pub struct AuthMultisig { /* private fields */ }Expand description
An AccountComponent implementing a multisig authentication.
It enforces a threshold of approver signatures for every transaction, with optional per-procedure threshold overrides.
§Privacy
Approvers using AuthScheme::EcdsaK256Keccak disclose their public key and signature
at proving time and therefore do not get public-key privacy; approvers using
Falcon512Poseidon2 do. See Approver for details.
§Security: private accounts and state withholding
A private account’s state lives off-chain; the chain only holds a commitment to it. Whoever advances the account must share the new state with the other approvers, otherwise those approvers can no longer reconstruct the state behind the on-chain commitment and are permanently locked out (and the signers retaining the state can drain its assets). This is a data-availability problem inherent to private state, not an authorization one: the threshold controls who can advance the state, not whether the resulting state is shared. A per-procedure threshold of one lets a single approver do this; more generally, any quorum smaller than the full approver set can advance the state and withhold it from the excluded approvers.
The only configurations that fully prevent withholding are a public account (state is on-chain,
so nothing can be withheld), unanimity (threshold == number of approvers, so every approver
signs and therefore sees every state transition), or pairing the multisig with a guardian via
AuthGuardedMultisig, whose guardian co-signs every transaction
and forwards the new state. For a private m-of-n wallet among mutually distrusting
approvers, prefer the guarded variant. The create_multisig_wallet helper enforces a related
bound: on private accounts it rejects per-procedure thresholds below the default.
§Security: growing the signer set does not re-scale overrides
Per-procedure threshold overrides are absolute signature counts, not ratios. Updating the signer
set (via the update_signers_and_threshold account procedure) does not re-scale existing
overrides: the only cross-check is that each override stays <= num_approvers, which keeps it
reachable but never raises it. Growing the approver set therefore silently lowers the effective
signing ratio of every override (e.g. a 2-of-2 override becomes 2-of-n). To preserve the
intended security level, re-evaluate the affected overrides and, where appropriate, raise them
via set_procedure_threshold in the same transaction that grows the signer set.
Implementations§
Source§impl AuthMultisig
impl AuthMultisig
Sourcepub const NAME: &'static str = "miden::standards::components::auth::multisig"
pub const NAME: &'static str = "miden::standards::components::auth::multisig"
The name of the component.
Sourcepub const fn name() -> AccountComponentName
pub const fn name() -> AccountComponentName
Returns the canonical AccountComponentName of this component.
Sourcepub fn code() -> &'static AccountComponentCode
pub fn code() -> &'static AccountComponentCode
Returns the AccountComponentCode of this component.
Sourcepub fn new(config: AuthMultisigConfig) -> Result<AuthMultisig, AccountError>
pub fn new(config: AuthMultisigConfig) -> Result<AuthMultisig, AccountError>
Creates a new AuthMultisig component from the provided configuration.
Sourcepub fn threshold_config_slot() -> &'static StorageSlotName
pub fn threshold_config_slot() -> &'static StorageSlotName
Returns the StorageSlotName where the threshold configuration is stored.
Sourcepub fn approver_public_keys_slot() -> &'static StorageSlotName
pub fn approver_public_keys_slot() -> &'static StorageSlotName
Returns the StorageSlotName where the approver public keys are stored.
pub fn approver_scheme_ids_slot() -> &'static StorageSlotName
Sourcepub fn executed_transactions_slot() -> &'static StorageSlotName
pub fn executed_transactions_slot() -> &'static StorageSlotName
Returns the StorageSlotName where the executed transactions are stored.
Sourcepub fn procedure_thresholds_slot() -> &'static StorageSlotName
pub fn procedure_thresholds_slot() -> &'static StorageSlotName
Returns the StorageSlotName where the procedure thresholds are stored.
Sourcepub fn threshold_config_slot_schema() -> (StorageSlotName, StorageSlotSchema)
pub fn threshold_config_slot_schema() -> (StorageSlotName, StorageSlotSchema)
Returns the storage slot schema for the threshold configuration slot.
Sourcepub fn approver_public_keys_slot_schema() -> (StorageSlotName, StorageSlotSchema)
pub fn approver_public_keys_slot_schema() -> (StorageSlotName, StorageSlotSchema)
Returns the storage slot schema for the approver public keys slot.
pub fn approver_auth_scheme_slot_schema() -> (StorageSlotName, StorageSlotSchema)
Sourcepub fn executed_transactions_slot_schema() -> (StorageSlotName, StorageSlotSchema)
pub fn executed_transactions_slot_schema() -> (StorageSlotName, StorageSlotSchema)
Returns the storage slot schema for the executed transactions slot.
Sourcepub fn procedure_thresholds_slot_schema() -> (StorageSlotName, StorageSlotSchema)
pub fn procedure_thresholds_slot_schema() -> (StorageSlotName, StorageSlotSchema)
Returns the storage slot schema for the procedure thresholds slot.
Sourcepub fn component_metadata() -> AccountComponentMetadata
pub fn component_metadata() -> AccountComponentMetadata
Returns the AccountComponentMetadata for this component.
Trait Implementations§
Source§impl Debug for AuthMultisig
impl Debug for AuthMultisig
Source§impl From<AuthMultisig> for AccountComponent
impl From<AuthMultisig> for AccountComponent
Source§fn from(multisig: AuthMultisig) -> AccountComponent
fn from(multisig: AuthMultisig) -> AccountComponent
Auto Trait Implementations§
impl Freeze for AuthMultisig
impl RefUnwindSafe for AuthMultisig
impl Send for AuthMultisig
impl Sync for AuthMultisig
impl Unpin for AuthMultisig
impl UnsafeUnpin for AuthMultisig
impl UnwindSafe for AuthMultisig
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