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ERC-721
NFT
OpenSeaOverview
Max Total Supply
0 GOBBLER
Holders
752
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
5 GOBBLERLoading...
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| # | Exchange | Pair | Price | 24H Volume | % Volume |
|---|
Contract Name:
ArtGobblers
Compiler Version
v0.8.13+commit.abaa5c0e
Optimization Enabled:
Yes with 1000000 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
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import {Owned} from "solmate/auth/Owned.sol";
import {ERC721} from "solmate/tokens/ERC721.sol";
import {LibString} from "solmate/utils/LibString.sol";
import {MerkleProofLib} from "solmate/utils/MerkleProofLib.sol";
import {FixedPointMathLib} from "solmate/utils/FixedPointMathLib.sol";
import {ERC1155, ERC1155TokenReceiver} from "solmate/tokens/ERC1155.sol";
import {toWadUnsafe, toDaysWadUnsafe} from "solmate/utils/SignedWadMath.sol";
import {LibGOO} from "goo-issuance/LibGOO.sol";
import {LogisticVRGDA} from "VRGDAs/LogisticVRGDA.sol";
import {RandProvider} from "./utils/rand/RandProvider.sol";
import {GobblersERC721} from "./utils/token/GobblersERC721.sol";
import {Goo} from "./Goo.sol";
import {Pages} from "./Pages.sol";
/// @title Art Gobblers NFT
/// @author FrankieIsLost <[email protected]>
/// @author transmissions11 <[email protected]>
/// @notice An experimental decentralized art factory by Justin Roiland and Paradigm.
contract ArtGobblers is GobblersERC721, LogisticVRGDA, Owned, ERC1155TokenReceiver {
using LibString for uint256;
using FixedPointMathLib for uint256;
/*//////////////////////////////////////////////////////////////
ADDRESSES
//////////////////////////////////////////////////////////////*/
/// @notice The address of the Goo ERC20 token contract.
Goo public immutable goo;
/// @notice The address of the Pages ERC721 token contract.
Pages public immutable pages;
/// @notice The address which receives gobblers reserved for the team.
address public immutable team;
/// @notice The address which receives gobblers reserved for the community.
address public immutable community;
/// @notice The address of a randomness provider. This provider will initially be
/// a wrapper around Chainlink VRF v1, but can be changed in case it is fully sunset.
RandProvider public randProvider;
/*//////////////////////////////////////////////////////////////
SUPPLY CONSTANTS
//////////////////////////////////////////////////////////////*/
/// @notice Maximum number of mintable gobblers.
uint256 public constant MAX_SUPPLY = 10000;
/// @notice Maximum amount of gobblers mintable via mintlist.
uint256 public constant MINTLIST_SUPPLY = 2000;
/// @notice Maximum amount of mintable legendary gobblers.
uint256 public constant LEGENDARY_SUPPLY = 10;
/// @notice Maximum amount of gobblers split between the reserves.
/// @dev Set to comprise 20% of the sum of goo mintable gobblers + reserved gobblers.
uint256 public constant RESERVED_SUPPLY = (MAX_SUPPLY - MINTLIST_SUPPLY - LEGENDARY_SUPPLY) / 5;
/// @notice Maximum amount of gobblers that can be minted via VRGDA.
// prettier-ignore
uint256 public constant MAX_MINTABLE = MAX_SUPPLY
- MINTLIST_SUPPLY
- LEGENDARY_SUPPLY
- RESERVED_SUPPLY;
/*//////////////////////////////////////////////////////////////
METADATA CONSTANTS
//////////////////////////////////////////////////////////////*/
/// @notice Provenance hash for gobbler metadata.
bytes32 public immutable PROVENANCE_HASH;
/// @notice URI for gobblers pending reveal.
string public UNREVEALED_URI;
/// @notice Base URI for minted gobblers.
string public BASE_URI;
/*//////////////////////////////////////////////////////////////
MINTLIST STATE
//////////////////////////////////////////////////////////////*/
/// @notice Merkle root of mint mintlist.
bytes32 public immutable merkleRoot;
/// @notice Mapping to keep track of which addresses have claimed from mintlist.
mapping(address => bool) public hasClaimedMintlistGobbler;
/*//////////////////////////////////////////////////////////////
VRGDA INPUT STATE
//////////////////////////////////////////////////////////////*/
/// @notice Timestamp for the start of minting.
uint256 public immutable mintStart;
/// @notice Number of gobblers minted from goo.
uint128 public numMintedFromGoo;
/*//////////////////////////////////////////////////////////////
STANDARD GOBBLER STATE
//////////////////////////////////////////////////////////////*/
/// @notice Id of the most recently minted non legendary gobbler.
/// @dev Will be 0 if no non legendary gobblers have been minted yet.
uint128 public currentNonLegendaryId;
/// @notice The number of gobblers minted to the reserves.
uint256 public numMintedForReserves;
/*//////////////////////////////////////////////////////////////
LEGENDARY GOBBLER AUCTION STATE
//////////////////////////////////////////////////////////////*/
/// @notice Initial legendary gobbler auction price.
uint256 public constant LEGENDARY_GOBBLER_INITIAL_START_PRICE = 69;
/// @notice The last LEGENDARY_SUPPLY ids are reserved for legendary gobblers.
uint256 public constant FIRST_LEGENDARY_GOBBLER_ID = MAX_SUPPLY - LEGENDARY_SUPPLY + 1;
/// @notice Legendary auctions begin each time a multiple of these many gobblers have been minted from goo.
/// @dev We add 1 to LEGENDARY_SUPPLY because legendary auctions begin only after the first interval.
uint256 public constant LEGENDARY_AUCTION_INTERVAL = MAX_MINTABLE / (LEGENDARY_SUPPLY + 1);
/// @notice Struct holding data required for legendary gobbler auctions.
struct LegendaryGobblerAuctionData {
// Start price of current legendary gobbler auction.
uint128 startPrice;
// Number of legendary gobblers sold so far.
uint128 numSold;
}
/// @notice Data about the current legendary gobbler auction.
LegendaryGobblerAuctionData public legendaryGobblerAuctionData;
/*//////////////////////////////////////////////////////////////
GOBBLER REVEAL STATE
//////////////////////////////////////////////////////////////*/
/// @notice Struct holding data required for gobbler reveals.
struct GobblerRevealsData {
// Last randomness obtained from the rand provider.
uint64 randomSeed;
// Next reveal cannot happen before this timestamp.
uint64 nextRevealTimestamp;
// Id of latest gobbler which has been revealed so far.
uint64 lastRevealedId;
// Remaining gobblers to be revealed with the current seed.
uint56 toBeRevealed;
// Whether we are waiting to receive a seed from the provider.
bool waitingForSeed;
}
/// @notice Data about the current state of gobbler reveals.
GobblerRevealsData public gobblerRevealsData;
/*//////////////////////////////////////////////////////////////
GOBBLED ART STATE
//////////////////////////////////////////////////////////////*/
/// @notice Maps gobbler ids to NFT contracts and their ids to the # of those NFT ids gobbled by the gobbler.
mapping(uint256 => mapping(address => mapping(uint256 => uint256))) public getCopiesOfArtGobbledByGobbler;
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event GooBalanceUpdated(address indexed user, uint256 newGooBalance);
event GobblerClaimed(address indexed user, uint256 indexed gobblerId);
event GobblerPurchased(address indexed user, uint256 indexed gobblerId, uint256 price);
event LegendaryGobblerMinted(address indexed user, uint256 indexed gobblerId, uint256[] burnedGobblerIds);
event ReservedGobblersMinted(address indexed user, uint256 lastMintedGobblerId, uint256 numGobblersEach);
event RandomnessFulfilled(uint256 randomness);
event RandomnessRequested(address indexed user, uint256 toBeRevealed);
event RandProviderUpgraded(address indexed user, RandProvider indexed newRandProvider);
event GobblersRevealed(address indexed user, uint256 numGobblers, uint256 lastRevealedId);
event ArtGobbled(address indexed user, uint256 indexed gobblerId, address indexed nft, uint256 id);
/*//////////////////////////////////////////////////////////////
ERRORS
//////////////////////////////////////////////////////////////*/
error InvalidProof();
error AlreadyClaimed();
error MintStartPending();
error SeedPending();
error RevealsPending();
error RequestTooEarly();
error ZeroToBeRevealed();
error NotRandProvider();
error ReserveImbalance();
error Cannibalism();
error OwnerMismatch(address owner);
error NoRemainingLegendaryGobblers();
error CannotBurnLegendary(uint256 gobblerId);
error InsufficientGobblerAmount(uint256 cost);
error LegendaryAuctionNotStarted(uint256 gobblersLeft);
error PriceExceededMax(uint256 currentPrice);
error NotEnoughRemainingToBeRevealed(uint256 totalRemainingToBeRevealed);
error UnauthorizedCaller(address caller);
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Sets VRGDA parameters, mint config, relevant addresses, and URIs.
/// @param _merkleRoot Merkle root of mint mintlist.
/// @param _mintStart Timestamp for the start of the VRGDA mint.
/// @param _goo Address of the Goo contract.
/// @param _team Address of the team reserve.
/// @param _community Address of the community reserve.
/// @param _randProvider Address of the randomness provider.
/// @param _baseUri Base URI for revealed gobblers.
/// @param _unrevealedUri URI for unrevealed gobblers.
/// @param _provenanceHash Provenance Hash for gobbler metadata.
constructor(
// Mint config:
bytes32 _merkleRoot,
uint256 _mintStart,
// Addresses:
Goo _goo,
Pages _pages,
address _team,
address _community,
RandProvider _randProvider,
// URIs:
string memory _baseUri,
string memory _unrevealedUri,
// Provenance:
bytes32 _provenanceHash
)
GobblersERC721("Art Gobblers", "GOBBLER")
Owned(msg.sender)
LogisticVRGDA(
69.42e18, // Target price.
0.31e18, // Price decay percent.
// Max gobblers mintable via VRGDA.
toWadUnsafe(MAX_MINTABLE),
0.0023e18 // Time scale.
)
{
mintStart = _mintStart;
merkleRoot = _merkleRoot;
goo = _goo;
pages = _pages;
team = _team;
community = _community;
randProvider = _randProvider;
BASE_URI = _baseUri;
UNREVEALED_URI = _unrevealedUri;
PROVENANCE_HASH = _provenanceHash;
// Set the starting price for the first legendary gobbler auction.
legendaryGobblerAuctionData.startPrice = uint128(LEGENDARY_GOBBLER_INITIAL_START_PRICE);
// Reveal for initial mint must wait a day from the start of the mint.
gobblerRevealsData.nextRevealTimestamp = uint64(_mintStart + 1 days);
}
/*//////////////////////////////////////////////////////////////
MINTLIST CLAIM LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Claim from mintlist, using a merkle proof.
/// @dev Function does not directly enforce the MINTLIST_SUPPLY limit for gas efficiency. The
/// limit is enforced during the creation of the merkle proof, which will be shared publicly.
/// @param proof Merkle proof to verify the sender is mintlisted.
/// @return gobblerId The id of the gobbler that was claimed.
function claimGobbler(bytes32[] calldata proof) external returns (uint256 gobblerId) {
// If minting has not yet begun, revert.
if (mintStart > block.timestamp) revert MintStartPending();
// If the user has already claimed, revert.
if (hasClaimedMintlistGobbler[msg.sender]) revert AlreadyClaimed();
// If the user's proof is invalid, revert.
if (!MerkleProofLib.verify(proof, merkleRoot, keccak256(abi.encodePacked(msg.sender)))) revert InvalidProof();
hasClaimedMintlistGobbler[msg.sender] = true;
unchecked {
// Overflow should be impossible due to supply cap of 10,000.
emit GobblerClaimed(msg.sender, gobblerId = ++currentNonLegendaryId);
}
_mint(msg.sender, gobblerId);
}
/*//////////////////////////////////////////////////////////////
MINTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Mint a gobbler, paying with goo.
/// @param maxPrice Maximum price to pay to mint the gobbler.
