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| Set Approval For... | 22943657 | 119 days ago | IN | 0 ETH | 0.00018245 | ||||
| Set Approval For... | 21075255 | 380 days ago | IN | 0 ETH | 0.00053676 | ||||
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Minimal Proxy Contract for 0xea724d3b05cf59d3c8924b091fe6ed97568a685a
Contract Name:
Archetype
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
// Archetype v0.3.3
//
// d8888 888 888
// d88888 888 888
// d88P888 888 888
// d88P 888 888d888 .d8888b 88888b. .d88b. 888888 888 888 88888b. .d88b.
// d88P 888 888P" d88P" 888 "88b d8P Y8b 888 888 888 888 "88b d8P Y8b
// d88P 888 888 888 888 888 88888888 888 888 888 888 888 88888888
// d8888888888 888 Y88b. 888 888 Y8b. Y88b. Y88b 888 888 d88P Y8b.
// d88P 888 888 "Y8888P 888 888 "Y8888 "Y888 "Y88888 88888P" "Y8888
// 888 888
// Y8b d88P 888
// "Y88P" 888
pragma solidity ^0.8.4;
import "erc721a-upgradeable/contracts/ERC721AUpgradeable.sol";
import "erc721a-upgradeable/contracts/ERC721A__Initializable.sol";
import "./ERC721A__OwnableUpgradeable.sol";
import "solady/src/utils/MerkleProofLib.sol";
import "solady/src/utils/LibString.sol";
import "solady/src/utils/ECDSA.sol";
error InvalidConfig();
error MintNotYetStarted();
error WalletUnauthorizedToMint();
error InsufficientEthSent();
error ExcessiveEthSent();
error MaxSupplyExceeded();
error NumberOfMintsExceeded();
error MintingPaused();
error InvalidReferral();
error InvalidSignature();
error BalanceEmpty();
error TransferFailed();
error MaxBatchSizeExceeded();
error BurnToMintDisabled();
error NotTokenOwner();
error NotApprovedToTransfer();
error InvalidAmountOfTokens();
error WrongPassword();
error LockedForever();
contract Archetype is ERC721A__Initializable, ERC721AUpgradeable, ERC721A__OwnableUpgradeable {
//
// EVENTS
//
event Invited(bytes32 indexed key, bytes32 indexed cid);
event Referral(address indexed affiliate, uint128 wad, uint256 numMints);
event Withdrawal(address indexed src, uint128 wad);
//
// STRUCTS
//
struct Auth {
bytes32 key;
bytes32[] proof;
}
struct MintTier {
uint16 numMints;
uint16 mintDiscount; //BPS
}
struct Discount {
uint16 affiliateDiscount; //BPS
MintTier[] mintTiers;
}
struct Config {
string unrevealedUri;
string baseUri;
address affiliateSigner;
address ownerAltPayout; // optional alternative address for owner withdrawals.
address superAffiliatePayout; // optional super affiliate address, will receive half of platform fee if set.
uint32 maxSupply;
uint32 maxBatchSize;
uint16 affiliateFee; //BPS
uint16 platformFee; //BPS
Discount discounts;
}
struct Invite {
uint128 price;
uint64 start;
uint64 limit;
}
struct Invitelist {
bytes32 key;
bytes32 cid;
Invite invite;
}
struct OwnerBalance {
uint128 owner;
uint128 platform;
}
struct BurnConfig {
Archetype archetype;
bool enabled;
uint16 ratio;
uint64 start;
uint64 limit;
}
//
// VARIABLES
//
mapping(bytes32 => Invite) public invites;
mapping(address => mapping(bytes32 => uint256)) private minted;
mapping(address => uint128) public affiliateBalance;
mapping(uint256 => bytes) private tokenMsg;
OwnerBalance public ownerBalance;
Config public config;
BurnConfig public burnConfig;
bool public revealed;
bool public uriUnlocked;
bool public maxSupplyUnlocked;
bool public affiliateFeeUnlocked;
bool public discountsUnlocked;
bool public ownerAltPayoutUnlocked;
bool public provenanceHashUnlocked;
string public provenance;
// address private constant PLATFORM = 0x3C44CdDdB6a900fa2b585dd299e03d12FA4293BC; // TEST (account[2])
address private constant PLATFORM = 0x86B82972282Dd22348374bC63fd21620F7ED847B;
uint16 private constant MAXBPS = 5000; // max fee or discount is 50%
//
// METHODS
//
function initialize(
string memory name,
string memory symbol,
Config calldata config_
) external initializerERC721A {
__ERC721A_init(name, symbol);
// check max bps not reached and min platform fee.
if (
config_.affiliateFee > MAXBPS ||
config_.platformFee > MAXBPS ||
config_.platformFee < 500 ||
config_.discounts.affiliateDiscount > MAXBPS ||
config_.affiliateSigner == address(0) ||
config_.maxBatchSize == 0
) {
revert InvalidConfig();
}
// ensure mint tiers are correctly ordered from highest to lowest.
for (uint256 i = 1; i < config_.discounts.mintTiers.length; i++) {
if (
config_.discounts.mintTiers[i].mintDiscount > MAXBPS ||
config_.discounts.mintTiers[i].numMints > config_.discounts.mintTiers[i - 1].numMints
) {
revert InvalidConfig();
}
}
config = config_;
__Ownable_init();
revealed = true;
uriUnlocked = true;
maxSupplyUnlocked = true;
affiliateFeeUnlocked = true;
discountsUnlocked = true;
ownerAltPayoutUnlocked = true;
provenanceHashUnlocked = true;
}
//
// PUBLIC
//
function mint(
Auth calldata auth,
uint256 quantity,
address affiliate,
bytes calldata signature
) external payable {
mintTo(auth, quantity, msg.sender, affiliate, signature);
}
function mintTo(
Auth calldata auth,
uint256 quantity,
address to,
address affiliate,
bytes calldata signature
) public payable {
Invite memory i = invites[auth.key];
if (to == address(0)) {
to = msg.sender;
}
if (affiliate != address(0)) {
if (affiliate == PLATFORM || affiliate == owner() || affiliate == msg.sender) {
revert InvalidReferral();
}
validateAffiliate(affiliate, signature, config.affiliateSigner);
}
if (i.limit == 0) {
revert MintingPaused();
}
if (!verify(auth, msg.sender)) {
revert WalletUnauthorizedToMint();
}
if (block.timestamp < i.start) {
revert MintNotYetStarted();
}
if (i.limit < config.maxSupply) {
uint256 totalAfterMint = minted[msg.sender][auth.key] + quantity;
if (totalAfterMint > i.limit) {
revert NumberOfMintsExceeded();
}
}
if (quantity > config.maxBatchSize) {
revert MaxBatchSizeExceeded();
}
if ((_totalMinted() + quantity) > config.maxSupply) {
revert MaxSupplyExceeded();
}
uint256 cost = computePrice(i.price, quantity, affiliate != address(0));
if (msg.value < cost) {
revert InsufficientEthSent();
}
if (msg.value > cost) {
revert ExcessiveEthSent();
}
_mint(to, quantity);
if (i.limit < config.maxSupply) {
minted[msg.sender][auth.key] += quantity;
}
uint128 value = uint128(msg.value);
uint128 affiliateWad = 0;
if (affiliate != address(0)) {
affiliateWad = (value * config.affiliateFee) / 10000;
affiliateBalance[affiliate] += affiliateWad;
emit Referral(affiliate, affiliateWad, quantity);
}
uint128 superAffiliateWad = 0;
if (config.superAffiliatePayout != address(0)) {
superAffiliateWad = ((value * config.platformFee) / 2) / 10000;
affiliateBalance[config.superAffiliatePayout] += superAffiliateWad;
}
OwnerBalance memory balance = ownerBalance;
uint128 platformWad = ((value * config.platformFee) / 10000) - superAffiliateWad;
uint128 ownerWad = value - affiliateWad - platformWad - superAffiliateWad;
ownerBalance = OwnerBalance({
owner: balance.owner + ownerWad,
platform: balance.platform + platformWad
});
}
function burnToMint(uint256[] calldata tokenIds) external {
if (!burnConfig.enabled) {
revert BurnToMintDisabled();
}
if (block.timestamp < burnConfig.start) {
revert MintNotYetStarted();
}
// check if msg.sender owns tokens and has correct approvals
for (uint256 i = 0; i < tokenIds.length; i++) {
if (burnConfig.archetype.ownerOf(tokenIds[i]) != msg.sender) {
revert NotTokenOwner();
}
}
if (!burnConfig.archetype.isApprovedForAll(msg.sender, address(this))) {
revert NotApprovedToTransfer();
}
if (tokenIds.length % burnConfig.ratio != 0) {
revert InvalidAmountOfTokens();
}
uint256 quantity = tokenIds.length / burnConfig.ratio;
if (quantity > config.maxBatchSize) {
revert MaxBatchSizeExceeded();
}
if (burnConfig.limit < config.maxSupply) {
uint256 totalAfterMint = minted[msg.sender][bytes32("burn")] + quantity;
if (totalAfterMint > burnConfig.limit) {
revert NumberOfMintsExceeded();
}
}
if ((_totalMinted() + quantity) > config.maxSupply) {
revert MaxSupplyExceeded();
}
for (uint256 i = 0; i < tokenIds.length; i++) {
burnConfig.archetype.transferFrom(
msg.sender,
address(0x000000000000000000000000000000000000dEaD),
tokenIds[i]
);
}
_mint(msg.sender, quantity);
if (burnConfig.limit < config.maxSupply) {
minted[msg.sender][bytes32("burn")] += quantity;
}
}
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
if (revealed == false) {
return string(abi.encodePacked(config.unrevealedUri, LibString.toString(tokenId)));
}
return
bytes(config.baseUri).length != 0
? string(abi.encodePacked(config.baseUri, LibString.toString(tokenId)))
: "";
}
function withdraw() external {
uint128 wad = 0;
if (msg.sender == owner() || msg.sender == config.ownerAltPayout || msg.sender == PLATFORM) {
OwnerBalance memory balance = ownerBalance;
if (msg.sender == owner() || msg.sender == config.ownerAltPayout) {
wad = balance.owner;
