SyncModel#

API documentation for tradeexecutor.strategy.sync_model.SyncModel Python class in Trading Strategy framework.

class SyncModel[source]#

Bases: ABC

Abstract class for syncing on-chain fund movements event to the strategy treasury.

__init__()#

Methods

__init__()

create_transaction_builder()

Creates a transaction builder instance to make trades against this asset management model.

fetch_onchain_balances(assets[, ...])

Read the on-chain asset details.

get_hot_wallet()

Get the vault address we are using.

get_token_storage_address()

Get the address where tokens are stored.

get_vault_address()

Get the vault address we are using.

is_ready_for_live_trading(state)

Check that the state and sync model is ready for live trading.

reset_deposits(state)

Clear out pending withdrawals/deposits events.

resync_nonce()

Re-read hot wallet nonce before trade execution.

sync_initial(state, **kwargs)

Initialize the vault connection.

sync_interests(timestamp, state, universe, ...)

Update interest on all tokens that receive interest thru rebase.

sync_treasury(strategy_cycle_ts, state[, ...])

Apply the balance sync before each strategy cycle.
get_vault_address()[source]#

Get the vault address we are using.

Returns:

None if the strategy is not vaulted

Return type:

Optional[str]

get_hot_wallet()[source]#

Get the vault address we are using.

Returns:

None if the executor is not using hot wallet (dummy, backtesting, etc.)

Return type:

Optional[HotWallet]

resync_nonce()[source]#

Re-read hot wallet nonce before trade execution.

Ensures that if the private key is used outside the trade executor, we are not getting wrong nonce error when broadcasting the transaction.

is_ready_for_live_trading(state)[source]#

Check that the state and sync model is ready for live trading.

Parameters:

state (State) –

Return type:

bool

abstract get_token_storage_address()[source]#

Get the address where tokens are stored.

Returns:

Vault address for enzyme, wallet address for hot wallet.

Return None for DummySyncModel e.g. in the case of unit and backtests.

Return type:

Optional[str]

abstract sync_initial(state, **kwargs)[source]#

Initialize the vault connection.

Parameters:

  • kwargs –

    Extra hints for the initial sync.

    Because reading event from Ethereum blockchain is piss poor mess.

  • state (State) –

abstract sync_treasury(strategy_cycle_ts, state, supported_reserves=None, end_block=None)[source]#

Apply the balance sync before each strategy cycle.

Parameters:

  • strategy_cycle_ts (datetime) –

    The current strategy cycle.

    Resevers are synced before executing the strategy cycle.

  • state (State) – Current state of the execution.

  • supported_reverses –

    List of assets the strategy module wants to use as its reserves.

    May be None in testing.

  • end_block (int | None) – Sync until this block.

  • supported_reserves (Optional[List[AssetIdentifier]]) –

Returns:

List of balance updates detected.

  • Deposits

  • Redemptions

Return type:

List[BalanceUpdate]

abstract fetch_onchain_balances(assets, filter_zero=True, block_identifier=None)[source]#

Read the on-chain asset details.

  • Mark the block we are reading at the start

  • Asset list is sorted to be by address to make sure the return order is deterministic

Parameters:

  • filter_zero – Do not return zero balances

  • 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]) – Cbeck at certain block height.

  • assets (Collection[AssetIdentifier]) –

Returns:

Iterator for assets by the sort order.

Return type:

Iterable[OnChainBalance]

abstract create_transaction_builder()[source]#

Creates a transaction builder instance to make trades against this asset management model.

Only needed when trades are being executed.

Returns:

Depending on the asset management mode.

Return type:

Optional[TransactionBuilder]

sync_interests(timestamp, state, universe, pricing_model)[source]#

Update interest on all tokens that receive interest thru rebase.

  • Credit supply positions: aToken

  • Short positions: aToken, vToken

Parameters:

  • timestamp (datetime) –

    Wall clock time.

    This function can be called outside the strategy cycle.

  • state (State) – Current strategy state

  • universe (TradingStrategyUniverse) – Trading universe that must include lending data.

  • pricing_model (PricingModel) – Used to re-value loans

Returns:

All triggered balance update events, one per asset per position

Return type:

List[BalanceUpdate]

reset_deposits(state)[source]#

Clear out pending withdrawals/deposits events.

Parameters:

state (State) –