/// @param useVirtualBalance Whether the cost is paid from the
/// user's virtual goo balance, or from their ERC20 goo balance.
/// @return gobblerId The id of the gobbler that was minted.
function mintFromGoo(uint256 maxPrice, bool useVirtualBalance) external returns (uint256 gobblerId) {
// No need to check if we're at MAX_MINTABLE,
// gobblerPrice() will revert once we reach it due to its
// logistic nature. It will also revert prior to the mint start.
uint256 currentPrice = gobblerPrice();
// If the current price is above the user's specified max, revert.
if (currentPrice > maxPrice) revert PriceExceededMax(currentPrice);
// Decrement the user's goo balance by the current
// price, either from virtual balance or ERC20 balance.
useVirtualBalance
? updateUserGooBalance(msg.sender, currentPrice, GooBalanceUpdateType.DECREASE)
: goo.burnForGobblers(msg.sender, currentPrice);
unchecked {
++numMintedFromGoo; // Overflow should be impossible due to the supply cap.
emit GobblerPurchased(msg.sender, gobblerId = ++currentNonLegendaryId, currentPrice);
}
_mint(msg.sender, gobblerId);
}
/// @notice Gobbler pricing in terms of goo.
/// @dev Will revert if called before minting starts
/// or after all gobblers have been minted via VRGDA.
/// @return Current price of a gobbler in terms of goo.
function gobblerPrice() public view returns (uint256) {
// We need checked math here to cause underflow
// before minting has begun, preventing mints.
uint256 timeSinceStart = block.timestamp - mintStart;
return getVRGDAPrice(toDaysWadUnsafe(timeSinceStart), numMintedFromGoo);
}
/*//////////////////////////////////////////////////////////////
LEGENDARY GOBBLER AUCTION LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Mint a legendary gobbler by burning multiple standard gobblers.
/// @param gobblerIds The ids of the standard gobblers to burn.
/// @return gobblerId The id of the legendary gobbler that was minted.
function mintLegendaryGobbler(uint256[] calldata gobblerIds) external returns (uint256 gobblerId) {
// Get the number of legendary gobblers sold up until this point.
uint256 numSold = legendaryGobblerAuctionData.numSold;
gobblerId = FIRST_LEGENDARY_GOBBLER_ID + numSold; // Assign id.
// This will revert if the auction hasn't started yet or legendaries
// have sold out entirely, so there is no need to check here as well.
uint256 cost = legendaryGobblerPrice();
if (gobblerIds.length < cost) revert InsufficientGobblerAmount(cost);
// Overflow should not occur in here, as most math is on emission multiples, which are inherently small.
unchecked {
uint256 burnedMultipleTotal; // The legendary's emissionMultiple will be 2x the sum of the gobblers burned.
/*//////////////////////////////////////////////////////////////
BATCH BURN LOGIC
//////////////////////////////////////////////////////////////*/
uint256 id; // Storing outside the loop saves ~7 gas per iteration.
for (uint256 i = 0; i < cost; ++i) {
id = gobblerIds[i];
if (id >= FIRST_LEGENDARY_GOBBLER_ID) revert CannotBurnLegendary(id);
GobblerData storage gobbler = getGobblerData[id];
require(gobbler.owner == msg.sender, "WRONG_FROM");
burnedMultipleTotal += gobbler.emissionMultiple;
delete getApproved[id];
emit Transfer(msg.sender, gobbler.owner = address(0), id);
}
/*//////////////////////////////////////////////////////////////
LEGENDARY MINTING LOGIC
//////////////////////////////////////////////////////////////*/
// The legendary's emissionMultiple is 2x the sum of the multiples of the gobblers burned.
getGobblerData[gobblerId].emissionMultiple = uint32(burnedMultipleTotal * 2);
// Update the user's user data struct in one big batch. We add burnedMultipleTotal to their
// emission multiple (not burnedMultipleTotal * 2) to account for the standard gobblers that
// were burned and hence should have their multiples subtracted from the user's total multiple.
getUserData[msg.sender].lastBalance = uint128(gooBalance(msg.sender)); // Checkpoint balance.
getUserData[msg.sender].lastTimestamp = uint64(block.timestamp); // Store time alongside it.
getUserData[msg.sender].emissionMultiple += uint32(burnedMultipleTotal); // Update multiple.
// Update the total number of gobblers owned by the user. The call to _mint
// below will increase the count by 1 to account for the new legendary gobbler.
getUserData[msg.sender].gobblersOwned -= uint32(cost);
// New start price is the max of LEGENDARY_GOBBLER_INITIAL_START_PRICE and cost * 2.
legendaryGobblerAuctionData.startPrice = uint128(
cost <= LEGENDARY_GOBBLER_INITIAL_START_PRICE / 2 ? LEGENDARY_GOBBLER_INITIAL_START_PRICE : cost * 2
);
legendaryGobblerAuctionData.numSold = uint128(numSold + 1); // Increment the # of legendaries sold.
// If gobblerIds has 1,000 elements this should cost around ~270,000 gas.
emit LegendaryGobblerMinted(msg.sender, gobblerId, gobblerIds[:cost]);
_mint(msg.sender, gobblerId);
}
}
/// @notice Calculate the legendary gobbler price in terms of gobblers, according to a linear decay function.
/// @dev The price of a legendary gobbler decays as gobblers are minted. The first legendary auction begins when
/// 1 LEGENDARY_AUCTION_INTERVAL worth of gobblers are minted, and the price decays linearly while the next interval of
/// gobblers are minted. Every time an additional interval is minted, a new auction begins until all legendaries have been sold.
/// @dev Will revert if the auction hasn't started yet or legendaries have sold out entirely.
/// @return The current price of the legendary gobbler being auctioned, in terms of gobblers.
function legendaryGobblerPrice() public view returns (uint256) {
// Retrieve and cache various auction parameters and variables.
uint256 startPrice = legendaryGobblerAuctionData.startPrice;
uint256 numSold = legendaryGobblerAuctionData.numSold;
// If all legendary gobblers have been sold, there are none left to auction.
if (numSold == LEGENDARY_SUPPLY) revert NoRemainingLegendaryGobblers();
unchecked {
// Get and cache the number of standard gobblers sold via VRGDA up until this point.
uint256 mintedFromGoo = numMintedFromGoo;
// The number of gobblers minted at the start of the auction is computed by multiplying the # of
// intervals that must pass before the next auction begins by the number of gobblers in each interval.
uint256 numMintedAtStart = (numSold + 1) * LEGENDARY_AUCTION_INTERVAL;
// If not enough gobblers have been minted to start the auction yet, return how many need to be minted.
if (numMintedAtStart > mintedFromGoo) revert LegendaryAuctionNotStarted(numMintedAtStart - mintedFromGoo);
// Compute how many gobblers were minted since the auction began.
uint256 numMintedSinceStart = mintedFromGoo - numMintedAtStart;
// prettier-ignore
// If we've minted the full interval or beyond it, the price has decayed to 0.
if (numMintedSinceStart >= LEGENDARY_AUCTION_INTERVAL) return 0;
// Otherwise decay the price linearly based on what fraction of the interval has been minted.
else return FixedPointMathLib.unsafeDivUp(startPrice * (LEGENDARY_AUCTION_INTERVAL - numMintedSinceStart), LEGENDARY_AUCTION_INTERVAL);
}
}
/*//////////////////////////////////////////////////////////////
RANDOMNESS LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Request a new random seed for revealing gobblers.
function requestRandomSeed() external returns (bytes32) {
uint256 nextRevealTimestamp = gobblerRevealsData.nextRevealTimestamp;
// A new random seed cannot be requested before the next reveal timestamp.
if (block.timestamp < nextRevealTimestamp) revert RequestTooEarly();
// A random seed can only be requested when all gobblers from the previous seed have been revealed.
// This prevents a user from requesting additional randomness in hopes of a more favorable outcome.
if (gobblerRevealsData.toBeRevealed != 0) revert RevealsPending();
unchecked {
// Prevent revealing while we wait for the seed.
gobblerRevealsData.waitingForSeed = true;
// Compute the number of gobblers to be revealed with the seed.
uint256 toBeRevealed = currentNonLegendaryId - gobblerRevealsData.lastRevealedId;
// Ensure that there are more than 0 gobblers to be revealed,
// otherwise the contract could waste LINK revealing nothing.
if (toBeRevealed == 0) revert ZeroToBeRevealed();
// Lock in the number of gobblers to be revealed from seed.
gobblerRevealsData.toBeRevealed = uint56(toBeRevealed);
// We enable reveals for a set of gobblers every 24 hours.
// Timestamp overflow is impossible on human timescales.
gobblerRevealsData.nextRevealTimestamp = uint64(nextRevealTimestamp + 1 days);
emit RandomnessRequested(msg.sender, toBeRevealed);
}
// Call out to the randomness provider.
return randProvider.requestRandomBytes();
}
/// @notice Callback from rand provider. Sets randomSeed. Can only be called by the rand provider.
/// @param randomness The 256 bits of verifiable randomness provided by the rand provider.
function acceptRandomSeed(bytes32, uint256 randomness) external {
// The caller must be the randomness provider, revert in the case it's not.
if (msg.sender != address(randProvider)) revert NotRandProvider();
// The unchecked cast to uint64 is equivalent to moduloing the randomness by 2**64.
gobblerRevealsData.randomSeed = uint64(randomness); // 64 bits of randomness is plenty.
gobblerRevealsData.waitingForSeed = false; // We have the seed now, open up reveals.
emit RandomnessFulfilled(randomness);
}
/// @notice Upgrade the rand provider contract. Useful if current VRF is sunset.
/// @param newRandProvider The new randomness provider contract address.
function upgradeRandProvider(RandProvider newRandProvider) external onlyOwner {
// Reset reveal state when we upgrade while the seed is pending. This gives us a
// safeguard against malfunctions since we won't be stuck waiting for a seed forever.
if (gobblerRevealsData.waitingForSeed) {
gobblerRevealsData.waitingForSeed = false;
gobblerRevealsData.toBeRevealed = 0;
gobblerRevealsData.nextRevealTimestamp -= 1 days;
}
randProvider = newRandProvider; // Update the randomness provider.
emit RandProviderUpgraded(msg.sender, newRandProvider);
}
/*//////////////////////////////////////////////////////////////
GOBBLER REVEAL LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Knuth shuffle to progressively reveal
/// new gobblers using entropy from a random seed.
/// @param numGobblers The number of gobblers to reveal.
function revealGobblers(uint256 numGobblers) external {
uint256 randomSeed = gobblerRevealsData.randomSeed;
uint256 lastRevealedId = gobblerRevealsData.lastRevealedId;
uint256 totalRemainingToBeRevealed = gobblerRevealsData.toBeRevealed;
// Can't reveal if we're still waiting for a new seed.
if (gobblerRevealsData.waitingForSeed) revert SeedPending();
// Can't reveal more gobblers than are currently remaining to be revealed with the seed.
if (numGobblers > totalRemainingToBeRevealed) revert NotEnoughRemainingToBeRevealed(totalRemainingToBeRevealed);
// Implements a Knuth shuffle. If something in
// here can overflow, we've got bigger problems.
unchecked {
for (uint256 i = 0; i < numGobblers; ++i) {
/*//////////////////////////////////////////////////////////////
DETERMINE RANDOM SWAP
//////////////////////////////////////////////////////////////*/
// Number of ids that have not been revealed. Subtract 1
// because we don't want to include any legendaries in the swap.
uint256 remainingIds = FIRST_LEGENDARY_GOBBLER_ID - lastRevealedId - 1;
// Randomly pick distance for swap.
uint256 distance = randomSeed % remainingIds;
// Current id is consecutive to last reveal.
uint256 currentId = ++lastRevealedId;
// Select swap id, adding distance to next reveal id.
uint256 swapId = currentId + distance;
/*//////////////////////////////////////////////////////////////
GET INDICES FOR IDS
//////////////////////////////////////////////////////////////*/
// Get the index of the swap id.
uint64 swapIndex = getGobblerData[swapId].idx == 0
? uint64(swapId) // Hasn't been shuffled before.
