ISablierV2Lockup

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Inherits: IAdminable, IERC4906, IERC721Metadata

Common logic between all Sablier V2 Lockup contracts.

Functions

getAsset

Retrieves the address of the ERC-20 asset to be distributed.

Reverts if streamId references a null stream.

function getAsset(uint256 streamId) external view returns (IERC20 asset);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getDepositedAmount

Retrieves the amount deposited in the stream, denoted in units of the asset's decimals.

Reverts if streamId references a null stream.

function getDepositedAmount(uint256 streamId) external view returns (uint128 depositedAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getEndTime

Retrieves the stream's end time, which is a Unix timestamp.

Reverts if streamId references a null stream.

function getEndTime(uint256 streamId) external view returns (uint40 endTime);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getRecipient

Retrieves the stream's recipient.

Reverts if the NFT has been burned.

function getRecipient(uint256 streamId) external view returns (address recipient);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getRefundedAmount

Retrieves the amount refunded to the sender after a cancellation, denoted in units of the asset's decimals. This amount is always zero unless the stream was canceled.

Reverts if streamId references a null stream.

function getRefundedAmount(uint256 streamId) external view returns (uint128 refundedAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getSender

Retrieves the stream's sender.

Reverts if streamId references a null stream.

function getSender(uint256 streamId) external view returns (address sender);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getStartTime

Retrieves the stream's start time, which is a Unix timestamp.

Reverts if streamId references a null stream.

function getStartTime(uint256 streamId) external view returns (uint40 startTime);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

getWithdrawnAmount

Retrieves the amount withdrawn from the stream, denoted in units of the asset's decimals.

Reverts if streamId references a null stream.

function getWithdrawnAmount(uint256 streamId) external view returns (uint128 withdrawnAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isAllowedToHook

Retrieves a flag indicating whether the provided address is a contract allowed to hook to Sablier when a stream is canceled or when assets are withdrawn.

See ISablierLockupRecipient for more information.

function isAllowedToHook(address recipient) external view returns (bool result);

isCancelable

Retrieves a flag indicating whether the stream can be canceled. When the stream is cold, this flag is always false.

Reverts if streamId references a null stream.

function isCancelable(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isCold

Retrieves a flag indicating whether the stream is cold, i.e. settled, canceled, or depleted.

Reverts if streamId references a null stream.

function isCold(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isDepleted

Retrieves a flag indicating whether the stream is depleted.

Reverts if streamId references a null stream.

function isDepleted(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isStream

Retrieves a flag indicating whether the stream exists.

Does not revert if streamId references a null stream.

function isStream(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isTransferable

Retrieves a flag indicating whether the stream NFT can be transferred.

Reverts if streamId references a null stream.

function isTransferable(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

isWarm

Retrieves a flag indicating whether the stream is warm, i.e. either pending or streaming.

Reverts if streamId references a null stream.

function isWarm(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

MAX_BROKER_FEE

Retrieves the maximum broker fee that can be charged by the broker, denoted as a fixed-point number where 1e18 is 100%.

This value is hard coded as a constant.

function MAX_BROKER_FEE() external view returns (UD60x18);

nextStreamId

Counter for stream IDs, used in the create functions.

function nextStreamId() external view returns (uint256);

nftDescriptor

Contract that generates the non-fungible token URI.

function nftDescriptor() external view returns (ISablierV2NFTDescriptor);

refundableAmountOf

Calculates the amount that the sender would be refunded if the stream were canceled, denoted in units of the asset's decimals.

Reverts if streamId references a null stream.

function refundableAmountOf(uint256 streamId) external view returns (uint128 refundableAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

statusOf

Retrieves the stream's status.

Reverts if streamId references a null stream.

function statusOf(uint256 streamId) external view returns (Lockup.Status status);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

streamedAmountOf

Calculates the amount streamed to the recipient, denoted in units of the asset's decimals.

Reverts if streamId references a null stream. Notes:

• Upon cancellation of the stream, the amount streamed is calculated as the difference between the deposited amount and the refunded amount. Ultimately, when the stream becomes depleted, the streamed amount is equivalent to the total amount withdrawn.

function streamedAmountOf(uint256 streamId) external view returns (uint128 streamedAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

wasCanceled

Retrieves a flag indicating whether the stream was canceled.

