FreezeAtSnapshot
Asset Tokenization Studio Team
FreezeAtSnapshot
Abstract implementation of IFreezeAtSnapshot, providing snapshot-aware frozen balance queries.
Stateless wrapper that delegates the actual lookup to {SnapshotsStorageWrapper}. Intended to be inherited by FreezeAtSnapshotFacet.
Methods
frozenBalanceOfAtSnapshot
function frozenBalanceOfAtSnapshot(uint256 _snapshotID, address _tokenHolder) external view returns (uint256 balance_)
Returns the frozen balance of an account at the time of a given snapshot.
Parameters
| Name | Type | Description |
|---|---|---|
| _snapshotID | uint256 | The identifier of the snapshot to query. |
| _tokenHolder | address | The address whose frozen balance is being queried. |
Returns
| Name | Type | Description |
|---|---|---|
| balance_ | uint256 | The frozen balance of _tokenHolder at snapshot _snapshotID. |
initializeFreezeAtSnapshot
function initializeFreezeAtSnapshot() external nonpayable
Initialises the freeze-at-snapshot capability on the token.
Callable once; subsequent calls revert with FacetAlreadyRegistered. Requires DEFAULT_ADMIN_ROLE. Called by the factory during deployment.
Events
FreezeAtSnapshotInitialized
event FreezeAtSnapshotInitialized()
Emitted once when the freeze-at-snapshot capability is initialised on a token.
Fires exclusively from initializeFreezeAtSnapshot.
Errors
AccountHasNoRole
error AccountHasNoRole(address account, bytes32 role)
Thrown when an account does not hold a required role.
Parameters
| Name | Type | Description |
|---|---|---|
| account | address | The account that lacks the role. |
| role | bytes32 | The role that is not held. |
FacetAlreadyRegistered
error FacetAlreadyRegistered(bytes32 facetId, uint256 lastVersion)
Raised when an initialiser tries to register a facet that already has a non-zero last registered version (i.e. the facet is being re-initialised on a fresh install).
Parameters
| Name | Type | Description |
|---|---|---|
| facetId | bytes32 | Identifier of the offending facet. |
| lastVersion | uint256 | Last version recorded for that facet at the time of the check. |
SnapshotIdDoesNotExists
error SnapshotIdDoesNotExists(uint256 snapshotId)
Thrown when the requested snapshot identifier has never been taken on this token.
Parameters
| Name | Type | Description |
|---|---|---|
| snapshotId | uint256 | The unrecognised snapshot identifier that was supplied. |
SnapshotIdNull
error SnapshotIdNull()
Thrown when a snapshot identifier of zero is supplied; zero is reserved and never assigned to a valid snapshot.
UnrecognizedResolverProxyVersion
error UnrecognizedResolverProxyVersion(bytes8 _resolverProxyVersion)
Thrown when the provided proxy version does not match any BLR compatible standard.
Parameters
| Name | Type | Description |
|---|---|---|
| _resolverProxyVersion | bytes8 | proxy version that is not compatible with the BLR. |
WalletRecovered
error WalletRecovered()
Thrown when attempting to recover a wallet that has already been recovered.