Add fixed execution cost

[vicsn]

Motivation

Adds a fixed execution cost.

Tests

Need to rewrite expectations, which can be done once we're sure when this will be merged.

Related PRs

• Updates deployment costs: https://github.com/AleoHQ/snarkVM/pull/2271
• Updates finalize costs: https://github.com/AleoHQ/snarkVM/pull/2281
• Updates snarkOS to https://github.com/AleoHQ/snarkVM/pull/2271

[ljedrz]

Left one suggestion.

[iamalwaysuncomfortable]

One further nit on providing accessor methods for end users

[iamalwaysuncomfortable]

Looks good, just needs accessor methods for end users, and perhaps a display method for printing it.

Suggested change

	impl ExecutionCosts {
	/// Cost for storing the execution transaction on the Aleo Network
	pub fn storage_cost() -> u64 {
	self.storage_cost
	}
	/// Cost for executing all operations within the function's finalize scope on the Aleo Network
	pub fn finalize_cost() -> u64 {
	self.finalize_cost
	}
	/// Cost for verification of the function execution
	pub fn execution_cost() -> u64 {
	self.storage_cost
	}
	}

[vicsn]

I feel like a rebel today: cc10cce

[howardwu]

Closing as this is not necessary at this time.