About
Stats
Public Functions
46
Event Types
14
Code Size
92,010 bytes
Events (14) keyboard_arrow_up
Constants (10) keyboard_arrow_up
State Variables (31) keyboard_arrow_up
tokenIdByGenerationAndHash Variable
mapping(uint8 => mapping(uint256 => uint256)) help
Internal Variable
tokenIdByGenerationWaveAndSerial Variable
mapping(uint8 => mapping(uint8 => mapping(uint256 => uint256))) help
Internal Variable
traitIdByGenerationGeneAndVariation Variable
mapping(uint8 => mapping(uint8 => mapping(uint8 => uint256))) help
Internal Variable
Functions
balanceOf keyboard_arrow_up
Source Code
function balanceOf(address owner) public view returns (uint256) {
require(owner != address(0), "ERC721: balance query for the zero address");
return _ownedTokensCount[owner].current();
}
ownerOf keyboard_arrow_up
Source Code
function ownerOf(uint256 tokenId) public view returns (address) {
address owner = _tokenOwner[tokenId];
require(owner != address(0), "ERC721: owner query for nonexistent token");
return owner;
}
safeTransferFrom keyboard_arrow_up
Requirements help
Source Code
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public {
safeTransferFrom(from, to, tokenId, "");
}
transferFrom keyboard_arrow_up
Requirements help
Source Code
function transferFrom(
address from,
address to,
uint256 tokenId
) public {
//solhint-disable-next-line max-line-length
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_transferFrom(from, to, tokenId);
}
approve keyboard_arrow_up
Requirements help
Source Code
function approve(address to, uint256 tokenId) public {
address owner = ownerOf(tokenId);
require(to != owner, "ERC721: approval to current owner");
require(
_msgSender() == owner || isApprovedForAll(owner, _msgSender()),
"ERC721: approve caller is not owner nor approved for all"
);
_tokenApprovals[tokenId] = to;
emit Approval(owner, to, tokenId);
}
getApproved keyboard_arrow_up
Requirements help
null
Source Code
function getApproved(uint256 tokenId) public view returns (address) {
require(_exists(tokenId), "ERC721: approved query for nonexistent token");
return _tokenApprovals[tokenId];
}
setApprovalForAll keyboard_arrow_up
Requirements help
Source Code
function setApprovalForAll(address to, bool approved) public {
require(to != _msgSender(), "ERC721: approve to caller");
_operatorApprovals[_msgSender()][to] = approved;
emit ApprovalForAll(_msgSender(), to, approved);
}
isApprovedForAll keyboard_arrow_up
safeTransferFrom keyboard_arrow_up
Requirements help
Source Code
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public {
require(
_isApprovedOrOwner(_msgSender(), tokenId),
"ERC721: transfer caller is not owner nor approved"
);
_safeTransferFrom(from, to, tokenId, _data);
}
name keyboard_arrow_up
symbol keyboard_arrow_up
tokenURI keyboard_arrow_up
Requirements help
null
Source Code
function tokenURI(uint256 tokenId) external view returns (string memory) {
require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");
return _tokenURIs[tokenId];
}
supportsInterface keyboard_arrow_up
totalSupply keyboard_arrow_up
tokenOfOwnerByIndex keyboard_arrow_up
Source Code
function tokenOfOwnerByIndex(address owner, uint256 index)
public
view
returns (uint256)
{
require(
index < balanceOf(owner),
"ERC721Enumerable: owner index out of bounds"
);
return _ownedTokens[owner][index];
}
tokenByIndex keyboard_arrow_up
Requirements help
Source Code
function tokenByIndex(uint256 index) public view returns (uint256) {
require(
index < totalSupply(),
"ERC721Enumerable: global index out of bounds"
);
return _allTokens[index];
}
upgradeContract keyboard_arrow_up
addMinter keyboard_arrow_up
Modifiers help
onlySysAdmin checks for the following:
Source Code
function addMinter(address _minterAddress) external onlySysAdmin {
minters.add(_minterAddress);
require(minters.has(_minterAddress));
