DEFAULT_INVOCATION_COST

solana_program_runtime::execution_budget

Constant DEFAULT_INVOCATION_COST 

Source 
pub const DEFAULT_INVOCATION_COST: u64 = 1000;
👎Deprecated since 3.1.0: This crate has been marked for formal inclusion in the Agave Unstable API. From v4.0.0 onward, the agave-unstable-api crate feature must be specified to acknowledge use of an interface that may break without warning.