ownerBalance = OwnerBalance({ owner: 0, platform: balance.platform });
} else {
wad = balance.platform;
ownerBalance = OwnerBalance({ owner: balance.owner, platform: 0 });
}
} else {
wad = affiliateBalance[msg.sender];
affiliateBalance[msg.sender] = 0;
}
if (wad == 0) {
revert BalanceEmpty();
}
bool success = false;
// send to ownerAltPayout if set and owner is withdrawing
if (msg.sender == owner() && config.ownerAltPayout != address(0)) {
(success, ) = payable(config.ownerAltPayout).call{ value: wad }("");
} else {
(success, ) = msg.sender.call{ value: wad }("");
}
if (!success) {
revert TransferFailed();
}
emit Withdrawal(msg.sender, wad);
}
function setTokenMsg(uint256 tokenId, string calldata message) external {
if (msg.sender != ownerOf(tokenId)) {
revert NotTokenOwner();
}
tokenMsg[tokenId] = bytes(message);
}
function getTokenMsg(uint256 tokenId) external view returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
return string(tokenMsg[tokenId]);
}
// calculate price based on affiliate usage and mint discounts
function computePrice(
uint128 price,
uint256 numTokens,
bool affiliateUsed
) public view returns (uint256) {
uint256 cost = price * numTokens;
if (affiliateUsed) {
cost = cost - ((cost * config.discounts.affiliateDiscount) / 10000);
}
for (uint256 i = 0; i < config.discounts.mintTiers.length; i++) {
if (numTokens >= config.discounts.mintTiers[i].numMints) {
return cost = cost - ((cost * config.discounts.mintTiers[i].mintDiscount) / 10000);
}
}
return cost;
}
//
// OWNER ONLY
//
function reveal() external onlyOwner {
revealed = !revealed;
}
function setUnrevealedURI(string memory unrevealedURI) external onlyOwner {
config.unrevealedUri = unrevealedURI;
}
function setBaseURI(string memory baseUri) external onlyOwner {
if (!uriUnlocked) {
revert LockedForever();
}
config.baseUri = baseUri;
}
/// @notice the password is "forever"
function lockURI(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
uriUnlocked = false;
}
/// @notice the password is "forever"
// max supply cannot subceed total supply. Be careful changing.
function setMaxSupply(uint32 maxSupply, string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
if (!maxSupplyUnlocked) {
revert LockedForever();
}
if (maxSupply < _totalMinted()) {
revert MaxSupplyExceeded();
}
config.maxSupply = maxSupply;
}
/// @notice the password is "forever"
function lockMaxSupply(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
maxSupplyUnlocked = false;
}
function setAffiliateFee(uint16 affiliateFee) external onlyOwner {
if (!affiliateFeeUnlocked) {
revert LockedForever();
}
if (affiliateFee > MAXBPS) {
revert InvalidConfig();
}
config.affiliateFee = affiliateFee;
}
/// @notice the password is "forever"
function lockAffiliateFee(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
affiliateFeeUnlocked = false;
}
function setDiscounts(Discount calldata discounts) external onlyOwner {
if (!discountsUnlocked) {
revert LockedForever();
}
if (discounts.affiliateDiscount > MAXBPS) {
revert InvalidConfig();
}
// ensure mint tiers are correctly ordered from highest to lowest.
for (uint256 i = 1; i < discounts.mintTiers.length; i++) {
if (
discounts.mintTiers[i].mintDiscount > MAXBPS ||
discounts.mintTiers[i].numMints > discounts.mintTiers[i - 1].numMints
) {
revert InvalidConfig();
}
}
config.discounts = discounts;
}
/// @notice the password is "forever"
function lockDiscounts(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
discountsUnlocked = false;
}
/// @notice Set BAYC-style provenance once it's calculated
function setProvenanceHash(string memory provenanceHash) external onlyOwner {
if (!provenanceHashUnlocked) {
revert LockedForever();
}
provenance = provenanceHash;
}
/// @notice the password is "forever"
function lockProvenanceHash(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
provenanceHashUnlocked = false;
}
function setOwnerAltPayout(address ownerAltPayout) external onlyOwner {
if (!ownerAltPayoutUnlocked) {
revert LockedForever();
}
config.ownerAltPayout = ownerAltPayout;
}
/// @notice the password is "forever"
function lockOwnerAltPayout(string memory password) external onlyOwner {
if (keccak256(abi.encodePacked(password)) != keccak256(abi.encodePacked("forever"))) {
revert WrongPassword();
}
ownerAltPayoutUnlocked = false;
}
function setInvites(Invitelist[] calldata invitelist) external onlyOwner {
for (uint256 i = 0; i < invitelist.length; i++) {
Invitelist calldata list = invitelist[i];
invites[list.key] = list.invite;
emit Invited(list.key, list.cid);
}
}
function setInvite(
bytes32 _key,
bytes32 _cid,
Invite calldata _invite
) external onlyOwner {
invites[_key] = _invite;
emit Invited(_key, _cid);
}
function enableBurnToMint(
address archetype,
uint16 ratio,
uint64 start,
uint64 limit
) external onlyOwner {
burnConfig = BurnConfig({
archetype: Archetype(archetype),
enabled: true,
ratio: ratio,
start: start,
limit: limit
});
}
function disableBurnToMint() external onlyOwner {
burnConfig = BurnConfig({
enabled: false,
ratio: 0,
archetype: Archetype(address(0)),
start: 0,
limit: 0
});
}
//
// PLATFORM ONLY
//
function setSuperAffiliatePayout(address superAffiliatePayout) external onlyPlatform {
config.superAffiliatePayout = superAffiliatePayout;
}
//
// INTERNAL
//
function _startTokenId() internal view virtual override returns (uint256) {
return 1;
}
function validateAffiliate(
address affiliate,
bytes calldata signature,
address affiliateSigner
) internal view {
bytes32 signedMessagehash = ECDSA.toEthSignedMessageHash(
keccak256(abi.encodePacked(affiliate))
);
address signer = ECDSA.recover(signedMessagehash, signature);
if (signer != affiliateSigner) {
revert InvalidSignature();
}
}
function verify(Auth calldata auth, address account) internal pure returns (bool) {
if (auth.key == "") return true;
return MerkleProofLib.verify(auth.proof, auth.key, keccak256(abi.encodePacked(account)));
}
modifier onlyPlatform() {
require(PLATFORM == _msgSenderERC721A(), "caller is not the platform");
_;
}
}// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.2
// Creator: Chiru Labs
pragma solidity ^0.8.4;
import "./IERC721AUpgradeable.sol";
import {ERC721AStorage} from "./ERC721AStorage.sol";
import "./ERC721A__Initializable.sol";
/**
* @dev Interface of ERC721 token receiver.
*/
interface ERC721A__IERC721ReceiverUpgradeable {
function onERC721Received(
address operator,
address from,
uint256 tokenId,
bytes calldata data
) external returns (bytes4);
}
/**
* @title ERC721A
*
* @dev Implementation of the [ERC721](https://eips.ethereum.org/EIPS/eip-721)
* Non-Fungible Token Standard, including the Metadata extension.
* Optimized for lower gas during batch mints.
*
* Token IDs are minted in sequential order (e.g. 0, 1, 2, 3, ...)
* starting from `_startTokenId()`.
*
* Assumptions:
*
* - An owner cannot have more than 2**64 - 1 (max value of uint64) of supply.
* - The maximum token ID cannot exceed 2**256 - 1 (max value of uint256).
*/
contract ERC721AUpgradeable is ERC721A__Initializable, IERC721AUpgradeable {
using ERC721AStorage for ERC721AStorage.Layout;
// =============================================================
// CONSTANTS
// =============================================================
// Mask of an entry in packed address data.
uint256 private constant _BITMASK_ADDRESS_DATA_ENTRY = (1 << 64) - 1;
// The bit position of `numberMinted` in packed address data.
uint256 private constant _BITPOS_NUMBER_MINTED = 64;
// The bit position of `numberBurned` in packed address data.
uint256 private constant _BITPOS_NUMBER_BURNED = 128;
// The bit position of `aux` in packed address data.
uint256 private constant _BITPOS_AUX = 192;
// Mask of all 256 bits in packed address data except the 64 bits for `aux`.
uint256 private constant _BITMASK_AUX_COMPLEMENT = (1 << 192) - 1;
// The bit position of `startTimestamp` in packed ownership.
uint256 private constant _BITPOS_START_TIMESTAMP = 160;
// The bit mask of the `burned` bit in packed ownership.
uint256 private constant _BITMASK_BURNED = 1 << 224;
// The bit position of the `nextInitialized` bit in packed ownership.
uint256 private constant _BITPOS_NEXT_INITIALIZED = 225;
// The bit mask of the `nextInitialized` bit in packed ownership.
uint256 private constant _BITMASK_NEXT_INITIALIZED = 1 << 225;
// The bit position of `extraData` in packed ownership.
uint256 private constant _BITPOS_EXTRA_DATA = 232;
// Mask of all 256 bits in a packed ownership except the 24 bits for `extraData`.
uint256 private constant _BITMASK_EXTRA_DATA_COMPLEMENT = (1 << 232) - 1;
// The mask of the lower 160 bits for addresses.
uint256 private constant _BITMASK_ADDRESS = (1 << 160) - 1;
// The maximum `quantity` that can be minted with {_mintERC2309}.