}
addOwner keyboard_arrow_up
Modifiers help
onlySysAdmin checks for the following:
Source Code
function addOwner(address _ownerAddress) external onlySysAdmin {
owners.add(_ownerAddress);
require(owners.has(_ownerAddress));
}
addSysAdmin keyboard_arrow_up
Modifiers help
onlySysAdmin checks for the following:
Source Code
function addSysAdmin(address _sysAdminAddress) external onlySysAdmin {
admins.add(_sysAdminAddress);
require(admins.has(_sysAdminAddress));
}
stripRoles keyboard_arrow_up
Modifiers help
onlyOwner checks for the following:
Requirements help
Source Code
function stripRoles(address _address) external onlyOwner {
require(msg.sender != _address);
bool stripped = false;
if (admins.has(_address)) {
admins.remove(_address);
stripped = true;
}
if (minters.has(_address)) {
minters.remove(_address);
stripped = true;
}
if (owners.has(_address)) {
owners.remove(_address);
stripped = true;
}
require(stripped == true);
}
pause keyboard_arrow_up
unpause keyboard_arrow_up
getTraitIdByGenerationGeneAndVariation keyboard_arrow_up
Source Code
function getTraitIdByGenerationGeneAndVariation(
Generation _generation,
Gene _gene,
uint8 _variation
) external view returns (uint256 traitId) {
return
traitIdByGenerationGeneAndVariation[uint8(_generation)][uint8(_gene)][
_variation
];
}
getTraitInfoById keyboard_arrow_up
Requirements help
Source Code
function getTraitInfoById(uint256 _traitId)
external
view
returns (
uint256 id,
Generation generation,
Series[] memory series,
Gender gender,
Gene gene,
Rarity rarity,
uint8 variation,
string memory name
)
{
require(_traitId < traits.length);
Trait memory trait = traits[_traitId];
return (
trait.id,
trait.generation,
trait.series,
trait.gender,
trait.gene,
trait.rarity,
trait.variation,
trait.name
);
}
getTraitNameById keyboard_arrow_up
Requirements help
Source Code
function getTraitNameById(uint256 _traitId)
external
view
returns (string memory name)
{
require(_traitId < traits.length);
name = traits[_traitId].name;
}
getTraitArtById keyboard_arrow_up
getAttributionByGeneration keyboard_arrow_up
Requirements help
Source Code
function getAttributionByGeneration(Generation _generation)
external
view
returns (string memory attribution)
{
Attribution memory attrib = attributionByGeneration[uint8(_generation)];
require(bytes(attrib.artist).length > 0);
attribution = strConcat(attribution, attrib.artist);
attribution = strConcat(attribution, " (");
attribution = strConcat(attribution, attrib.infoURI);
attribution = strConcat(attribution, ")");
}
setAttribution keyboard_arrow_up
Modifiers help
onlySysAdmin checks for the following:
onlyBeforeProd checks for the following:
Requirements help
Source Code
function setAttribution(
Generation _generation,
string calldata _artist,
string calldata _infoURI
) external onlySysAdmin onlyBeforeProd(_generation) {
require(bytes(_artist).length > 0 && bytes(_infoURI).length > 0);
attributionByGeneration[uint8(_generation)] = Attribution(
_generation,
_artist,
_infoURI
);
emit AttributionSet(_generation, _artist, _infoURI);
}
createTrait keyboard_arrow_up
Parameters help
Modifiers help
onlySysAdmin checks for the following:
whenNotPaused checks for the following:
onlyBeforeProd checks for the following:
Requirements help
Source Code
function createTrait(
Generation _generation,
Series[] calldata _series,
Gender _gender,
Gene _gene,
Rarity _rarity,
uint8 _variation,
string calldata _name,
string calldata _svg
)
external
onlySysAdmin
whenNotPaused
onlyBeforeProd(_generation)
returns (uint256 traitId)
{
require(_series.length > 0);
require(bytes(_name).length > 0);
require(bytes(_svg).length > 0);
// Get Trait ID
traitId = traits.length;
// Create and store trait
traits.push(
Trait(
traitId,
_generation,
_gender,
_gene,
_rarity,
_variation,
_series,