: getGobblerData[swapId].idx; // Shuffled before.
// Get the owner of the current id.
address currentIdOwner = getGobblerData[currentId].owner;
// Get the index of the current id.
uint64 currentIndex = getGobblerData[currentId].idx == 0
? uint64(currentId) // Hasn't been shuffled before.
: getGobblerData[currentId].idx; // Shuffled before.
/*//////////////////////////////////////////////////////////////
SWAP INDICES AND SET MULTIPLE
//////////////////////////////////////////////////////////////*/
// Determine the current id's new emission multiple.
uint256 newCurrentIdMultiple = 9; // For beyond 7963.
// The branchless expression below is equivalent to:
// if (swapIndex <= 3054) newCurrentIdMultiple = 6;
// else if (swapIndex <= 5672) newCurrentIdMultiple = 7;
// else if (swapIndex <= 7963) newCurrentIdMultiple = 8;
assembly {
// prettier-ignore
newCurrentIdMultiple := sub(sub(sub(
newCurrentIdMultiple,
lt(swapIndex, 7964)),
lt(swapIndex, 5673)),
lt(swapIndex, 3055)
)
}
// Swap the index and multiple of the current id.
getGobblerData[currentId].idx = swapIndex;
getGobblerData[currentId].emissionMultiple = uint32(newCurrentIdMultiple);
// Swap the index of the swap id.
getGobblerData[swapId].idx = currentIndex;
/*//////////////////////////////////////////////////////////////
UPDATE CURRENT ID MULTIPLE
//////////////////////////////////////////////////////////////*/
// Update the user data for the owner of the current id.
getUserData[currentIdOwner].lastBalance = uint128(gooBalance(currentIdOwner));
getUserData[currentIdOwner].lastTimestamp = uint64(block.timestamp);
getUserData[currentIdOwner].emissionMultiple += uint32(newCurrentIdMultiple);
// Update the random seed to choose a new distance for the next iteration.
// It is critical that we cast to uint64 here, as otherwise the random seed
// set after calling revealGobblers(1) thrice would differ from the seed set
// after calling revealGobblers(3) a single time. This would enable an attacker
// to choose from a number of different seeds and use whichever is most favorable.
// Equivalent to randomSeed = uint64(uint256(keccak256(abi.encodePacked(randomSeed))))
assembly {
mstore(0, randomSeed) // Store the random seed in scratch space.
// Moduloing by 2 ** 64 is equivalent to a uint64 cast.
randomSeed := mod(keccak256(0, 32), exp(2, 64))
}
}
// Update all relevant reveal state.
gobblerRevealsData.randomSeed = uint64(randomSeed);
gobblerRevealsData.lastRevealedId = uint64(lastRevealedId);
gobblerRevealsData.toBeRevealed = uint56(totalRemainingToBeRevealed - numGobblers);
emit GobblersRevealed(msg.sender, numGobblers, lastRevealedId);
}
}
/*//////////////////////////////////////////////////////////////
URI LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Returns a token's URI if it has been minted.
/// @param gobblerId The id of the token to get the URI for.
function tokenURI(uint256 gobblerId) public view virtual override returns (string memory) {
// Between 0 and lastRevealed are revealed normal gobblers.
if (gobblerId <= gobblerRevealsData.lastRevealedId) {
if (gobblerId == 0) revert("NOT_MINTED"); // 0 is not a valid id for Art Gobblers.
return string.concat(BASE_URI, uint256(getGobblerData[gobblerId].idx).toString());
}
// Between lastRevealed + 1 and currentNonLegendaryId are minted but not revealed.
if (gobblerId <= currentNonLegendaryId) return UNREVEALED_URI;
// Between currentNonLegendaryId and FIRST_LEGENDARY_GOBBLER_ID are unminted.
if (gobblerId < FIRST_LEGENDARY_GOBBLER_ID) revert("NOT_MINTED");
// Between FIRST_LEGENDARY_GOBBLER_ID and FIRST_LEGENDARY_GOBBLER_ID + numSold are minted legendaries.
if (gobblerId < FIRST_LEGENDARY_GOBBLER_ID + legendaryGobblerAuctionData.numSold)
return string.concat(BASE_URI, gobblerId.toString());
revert("NOT_MINTED"); // Unminted legendaries and invalid token ids.
}
/*//////////////////////////////////////////////////////////////
GOBBLE ART LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Feed a gobbler a work of art.
/// @param gobblerId The gobbler to feed the work of art.
/// @param nft The ERC721 or ERC1155 contract of the work of art.
/// @param id The id of the work of art.
/// @param isERC1155 Whether the work of art is an ERC1155 token.
function gobble(
uint256 gobblerId,
address nft,
uint256 id,
bool isERC1155
) external {
// Get the owner of the gobbler to feed.
address owner = getGobblerData[gobblerId].owner;
// The caller must own the gobbler they're feeding.
if (owner != msg.sender) revert OwnerMismatch(owner);
// Gobblers have taken a vow not to eat other gobblers.
if (nft == address(this)) revert Cannibalism();
unchecked {
// Increment the # of copies gobbled by the gobbler. Unchecked is
// safe, as an NFT can't have more than type(uint256).max copies.
++getCopiesOfArtGobbledByGobbler[gobblerId][nft][id];
}
emit ArtGobbled(msg.sender, gobblerId, nft, id);
isERC1155
? ERC1155(nft).safeTransferFrom(msg.sender, address(this), id, 1, "")
: ERC721(nft).transferFrom(msg.sender, address(this), id);
}
/*//////////////////////////////////////////////////////////////
GOO LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Calculate a user's virtual goo balance.
/// @param user The user to query balance for.
function gooBalance(address user) public view returns (uint256) {
// Compute the user's virtual goo balance using LibGOO.
// prettier-ignore
return LibGOO.computeGOOBalance(
getUserData[user].emissionMultiple,
getUserData[user].lastBalance,
uint256(toDaysWadUnsafe(block.timestamp - getUserData[user].lastTimestamp))
);
}
/// @notice Add goo to your emission balance,
/// burning the corresponding ERC20 balance.
/// @param gooAmount The amount of goo to add.
function addGoo(uint256 gooAmount) external {
// Burn goo being added to gobbler.
goo.burnForGobblers(msg.sender, gooAmount);
// Increase msg.sender's virtual goo balance.
updateUserGooBalance(msg.sender, gooAmount, GooBalanceUpdateType.INCREASE);
}
/// @notice Remove goo from your emission balance, and
/// add the corresponding amount to your ERC20 balance.
/// @param gooAmount The amount of goo to remove.
function removeGoo(uint256 gooAmount) external {
// Decrease msg.sender's virtual goo balance.
updateUserGooBalance(msg.sender, gooAmount, GooBalanceUpdateType.DECREASE);
// Mint the corresponding amount of ERC20 goo.
goo.mintForGobblers(msg.sender, gooAmount);
}
/// @notice Burn an amount of a user's virtual goo balance. Only callable
/// by the Pages contract to enable purchasing pages with virtual balance.
/// @param user The user whose virtual goo balance we should burn from.
/// @param gooAmount The amount of goo to burn from the user's virtual balance.
function burnGooForPages(address user, uint256 gooAmount) external {
// The caller must be the Pages contract, revert otherwise.
if (msg.sender != address(pages)) revert UnauthorizedCaller(msg.sender);
// Burn the requested amount of goo from the user's virtual goo balance.
// Will revert if the user doesn't have enough goo in their virtual balance.
updateUserGooBalance(user, gooAmount, GooBalanceUpdateType.DECREASE);
}
/// @dev An enum for representing whether to
/// increase or decrease a user's goo balance.
enum GooBalanceUpdateType {
INCREASE,
DECREASE
}
/// @notice Update a user's virtual goo balance.
/// @param user The user whose virtual goo balance we should update.
/// @param gooAmount The amount of goo to update the user's virtual balance by.
/// @param updateType Whether to increase or decrease the user's balance by gooAmount.
function updateUserGooBalance(
address user,
uint256 gooAmount,
GooBalanceUpdateType updateType
) internal {
// Will revert due to underflow if we're decreasing by more than the user's current balance.
// Don't need to do checked addition in the increase case, but we do it anyway for convenience.
uint256 updatedBalance = updateType == GooBalanceUpdateType.INCREASE
? gooBalance(user) + gooAmount
: gooBalance(user) - gooAmount;
// Snapshot the user's new goo balance with the current timestamp.
getUserData[user].lastBalance = uint128(updatedBalance);
getUserData[user].lastTimestamp = uint64(block.timestamp);
emit GooBalanceUpdated(user, updatedBalance);
}
/*//////////////////////////////////////////////////////////////
RESERVED GOBBLERS MINTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Mint a number of gobblers to the reserves.
/// @param numGobblersEach The number of gobblers to mint to each reserve.
/// @dev Gobblers minted to reserves cannot comprise more than 20% of the sum of
/// the supply of goo minted gobblers and the supply of gobblers minted to reserves.
function mintReservedGobblers(uint256 numGobblersEach) external returns (uint256 lastMintedGobblerId) {
unchecked {
// Optimistically increment numMintedForReserves, may be reverted below.
// Overflow in this calculation is possible but numGobblersEach would have to
// be so large that it would cause the loop in _batchMint to run out of gas quickly.
uint256 newNumMintedForReserves = numMintedForReserves += (numGobblersEach * 2);
// Ensure that after this mint gobblers minted to reserves won't comprise more than 20% of
// the sum of the supply of goo minted gobblers and the supply of gobblers minted to reserves.
if (newNumMintedForReserves > (numMintedFromGoo + newNumMintedForReserves) / 5) revert ReserveImbalance();
}
// Mint numGobblersEach gobblers to both the team and community reserve.
lastMintedGobblerId = _batchMint(team, numGobblersEach, currentNonLegendaryId);
lastMintedGobblerId = _batchMint(community, numGobblersEach, lastMintedGobblerId);
currentNonLegendaryId = uint128(lastMintedGobblerId); // Set currentNonLegendaryId.
emit ReservedGobblersMinted(msg.sender, lastMintedGobblerId, numGobblersEach);
}
/*//////////////////////////////////////////////////////////////
CONVENIENCE FUNCTIONS
//////////////////////////////////////////////////////////////*/
/// @notice Convenience function to get emissionMultiple for a gobbler.
/// @param gobblerId The gobbler to get emissionMultiple for.
function getGobblerEmissionMultiple(uint256 gobblerId) external view returns (uint256) {
return getGobblerData[gobblerId].emissionMultiple;
}
/// @notice Convenience function to get emissionMultiple for a user.
/// @param user The user to get emissionMultiple for.
function getUserEmissionMultiple(address user) external view returns (uint256) {
return getUserData[user].emissionMultiple;
}
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
function transferFrom(
address from,
address to,
uint256 id
) public override {
require(from == getGobblerData[id].owner, "WRONG_FROM");
require(to != address(0), "INVALID_RECIPIENT");
require(
msg.sender == from || isApprovedForAll[from][msg.sender] || msg.sender == getApproved[id],
"NOT_AUTHORIZED"
);
delete getApproved[id];
getGobblerData[id].owner = to;
unchecked {
uint32 emissionMultiple = getGobblerData[id].emissionMultiple; // Caching saves gas.
