BullaVault

Documentation for eth_defi.erc_4626.vault_protocol.bulla.vault.BullaVault Python class.

class BullaVault

Bases: eth_defi.erc_4626.vault.ERC4626Vault

Read a Bulla Network Factoring vault.

The vault exposes the standard asset and share-accounting interface, but its operational flows are governed by Bulla’s permission and redemption queue contracts. This adapter supplies safe read support only until a permissioned end-to-end transaction flow can be certified.

Parameters

web3 – Connection we bind this instance to
spec – Chain, address tuple
token_cache –
Cache used with fetch_erc20_details() to avoid multiple calls to the same token.

Reduces the number of RPC calls when scanning multiple vaults.
features – Pass vault feature flags along, externally detected.
default_block_identifier –
Override block identifier for on-chain metadata reads.

When None, use get_safe_cached_latest_block_number() (the default, safe for broken RPCs). Set to "latest" for freshly deployed vaults whose contracts do not exist at the safe-cached block.
require_denomination_token – If True, accessing denomination_token will raise RuntimeError when the on-chain lookup returns None.

Attributes summary

`address`	Get the vault smart contract address.
`bulla_metadata`	Return the reviewed public metadata for this exact Bulla pool.
`chain_id`	Chain this vault is on
`denomination_token`	Get the token which denominates the vault valuation
`deposit_manager`	Deposit manager assocaited with this vault
`description`	Return the public long description for this reviewed Bulla pool.
`erc_7540`	Is this ERC-7540 vault with asynchronous deposits.
`flow_manager`	Flow manager associated with this vault
`info`	Get info dictionary related to this vault deployment.
`manager_name`	Return Bulla's published pool-manager attribution, if available.
`name`	Vault name.
`share_token`	ERC-20 that presents vault shares.
`short_description`	Return the public one-line summary for this reviewed Bulla pool.
`symbol`	Vault share token symbol
`underlying_token`	Alias for `denomination_token()`
`vault_address`
`vault_address_checksumless`
`vault_contract`	Get vault deployment.
`whitelist_notes`	Optional qualification for the exported whitelist status.