_name,
_svg
)
);
// Create generation/gene/variation to traitId mapping required by assembleArtwork
traitIdByGenerationGeneAndVariation[uint8(_generation)][uint8(_gene)][
uint8(_variation)
] = traitId;
// Send the NewTrait event
emit NewTrait(traitId, _generation, _gene, _rarity, _variation, _name);
// Return the new Trait ID
return traitId;
}
extendTraitArt keyboard_arrow_up
Modifiers help
onlySysAdmin checks for the following:
whenNotPaused checks for the following:
onlyBeforeProd checks for the following:
Requirements help
Source Code
function extendTraitArt(uint256 _traitId, string calldata _svg)
external
onlySysAdmin
whenNotPaused
onlyBeforeProd(traits[_traitId].generation)
{
require(_traitId < traits.length);
string memory art = strConcat(traits[_traitId].svg, _svg);
traits[_traitId].svg = art;
emit TraitArtExtended(_traitId);
}
getAvastarWaveByTokenId keyboard_arrow_up
Requirements help
Source Code
function getAvastarWaveByTokenId(uint256 _tokenId)
external
view
returns (Wave wave)
{
require(_tokenId < avastars.length);
wave = avastars[_tokenId].wave;
}
renderAvastar keyboard_arrow_up
Requirements help
Source Code
function renderAvastar(uint256 _tokenId)
external
view
returns (string memory svg)
{
require(_tokenId < avastars.length);
Avastar memory avastar = avastars[_tokenId];
uint256 traits = (avastar.wave == Wave.PRIME)
? primesByGeneration[uint8(avastar.generation)][avastar.serial].traits
: replicantsByGeneration[uint8(avastar.generation)][avastar.serial].traits;
svg = assembleArtwork(avastar.generation, traits);
}
getPrimeByGenerationAndSerial keyboard_arrow_up
Requirements help
Source Code
function getPrimeByGenerationAndSerial(Generation _generation, uint256 _serial)
external
view
returns (
uint256 tokenId,
uint256 serial,
uint256 traits,
Generation generation,
Series series,
Gender gender,
uint8 ranking
)
{
require(_serial < primesByGeneration[uint8(_generation)].length);
Prime memory prime = primesByGeneration[uint8(_generation)][_serial];
return (
prime.id,
prime.serial,
prime.traits,
prime.generation,
prime.series,
prime.gender,
prime.ranking
);
}
getPrimeByTokenId keyboard_arrow_up
Requirements help
Source Code
function getPrimeByTokenId(uint256 _tokenId)
external
view
returns (
uint256 tokenId,
uint256 serial,
uint256 traits,
Generation generation,
Series series,
Gender gender,
uint8 ranking
)
{
require(_tokenId < avastars.length);
Avastar memory avastar = avastars[_tokenId];
require(avastar.wave == Wave.PRIME);
Prime memory prime = primesByGeneration[uint8(avastar.generation)][
avastar.serial
];
return (
prime.id,
prime.serial,
prime.traits,
prime.generation,
prime.series,
prime.gender,
prime.ranking
);
}
getPrimeReplicationByTokenId keyboard_arrow_up
Requirements help
Source Code
function getPrimeReplicationByTokenId(uint256 _tokenId)
external
view
returns (uint256 tokenId, bool[12] memory replicated)
{
require(_tokenId < avastars.length);
Avastar memory avastar = avastars[_tokenId];
require(avastar.wave == Wave.PRIME);
Prime memory prime = primesByGeneration[uint8(avastar.generation)][
avastar.serial
];
return (prime.id, prime.replicated);
}
mintPrime keyboard_arrow_up
Parameters help
Modifiers help
onlyMinter checks for the following:
whenNotPaused checks for the following:
Requirements help
Source Code
function mintPrime(
address _owner,
uint256 _traits,
Generation _generation,
Series _series,
Gender _gender,
uint8 _ranking
) external onlyMinter whenNotPaused returns (uint256 tokenId, uint256 serial) {
require(_owner != address(0));
require(_traits != 0);
require(isHashUsedByGeneration[uint8(_generation)][_traits] == false);
require(_ranking > 0 && _ranking <= 100);
uint16 count = primeCountByGenAndSeries[uint8(_generation)][uint8(_series)];
if (_series != Series.PROMO) {
require(count < MAX_PRIMES_PER_SERIES);
