PriceEntry

Documentation for eth_defi.price_oracle.oracle.PriceEntry Python class.

class PriceEntry

Bases: object

A single source entry for price calculations.

PriceOracle maintains a buffer of these to calculate a smoothed out price, like py:func:time_weighted_average_price.

Price entry can be sourced from:

• Manually entered price

• Price from Uniswap v2 sync events

• Price from some other event

Attributes summary

block_hash
block_number
first_seen_at_block_number
pool_contract_address
tx_hash
volume

Methods summary

__init__(timestamp, price, source[, volume, ...])
update_chain_reorg(new_entry)	Update entry data in the case of chain reorganisation.

__init__(timestamp, price, source, volume=None, pool_contract_address=None, block_number=None, tx_hash=None, block_hash=None, first_seen_at_block_number=None)

Parameters

• timestamp (datetime.datetime) –

• price (decimal.Decimal) –

• source (eth_defi.price_oracle.oracle.PriceSource) –

• volume (Optional[decimal.Decimal]) –

• pool_contract_address (Optional[str]) –

• block_number (Optional[int]) –

• tx_hash (Optional[str]) –

• block_hash (Optional[str]) –

• first_seen_at_block_number (Optional[int]) –

Return type

None

update_chain_reorg(new_entry)

Update entry data in the case of chain reorganisation.

TODO: We are not yet dealing with the situation if the transaction gets reorganisated and rejected.

Parameters

new_entry (eth_defi.price_oracle.oracle.PriceEntry) –