Module bpf_loader_upgradeable

An upgradeable BPF loader native program.

The upgradeable BPF loader is responsible for deploying, upgrading, and executing BPF programs. The upgradeable loader allows a program’s authority to update the program at any time. This ability breaks the “code is law” contract that once a program is on-chain it is immutable. Because of this, care should be taken before executing upgradeable programs which still have a functioning authority. For more information refer to the loader_upgradeable_instruction module.

The solana program deploy CLI command uses the upgradeable BPF loader. Calling solana program deploy --final deploys a program that cannot be upgraded, but it does so by revoking the authority to upgrade, not by using the non-upgradeable loader.

Enums

UpgradeableLoaderState

Upgradeable loader account states

Constants

ID

The const program ID.

Functions

check_id

Returns true if given pubkey is the program ID.

close

Returns the instructions required to close a buffer account

close_any

Returns the instructions required to close program, buffer, or uninitialized account

create_buffer

Returns the instructions required to initialize a Buffer account.

deploy_with_max_program_len

Returns the instructions required to deploy a program with a specified maximum program length. The maximum length must be large enough to accommodate any future upgrades.

extend_program

Returns the instruction required to extend the size of a program’s executable data account

get_program_data_address

Returns the program data address for a program ID

id

Returns the program ID.

is_close_instruction

is_set_authority_checked_instruction

is_set_authority_instruction

is_upgrade_instruction

set_buffer_authority

Returns the instructions required to set a buffers’s authority.

set_buffer_authority_checked

Returns the instructions required to set a buffers’s authority. If using this instruction, the new authority must sign.

set_upgrade_authority

Returns the instructions required to set a program’s authority.

set_upgrade_authority_checked

Returns the instructions required to set a program’s authority. If using this instruction, the new authority must sign.

upgrade

Returns the instructions required to upgrade a program.

write

Returns the instructions required to write a chunk of program data to a buffer account.