// We update their last balance before updating their emission multiple to avoid
// penalizing them by retroactively applying their new (lower) emission multiple.
getUserData[from].lastBalance = uint128(gooBalance(from));
getUserData[from].lastTimestamp = uint64(block.timestamp);
getUserData[from].emissionMultiple -= emissionMultiple;
getUserData[from].gobblersOwned -= 1;
// We update their last balance before updating their emission multiple to avoid
// overpaying them by retroactively applying their new (higher) emission multiple.
getUserData[to].lastBalance = uint128(gooBalance(to));
getUserData[to].lastTimestamp = uint64(block.timestamp);
getUserData[to].emissionMultiple += emissionMultiple;
getUserData[to].gobblersOwned += 1;
}
emit Transfer(from, to, id);
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {unsafeWadDiv} from "solmate/utils/SignedWadMath.sol";
import {VRGDA} from "./VRGDA.sol";
import {LogisticVRGDA} from "./LogisticVRGDA.sol";
/// @title Logistic To Linear Variable Rate Gradual Dutch Auction
/// @author transmissions11 <[email protected]>
/// @author FrankieIsLost <[email protected]>
/// @notice VRGDA with a piecewise logistic and linear issuance curve.
abstract contract LogisticToLinearVRGDA is LogisticVRGDA {
/*//////////////////////////////////////////////////////////////
PRICING PARAMETERS
//////////////////////////////////////////////////////////////*/
/// @dev The number of tokens that must be sold for the switch to occur.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable soldBySwitch;
/// @dev The time soldBySwitch tokens were targeted to sell by.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable switchTime;
/// @dev The total number of tokens to target selling every full unit of time.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable perTimeUnit;
/// @notice Sets pricing parameters for the VRGDA.
/// @param _targetPrice The target price for a token if sold on pace, scaled by 1e18.
/// @param _priceDecayPercent The percent price decays per unit of time with no sales, scaled by 1e18.
/// @param _logisticAsymptote The asymptote (minus 1) of the pre-switch logistic curve, scaled by 1e18.
/// @param _timeScale The steepness of the pre-switch logistic curve, scaled by 1e18.
/// @param _soldBySwitch The number of tokens that must be sold for the switch to occur.
/// @param _switchTime The time soldBySwitch tokens were targeted to sell by, scaled by 1e18.
/// @param _perTimeUnit The number of tokens to target selling in 1 full unit of time, scaled by 1e18.
constructor(
int256 _targetPrice,
int256 _priceDecayPercent,
int256 _logisticAsymptote,
int256 _timeScale,
int256 _soldBySwitch,
int256 _switchTime,
int256 _perTimeUnit
) LogisticVRGDA(_targetPrice, _priceDecayPercent, _logisticAsymptote, _timeScale) {
soldBySwitch = _soldBySwitch;
switchTime = _switchTime;
perTimeUnit = _perTimeUnit;
}
/*//////////////////////////////////////////////////////////////
PRICING LOGIC
//////////////////////////////////////////////////////////////*/
/// @dev Given a number of tokens sold, return the target time that number of tokens should be sold by.
/// @param sold A number of tokens sold, scaled by 1e18, to get the corresponding target sale time for.
/// @return The target time the tokens should be sold by, scaled by 1e18, where the time is
/// relative, such that 0 means the tokens should be sold immediately when the VRGDA begins.
function getTargetSaleTime(int256 sold) public view virtual override returns (int256) {
// If we've not yet reached the number of sales required for the switch
// to occur, we'll continue using the standard logistic VRGDA schedule.
if (sold < soldBySwitch) return LogisticVRGDA.getTargetSaleTime(sold);
unchecked {
return unsafeWadDiv(sold - soldBySwitch, perTimeUnit) + switchTime;
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {wadLn, unsafeDiv, unsafeWadDiv} from "solmate/utils/SignedWadMath.sol";
import {VRGDA} from "./VRGDA.sol";
/// @title Logistic Variable Rate Gradual Dutch Auction
/// @author transmissions11 <[email protected]>
/// @author FrankieIsLost <[email protected]>
/// @notice VRGDA with a logistic issuance curve.
abstract contract LogisticVRGDA is VRGDA {
/*//////////////////////////////////////////////////////////////
PRICING PARAMETERS
//////////////////////////////////////////////////////////////*/
/// @dev The maximum number of tokens of tokens to sell + 1. We add
/// 1 because the logistic function will never fully reach its limit.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable logisticLimit;
/// @dev The maximum number of tokens of tokens to sell + 1 multiplied
/// by 2. We could compute it on the fly each time but this saves gas.
/// @dev Represented as a 36 decimal fixed point number.
int256 internal immutable logisticLimitDoubled;
/// @dev Time scale controls the steepness of the logistic curve,
/// which affects how quickly we will reach the curve's asymptote.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable timeScale;
/// @notice Sets pricing parameters for the VRGDA.
/// @param _targetPrice The target price for a token if sold on pace, scaled by 1e18.
/// @param _priceDecayPercent The percent price decays per unit of time with no sales, scaled by 1e18.
/// @param _maxSellable The maximum number of tokens to sell, scaled by 1e18.
/// @param _timeScale The steepness of the logistic curve, scaled by 1e18.
constructor(
int256 _targetPrice,
int256 _priceDecayPercent,
int256 _maxSellable,
int256 _timeScale
) VRGDA(_targetPrice, _priceDecayPercent) {
// Add 1 wad to make the limit inclusive of _maxSellable.
logisticLimit = _maxSellable + 1e18;
// Scale by 2e18 to both double it and give it 36 decimals.
logisticLimitDoubled = logisticLimit * 2e18;
timeScale = _timeScale;
}
/*//////////////////////////////////////////////////////////////
PRICING LOGIC
//////////////////////////////////////////////////////////////*/
/// @dev Given a number of tokens sold, return the target time that number of tokens should be sold by.
/// @param sold A number of tokens sold, scaled by 1e18, to get the corresponding target sale time for.
/// @return The target time the tokens should be sold by, scaled by 1e18, where the time is
/// relative, such that 0 means the tokens should be sold immediately when the VRGDA begins.
function getTargetSaleTime(int256 sold) public view virtual override returns (int256) {
unchecked {
return -unsafeWadDiv(wadLn(unsafeDiv(logisticLimitDoubled, sold + logisticLimit) - 1e18), timeScale);
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {wadExp, wadLn, wadMul, unsafeWadMul, toWadUnsafe} from "solmate/utils/SignedWadMath.sol";
/// @title Variable Rate Gradual Dutch Auction
/// @author transmissions11 <[email protected]>
/// @author FrankieIsLost <[email protected]>
/// @notice Sell tokens roughly according to an issuance schedule.
abstract contract VRGDA {
/*//////////////////////////////////////////////////////////////
VRGDA PARAMETERS
//////////////////////////////////////////////////////////////*/
/// @notice Target price for a token, to be scaled according to sales pace.
/// @dev Represented as an 18 decimal fixed point number.
int256 public immutable targetPrice;
/// @dev Precomputed constant that allows us to rewrite a pow() as an exp().
/// @dev Represented as an 18 decimal fixed point number.
int256 internal immutable decayConstant;
/// @notice Sets target price and per time unit price decay for the VRGDA.
/// @param _targetPrice The target price for a token if sold on pace, scaled by 1e18.
/// @param _priceDecayPercent The percent price decays per unit of time with no sales, scaled by 1e18.
constructor(int256 _targetPrice, int256 _priceDecayPercent) {
targetPrice = _targetPrice;
decayConstant = wadLn(1e18 - _priceDecayPercent);
// The decay constant must be negative for VRGDAs to work.
require(decayConstant < 0, "NON_NEGATIVE_DECAY_CONSTANT");
}
/*//////////////////////////////////////////////////////////////
PRICING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Calculate the price of a token according to the VRGDA formula.
/// @param timeSinceStart Time passed since the VRGDA began, scaled by 1e18.
/// @param sold The total number of tokens that have been sold so far.
/// @return The price of a token according to VRGDA, scaled by 1e18.
function getVRGDAPrice(int256 timeSinceStart, uint256 sold) public view virtual returns (uint256) {
unchecked {
// prettier-ignore
return uint256(wadMul(targetPrice, wadExp(unsafeWadMul(decayConstant,
// Theoretically calling toWadUnsafe with sold can silently overflow but under
// any reasonable circumstance it will never be large enough. We use sold + 1 as
// the VRGDA formula's n param represents the nth token and sold is the n-1th token.
timeSinceStart - getTargetSaleTime(toWadUnsafe(sold + 1))
))));
}
}
/// @dev Given a number of tokens sold, return the target time that number of tokens should be sold by.
/// @param sold A number of tokens sold, scaled by 1e18, to get the corresponding target sale time for.
/// @return The target time the tokens should be sold by, scaled by 1e18, where the time is
/// relative, such that 0 means the tokens should be sold immediately when the VRGDA begins.
function getTargetSaleTime(int256 sold) public view virtual returns (int256);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {FixedPointMathLib} from "solmate/utils/FixedPointMathLib.sol";
/// @title GOO (Gradual Ownership Optimization) Issuance
/// @author transmissions11 <[email protected]>
/// @author FrankieIsLost <[email protected]>
/// @notice Implementation of the GOO Issuance mechanism.
library LibGOO {
using FixedPointMathLib for uint256;
/// @notice Compute goo balance based on emission multiple, last balance, and time elapsed.
/// @param emissionMultiple The multiple on emissions to consider when computing the balance.
/// @param lastBalanceWad The last checkpointed balance to apply the emission multiple over time to, scaled by 1e18.
/// @param timeElapsedWad The time elapsed since the last checkpoint, scaled by 1e18.
function computeGOOBalance(
uint256 emissionMultiple,
uint256 lastBalanceWad,
uint256 timeElapsedWad
) internal pure returns (uint256) {
unchecked {
// We use wad math here because timeElapsedWad is, as the name indicates, a wad.
uint256 timeElapsedSquaredWad = timeElapsedWad.mulWadDown(timeElapsedWad);
// prettier-ignore
return lastBalanceWad + // The last recorded balance.
// Don't need to do wad multiplication since we're
// multiplying by a plain integer with no decimals.
// Shift right by 2 is equivalent to division by 4.
((emissionMultiple * timeElapsedSquaredWad) >> 2) +
timeElapsedWad.mulWadDown( // Terms are wads, so must mulWad.
// No wad multiplication for emissionMultiple * lastBalance
// because emissionMultiple is a plain integer with no decimals.
// We multiply the sqrt's radicand by 1e18 because it expects ints.
(emissionMultiple * lastBalanceWad * 1e18).sqrt()
);
}
}
}// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event OwnershipTransferred(address indexed user, address indexed newOwner);
/*//////////////////////////////////////////////////////////////
OWNERSHIP STORAGE
//////////////////////////////////////////////////////////////*/
address public owner;
modifier onlyOwner() virtual {
require(msg.sender == owner, "UNAUTHORIZED");
_;
}
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(address _owner) {
owner = _owner;
emit OwnershipTransferred(address(0), _owner);
}
/*//////////////////////////////////////////////////////////////
OWNERSHIP LOGIC
//////////////////////////////////////////////////////////////*/
function transferOwnership(address newOwner) public virtual onlyOwner {
owner = newOwner;
emit OwnershipTransferred(msg.sender, newOwner);
}
}// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Minimalist and gas efficient standard ERC1155 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155 {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event TransferSingle(
address indexed operator,
address indexed from,
address indexed to,
uint256 id,
uint256 amount
);
event TransferBatch(
address indexed operator,
address indexed from,
address indexed to,
uint256[] ids,
uint256[] amounts
);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
event URI(string value, uint256 indexed id);
/*//////////////////////////////////////////////////////////////
ERC1155 STORAGE
//////////////////////////////////////////////////////////////*/
mapping(address => mapping(uint256 => uint256)) public balanceOf;
mapping(address => mapping(address => bool)) public isApprovedForAll;
/*//////////////////////////////////////////////////////////////
METADATA LOGIC
//////////////////////////////////////////////////////////////*/
function uri(uint256 id) public view virtual returns (string memory);
/*//////////////////////////////////////////////////////////////
ERC1155 LOGIC
//////////////////////////////////////////////////////////////*/
function setApprovalForAll(address operator, bool approved) public virtual {
isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
uint256 amount,
bytes calldata data
) public virtual {
require(msg.sender == from || isApprovedForAll[from][msg.sender], "NOT_AUTHORIZED");
balanceOf[from][id] -= amount;
balanceOf[to][id] += amount;
emit TransferSingle(msg.sender, from, to, id, amount);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(msg.sender, from, id, amount, data) ==
ERC1155TokenReceiver.onERC1155Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeBatchTransferFrom(
address from,
address to,
uint256[] calldata ids,
uint256[] calldata amounts,
bytes calldata data
) public virtual {
require(ids.length == amounts.length, "LENGTH_MISMATCH");
require(msg.sender == from || isApprovedForAll[from][msg.sender], "NOT_AUTHORIZED");
// Storing these outside the loop saves ~15 gas per iteration.