} else {
require(count < MAX_PROMO_PRIMES_PER_GENERATION);
}
// Get Prime Serial and mint Avastar, getting tokenId
serial = primesByGeneration[uint8(_generation)].length;
tokenId = mintAvastar(_owner, serial, _traits, _generation, Wave.PRIME);
// Create and store Prime struct
bool[12] memory replicated;
primesByGeneration[uint8(_generation)].push(
Prime(
tokenId,
serial,
_traits,
replicated,
_generation,
_series,
_gender,
_ranking
)
);
// Increment count for given Generation/Series
primeCountByGenAndSeries[uint8(_generation)][uint8(_series)]++;
// Send the NewPrime event
emit NewPrime(tokenId, serial, _generation, _series, _gender, _traits);
// Return the tokenId, serial
return (tokenId, serial);
}
getReplicantByGenerationAndSerial keyboard_arrow_up
Requirements help
Source Code
function getReplicantByGenerationAndSerial(
Generation _generation,
uint256 _serial
)
external
view
returns (
uint256 tokenId,
uint256 serial,
uint256 traits,
Generation generation,
Gender gender,
uint8 ranking
)
{
require(_serial < replicantsByGeneration[uint8(_generation)].length);
Replicant memory replicant = replicantsByGeneration[uint8(_generation)][
_serial
];
return (
replicant.id,
replicant.serial,
replicant.traits,
replicant.generation,
replicant.gender,
replicant.ranking
);
}
getReplicantByTokenId keyboard_arrow_up
Requirements help
Source Code
function getReplicantByTokenId(uint256 _tokenId)
external
view
returns (
uint256 tokenId,
uint256 serial,
uint256 traits,
Generation generation,
Gender gender,
uint8 ranking
)
{
require(_tokenId < avastars.length);
Avastar memory avastar = avastars[_tokenId];
require(avastar.wave == Wave.REPLICANT);
Replicant memory replicant = replicantsByGeneration[
uint8(avastar.generation)
][avastar.serial];
return (
replicant.id,
replicant.serial,
replicant.traits,
replicant.generation,
replicant.gender,
replicant.ranking
);
}
mintReplicant keyboard_arrow_up
Parameters help
Modifiers help
onlyMinter checks for the following:
whenNotPaused checks for the following:
Requirements help
Source Code
function mintReplicant(
address _owner,
uint256 _traits,
Generation _generation,
Gender _gender,
uint8 _ranking
) external onlyMinter whenNotPaused returns (uint256 tokenId, uint256 serial) {
require(_traits != 0);
require(isHashUsedByGeneration[uint8(_generation)][_traits] == false);
require(_ranking > 0 && _ranking <= 100);
require(
replicantCountByGeneration[uint8(_generation)] <
MAX_REPLICANTS_PER_GENERATION
);
// Get Replicant Serial and mint Avastar, getting tokenId
serial = replicantsByGeneration[uint8(_generation)].length;
tokenId = mintAvastar(_owner, serial, _traits, _generation, Wave.REPLICANT);
// Create and store Replicant struct
replicantsByGeneration[uint8(_generation)].push(
Replicant(tokenId, serial, _traits, _generation, _gender, _ranking)
);
// Increment count for given Generation
replicantCountByGeneration[uint8(_generation)]++;
// Send the NewReplicant event
emit NewReplicant(tokenId, serial, _generation, _gender, _traits);
// Return the tokenId, serial
return (tokenId, serial);
}
isAvastarTeleporter keyboard_arrow_up
setMetadataContractAddress keyboard_arrow_up
Modifiers help
Source Code
function setMetadataContractAddress(address _address)
external
onlySysAdmin
whenPaused
whenNotUpgraded
{
// Cast the candidate contract to the IAvastarMetadata interface
IAvastarMetadata candidateContract = IAvastarMetadata(_address);
// Verify that we have the appropriate address
require(candidateContract.isAvastarMetadata());
// Set the contract address
metadataContractAddress = _address;
// Emit the event
emit MetadataContractAddressSet(_address);
}
getMetadataContractAddress keyboard_arrow_up
tokenURI keyboard_arrow_up
Requirements help
Source Code
function tokenURI(uint256 _tokenId) external view returns (string memory uri) {