Methods summary

`__init__`(web3, spec[, token_cache, ...])	param web3
`can_check_deposit`()	Check if maxDeposit(address(0)) can be used to check global deposit availability.
`can_check_redeem`()	Check if maxRedeem(address(0)) can be used to check global redemption availability.
`fetch_available_liquidity`([block_identifier])	Get the amount of denomination token available for immediate withdrawal.
`fetch_bulla_fee_data`([block_identifier])	Fetch all pool-wide Bulla fee configuration and accrued balances.
`fetch_bulla_invoice_fee_data`(invoice_id[, ...])	Fetch native fee terms for one Bulla invoice approval.
`fetch_denomination_token`()	Read denomination token from onchain.
`fetch_denomination_token_address`()	Get the `asset()` denomination token address of this vault.
`fetch_deposit_closed_reason`()	Explain why public deposits are unavailable through this adapter.
`fetch_deposit_next_open`()	Get when deposits will next be open.
`fetch_info`()	Use `info()` property for cached access.
`fetch_minimum_deposit`([block_identifier])	Fetch a source-proven minimum deposit in decimal token units.
`fetch_minimum_redemption`([block_identifier])	Fetch a source-proven redemption minimum in decimal share units.
`fetch_nav`([block_identifier])	Fetch the most recent onchain NAV value.
`fetch_portfolio`(universe[, ...])	Read the current token balances of a vault.
`fetch_redemption_closed_reason`()	Explain why public redemptions are unavailable through this adapter.
`fetch_redemption_next_open`()	Get when withdrawals/redemptions will next be open.
`fetch_scan_record_extra_data`()	Fetch protocol-specific private scan row columns.
`fetch_share_price`(block_identifier)	Get the current share price.
`fetch_share_token`()	Read share token details onchain.
`fetch_share_token_address`([block_identifier])	Get share token of this vault.
`fetch_total_assets`(block_identifier)	What is the total NAV of the vault.
`fetch_total_supply`(block_identifier)	What is the current outstanding shares.
`fetch_utilisation_percent`([block_identifier])	Get the percentage of assets currently lent out.
`fetch_vault_info`()	Get all information we can extract from the vault smart contracts.
`get_deposit_fee`(block_identifier)	Return zero because Bulla V2.1 does not charge an ERC-4626 entry fee.
`get_deposit_manager`()	Block the generic ERC-4626 transaction manager.
`get_deposit_manager_capability`()	Declare the exact generic ERC-4626 implementation's two-way flow.
`get_estimated_lock_up`()	Return no fixed lock-up estimate for the pool.
`get_fee_data`()	Map Bulla's pool configuration into the shared fee-data schema.
`get_fee_mode`()	Get how this vault accounts its fees.
`get_flags`()	Get various vault state flags from the smart contract.
`get_flow_manager`()	Get flow manager to read indiviaul settle events.
`get_historical_reader`(stateful)	Get share price reader to fetch historical returns.
`get_link`([referral])	Return Bulla's public pool dashboard.
`get_management_fee`(block_identifier)	Return Bulla's administrator rate as the generic management fee.
`get_notes`()	Get a human readable message if we know somethign special is going on with this vault.
`get_performance_fee`(block_identifier)	Return zero because Bulla has no vault-wide performance fee.
`get_protocol_name`()	Return the name of the vault protocol.
`get_risk`()	Get risk profile of this vault.
`get_share_price_source`()	Return the standard ERC-4626 share-price source.
`get_spec`()
`get_synchronous_deposit_manager_capability`()	Build static metadata for a verified synchronous manager.
`get_whitelist_notes`()	Return an export caveat for the vault-wide whitelist status.
`get_withdraw_fee`(block_identifier)	Return zero because Bulla V2.1 does not charge an ERC-4626 exit fee.
`has_block_range_event_support`()	Does this vault support block range-based event queries for deposits and redemptions.
`has_custom_fees`()	Report that Bulla invoice-financing fees exceed the shared model.
`has_deposit_distribution_to_all_positions`()	Deposits go automatically to all open positions.
`is_account_whitelisted`(address)	Determine whether an account has completed the vault's KYC policy.
`is_valid`()	Check if this vault is valid.
`is_whitelisted_deposit`()	Determine whether deposits require KYC or identity approval.
`supports_generic_deposit_manager`()	Check whether the live vault exposes the standard ERC-4626 surface.

property bulla_metadata: Optional[eth_defi.erc_4626.vault_protocol.bulla.offchain_metadata.BullaVaultMetadata]

Return the reviewed public metadata for this exact Bulla pool.

Bulla does not provide a public, per-pool metadata API comparable to Lagoon’s. The address-scoped lookup uses only Bulla’s public TCS pages and returns None for every unreviewed pool, avoiding incorrect reuse of the TCS description or manager name.

Returns: Public Bulla pool metadata, if available.

property description: Optional[str]: Return the public long description for this reviewed Bulla pool.

property short_description: Optional[str]: Return the public one-line summary for this reviewed Bulla pool.

property manager_name: Optional[str]: Return Bulla’s published pool-manager attribution, if available.

fetch_bulla_fee_data(block_identifier='latest')

Fetch all pool-wide Bulla fee configuration and accrued balances.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block tag or number shared by all fee reads.
Returns: Bulla-native pool fee snapshot.
Return type: eth_defi.erc_4626.vault_protocol.bulla.vault.BullaFeeData

fetch_bulla_invoice_fee_data(invoice_id, block_identifier='latest')

Fetch native fee terms for one Bulla invoice approval.

Parameters

invoice_id (int) – Bulla Claim invoice identifier.
block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block tag or number at which to read the terms.

Returns

Per-invoice Bulla fee record, including underwriter spread.

Return type

eth_defi.erc_4626.vault_protocol.bulla.vault.BullaInvoiceFeeData

get_fee_data()

Map Bulla’s pool configuration into the shared fee-data schema.

