ERC1155Base

The ERC1155Base smart contract implements the ERC1155 NFT standard. It includes the following additions to standard ERC1155 logic: - Ability to mint NFTs via the provided mintTo and batchMintTo functions. - Contract metadata for royalty support on platforms such as OpenSea that use off-chain information to distribute roaylties. - Ownership of the contract, with the ability to restrict certain functions to only be called by the contract's owner. - Multicall capability to perform multiple actions atomically - EIP 2981 compliance for royalty support on NFT marketplaces.

Methods

balanceOf

function balanceOf(address, uint256) external view returns (uint256)

Get the balance of an account's Tokens.

Parameters

Name	Type	Description
_0	address	undefined
_1	uint256	undefined

Returns

Name	Type	Description
_0	uint256	undefined

balanceOfBatch

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

Parameters

Name	Type	Description
accounts	address[]	undefined
ids	uint256[]	undefined

Returns

Name	Type	Description
_0	uint256[]	undefined

batchMintTo

function batchMintTo(address _to, uint256[] _tokenIds, uint256[] _amounts, string _baseURI) external nonpayable

Lets an authorized address mint multiple NEW NFTs at once to a recipient.

The logic in the _canMint function determines whether the caller is authorized to mint NFTs. If _tokenIds[i] == type(uint256).max a new NFT at tokenId nextTokenIdToMint is minted. If the given tokenIds[i] < nextTokenIdToMint, then additional supply of an existing NFT is minted. The metadata for each new NFT is stored at baseURI/{tokenID of NFT}

Parameters

Name	Type	Description
_to	address	The recipient of the NFT to mint.
_tokenIds	uint256[]	The tokenIds of the NFTs to mint.
_amounts	uint256[]	The amounts of each NFT to mint.
_baseURI	string	The baseURI for the n number of NFTs minted. The metadata for each NFT is baseURI/tokenId

burn

function burn(address _owner, uint256 _tokenId, uint256 _amount) external nonpayable

Lets an owner or approved operator burn NFTs of the given tokenId.

Parameters

Name	Type	Description
_owner	address	The owner of the NFT to burn.
_tokenId	uint256	The tokenId of the NFT to burn.
_amount	uint256	The amount of the NFT to burn.

burnBatch

function burnBatch(address _owner, uint256[] _tokenIds, uint256[] _amounts) external nonpayable

Lets an owner or approved operator burn NFTs of the given tokenIds.

Parameters

Name	Type	Description
_owner	address	The owner of the NFTs to burn.
_tokenIds	uint256[]	The tokenIds of the NFTs to burn.
_amounts	uint256[]	The amounts of the NFTs to burn.

contractURI

function contractURI() external view returns (string)

Returns the contract metadata URI.

Returns

Name	Type	Description
_0	string	undefined

getBaseURICount

function getBaseURICount() external view returns (uint256)

Returns the count of batches of NFTs.

Each batch of tokens has an in ID and an associated baseURI. See {batchIds}.

Returns

Name	Type	Description
_0	uint256	undefined

getBatchIdAtIndex

function getBatchIdAtIndex(uint256 _index) external view returns (uint256)

Returns the ID for the batch of tokens the given tokenId belongs to.

See {getBaseURICount}.

Parameters

Name	Type	Description
_index	uint256	ID of a token.

Returns

Name	Type	Description
_0	uint256	undefined

getDefaultRoyaltyInfo

function getDefaultRoyaltyInfo() external view returns (address, uint16)

Returns the defualt royalty recipient and BPS for this contract's NFTs.

Returns

Name	Type	Description
_0	address	undefined
_1	uint16	undefined

getRoyaltyInfoForToken

function getRoyaltyInfoForToken(uint256 _tokenId) external view returns (address, uint16)

View royalty info for a given token.

Returns royalty recipient and bps for _tokenId.

Parameters

Name	Type	Description
_tokenId	uint256	The tokenID of the NFT for which to query royalty info.