Reverts if streamId references a null stream.

function wasCanceled(uint256 streamId) external view returns (bool result);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

withdrawableAmountOf

Calculates the amount that the recipient can withdraw from the stream, denoted in units of the asset's decimals.

Reverts if streamId references a null stream.

function withdrawableAmountOf(uint256 streamId) external view returns (uint128 withdrawableAmount);

Parameters

Name	Type	Description
streamId	uint256	The stream ID for the query.

allowToHook

Allows a recipient contract to hook to Sablier when a stream is canceled or when assets are withdrawn. Useful for implementing contracts that hold streams on behalf of users, such as vaults or staking contracts.

Emits an AllowToHook event. Notes:

• Does not revert if the contract is already on the allowlist.
• This is an irreversible operation. The contract cannot be removed from the allowlist. Requirements:
• msg.sender must be the contract admin.
• recipient must have a non-zero code size.
• recipient must implement ISablierLockupRecipient.

function allowToHook(address recipient) external;

Parameters

Name	Type	Description
recipient	address	The address of the contract to allow for hooks.

burn

Burns the NFT associated with the stream.

Emits a {Transfer} event. Requirements:

• Must not be delegate called.
• streamId must reference a depleted stream.
• The NFT must exist.
• msg.sender must be either the NFT owner or an approved third party.

function burn(uint256 streamId) external;

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream NFT to burn.

cancel

Cancels the stream and refunds any remaining assets to the sender.

Emits a {Transfer}, {CancelLockupStream}, and {MetadataUpdate} event. Notes:

• If there any assets left for the recipient to withdraw, the stream is marked as canceled. Otherwise, the stream is marked as depleted.
• This function attempts to invoke a hook on the recipient, if the resolved address is a contract. Requirements:
• Must not be delegate called.
• The stream must be warm and cancelable.
• msg.sender must be the stream's sender.

function cancel(uint256 streamId) external;

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream to cancel.

cancelMultiple

Cancels multiple streams and refunds any remaining assets to the sender.

Emits multiple {Transfer}, {CancelLockupStream}, and {MetadataUpdate} events. Notes:

• Refer to the notes in {cancel}. Requirements:
• All requirements from {cancel} must be met for each stream.

function cancelMultiple(uint256[] calldata streamIds) external;

Parameters

Name	Type	Description
streamIds	uint256[]	The IDs of the streams to cancel.

renounce

Removes the right of the stream's sender to cancel the stream.

Emits a RenounceLockupStream and {MetadataUpdate} event. Notes:

• This is an irreversible operation. Requirements:
• Must not be delegate called.
• streamId must reference a warm stream.
• msg.sender must be the stream's sender.
• The stream must be cancelable.

function renounce(uint256 streamId) external;

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream to renounce.

setNFTDescriptor

Sets a new NFT descriptor contract, which produces the URI describing the Sablier stream NFTs.

Emits a SetNFTDescriptor and {BatchMetadataUpdate} event. Notes:

• Does not revert if the NFT descriptor is the same. Requirements:
• msg.sender must be the contract admin.

function setNFTDescriptor(ISablierV2NFTDescriptor newNFTDescriptor) external;

Parameters

Name	Type	Description
newNFTDescriptor	ISablierV2NFTDescriptor	The address of the new NFT descriptor contract.

withdraw

Withdraws the provided amount of assets from the stream to the to address.

Emits a {Transfer}, {WithdrawFromLockupStream}, and {MetadataUpdate} event. Notes:

• This function attempts to call a hook on the recipient of the stream, unless msg.sender is the recipient. Requirements:
• Must not be delegate called.
• streamId must not reference a null or depleted stream.
• to must not be the zero address.
• amount must be greater than zero and must not exceed the withdrawable amount.
• to must be the recipient if msg.sender is not the stream's recipient or an approved third party.

function withdraw(uint256 streamId, address to, uint128 amount) external;

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream to withdraw from.
to	address	The address receiving the withdrawn assets.
amount	uint128	The amount to withdraw, denoted in units of the asset's decimals.

withdrawMax

Withdraws the maximum withdrawable amount from the stream to the provided address to.