uint256 id;
uint256 amount;
for (uint256 i = 0; i < ids.length; ) {
id = ids[i];
amount = amounts[i];
balanceOf[from][id] -= amount;
balanceOf[to][id] += amount;
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
++i;
}
}
emit TransferBatch(msg.sender, from, to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, from, ids, amounts, data) ==
ERC1155TokenReceiver.onERC1155BatchReceived.selector,
"UNSAFE_RECIPIENT"
);
}
function balanceOfBatch(address[] calldata owners, uint256[] calldata ids)
public
view
virtual
returns (uint256[] memory balances)
{
require(owners.length == ids.length, "LENGTH_MISMATCH");
balances = new uint256[](owners.length);
// Unchecked because the only math done is incrementing
// the array index counter which cannot possibly overflow.
unchecked {
for (uint256 i = 0; i < owners.length; ++i) {
balances[i] = balanceOf[owners[i]][ids[i]];
}
}
}
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0xd9b67a26 || // ERC165 Interface ID for ERC1155
interfaceId == 0x0e89341c; // ERC165 Interface ID for ERC1155MetadataURI
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(
address to,
uint256 id,
uint256 amount,
bytes memory data
) internal virtual {
balanceOf[to][id] += amount;
emit TransferSingle(msg.sender, address(0), to, id, amount);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155Received(msg.sender, address(0), id, amount, data) ==
ERC1155TokenReceiver.onERC1155Received.selector,
"UNSAFE_RECIPIENT"
);
}
function _batchMint(
address to,
uint256[] memory ids,
uint256[] memory amounts,
bytes memory data
) internal virtual {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, "LENGTH_MISMATCH");
for (uint256 i = 0; i < idsLength; ) {
balanceOf[to][ids[i]] += amounts[i];
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
++i;
}
}
emit TransferBatch(msg.sender, address(0), to, ids, amounts);
require(
to.code.length == 0
? to != address(0)
: ERC1155TokenReceiver(to).onERC1155BatchReceived(msg.sender, address(0), ids, amounts, data) ==
ERC1155TokenReceiver.onERC1155BatchReceived.selector,
"UNSAFE_RECIPIENT"
);
}
function _batchBurn(
address from,
uint256[] memory ids,
uint256[] memory amounts
) internal virtual {
uint256 idsLength = ids.length; // Saves MLOADs.
require(idsLength == amounts.length, "LENGTH_MISMATCH");
for (uint256 i = 0; i < idsLength; ) {
balanceOf[from][ids[i]] -= amounts[i];
// An array can't have a total length
// larger than the max uint256 value.
unchecked {
++i;
}
}
emit TransferBatch(msg.sender, from, address(0), ids, amounts);
}
function _burn(
address from,
uint256 id,
uint256 amount
) internal virtual {
balanceOf[from][id] -= amount;
emit TransferSingle(msg.sender, from, address(0), id, amount);
}
}
/// @notice A generic interface for a contract which properly accepts ERC1155 tokens.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC1155.sol)
abstract contract ERC1155TokenReceiver {
function onERC1155Received(
address,
address,
uint256,
uint256,
bytes calldata
) external virtual returns (bytes4) {
return ERC1155TokenReceiver.onERC1155Received.selector;
}
function onERC1155BatchReceived(
address,
address,
uint256[] calldata,
uint256[] calldata,
bytes calldata
) external virtual returns (bytes4) {
return ERC1155TokenReceiver.onERC1155BatchReceived.selector;
}
}// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
/*//////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
uint8 public immutable decimals;
/*//////////////////////////////////////////////////////////////
ERC20 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
/*//////////////////////////////////////////////////////////////
EIP-2612 STORAGE
//////////////////////////////////////////////////////////////*/
uint256 internal immutable INITIAL_CHAIN_ID;
bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;
mapping(address => uint256) public nonces;
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(
string memory _name,
string memory _symbol,
uint8 _decimals
) {
name = _name;
symbol = _symbol;
decimals = _decimals;
INITIAL_CHAIN_ID = block.chainid;
INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
}
/*//////////////////////////////////////////////////////////////
ERC20 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 amount) public virtual returns (bool) {
allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transfer(address to, uint256 amount) public virtual returns (bool) {
balanceOf[msg.sender] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(msg.sender, to, amount);
return true;
}
function transferFrom(
address from,
address to,
uint256 amount
) public virtual returns (bool) {
uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.
if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;
balanceOf[from] -= amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(from, to, amount);
return true;
}
/*//////////////////////////////////////////////////////////////
EIP-2612 LOGIC
//////////////////////////////////////////////////////////////*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");
// Unchecked because the only math done is incrementing
// the owner's nonce which cannot realistically overflow.
unchecked {
address recoveredAddress = ecrecover(
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR(),
keccak256(
abi.encode(
keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
),
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
),
v,
r,
s
);
require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");
allowance[recoveredAddress][spender] = value;
}
emit Approval(owner, spender, value);
}
function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
}
function computeDomainSeparator() internal view virtual returns (bytes32) {
return
keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256("1"),
block.chainid,
address(this)
)
);
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 amount) internal virtual {
totalSupply += amount;
// Cannot overflow because the sum of all user
// balances can't exceed the max uint256 value.
unchecked {
balanceOf[to] += amount;
}
emit Transfer(address(0), to, amount);
}
function _burn(address from, uint256 amount) internal virtual {
balanceOf[from] -= amount;
// Cannot underflow because a user's balance
// will never be larger than the total supply.
unchecked {
totalSupply -= amount;
}
emit Transfer(from, address(0), amount);
}
}// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721 {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 indexed id);
event Approval(address indexed owner, address indexed spender, uint256 indexed id);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/*//////////////////////////////////////////////////////////////
METADATA STORAGE/LOGIC
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
function tokenURI(uint256 id) public view virtual returns (string memory);
/*//////////////////////////////////////////////////////////////
ERC721 BALANCE/OWNER STORAGE
//////////////////////////////////////////////////////////////*/
mapping(uint256 => address) internal _ownerOf;
mapping(address => uint256) internal _balanceOf;
function ownerOf(uint256 id) public view virtual returns (address owner) {
require((owner = _ownerOf[id]) != address(0), "NOT_MINTED");
}
function balanceOf(address owner) public view virtual returns (uint256) {
require(owner != address(0), "ZERO_ADDRESS");
return _balanceOf[owner];
}
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
mapping(uint256 => address) public getApproved;
mapping(address => mapping(address => bool)) public isApprovedForAll;
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(string memory _name, string memory _symbol) {
name = _name;
symbol = _symbol;
}
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 id) public virtual {
address owner = _ownerOf[id];
require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");
getApproved[id] = spender;
emit Approval(owner, spender, id);
}
function setApprovalForAll(address operator, bool approved) public virtual {
isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function transferFrom(
address from,
address to,
uint256 id
) public virtual {
require(from == _ownerOf[id], "WRONG_FROM");
require(to != address(0), "INVALID_RECIPIENT");
require(
msg.sender == from || isApprovedForAll[from][msg.sender] || msg.sender == getApproved[id],
"NOT_AUTHORIZED"
);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
unchecked {
_balanceOf[from]--;
_balanceOf[to]++;
}
_ownerOf[id] = to;
delete getApproved[id];
emit Transfer(from, to, id);
}
function safeTransferFrom(
address from,
address to,
uint256 id
) public virtual {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
bytes calldata data
) public virtual {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 id) internal virtual {
require(to != address(0), "INVALID_RECIPIENT");
require(_ownerOf[id] == address(0), "ALREADY_MINTED");
// Counter overflow is incredibly unrealistic.
unchecked {
_balanceOf[to]++;
}
_ownerOf[id] = to;
emit Transfer(address(0), to, id);
}
function _burn(uint256 id) internal virtual {
address owner = _ownerOf[id];
require(owner != address(0), "NOT_MINTED");
// Ownership check above ensures no underflow.
unchecked {
_balanceOf[owner]--;
}
delete _ownerOf[id];
delete getApproved[id];
emit Transfer(owner, address(0), id);
}
/*//////////////////////////////////////////////////////////////
INTERNAL SAFE MINT LOGIC
//////////////////////////////////////////////////////////////*/
function _safeMint(address to, uint256 id) internal virtual {
_mint(to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function _safeMint(
address to,
uint256 id,
bytes memory data
) internal virtual {
_mint(to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
}
/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721TokenReceiver {
function onERC721Received(
address,
address,
uint256,
bytes calldata
) external virtual returns (bytes4) {
return ERC721TokenReceiver.onERC721Received.selector;
}
}// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
/// @notice Arithmetic library with operations for fixed-point numbers.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/FixedPointMathLib.sol)
/// @author Inspired by USM (https://github.com/usmfum/USM/blob/master/contracts/WadMath.sol)
library FixedPointMathLib {
/*//////////////////////////////////////////////////////////////
SIMPLIFIED FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
uint256 internal constant MAX_UINT256 = 2**256 - 1;
uint256 internal constant WAD = 1e18; // The scalar of ETH and most ERC20s.
function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
}
function mulWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, y, WAD); // Equivalent to (x * y) / WAD rounded up.
}
function divWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivDown(x, WAD, y); // Equivalent to (x * WAD) / y rounded down.
}
function divWadUp(uint256 x, uint256 y) internal pure returns (uint256) {
return mulDivUp(x, WAD, y); // Equivalent to (x * WAD) / y rounded up.
}
/*//////////////////////////////////////////////////////////////
LOW LEVEL FIXED POINT OPERATIONS
//////////////////////////////////////////////////////////////*/
function mulDivDown(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
// Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
revert(0, 0)
}
// Divide x * y by the denominator.
z := div(mul(x, y), denominator)
}
}
function mulDivUp(
uint256 x,
uint256 y,
uint256 denominator
) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
// Equivalent to require(denominator != 0 && (y == 0 || x <= type(uint256).max / y))
if iszero(mul(denominator, iszero(mul(y, gt(x, div(MAX_UINT256, y)))))) {
revert(0, 0)
}
// If x * y modulo the denominator is strictly greater than 0,
// 1 is added to round up the division of x * y by the denominator.
z := add(gt(mod(mul(x, y), denominator), 0), div(mul(x, y), denominator))
}
}
function rpow(
uint256 x,
uint256 n,
uint256 scalar
) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
switch x
case 0 {
switch n
case 0 {
// 0 ** 0 = 1
z := scalar
}
default {
// 0 ** n = 0
z := 0
}
}
default {
switch mod(n, 2)
case 0 {
// If n is even, store scalar in z for now.
z := scalar
}
default {
// If n is odd, store x in z for now.
z := x
}
// Shifting right by 1 is like dividing by 2.
let half := shr(1, scalar)
for {
// Shift n right by 1 before looping to halve it.
n := shr(1, n)
} n {
// Shift n right by 1 each iteration to halve it.
n := shr(1, n)
} {
// Revert immediately if x ** 2 would overflow.
// Equivalent to iszero(eq(div(xx, x), x)) here.
if shr(128, x) {
revert(0, 0)
}
// Store x squared.
let xx := mul(x, x)
// Round to the nearest number.
let xxRound := add(xx, half)
// Revert if xx + half overflowed.
if lt(xxRound, xx) {
revert(0, 0)
}
// Set x to scaled xxRound.
x := div(xxRound, scalar)
// If n is even:
if mod(n, 2) {
// Compute z * x.
let zx := mul(z, x)
// If z * x overflowed:
if iszero(eq(div(zx, x), z)) {
// Revert if x is non-zero.
if iszero(iszero(x)) {
revert(0, 0)
}
}
// Round to the nearest number.
let zxRound := add(zx, half)
// Revert if zx + half overflowed.
if lt(zxRound, zx) {
revert(0, 0)
}
// Return properly scaled zxRound.
z := div(zxRound, scalar)
}
}
}
}
}
/*//////////////////////////////////////////////////////////////
GENERAL NUMBER UTILITIES
//////////////////////////////////////////////////////////////*/
function sqrt(uint256 x) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
let y := x // We start y at x, which will help us make our initial estimate.
z := 181 // The "correct" value is 1, but this saves a multiplication later.
