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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
pragma solidity 0.8.18;
/**************************************************
* Interfaces
**************************************************/
interface IERC20 {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function approve(address, uint256) external;
function balanceOf(address) external view returns (uint256);
function allowance(address, address) external view returns (uint256);
function transfer(address, uint256) external returns (bool);
function transferFrom(
address,
address,
uint256
) external returns (bool);
}
interface IRouter {
struct route {
address from;
address to;
bool stable;
}
function swapExactTokensForTokens(
uint256,
uint256,
route[] calldata,
address,
uint256
) external returns (uint256[] memory);
}
interface IElmoSolid {
function redeem(
uint256,
address,
address
) external returns (uint256);
function balanceOf(address) external view returns (uint256);
function transferFrom(
address,
address,
uint256
) external returns (bool);
}
interface IVe {
struct LockedBalance {
int128 amount;
uint256 end;
}
function safeTransferFrom(
address,
address,
uint256
) external;
function locked(uint256) external view returns (LockedBalance memory);
function balanceOf(address) external view returns (uint256);
function tokenOfOwnerByIndex(address, uint256)
external
view
returns (uint256);
function attachments(uint256) external view returns (uint256);
function voted(uint256) external view returns (bool);
function isApprovedOrOwner(address, uint256) external view returns (bool);
}
interface IFactory {
function isPair(address) external returns (bool);
}
interface IMonoDepositor {
function withdraw(address, uint256) external;
}
interface IPair {
function burn(address) external returns (uint256, uint256);
function balanceOf(address) external returns (uint256);
function transfer(address, uint256) external returns (bool);
function transferFrom(
address,
address,
uint256
) external returns (bool);
function stable() external view returns (bool);
function token0() external view returns (address);
function token1() external view returns (address);
}
interface IMonoPair {
function pool() external view returns (address);
function balanceOf(address) external view returns (uint256);
function transferFrom(
address,
address,
uint256
) external;
}
/**************************************************
* Libraries
**************************************************/
library SafeCast {
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
require(value >= 0, "SafeCast: value must be positive");
return uint256(value);
}
}
/**************************************************
* Migration logic
**************************************************/
contract MonoMigrator {
/**************************************************
* Configuration
**************************************************/
IFactory constant factory =
IFactory(0x777de5Fe8117cAAA7B44f396E93a401Cf5c9D4d6);
IVe public constant veNft = IVe(0x77730ed992D286c53F3A0838232c3957dAeaaF73);
IMonoDepositor public constant monoDepositor =
IMonoDepositor(0x822EF744C568466D40Ba28b0f9e4A4961837a46a);
IRouter public constant router =
IRouter(0x77784f96C936042A3ADB1dD29C91a55EB2A4219f);
IElmoSolid elmoSolid =
IElmoSolid(0x7c90784d6144967bF7B8C89Ca06A3629d8abe642);
address public constant solid = 0x777172D858dC1599914a1C4c6c9fC48c99a60990;
address public constant moSolid =
0x848578e351D25B6Ec0d486E42677891521c3d743;
address public constant weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
uint256 public immutable migrateStartTime;
// Storage slots start here
address public owner;
uint256 internal _unlocked = 1; // For simple reentrancy check
uint256 public deadline; // No tokens can be migrated after this date
mapping(address => bool) public tokenIsEcosystemToken; // Mapping to keep track whether a specific token is migratable
mapping(address => mapping(address => uint256))
public tokensMigratedByAccount; // tokensMigratedByAccount[tokenAddress][accountAddress]
mapping(address => uint256) public tokensMigratedByToken; // Total tokens migrated by token address
mapping(address => bool) tokenMigrated; // Check if individual token is migrated already via LP
address[] public migratedTokenAddresses; // List of tokens migrated
mapping(address => mapping(uint256 => uint256))
public veNftMigratedIndexById; // tokenId index in array of user migrated veNFTs
mapping(address => uint256[]) public veNftMigratedIdByIndex; // array of veNFT tokenIds a user has migrated
mapping(address => uint256) public veNftMigratedAmountByAccount; // total SOLID equivalent migrated via veNFT of a user
uint256 public veNftMigratedAmountTotal; // total SOLID equivalent migrated via veNFTs
/**************************************************
* Events
**************************************************/
event NftMigrated(address indexed from, uint256 tokenId, uint256 amount);
event EcosystemTokenMigrated(
address indexed from,
address indexed token,
uint256 amount
);
event LpMigrated(
address indexed from,
address pair,
bool stable,
address token0,
address token1,
uint256 amount0,
uint256 amount1
);
/**************************************************
* Structs
