waffles_solana_program/sysvar/
fees.rs

1//! Current cluster fees.
2//!
3//! The _fees sysvar_ provides access to the [`Fees`] type, which contains the
4//! current [`FeeCalculator`].
5//!
6//! [`Fees`] implements [`Sysvar::get`] and can be loaded efficiently without
7//! passing the sysvar account ID to the program.
8//!
9//! This sysvar is deprecated and will not be available in the future.
10//! Transaction fees should be determined with the [`getFeeForMessage`] RPC
11//! method. For additional context see the [Comprehensive Compute Fees
12//! proposal][ccf].
13//!
14//! [`getFeeForMessage`]: https://docs.solana.com/developing/clients/jsonrpc-api#getfeeformessage
15//! [ccf]: https://docs.solana.com/proposals/comprehensive-compute-fees
16//!
17//! See also the Solana [documentation on the fees sysvar][sdoc].
18//!
19//! [sdoc]: https://docs.solana.com/developing/runtime-facilities/sysvars#fees
20
21#![allow(deprecated)]
22
23use {
24    crate::{
25        fee_calculator::FeeCalculator, impl_sysvar_get, program_error::ProgramError, sysvar::Sysvar,
26    },
27    solana_sdk_macro::CloneZeroed,
28};
29
30crate::declare_deprecated_sysvar_id!("SysvarFees111111111111111111111111111111111", Fees);
31
32/// Transaction fees.
33#[deprecated(
34    since = "1.9.0",
35    note = "Please do not use, will no longer be available in the future"
36)]
37#[repr(C)]
38#[derive(Serialize, Deserialize, Debug, CloneZeroed, Default, PartialEq, Eq)]
39pub struct Fees {
40    pub fee_calculator: FeeCalculator,
41}
42
43impl Fees {
44    pub fn new(fee_calculator: &FeeCalculator) -> Self {
45        #[allow(deprecated)]
46        Self {
47            fee_calculator: *fee_calculator,
48        }
49    }
50}
51
52impl Sysvar for Fees {
53    impl_sysvar_get!(sol_get_fees_sysvar);
54}
55
56#[cfg(test)]
57mod tests {
58    use super::*;
59
60    #[test]
61    fn test_clone() {
62        let fees = Fees {
63            fee_calculator: FeeCalculator {
64                lamports_per_signature: 1,
65            },
66        };
67        let cloned_fees = fees.clone();
68        assert_eq!(cloned_fees, fees);
69    }
70}
waffles_solana_program/sysvar/fees.rs

waffles_solana_program/sysvar/
fees.rs
