Contract Source Code:
File 1 of 1 : EMTToken
// File: @openzeppelin/contracts/utils/introspection/IERC165.sol
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// File: @openzeppelin/contracts/token/ERC721/IERC721.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)
pragma solidity ^0.8.0;
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 tokenId
) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool _approved) external;
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(
address from,
address to,
uint256 tokenId,
bytes calldata data
) external;
}
// File: @openzeppelin/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: @openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File: @openzeppelin/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, _allowances[owner][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = _allowances[owner][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `sender` to `recipient`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
}
_balances[to] += amount;
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Spend `amount` form the allowance of `owner` toward `spender`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File: contracts/EMTToken.sol
/*
*
* EMTRI Corporation, incorporated and registered in California, USA; 'EMTRI'.
*
* EMTRI empowers the Farmers, Cultivators, Strain Producers and Distributors
* (clients) who work to bring quality medical-grade & premium adult-use cannabis
* to the market.
*
* EMTRI clients use Ethereum blockchain technologies to attest to their crop
* cultivations. In return for attesting to crop lifecycle events using blockchain,
* EMTRI rewards its clients with EMT tokens, the 'mint'.
*
* EMTRI introduces clients to cannabis distributors that sell the attested-to
* cannabis to wholesale and retail customers, who actually pay a cash premium to
* EMTRI because the cannabis their clients produce is attestested to using blockchain.
*
* Up to 50% of the cash premium paid to EMTRI is used to buyback EMT tokens on the
* Uniswap decentralized token exchange, the 'burn'.
* So, EMTs are minted only as cultivator and distributor rewards, and then bought
* back upon the sale of the client cannabis, thereby creating the Uniswap marketplace.
*
*
* https://abbey.ch/ -- Abbey Technology GmbH, Zug, Switzerland
*
* ABBEY DEFI
* ==========
* 1. Decentralized Finance (DeFi) is designed to be globally inclusive.
* 2. Centralized finance is based around private share sales to wealthy individuals or
* the trading of shares on national stock markets, both have high barriers to entry.
* 3. The Abbey DeFi methodology offers public and private companies exposure to DeFi.
*
* Abbey is a Uniswap-based DeFi service provider that allows companies to offer people a
* novel way to participate in the success a business may have in a decentralized manner.
*
* The premise is both elegant and simple, the company commits to a token buyback based on
* its revenues.
*
* Using Abbey as a Uniswap DeFi management agency, the company spends some revenues
* buying one side of a bespoke Uniswap trading pair. The other side of the Uniswap pair
* is the EMT token.
*
* DeFi traders wishing to participate in the success a business may have deposit USDC in return
* for EMT tokens. The Uniswap Automated Market Maker ensures DeFi market liquidity and
* legitimate price discovery. The more USDC that the company deposits in buy backs over time,
* the higher the value of the EMT token, as held by DeFi speculators.
*
*/
pragma solidity 0.8.15;
/**
* @title EMT Token contract for Uniswap v3.
* @author Abbey Technology GmbH
* @notice Token contract for use with Uniswap. Enforces restrictions outlined on the website.
*/
contract EMTToken is ERC20 {
/**
* @notice The details of a future company cashout.
*/
struct Notice {
// The maximum number of tokens proposed for sale.
uint256 amount;
// The date after which company tokens can be swapped.
uint256 releaseDate;
}
// Event fired when a restricted wallet gives notice of a potential future trade.
event NoticeGiven(address indexed who, uint256 amount, uint256 releaseDate);
/**
* @notice Notice must be given to the public before treasury tokens can be swapped.
*/
Notice public noticeTreasury;
/**
* @notice Notice must be given to the public before Liquidity Tokens can be removed from the pool.
*/
Notice public noticeLiquidity;
/**
* @notice The account that created this contract, also functions as the liquidity provider.
*/
address public owner;
/**
* @notice Holder of the company's tokens. Must give notice before tokens are moved.
*/
address public treasury;
/**
* @notice The account that performs the buyback of tokens, all bought tokens are burned.