// This segment is to get a reasonable initial estimate for the Babylonian method. With a bad
// start, the correct # of bits increases ~linearly each iteration instead of ~quadratically.
// We check y >= 2^(k + 8) but shift right by k bits
// each branch to ensure that if x >= 256, then y >= 256.
if iszero(lt(y, 0x10000000000000000000000000000000000)) {
y := shr(128, y)
z := shl(64, z)
}
if iszero(lt(y, 0x1000000000000000000)) {
y := shr(64, y)
z := shl(32, z)
}
if iszero(lt(y, 0x10000000000)) {
y := shr(32, y)
z := shl(16, z)
}
if iszero(lt(y, 0x1000000)) {
y := shr(16, y)
z := shl(8, z)
}
// Goal was to get z*z*y within a small factor of x. More iterations could
// get y in a tighter range. Currently, we will have y in [256, 256*2^16).
// We ensured y >= 256 so that the relative difference between y and y+1 is small.
// That's not possible if x < 256 but we can just verify those cases exhaustively.
// Now, z*z*y <= x < z*z*(y+1), and y <= 2^(16+8), and either y >= 256, or x < 256.
// Correctness can be checked exhaustively for x < 256, so we assume y >= 256.
// Then z*sqrt(y) is within sqrt(257)/sqrt(256) of sqrt(x), or about 20bps.
// For s in the range [1/256, 256], the estimate f(s) = (181/1024) * (s+1) is in the range
// (1/2.84 * sqrt(s), 2.84 * sqrt(s)), with largest error when s = 1 and when s = 256 or 1/256.
// Since y is in [256, 256*2^16), let a = y/65536, so that a is in [1/256, 256). Then we can estimate
// sqrt(y) using sqrt(65536) * 181/1024 * (a + 1) = 181/4 * (y + 65536)/65536 = 181 * (y + 65536)/2^18.
// There is no overflow risk here since y < 2^136 after the first branch above.
z := shr(18, mul(z, add(y, 65536))) // A mul() is saved from starting z at 181.
// Given the worst case multiplicative error of 2.84 above, 7 iterations should be enough.
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
z := shr(1, add(z, div(x, z)))
// If x+1 is a perfect square, the Babylonian method cycles between
// floor(sqrt(x)) and ceil(sqrt(x)). This statement ensures we return floor.
// See: https://en.wikipedia.org/wiki/Integer_square_root#Using_only_integer_division
// Since the ceil is rare, we save gas on the assignment and repeat division in the rare case.
// If you don't care whether the floor or ceil square root is returned, you can remove this statement.
z := sub(z, lt(div(x, z), z))
}
}
function unsafeMod(uint256 x, uint256 y) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
// Mod x by y. Note this will return
// 0 instead of reverting if y is zero.
z := mod(x, y)
}
}
function unsafeDiv(uint256 x, uint256 y) internal pure returns (uint256 r) {
/// @solidity memory-safe-assembly
assembly {
// Divide x by y. Note this will return
// 0 instead of reverting if y is zero.
r := div(x, y)
}
}
function unsafeDivUp(uint256 x, uint256 y) internal pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
// Add 1 to x * y if x % y > 0. Note this will
// return 0 instead of reverting if y is zero.
z := add(gt(mod(x, y), 0), div(x, y))
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @notice Efficient library for creating string representations of integers.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol)
/// @author Modified from Solady (https://github.com/Vectorized/solady/blob/main/src/utils/LibString.sol)
library LibString {
function toString(uint256 value) internal pure returns (string memory str) {
/// @solidity memory-safe-assembly
assembly {
// The maximum value of a uint256 contains 78 digits (1 byte per digit), but we allocate 160 bytes
// to keep the free memory pointer word aligned. We'll need 1 word for the length, 1 word for the
// trailing zeros padding, and 3 other words for a max of 78 digits. In total: 5 * 32 = 160 bytes.
let newFreeMemoryPointer := add(mload(0x40), 160)
// Update the free memory pointer to avoid overriding our string.
mstore(0x40, newFreeMemoryPointer)
// Assign str to the end of the zone of newly allocated memory.
str := sub(newFreeMemoryPointer, 32)
// Clean the last word of memory it may not be overwritten.
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 {} {
// Move the pointer 1 byte to the left.
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 }
}
// Compute and cache the final total length of the string.
let length := sub(end, str)
// Move the pointer 32 bytes leftwards to make room for the length.
str := sub(str, 32)
// Store the string's length at the start of memory allocated for our string.
mstore(str, length)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @notice Gas optimized merkle proof verification library.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/MerkleProofLib.sol)
/// @author Modified from Solady (https://github.com/Vectorized/solady/blob/main/src/utils/MerkleProofLib.sol)
library MerkleProofLib {
function verify(
bytes32[] calldata proof,
bytes32 root,
bytes32 leaf
) internal pure returns (bool isValid) {
/// @solidity memory-safe-assembly
assembly {
if proof.length {
// Left shifting by 5 is like multiplying by 32.
let end := add(proof.offset, shl(5, proof.length))
// Initialize offset to the offset of the proof in calldata.
let offset := proof.offset
// Iterate over proof elements to compute root hash.
// prettier-ignore
for {} 1 {} {
// Slot where the leaf should be put in scratch space. If
// leaf > calldataload(offset): slot 32, otherwise: slot 0.
let leafSlot := shl(5, gt(leaf, calldataload(offset)))
// Store elements to hash contiguously in scratch space.
// The xor puts calldataload(offset) in whichever slot leaf
// is not occupying, so 0 if leafSlot is 32, and 32 otherwise.
mstore(leafSlot, leaf)
mstore(xor(leafSlot, 32), calldataload(offset))
// Reuse leaf to store the hash to reduce stack operations.
leaf := keccak256(0, 64) // Hash both slots of scratch space.
offset := add(offset, 32) // Shift 1 word per cycle.
// prettier-ignore
if iszero(lt(offset, end)) { break }
}
}
isValid := eq(leaf, root) // The proof is valid if the roots match.
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
/// @notice Signed 18 decimal fixed point (wad) arithmetic library.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SignedWadMath.sol)
/// @author Modified from Remco Bloemen (https://xn--2-umb.com/22/exp-ln/index.html)
/// @dev Will not revert on overflow, only use where overflow is not possible.
function toWadUnsafe(uint256 x) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Multiply x by 1e18.
r := mul(x, 1000000000000000000)
}
}
/// @dev Takes an integer amount of seconds and converts it to a wad amount of days.
/// @dev Will not revert on overflow, only use where overflow is not possible.
/// @dev Not meant for negative second amounts, it assumes x is positive.
function toDaysWadUnsafe(uint256 x) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Multiply x by 1e18 and then divide it by 86400.
r := div(mul(x, 1000000000000000000), 86400)
}
}
/// @dev Takes a wad amount of days and converts it to an integer amount of seconds.
/// @dev Will not revert on overflow, only use where overflow is not possible.
/// @dev Not meant for negative day amounts, it assumes x is positive.
function fromDaysWadUnsafe(int256 x) pure returns (uint256 r) {
/// @solidity memory-safe-assembly
assembly {
// Multiply x by 86400 and then divide it by 1e18.
r := div(mul(x, 86400), 1000000000000000000)
}
}
/// @dev Will not revert on overflow, only use where overflow is not possible.
function unsafeWadMul(int256 x, int256 y) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Multiply x by y and divide by 1e18.
r := sdiv(mul(x, y), 1000000000000000000)
}
}
/// @dev Will return 0 instead of reverting if y is zero and will
/// not revert on overflow, only use where overflow is not possible.
function unsafeWadDiv(int256 x, int256 y) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Multiply x by 1e18 and divide it by y.
r := sdiv(mul(x, 1000000000000000000), y)
}
}
function wadMul(int256 x, int256 y) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Store x * y in r for now.
r := mul(x, y)
// Equivalent to require(x == 0 || (x * y) / x == y)
if iszero(or(iszero(x), eq(sdiv(r, x), y))) {
revert(0, 0)
}
// Scale the result down by 1e18.
r := sdiv(r, 1000000000000000000)
}
}
function wadDiv(int256 x, int256 y) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Store x * 1e18 in r for now.
r := mul(x, 1000000000000000000)
// Equivalent to require(y != 0 && ((x * 1e18) / 1e18 == x))
if iszero(and(iszero(iszero(y)), eq(sdiv(r, 1000000000000000000), x))) {
revert(0, 0)
}
// Divide r by y.
r := sdiv(r, y)
}
}
function wadExp(int256 x) pure returns (int256 r) {
unchecked {
// When the result is < 0.5 we return zero. This happens when
// x <= floor(log(0.5e18) * 1e18) ~ -42e18
if (x <= -42139678854452767551) return 0;
// When the result is > (2**255 - 1) / 1e18 we can not represent it as an
// int. This happens when x >= floor(log((2**255 - 1) / 1e18) * 1e18) ~ 135.
if (x >= 135305999368893231589) revert("EXP_OVERFLOW");
// x is now in the range (-42, 136) * 1e18. Convert to (-42, 136) * 2**96
// for more intermediate precision and a binary basis. This base conversion
// is a multiplication by 1e18 / 2**96 = 5**18 / 2**78.
x = (x << 78) / 5**18;
// Reduce range of x to (-½ ln 2, ½ ln 2) * 2**96 by factoring out powers
// of two such that exp(x) = exp(x') * 2**k, where k is an integer.
// Solving this gives k = round(x / log(2)) and x' = x - k * log(2).
int256 k = ((x << 96) / 54916777467707473351141471128 + 2**95) >> 96;
x = x - k * 54916777467707473351141471128;
// k is in the range [-61, 195].
// Evaluate using a (6, 7)-term rational approximation.
// p is made monic, we'll multiply by a scale factor later.
int256 y = x + 1346386616545796478920950773328;
y = ((y * x) >> 96) + 57155421227552351082224309758442;
int256 p = y + x - 94201549194550492254356042504812;
p = ((p * y) >> 96) + 28719021644029726153956944680412240;
p = p * x + (4385272521454847904659076985693276 << 96);
// We leave p in 2**192 basis so we don't need to scale it back up for the division.
int256 q = x - 2855989394907223263936484059900;
q = ((q * x) >> 96) + 50020603652535783019961831881945;
q = ((q * x) >> 96) - 533845033583426703283633433725380;
q = ((q * x) >> 96) + 3604857256930695427073651918091429;
q = ((q * x) >> 96) - 14423608567350463180887372962807573;
q = ((q * x) >> 96) + 26449188498355588339934803723976023;
/// @solidity memory-safe-assembly
assembly {
// Div in assembly because solidity adds a zero check despite the unchecked.
// The q polynomial won't have zeros in the domain as all its roots are complex.
// No scaling is necessary because p is already 2**96 too large.
r := sdiv(p, q)
}
// r should be in the range (0.09, 0.25) * 2**96.
// We now need to multiply r by:
// * the scale factor s = ~6.031367120.
// * the 2**k factor from the range reduction.
// * the 1e18 / 2**96 factor for base conversion.
// We do this all at once, with an intermediate result in 2**213
// basis, so the final right shift is always by a positive amount.
r = int256((uint256(r) * 3822833074963236453042738258902158003155416615667) >> uint256(195 - k));
}
}
function wadLn(int256 x) pure returns (int256 r) {
unchecked {
require(x > 0, "UNDEFINED");
// We want to convert x from 10**18 fixed point to 2**96 fixed point.
// We do this by multiplying by 2**96 / 10**18. But since
// ln(x * C) = ln(x) + ln(C), we can simply do nothing here
// and add ln(2**96 / 10**18) at the end.
