Module batch 

Batch account operations.

Common multi-account patterns as single methods with clearer intent and fewer repeated unsafe blocks.

Functions

close_and_transfer

Transfer all lamports from source to destination and zero the source.

realloc_checked

Checked realloc that also ensures the account remains rent-exempt after resizing.

realloc_checked_with

Reaping-safe realloc_checked: tops the account up to rent-exemption using the live Rent sysvar, so it stays correct after a rent reprice.

require_account_type

Assert that an account has the expected discriminator AND is owned by the given program. This two-check combo is the most common “is this the right account type?” pattern in Solana programs.

require_address

Assert that an account’s address matches an expected address.

require_rent_exempt

Verify that an account is rent-exempt using the hardcoded current rent constants (the fast, syscall-free path).

require_rent_exempt_with

Verify that an account is rent-exempt against a live crate::sysvar::Rent sysvar (RECOMMENDED for reaping-relevant checks).

require_same_address

Assert that two accounts have the same address.

transfer_lamports

Transfer amount lamports between two accounts without CPI.

zero_data

Zero the data bytes of an account without changing lamports or owner.