// This limit is to prevent overflows on the address data entries.
// For a limit of 5000, a total of 3.689e15 calls to {_mintERC2309}
// is required to cause an overflow, which is unrealistic.
uint256 private constant _MAX_MINT_ERC2309_QUANTITY_LIMIT = 5000;
// The `Transfer` event signature is given by:
// `keccak256(bytes("Transfer(address,address,uint256)"))`.
bytes32 private constant _TRANSFER_EVENT_SIGNATURE =
0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;
// =============================================================
// CONSTRUCTOR
// =============================================================
function __ERC721A_init(string memory name_, string memory symbol_) internal onlyInitializingERC721A {
__ERC721A_init_unchained(name_, symbol_);
}
function __ERC721A_init_unchained(string memory name_, string memory symbol_) internal onlyInitializingERC721A {
ERC721AStorage.layout()._name = name_;
ERC721AStorage.layout()._symbol = symbol_;
ERC721AStorage.layout()._currentIndex = _startTokenId();
}
// =============================================================
// TOKEN COUNTING OPERATIONS
// =============================================================
/**
* @dev Returns the starting token ID.
* To change the starting token ID, please override this function.
*/
function _startTokenId() internal view virtual returns (uint256) {
return 0;
}
/**
* @dev Returns the next token ID to be minted.
*/
function _nextTokenId() internal view virtual returns (uint256) {
return ERC721AStorage.layout()._currentIndex;
}
/**
* @dev Returns the total number of tokens in existence.
* Burned tokens will reduce the count.
* To get the total number of tokens minted, please see {_totalMinted}.
*/
function totalSupply() public view virtual override returns (uint256) {
// Counter underflow is impossible as _burnCounter cannot be incremented
// more than `_currentIndex - _startTokenId()` times.
unchecked {
return ERC721AStorage.layout()._currentIndex - ERC721AStorage.layout()._burnCounter - _startTokenId();
}
}
/**
* @dev Returns the total amount of tokens minted in the contract.
*/
function _totalMinted() internal view virtual returns (uint256) {
// Counter underflow is impossible as `_currentIndex` does not decrement,
// and it is initialized to `_startTokenId()`.
unchecked {
return ERC721AStorage.layout()._currentIndex - _startTokenId();
}
}
/**
* @dev Returns the total number of tokens burned.
*/
function _totalBurned() internal view virtual returns (uint256) {
return ERC721AStorage.layout()._burnCounter;
}
// =============================================================
// ADDRESS DATA OPERATIONS
// =============================================================
/**
* @dev Returns the number of tokens in `owner`'s account.
*/
function balanceOf(address owner) public view virtual override returns (uint256) {
if (owner == address(0)) revert BalanceQueryForZeroAddress();
return ERC721AStorage.layout()._packedAddressData[owner] & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens minted by `owner`.
*/
function _numberMinted(address owner) internal view returns (uint256) {
return
(ERC721AStorage.layout()._packedAddressData[owner] >> _BITPOS_NUMBER_MINTED) & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the number of tokens burned by or on behalf of `owner`.
*/
function _numberBurned(address owner) internal view returns (uint256) {
return
(ERC721AStorage.layout()._packedAddressData[owner] >> _BITPOS_NUMBER_BURNED) & _BITMASK_ADDRESS_DATA_ENTRY;
}
/**
* Returns the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
*/
function _getAux(address owner) internal view returns (uint64) {
return uint64(ERC721AStorage.layout()._packedAddressData[owner] >> _BITPOS_AUX);
}
/**
* Sets the auxiliary data for `owner`. (e.g. number of whitelist mint slots used).
* If there are multiple variables, please pack them into a uint64.
*/
function _setAux(address owner, uint64 aux) internal virtual {
uint256 packed = ERC721AStorage.layout()._packedAddressData[owner];
uint256 auxCasted;
// Cast `aux` with assembly to avoid redundant masking.
assembly {
auxCasted := aux
}
packed = (packed & _BITMASK_AUX_COMPLEMENT) | (auxCasted << _BITPOS_AUX);
ERC721AStorage.layout()._packedAddressData[owner] = packed;
}
// =============================================================
// IERC165
// =============================================================
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
* to learn more about how these ids are created.
*
* This function call must use less than 30000 gas.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
// The interface IDs are constants representing the first 4 bytes
// of the XOR of all function selectors in the interface.
// See: [ERC165](https://eips.ethereum.org/EIPS/eip-165)
// (e.g. `bytes4(i.functionA.selector ^ i.functionB.selector ^ ...)`)
return
interfaceId == 0x01ffc9a7 || // ERC165 interface ID for ERC165.
interfaceId == 0x80ac58cd || // ERC165 interface ID for ERC721.
interfaceId == 0x5b5e139f; // ERC165 interface ID for ERC721Metadata.
}
// =============================================================
// IERC721Metadata
// =============================================================
/**
* @dev Returns the token collection name.
*/
function name() public view virtual override returns (string memory) {
return ERC721AStorage.layout()._name;
}
/**
* @dev Returns the token collection symbol.
*/
function symbol() public view virtual override returns (string memory) {
return ERC721AStorage.layout()._symbol;
}
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
if (!_exists(tokenId)) revert URIQueryForNonexistentToken();
string memory baseURI = _baseURI();
return bytes(baseURI).length != 0 ? string(abi.encodePacked(baseURI, _toString(tokenId))) : '';
}
/**
* @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
* token will be the concatenation of the `baseURI` and the `tokenId`. Empty
* by default, it can be overridden in child contracts.
*/
function _baseURI() internal view virtual returns (string memory) {
return '';
}
// =============================================================
// OWNERSHIPS OPERATIONS
// =============================================================
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) public view virtual override returns (address) {
return address(uint160(_packedOwnershipOf(tokenId)));
}
/**
* @dev Gas spent here starts off proportional to the maximum mint batch size.
* It gradually moves to O(1) as tokens get transferred around over time.
*/
function _ownershipOf(uint256 tokenId) internal view virtual returns (TokenOwnership memory) {
return _unpackedOwnership(_packedOwnershipOf(tokenId));
}
/**
* @dev Returns the unpacked `TokenOwnership` struct at `index`.
*/
function _ownershipAt(uint256 index) internal view virtual returns (TokenOwnership memory) {
return _unpackedOwnership(ERC721AStorage.layout()._packedOwnerships[index]);
}
/**
* @dev Initializes the ownership slot minted at `index` for efficiency purposes.
*/
function _initializeOwnershipAt(uint256 index) internal virtual {
if (ERC721AStorage.layout()._packedOwnerships[index] == 0) {
ERC721AStorage.layout()._packedOwnerships[index] = _packedOwnershipOf(index);
}
}
/**
* Returns the packed ownership data of `tokenId`.
*/
function _packedOwnershipOf(uint256 tokenId) private view returns (uint256) {
uint256 curr = tokenId;
unchecked {
if (_startTokenId() <= curr)
if (curr < ERC721AStorage.layout()._currentIndex) {
uint256 packed = ERC721AStorage.layout()._packedOwnerships[curr];
// If not burned.
if (packed & _BITMASK_BURNED == 0) {
// Invariant:
// There will always be an initialized ownership slot
// (i.e. `ownership.addr != address(0) && ownership.burned == false`)
// before an unintialized ownership slot
// (i.e. `ownership.addr == address(0) && ownership.burned == false`)
// Hence, `curr` will not underflow.
//
// We can directly compare the packed value.
// If the address is zero, packed will be zero.
while (packed == 0) {
packed = ERC721AStorage.layout()._packedOwnerships[--curr];
}
return packed;
}
}
}
revert OwnerQueryForNonexistentToken();
}
/**
* @dev Returns the unpacked `TokenOwnership` struct from `packed`.
*/
function _unpackedOwnership(uint256 packed) private pure returns (TokenOwnership memory ownership) {
ownership.addr = address(uint160(packed));
ownership.startTimestamp = uint64(packed >> _BITPOS_START_TIMESTAMP);
ownership.burned = packed & _BITMASK_BURNED != 0;
ownership.extraData = uint24(packed >> _BITPOS_EXTRA_DATA);
}
/**
* @dev Packs ownership data into a single uint256.
*/
function _packOwnershipData(address owner, uint256 flags) private view returns (uint256 result) {
assembly {
// Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
owner := and(owner, _BITMASK_ADDRESS)
// `owner | (block.timestamp << _BITPOS_START_TIMESTAMP) | flags`.
result := or(owner, or(shl(_BITPOS_START_TIMESTAMP, timestamp()), flags))
}
}
/**
* @dev Returns the `nextInitialized` flag set if `quantity` equals 1.
