erc_4626.vault_protocol.lagoon.vault

Documentation for eth_defi.erc_4626.vault_protocol.lagoon.vault Python module.

Vault adapter for Lagoon Finance protocol.

Notes on active Lagoon development:

Lagoon v0.5.0 changes to the original release

Affect the vault interactions greatlty
Vault initialisation parameters changed: fee registry and wrapped native token moved from parameters payload to constructor arguments
Beacon proxy replaced with BeaconProxyFactory.createVault() patterns
pendingSilo() accessor removed, now needs a direct storage slot read
safe() accessor added

How to detect version:

Call pendingSilo(): if reverts is a new version

How to get pendingSilo(): see eth_defi.lagoon.vault.LagoonVault.silo_address().

Lagoon error code translation.

See Codeslaw page to translate custome errors to human readable

Module Attributes

`DEFAULT_LAGOON_POST_VALUATION_GAS`	How much gas we use for valuation post
`DEFAULT_LAGOON_SETTLE_GAS`	How much gas we use for valuation post
`LAGOON_V06_ACCESS_ABI`	Minimal interface for Lagoon v0.6's access-policy view.

Classes

`AutomatedSafe`	Mixin for Safe multisig wallets with TradingStrategyModuleV0 guard.
`LagoonFlowManager`	Manage deposit/redemption queue for Lagoon.
`LagoonSatelliteVault`	A satellite chain deployment: Safe + TradingStrategyModuleV0, no vault contract.
`LagoonVault`	Python interface for interacting with Lagoon Finance vaults.
`LagoonVaultInfo`	Capture information about Lagoon vault deployment.
`LagoonVersion`	Figure out Lagoon version.

DEFAULT_LAGOON_POST_VALUATION_GAS = 500000: How much gas we use for valuation post

DEFAULT_LAGOON_SETTLE_GAS = 500000: How much gas we use for valuation post

LAGOON_V06_ACCESS_ABI = [{'inputs': [{'internalType': 'address', 'name': 'account', 'type': 'address'}], 'name': 'isAllowed', 'outputs': [{'internalType': 'bool', 'name': '', 'type': 'bool'}], 'stateMutability': 'view', 'type': 'function'}]

Minimal interface for Lagoon v0.6’s access-policy view.

Canonical source: https://github.com/hopperlabsxyz/lagoon-v0/blob/a8e73f5a5276aa4047b901083cbce127d7f7b470/src/v0.6.0/Accessable.sol

class LagoonVaultInfo

Bases: eth_defi.vault.base.VaultInfo

Capture information about Lagoon vault deployment.

asset: eth_typing.evm.HexAddress: The ERC-20 token that nominates the vault assets

safe: eth_typing.evm.HexAddress: Lagoon vault deployment info

whitelistManager: eth_typing.evm.HexAddress: Lagoon vault deployment info

feeReceiver: eth_typing.evm.HexAddress: Lagoon vault deployment info

feeRegistry: eth_typing.evm.HexAddress: Lagoon vault deployment info

valuationManager: eth_typing.evm.HexAddress: Lagoon vault deployment info

address: eth_typing.evm.ChecksumAddress: Safe multisig core info

fallback_handler: eth_typing.evm.ChecksumAddress: Safe multisig core info

guard: eth_typing.evm.ChecksumAddress: Safe multisig core info

master_copy: eth_typing.evm.ChecksumAddress: Safe multisig core info

modules: list[eth_typing.evm.ChecksumAddress]: Safe multisig core info

nonce: int: Safe multisig core info

owners: list[eth_typing.evm.ChecksumAddress]: Safe multisig core info

threshold: int: Safe multisig core info

version: str: Safe multisig core info

__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.

class LagoonVersion

Bases: enum.Enum

Figure out Lagoon version.

class AutomatedSafe

Bases: object

Mixin for Safe multisig wallets with TradingStrategyModuleV0 guard.

Provides transaction wrapping through the guard module, used by both full Lagoon vaults (LagoonVault) and satellite Safe-only deployments (LagoonSatelliteVault).

Encapsulates Safe + TradingStrategyModuleV0 interaction
Independent of vault contracts (no ERC-4626 dependency)

Parameters

web3 – Web3 connection to the chain where the Safe is deployed.
safe_address – Address of the Gnosis Safe multisig. Can be None for LagoonVault where it is lazily resolved from the vault contract.
trading_strategy_module_address – Address of the TradingStrategyModuleV0 guard module enabled on the Safe.

