NonFungibleTokenDO

DataObject to interact with non-fungible tokens

This contract is used to manage non-fungible tokens where a Data Object contract is used to store the token data

InsufficientBalance

error InsufficientBalance(bytes32 diid, uint256 currentBalance, uint256 balance, uint256 tokenId)

Error thrown when the balance is insufficient

Parameters

Name	Type	Description
diid	bytes32	The owner identifier
currentBalance	uint256	The current balance of the owner
balance	uint256	The balance to decrease
tokenId	uint256	The token id

ArrayLengthMismatch

error ArrayLengthMismatch()

Error thrown when the params length mismatch

InvalidBatchOrder

error InvalidBatchOrder()

Error thrown when tokens are sent out of order

TokenAlreadyExists

error TokenAlreadyExists(uint256 tokenId)

Error thrown when the token to mint already exists

Parameters

Name	Type	Description
tokenId	uint256	The token id

TokenNotOwned

error TokenNotOwned(uint256 tokenId)

Error thrown when the token to burn is not owned by the account

Parameters

Name	Type	Description
tokenId	uint256	The token id

DpData

Data structure for Non Fungible Token data

Parameters

Name	Type	Description

struct DpData {
  mapping(uint256 => address) owners;
}

DiidData

Data structure for Non Fungible Token owner data

Parameters

Name	Type	Description

struct DiidData {
  uint256 balance;
}

constructor

constructor() public

onDataPointTransfer

function onDataPointTransfer(DataPoint dp, bytes32 fromDiid, bytes32 toDiid) external

Transfers data from one id to another

onDataPointTransfer in this implementation does nothing

Parameters

Name	Type	Description
dp	DataPoint	Identifier of the DataPoint
fromDiid	bytes32	ID to transfer from
toDiid	bytes32	ID to transfer to

_dispatchRead

function _dispatchRead(DataPoint dp, bytes4 operation, bytes data) internal view returns (bytes)

_dispatchWrite

function _dispatchWrite(DataPoint dp, bytes4 operation, bytes data) internal virtual returns (bytes)

_balanceOf

function _balanceOf(DataPoint dp, address account) internal view returns (uint256)

Operation used to get the balance of an account

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
account	address	The account address

Return Values

Name	Type	Description
[0]	uint256	The balance of the account

_ownerOf

function _ownerOf(DataPoint dp, uint256 tokenId) internal view returns (address)

Operation used to get the owner of a token

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
tokenId	uint256	The token id

Return Values

Name	Type	Description
[0]	address	The owner of the token

_mint

function _mint(DataPoint dp, address to, uint256 tokenId) internal virtual

Operation used to mint new token

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
to	address	The account address to mint the token to
tokenId	uint256	The tokenId of token to mint

_burn

function _burn(DataPoint dp, address from, uint256 tokenId) internal

Operation used to burn a token

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
from	address	The account address to burn the token from
tokenId	uint256	The tokenId of token to burn

_transferFrom

function _transferFrom(DataPoint dp, address from, address to, uint256 tokenId) internal

Operation used to transfer token

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
from	address	The account address to transfer the token from
to	address	The account address to transfer the token to
tokenId	uint256	The tokenId of token to transfer

_batchTransferFrom

function _batchTransferFrom(DataPoint dp, address from, address to, uint256[] tokenIds) internal

Operation used to transfer batch of tokens

If the balance is insufficient, the operation will revert with tokenId 0 and not the actual tokenId that caused the error, to save gas

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
from	address	The account address to transfer the tokens from
to	address	The account address to transfer the tokens to
tokenIds	uint256[]	The tokenIds of tokens to transfer

_batchTransferFrom

function _batchTransferFrom(DataPoint dp, address from, address[] to, uint256[] tokenIds) internal

Operation used to transfer batch of tokens

If the balance is insufficient, the operation will revert with tokenId 0 and not the actual tokenId that caused the error, to save gas NOTE: The token ids array MUST have at least 2 elements and all elements MUST be in ASCENDING order

Parameters

Name	Type	Description
dp	DataPoint	DataPoint identifier
from	address	The account address to transfer the tokens from
to	address[]	The accounts addresses to transfer the tokens to
tokenIds	uint256[]	The tokenIds of tokens to transfer

_increaseBalance

function _increaseBalance(struct NonFungibleTokenDO.DiidData diidd, DataPoint, bytes32, uint256 balance) internal

_decreaseBalance

function _decreaseBalance(struct NonFungibleTokenDO.DiidData diidd, DataPoint, bytes32 diidFrom, uint256 balance, uint256 tokenId) internal

_dpData

function _dpData(DataPoint dp) internal returns (struct NonFungibleTokenDO.DpData)

_diidData

function _diidData(DataPoint dp, bytes32 diid) internal returns (struct NonFungibleTokenDO.DiidData)

_tryDpData

function _tryDpData(DataPoint dp) internal view returns (bool, struct NonFungibleTokenDO.DpData)

_tryDiidData

function _tryDiidData(DataPoint dp, bytes32 diid) internal view returns (bool, struct NonFungibleTokenDO.DiidData)

NonFungibleTokenDO

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