IERC1155

Inherits: IERC165

Required interface of an ERC-1155 compliant contract, as defined in the https://eips.ethereum.org/EIPS/eip-1155[ERC].

Functions

balanceOf

Returns the value of tokens of token type id owned by account.

function balanceOf(address account, uint256 id) external view returns (uint256);

balanceOfBatch

*xref:ROOT:erc1155.adoc#batch-operations[Batched] version of balanceOf. Requirements:

accounts and ids must have the same length.*

function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory);

setApprovalForAll

*Grants or revokes permission to operator to transfer the caller's tokens, according to approved, Emits an ApprovalForAll event. Requirements:

operator cannot be the zero address.*

function setApprovalForAll(address operator, bool approved) external;

isApprovedForAll

Returns true if operator is approved to transfer account's tokens. See setApprovalForAll.

function isApprovedForAll(address account, address operator) external view returns (bool);

*Transfers a value amount of tokens of type id from from to to. WARNING: This function can potentially allow a reentrancy attack when transferring tokens to an untrusted contract, when invoking IERC1155Receiver-onERC1155Received on the receiver. Ensure to follow the checks-effects-interactions pattern and consider employing reentrancy guards when interacting with untrusted contracts. Emits a {TransferSingle} event. Requirements:

to cannot be the zero address.
If the caller is not from, it must have been approved to spend from's tokens via {setApprovalForAll}.
from must have a balance of tokens of type id of at least value amount.
If to refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the acceptance magic value.*

function safeTransferFrom(address from, address to, uint256 id, uint256 value, bytes calldata data) external;

safeBatchTransferFrom

*xref:ROOT:erc1155.adoc#batch-operations[Batched] version of safeTransferFrom. WARNING: This function can potentially allow a reentrancy attack when transferring tokens to an untrusted contract, when invoking {IERC1155Receiver-onERC1155BatchReceived} on the receiver. Ensure to follow the checks-effects-interactions pattern and consider employing reentrancy guards when interacting with untrusted contracts. Emits either a {TransferSingle} or a {TransferBatch} event, depending on the length of the array arguments. Requirements:

ids and values must have the same length.
If to refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the acceptance magic value.*

function safeBatchTransferFrom(
    address from,
    address to,
    uint256[] calldata ids,
    uint256[] calldata values,
    bytes calldata data
) external;

Events

TransferSingle

Emitted when value amount of tokens of type id are transferred from from to to by operator.

event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

TransferBatch

Equivalent to multiple TransferSingle events, where operator, from and to are the same for all transfers.

event TransferBatch(
    address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values
);

ApprovalForAll

Emitted when account grants or revokes permission to operator to transfer their tokens, according to approved.

event ApprovalForAll(address indexed account, address indexed operator, bool approved);

URI

Emitted when the URI for token type id changes to value, if it is a non-programmatic URI. If an URI event was emitted for id, the standard https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that value will equal the value returned by {IERC1155MetadataURI-uri}.

event URI(string value, uint256 indexed id);

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