__init__(web3, safe_address=None, trading_strategy_module_address=None)

Parameters

web3 (web3.main.Web3) – Web3 connection to the chain where the Safe is deployed.
safe_address (Optional[eth_typing.evm.HexAddress]) – Address of the Gnosis Safe multisig. Can be None for LagoonVault where it is lazily resolved from the vault contract.
trading_strategy_module_address (Optional[eth_typing.evm.HexAddress]) – Address of the TradingStrategyModuleV0 guard module enabled on the Safe.

property safe_address: eth_typing.evm.HexAddress: Get Safe multisig contract address.

property trading_strategy_module_address: Optional[eth_typing.evm.HexAddress]: Get TradingStrategyModuleV0 contract address.

fetch_safe(address)

Create a Safe object from an address.

Use safe property for cached access.

Parameters: address (Union[eth_typing.evm.HexAddress, str]) –
Return type: safe_eth.safe.safe.Safe

property safe: safe_eth.safe.safe.Safe

Get the underlying Safe object used as an API from safe-eth-py library.

Wraps Safe contract using Gnosis’s in-house library

property safe_contract: web3.contract.contract.Contract

Safe multisig as a contract.

Interact with Safe multisig ABI

property trading_strategy_module: web3.contract.contract.Contract: Get the TradingStrategyModuleV0 contract instance.

fetch_trading_strategy_module_version()

Perform deployed smart contract probing.

Returns

v0.1.0 or v0.1.1.

None if not TS module associated.

Return type

Optional[str]

property trading_strategy_module_version: str

Get TradingStrategyModuleV0 contract ABI version.

Subject to change, development in progress

transact_via_exec_module(func_call, value=0, operation=0)

Create a multisig transaction using a module.

Calls execTransactionFromModule on Gnosis Safe contract
Executes a transaction as a multisig
Mostly used for testing w/whitelist ignore

Warning

A special gas fix is needed, because eth_estimateGas seems to fail for these Gnosis Safe transactions.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH attached to the transaction
operation –
Gnosis enum.

Call = 0, DelegateCall = 1.

Return type

web3.contract.contract.ContractFunction

transact_via_trading_strategy_module(func_call, value=0, abi_version=None)

Create a Safe multisig transaction using TradingStrategyModuleV0.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH value attached to the call.
abi_version (str) – Use specific TradingStrategyModuleV0 ABI version.

Returns

Bound Solidity function call you need to turn to a transaction

Return type

web3.contract.contract.ContractFunction

class LagoonSatelliteVault

Bases: eth_defi.erc_4626.vault_protocol.lagoon.vault.AutomatedSafe

A satellite chain deployment: Safe + TradingStrategyModuleV0, no vault contract.

Used on chains that only receive bridged assets and execute trades, without deposit/redemption infrastructure (no ERC-4626 vault).

Parameters

web3 – Web3 connection to the chain where the Safe is deployed.
safe_address – Address of the Gnosis Safe multisig. Can be None for LagoonVault where it is lazily resolved from the vault contract.
trading_strategy_module_address – Address of the TradingStrategyModuleV0 guard module enabled on the Safe.

__init__(web3, safe_address, trading_strategy_module_address)

Parameters

web3 (web3.main.Web3) – Web3 connection to the chain where the Safe is deployed.
safe_address (eth_typing.evm.HexAddress) – Address of the Gnosis Safe multisig. Can be None for LagoonVault where it is lazily resolved from the vault contract.
trading_strategy_module_address (eth_typing.evm.HexAddress) – Address of the TradingStrategyModuleV0 guard module enabled on the Safe.

property web3: web3.main.Web3: Get Web3 connection for this satellite chain.

fetch_safe(address)

Create a Safe object from an address.

Use safe property for cached access.

Parameters: address (Union[eth_typing.evm.HexAddress, str]) –
Return type: safe_eth.safe.safe.Safe

fetch_trading_strategy_module_version()

Perform deployed smart contract probing.

Returns

v0.1.0 or v0.1.1.

None if not TS module associated.

Return type

Optional[str]

property safe: safe_eth.safe.safe.Safe

Get the underlying Safe object used as an API from safe-eth-py library.

