraw_fee(block_identifier)

Withdraw fee is set to zero by default as vaults usually do not have withdraw fees.

Internal: Use get_fee_data().

Parameters

block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) –

Return type

float

has_block_range_event_support()

Does this vault support block range-based event queries for deposits and redemptions.

  • If not we use chain balance polling-based approach

has_custom_fees()

Does this vault have custom fee structure reading methods.

Causes risk in the vault comparison.

E.g.

  • Withdraw fee

  • Deposit fee

Returns

True if custom fee reading methods are implemented

Return type

bool

has_deposit_distribution_to_all_positions()

Deposits go automatically to all open positions.

  • Deposits do not land into the vault as cash

  • Instead, smart contracts automatically increase all open positions

  • The behaviour of Velvet Capital

property info: eth_defi.velvet.vault.VelvetVaultInfo

Get info dictionary related to this vault deployment.

  • Get cached data on the various vault parameters

Returns

Vault protocol specific information dictionary

property name: str

Vault name.

prepare_deposit_with_enso(from_, deposit_token_address, amount, slippage)

Prepare a deposit transaction with Enso intents.

  • Velvet trades any incoming assets and distributes them on open positions

Returns

Ethereum transaction payload

Parameters
Return type

dict

prepare_redemption(from_, amount, withdraw_token_address, slippage)

Perform a redemption.

Returns

Ethereum transaction payload

Parameters
Return type

dict

prepare_swap_with_enso(token_in, token_out, swap_amount, slippage, remaining_tokens, swap_all=False, from_=None, retries=5, manage_token_list=True, swap_all_tripwire_pct=0.01)

Prepare a swap transaction using Enso intent engine and Vevlet API.

Parameters
Return type

dict

prepare_swap_with_intent(token_in, token_out, swap_amount, slippage, remaining_tokens, swap_all=False, from_=None, retries=5, manage_token_list=True, swap_all_tripwire_pct=0.01)

Prepare a swap transaction using Enso intent engine and Vevlet API.

Parameters
Return type

dict

property share_token: eth_defi.token.TokenDetails

ERC-20 that presents vault shares.

  • User gets shares on deposit and burns them on redemption

property short_description: Optional[str]

One-liner vault summary.

  • Shorter version of description() suitable for listings and tables

  • Returns None if not available

  • Override in subclasses that support offchain metadata

property symbol

Vault share token symbol

class VelvetVaultInfo

Bases: eth_defi.vault.base.VaultInfo

Velvet Capital vault deployment info.

  • Fetched over proprietary API server

__init__(*args, **kwargs)
__new__(**kwargs)
clear()

Remove all items from the dict.

copy()

Return a shallow copy of the dict.

fromkeys(value=None, /)

Create a new dictionary with keys from iterable and values set to value.

get(key, default=None, /)

Return the value for key if key is in the dictionary, else default.

items()

Return a set-like object providing a view on the dict’s items.

keys()

Return a set-like object providing a view on the dict’s keys.

pop(k[, d]) → v, remove specified key and return the corresponding value.

If the key is not found, return the default if given; otherwise, raise a KeyError.

popitem()

Remove and return a (key, value) pair as a 2-tuple.

Pairs are returned in LIFO (last-in, first-out) order. Raises KeyError if the dict is empty.

setdefault(key, default=None, /)

Insert key with a value of default if key is not in the dictionary.

Return the value for key if key is in the dictionary, else default.

update([E, ]**F) → None.  Update D from mapping/iterable E and F.

If E is present and has a .keys() method, then does: for k in E.keys(): D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]

values()

Return an object providing a view on the dict’s values.