HoldAtSnapshotFacet
Asset Tokenization Studio Team
HoldAtSnapshotFacet
Diamond facet that exposes the held-balance-at-snapshot query via IHoldAtSnapshot, registered under RESOLVER_KEY_HOLD_AT_SNAPSHOT.
Exposes one selector: heldBalanceOfAtSnapshot. Inherits read logic from HoldAtSnapshot and satisfies IStaticFunctionSelectors for Diamond proxy selector registration.
Methods
getStaticFunctionSelectors
function getStaticFunctionSelectors() external pure returns (bytes4[])
Gets all function selectors of a facet
Returns
| Name | Type | Description |
|---|---|---|
| _0 | bytes4[] | Face functions selectors |
getStaticInterfaceIds
function getStaticInterfaceIds() external pure returns (bytes4[])
Gets all interfaces ids of a facet.
Returns
| Name | Type | Description |
|---|---|---|
| _0 | bytes4[] | Face interface ids |
getStaticResolverKey
function getStaticResolverKey() external pure returns (bytes32 staticResolverKey_)
Gets the static resolver key
Returns
| Name | Type | Description |
|---|---|---|
| staticResolverKey_ | bytes32 | Static resolver key |
heldBalanceOfAtSnapshot
function heldBalanceOfAtSnapshot(uint256 _snapshotID, address _tokenHolder) external view returns (uint256 balance_)
Returns the held balance of a token holder at the time of a given snapshot.
Sums all hold escrow amounts active at _snapshotID, adjusted for any balance-adjustment factor recorded at that snapshot timestamp.
Parameters
| Name | Type | Description |
|---|---|---|
| _snapshotID | uint256 | The snapshot identifier returned by a prior takeSnapshot call. |
| _tokenHolder | address | The address of the token holder. |
Returns
| Name | Type | Description |
|---|---|---|
| balance_ | uint256 | The held balance of _tokenHolder recorded at _snapshotID. |
initializeHoldAtSnapshot
function initializeHoldAtSnapshot() external nonpayable
Initialises the hold-at-snapshot capability on the token.
Callable once; subsequent calls revert with FacetAlreadyRegistered. Requires DEFAULT_ADMIN_ROLE. Called by the factory during deployment.
Events
HoldAtSnapshotInitialized
event HoldAtSnapshotInitialized()
Emitted once when the hold-at-snapshot capability is initialised on a token.
Fires exclusively from initializeHoldAtSnapshot.
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.