EulerVaultHistoricalReader

Documentation for eth_defi.erc_4626.vault_protocol.euler.vault.EulerVaultHistoricalReader Python class.

class EulerVaultHistoricalReader

Bases: eth_defi.erc_4626.vault.ERC4626HistoricalReader

Read Euler EVK vault core data + utilisation metrics.

For EVK vaults: - cash() = underlying tokens currently held by vault - totalBorrows() = outstanding borrows including accrued interest - Utilisation = totalBorrows / (cash + totalBorrows)

Attributes summary

address
first_block
one_raw_share

Methods summary

__init__(vault, stateful)
construct_core_erc_4626_multicall()	Polling endpoints defined in ERC-4626 spec.
construct_multicalls()	Get the onchain calls that are needed to read the share price.
construct_utilisation_calls()	Add Euler EVK-specific utilisation calls.
dictify_multicall_results(block_number, ...)	Convert batch of multicalls made for this vault to more digestible dict.
get_warmup_calls()	Yield warmup calls for Euler EVK vaults.
process_core_erc_4626_result(call_by_name)	Decode common ERC-4626 calls.
process_result(block_number, timestamp, ...)	Process the result of mult
process_utilisation_result(call_by_name)	Decode Euler EVK utilisation data.
should_skip_call(function_name)	Check if a specific function call should be skipped.

get_warmup_calls()

Yield warmup calls for Euler EVK vaults.

Includes base ERC-4626 calls plus Euler-specific utilisation calls.

Return type

Iterable[tuple[str, callable, any]]

construct_multicalls()

Get the onchain calls that are needed to read the share price.

Return type

Iterable[eth_defi.event_reader.multicall_batcher.EncodedCall]

construct_utilisation_calls()

Add Euler EVK-specific utilisation calls.

Return type

Iterable[eth_defi.event_reader.multicall_batcher.EncodedCall]

process_utilisation_result(call_by_name)

Decode Euler EVK utilisation data.

Utilisation = totalBorrows / (cash + totalBorrows)

Parameters

call_by_name (dict[str, eth_defi.event_reader.multicall_batcher.EncodedCallResult]) –

Return type

tuple[decimal.Decimal | None, float | None]

process_result(block_number, timestamp, call_results)

Process the result of mult

• Calls are created in construct_multicalls()

• This method combines result of this calls to a easy to manage historical record VaultHistoricalRead

Parameters

• block_number (int) –

• timestamp (datetime.datetime) –

• call_results (list[eth_defi.event_reader.multicall_batcher.EncodedCallResult]) –

Return type

eth_defi.vault.base.VaultHistoricalRead

__init__(vault, stateful)

Parameters

• vault (eth_defi.erc_4626.vault.ERC4626Vault) –

• stateful (bool) –

construct_core_erc_4626_multicall()

Polling endpoints defined in ERC-4626 spec.

• Does not include fee calls which do not have standard

Return type

Iterable[eth_defi.event_reader.multicall_batcher.EncodedCall]

dictify_multicall_results(block_number, call_results, allow_failure=True)

Convert batch of multicalls made for this vault to more digestible dict.

• Assert that all multicalls succeed

Returns

Dictionary where each multicall is keyed by its EncodedCall.extra_data["function"]

Parameters

• block_number (int) –

• call_results (list[eth_defi.event_reader.multicall_batcher.EncodedCallResult]) –

Return type

dict[str, eth_defi.event_reader.multicall_batcher.EncodedCallResult]

process_core_erc_4626_result(call_by_name)

Decode common ERC-4626 calls.

Parameters

call_by_name (dict[str, eth_defi.event_reader.multicall_batcher.EncodedCallResult]) –

Return type

tuple

should_skip_call(function_name)

Check if a specific function call should be skipped.

Uses the reader state’s call_status map if available.

Parameters

function_name (str) – The function name to check

Returns

True if the call should be skipped

Return type

bool