Struct UpdateConfig 

pub struct UpdateConfig<'info> {
    pub config: Account<'info, Config>,
    pub authority: Signer<'info>,
}

Accounts for the update_config instruction.

has_one = authority is the authorization primitive — Anchor emits ConstraintHasOne (error code 2001) automatically if the signer does not match config.authority. NO custom Unauthorized variant exists (T1.06 consolidation; see program/spec.md §"Error Codes").

bump = config.bump uses the stored canonical bump instead of re-deriving (≈10K CU saving per ADR 0028).

Fields

config: Account<'info, Config>

authority: Signer<'info>

Trait Implementations

impl<'info> Accounts<'info, UpdateConfigBumps> for UpdateConfig<'info>

where 'info: 'info,

fn try_accounts( __program_id: &Pubkey, __accounts: &mut &'info [AccountInfo<'info>], __ix_data: &[u8], __bumps: &mut UpdateConfigBumps, __reallocs: &mut BTreeSet<Pubkey>, ) -> Result<Self>

Returns the validated accounts struct. What constitutes “valid” is program dependent. However, users of these types should never have to worry about account substitution attacks. For example, if a program expects a Mint account from the SPL token program in a particular field, then it should be impossible for this method to return Ok if any other account type is given–from the SPL token program or elsewhere.

impl<'info> AccountsExit<'info> for UpdateConfig<'info>

where 'info: 'info,

fn exit(&self, program_id: &Pubkey) -> Result<()>

program_id is the currently executing program.

impl<'info> Bumps for UpdateConfig<'info>

where 'info: 'info,

type Bumps = UpdateConfigBumps

Struct to hold account bump seeds.

impl<'info> ToAccountInfos<'info> for UpdateConfig<'info>

where 'info: 'info,

fn to_account_infos(&self) -> Vec<AccountInfo<'info>>

impl<'info> ToAccountMetas for UpdateConfig<'info>

fn to_account_metas(&self, is_signer: Option<bool>) -> Vec<AccountMeta>

is_signer is given as an optional override for the signer meta field. This covers the edge case when a program-derived-address needs to relay a transaction from a client to another program but sign the transaction before the relay. The client cannot mark the field as a signer, and so we have to override the is_signer meta field given by the client.