require(_tokenId < avastars.length);
return IAvastarMetadata(metadataContractAddress).tokenURI(_tokenId);
}
approveTraitAccess keyboard_arrow_up
Requirements help
approvedAtLeast1 must be true
Source Code
function approveTraitAccess(address _handler, uint256[] calldata _primeIds)
external
{
require(_primeIds.length > 0 && _primeIds.length <= 256);
uint256 primeId;
bool approvedAtLeast1 = false;
for (uint8 i = 0; i < _primeIds.length; i++) {
primeId = _primeIds[i];
require(primeId < avastars.length);
require(msg.sender == super.ownerOf(primeId), "Must be token owner");
if (traitHandlerByPrimeTokenId[primeId] != _handler) {
traitHandlerByPrimeTokenId[primeId] = _handler;
approvedAtLeast1 = true;
}
}
require(approvedAtLeast1, "No unhandled primes specified");
// Emit the event
emit TraitAccessApproved(_handler, _primeIds);
}
useTraits keyboard_arrow_up
Requirements help
One or more of the following:
-
the sender's address
must be equal to
traitHandlerByPrimeTokenId for _primeId
- OR
the sender's address
must be equal to
UNKNOWN VALUE
usedAtLeast1 must be true
Source Code
function useTraits(uint256 _primeId, bool[12] calldata _traitFlags) external {
// Make certain token id is valid
require(_primeId < avastars.length);
// Make certain caller is token owner OR approved handler
require(
msg.sender == super.ownerOf(_primeId) ||
msg.sender == traitHandlerByPrimeTokenId[_primeId],
"Must be token owner or approved handler"
);
// Get the Avastar and make sure it's a Prime
Avastar memory avastar = avastars[_primeId];
require(avastar.wave == Wave.PRIME);
// Get the Prime
Prime storage prime = primesByGeneration[uint8(avastar.generation)][
avastar.serial
];
// Set the flags.
bool usedAtLeast1;
for (uint8 i = 0; i < 12; i++) {
if (_traitFlags.length > i) {
if (!prime.replicated[i] && _traitFlags[i]) {
prime.replicated[i] = true;
usedAtLeast1 = true;
}
} else {
break;
}
}
// Revert if no flags changed
require(usedAtLeast1, "No reusable traits specified");
// Clear trait handler
traitHandlerByPrimeTokenId[_primeId] = address(0);
// Emit the TraitsUsed event
emit TraitsUsed(msg.sender, _primeId, prime.replicated);
}
Internal Functions
Internal functions are parts of the contract that can't be used directly, but instead are used by the public functions listed above.
internal AvastarFactory.mintAvastar keyboard_arrow_up
Parameters help
Requirements help
Source Code
function mintAvastar(
address _owner,
uint256 _serial,
uint256 _traits,
Generation _generation,
Wave _wave
) internal whenNotPaused returns (uint256 tokenId) {
// Mapped Token Id for given generation and serial should always be 0 (uninitialized)
require(
tokenIdByGenerationWaveAndSerial[uint8(_generation)][uint8(_wave)][
_serial
] == 0
);
// Serial should always be the current length of the primes or replicants array for the given generation
if (_wave == Wave.PRIME) {
require(_serial == primesByGeneration[uint8(_generation)].length);
} else {
require(_serial == replicantsByGeneration[uint8(_generation)].length);
}
// Get Token ID
tokenId = avastars.length;
// Create and store Avastar token
Avastar memory avastar = Avastar(
tokenId,
_serial,
_traits,
_generation,
_wave
);
// Store the avastar
avastars.push(avastar);
// Indicate use of Trait Hash within given generation
isHashUsedByGeneration[uint8(avastar.generation)][avastar.traits] = true;
// Store token ID by Generation and Trait Hash
tokenIdByGenerationAndHash[uint8(avastar.generation)][
avastar.traits
] = avastar.id;
// Create generation/wave/serial to tokenId mapping
tokenIdByGenerationWaveAndSerial[uint8(avastar.generation)][
uint8(avastar.wave)
][avastar.serial] = avastar.id;
// Mint the token
super._mint(_owner, tokenId);
}
internal TraitFactory.assembleArtwork keyboard_arrow_up
Requirements help
