aptos-gas 0.2.7

This crate is the core of the gas metering system of the Aptos blockchain. More specifically, it - Is home to the gas meter implementation - Defines the gas parameters and formulae for instructions - Defines the gas parameters for transactions - Sets the initial values for all gas parameters, including the instruction, transaction move-stdlib and aptos-framework ones. - Defines a bi-directional mapping between the (Rust) gas parameter structs and their corresponding representation on-chain. The reason why we need two different representations is that they serve different purposes: - The Rust structs are used for quick (static) lookups by the gas meter and native functions when calculating gas costs. - The on-chain gas schedule needs to be extensible and unordered so we can upgrate it easily in the future.