This is an internalised-skimming record: Bulla removes financing fees before they contribute to the capital account backing the share price. The administrator rate is retained as management; performance, deposit and withdrawal rates are explicitly zero. See BullaFeeData.as_generic_fee_data() for the source-linked accounting rationale and the Bulla-native fields that remain outside the shared model.

Returns: Generic fee data with a fees-net share price.
Return type: eth_defi.vault.fee.FeeData

get_management_fee(block_identifier)

Return Bulla’s administrator rate as the generic management fee.

The rate is prorated over invoice financing periods by Bulla’s fee library, making it the closest mapped value in the shared interface.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block at which the fee would be read.
Returns: Administrator fee ratio, such as 0.01 for 100 basis points.
Return type: float

get_performance_fee(block_identifier)

Return zero because Bulla has no vault-wide performance fee.

An underwriter can set an invoice-specific spreadBps, but this is part of the invoice financing calculation, not a percentage of vault investment profits. The V2.1 reconciliation logic puts that spread in adminFeeBalance before it calculates the capital account used for share redemptions. It is therefore represented by the internalised_skimming mode rather than this generic field. See the verified BullaFactoringV2_1 source.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Unused because this fee is structurally zero.
Returns: Always 0.0.
Return type: float

get_deposit_fee(block_identifier)

Return zero because Bulla V2.1 does not charge an ERC-4626 entry fee.

Bulla’s protocol charge applies when a pool finances an invoice, not when a liquidity provider deposits into the ERC-4626 share contract.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Unused because this fee is structurally zero.
Returns: Always 0.0.
Return type: float

get_withdraw_fee(block_identifier)

Return zero because Bulla V2.1 does not charge an ERC-4626 exit fee.

A redemption can be permissioned or queued, but the reviewed contract does not expose a percentage fee deducted from the LP’s withdrawal.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Unused because this fee is structurally zero.
Returns: Always 0.0.
Return type: float

has_custom_fees()

Report that Bulla invoice-financing fees exceed the shared model.

The generic zero performance/deposit/withdraw values do not mean Bulla has no fees. The protocol supports distinct protocol, administrator and underwriter-spread components, and the latter differs between financing operations. Those charges are reflected in the fees-net share value and can be inspected through the Bulla-native data classes.

Returns: Always True for Bulla Factoring vaults.
Return type: bool

get_estimated_lock_up()

Return no fixed lock-up estimate for the pool.

Withdrawals depend on pool liquidity and can enter a FIFO redemption queue, so no reliable time period can be inferred from the contract.

Returns: None because redemption timing is pool-state dependent.
Return type: Optional[datetime.timedelta]

get_deposit_manager()

Block the generic ERC-4626 transaction manager.

Bulla pools can gate deposits and redemptions through distinct permission managers, while redemption can require a queued claim when liquidity is unavailable. A generic synchronous manager would promise a lifecycle this adapter has not certified.

Raises: NotImplementedError – Always, by deliberate transaction-safety policy.
Return type: eth_defi.vault.deposit_redeem.VaultDepositManager

fetch_deposit_closed_reason()

Explain why public deposits are unavailable through this adapter.

Returns: Permanent transaction-adapter block reason.
Return type: str

fetch_redemption_closed_reason()

Explain why public redemptions are unavailable through this adapter.

Returns: Permanent transaction-adapter block reason.
Return type: str

get_link(referral=None)

Return Bulla’s public pool dashboard.

The dashboard is the protocol’s public entry point and does not expose a stable per-vault URL pattern for every permissioned pool.

Parameters: referral (Optional[str]) – Unused optional referral value.
Returns: URL for Bulla Finance liquidity pools.
Return type: str

__init__(web3, spec, token_cache=None, features=None, default_block_identifier=None, require_denomination_token=False)

Parameters

web3 (web3.main.Web3) – Connection we bind this instance to
spec (eth_defi.vault.base.VaultSpec) – Chain, address tuple
token_cache (Optional[dict]) –
Cache used with fetch_erc20_details() to avoid multiple calls to the same token.