Source Code
function assembleArtwork(Generation _generation, uint256 _traitHash)
internal
view
returns (string memory svg)
{
require(_traitHash > 0);
string memory accumulator
= '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" height="1000px" width="1000px" viewBox="0 0 1000 1000">';
uint256 slotConst = 256;
uint256 slotMask = 255;
uint256 bitMask;
uint256 slottedValue;
uint256 slotMultiplier;
uint256 variation;
uint256 traitId;
Trait memory trait;
// Iterate trait hash by Gene and assemble SVG sandwich
for (uint8 slot = 0; slot <= uint8(Gene.HAIR_STYLE); slot++) {
slotMultiplier = uint256(slotConst**slot); // Create slot multiplier
bitMask = slotMask * slotMultiplier; // Create bit mask for slot
slottedValue = _traitHash & bitMask; // Extract slotted value from hash
if (slottedValue > 0) {
variation = (slot > 0) // Extract variation from slotted value
? slottedValue / slotMultiplier
: slottedValue;
if (variation > 0) {
traitId = traitIdByGenerationGeneAndVariation[uint8(_generation)][slot][
uint8(variation)
];
trait = traits[traitId];
accumulator = strConcat(accumulator, trait.svg);
}
}
}
return strConcat(accumulator, "</svg>");
}
internal AvastarBase.uintToStr keyboard_arrow_up
Source Code
function uintToStr(uint256 _i) internal pure returns (string memory result) {
if (_i == 0) {
return "0";
}
uint256 j = _i;
uint256 len;
while (j != 0) {
len++;
j /= 10;
}
bytes memory bstr = new bytes(len);
uint256 k = len - 1;
while (_i != 0) {
bstr[k--] = byte(uint8(48 + (_i % 10)));
_i /= 10;
}
result = string(bstr);
}
internal AvastarBase.strConcat keyboard_arrow_up
internal ERC721._safeTransferFrom keyboard_arrow_up
Requirements help
Source Code
function _safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal {
_transferFrom(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._exists keyboard_arrow_up
internal ERC721._isApprovedOrOwner keyboard_arrow_up
Requirements help
null
Source Code
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
returns (bool)
{
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(address to, uint256 tokenId) internal {
_safeMint(to, tokenId, "");
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._mint keyboard_arrow_up
Requirements help
Source Code
function _mint(address to, uint256 tokenId) internal {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_tokenOwner[tokenId] = to;
_ownedTokensCount[to].increment();
emit Transfer(address(0), to, tokenId);
}
internal ERC721._burn keyboard_arrow_up
Source Code
function _burn(address owner, uint256 tokenId) internal {
require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");
_clearApproval(tokenId);
_ownedTokensCount[owner].decrement();
_tokenOwner[tokenId] = address(0);
emit Transfer(owner, address(0), tokenId);
}
internal ERC721._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(uint256 tokenId) internal {
_burn(ownerOf(tokenId), tokenId);
}
internal ERC721._transferFrom keyboard_arrow_up
Requirements help
Source Code
function _transferFrom(
address from,
address to,
uint256 tokenId
) internal {
require(
ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
_clearApproval(tokenId);
_ownedTokensCount[from].decrement();
_ownedTokensCount[to].increment();
_tokenOwner[tokenId] = to;
emit Transfer(from, to, tokenId);
}
internal ERC721._checkOnERC721Received keyboard_arrow_up
Source Code
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal returns (bool) {
if (!to.isContract()) {
return true;
}
bytes4 retval = IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
);
return (retval == _ERC721_RECEIVED);
}
internal ERC721._clearApproval keyboard_arrow_up
internal Context.constructor keyboard_arrow_up
internal Context._msgSender keyboard_arrow_up
internal Context._msgData keyboard_arrow_up
Parameters help
This function has no parameters.