/// @solidity memory-safe-assembly
assembly {
r := shl(7, lt(0xffffffffffffffffffffffffffffffff, x))
r := or(r, shl(6, lt(0xffffffffffffffff, shr(r, x))))
r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
r := or(r, shl(4, lt(0xffff, shr(r, x))))
r := or(r, shl(3, lt(0xff, shr(r, x))))
r := or(r, shl(2, lt(0xf, shr(r, x))))
r := or(r, shl(1, lt(0x3, shr(r, x))))
r := or(r, lt(0x1, shr(r, x)))
}
// Reduce range of x to (1, 2) * 2**96
// ln(2^k * x) = k * ln(2) + ln(x)
int256 k = r - 96;
x <<= uint256(159 - k);
x = int256(uint256(x) >> 159);
// Evaluate using a (8, 8)-term rational approximation.
// p is made monic, we will multiply by a scale factor later.
int256 p = x + 3273285459638523848632254066296;
p = ((p * x) >> 96) + 24828157081833163892658089445524;
p = ((p * x) >> 96) + 43456485725739037958740375743393;
p = ((p * x) >> 96) - 11111509109440967052023855526967;
p = ((p * x) >> 96) - 45023709667254063763336534515857;
p = ((p * x) >> 96) - 14706773417378608786704636184526;
p = p * x - (795164235651350426258249787498 << 96);
// We leave p in 2**192 basis so we don't need to scale it back up for the division.
// q is monic by convention.
int256 q = x + 5573035233440673466300451813936;
q = ((q * x) >> 96) + 71694874799317883764090561454958;
q = ((q * x) >> 96) + 283447036172924575727196451306956;
q = ((q * x) >> 96) + 401686690394027663651624208769553;
q = ((q * x) >> 96) + 204048457590392012362485061816622;
q = ((q * x) >> 96) + 31853899698501571402653359427138;
q = ((q * x) >> 96) + 909429971244387300277376558375;
/// @solidity memory-safe-assembly
assembly {
// Div in assembly because solidity adds a zero check despite the unchecked.
// The q polynomial is known not to have zeros in the domain.
// No scaling required because p is already 2**96 too large.
r := sdiv(p, q)
}
// r is in the range (0, 0.125) * 2**96
// Finalization, we need to:
// * multiply by the scale factor s = 5.549…
// * add ln(2**96 / 10**18)
// * add k * ln(2)
// * multiply by 10**18 / 2**96 = 5**18 >> 78
// mul s * 5e18 * 2**96, base is now 5**18 * 2**192
r *= 1677202110996718588342820967067443963516166;
// add ln(2) * k * 5e18 * 2**192
r += 16597577552685614221487285958193947469193820559219878177908093499208371 * k;
// add ln(2**96 / 10**18) * 5e18 * 2**192
r += 600920179829731861736702779321621459595472258049074101567377883020018308;
// base conversion: mul 2**18 / 2**192
r >>= 174;
}
}
/// @dev Will return 0 instead of reverting if y is zero.
function unsafeDiv(int256 x, int256 y) pure returns (int256 r) {
/// @solidity memory-safe-assembly
assembly {
// Divide x by y.
r := sdiv(x, y)
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {ERC20} from "solmate/tokens/ERC20.sol";
/* %#/*********(&,
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/// @title Goo Token (GOO)
/// @author FrankieIsLost <[email protected]>
/// @author transmissions11 <[email protected]>
/// @notice Goo is the in-game token for ArtGobblers. It's a standard ERC20
/// token that can be burned and minted by the gobblers and pages contract.
contract Goo is ERC20("Goo", "GOO", 18) {
/*//////////////////////////////////////////////////////////////
ADDRESSES
//////////////////////////////////////////////////////////////*/
/// @notice The address of the Art Gobblers contract.
address public immutable artGobblers;
/// @notice The address of the Pages contract.
address public immutable pages;
/*//////////////////////////////////////////////////////////////
ERRORS
//////////////////////////////////////////////////////////////*/
error Unauthorized();
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Sets the addresses of relevant contracts.
/// @param _artGobblers Address of the ArtGobblers contract.
/// @param _pages Address of the Pages contract.
constructor(address _artGobblers, address _pages) {
artGobblers = _artGobblers;
pages = _pages;
}
/*//////////////////////////////////////////////////////////////
MINT/BURN LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Requires caller address to match user address.
modifier only(address user) {
if (msg.sender != user) revert Unauthorized();
_;
}
/// @notice Mint any amount of goo to a user. Can only be called by ArtGobblers.
/// @param to The address of the user to mint goo to.
/// @param amount The amount of goo to mint.
function mintForGobblers(address to, uint256 amount) external only(artGobblers) {
_mint(to, amount);
}
/// @notice Burn any amount of goo from a user. Can only be called by ArtGobblers.
/// @param from The address of the user to burn goo from.
/// @param amount The amount of goo to burn.
function burnForGobblers(address from, uint256 amount) external only(artGobblers) {
_burn(from, amount);
}
/// @notice Burn any amount of goo from a user. Can only be called by Pages.
/// @param from The address of the user to burn goo from.
/// @param amount The amount of goo to burn.
function burnForPages(address from, uint256 amount) external only(pages) {
_burn(from, amount);
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {LibString} from "solmate/utils/LibString.sol";
import {toDaysWadUnsafe} from "solmate/utils/SignedWadMath.sol";
import {LogisticToLinearVRGDA} from "VRGDAs/LogisticToLinearVRGDA.sol";
import {PagesERC721} from "./utils/token/PagesERC721.sol";
import {Goo} from "./Goo.sol";
import {ArtGobblers} from "./ArtGobblers.sol";
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/// @title Pages NFT
/// @author FrankieIsLost <[email protected]>
/// @author transmissions11 <[email protected]>
/// @notice Pages is an ERC721 that can hold custom art.
contract Pages is PagesERC721, LogisticToLinearVRGDA {
using LibString for uint256;
/*//////////////////////////////////////////////////////////////
ADDRESSES
//////////////////////////////////////////////////////////////*/
/// @notice The address of the goo ERC20 token contract.
Goo public immutable goo;
/// @notice The address which receives pages reserved for the community.
address public immutable community;
/*//////////////////////////////////////////////////////////////
URIS
//////////////////////////////////////////////////////////////*/
/// @notice Base URI for minted pages.
string public BASE_URI;
/*//////////////////////////////////////////////////////////////
VRGDA INPUT STATE
//////////////////////////////////////////////////////////////*/
/// @notice Timestamp for the start of the VRGDA mint.
uint256 public immutable mintStart;
/// @notice Id of the most recently minted page.
/// @dev Will be 0 if no pages have been minted yet.
uint128 public currentId;
/*//////////////////////////////////////////////////////////////
COMMUNITY PAGES STATE
//////////////////////////////////////////////////////////////*/
/// @notice The number of pages minted to the community reserve.
uint128 public numMintedForCommunity;
/*//////////////////////////////////////////////////////////////
PRICING CONSTANTS
//////////////////////////////////////////////////////////////*/
/// @dev The day the switch from a logistic to translated linear VRGDA is targeted to occur.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal constant SWITCH_DAY_WAD = 233e18;
/// @notice The minimum amount of pages that must be sold for the VRGDA issuance
/// schedule to switch from logistic to the "post switch" translated linear formula.
/// @dev Computed off-chain by plugging SWITCH_DAY_WAD into the uninverted pacing formula.
/// @dev Represented as an 18 decimal fixed point number.
int256 internal constant SOLD_BY_SWITCH_WAD = 8336.760939794622713006e18;
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event PagePurchased(address indexed user, uint256 indexed pageId, uint256 price);
event CommunityPagesMinted(address indexed user, uint256 lastMintedPageId, uint256 numPages);
/*//////////////////////////////////////////////////////////////
ERRORS
//////////////////////////////////////////////////////////////*/
error ReserveImbalance();
error PriceExceededMax(uint256 currentPrice);
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
/// @notice Sets VRGDA parameters, mint start, relevant addresses, and base URI.
/// @param _mintStart Timestamp for the start of the VRGDA mint.
/// @param _goo Address of the Goo contract.
/// @param _community Address of the community reserve.
/// @param _artGobblers Address of the ArtGobblers contract.
/// @param _baseUri Base URI for token metadata.
constructor(
// Mint config:
uint256 _mintStart,
// Addresses:
Goo _goo,
address _community,
ArtGobblers _artGobblers,
// URIs:
string memory _baseUri
)
PagesERC721(_artGobblers, "Pages", "PAGE")
LogisticToLinearVRGDA(
4.2069e18, // Target price.
0.31e18, // Price decay percent.
9000e18, // Logistic asymptote.
0.014e18, // Logistic time scale.
SOLD_BY_SWITCH_WAD, // Sold by switch.
SWITCH_DAY_WAD, // Target switch day.
9e18 // Pages to target per day.
)
{
mintStart = _mintStart;
goo = _goo;
community = _community;
BASE_URI = _baseUri;
}
/*//////////////////////////////////////////////////////////////
MINTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Mint a page with goo, burning the cost.
/// @param maxPrice Maximum price to pay to mint the page.
/// @param useVirtualBalance Whether the cost is paid from the
/// user's virtual goo balance, or from their ERC20 goo balance.
/// @return pageId The id of the page that was minted.
function mintFromGoo(uint256 maxPrice, bool useVirtualBalance) external returns (uint256 pageId) {
// Will revert if prior to mint start.
uint256 currentPrice = pagePrice();
// If the current price is above the user's specified max, revert.
if (currentPrice > maxPrice) revert PriceExceededMax(currentPrice);
// Decrement the user's goo balance by the current
// price, either from virtual balance or ERC20 balance.
useVirtualBalance
? artGobblers.burnGooForPages(msg.sender, currentPrice)
: goo.burnForPages(msg.sender, currentPrice);
unchecked {
emit PagePurchased(msg.sender, pageId = ++currentId, currentPrice);
_mint(msg.sender, pageId);
}
}
/// @notice Calculate the mint cost of a page.
/// @dev If the number of sales is below a pre-defined threshold, we use the
/// VRGDA pricing algorithm, otherwise we use the post-switch pricing formula.
/// @dev Reverts due to underflow if minting hasn't started yet. Done to save gas.
function pagePrice() public view returns (uint256) {
// We need checked math here to cause overflow
// before minting has begun, preventing mints.
uint256 timeSinceStart = block.timestamp - mintStart;
unchecked {
// The number of pages minted for the community reserve
// should never exceed 10% of the total supply of pages.
return getVRGDAPrice(toDaysWadUnsafe(timeSinceStart), currentId - numMintedForCommunity);
}
}
/*//////////////////////////////////////////////////////////////
COMMUNITY PAGES MINTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Mint a number of pages to the community reserve.
/// @param numPages The number of pages to mint to the reserve.
/// @dev Pages minted to the reserve cannot comprise more than 10% of the sum of the
/// supply of goo minted pages and the supply of pages minted to the community reserve.
function mintCommunityPages(uint256 numPages) external returns (uint256 lastMintedPageId) {
unchecked {
// Optimistically increment numMintedForCommunity, may be reverted below.
// Overflow in this calculation is possible but numPages would have to be so
// large that it would cause the loop in _batchMint to run out of gas quickly.
uint256 newNumMintedForCommunity = numMintedForCommunity += uint128(numPages);
// Ensure that after this mint pages minted to the community reserve won't comprise more than
// 10% of the new total page supply. currentId is equivalent to the current total supply of pages.
if (newNumMintedForCommunity > ((lastMintedPageId = currentId) + numPages) / 10) revert ReserveImbalance();
// Mint the pages to the community reserve and update lastMintedPageId once minting is complete.
lastMintedPageId = _batchMint(community, numPages, lastMintedPageId);
currentId = uint128(lastMintedPageId); // Update currentId with the last minted page id.
emit CommunityPagesMinted(msg.sender, lastMintedPageId, numPages);
}
}
/*//////////////////////////////////////////////////////////////
TOKEN URI LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Returns a page's URI if it has been minted.