*/
function _nextInitializedFlag(uint256 quantity) private pure returns (uint256 result) {
// For branchless setting of the `nextInitialized` flag.
assembly {
// `(quantity == 1) << _BITPOS_NEXT_INITIALIZED`.
result := shl(_BITPOS_NEXT_INITIALIZED, eq(quantity, 1))
}
}
// =============================================================
// APPROVAL OPERATIONS
// =============================================================
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the
* zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) public virtual override {
address owner = ownerOf(tokenId);
if (_msgSenderERC721A() != owner)
if (!isApprovedForAll(owner, _msgSenderERC721A())) {
revert ApprovalCallerNotOwnerNorApproved();
}
ERC721AStorage.layout()._tokenApprovals[tokenId].value = to;
emit Approval(owner, to, tokenId);
}
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) public view virtual override returns (address) {
if (!_exists(tokenId)) revert ApprovalQueryForNonexistentToken();
return ERC721AStorage.layout()._tokenApprovals[tokenId].value;
}
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom}
* for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool approved) public virtual override {
if (operator == _msgSenderERC721A()) revert ApproveToCaller();
ERC721AStorage.layout()._operatorApprovals[_msgSenderERC721A()][operator] = approved;
emit ApprovalForAll(_msgSenderERC721A(), operator, approved);
}
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
return ERC721AStorage.layout()._operatorApprovals[owner][operator];
}
/**
* @dev Returns whether `tokenId` exists.
*
* Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
*
* Tokens start existing when they are minted. See {_mint}.
*/
function _exists(uint256 tokenId) internal view virtual returns (bool) {
return
_startTokenId() <= tokenId &&
tokenId < ERC721AStorage.layout()._currentIndex && // If within bounds,
ERC721AStorage.layout()._packedOwnerships[tokenId] & _BITMASK_BURNED == 0; // and not burned.
}
/**
* @dev Returns whether `msgSender` is equal to `approvedAddress` or `owner`.
*/
function _isSenderApprovedOrOwner(
address approvedAddress,
address owner,
address msgSender
) private pure returns (bool result) {
assembly {
// Mask `owner` to the lower 160 bits, in case the upper bits somehow aren't clean.
owner := and(owner, _BITMASK_ADDRESS)
// Mask `msgSender` to the lower 160 bits, in case the upper bits somehow aren't clean.
msgSender := and(msgSender, _BITMASK_ADDRESS)
// `msgSender == owner || msgSender == approvedAddress`.
result := or(eq(msgSender, owner), eq(msgSender, approvedAddress))
}
}
/**
* @dev Returns the storage slot and value for the approved address of `tokenId`.
*/
function _getApprovedSlotAndAddress(uint256 tokenId)
private
view
returns (uint256 approvedAddressSlot, address approvedAddress)
{
ERC721AStorage.TokenApprovalRef storage tokenApproval = ERC721AStorage.layout()._tokenApprovals[tokenId];
// The following is equivalent to `approvedAddress = _tokenApprovals[tokenId].value`.
assembly {
approvedAddressSlot := tokenApproval.slot
approvedAddress := sload(approvedAddressSlot)
}
}
// =============================================================
// TRANSFER OPERATIONS
// =============================================================
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token
* by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);
if (address(uint160(prevOwnershipPacked)) != from) revert TransferFromIncorrectOwner();
(uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);
// The nested ifs save around 20+ gas over a compound boolean condition.
if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
if (to == address(0)) revert TransferToZeroAddress();
_beforeTokenTransfers(from, to, tokenId, 1);
// Clear approvals from the previous owner.
assembly {
if approvedAddress {
// This is equivalent to `delete _tokenApprovals[tokenId]`.
sstore(approvedAddressSlot, 0)
}
}
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
unchecked {
// We can directly increment and decrement the balances.
--ERC721AStorage.layout()._packedAddressData[from]; // Updates: `balance -= 1`.
++ERC721AStorage.layout()._packedAddressData[to]; // Updates: `balance += 1`.
// Updates:
// - `address` to the next owner.
// - `startTimestamp` to the timestamp of transfering.
// - `burned` to `false`.
// - `nextInitialized` to `true`.
ERC721AStorage.layout()._packedOwnerships[tokenId] = _packOwnershipData(
to,
_BITMASK_NEXT_INITIALIZED | _nextExtraData(from, to, prevOwnershipPacked)
);
// If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
uint256 nextTokenId = tokenId + 1;
// If the next slot's address is zero and not burned (i.e. packed value is zero).
if (ERC721AStorage.layout()._packedOwnerships[nextTokenId] == 0) {
// If the next slot is within bounds.
if (nextTokenId != ERC721AStorage.layout()._currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
ERC721AStorage.layout()._packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
emit Transfer(from, to, tokenId);
_afterTokenTransfers(from, to, tokenId, 1);
}
/**
* @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) public virtual override {
safeTransferFrom(from, to, tokenId, '');
}
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token
* by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement
* {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes memory _data
) public virtual override {
transferFrom(from, to, tokenId);
if (to.code.length != 0)
if (!_checkContractOnERC721Received(from, to, tokenId, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
}
/**
* @dev Hook that is called before a set of serially-ordered token IDs
* are about to be transferred. This includes minting.
* And also called before burning one token.
*
* `startTokenId` - the first token ID to be transferred.
* `quantity` - the amount to be transferred.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _beforeTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Hook that is called after a set of serially-ordered token IDs
* have been transferred. This includes minting.
* And also called after one token has been burned.
*
* `startTokenId` - the first token ID to be transferred.
* `quantity` - the amount to be transferred.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` has been
* transferred to `to`.
* - When `from` is zero, `tokenId` has been minted for `to`.
* - When `to` is zero, `tokenId` has been burned by `from`.
* - `from` and `to` are never both zero.
*/
function _afterTokenTransfers(
address from,
address to,
uint256 startTokenId,
uint256 quantity
) internal virtual {}
/**
* @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target contract.
*
* `from` - Previous owner of the given token ID.
* `to` - Target address that will receive the token.
* `tokenId` - Token ID to be transferred.
* `_data` - Optional data to send along with the call.
*
* Returns whether the call correctly returned the expected magic value.
*/
function _checkContractOnERC721Received(
address from,
address to,
uint256 tokenId,
bytes memory _data
) private returns (bool) {
try
ERC721A__IERC721ReceiverUpgradeable(to).onERC721Received(_msgSenderERC721A(), from, tokenId, _data)
returns (bytes4 retval) {
return retval == ERC721A__IERC721ReceiverUpgradeable(to).onERC721Received.selector;
} catch (bytes memory reason) {
if (reason.length == 0) {
revert TransferToNonERC721ReceiverImplementer();
} else {
assembly {
revert(add(32, reason), mload(reason))
}
}
}
}
// =============================================================
// MINT OPERATIONS
// =============================================================
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {Transfer} event for each mint.
*/
function _mint(address to, uint256 quantity) internal virtual {
uint256 startTokenId = ERC721AStorage.layout()._currentIndex;
if (quantity == 0) revert MintZeroQuantity();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are incredibly unrealistic.
// `balance` and `numberMinted` have a maximum limit of 2**64.
// `tokenId` has a maximum limit of 2**256.
unchecked {
// Updates:
// - `balance += quantity`.
// - `numberMinted += quantity`.
//
// We can directly add to the `balance` and `numberMinted`.
ERC721AStorage.layout()._packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);
// Updates:
// - `address` to the owner.
// - `startTimestamp` to the timestamp of minting.
// - `burned` to `false`.
// - `nextInitialized` to `quantity == 1`.
ERC721AStorage.layout()._packedOwnerships[startTokenId] = _packOwnershipData(
to,
_nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
);
uint256 toMasked;
uint256 end = startTokenId + quantity;
// Use assembly to loop and emit the `Transfer` event for gas savings.
// The duplicated `log4` removes an extra check and reduces stack juggling.
// The assembly, together with the surrounding Solidity code, have been
// delicately arranged to nudge the compiler into producing optimized opcodes.
assembly {
// Mask `to` to the lower 160 bits, in case the upper bits somehow aren't clean.
toMasked := and(to, _BITMASK_ADDRESS)
// Emit the `Transfer` event.
log4(
0, // Start of data (0, since no data).
0, // End of data (0, since no data).
_TRANSFER_EVENT_SIGNATURE, // Signature.
0, // `address(0)`.
toMasked, // `to`.
startTokenId // `tokenId`.
)
for {
let tokenId := add(startTokenId, 1)
} iszero(eq(tokenId, end)) {
tokenId := add(tokenId, 1)
} {
// Emit the `Transfer` event. Similar to above.
log4(0, 0, _TRANSFER_EVENT_SIGNATURE, 0, toMasked, tokenId)
}
}
if (toMasked == 0) revert MintToZeroAddress();
ERC721AStorage.layout()._currentIndex = end;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Mints `quantity` tokens and transfers them to `to`.
*
* This function is intended for efficient minting only during contract creation.
*
* It emits only one {ConsecutiveTransfer} as defined in
* [ERC2309](https://eips.ethereum.org/EIPS/eip-2309),
* instead of a sequence of {Transfer} event(s).
*
* Calling this function outside of contract creation WILL make your contract
* non-compliant with the ERC721 standard.
* For full ERC721 compliance, substituting ERC721 {Transfer} event(s) with the ERC2309
* {ConsecutiveTransfer} event is only permissible during contract creation.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - `quantity` must be greater than 0.
*
* Emits a {ConsecutiveTransfer} event.