Source Code
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
internal ERC165.constructor keyboard_arrow_up
internal ERC165._registerInterface keyboard_arrow_up
Requirements help
Source Code
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
internal ERC721Enumerable._transferFrom keyboard_arrow_up
Requirements help
Source Code
function _transferFrom(
address from,
address to,
uint256 tokenId
) internal {
super._transferFrom(from, to, tokenId);
_removeTokenFromOwnerEnumeration(from, tokenId);
_addTokenToOwnerEnumeration(to, tokenId);
}
internal ERC721Enumerable._mint keyboard_arrow_up
Requirements help
Source Code
function _mint(address to, uint256 tokenId) internal {
super._mint(to, tokenId);
_addTokenToOwnerEnumeration(to, tokenId);
_addTokenToAllTokensEnumeration(tokenId);
}
internal ERC721Enumerable._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(address owner, uint256 tokenId) internal {
super._burn(owner, tokenId);
_removeTokenFromOwnerEnumeration(owner, tokenId);
// Since tokenId will be deleted, we can clear its slot in _ownedTokensIndex to trigger a gas refund
_ownedTokensIndex[tokenId] = 0;
_removeTokenFromAllTokensEnumeration(tokenId);
}
internal ERC721Enumerable._tokensOfOwner keyboard_arrow_up
internal ERC721Enumerable._addTokenToOwnerEnumeration keyboard_arrow_up
Source Code
function _addTokenToOwnerEnumeration(address to, uint256 tokenId) private {
_ownedTokensIndex[tokenId] = _ownedTokens[to].length;
_ownedTokens[to].push(tokenId);
}
internal ERC721Enumerable._addTokenToAllTokensEnumeration keyboard_arrow_up
internal ERC721Enumerable._removeTokenFromOwnerEnumeration keyboard_arrow_up
Source Code
function _removeTokenFromOwnerEnumeration(address from, uint256 tokenId)
private
{
// To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _ownedTokens[from].length.sub(1);
uint256 tokenIndex = _ownedTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary
if (tokenIndex != lastTokenIndex) {
uint256 lastTokenId = _ownedTokens[from][lastTokenIndex];
_ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
}
// This also deletes the contents at the last position of the array
_ownedTokens[from].length--;
// Note that _ownedTokensIndex[tokenId] hasn't been cleared: it still points to the old slot (now occupied by
// lastTokenId, or just over the end of the array if the token was the last one).
}
internal ERC721Enumerable._removeTokenFromAllTokensEnumeration keyboard_arrow_up
Source Code
function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private {
// To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and
// then delete the last slot (swap and pop).
uint256 lastTokenIndex = _allTokens.length.sub(1);
uint256 tokenIndex = _allTokensIndex[tokenId];
// When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so
// rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding
// an 'if' statement (like in _removeTokenFromOwnerEnumeration)
uint256 lastTokenId = _allTokens[lastTokenIndex];
_allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token
_allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index
// This also deletes the contents at the last position of the array
_allTokens.length--;
_allTokensIndex[tokenId] = 0;
}
internal Context.constructor keyboard_arrow_up
internal Context._msgSender keyboard_arrow_up
internal Context._msgData keyboard_arrow_up
Parameters help
This function has no parameters.
Source Code
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
internal ERC165.constructor keyboard_arrow_up
internal ERC165._registerInterface keyboard_arrow_up
Requirements help
Source Code
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
internal ERC721._safeTransferFrom keyboard_arrow_up
Requirements help
Source Code
function _safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal {
_transferFrom(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._exists keyboard_arrow_up
internal ERC721._isApprovedOrOwner keyboard_arrow_up
Requirements help
null
Source Code
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
returns (bool)
{
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(address to, uint256 tokenId) internal {
_safeMint(to, tokenId, "");
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._mint keyboard_arrow_up
Requirements help
Source Code
function _mint(address to, uint256 tokenId) internal {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_tokenOwner[tokenId] = to;
_ownedTokensCount[to].increment();
emit Transfer(address(0), to, tokenId);
}
internal ERC721._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(address owner, uint256 tokenId) internal {
require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");
_clearApproval(tokenId);
_ownedTokensCount[owner].decrement();
_tokenOwner[tokenId] = address(0);
emit Transfer(owner, address(0), tokenId);
}
internal ERC721._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(uint256 tokenId) internal {
_burn(ownerOf(tokenId), tokenId);
}
internal ERC721._transferFrom keyboard_arrow_up
Requirements help
Source Code
function _transferFrom(
address from,
address to,
uint256 tokenId
) internal {
require(
ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
_clearApproval(tokenId);
_ownedTokensCount[from].decrement();
_ownedTokensCount[to].increment();
_tokenOwner[tokenId] = to;
emit Transfer(from, to, tokenId);
}
internal ERC721._checkOnERC721Received keyboard_arrow_up
Source Code
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal returns (bool) {
if (!to.isContract()) {
return true;
}
bytes4 retval = IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
);
return (retval == _ERC721_RECEIVED);
}
internal ERC721._clearApproval keyboard_arrow_up
internal Context.constructor keyboard_arrow_up
internal Context._msgSender keyboard_arrow_up
internal Context._msgData keyboard_arrow_up
Parameters help
This function has no parameters.