Wraps Safe contract using Gnosis’s in-house library

property safe_address: eth_typing.evm.HexAddress: Get Safe multisig contract address.

property safe_contract: web3.contract.contract.Contract

Safe multisig as a contract.

Interact with Safe multisig ABI

property trading_strategy_module: web3.contract.contract.Contract: Get the TradingStrategyModuleV0 contract instance.

property trading_strategy_module_address: Optional[eth_typing.evm.HexAddress]: Get TradingStrategyModuleV0 contract address.

property trading_strategy_module_version: str

Get TradingStrategyModuleV0 contract ABI version.

Subject to change, development in progress

transact_via_exec_module(func_call, value=0, operation=0)

Create a multisig transaction using a module.

Calls execTransactionFromModule on Gnosis Safe contract
Executes a transaction as a multisig
Mostly used for testing w/whitelist ignore

Warning

A special gas fix is needed, because eth_estimateGas seems to fail for these Gnosis Safe transactions.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH attached to the transaction
operation –
Gnosis enum.

Call = 0, DelegateCall = 1.

Return type

web3.contract.contract.ContractFunction

transact_via_trading_strategy_module(func_call, value=0, abi_version=None)

Create a Safe multisig transaction using TradingStrategyModuleV0.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH value attached to the call.
abi_version (str) – Use specific TradingStrategyModuleV0 ABI version.

Returns

Bound Solidity function call you need to turn to a transaction

Return type

web3.contract.contract.ContractFunction

class LagoonVault

Bases: eth_defi.erc_7540.vault.ERC7540Vault, eth_defi.erc_4626.vault_protocol.lagoon.vault.AutomatedSafe

Python interface for interacting with Lagoon Finance vaults.

For information see VaultBase base class documentation.

Example vault: https://basescan.org/address/0x6a5ea384e394083149ce39db29d5787a658aa98a#readContract

Notes

Vault contract knows about Safe, Safe does not know about the Vault
Ok so for settlement you dont have to worry about this metric, the only thing you have to value is the assets inside the safe (what you currently have under management) and update the NAV of the vault by calling updateNewTotalAssets (ex: if you have 1M inside the vault and 500K pending deposit you only need to call updateTotalAssets with the 1M that are currently inside the safe). Then, to settle you just call settleDeposit and the vault calculate everything for you.
To monitor the pending deposits it’s a bit more complicated. You have to check the balanceOf the pendingSilo contract (0xAD1241Ba37ab07fFc5d38e006747F8b92BB217D5) in term of underlying (here USDC) for pending deposit and in term of shares (so the vault itself) for pending withdraw requests

Lagoon tokens can be in

Safe: Tradeable assets
Silo: pending deposits (USDC)
Vault: pending redemptions (USDC)
User wallets: after deposit() have been called share tokens are moved to the user wallet

Parameters

spec – Address must be Lagoon vault address (not Safe address)
trading_strategy_module_address –
TradingStrategyModuleV0 enabled on Safe for automated trading.

If not given, not known.
vault_abi –
ABI filename we use.

Lagoon has different versions.

None = autodetect.
default_block_identifier –
Override block identifier for on-chain metadata reads.

See ERC4626Vault for details.

__init__(web3, spec, trading_strategy_module_address=None, token_cache=None, vault_abi=None, features=None, default_block_identifier=None, **kwargs)

Parameters

spec (eth_defi.vault.base.VaultSpec) – Address must be Lagoon vault address (not Safe address)
trading_strategy_module_address (Optional[eth_typing.evm.HexAddress]) –
TradingStrategyModuleV0 enabled on Safe for automated trading.

If not given, not known.
vault_abi (Optional[str]) –
ABI filename we use.

Lagoon has different versions.

None = autodetect.
default_block_identifier (Optional[Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]]) –
Override block identifier for on-chain metadata reads.

See ERC4626Vault for details.
web3 (web3.main.Web3) –
token_cache (Optional[dict]) –
features (set[eth_defi.erc_4626.core.ERC4626Feature]) –

fetch_version()

Figure out Lagoon version.

Poke the smart contract with probe functions to get version
Specifically call pendingSilo() that has been removed because the contract is too big
Our ABI definitions and callign conventions change between Lagoon versions

Return type: eth_defi.erc_4626.vault_protocol.lagoon.vault.LagoonVersion

check_version_compatibility(): Throw if there is mismatch between ABI and contract exposed EVM calls

property version: eth_defi.erc_4626.vault_protocol.lagoon.vault.LagoonVersion

Get Lagoon version.