Returns

Name	Type	Description
_0	address	undefined
_1	uint16	undefined

isApprovedForAll

function isApprovedForAll(address, address) external view returns (bool)

Queries the approval status of an operator for a given owner.

Parameters

Name	Type	Description
_0	address	undefined
_1	address	undefined

Returns

Name	Type	Description
_0	bool	undefined

mintTo

function mintTo(address _to, uint256 _tokenId, string _tokenURI, uint256 _amount) external nonpayable

Lets an authorized address mint NFTs to a recipient.

- The logic in the _canMint function determines whether the caller is authorized to mint NFTs. - If _tokenId == type(uint256).max a new NFT at tokenId nextTokenIdToMint is minted. If the given tokenId < nextTokenIdToMint, then additional supply of an existing NFT is being minted.

Parameters

Name	Type	Description
_to	address	The recipient of the NFTs to mint.
_tokenId	uint256	The tokenId of the NFT to mint.
_tokenURI	string	The full metadata URI for the NFTs minted (if a new NFT is being minted).
_amount	uint256	The amount of the same NFT to mint.

multicall

function multicall(bytes[] data) external nonpayable returns (bytes[] results)

Receives and executes a batch of function calls on this contract.

Receives and executes a batch of function calls on this contract.

Parameters

Name	Type	Description
data	bytes[]	The bytes data that makes up the batch of function calls to execute.

Returns

Name	Type	Description
results	bytes[]	The bytes data that makes up the result of the batch of function calls executed.

name

function name() external view returns (string)

Returns

Name	Type	Description
_0	string	undefined

nextTokenIdToMint

function nextTokenIdToMint() external view returns (uint256)

The tokenId assigned to the next new NFT to be minted.

Returns

Name	Type	Description
_0	uint256	undefined

owner

function owner() external view returns (address)

Returns the owner of the contract.

Returns

Name	Type	Description
_0	address	undefined

royaltyInfo

function royaltyInfo(uint256 tokenId, uint256 salePrice) external view returns (address receiver, uint256 royaltyAmount)

View royalty info for a given token and sale price.

Returns royalty amount and recipient for tokenId and salePrice.

Parameters

Name	Type	Description
tokenId	uint256	The tokenID of the NFT for which to query royalty info.
salePrice	uint256	Sale price of the token.

Returns

Name	Type	Description
receiver	address	Address of royalty recipient account.
royaltyAmount	uint256	Royalty amount calculated at current royaltyBps value.

safeBatchTransferFrom

function safeBatchTransferFrom(address from, address to, uint256[] ids, uint256[] amounts, bytes data) external nonpayable

Parameters

Name	Type	Description
from	address	undefined
to	address	undefined
ids	uint256[]	undefined
amounts	uint256[]	undefined
data	bytes	undefined

safeTransferFrom

function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes data) external nonpayable

Parameters

Name	Type	Description
from	address	undefined
to	address	undefined
id	uint256	undefined
amount	uint256	undefined
data	bytes	undefined

setApprovalForAll

function setApprovalForAll(address operator, bool approved) external nonpayable

Parameters

Name	Type	Description
operator	address	undefined
approved	bool	undefined

setContractURI

function setContractURI(string _uri) external nonpayable

Lets a contract admin set the URI for contract-level metadata.

Caller should be authorized to setup contractURI, e.g. contract admin. See {_canSetContractURI}. Emits {ContractURIUpdated Event}.

Parameters

Name	Type	Description
_uri	string	keccak256 hash of the role. e.g. keccak256("TRANSFER_ROLE")

setDefaultRoyaltyInfo

function setDefaultRoyaltyInfo(address _royaltyRecipient, uint256 _royaltyBps) external nonpayable

Updates default royalty recipient and bps.

Caller should be authorized to set royalty info. See {_canSetRoyaltyInfo}. Emits {DefaultRoyalty Event}; See {_setupDefaultRoyaltyInfo}.