*/
function _mintERC2309(address to, uint256 quantity) internal virtual {
uint256 startTokenId = ERC721AStorage.layout()._currentIndex;
if (to == address(0)) revert MintToZeroAddress();
if (quantity == 0) revert MintZeroQuantity();
if (quantity > _MAX_MINT_ERC2309_QUANTITY_LIMIT) revert MintERC2309QuantityExceedsLimit();
_beforeTokenTransfers(address(0), to, startTokenId, quantity);
// Overflows are unrealistic due to the above check for `quantity` to be below the limit.
unchecked {
// Updates:
// - `balance += quantity`.
// - `numberMinted += quantity`.
//
// We can directly add to the `balance` and `numberMinted`.
ERC721AStorage.layout()._packedAddressData[to] += quantity * ((1 << _BITPOS_NUMBER_MINTED) | 1);
// Updates:
// - `address` to the owner.
// - `startTimestamp` to the timestamp of minting.
// - `burned` to `false`.
// - `nextInitialized` to `quantity == 1`.
ERC721AStorage.layout()._packedOwnerships[startTokenId] = _packOwnershipData(
to,
_nextInitializedFlag(quantity) | _nextExtraData(address(0), to, 0)
);
emit ConsecutiveTransfer(startTokenId, startTokenId + quantity - 1, address(0), to);
ERC721AStorage.layout()._currentIndex = startTokenId + quantity;
}
_afterTokenTransfers(address(0), to, startTokenId, quantity);
}
/**
* @dev Safely mints `quantity` tokens and transfers them to `to`.
*
* Requirements:
*
* - If `to` refers to a smart contract, it must implement
* {IERC721Receiver-onERC721Received}, which is called for each safe transfer.
* - `quantity` must be greater than 0.
*
* See {_mint}.
*
* Emits a {Transfer} event for each mint.
*/
function _safeMint(
address to,
uint256 quantity,
bytes memory _data
) internal virtual {
_mint(to, quantity);
unchecked {
if (to.code.length != 0) {
uint256 end = ERC721AStorage.layout()._currentIndex;
uint256 index = end - quantity;
do {
if (!_checkContractOnERC721Received(address(0), to, index++, _data)) {
revert TransferToNonERC721ReceiverImplementer();
}
} while (index < end);
// Reentrancy protection.
if (ERC721AStorage.layout()._currentIndex != end) revert();
}
}
}
/**
* @dev Equivalent to `_safeMint(to, quantity, '')`.
*/
function _safeMint(address to, uint256 quantity) internal virtual {
_safeMint(to, quantity, '');
}
// =============================================================
// BURN OPERATIONS
// =============================================================
/**
* @dev Equivalent to `_burn(tokenId, false)`.
*/
function _burn(uint256 tokenId) internal virtual {
_burn(tokenId, false);
}
/**
* @dev Destroys `tokenId`.
* The approval is cleared when the token is burned.
*
* Requirements:
*
* - `tokenId` must exist.
*
* Emits a {Transfer} event.
*/
function _burn(uint256 tokenId, bool approvalCheck) internal virtual {
uint256 prevOwnershipPacked = _packedOwnershipOf(tokenId);
address from = address(uint160(prevOwnershipPacked));
(uint256 approvedAddressSlot, address approvedAddress) = _getApprovedSlotAndAddress(tokenId);
if (approvalCheck) {
// The nested ifs save around 20+ gas over a compound boolean condition.
if (!_isSenderApprovedOrOwner(approvedAddress, from, _msgSenderERC721A()))
if (!isApprovedForAll(from, _msgSenderERC721A())) revert TransferCallerNotOwnerNorApproved();
}
_beforeTokenTransfers(from, address(0), tokenId, 1);
// Clear approvals from the previous owner.
assembly {
if approvedAddress {
// This is equivalent to `delete _tokenApprovals[tokenId]`.
sstore(approvedAddressSlot, 0)
}
}
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
// Counter overflow is incredibly unrealistic as `tokenId` would have to be 2**256.
unchecked {
// Updates:
// - `balance -= 1`.
// - `numberBurned += 1`.
//
// We can directly decrement the balance, and increment the number burned.
// This is equivalent to `packed -= 1; packed += 1 << _BITPOS_NUMBER_BURNED;`.
ERC721AStorage.layout()._packedAddressData[from] += (1 << _BITPOS_NUMBER_BURNED) - 1;
// Updates:
// - `address` to the last owner.
// - `startTimestamp` to the timestamp of burning.
// - `burned` to `true`.
// - `nextInitialized` to `true`.
ERC721AStorage.layout()._packedOwnerships[tokenId] = _packOwnershipData(
from,
(_BITMASK_BURNED | _BITMASK_NEXT_INITIALIZED) | _nextExtraData(from, address(0), prevOwnershipPacked)
);
// If the next slot may not have been initialized (i.e. `nextInitialized == false`) .
if (prevOwnershipPacked & _BITMASK_NEXT_INITIALIZED == 0) {
uint256 nextTokenId = tokenId + 1;
// If the next slot's address is zero and not burned (i.e. packed value is zero).
if (ERC721AStorage.layout()._packedOwnerships[nextTokenId] == 0) {
// If the next slot is within bounds.
if (nextTokenId != ERC721AStorage.layout()._currentIndex) {
// Initialize the next slot to maintain correctness for `ownerOf(tokenId + 1)`.
ERC721AStorage.layout()._packedOwnerships[nextTokenId] = prevOwnershipPacked;
}
}
}
}
emit Transfer(from, address(0), tokenId);
_afterTokenTransfers(from, address(0), tokenId, 1);
// Overflow not possible, as _burnCounter cannot be exceed _currentIndex times.
unchecked {
ERC721AStorage.layout()._burnCounter++;
}
}
// =============================================================
// EXTRA DATA OPERATIONS
// =============================================================
/**
* @dev Directly sets the extra data for the ownership data `index`.
*/
function _setExtraDataAt(uint256 index, uint24 extraData) internal virtual {
uint256 packed = ERC721AStorage.layout()._packedOwnerships[index];
if (packed == 0) revert OwnershipNotInitializedForExtraData();
uint256 extraDataCasted;
// Cast `extraData` with assembly to avoid redundant masking.
assembly {
extraDataCasted := extraData
}
packed = (packed & _BITMASK_EXTRA_DATA_COMPLEMENT) | (extraDataCasted << _BITPOS_EXTRA_DATA);
ERC721AStorage.layout()._packedOwnerships[index] = packed;
}
/**
* @dev Called during each token transfer to set the 24bit `extraData` field.
* Intended to be overridden by the cosumer contract.
*
* `previousExtraData` - the value of `extraData` before transfer.
*
* Calling conditions:
*
* - When `from` and `to` are both non-zero, `from`'s `tokenId` will be
* transferred to `to`.
* - When `from` is zero, `tokenId` will be minted for `to`.
* - When `to` is zero, `tokenId` will be burned by `from`.
* - `from` and `to` are never both zero.
*/
function _extraData(
address from,
address to,
uint24 previousExtraData
) internal view virtual returns (uint24) {}
/**
* @dev Returns the next extra data for the packed ownership data.
* The returned result is shifted into position.
*/
function _nextExtraData(
address from,
address to,
uint256 prevOwnershipPacked
) private view returns (uint256) {
uint24 extraData = uint24(prevOwnershipPacked >> _BITPOS_EXTRA_DATA);
return uint256(_extraData(from, to, extraData)) << _BITPOS_EXTRA_DATA;
}
// =============================================================
// OTHER OPERATIONS
// =============================================================
/**
* @dev Returns the message sender (defaults to `msg.sender`).
*
* If you are writing GSN compatible contracts, you need to override this function.
*/
function _msgSenderERC721A() internal view virtual returns (address) {
return msg.sender;
}
/**
* @dev Converts a uint256 to its ASCII string decimal representation.
*/
function _toString(uint256 value) internal pure virtual returns (string memory str) {
assembly {
// The maximum value of a uint256 contains 78 digits (1 byte per digit),
// but we allocate 0x80 bytes to keep the free memory pointer 32-byte word aligned.
// We will need 1 32-byte word to store the length,
// and 3 32-byte words to store a maximum of 78 digits. Total: 0x20 + 3 * 0x20 = 0x80.
str := add(mload(0x40), 0x80)
// Update the free memory pointer to allocate.
mstore(0x40, str)
// Cache the end of the memory to calculate the length later.
let end := str
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
// prettier-ignore
for { let temp := value } 1 {} {
str := sub(str, 1)
// Write the character to the pointer.
// The ASCII index of the '0' character is 48.
mstore8(str, add(48, mod(temp, 10)))
// Keep dividing `temp` until zero.
temp := div(temp, 10)
// prettier-ignore
if iszero(temp) { break }
}
let length := sub(end, str)
// Move the pointer 32 bytes leftwards to make room for the length.
str := sub(str, 0x20)
// Store the length.
mstore(str, length)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/**
* @dev This is a base contract to aid in writing upgradeable diamond facet contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*/
import {ERC721A__InitializableStorage} from "./ERC721A__InitializableStorage.sol";
abstract contract ERC721A__Initializable {
using ERC721A__InitializableStorage for ERC721A__InitializableStorage.Layout;
/**
* @dev Modifier to protect an initializer function from being invoked twice.
