v1.0.0-rc.9

Interfaces

• Change the spec of oracle consultations where using a max age of 0 will return data as of the latest block, straight from the source

Oracles

• Improve price calculation precision of AggregatedOracle
• Add PeriodicAccumulationOracle#canUpdate that returns false when one or both of the accumulators are uninitialized
• Make PeriodicAccumulationOracle#update return true only if something was updated
• Update AggregatedOracle and PeriodicAccumulation oracle to conform to the new oracle spec

Accumulators

• Improve price calculation precision of UniswapV3PriceAccumulator
• Add observation validation logs

v1.0.0-rc.8

Interfaces

• Add IUpdateable#lastUpdateTime and IUpdateable#timeSinceLastUpdate
• Add IAccumulator to define common functions
• Remove getLastObservation and getCurrentObservation from accumulators

Accumulators

• Initialize accumulators when initializing instead of just the observation
• Validate all observations instead of only the ones after the first update
• Add AbstractAccumulator to define common logic and reduce redundancy
• Add convenience functions: changeThresholdSurpassed(address token, uint256 changeThreshold) and updateThresholdSurpassed(address token)
• Make consultations use stored observations by default, rather than returning data directly from the source
  • A maxAge of 0 allows for the consultation to return data directly from the source

Oracles

• Make PeriodicAccumulationOracle only update observation timestamp and emit Updated when it has enough information to calculate a price

Libraries

• Remove unused UniswapV2PriceAccumulator data structure

v1.0.0-rc.7

Accumulators

• Add observation validation against externally provided data (MEV and flashbot attack protection)

v1.0.0-rc.6

Interfaces

• Make IUpdateByToken#update public
• Rename IUpdateByToken to IUpdateable and replace address token with bytes memory data

Accumulators

• Remove use of pending observations

v1.0.0-rc.5

Global

• Use uint112 for prices and liquidities
• Change Updated events

Interfaces

• Add function IUpdateByToken#canUpdate

Accumulators

• Add observation validation mechanics to accumulators
• Require in-range liquidity with UniswapV3LiquidityAccumulator
• Add UniswapV2PriceAccumulator and UniswapV3PriceAccumulator
  • These use spot prices rather than Uniswap's own oracle mechanics
• Make price accumulators report a price of 1 when it's in-fact 0
• Make PriceAccumulator implement IPriceOracle
• Make LiquidityAccumulator implement ILiquidityOracle

Oracles

• Make AggregatedOracle more strict with the age of underlying oracles' consultations
• Remove UniswapV2Oracle and UniswapV3Oracle

Libraries

• Upgrade FullMath to use solc v0.8.11
• Remove Uniswap library contracts other than FullMath

Utils

• Add SimpleQuotationMetadata and ExplicitQuotationMetadata

v1.0.0-rc.4

• Make accumulator data public
• Improve manipulation resistance of accumulators

v1.0.0-rc.3

• Fixes some function state modifiers (set to view)

v1.0.0-rc.2

• Implements ERC 165
• Introduces IPeriodic, IHasPriceAccumulator, and IHasLiquidityAccumulator interfaces
• More strict solc versioning

v1.0.0-rc.1

First release candidate for Pythia Core v1.0.0.

v0.0.2

This experimental release provides most of the core components of the Pythia library. Since this release is still experimental, a lot of things have changed, and nothing is set in stone yet, an overview of the changes is provided.

Changes:

Upgrade the default compiler to solc 0.8.7.
Add liquidity accumulator
Use weighted harmonic mean instead of weighted arithmetic mean in the aggregated oracle
Add liquidity oracle using a liquidity accumulator
Add prettier support
Format code
Add error catching and logging in the aggregated oracle
Add maxAge parameter in IOracle#consult
Add IUpdateByToken interface