Extensions Functions

These functions are common for any extensions build for ERC721 and ERC1155

General Functions

tokenExtension

Get the extension that minted the specified token. If not minted by a token, will return the 0x0 address

Permissions: Public function callable by anyone.

function tokenExtension(uint256 tokenId) external view returns (address)

Extension Mangement

Functions used to manage installed extensions

getExtensions

Gets a list of all registered extensions.

Permissions: Public function callable by anyone.

function getExtensions() view returns (address[] memory extensions)

registerExtension

Registers an extension, allowing it to access the mint function, and ability to set a token’s metadata URI or a base URI for that extension. The token URI for tokens minted by this extension will be baseURI<tokenID>. When registering an extension you can specify a third boolean parameter of "true" for baseURIIdentical to specify the token URI for all tokens to be identical (will not increment with appended tokenId).

Permissions: Owner/Admin function callable by contract owner only.

function registerExtension(address extension, string calldata baseURI, bool baseURIIdentical)s, baseURI (string), baseURI (string)

function registerExtension(address extension, string calldata baseURI)

unregisterExtension

Unregisters an extension and removes access to the mint function and all other extension capabilities.

Permissions: Owner/Admin function callable by contract owner only.

function unregisterExtension(address extension)

blacklistExtension

Blacklists an extension, preventing future registrations of the address. This function also destroys all references to metadata associated with tokens created by this extension, making them effectively useless.

Permissions: Owner/Admin function callable by contract owner only.

function blacklistExtension(address extension)

setApproveTransferExtension

If set as true, indicates that the creator should check with the extension for transfer approval prior to each transfer.

Permissions: Owner/Admin function callable by contract owner only.

function setApproveTransferExtension(bool enabled)

setRoyaltiesExtension

Override the royalties for all tokens minted by the specified extension

Permissions: Owner/Admin function callable by contract owner only.

function setRoyaltiesExtension(address extension, address payable[] calldata receivers, uint256[] calldata basisPoints)

Extension Metadata Functions

Functions used by extensions to set the metadata of tokens minted by the extension

setBaseTokenURIExtension

Sets the base URI for any tokens minted from this extension. Once set, the metadata URI will be base_uri/<tokenId> by default.

Permissions: Only callable by an extension

function setBaseTokenURIExtension(string calldata uri)

setTokenURIPrefixExtension

Sets a prefix for all tokens minted from this extension. If configured, and a token has a URI set, tokenURI will return <prefixURI><tokenURI>.

Permissions: Only callable by an extension

function setTokenURIPrefixExtension(string calldata prefix)

setTokenURIExtension

Set the tokenURI for a specific token minted from this extension. Useful if you want to do something with a dynamic metadata server and need sequential numbering of tokens. Various methods defined below.

Permissions: Only callable by an extension and only on token minted by the extension

function setTokenURIExtension(uint256 tokenId, string calldata uri) external

function setTokenURIExtension(uint256[] memory tokenId, string[] calldata uri)

Extension Logic Overriding

The powerful thing about Manifold Creator is the ability for extensions to fully override core functionality of NFT smart contracts. The following is a list of functionality extensions can override.

Metadata Handling

An extension can fully manage the token metadata logic by implementing the ICreatorExtensionTokenURI interface.

If an extension implements this interface then all metadata logic will be deferred to the extension's tokenURI function.

Token Transfer Approval

An extension can control whether or not a token can be transferred. To do this, the extension must implement the IERC721CreatorExtensionApproveTransfer interface (for ERC721) or the IERC1155CreatorExtensionApproveTransfer interface (for ERC1155).

If an extension implements this interface, by default, all transfers will call the extension's approveTransfer function prior to every token transfer. An extension can enable/disable this by calling the setApproveTransferExtension function.

Token Burn Callback

An extension can receive a callback whenever a token is burned. To do this, the extension must implement the IERC721CreatorExtensionBurnable interface (for ERC721) or the IERC1155CreatorExtensionBurnable interface (for ERC1155).

If an extension implements this interface, every time a token is burned it will call the extension's onBurn function.

Minting

These are functions used by extensions to mint NFTs.

ERC721

mintExtension

Mints a token from the extension. Also can set token URI if desired by indicating token URI.

Permissions: Only callable by an installed extension

function mintExtension(address to) returns (uint256)

function mintExtension(address to, string calldata uri) returns (uint256)

mintExtensionBatch

Batch mints tokens from the extension. Also can set token URI if desired by indicating token URIs.

Permissions: Only callable by an installed extension

function mintExtensionBatch(address to, uint16 count) returns (uint256[] memory)

function mintExtensionBatch(address to, string[] calldata uris) returns (uint256[] memory)

ERC1155

mintExtensionNew

Mints a completely new token with the given amount from an extension. If URI is empty, URI will fall back to the default URI configured.

Permissions: Only callable by an installed extension

function mintExtensionNew(address[] calldata to, uint256[] calldata amounts, string[] calldata uris) returns (uint256[] memory)

mintExtensionExisting

Mints more of an existing token from the extension. Requires that the original token already exist and that it is not a token from an extension.

Permissions: Only callable by an installed extension

function mintExtensionExisting(address[] calldata to, uint256[] calldata tokenIds, uint256[] calldata amounts)