Reduces the number of RPC calls when scanning multiple vaults.
features (Optional[set[eth_defi.erc_4626.core.ERC4626Feature]]) – Pass vault feature flags along, externally detected.
default_block_identifier (Optional[Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, hexbytes.main.HexBytes, int]]) –
Override block identifier for on-chain metadata reads.

When None, use get_safe_cached_latest_block_number() (the default, safe for broken RPCs). Set to "latest" for freshly deployed vaults whose contracts do not exist at the safe-cached block.
require_denomination_token (bool) – If True, accessing denomination_token will raise RuntimeError when the on-chain lookup returns None.

property address: eth_typing.evm.HexAddress: Get the vault smart contract address.

can_check_deposit()

Check if maxDeposit(address(0)) can be used to check global deposit availability.

Most ERC-4626 vaults implement maxDeposit in a way that returns meaningful values when called with address(0):

Returns 0 when deposits are globally closed/capped
Returns a positive value indicating maximum deposit allowed

Override to return False in subclasses where maxDeposit(address(0)) doesn’t provide meaningful global availability information.

Returns: True if maxDeposit(address(0)) returns meaningful values for global deposit availability checking.
Return type: bool

can_check_redeem()

Check if maxRedeem(address(0)) can be used to check global redemption availability.

Most protocols return 0 for maxRedeem(address(0)) because that address has no balance/shares, not because redemptions are closed:

Gearbox: maxRedeem returns min(balanceOf(owner), convertToShares(availableLiquidity))
Most vaults: Return 0 because address(0) has no shares

Some protocols do use maxRedeem(address(0)) meaningfully:

Morpho, IPOR, Plutus: Return 0 when redemptions are globally blocked

Override to return True in subclasses that support address(0) redemption checks.

Returns: True if maxRedeem(address(0)) returns meaningful values for global redemption availability checking.
Return type: bool

property chain_id: int: Chain this vault is on

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 erc_7540: bool

Is this ERC-7540 vault with asynchronous deposits.

For example previewDeposit() function and other functions will revert

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.

Return type: Optional[eth_defi.token.TokenDetails]

fetch_denomination_token_address()

Get the asset() denomination token address of this vault.

Results are disk-cached per (chain_id, vault_address) via eth_defi.erc_4626.vault_token when the vault was constructed with a eth_defi.token.TokenDiskCache and no pinned default_block_identifier. The denomination token is immutable post-deployment, so the cached value is correct regardless of which block the caller would have asked for.

Only a definitive non-null answer is persisted. The None path taken on revert / broken contract is never cached, matching the behaviour of eth_defi.vault.base.VaultBase.denomination_token() which explicitly avoids memoising None so transient failures can be retried.

To disable the cache, pass token_cache=None (or any non- TokenDiskCache dict) when constructing the vault, or construct with a pinned default_block_identifier.

Returns: Denomination token address, or None if the vault contract is broken and did not return a valid address.
Return type: Optional[eth_typing.evm.HexAddress]

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()

Use info() property for cached access.

Returns: See LagoonVaultInfo
Return type: eth_defi.erc_4626.vault.ERC4626VaultInfo

fetch_minimum_deposit(block_identifier='latest')

Fetch a source-proven minimum deposit in decimal token units.

A None result means this adapter does not expose a known minimum; it does not prove the protocol accepts arbitrarily small deposits. A zero result means the adapter positively established that the vault has no minimum deposit.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block at which to read the protocol configuration.
Returns: Decimal denomination-token minimum, or None when unknown.
Return type: Optional[decimal.Decimal]

fetch_minimum_redemption(block_identifier='latest')

Fetch a source-proven redemption minimum in decimal share units.

A None result means this adapter does not expose a known minimum; it does not prove the protocol accepts arbitrarily small redemptions. A zero result means the adapter positively established that the vault has no minimum redemption.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block at which to read the protocol configuration.
Returns: Decimal vault-share minimum, or None when unknown.
Return type: Optional[decimal.Decimal]

fetch_nav(block_identifier=None)

Fetch the most recent onchain NAV value.

