Fixed8DecodeString parses s which must be a fixed point number with precision up to 10^-8.

NewFixed8 returns a new Fixed8 with the supplied int multiplied by 10^8.

timestamp is from time.Unix().

Fixed8Decimals represents 10^precision (100000000), a value of 1 in Fixed8 format.

FixedSizeRing is well-designed for the scenario that we always push elements back and never pop elements If the ring is full, the newly pushed elements will override the oldest elements.

Fixed8 represents a fixed-point number with precision 10^-8.