**************************************************/
struct Token {
address id; // Token address
uint256 balance; // Token balance
uint256 migrated; // Tokens migrated
bool approved; // Did user approve tokens to be migrated
}
struct VeNft {
uint256 id; // NFT ID
uint256 migrated; // Amount migrated
}
/**************************************************
* Modifiers
**************************************************/
// Simple reentrancy check
modifier lock() {
require(_unlocked == 1);
_unlocked = 2;
_;
_unlocked = 1;
}
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
// Only allow migrating for predefined period
modifier onlyMigratePeriod() {
require(block.timestamp < deadline, "Migrate period over");
_;
}
// Only allow after predefined period
modifier onlyAfterMigratePeriod() {
require(block.timestamp >= deadline, "Migrate period not over");
_;
}
/**************************************************
* Initialization
**************************************************/
/**
* @notice Initialization
*/
constructor() {
owner = msg.sender;
migrateStartTime = block.timestamp;
deadline = migrateStartTime + 7 days; // Set deadline
}
/**
* @notice Transfers ownership
* @param newOwner new owner, or address(0) to renounce ownership
*/
function transferOwnership(address newOwner) external onlyOwner {
owner = newOwner;
}
/**
* @notice Extends deadline
* @param _newDeadline new deadline
* @dev _newDealine must be longer than existing deadline
*/
function extendDeadline(uint256 _newDeadline) external onlyOwner {
require(
_newDeadline > deadline,
"New dealdine must be longer than existing deadline"
);
deadline = _newDeadline;
}
function setEcosystemTokens(address[] memory _validEcosystemTokenAddresses)
external
onlyOwner
{
for (uint256 i = 0; i < _validEcosystemTokenAddresses.length; i++) {
address token = _validEcosystemTokenAddresses[i];
tokenIsEcosystemToken[token] = true;
tokenMigrated[token] = true;
migratedTokenAddresses.push(token);
}
}
/**************************************************
* ERC20 migrate logic
**************************************************/
/**
* @notice Primary migrate method for ERC20 ecosystem tokens
* @param tokenAddress Address of the token to migrate
* @dev Only allow migrating entire user balance. YOLO
* @dev Method can only be called during migrate period
*/
function migrate(address tokenAddress) external lock onlyMigratePeriod {
_migrate(tokenAddress, msg.sender);
}
function migrateFor(address tokenAddress, address recipient)
external
lock
onlyMigratePeriod
{
_migrate(tokenAddress, recipient);
}
function _migrate(address tokenAddress, address recipientAddress) internal {
require(tokenIsEcosystemToken[tokenAddress], "Invalid ecosystem token");
uint256 amountToMigrate = IERC20(tokenAddress).balanceOf(msg.sender);
IERC20(tokenAddress).transferFrom(
msg.sender,
address(this),
amountToMigrate
);
_recordMigration(tokenAddress, recipientAddress, amountToMigrate);
}
/**
* @notice Dump SOLID for moSOLID and migrate
*/
function migrateSolid(uint256 minimumAmountOut)
external
lock
onlyMigratePeriod
{
uint256 amountIn = IERC20(solid).balanceOf(msg.sender);
IERC20(solid).transferFrom(msg.sender, address(this), amountIn);
IRouter.route[] memory routes = new IRouter.route[](2);
routes[0] = IRouter.route({from: solid, to: weth, stable: false});
routes[1] = IRouter.route({from: weth, to: moSolid, stable: false});
IERC20(solid).approve(address(router), amountIn);
uint256[] memory amounts = router.swapExactTokensForTokens(
amountIn,
minimumAmountOut,
routes,
address(this),
block.timestamp
);
uint256 amountOut = amounts[amounts.length - 1];
_recordMigration(moSolid, msg.sender, amountOut);
}
function _recordMigration(
address tokenAddress,
address recipientAddress,
uint256 amountToMigrate
) internal {
// Record migrated token and amount
tokensMigratedByAccount[tokenAddress][
recipientAddress
] += amountToMigrate;
// Increment global token amount migrated for this token
tokensMigratedByToken[tokenAddress] += amountToMigrate;
emit EcosystemTokenMigrated(
recipientAddress,
tokenAddress,
amountToMigrate
);
}
/**************************************************
* elmoSOLID migrate logic
**************************************************/
function migrateElmoSolid() external {
uint256 shares = elmoSolid.balanceOf(msg.sender);
uint256 migratedAmount = elmoSolid.redeem(
shares,
address(this),
msg.sender
);
_recordMigration(moSolid, msg.sender, migratedAmount);
}
/**************************************************
* veNFT migrate logic
**************************************************/
/**
* @notice Migrate veNFT
* @param tokenId Token ID to migrate
* @dev veNFT is converted to moSOLID first
* @dev Method can only be called during migrate period
*/
function migrateVeNft(uint256 tokenId) external lock onlyMigratePeriod {
_migrateVeNft(tokenId, msg.sender);
}
function migrateVeNftFor(uint256 tokenId, address recipient)
external
lock
onlyMigratePeriod
{
_migrateVeNft(tokenId, recipient);
}
function _migrateVeNft(uint256 tokenId, address recipient) internal {
veNft.safeTransferFrom(msg.sender, address(this), tokenId); // Transfer veNFT to this contract
uint256 moSolidBalanceBefore = IERC20(moSolid).balanceOf(address(this));
veNft.safeTransferFrom(address(this), moSolid, tokenId); // Convert veNFT to moSOLID