Emits a {Transfer}, {WithdrawFromLockupStream}, and {MetadataUpdate} event. Notes:

• Refer to the notes in {withdraw}. Requirements:
• Refer to the requirements in {withdraw}.

function withdrawMax(uint256 streamId, address to) external returns (uint128 withdrawnAmount);

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream to withdraw from.
to	address	The address receiving the withdrawn assets.

Returns

Name	Type	Description
withdrawnAmount	uint128	The amount withdrawn, denoted in units of the asset's decimals.

withdrawMaxAndTransfer

Withdraws the maximum withdrawable amount from the stream to the current recipient, and transfers the NFT to newRecipient.

Emits a WithdrawFromLockupStream and a {Transfer} event. Notes:

• If the withdrawable amount is zero, the withdrawal is skipped.
• Refer to the notes in {withdraw}. Requirements:
• msg.sender must be the stream's recipient.
• Refer to the requirements in {withdraw}.
• Refer to the requirements in {IERC721.transferFrom}.

function withdrawMaxAndTransfer(uint256 streamId, address newRecipient) external returns (uint128 withdrawnAmount);

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream NFT to transfer.
newRecipient	address	The address of the new owner of the stream NFT.

Returns

Name	Type	Description
withdrawnAmount	uint128	The amount withdrawn, denoted in units of the asset's decimals.

withdrawMultiple

Withdraws assets from streams to the recipient of each stream.

Emits multiple {Transfer}, {WithdrawFromLockupStream}, and {MetadataUpdate} events. Notes:

• This function attempts to call a hook on the recipient of each stream, unless msg.sender is the recipient. Requirements:
• Must not be delegate called.
• There must be an equal number of streamIds and amounts.
• Each stream ID in the array must not reference a null or depleted stream.
• Each amount in the array must be greater than zero and must not exceed the withdrawable amount.

function withdrawMultiple(uint256[] calldata streamIds, uint128[] calldata amounts) external;

Parameters

Name	Type	Description
streamIds	uint256[]	The IDs of the streams to withdraw from.
amounts	uint128[]	The amounts to withdraw, denoted in units of the asset's decimals.

Events

AllowToHook

Emitted when the admin allows a new recipient contract to hook to Sablier.

event AllowToHook(address indexed admin, address recipient);

Parameters

Name	Type	Description
admin	address	The address of the current contract admin.
recipient	address	The address of the recipient contract put on the allowlist.

CancelLockupStream

Emitted when a stream is canceled.

event CancelLockupStream(
    uint256 streamId,
    address indexed sender,
    address indexed recipient,
    IERC20 indexed asset,
    uint128 senderAmount,
    uint128 recipientAmount
);

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream.
sender	address	The address of the stream's sender.
recipient	address	The address of the stream's recipient.
asset	IERC20	The contract address of the ERC-20 asset to be distributed.
senderAmount	uint128	The amount of assets refunded to the stream's sender, denoted in units of the asset's decimals.
recipientAmount	uint128	The amount of assets left for the stream's recipient to withdraw, denoted in units of the asset's decimals.

RenounceLockupStream

Emitted when a sender gives up the right to cancel a stream.

event RenounceLockupStream(uint256 indexed streamId);

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream.

SetNFTDescriptor

Emitted when the admin sets a new NFT descriptor contract.

event SetNFTDescriptor(
    address indexed admin, ISablierV2NFTDescriptor oldNFTDescriptor, ISablierV2NFTDescriptor newNFTDescriptor
);

Parameters

Name	Type	Description
admin	address	The address of the current contract admin.
oldNFTDescriptor	ISablierV2NFTDescriptor	The address of the old NFT descriptor contract.
newNFTDescriptor	ISablierV2NFTDescriptor	The address of the new NFT descriptor contract.

WithdrawFromLockupStream

Emitted when assets are withdrawn from a stream.

event WithdrawFromLockupStream(uint256 indexed streamId, address indexed to, IERC20 indexed asset, uint128 amount);

Parameters

Name	Type	Description
streamId	uint256	The ID of the stream.
to	address	The address that has received the withdrawn assets.
asset	IERC20	The contract address of the ERC-20 asset to be distributed.
amount	uint128	The amount of assets withdrawn, denoted in units of the asset's decimals.