timestampof when the acc was last updated
priceAccwhich is the actual accumulator of the pair price. The price accumulator is factored into two numbers:
price: 182 bits =~ 6.13 * 10^54, so we have a huge range of possible prices even given the fact that prices will always be scaled to 10^18.
priceMultiplier: instead of storing the
priceAccdirectly in a 214 bit-word we factor it into two components, the
priceAcc = price * priceMultiplier.The reason for this is that while the accumulated price is only useful when two timestamps are taken into consideration for a TWAP, having the instant price information available can be extremely valuable for some use cases.