/// @param pageId The id of the page to get the URI for.
function tokenURI(uint256 pageId) public view virtual override returns (string memory) {
if (pageId == 0 || pageId > currentId) revert("NOT_MINTED");
return string.concat(BASE_URI, pageId.toString());
}
}// SPDX-License-Identifier: MIT pragma solidity >=0.8.0; /// @title Randomness Provider Interface. /// @author FrankieIsLost <[email protected]> /// @author transmissions11 <[email protected]> /// @notice Generic asynchronous randomness provider interface. interface RandProvider { /*////////////////////////////////////////////////////////////// EVENTS //////////////////////////////////////////////////////////////*/ event RandomBytesRequested(bytes32 requestId); event RandomBytesReturned(bytes32 requestId, uint256 randomness); /*////////////////////////////////////////////////////////////// FUNCTIONS //////////////////////////////////////////////////////////////*/ /// @dev Request random bytes from the randomness provider. function requestRandomBytes() external returns (bytes32 requestId); }
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
import {ERC721TokenReceiver} from "solmate/tokens/ERC721.sol";
/// @notice ERC721 implementation optimized for ArtGobblers by packing balanceOf/ownerOf with user/attribute data.
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract GobblersERC721 {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 indexed id);
event Approval(address indexed owner, address indexed spender, uint256 indexed id);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/*//////////////////////////////////////////////////////////////
METADATA STORAGE/LOGIC
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
function tokenURI(uint256 id) external view virtual returns (string memory);
/*//////////////////////////////////////////////////////////////
GOBBLERS/ERC721 STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice Struct holding gobbler data.
struct GobblerData {
// The current owner of the gobbler.
address owner;
// Index of token after shuffle.
uint64 idx;
// Multiple on goo issuance.
uint32 emissionMultiple;
}
/// @notice Maps gobbler ids to their data.
mapping(uint256 => GobblerData) public getGobblerData;
/// @notice Struct holding data relevant to each user's account.
struct UserData {
// The total number of gobblers currently owned by the user.
uint32 gobblersOwned;
// The sum of the multiples of all gobblers the user holds.
uint32 emissionMultiple;
// User's goo balance at time of last checkpointing.
uint128 lastBalance;
// Timestamp of the last goo balance checkpoint.
uint64 lastTimestamp;
}
/// @notice Maps user addresses to their account data.
mapping(address => UserData) public getUserData;
function ownerOf(uint256 id) external view returns (address owner) {
require((owner = getGobblerData[id].owner) != address(0), "NOT_MINTED");
}
function balanceOf(address owner) external view returns (uint256) {
require(owner != address(0), "ZERO_ADDRESS");
return getUserData[owner].gobblersOwned;
}
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
mapping(uint256 => address) public getApproved;
mapping(address => mapping(address => bool)) public isApprovedForAll;
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
constructor(string memory _name, string memory _symbol) {
name = _name;
symbol = _symbol;
}
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 id) external {
address owner = getGobblerData[id].owner;
require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");
getApproved[id] = spender;
emit Approval(owner, spender, id);
}
function setApprovalForAll(address operator, bool approved) external {
isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function transferFrom(
address from,
address to,
uint256 id
) public virtual;
function safeTransferFrom(
address from,
address to,
uint256 id
) external {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
bytes calldata data
) external {
transferFrom(from, to, id);
require(
to.code.length == 0 ||
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) external pure returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 id) internal {
// Does not check if the token was already minted or the recipient is address(0)
// because ArtGobblers.sol manages its ids in such a way that it ensures it won't
// double mint and will only mint to safe addresses or msg.sender who cannot be zero.
unchecked {
++getUserData[to].gobblersOwned;
}
getGobblerData[id].owner = to;
emit Transfer(address(0), to, id);
}
function _batchMint(
address to,
uint256 amount,
uint256 lastMintedId
) internal returns (uint256) {
// Doesn't check if the tokens were already minted or the recipient is address(0)
// because ArtGobblers.sol manages its ids in such a way that it ensures it won't
// double mint and will only mint to safe addresses or msg.sender who cannot be zero.
unchecked {
getUserData[to].gobblersOwned += uint32(amount);
for (uint256 i = 0; i < amount; ++i) {
getGobblerData[++lastMintedId].owner = to;
emit Transfer(address(0), to, lastMintedId);
}
}
return lastMintedId;
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import {ERC721TokenReceiver} from "solmate/tokens/ERC721.sol";
import {ArtGobblers} from "../../ArtGobblers.sol";
/// @notice ERC721 implementation optimized for Pages by pre-approving them to the ArtGobblers contract.
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract PagesERC721 {
/*//////////////////////////////////////////////////////////////
EVENTS
//////////////////////////////////////////////////////////////*/
event Transfer(address indexed from, address indexed to, uint256 indexed id);
event Approval(address indexed owner, address indexed spender, uint256 indexed id);
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/*//////////////////////////////////////////////////////////////
METADATA STORAGE/LOGIC
//////////////////////////////////////////////////////////////*/
string public name;
string public symbol;
function tokenURI(uint256 id) external view virtual returns (string memory);
/*//////////////////////////////////////////////////////////////
CONSTRUCTOR
//////////////////////////////////////////////////////////////*/
ArtGobblers public immutable artGobblers;
constructor(
ArtGobblers _artGobblers,
string memory _name,
string memory _symbol
) {
name = _name;
symbol = _symbol;
artGobblers = _artGobblers;
}
/*//////////////////////////////////////////////////////////////
ERC721 BALANCE/OWNER STORAGE
//////////////////////////////////////////////////////////////*/
mapping(uint256 => address) internal _ownerOf;
mapping(address => uint256) internal _balanceOf;
function ownerOf(uint256 id) external view returns (address owner) {
require((owner = _ownerOf[id]) != address(0), "NOT_MINTED");
}
function balanceOf(address owner) external view returns (uint256) {
require(owner != address(0), "ZERO_ADDRESS");
return _balanceOf[owner];
}
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
mapping(uint256 => address) public getApproved;
mapping(address => mapping(address => bool)) internal _isApprovedForAll;
function isApprovedForAll(address owner, address operator) public view returns (bool isApproved) {
if (operator == address(artGobblers)) return true; // Skip approvals for the ArtGobblers contract.
return _isApprovedForAll[owner][operator];
}
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
function approve(address spender, uint256 id) external {
address owner = _ownerOf[id];
require(msg.sender == owner || isApprovedForAll(owner, msg.sender), "NOT_AUTHORIZED");
getApproved[id] = spender;
emit Approval(owner, spender, id);
}
function setApprovalForAll(address operator, bool approved) external {
_isApprovedForAll[msg.sender][operator] = approved;
emit ApprovalForAll(msg.sender, operator, approved);
}
function transferFrom(
address from,
address to,
uint256 id
) public {
require(from == _ownerOf[id], "WRONG_FROM");
require(to != address(0), "INVALID_RECIPIENT");
require(
msg.sender == from || isApprovedForAll(from, msg.sender) || msg.sender == getApproved[id],
"NOT_AUTHORIZED"
);
// Underflow of the sender's balance is impossible because we check for
// ownership above and the recipient's balance can't realistically overflow.
unchecked {
_balanceOf[from]--;
_balanceOf[to]++;
}
_ownerOf[id] = to;
delete getApproved[id];
emit Transfer(from, to, id);
}
function safeTransferFrom(
address from,
address to,
uint256 id
) external {
transferFrom(from, to, id);
if (to.code.length != 0)
require(
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
function safeTransferFrom(
address from,
address to,
uint256 id,
bytes calldata data
) external {
transferFrom(from, to, id);
if (to.code.length != 0)
require(
ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
ERC721TokenReceiver.onERC721Received.selector,
"UNSAFE_RECIPIENT"
);
}
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
function supportsInterface(bytes4 interfaceId) external pure returns (bool) {
return
interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
}
/*//////////////////////////////////////////////////////////////
INTERNAL MINT LOGIC
//////////////////////////////////////////////////////////////*/
function _mint(address to, uint256 id) internal {
// Does not check the token has not been already minted
// or is being minted to address(0) because ids in Pages.sol
// are set using a monotonically increasing counter and only
// minted to safe addresses or msg.sender who cannot be zero.
// Counter overflow is incredibly unrealistic.
unchecked {
_balanceOf[to]++;
}
_ownerOf[id] = to;
emit Transfer(address(0), to, id);
}
function _batchMint(
address to,
uint256 amount,
uint256 lastMintedId
) internal returns (uint256) {
// Doesn't check if the tokens were already minted or the recipient is address(0)
// because Pages.sol manages its ids in a way that it ensures it won't double
// mint and will only mint to safe addresses or msg.sender who cannot be zero.
unchecked {
_balanceOf[to] += amount;
for (uint256 i = 0; i < amount; ++i) {
_ownerOf[++lastMintedId] = to;
emit Transfer(address(0), to, lastMintedId);
}
}
return lastMintedId;
}
}{
"remappings": [
"VRGDAs/=lib/VRGDAs/src/",
"chainlink/=lib/chainlink/contracts/src/",
"ds-test/=lib/ds-test/src/",
"forge-std/=lib/forge-std/src/",
"goo-issuance/=lib/goo-issuance/src/",
"solmate/=lib/solmate/src/"
],
"optimizer": {
"enabled": true,
"runs": 1000000
},
"metadata": {
"bytecodeHash": "none"
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"evmVersion": "london",
"libraries": {}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _merkleRoot (bytes32): 0xae49de097f1b61ff3ff428b660ddf98b6a8f64ed0f9b665709b13d3721b79405
Arg [1] : _mintStart (uint256): 1667247600
Arg [2] : _goo (address): 0x600000000a36F3cD48407e35eB7C5c910dc1f7a8
Arg [3] : _pages (address): 0x600Df00d3E42F885249902606383ecdcb65f2E02
Arg [4] : _team (address): 0x7F8790b58003986e4D7De118A440B05f26eC1D76
Arg [5] : _community (address): 0x9B61EBea95F8718CC4b146676ac0662B2A6e4FAb
Arg [6] : _randProvider (address): 0xe901e31B756a69ABE8Bb0FD37B5aa02a9173a4dC
Arg [7] : _baseUri (string): https://nfts.artgobblers.com/api/gobblers/
Arg [8] : _unrevealedUri (string): https://nfts.artgobblers.com/api/gobblers/unrevealed
Arg [9] : _provenanceHash (bytes32): 0x628f3ac523165f5cf33334938a6211f0065ce6dc20a095d5274c34df8504d6e4
-----Encoded View---------------
16 Constructor Arguments found :
Arg [0] : ae49de097f1b61ff3ff428b660ddf98b6a8f64ed0f9b665709b13d3721b79405
Arg [1] : 0000000000000000000000000000000000000000000000000000000063602df0
Arg [2] : 000000000000000000000000600000000a36f3cd48407e35eb7c5c910dc1f7a8
Arg [3] : 000000000000000000000000600df00d3e42f885249902606383ecdcb65f2e02
Arg [4] : 0000000000000000000000007f8790b58003986e4d7de118a440b05f26ec1d76
Arg [5] : 0000000000000000000000009b61ebea95f8718cc4b146676ac0662b2a6e4fab
Arg [6] : 000000000000000000000000e901e31b756a69abe8bb0fd37b5aa02a9173a4dc
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000140
Arg [8] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [9] : 628f3ac523165f5cf33334938a6211f0065ce6dc20a095d5274c34df8504d6e4
Arg [10] : 000000000000000000000000000000000000000000000000000000000000002a
Arg [11] : 68747470733a2f2f6e6674732e617274676f62626c6572732e636f6d2f617069
Arg [12] : 2f676f62626c6572732f00000000000000000000000000000000000000000000
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000034
Arg [14] : 68747470733a2f2f6e6674732e617274676f62626c6572732e636f6d2f617069
Arg [15] : 2f676f62626c6572732f756e72657665616c6564000000000000000000000000
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