*/
modifier initializerERC721A() {
// If the contract is initializing we ignore whether _initialized is set in order to support multiple
// inheritance patterns, but we only do this in the context of a constructor, because in other contexts the
// contract may have been reentered.
require(
ERC721A__InitializableStorage.layout()._initializing
? _isConstructor()
: !ERC721A__InitializableStorage.layout()._initialized,
'ERC721A__Initializable: contract is already initialized'
);
bool isTopLevelCall = !ERC721A__InitializableStorage.layout()._initializing;
if (isTopLevelCall) {
ERC721A__InitializableStorage.layout()._initializing = true;
ERC721A__InitializableStorage.layout()._initialized = true;
}
_;
if (isTopLevelCall) {
ERC721A__InitializableStorage.layout()._initializing = false;
}
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} modifier, directly or indirectly.
*/
modifier onlyInitializingERC721A() {
require(
ERC721A__InitializableStorage.layout()._initializing,
'ERC721A__Initializable: contract is not initializing'
);
_;
}
/// @dev Returns true if and only if the function is running in the constructor
function _isConstructor() private view returns (bool) {
// extcodesize checks the size of the code stored in an address, and
// address returns the current address. Since the code is still not
// deployed when running a constructor, any checks on its code size will
// yield zero, making it an effective way to detect if a contract is
// under construction or not.
address self = address(this);
uint256 cs;
assembly {
cs := extcodesize(self)
}
return cs == 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)
import 'erc721a-upgradeable/contracts/ERC721A__Initializable.sol';
import 'erc721a-upgradeable/contracts/ERC721AUpgradeable.sol';
pragma solidity ^0.8.4;
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract ERC721A__OwnableUpgradeable is ERC721A__Initializable, ERC721AUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializingERC721A {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializingERC721A {
_transferOwnership(_msgSenderERC721A());
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSenderERC721A(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Gas optimized verification of proof of inclusion for a leaf in a Merkle tree.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/MerkleProofLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/MerkleProofLib.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/MerkleProof.sol)
library MerkleProofLib {
function verify(
bytes32[] calldata proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool isValid) {
assembly {
if proof.length {
// Left shift by 5 is equivalent to multiplying by 0x20.
let end := add(proof.offset, shl(5, proof.length))
// Initialize `offset` to the offset of `proof` in the calldata.
let offset := proof.offset
// Iterate over proof elements to compute root hash.
// prettier-ignore
for {} 1 {} {
// Slot of `leaf` in scratch space.
// If the condition is true: 0x20, otherwise: 0x00.
let scratch := shl(5, gt(leaf, calldataload(offset)))
// Store elements to hash contiguously in scratch space.
// Scratch space is 64 bytes (0x00 - 0x3f) and both elements are 32 bytes.
mstore(scratch, leaf)
mstore(xor(scratch, 0x20), calldataload(offset))
// Reuse `leaf` to store the hash to reduce stack operations.
leaf := keccak256(0x00, 0x40)
offset := add(offset, 0x20)
// prettier-ignore
if iszero(lt(offset, end)) { break }
}
}
isValid := eq(leaf, root)
}
}
function verifyMultiProof(
bytes32[] calldata proof,
bytes32 root,
bytes32[] calldata leafs,
bool[] calldata flags
) internal pure returns (bool isValid) {
// Rebuilds the root by consuming and producing values on a queue.
// The queue starts with the `leafs` array, and goes into a `hashes` array.
// After the process, the last element on the queue is verified
// to be equal to the `root`.
//
// The `flags` array denotes whether the sibling
// should be popped from the queue (`flag == true`), or
// should be popped from the `proof` (`flag == false`).
assembly {
// If the number of flags is correct.
// prettier-ignore
for {} eq(add(leafs.length, proof.length), add(flags.length, 1)) {} {
// Left shift by 5 is equivalent to multiplying by 0x20.
// Compute the end calldata offset of `leafs`.
let leafsEnd := add(leafs.offset, shl(5, leafs.length))
// These are the calldata offsets.
let leafsOffset := leafs.offset
let flagsOffset := flags.offset
let proofOffset := proof.offset
// We can use the free memory space for the queue.
// We don't need to allocate, since the queue is temporary.
let hashesFront := mload(0x40)
let hashesBack := hashesFront
// This is the end of the memory for the queue.
let end := add(hashesBack, shl(5, flags.length))
// For the case where `proof.length + leafs.length == 1`.
if iszero(flags.length) {
// If `proof.length` is zero, `leafs.length` is 1.
if iszero(proof.length) {
isValid := eq(calldataload(leafsOffset), root)
break
}
// If `leafs.length` is zero, `proof.length` is 1.
if iszero(leafs.length) {
isValid := eq(calldataload(proofOffset), root)
break
}
}
// prettier-ignore
for {} 1 {} {
let a := 0
// Pops a value from the queue into `a`.
switch lt(leafsOffset, leafsEnd)
case 0 {
// Pop from `hashes` if there are no more leafs.
a := mload(hashesFront)
hashesFront := add(hashesFront, 0x20)
}
default {
// Otherwise, pop from `leafs`.
a := calldataload(leafsOffset)
leafsOffset := add(leafsOffset, 0x20)
}
let b := 0
// If the flag is false, load the next proof,
// else, pops from the queue.
switch calldataload(flagsOffset)
case 0 {
// Loads the next proof.
b := calldataload(proofOffset)
proofOffset := add(proofOffset, 0x20)
}
default {
// Pops a value from the queue into `a`.
switch lt(leafsOffset, leafsEnd)
case 0 {
// Pop from `hashes` if there are no more leafs.
b := mload(hashesFront)
hashesFront := add(hashesFront, 0x20)
}
default {
// Otherwise, pop from `leafs`.
b := calldataload(leafsOffset)
leafsOffset := add(leafsOffset, 0x20)
}
}
// Advance to the next flag offset.
flagsOffset := add(flagsOffset, 0x20)
// Slot of `a` in scratch space.
// If the condition is true: 0x20, otherwise: 0x00.
let scratch := shl(5, gt(a, b))
// Hash the scratch space and push the result onto the queue.
mstore(scratch, a)
mstore(xor(scratch, 0x20), b)
mstore(hashesBack, keccak256(0x00, 0x40))
hashesBack := add(hashesBack, 0x20)
// prettier-ignore
if iszero(lt(hashesBack, end)) { break }
}
// Checks if the last value in the queue is same as the root.
isValid := eq(mload(sub(hashesBack, 0x20)), root)
break
}
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Library for converting numbers into strings and other string operations.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol)
library LibString {
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* CUSTOM ERRORS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
error HexLengthInsufficient();
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* DECIMAL OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
function toString(uint256 value) internal pure returns (string memory str) {
assembly {
// The maximum value of a uint256 contains 78 digits (1 byte per digit), but
// we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
// We will need 1 word for the trailing zeros padding, 1 word for the length,
// and 3 words for a maximum of 78 digits. Total: 5 * 0x20 = 0xa0.
let m := add(mload(0x40), 0xa0)
// Update the free memory pointer to allocate.
mstore(0x40, m)
// Assign the `str` to the end.
str := sub(m, 0x20)
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end of the memory to calculate the length later.
let end := str
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
// prettier-ignore
for { let temp := value } 1 {} {
str := sub(str, 1)
// Write the character to the pointer.
// The ASCII index of the '0' character is 48.
mstore8(str, add(48, mod(temp, 10)))
// Keep dividing `temp` until zero.
temp := div(temp, 10)
// prettier-ignore
if iszero(temp) { break }
}
let length := sub(end, str)
// Move the pointer 32 bytes leftwards to make room for the length.
str := sub(str, 0x20)
// Store the length.
mstore(str, length)
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* HEXADECIMAL OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) {
assembly {
let start := mload(0x40)
// We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes
// for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length.
// We add 0x20 to the total and round down to a multiple of 0x20.
// (0x20 + 0x20 + 0x02 + 0x20) = 0x62.
let m := add(start, and(add(shl(1, length), 0x62), not(0x1f)))
// Allocate the memory.
mstore(0x40, m)
// Assign the `str` to the end.
str := sub(m, 0x20)
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end to calculate the length later.
let end := str
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
let temp := value
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
// prettier-ignore
for {} 1 {} {
str := sub(str, 2)
mstore8(add(str, 1), mload(and(temp, 15)))
mstore8(str, mload(and(shr(4, temp), 15)))
temp := shr(8, temp)
length := sub(length, 1)
// prettier-ignore
if iszero(length) { break }
}
if temp {
// Store the function selector of `HexLengthInsufficient()`.
mstore(0x00, 0x2194895a)
// Revert with (offset, size).
revert(0x1c, 0x04)
}
// Compute the string's length.
let strLength := add(sub(end, str), 2)
// Move the pointer and write the "0x" prefix.
str := sub(str, 0x20)
mstore(str, 0x3078)
// Move the pointer and write the length.
str := sub(str, 2)
mstore(str, strLength)
}
}
function toHexString(uint256 value) internal pure returns (string memory str) {
assembly {
let start := mload(0x40)
// We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
// 0x02 bytes for the prefix, and 0x40 bytes for the digits.
// The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0.
let m := add(start, 0xa0)
// Allocate the memory.
mstore(0x40, m)
// Assign the `str` to the end.
str := sub(m, 0x20)
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end to calculate the length later.
let end := str
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
// prettier-ignore
for { let temp := value } 1 {} {
str := sub(str, 2)
mstore8(add(str, 1), mload(and(temp, 15)))
mstore8(str, mload(and(shr(4, temp), 15)))
temp := shr(8, temp)
// prettier-ignore
if iszero(temp) { break }
}
// Compute the string's length.
let strLength := add(sub(end, str), 2)
// Move the pointer and write the "0x" prefix.
str := sub(str, 0x20)
mstore(str, 0x3078)
// Move the pointer and write the length.
str := sub(str, 2)
mstore(str, strLength)
}
}
function toHexString(address value) internal pure returns (string memory str) {
assembly {
let start := mload(0x40)
// We need 0x20 bytes for the length, 0x02 bytes for the prefix,
// and 0x28 bytes for the digits.