In the case of Lagoon, this is the last value written in the contract with updateNewTotalAssets() and ` settleDeposit()`
TODO: updateNewTotalAssets() there is no way to read pending asset update on chain

Returns: Vault NAV, denominated in denomination_token()
Return type: decimal.Decimal

fetch_portfolio(universe, block_identifier=None, allow_fallback=True)

Read the current token balances of a vault.

SHould be supported by all implementations

Parameters

universe (eth_defi.vault.base.TradingUniverse) –
block_identifier (Optional[Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, hexbytes.main.HexBytes, int]]) –
allow_fallback (bool) –

Return type

eth_defi.vault.base.VaultPortfolio

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_scan_record_extra_data()

Fetch protocol-specific private scan row columns.

Some vault protocols expose structured metadata that is useful for the raw scanner output but does not fit the shared human-readable columns. Override this hook in protocol-specific subclasses instead of adding a separate branch to eth_defi.erc_4626.scan.create_vault_scan_record().

Returns: Mapping of private scan-row column names, usually prefixed with _. The default implementation returns no extra data.
Return type: dict[str, object]

fetch_share_price(block_identifier)

Get the current share price.

Returns

The share price in underlying token.

If supply is zero return zero.

Parameters

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

Return type

decimal.Decimal

fetch_share_token()

Read share token details onchain.

Use share_token() for cached access.

Return type: eth_defi.token.TokenDetails

fetch_share_token_address(block_identifier='latest')

Get share token of this vault.

Vault itself (ERC-4626)
share() accessor (ERC-7575)

Results are disk-cached per (chain_id, vault_address) via eth_defi.erc_4626.vault_token when the vault was constructed with a eth_defi.token.TokenDiskCache. Under normal circumstances the block_identifier argument is effectively ignored on cache hits — ERC-4626 share tokens are immutable post-deployment, so the cached value is correct regardless of which block the caller asked for.

Only a definitive answer from the chain is ever persisted: a successful call, or a revert matching KNOWN_SHARE_TOKEN_ERROR_MESSAGES (which positively classifies the contract as non-ERC-7575). Transient RPC failures (ProbablyNodeHasNoBlock, HTTP 502) fall back to self.vault_address but are not written to the cache, so a flaky node cannot poison a real ERC-7575 vault’s entry.

To disable the cache, pass token_cache=None (or any non- TokenDiskCache dict) when constructing the vault, or construct with a pinned default_block_identifier to force the uncached historical-read path on every call.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, hexbytes.main.HexBytes, int]) – Block to query. Cache is only consulted/written when the caller passes the default "latest" and the vault instance has no pinned default_block_identifier.
Return type: eth_typing.evm.HexAddress

fetch_total_assets(block_identifier)

What is the total NAV of the vault.

Example:

assert vault.denomination_token.symbol == "USDC"
assert vault.share_token.symbol == "ipUSDCfusion"
assert vault.fetch_total_assets(block_identifier=test_block_number) == Decimal("1437072.77357")
assert vault.fetch_total_supply(block_identifier=test_block_number) == Decimal("1390401.22652875")

Parameters

Block number to read.

Use web3.eth.block_number for the last block.

Returns

The vault value in underlyinh token

Return type

Optional[decimal.Decimal]

fetch_total_supply(block_identifier)

What is the current outstanding shares.

Example:

Parameters

Block number to read.

Use web3.eth.block_number for the last block.

Returns

The vault value in underlyinh token

Return type

decimal.Decimal

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]

fetch_vault_info()

Get all information we can extract from the vault smart contracts.

Return type: eth_defi.erc_4626.vault.ERC4626VaultInfo

property flow_manager: eth_defi.vault.base.VaultFlowManager: Flow manager associated with this vault

get_deposit_manager_capability()

Declare the exact generic ERC-4626 implementation’s two-way flow.

Subclasses need exact-type inclusion in CERTIFIED_SYNCHRONOUS_DEPOSIT_MANAGER_CLASSES. The guarded probe may separately use supports_generic_deposit_manager() as a temporary fallback without advertising it as public metadata.