Parameters

Name	Type	Description
_royaltyRecipient	address	Address to be set as default royalty recipient.
_royaltyBps	uint256	Updated royalty bps.

setOwner

function setOwner(address _newOwner) external nonpayable

Lets an authorized wallet set a new owner for the contract.

Parameters

Name	Type	Description
_newOwner	address	The address to set as the new owner of the contract.

setRoyaltyInfoForToken

function setRoyaltyInfoForToken(uint256 _tokenId, address _recipient, uint256 _bps) external nonpayable

Updates default royalty recipient and bps for a particular token.

Sets royalty info for _tokenId. Caller should be authorized to set royalty info. See {_canSetRoyaltyInfo}. Emits {RoyaltyForToken Event}; See {_setupRoyaltyInfoForToken}.

Parameters

Name	Type	Description
_tokenId	uint256	undefined
_recipient	address	Address to be set as royalty recipient for given token Id.
_bps	uint256	Updated royalty bps for the token Id.

supportsInterface

function supportsInterface(bytes4 interfaceId) external view returns (bool)

Returns whether this contract supports the given interface.

Parameters

Name	Type	Description
interfaceId	bytes4	undefined

Returns

Name	Type	Description
_0	bool	undefined

symbol

function symbol() external view returns (string)

Returns

Name	Type	Description
_0	string	undefined

totalSupply

function totalSupply(uint256) external view returns (uint256)

Returns the total supply of NFTs of a given tokenId

Mapping from tokenId => total circulating supply of NFTs of that tokenId.

Parameters

Name	Type	Description
_0	uint256	undefined

Returns

Name	Type	Description
_0	uint256	undefined

uri

function uri(uint256 _tokenId) external view returns (string)

Returns the metadata URI for the given tokenId.

Parameters

Name	Type	Description
_tokenId	uint256	undefined

Returns

Name	Type	Description
_0	string	undefined

Events

ApprovalForAll

event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved)

Parameters

Name	Type	Description
_owner indexed	address	undefined
_operator indexed	address	undefined
_approved	bool	undefined

ContractURIUpdated

event ContractURIUpdated(string prevURI, string newURI)

Parameters

Name	Type	Description
prevURI	string	undefined
newURI	string	undefined

DefaultRoyalty

event DefaultRoyalty(address indexed newRoyaltyRecipient, uint256 newRoyaltyBps)

Parameters

Name	Type	Description
newRoyaltyRecipient indexed	address	undefined
newRoyaltyBps	uint256	undefined

OwnerUpdated

event OwnerUpdated(address indexed prevOwner, address indexed newOwner)

Parameters

Name	Type	Description
prevOwner indexed	address	undefined
newOwner indexed	address	undefined

RoyaltyForToken

event RoyaltyForToken(uint256 indexed tokenId, address indexed royaltyRecipient, uint256 royaltyBps)

Parameters

Name	Type	Description
tokenId indexed	uint256	undefined
royaltyRecipient indexed	address	undefined
royaltyBps	uint256	undefined

TransferBatch

event TransferBatch(address indexed _operator, address indexed _from, address indexed _to, uint256[] _ids, uint256[] _values)

Parameters

Name	Type	Description
_operator indexed	address	undefined
_from indexed	address	undefined
_to indexed	address	undefined
_ids	uint256[]	undefined
_values	uint256[]	undefined

TransferSingle

event TransferSingle(address indexed _operator, address indexed _from, address indexed _to, uint256 _id, uint256 _value)

Parameters

Name	Type	Description
_operator indexed	address	undefined
_from indexed	address	undefined
_to indexed	address	undefined
_id	uint256	undefined
_value	uint256	undefined

URI

event URI(string _value, uint256 indexed _id)

Parameters

Name	Type	Description
_value	string	undefined
_id indexed	uint256	undefined