* @dev They cannot be autoburned during transfer as the Uniswap client prevents the transaction.
*/
address public buyback;
/**
* @notice The account that facilitates moving tokens between Mainnet and Efixii L2.
*/
address public flip;
/**
* @notice The address of the Uniswap Pool ERC20 contract holding the Liquidity Pool tokens.
*/
address public poolAddress;
/**
* @notice The address of the Uniswap NFT ERC721 Positions contract that tracks ownership of liquidity pools.
*/
address public positionsAddress;
/**
* @notice The NFT id of the Liquidity Pool in the Uniswap Positions contract.
*/
uint256 public nftId;
/**
* @notice The minimum duration notice given (to give the public a chance to act and to prevent a rug pull).
*/
uint256 private MinimumNotice = 7 days;
/**
* @notice Restrict functionaly to the contract owner.
*/
modifier onlyOwner {
require(_msgSender() == owner, "You are not Owner.");
_;
}
/**
* @notice Create the contract setting already known values that are unlikely to change. The tokens for the Uniswap
* liquidity pool are also created.
*
* @param initialSupply The number of tokens to create the Uniswap pool.
* @param name The name of the token.
* @param symbol The short symbol for this token.
* @param treasuryAddr The address of the treasury wallet.
* @param buybackAddr The wallet that performs buybacks and optional burns of tokens.
* @param flipAddr The wallet used to move tokens between L2 and Mainnet.
*/
constructor(uint256 initialSupply, string memory name, string memory symbol, address treasuryAddr, address buybackAddr, address flipAddr, address positionsAddr) ERC20(name, symbol) {
owner = _msgSender();
treasury = treasuryAddr;
buyback = buybackAddr;
flip = flipAddr;
positionsAddress = positionsAddr;
_mint(owner, initialSupply);
}
/**
* @notice Set the address of the account holding EMT tokens on behalf of the company.
*/
function setTreasury(address who) public onlyOwner {
require(who != address(0x0), "Cannot assign to null address");
_migrateTokens(treasury, who);
treasury = who;
}
/**
* @notice Set the address of the company account that buys tokens to increase the token price.
*/
function setBuyback(address who) public onlyOwner {
require(who != address(0x0), "Cannot assign to null address");
_migrateTokens(buyback, who);
buyback = who;
}
/**
* @notice Set the address of the account that allows moving tokens between L2 and Mainnet.
*/
function setFlip(address who) public onlyOwner {
require(who != address(0x0), "Cannot assign to null address");
_migrateTokens(flip, who);
flip = who;
}
/**
* When changing the address of a role in the contract move all tokens to the new
* address - the tokens are restricted by role so need to move with the role address
* change.
*/
function _migrateTokens(address from, address to) private {
if(from != address(0x0) && balanceOf(from) > 0)
_transfer(from, to, balanceOf(from));
}
/**
* @notice Set the address of the Uniswap Pool contract.
*/
function setPoolAddress(address who) public onlyOwner {
poolAddress = who;
}
/**
* @notice Set the address of the Uniswap NFT contract that tracks Liquidity Pool ownership.
*/
function setPositionsAddress(address who) public onlyOwner {
positionsAddress = who;
}
/**
* @notice Set the id of the position token that determines ownership of the Liquidity Pool.
*/
function setNftId(uint256 id) public onlyOwner {
nftId = id;
}
/**
* @notice Treasury tokens must give advanced notice to the public before they can be used.
* A public announcement will be made at the same time this notice is set in the contract.
*
* @param who The treasury address.
* @param amount The maximum number of tokens (in wei).
* @param numSeconds The number of seconds the tokens are held before being acted on.
