IERC721Errors

error ERC721InvalidOwner(address owner)

Indicates that an address can't be an owner. For example, address(0) is a forbidden owner in ERC-20. Used in balance queries.

Name	Type	Description
owner	address	Address of the current owner of a token.

error ERC721NonexistentToken(uint256 tokenId)

Indicates a tokenId whose owner is the zero address.

Name	Type	Description
tokenId	uint256	Identifier number of a token.

error ERC721IncorrectOwner(address sender, uint256 tokenId, address owner)

Indicates an error related to the ownership over a particular token. Used in transfers.

Name	Type	Description
sender	address	Address whose tokens are being transferred.
tokenId	uint256	Identifier number of a token.
owner	address	Address of the current owner of a token.

error ERC721InvalidSender(address sender)

Indicates a failure with the token sender. Used in transfers.

Name	Type	Description
sender	address	Address whose tokens are being transferred.

error ERC721InvalidReceiver(address receiver)

Indicates a failure with the token receiver. Used in transfers.

Name	Type	Description
receiver	address	Address to which tokens are being transferred.

error ERC721InsufficientApproval(address operator, uint256 tokenId)

Indicates a failure with the operator’s approval. Used in transfers.

Name	Type	Description
operator	address	Address that may be allowed to operate on tokens without being their owner.
tokenId	uint256	Identifier number of a token.

error ERC721InvalidApprover(address approver)

Indicates a failure with the approver of a token to be approved. Used in approvals.

Name	Type	Description
approver	address	Address initiating an approval operation.

error ERC721InvalidOperator(address operator)

Indicates a failure with the operator to be approved. Used in approvals.

Name	Type	Description
operator	address	Address that may be allowed to operate on tokens without being their owner.