uint256 moSolidBalanceAfter = IERC20(moSolid).balanceOf(address(this));
uint256 moSolidDelta = moSolidBalanceAfter - moSolidBalanceBefore;
_recordMigration(moSolid, recipient, moSolidDelta);
}
/**************************************************
* LP migrate logic
**************************************************/
function migrateMonoPair(IMonoPair monoPair)
external
lock
onlyMigratePeriod
{
_migrateMonoPair(monoPair, msg.sender);
}
function migrateMonoPairFor(IMonoPair monoPair, address recipient)
external
lock
onlyMigratePeriod
{
_migrateMonoPair(monoPair, recipient);
}
function _migrateMonoPair(IMonoPair monoPair, address recipient) internal {
// Withdraw from Monolith
IPair pair = IPair(monoPair.pool());
uint256 amount = monoPair.balanceOf(msg.sender);
monoPair.transferFrom(msg.sender, address(this), amount);
monoDepositor.withdraw(address(pair), amount);
// Withdraw from Solidly
require(factory.isPair(address(pair)), "Not a pair");
require(pair.transfer(address(pair), amount));
(uint256 amount0, uint256 amount1) = pair.burn(address(this));
address token0 = pair.token0();
address token1 = pair.token1();
tokensMigratedByAccount[token0][recipient] += amount0;
tokensMigratedByAccount[token1][recipient] += amount1;
tokensMigratedByToken[token0] += amount0;
tokensMigratedByToken[token1] += amount1;
require(amount0 > 0 && amount1 > 0, "Invalid amount");
if (tokenMigrated[token0] == false) {
tokenMigrated[token0] = true;
migratedTokenAddresses.push(token0);
}
if (tokenMigrated[token1] == false) {
tokenMigrated[token1] = true;
migratedTokenAddresses.push(token1);
}
emit LpMigrated(
recipient,
address(pair),
pair.stable(),
token0,
token1,
amount0,
amount1
);
}
/**************************************************
* Multisig Execution
**************************************************/
enum Operation {
Call,
DelegateCall
}
function execute(
address to,
uint256 value,
bytes calldata data,
Operation operation
) external payable onlyOwner onlyAfterMigratePeriod returns (bool success) {
if (operation == Operation.Call) {
success = executeCall(to, value, data);
} else if (operation == Operation.DelegateCall) {
success = executeDelegateCall(to, data);
}
require(success == true, "Transaction failed");
}
function executeCall(
address to,
uint256 value,
bytes memory data
) internal returns (bool success) {
assembly {
success := call(
gas(),
to,
value,
add(data, 0x20),
mload(data),
0,
0
)
}
}
function executeDelegateCall(address to, bytes memory data)
internal
returns (bool success)
{
assembly {
success := delegatecall(
gas(),
to,
add(data, 0x20),
mload(data),
0,
0
)
}
}
/**************************************************
* Refund methods
**************************************************/
/**
* @notice Owner callable function to issue refunds
* @param accountAddress User address to be refunded
* @param tokenAddress Token address to be refunded
*/
function refund(address accountAddress, address tokenAddress)
external
lock
onlyOwner
{
// Fetch amount of tokens to return
uint256 amountToReturn = tokensMigratedByAccount[tokenAddress][
accountAddress
];
tokensMigratedByAccount[tokenAddress][accountAddress] = 0; // Set user token balance to zero
tokensMigratedByToken[tokenAddress] -= amountToReturn; // Decrement global token amount migrated for this token
IERC20(tokenAddress).transfer(accountAddress, amountToReturn); // Return tokens to user
}
/**************************************************
* View methods
**************************************************/
function migratedTokenAddressesLength() external view returns (uint256) {
return migratedTokenAddresses.length;
}
/**
* @notice Fetch migrated tokens per account
* @param accountAddress Address of the account for which to view
* @return tokens Returns an array of migratable and migrated tokens without filtering
*/
function migratedTokensByAccount(address accountAddress)
external
view
returns (Token[] memory tokens)
{
Token[] memory _tokens = new Token[](migratedTokenAddresses.length); // Create an array of tokens
// Iterate through all valid migratable tokens
for (
uint256 tokenIdx = 0;
tokenIdx < migratedTokenAddresses.length;
tokenIdx++
) {
address tokenAddress = migratedTokenAddresses[tokenIdx]; // Fetch token address
IERC20 _token = IERC20(tokenAddress); // Fetch ERC20 interface for the current token
uint256 _userBalance = _token.balanceOf(accountAddress); // Fetch token balance
// Fetch migrated balance
uint256 _migratedBalance = tokensMigratedByAccount[tokenAddress][
accountAddress
];
// Fetch allowance state
bool _tokenTransferAllowed = _token.allowance(
accountAddress,
address(this)
) >= _userBalance;
// Fetch token metadata
Token memory token = Token({
id: tokenAddress,
balance: _userBalance,
migrated: _migratedBalance,
approved: _tokenTransferAllowed
});
_tokens[tokenIdx] = token; // Save migratable token data in array
}
tokens = _tokens; // Return migratable tokens
}
/**************************************************
* NFT
**************************************************/
function onERC721Received(
address,
address,
uint256,
bytes calldata
) external view returns (bytes4) {
require(msg.sender == address(veNft)); // Only accept veNfts
require(_unlocked == 2, "No direct transfers");
return this.onERC721Received.selector;
}
} |