Source Code
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
internal ERC165.constructor keyboard_arrow_up
internal ERC165._registerInterface keyboard_arrow_up
Requirements help
Source Code
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
internal ERC721Metadata._setTokenURI keyboard_arrow_up
Requirements help
null
Source Code
function _setTokenURI(uint256 tokenId, string memory uri) internal {
require(_exists(tokenId), "ERC721Metadata: URI set of nonexistent token");
_tokenURIs[tokenId] = uri;
}
internal ERC721Metadata._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(address owner, uint256 tokenId) internal {
super._burn(owner, tokenId);
// Clear metadata (if any)
if (bytes(_tokenURIs[tokenId]).length != 0) {
delete _tokenURIs[tokenId];
}
}
internal Context.constructor keyboard_arrow_up
internal Context._msgSender keyboard_arrow_up
internal Context._msgData keyboard_arrow_up
Parameters help
This function has no parameters.
Source Code
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
internal ERC165.constructor keyboard_arrow_up
internal ERC165._registerInterface keyboard_arrow_up
Requirements help
Source Code
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
internal ERC721._safeTransferFrom keyboard_arrow_up
Requirements help
Source Code
function _safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal {
_transferFrom(from, to, tokenId);
require(
_checkOnERC721Received(from, to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._exists keyboard_arrow_up
internal ERC721._isApprovedOrOwner keyboard_arrow_up
Requirements help
null
Source Code
function _isApprovedOrOwner(address spender, uint256 tokenId)
internal
view
returns (bool)
{
require(_exists(tokenId), "ERC721: operator query for nonexistent token");
address owner = ownerOf(tokenId);
return (spender == owner ||
getApproved(tokenId) == spender ||
isApprovedForAll(owner, spender));
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(address to, uint256 tokenId) internal {
_safeMint(to, tokenId, "");
}
internal ERC721._safeMint keyboard_arrow_up
Requirements help
Source Code
function _safeMint(
address to,
uint256 tokenId,
bytes memory _data
) internal {
_mint(to, tokenId);
require(
_checkOnERC721Received(address(0), to, tokenId, _data),
"ERC721: transfer to non ERC721Receiver implementer"
);
}
internal ERC721._mint keyboard_arrow_up
Requirements help
Source Code
function _mint(address to, uint256 tokenId) internal {
require(to != address(0), "ERC721: mint to the zero address");
require(!_exists(tokenId), "ERC721: token already minted");
_tokenOwner[tokenId] = to;
_ownedTokensCount[to].increment();
emit Transfer(address(0), to, tokenId);
}
internal ERC721._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(address owner, uint256 tokenId) internal {
require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");
_clearApproval(tokenId);
_ownedTokensCount[owner].decrement();
_tokenOwner[tokenId] = address(0);
emit Transfer(owner, address(0), tokenId);
}
internal ERC721._burn keyboard_arrow_up
Requirements help
Source Code
function _burn(uint256 tokenId) internal {
_burn(ownerOf(tokenId), tokenId);
}
internal ERC721._transferFrom keyboard_arrow_up
Requirements help
Source Code
function _transferFrom(
address from,
address to,
uint256 tokenId
) internal {
require(
ownerOf(tokenId) == from,
"ERC721: transfer of token that is not own"
);
require(to != address(0), "ERC721: transfer to the zero address");
_clearApproval(tokenId);
_ownedTokensCount[from].decrement();
_ownedTokensCount[to].increment();
_tokenOwner[tokenId] = to;
emit Transfer(from, to, tokenId);
}
internal ERC721._checkOnERC721Received keyboard_arrow_up
Source Code
function _checkOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) internal returns (bool) {
if (!to.isContract()) {
return true;
}
bytes4 retval = IERC721Receiver(to).onERC721Received(
_msgSender(),
from,
tokenId,
_data
);
return (retval == _ERC721_RECEIVED);
}
internal ERC721._clearApproval keyboard_arrow_up
internal Context.constructor keyboard_arrow_up
internal Context._msgSender keyboard_arrow_up
internal Context._msgData keyboard_arrow_up
Parameters help
This function has no parameters.
Source Code
function _msgData() internal view returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
internal ERC165.constructor keyboard_arrow_up
internal ERC165._registerInterface keyboard_arrow_up
Requirements help
Source Code
function _registerInterface(bytes4 interfaceId) internal {
require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
_supportedInterfaces[interfaceId] = true;
}