Cached property to avoid multiple calls

property lagoon_metadata: Optional[eth_defi.erc_4626.vault_protocol.lagoon.offchain_metadata.LagoonVaultMetadata]

Offchain metadata from Lagoon’s web app API.

Fetched from app.lagoon.finance/api/vault endpoint
Cached on first access
Returns None if vault is not in Lagoon’s app database

property description: Optional[str]: Full vault strategy description from Lagoon’s offchain metadata.

property short_description: Optional[str]: Short one-liner vault summary from Lagoon’s offchain metadata.

property manager_name: Optional[str]: Lagoon curator names from Lagoon’s offchain vault API.

get_flags()

Get vault flags, auto-flagging vaults missing from Lagoon’s frontend.

If the vault has no metadata in Lagoon’s API, it is flagged as unofficial
Manual flags from VAULT_FLAGS_AND_NOTES take precedence

Return type: set[eth_defi.vault.flag.VaultFlag]

get_notes()

Get notes for this vault.

Returns manual notes from the vault flags if set
If vault is missing from Lagoon’s frontend, returns the missing note
Otherwise falls back to the full description from Lagoon’s offchain metadata

Return type: Optional[str]

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

property whitelist_contract: web3.contract.contract.Contract

Get the stable whitelist interface at the vault address.

Lagoon’s version-specific vault ABIs do not consistently include the inherited whitelist views. The shared interface contains both selectors and can be safely bound to every Lagoon vault deployment. Unsupported selectors are translated to NotImplementedError by the public accessors below.

property access_contract: web3.contract.contract.Contract

Get Lagoon v0.6’s isAllowed(address) access interface.

Lagoon v0.6 replaced Whitelistable with the canonical Accessable contract. This is versioned source on the upstream main branch; the pinned revision did not have a v0.6.0 GitHub release or tag. The one-function interface is bound separately because the repository intentionally continues to use the compatible v0.5 vault ABI for general v0.6 reads.

Returns: Contract proxy exposing isAllowed(address).

is_whitelisted_deposit()

Determine whether a Lagoon vault uses whitelist-mode deposits.

Lagoon released isWhitelistActivated() in v0.3.0 and retained it in the canonical v0.4.0 Whitelistable source. The getter was removed from the v0.5.0 Whitelistable source, despite isWhitelisted(address) remaining available. For v0.5 deployments only, use the zero-address sentinel: its False result means whitelist enforcement is active, while True means deposits are permissionless. This follows the v0.5 implementation’s isWhitelisted branch for a disabled whitelist.

Lagoon v0.6 replaces Whitelistable with an access layer supporting whitelist mode, blacklist mode and an external sanctions oracle. Its canonical AccessableLib.isAllowed implementation returns False for the zero address in whitelist mode and True under the default-open blacklist mode. Therefore v0.6 uses isAllowed(0x0) as its version-specific sentinel. Individual account admission must still be checked separately because blacklist and sanctions rules may deny an otherwise default-open account.

Returns: True when the vault uses whitelist mode.
Raises: NotImplementedError – If the deployed Lagoon version exposes neither the policy getter nor its version-specific account-access fallback.
Return type: bool

is_account_whitelisted(address)

Determine whether an account passes Lagoon’s versioned access view.

In the versioned v0.5 implementation, the canonical isWhitelisted source returns True for every account when the whitelist is disabled and returns mapping membership when it is active. Thus this probe is a reliable whitelist-admission result even where the v0.5 deployment lacks isWhitelistActivated(). It does not establish allowance, capacity, pause state, or an open ERC-7540 request window.

Lagoon v0.6 instead calls isAllowed(address). The canonical versioned AccessableLib implementation combines whitelist or blacklist mode with an optional external sanctions oracle. Thus this method’s historical name means “admitted by Lagoon’s access policy” for v0.6. The pinned upstream revision did not have a v0.6.0 GitHub release or tag.

Parameters: address (eth_typing.evm.HexAddress) – Account whose access status is queried.
Returns: True when Lagoon’s versioned access policy accepts the account.
Raises: NotImplementedError – If the deployed Lagoon version does not expose its expected access getter.
Return type: bool

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

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.erc_4626.vault_protocol.lagoon.vault.LagoonFlowManager

fetch_vault_info()

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

Return type: dict

fetch_info()

Use info() property for cached access.

