IERC721Upgradeable
Required interface of an ERC721 compliant contract.
Methods
approve
function approve(address to, uint256 tokenId) external nonpayable
Gives permission to to to transfer tokenId token to another account. The approval is cleared when the token is transferred. Only a single account can be approved at a time, so approving the zero address clears previous approvals. Requirements: - The caller must own the token or be an approved operator. - tokenId must exist. Emits an {Approval} event.
Parameters
| Name | Type | Description |
|---|
| to | address | undefined |
| tokenId | uint256 | undefined |
balanceOf
function balanceOf(address owner) external view returns (uint256 balance)
Returns the number of tokens in owner's account.
Parameters
| Name | Type | Description |
|---|
| owner | address | undefined |
Returns
| Name | Type | Description |
|---|
| balance | uint256 | undefined |
getApproved
function getApproved(uint256 tokenId) external view returns (address operator)
Returns the account approved for tokenId token. Requirements: - tokenId must exist.
Parameters
| Name | Type | Description |
|---|
| tokenId | uint256 | undefined |
Returns
| Name | Type | Description |
|---|
| operator | address | undefined |
isApprovedForAll
function isApprovedForAll(address owner, address operator) external view returns (bool)
Returns if the operator is allowed to manage all of the assets of owner. See {setApprovalForAll}
Parameters
| Name | Type | Description |
|---|
| owner | address | undefined |
| operator | address | undefined |
Returns
| Name | Type | Description |
|---|
| _0 | bool | undefined |
ownerOf
function ownerOf(uint256 tokenId) external view returns (address owner)
Returns the owner of the tokenId token. Requirements: - tokenId must exist.
Parameters
| Name | Type | Description |
|---|
| tokenId | uint256 | undefined |
Returns
| Name | Type | Description |
|---|
| owner | address | undefined |
safeTransferFrom
function safeTransferFrom(address from, address to, uint256 tokenId) external nonpayable
Safely transfers tokenId token from from to to, checking first that contract recipients are aware of the ERC721 protocol to prevent tokens from being forever locked. Requirements: - from cannot be the zero address. - to cannot be the zero address. - tokenId token must exist and be owned by from. - If the caller is not from, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. - If to refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. Emits a {Transfer} event.
Parameters
| Name | Type | Description |
|---|
| from | address | undefined |
| to | address | undefined |
| tokenId | uint256 | undefined |
safeTransferFrom
function safeTransferFrom(address from, address to, uint256 tokenId, bytes data) external nonpayable
Safely transfers tokenId token from from to to. Requirements: - from cannot be the zero address. - to cannot be the zero address. - tokenId token must exist and be owned by from. - If the caller is not from, it must be approved to move this token by either {approve} or {setApprovalForAll}. - If to refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. Emits a {Transfer} event.
Parameters
| Name | Type | Description |
|---|
| from | address | undefined |
| to | address | undefined |
| tokenId | uint256 | undefined |
| data | bytes | undefined |
setApprovalForAll
function setApprovalForAll(address operator, bool _approved) external nonpayable
Approve or remove operator as an operator for the caller. Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. Requirements: - The operator cannot be the caller. Emits an {ApprovalForAll} event.
Parameters
| Name | Type | Description |
|---|
| operator | address | undefined |
| _approved | bool | undefined |
supportsInterface
function supportsInterface(bytes4 interfaceId) external view returns (bool)
Returns true if this contract implements the interface defined by interfaceId. See the corresponding https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] to learn more about how these ids are created. This function call must use less than 30 000 gas.
Parameters
| Name | Type | Description |
|---|
| interfaceId | bytes4 | undefined |
Returns
| Name | Type | Description |
|---|
| _0 | bool | undefined |
transferFrom
function transferFrom(address from, address to, uint256 tokenId) external nonpayable
Transfers tokenId token from from to to. WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. Requirements: - from cannot be the zero address. - to cannot be the zero address. - tokenId token must be owned by from. - If the caller is not from, it must be approved to move this token by either {approve} or {setApprovalForAll}. Emits a {Transfer} event.
Parameters
| Name | Type | Description |
|---|
| from | address | undefined |
| to | address | undefined |
| tokenId | uint256 | undefined |
Events
Approval
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId)
Emitted when owner enables approved to manage the tokenId token.
Parameters
| Name | Type | Description |
|---|
owner indexed | address | undefined |
approved indexed | address | undefined |
tokenId indexed | uint256 | undefined |
ApprovalForAll
event ApprovalForAll(address indexed owner, address indexed operator, bool approved)
Emitted when owner enables or disables (approved) operator to manage all of its assets.
Parameters
| Name | Type | Description |
|---|
owner indexed | address | undefined |
operator indexed | address | undefined |
| approved | bool | undefined |
Transfer
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId)
Emitted when tokenId token is transferred from from to to.
Parameters
| Name | Type | Description |
|---|
from indexed | address | undefined |
to indexed | address | undefined |
tokenId indexed | uint256 | undefined |