Module batch 

Batch account operations.

Common multi-account patterns as single methods with clearer intent and fewer repeated unsafe blocks. These are operations that every serious Solana program needs but nobody bundles at the substrate level.

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.

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 given the current rent parameters.

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.