// The next multiple of 0x20 above (0x20 + 0x02 + 0x28) is 0x60.
str := add(start, 0x60)
// Allocate the memory.
mstore(0x40, str)
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
let length := 20
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
// prettier-ignore
for { let temp := value } 1 {} {
str := sub(str, 2)
mstore8(add(str, 1), mload(and(temp, 15)))
mstore8(str, mload(and(shr(4, temp), 15)))
temp := shr(8, temp)
length := sub(length, 1)
// prettier-ignore
if iszero(length) { break }
}
// Move the pointer and write the "0x" prefix.
str := sub(str, 32)
mstore(str, 0x3078)
// Move the pointer and write the length.
str := sub(str, 2)
mstore(str, 42)
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* OTHER STRING OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
function replace(
string memory subject,
string memory search,
string memory replacement
) internal pure returns (string memory result) {
assembly {
let subjectLength := mload(subject)
let searchLength := mload(search)
let replacementLength := mload(replacement)
subject := add(subject, 0x20)
search := add(search, 0x20)
replacement := add(replacement, 0x20)
result := add(mload(0x40), 0x20)
let subjectEnd := add(subject, subjectLength)
if iszero(gt(searchLength, subjectLength)) {
let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1)
let h := 0
if iszero(lt(searchLength, 32)) {
h := keccak256(search, searchLength)
}
let m := shl(3, sub(32, and(searchLength, 31)))
let s := mload(search)
// prettier-ignore
for {} 1 {} {
let t := mload(subject)
// Whether the first `searchLength % 32` bytes of
// `subject` and `search` matches.
if iszero(shr(m, xor(t, s))) {
if h {
if iszero(eq(keccak256(subject, searchLength), h)) {
mstore(result, t)
result := add(result, 1)
subject := add(subject, 1)
// prettier-ignore
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
}
// Copy the `replacement` one word at a time.
// prettier-ignore
for { let o := 0 } 1 {} {
mstore(add(result, o), mload(add(replacement, o)))
o := add(o, 0x20)
// prettier-ignore
if iszero(lt(o, replacementLength)) { break }
}
result := add(result, replacementLength)
subject := add(subject, searchLength)
if iszero(searchLength) {
mstore(result, t)
result := add(result, 1)
subject := add(subject, 1)
}
// prettier-ignore
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
mstore(result, t)
result := add(result, 1)
subject := add(subject, 1)
// prettier-ignore
if iszero(lt(subject, subjectSearchEnd)) { break }
}
}
let resultRemainder := result
result := add(mload(0x40), 0x20)
let k := add(sub(resultRemainder, result), sub(subjectEnd, subject))
// Copy the rest of the string one word at a time.
// prettier-ignore
for {} lt(subject, subjectEnd) {} {
mstore(resultRemainder, mload(subject))
resultRemainder := add(resultRemainder, 0x20)
subject := add(subject, 0x20)
}
// Allocate memory for the length and the bytes,
// rounded up to a multiple of 32.
mstore(0x40, add(result, and(add(k, 0x40), not(0x1f))))
result := sub(result, 0x20)
mstore(result, k)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Gas optimized ECDSA wrapper.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/ECDSA.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/ECDSA.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/ECDSA.sol)
library ECDSA {
function recover(bytes32 hash, bytes calldata signature) internal view returns (address result) {
assembly {
if eq(signature.length, 65) {
// Copy the free memory pointer so that we can restore it later.
let m := mload(0x40)
// Directly copy `r` and `s` from the calldata.
calldatacopy(0x40, signature.offset, 0x40)
// If `s` in lower half order, such that the signature is not malleable.
// prettier-ignore
if iszero(gt(mload(0x60), 0x7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0)) {
mstore(0x00, hash)
// Compute `v` and store it in the scratch space.
mstore(0x20, byte(0, calldataload(add(signature.offset, 0x40))))
pop(
staticcall(
gas(), // Amount of gas left for the transaction.
0x01, // Address of `ecrecover`.
0x00, // Start of input.
0x80, // Size of input.
0x40, // Start of output.
0x20 // Size of output.
)
)
// Restore the zero slot.
mstore(0x60, 0)
// `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
result := mload(sub(0x60, returndatasize()))
}
// Restore the free memory pointer.
mstore(0x40, m)
}
}
}
function recover(
bytes32 hash,
bytes32 r,
bytes32 vs
) internal view returns (address result) {
assembly {
// Copy the free memory pointer so that we can restore it later.
let m := mload(0x40)
// prettier-ignore
let s := and(vs, 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff)
// If `s` in lower half order, such that the signature is not malleable.
// prettier-ignore
if iszero(gt(s, 0x7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0)) {
mstore(0x00, hash)
mstore(0x20, add(shr(255, vs), 27))
mstore(0x40, r)
mstore(0x60, s)
pop(
staticcall(
gas(), // Amount of gas left for the transaction.
0x01, // Address of `ecrecover`.
0x00, // Start of input.
0x80, // Size of input.
0x40, // Start of output.
0x20 // Size of output.
)
)
// Restore the zero slot.
mstore(0x60, 0)
// `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
result := mload(sub(0x60, returndatasize()))
}
// Restore the free memory pointer.
mstore(0x40, m)
}
}
function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 result) {
assembly {
// Store into scratch space for keccak256.
mstore(0x20, hash)
mstore(0x00, "\x00\x00\x00\x00\x19Ethereum Signed Message:\n32")
// 0x40 - 0x04 = 0x3c
result := keccak256(0x04, 0x3c)
}
}
function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32 result) {
assembly {
// We need at most 128 bytes for Ethereum signed message header.
// The max length of the ASCII reprenstation of a uint256 is 78 bytes.
// The length of "\x19Ethereum Signed Message:\n" is 26 bytes (i.e. 0x1a).
// The next multiple of 32 above 78 + 26 is 128 (i.e. 0x80).
// Instead of allocating, we temporarily copy the 128 bytes before the
// start of `s` data to some variables.
let m3 := mload(sub(s, 0x60))
let m2 := mload(sub(s, 0x40))
let m1 := mload(sub(s, 0x20))
// The length of `s` is in bytes.
let sLength := mload(s)
let ptr := add(s, 0x20)
// `end` marks the end of the memory which we will compute the keccak256 of.
let end := add(ptr, sLength)
// Convert the length of the bytes to ASCII decimal representation
// and store it into the memory.
// prettier-ignore
for { let temp := sLength } 1 {} {
ptr := sub(ptr, 1)
mstore8(ptr, add(48, mod(temp, 10)))
temp := div(temp, 10)
// prettier-ignore
if iszero(temp) { break }
}
// Copy the header over to the memory.
mstore(sub(ptr, 0x20), "\x00\x00\x00\x00\x00\x00\x19Ethereum Signed Message:\n")
// Compute the keccak256 of the memory.
result := keccak256(sub(ptr, 0x1a), sub(end, sub(ptr, 0x1a)))
// Restore the previous memory.
mstore(s, sLength)
mstore(sub(s, 0x20), m1)
mstore(sub(s, 0x40), m2)
mstore(sub(s, 0x60), m3)
}
}
}// SPDX-License-Identifier: MIT
// ERC721A Contracts v4.2.2
// Creator: Chiru Labs
pragma solidity ^0.8.4;
/**
* @dev Interface of ERC721A.
*/
interface IERC721AUpgradeable {
/**
* The caller must own the token or be an approved operator.
*/
error ApprovalCallerNotOwnerNorApproved();
/**
* The token does not exist.
*/
error ApprovalQueryForNonexistentToken();
/**
* The caller cannot approve to their own address.
*/
error ApproveToCaller();
/**
* Cannot query the balance for the zero address.
*/
error BalanceQueryForZeroAddress();
/**
* Cannot mint to the zero address.
*/
error MintToZeroAddress();
/**
* The quantity of tokens minted must be more than zero.
*/
error MintZeroQuantity();
/**
* The token does not exist.
*/
error OwnerQueryForNonexistentToken();
/**
* The caller must own the token or be an approved operator.
*/
error TransferCallerNotOwnerNorApproved();
/**
* The token must be owned by `from`.
*/
error TransferFromIncorrectOwner();
/**
* Cannot safely transfer to a contract that does not implement the
* ERC721Receiver interface.
*/
error TransferToNonERC721ReceiverImplementer();
/**
* Cannot transfer to the zero address.
*/
error TransferToZeroAddress();
/**
* The token does not exist.
*/
error URIQueryForNonexistentToken();
/**
* The `quantity` minted with ERC2309 exceeds the safety limit.
*/
error MintERC2309QuantityExceedsLimit();
/**
* The `extraData` cannot be set on an unintialized ownership slot.
*/
error OwnershipNotInitializedForExtraData();
// =============================================================
// STRUCTS
// =============================================================
struct TokenOwnership {
// The address of the owner.
address addr;
// Stores the start time of ownership with minimal overhead for tokenomics.
uint64 startTimestamp;
// Whether the token has been burned.
bool burned;
// Arbitrary data similar to `startTimestamp` that can be set via {_extraData}.
uint24 extraData;
}
// =============================================================
// TOKEN COUNTERS
// =============================================================
/**
* @dev Returns the total number of tokens in existence.