Returns: See LagoonVaultInfo
Return type: eth_defi.erc_4626.vault_protocol.lagoon.vault.LagoonVaultInfo

property safe_address: eth_typing.evm.HexAddress: Get Safe multisig contract address

property safe: safe_eth.safe.safe.Safe

Get the underlying Safe object used as an API from safe-eth-py library.

Warps Safe Contract using Gnosis’s in-house library

property safe_contract: web3.contract.contract.Contract

Safe multisig as a contract.

Interact with Safe multisig ABI

property valuation_manager: eth_typing.evm.HexAddress: Valuation manager role on the vault.

property silo_address: eth_typing.evm.HexAddress

Pending Silo contract address.

Returns: Checksummed Silo contract addrewss “pendingSilo”.

property silo_contract: web3.contract.contract.Contract

Pending Silo contract.

This contract does not have any functionality, but stores deposits (pending USDC) and redemptions (pending share token)

post_new_valuation(total_valuation)

Update the valuations of this vault.

Lagoon vault does not currently track individual positions, but takes a “total value” number
Updating this number also allows deposits and redemptions to proceed

Notes:

How can I post a valuation commitee update 1. as the valuationManager, call the function updateNewTotalAssets(_newTotalAssets) _newTotalAssets being expressed in underlying in its smallest unit for usdc, it would with its 6 decimals. Do not take into account requestDeposit and requestRedeem in your valuation

as the safe, call the function settleDeposit()

Parameters: total_valuation (decimal.Decimal) – The vault value nominated in denomination_token().
Returns: Bound contract function that can be turned to a transaction
Return type: web3.contract.contract.ContractFunction

settle_via_trading_strategy_module(valuation=None, abi_version=None)

Settle the new valuation and deposits.

settleDeposit will also settle the redeems request if possible. If there are enough assets in the safe it will settleRedeem It there are not enough assets, it will only settleDeposit.
if there is nothing to settle: no deposit and redeem requests you can still call settleDeposit/settleRedeem to validate the new nav
If there is not enough USDC to redeem, the transaction will revert

Parameters

abi_version (None) – Use specific ABI version.
raw_amount – Needed in Lagoon v0.5+
valuation (decimal.Decimal) –

Return type

web3.contract.contract.ContractFunction

post_valuation_and_settle(valuation, asset_manager, gas=1000000)

Do both new valuation and settle.

Quickhand method for asset_manager code
Only after this we can read back
Broadcasts two transactions and waits for the confirmation
If there is not enough USDC to redeem, the second transaction will fail with revert

Returns

The transaction hash of the settlement transaction

Parameters

valuation (decimal.Decimal) –
asset_manager (eth_typing.evm.HexAddress) –

Return type

hexbytes.main.HexBytes

get_management_fee(block_identifier)

Get Lagoon vault rates

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_performance_fee(block_identifier)

Get Lagoon vault rates

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

is_trading_strategy_module_enabled()

Check if TradingStrategyModuleV0 is enabled on the Safe multisig.

Return type: bool

get_deposit_manager()

Create Lagoon’s ERC-7540 deposit manager.

Lagoon uses the generic ERC-7540 lifecycle with protocol-specific access-policy checks and an Anvil settlement driver.

Returns: Lagoon-specific extension of the generic ERC-7540 manager.
Return type: LagoonDepositManager

get_deposit_manager_capability()

Declare Lagoon’s asynchronously settleable manager lifecycle.

Lagoon accepts the standard ERC-7540 request types and its selected manager can force-settle both ticket directions on Anvil.

Note

Trade-executor may call force_settle() for a full-lifecycle simulation only when this capability flag is true and it holds the matching ERC-7540 request ticket. Request-only behaviour remains unchanged.

Returns: Two-way asynchronous capability with Anvil settlement support.
Return type: eth_defi.vault.deposit_redeem.VaultDepositManagerCapability

can_check_deposit()

Lagoon’s maxDeposit does not work correctly for deposit availability checks.

Return type: bool

get_link(referral=None)

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

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

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_closed_reason()

Check if deposits are closed using maxDeposit(address(0)).

Uses the ERC-4626 standard maxDeposit function to determine if deposits are available. Returns a human-readable reason with the max deposit amount if deposits are restricted.