*/
function treasuryTransferNotice(address who, uint256 amount, uint256 numSeconds) public onlyOwner {
require(who == treasury, "Specified address is not Treasury.");
require(numSeconds >= MinimumNotice, "Not enough notice given.");
uint256 when = block.timestamp + (numSeconds * 1 seconds);
require(noticeTreasury.releaseDate == 0 || block.timestamp >= noticeTreasury.releaseDate, "Cannot overwrite an active existing notice.");
require(amount <= balanceOf(who), "Can't give notice for more EMT tokens than owned.");
noticeTreasury = Notice(amount, when);
emit NoticeGiven(who, amount, when);
}
/**
* @notice Liquidity Pool tokens must give advanced notice to the public before they can be used.
* A public announcement will be made at the same time this notice is set in the contract.
*
* @param who The owner of the Uniswap Positions NFT token.
* @param amount The maximum number of tokens (in wei).
* @param numSeconds The number of seconds the tokens are held before being acted on.
*/
function liquidityRedemptionNotice(address who, uint256 amount, uint256 numSeconds) public onlyOwner {
require(positionsAddress != address(0), "Uniswap Position Manager must be set.");
require(numSeconds >= MinimumNotice, "Not enough notice given.");
require(nftId != 0, "Uniswap Position NFT Id must be set.");
require(poolAddress != address(0), "The Uniswap Pool contract address must be set.");
IERC721 positions = IERC721(positionsAddress);
address lpOwner = positions.ownerOf(nftId);
require(who == lpOwner, "The specified address does not own the Positions NFT Token.");
uint256 when = block.timestamp + (numSeconds * 1 seconds);
require(noticeLiquidity.releaseDate == 0 || block.timestamp >= noticeLiquidity.releaseDate, "Cannot overwrite an active existing notice.");
require(amount <= balanceOf(poolAddress), "Can't give notice for more Liquidity Tokens than owned.");
noticeLiquidity = Notice(amount, when);
emit NoticeGiven(who, amount, when);
}
/**
* @notice Enforce rules around the company accounts:
* - Once buyback buys tokens they can never be moved, the only real option is to burn.
* - Two key accounts: treasury and the owner of the liquidity pool are restricted.
* - A public announcement of the company's intent along with a time locked notice set in this contract before any token movement.
* - Only after the deadline can these restricted tokens move.
* - No restrictions are in place for any other wallet.
*/
function _transfer(address sender, address recipient, uint256 amount) internal override {
require(sender != buyback, "Buyback cannot transfer tokens, it can only burn.");
if(sender == treasury) {
require(noticeTreasury.releaseDate != 0 && block.timestamp >= noticeTreasury.releaseDate, "Notice period has not been set or has not expired.");
require(amount <= noticeTreasury.amount, "Treasury can't transfer more tokens than given notice for.");
// Clear the remaining notice balance, this prevents giving notice on all tokens and
// trickling them out.
noticeTreasury = Notice(0, 0);
}
else if(nftId != 0) { // Check if the receiver is the Liquidity Pool owner.
IERC721 positions = IERC721(positionsAddress);
address lpOwner = positions.ownerOf(nftId);
if(recipient == lpOwner) {
require(noticeLiquidity.releaseDate != 0 && block.timestamp >= noticeLiquidity.releaseDate, "LP notice period has not been set or has not expired.");
require(amount <= noticeLiquidity.amount, "LP can't transfer more tokens than given notice for.");
// Clear the remaining notice balance, this prevents giving notice on all tokens and
// trickling them out.
noticeLiquidity = Notice(0, 0);
}
}
super._transfer(sender, recipient, amount);
}
/**
* @notice mint is only called when EMT tokens are burned on the L2 side of the EMT bridge
* and are then minted one-for-one to this contract on the Mainnet L1 side of the EMT bridge.
* Once minted, EMTs are ready to trade on Uniswap.
*
* @param who The address to mint to the tokens to.
* @param quantity The number of tokens to create, in wei.
*/
function mint(address who, uint256 quantity) public onlyOwner {
_mint(who, quantity);
}
/**
* @notice Tokens are burned here on Mainnet to reduce total supply available to trade on Uniswap.
*
* @param quantity The number of tokens to destroy, in wei.
*/
function burn(uint256 quantity) public {
_burn(_msgSender(), quantity);
}
}