* Burned tokens will reduce the count.
* To get the total number of tokens minted, please see {_totalMinted}.
*/
function totalSupply() external view returns (uint256);
// =============================================================
// IERC165
// =============================================================
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
* to learn more about how these ids are created.
*
* This function call must use less than 30000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
// =============================================================
// IERC721
// =============================================================
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables
* (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in `owner`'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`,
* checking first that contract recipients are aware of the ERC721 protocol
* to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move
* this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement
* {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
/**
* @dev Equivalent to `safeTransferFrom(from, to, tokenId, '')`.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom}
* whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token
* by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the
* zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom}
* for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}.
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
// =============================================================
// IERC721Metadata
// =============================================================
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
// =============================================================
// IERC2309
// =============================================================
/**
* @dev Emitted when tokens in `fromTokenId` to `toTokenId`
* (inclusive) is transferred from `from` to `to`, as defined in the
* [ERC2309](https://eips.ethereum.org/EIPS/eip-2309) standard.
*
* See {_mintERC2309} for more details.
*/
event ConsecutiveTransfer(uint256 indexed fromTokenId, uint256 toTokenId, address indexed from, address indexed to);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library ERC721AStorage {
// Reference type for token approval.
struct TokenApprovalRef {
address value;
}
struct Layout {
// =============================================================
// STORAGE
// =============================================================
// The next token ID to be minted.
uint256 _currentIndex;
// The number of tokens burned.
uint256 _burnCounter;
// Token name
string _name;
// Token symbol
string _symbol;
// Mapping from token ID to ownership details
// An empty struct value does not necessarily mean the token is unowned.
// See {_packedOwnershipOf} implementation for details.
//
// Bits Layout:
// - [0..159] `addr`
// - [160..223] `startTimestamp`
// - [224] `burned`
// - [225] `nextInitialized`
// - [232..255] `extraData`
mapping(uint256 => uint256) _packedOwnerships;
// Mapping owner address to address data.
//
// Bits Layout:
// - [0..63] `balance`
// - [64..127] `numberMinted`
// - [128..191] `numberBurned`
// - [192..255] `aux`
mapping(address => uint256) _packedAddressData;
// Mapping from token ID to approved address.
mapping(uint256 => ERC721AStorage.TokenApprovalRef) _tokenApprovals;
// Mapping from owner to operator approvals
mapping(address => mapping(address => bool)) _operatorApprovals;
}
bytes32 internal constant STORAGE_SLOT = keccak256('ERC721A.contracts.storage.ERC721A');
function layout() internal pure returns (Layout storage l) {
bytes32 slot = STORAGE_SLOT;
assembly {
l.slot := slot
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/**
* @dev This is a base storage for the initialization function for upgradeable diamond facet contracts
**/
library ERC721A__InitializableStorage {
struct Layout {
/*
* Indicates that the contract has been initialized.
*/
bool _initialized;
/*
* Indicates that the contract is in the process of being initialized.
*/
bool _initializing;
}
bytes32 internal constant STORAGE_SLOT = keccak256("ERC721A.contracts.storage.initializable.facet");
function layout() internal pure returns (Layout storage l) {
bytes32 slot = STORAGE_SLOT;
assembly {
l.slot := slot
}
}
}{
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}Contract ABI
API[{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"ApprovalQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"ApproveToCaller","type":"error"},{"inputs":[],"name":"BalanceEmpty","type":"error"},{"inputs":[],"name":"BalanceQueryForZeroAddress","type":"error"},{"inputs":[],"name":"BurnToMintDisabled","type":"error"},{"inputs":[],"name":"ExcessiveEthSent","type":"error"},{"inputs":[],"name":"InsufficientEthSent","type":"error"},{"inputs":[],"name":"InvalidAmountOfTokens","type":"error"},{"inputs":[],"name":"InvalidConfig","type":"error"},{"inputs":[],"name":"InvalidReferral","type":"error"},{"inputs":[],"name":"InvalidSignature","type":"error"},{"inputs":[],"name":"LockedForever","type":"error"},{"inputs":[],"name":"MaxBatchSizeExceeded","type":"error"},{"inputs":[],"name":"MaxSupplyExceeded","type":"error"},{"inputs":[],"name":"MintERC2309QuantityExceedsLimit","type":"error"},{"inputs":[],"name":"MintNotYetStarted","type":"error"},{"inputs":[],"name":"MintToZeroAddress","type":"error"},{"inputs":[],"name":"MintZeroQuantity","type":"error"},{"inputs":[],"name":"MintingPaused","type":"error"},{"inputs":[],"name":"NotApprovedToTransfer","type":"error"},{"inputs":[],"name":"NotTokenOwner","type":"error"},{"inputs":[],"name":"NumberOfMintsExceeded","type":"error"},{"inputs":[],"name":"OwnerQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"OwnershipNotInitializedForExtraData","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFailed","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToNonERC721ReceiverImplementer","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"URIQueryForNonexistentToken","type":"error"},{"inputs":[],"name":"WalletUnauthorizedToMint","type":"error"},{"inputs":[],"name":"WrongPassword","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"approved","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"fromTokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"toTokenId","type":"uint256"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"ConsecutiveTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"key","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"cid","type":"bytes32"}],"name":"Invited","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"affiliate","type":"address"},{"indexed":false,"internalType":"uint128","name":"wad","type":"uint128"},{"indexed":false,"internalType":"uint256","name":"numMints","type":"uint256"}],"name":"Referral","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":true,"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"src","type":"address"},{"indexed":false,"internalType":"uint128","name":"wad","type":"uint128"}],"name":"Withdrawal","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"affiliateBalance","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"affiliateFeeUnlocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"burnConfig","outputs":[{"internalType":"contract Archetype","name":"archetype","type":"address"},{"internalType":"bool","name":"enabled","type":"bool"},{"internalType":"uint16","name":"ratio","type":"uint16"},{"internalType":"uint64","name":"start","type":"uint64"},{"internalType":"uint64","name":"limit","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"burnToMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint128","name":"price","type":"uint128"},{"internalType":"uint256","name":"numTokens","type":"uint256"},{"internalType":"bool","name":"affiliateUsed","type":"bool"}],"name":"computePrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"config","outputs":[{"internalType":"string","name":"unrevealedUri","type":"string"},{"internalType":"string","name":"baseUri","type":"string"},{"internalType":"address","name":"affiliateSigner","type":"address"},{"internalType":"address","name":"ownerAltPayout","type":"address"},{"internalType":"address","name":"superAffiliatePayout","type":"address"},{"internalType":"uint32","name":"maxSupply","type":"uint32"},{"internalType":"uint32","name":"maxBatchSize","type":"uint32"},{"internalType":"uint16","name":"affiliateFee","type":"uint16"},{"internalType":"uint16","name":"platformFee","type":"uint16"},{"components":[{"internalType":"uint16","name":"affiliateDiscount","type":"uint16"},{"components":[{"internalType":"uint16","name":"numMints","type":"uint16"},{"internalType":"uint16","name":"mintDiscount","type":"uint16"}],"internalType":"struct Archetype.MintTier[]","name":"mintTiers","type":"tuple[]"}],"internalType":"struct Archetype.Discount","name":"discounts","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"disableBurnToMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"discountsUnlocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"archetype","type":"address"},{"internalType":"uint16","name":"ratio","type":"uint16"},{"internalType":"uint64","name":"start","type":"uint64"},{"internalType":"uint64","name":"limit","type":"uint64"}],"name":"enableBurnToMint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getTokenMsg","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"components":[{"internalType":"string","name":"unrevealedUri","type":"string"},{"internalType":"string","name":"baseUri","type":"string"},{"internalType":"address","name":"affiliateSigner","type":"address"},{"internalType":"address","name":"ownerAltPayout","type":"address"},{"internalType":"address","name":"superAffiliatePayout","type":"address"},{"internalType":"uint32","name":"maxSupply","type":"uint32"},{"internalType":"uint32","name":"maxBatchSize","type":"uint32"},{"internalType":"uint16","name":"affiliateFee","type":"uint16"},{"internalType":"uint16","name":"platformFee","type":"uint16"},{"components":[{"internalType":"uint16","name":"affiliateDiscount","type":"uint16"},{"components":[{"internalType":"uint16","name":"numMints","type":"uint16"},{"internalType":"uint16","name":"mintDiscount","type":"uint16"}],"internalType":"struct Archetype.MintTier[]","name":"mintTiers","type":"tuple[]"}],"internalType":"struct Archetype.Discount","name":"discounts","type":"tuple"}],"internalType":"struct Archetype.Config","name":"config_","type":"tuple"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"invites","outputs":[{"internalType":"uint128","name":"price","type":"uint128"},{"internalType":"uint64","name":"start","type":"uint64"},{"internalType":"uint64","name":"limit","type":"uint64"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockAffiliateFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockDiscounts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockMaxSupply","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockOwnerAltPayout","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockProvenanceHash","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"password","type":"string"}],"name":"lockURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxSupplyUnlocked","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"key","type":"bytes32"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"}],"internalType":"struct Archetype.Auth","name":"auth","type":"tuple"},{"internalType":"uint256","name":"quantity","type":"uint256"},{"internalType":"address","name":"affiliate","type":"address"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"mint","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"internalType":"bytes32","name":"key","type":"bytes32"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"}],"internalType":"struct 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Multichain Portfolio | 34 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.