Returns: Human-readable string if deposits are closed/restricted, or None if deposits are open (maxDeposit > 0).
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_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_closed_reason()

Check if redemptions are closed using maxRedeem(address(0)).

Only works for protocols that implement maxRedeem in a way that returns meaningful values for address(0). Most protocols return 0 because address(0) has no shares, not because redemptions are closed.

Returns: Human-readable string if redemptions are closed, or None if redemptions are open or check is not supported.
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_safe(address)

Create a Safe object from an address.

Use safe property for cached access.

Parameters: address (Union[eth_typing.evm.HexAddress, str]) –
Return type: safe_eth.safe.safe.Safe

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_trading_strategy_module_version()

Perform deployed smart contract probing.

Returns

v0.1.0 or v0.1.1.

None if not TS module associated.

Return type

Optional[str]

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]

finalise_deposit(depositor, raw_amount=None)

Build the transaction that claims settled deposit shares.

This is phase two of an asynchronous deposit. The three-argument ERC-7540 deposit(assets, receiver, controller) call uses depositor as both receiver and controller.

Parameters

depositor (eth_typing.evm.HexAddress) – Request controller and share receiver.
raw_amount (Optional[int]) – Settled underlying assets to claim. When omitted, use maxDeposit(depositor).

Returns

Bound ERC-7540 deposit-claim function.

Return type

web3.contract.contract.ContractFunction

finalise_redeem(depositor, raw_amount=None)

Build the transaction that claims settled redemption assets.

This is phase two of an asynchronous redemption. The three-argument ERC-7540 redeem(shares, receiver, controller) call uses depositor as both receiver and controller.

Parameters

depositor (eth_typing.evm.HexAddress) – Request controller and underlying-token receiver.
raw_amount (Optional[int]) – Settled shares to claim in raw units. When omitted, use maxRedeem(depositor).

Returns

Bound ERC-7540 redemption-claim function.

Return type

web3.contract.contract.ContractFunction

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_estimated_lock_up()

Return an unknown operator-controlled ERC-7540 lock-up.

ERC-7540 standardises request state, but not the operator’s settlement schedule. A generic adapter therefore cannot provide a duration.

Returns: None because no generic lock-up estimate exists.
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_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_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_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_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_custom_fees()

Does this vault have fees outside the shared fee model.

Custom fees cause risk in vault comparison because the shared management/performance/deposit/withdraw fee fields cannot describe the full fee structure.

Do not return True merely because a vault implements custom accessors for ordinary management, performance, deposit, or withdraw fees. Return True only when some vault fee cannot be reflected in those standard fields as a fee-like value.

Returns: True if the vault has fees outside the shared fee model.
Return type: bool

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_valid()

Check if this vault is valid.

Call a known smart contract function to verify the function exists

Return type: bool

property name: str: Vault name.

request_deposit(depositor, raw_amount, check_allowance=True, check_balance=True)

Build a deposit transaction.

This is phase one of the asynchronous ERC-7540 flow. The depositor must hold enough underlying tokens and approve the vault unless the corresponding checks are disabled.

Note

Legacy. Use get_deposit_manager() instead.

Parameters

depositor (eth_typing.evm.HexAddress) – Token owner and request controller.
raw_amount (int) – Underlying-token amount in raw units.
check_allowance – Check that the vault can transfer raw_amount from the depositor.
check_balance – Check that the depositor owns at least raw_amount.

Returns

Bound requestDeposit contract function.

Return type

web3.contract.contract.ContractFunction

request_redeem(depositor, raw_amount, check_enough_token=True)

Build a redemption-request transaction.

This is phase one of the asynchronous ERC-7540 redemption flow. The depositor acts as both owner and controller.

Parameters

depositor (eth_typing.evm.HexAddress) – Share owner and request controller.
raw_amount (int) – Vault shares to redeem in raw units.
check_enough_token (bool) – Whether to verify the depositor’s current share balance. Disable only when reconstructing an already-broadcast request.

Returns

Bound requestRedeem contract function.

Return type

web3.contract.contract.ContractFunction

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 trading_strategy_module: web3.contract.contract.Contract: Get the TradingStrategyModuleV0 contract instance.

property trading_strategy_module_address: Optional[eth_typing.evm.HexAddress]: Get TradingStrategyModuleV0 contract address.

property trading_strategy_module_version: str

Get TradingStrategyModuleV0 contract ABI version.

