Step is a fractional unit of ICX, at the conversion rate of 100,000,000 Step = 1 ICX. This is the base unit in transaction fee calculations.

Virtual Steps are virtual ICX tokens with the sole purpose of covering transaction fees. A Virtual Step has a conversion ratio of 1:1 to Step. Any SCORE operator can stake in a SCORE to earn Virtual Steps based on the Virtual Step yield table. Virtual Steps are non-redeemable, non-transferable and non-tradable. Virtual Steps have an expiration date, and remaining Virtual Steps will be burned upon the ending day of the staking period.