Returns: Synchronous two-way capability for the exact base class, otherwise None.
Return type: Optional[eth_defi.vault.deposit_redeem.VaultDepositManagerCapability]

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.

Override to add status flags
Also add flags from our manual flag list in eth_defi.vault.flag

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.

Only supported if has_block_range_event_support() is True

Return type: eth_defi.vault.base.VaultFlowManager

get_historical_reader(stateful)

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_notes()

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

Return type: Optional[str]

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_share_price_source()

Return the standard ERC-4626 share-price source.

ERC-4626 prices are calculated from vault accounting values read at a specific block, including protocol-specific overrides that expose the same state through another contract view.

Returns: Smart-contract state source.
Return type: eth_defi.vault.price_source.PriceSource

get_synchronous_deposit_manager_capability()

Build static metadata for a verified synchronous manager.

A caller must already have established the reader class’ guarded fork evidence. This deliberately performs no RPC reads: the capability is static library metadata, not a live vault availability check.

Returns: Synchronous two-way capability.
Return type: eth_defi.vault.deposit_redeem.VaultDepositManagerCapability

get_whitelist_notes()

Return an export caveat for the vault-wide whitelist status.

Adapters may attach a concise, stable explanation when a classification is an explicitly requested operating assumption or excludes an integration-specific permission mechanism. The note describes the policy classification only; it must not be used to report temporary deposit availability.

Returns: Export note, or None when the classification needs no caveat.
Return type: Optional[str]

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_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.vault.base.VaultInfo

Get info dictionary related to this vault deployment.

Get cached data on the various vault parameters

Returns: Vault protocol specific information dictionary

is_account_whitelisted(address)

Determine whether an account has completed the vault’s KYC policy.

The result concerns KYC or manual identity-approval membership only. A protocol may still require scheduling, a token balance, an allowance, available capacity, or an open epoch before a deposit can be submitted. Callers must use the relevant deposit manager pre-flight before broadcasting a transaction.

Parameters: address (eth_typing.evm.HexAddress) – Account whose deposit-policy membership is queried.
Returns: True when the account has the required KYC/identity approval.
Raises: NotImplementedError – If the adapter cannot safely query account membership.
Return type: bool

is_valid()

Check if this vault is valid.

Call a known smart contract function to verify the function exists

Return type: bool

is_whitelisted_deposit()

Determine whether deposits require KYC or identity approval.

Protocol adapters override this predicate only when the deployed contract version has verified implementation source or a canonical application ABI that proves a reliable vault-wide policy read. An explicitly documented operating assumption may also override it, but must set whitelist_notes so consumers can distinguish it from a source-proven result. True means the vault requires KYC or comparable manual identity approval; False means its policy is permissionless. An open date, lock-up, epoch, pause, cap, token balance, or other non-identity eligibility condition must not affect the result. A source-proven override requires a fixed-block adapter test for every supported implementation generation. An operating assumption requires a unit test that asserts both its classification and its caveat. This is independent of a caller’s current balance, allowance, pause state, capacity, and request lifecycle.

Returns: True when deposits require KYC/identity approval and False when they do not.
Raises: NotImplementedError – If the adapter cannot safely determine the policy.
Return type: bool

property name: str: Vault name.

property share_token: eth_defi.token.TokenDetails

ERC-20 that presents vault shares.

User gets shares on deposit and burns them on redemption

supports_generic_deposit_manager()

Check whether the live vault exposes the standard ERC-4626 surface.

This is deliberately an interface check, not a public support claim. Callers must still execute a guarded fork probe before relying on the generic manager for a protocol-specific adapter.

Returns: True when asset succeeds with a non-zero asset address. Deposit and redemption availability is established only by a guarded fork transaction, not by ERC-4626 max* advisory values.
Return type: bool

property symbol: str: Vault share token symbol

property underlying_token: eth_defi.token.TokenDetails: Alias for denomination_token()

property vault_contract: web3.contract.contract.Contract: Get vault deployment.