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//! Configuration for network [rent].
//!
//! [rent]: https://docs.solanalabs.com/implemented-proposals/rent
//!
//! The _rent sysvar_ provides access to the [`Rent`] type, which defines
//! storage rent fees.
//!
//! [`Rent`] implements [`crate::Sysvar::get`] and can be loaded efficiently without
//! passing the sysvar account ID to the program.
//!
//! See also the Solana [documentation on the rent sysvar][sdoc].
//!
//! [sdoc]: https://docs.solanalabs.com/runtime/sysvars#rent
//!
//! # Examples
//!
//! Accessing via on-chain program directly:
//!
//! ```no_run
//! # use solana_account_info::AccountInfo;
//! # use solana_msg::msg;
//! # use solana_sysvar::Sysvar;
//! # use solana_program_error::{ProgramError, ProgramResult};
//! # use solana_pubkey::Pubkey;
//! # use solana_rent::Rent;
//! # use solana_sdk_ids::sysvar::rent;
//! fn process_instruction(
//! program_id: &Pubkey,
//! accounts: &[AccountInfo],
//! instruction_data: &[u8],
//! ) -> ProgramResult {
//!
//! let rent = Rent::get()?;
//! msg!("rent: {:#?}", rent);
//!
//! Ok(())
//! }
//! #
//! # use solana_sysvar_id::SysvarId;
//! # let p = Rent::id();
//! # let l = &mut 1009200;
//! # let d = &mut vec![152, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 100];
//! # let a = AccountInfo::new(&p, false, false, l, d, &p, false);
//! # let accounts = &[a.clone(), a];
//! # process_instruction(
//! # &Pubkey::new_unique(),
//! # accounts,
//! # &[],
//! # )?;
//! # Ok::<(), ProgramError>(())
//! ```
//!
//! Accessing via on-chain program's parameters:
//!
//! ```
//! # use solana_account_info::{AccountInfo, next_account_info};
//! # use solana_msg::msg;
//! # use solana_program_error::{ProgramError, ProgramResult};
//! # use solana_pubkey::Pubkey;
//! # use solana_rent::Rent;
//! # use solana_sdk_ids::sysvar::rent;
//! #
//! fn process_instruction(
//! program_id: &Pubkey,
//! accounts: &[AccountInfo],
//! instruction_data: &[u8],
//! ) -> ProgramResult {
//! let account_info_iter = &mut accounts.iter();
//! let rent_account_info = next_account_info(account_info_iter)?;
//!
//! assert!(rent::check_id(rent_account_info.key));
//!
//! let rent: Rent = wincode::deserialize(&rent_account_info.data.borrow())
//! .map_err(|_| ProgramError::InvalidArgument)?;
//! msg!("rent: {:#?}", rent);
//!
//! Ok(())
//! }
//! #
//! # use solana_sysvar_id::SysvarId;
//! # let p = Rent::id();
//! # let l = &mut 1009200;
//! # let d = &mut vec![152, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 100];
//! # let a = AccountInfo::new(&p, false, false, l, d, &p, false);
//! # let accounts = &[a.clone(), a];
//! # process_instruction(
//! # &Pubkey::new_unique(),
//! # accounts,
//! # &[],
//! # )?;
//! # Ok::<(), ProgramError>(())
//! ```
//!
//! Accessing via the RPC client:
//!
//! ```
//! # use solana_example_mocks::solana_account;
//! # use solana_example_mocks::solana_rpc_client;
//! # use solana_account::Account;
//! # use solana_rent::Rent;
//! # use solana_rpc_client::rpc_client::RpcClient;
//! # use solana_sdk_ids::sysvar::rent;
//! # use anyhow::Result;
//! #
//! fn print_sysvar_rent(client: &RpcClient) -> Result<()> {
//! # client.set_get_account_response(rent::ID, Account {
//! # lamports: 1009200,
//! # data: vec![152, 13, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 64, 100],
//! # owner: solana_sdk_ids::system_program::ID,
//! # executable: false,
//! # });
//! #
//! let rent = client.get_account(&rent::ID)?;
//! let data: Rent = wincode::deserialize(&rent.data)?;
//!
//! Ok(())
//! }
//! #
//! # let client = RpcClient::new(String::new());
//! # print_sysvar_rent(&client)?;
//! #
//! # Ok::<(), anyhow::Error>(())
//! ```
pub use ;