Subject to change, development in progress

transact_via_exec_module(func_call, value=0, operation=0)

Create a multisig transaction using a module.

Calls execTransactionFromModule on Gnosis Safe contract
Executes a transaction as a multisig
Mostly used for testing w/whitelist ignore

Warning

A special gas fix is needed, because eth_estimateGas seems to fail for these Gnosis Safe transactions.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH attached to the transaction
operation –
Gnosis enum.

Call = 0, DelegateCall = 1.

Return type

web3.contract.contract.ContractFunction

transact_via_trading_strategy_module(func_call, value=0, abi_version=None)

Create a Safe multisig transaction using TradingStrategyModuleV0.

Parameters

func_call (web3.contract.contract.ContractFunction) – Bound smart contract function call
value (int) – ETH value attached to the call.
abi_version (str) – Use specific TradingStrategyModuleV0 ABI version.

Returns

Bound Solidity function call you need to turn to a transaction

Return type

web3.contract.contract.ContractFunction

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

first_seen_at_block: Optional[int]

Block number hint when this vault was deployed.

Must be set externally, as because of shitty Ethereum RPC we cannot query this. Allows us to avoid unnecessary work when scanning historical price data.

class LagoonFlowManager

Bases: eth_defi.vault.base.VaultFlowManager

Manage deposit/redemption queue for Lagoon.

Lagoon uses ERC-7540 Asynchronous ERC-4626 Tokenized Vaults for deposits and redemptions flow

On the Lagoon flow:

Ok so for settlement you dont have to worry about this metric, the only thing you have to value is the assets inside the safe (what you currently have under management) and update the NAV of the vault by calling updateNewTotalAssets (ex: if you have 1M inside the vault and 500K pending deposit you only need to call updateTotalAssets with the 1M that are currently inside the safe). Then, to settle you just call settleDeposit and the vault calculate everything for you.

To monitor the pending deposits it’s a bit more complicated. You have to check the balanceOf the pendingSilo contract (0xAD1241Ba37ab07fFc5d38e006747F8b92BB217D5) in term of underlying (here USDC) for pending deposit and in term of shares (so the vault itself) for pending withdraw requests

__init__(vault)

Parameters: vault (eth_defi.erc_4626.vault_protocol.lagoon.vault.LagoonVault) –
Return type: None

fetch_pending_redemption(block_identifier)

Get how much users want to redeem from the vault.

Parameters

Returns

Number of share tokens the users want to redeem from the vault.

Shares must be valued separately.

Return type

decimal.Decimal

fetch_pending_deposit(block_identifier)

Get how much users want to redeem from the vault.

Parameters: block_identifier (Union[Literal['latest', 'earliest', 'pending', 'safe', 'finalized'], eth_typing.evm.BlockNumber, eth_typing.evm.Hash32, eth_typing.encoding.HexStr, int]) – Block number
Returns: Number of underlying tokens the users want to redeem from the vault.
Return type: decimal.Decimal

fetch_pending_deposit_events(range)

Read incoming pending deposits.

Parameters: range (Tuple[eth_typing.evm.BlockNumber, eth_typing.evm.BlockNumber]) –
Return type: None

fetch_pending_redemption_event(range)

Read outgoing pending withdraws.

Parameters: range (Tuple[eth_typing.evm.BlockNumber, eth_typing.evm.BlockNumber]) –
Return type: None

fetch_processed_deposit_event(range)

Read incoming pending deposits.

Parameters: range (Tuple[eth_typing.evm.BlockNumber, eth_typing.evm.BlockNumber]) –
Return type: None

fetch_processed_redemption_event(vault, range)

Read outgoing pending withdraws.

Parameters

vault (eth_defi.vault.base.VaultSpec) –
range (Tuple[eth_typing.evm.BlockNumber, eth_typing.evm.BlockNumber]) –

Return type

None

calculate_underlying_needed_for_redemptions(block_identifier)

How much underlying token (USDC) we are going to need on the next redemption cycle.

Returns: Raw token amount
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: decimal.Decimal

get_estimated_lock_up()

Estimate lock up period from Lagoon’s offchain metadata.

Uses average_settlement from Lagoon’s web app API (in seconds)
Returns None if metadata is not available

Return type: Optional[datetime.timedelta]