Contract Name:
UbiquityAlgorithmicDollar
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;
import "./interfaces/IIncentive.sol";
import "./ERC20Ubiquity.sol";
contract UbiquityAlgorithmicDollar is ERC20Ubiquity {
/// @notice get associated incentive contract, 0 address if N/A
mapping(address => address) public incentiveContract;
event IncentiveContractUpdate(
address indexed _incentivized,
address indexed _incentiveContract
);
constructor(address _manager)
ERC20Ubiquity(_manager, "Ubiquity Algorithmic Dollar", "uAD")
{} // solhint-disable-line no-empty-blocks
/// @param account the account to incentivize
/// @param incentive the associated incentive contract
/// @notice only UAD manager can set Incentive contract
function setIncentiveContract(address account, address incentive) external {
require(
ERC20Ubiquity.manager.hasRole(
ERC20Ubiquity.manager.UBQ_TOKEN_MANAGER_ROLE(),
msg.sender
),
"Dollar: must have admin role"
);
incentiveContract[account] = incentive;
emit IncentiveContractUpdate(account, incentive);
}
function _checkAndApplyIncentives(
address sender,
address recipient,
uint256 amount
) internal {
// incentive on sender
address senderIncentive = incentiveContract[sender];
if (senderIncentive != address(0)) {
IIncentive(senderIncentive).incentivize(
sender,
recipient,
msg.sender,
amount
);
}
// incentive on recipient
address recipientIncentive = incentiveContract[recipient];
if (recipientIncentive != address(0)) {
IIncentive(recipientIncentive).incentivize(
sender,
recipient,
msg.sender,
amount
);
}
// incentive on operator
address operatorIncentive = incentiveContract[msg.sender];
if (
msg.sender != sender &&
msg.sender != recipient &&
operatorIncentive != address(0)
) {
IIncentive(operatorIncentive).incentivize(
sender,
recipient,
msg.sender,
amount
);
}
// all incentive, if active applies to every transfer
address allIncentive = incentiveContract[address(0)];
if (allIncentive != address(0)) {
IIncentive(allIncentive).incentivize(
sender,
recipient,
msg.sender,
amount
);
}
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal override {
super._transfer(sender, recipient, amount);
_checkAndApplyIncentives(sender, recipient, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;
/// @title incentive contract interface
/// @notice Called by uAD token contract when transferring with an incentivized address
/// @dev should be appointed as a Minter or Burner as needed
interface IIncentive {
/// @notice apply incentives on transfer
/// @param sender the sender address of uAD
/// @param receiver the receiver address of uAD
/// @param operator the operator (msg.sender) of the transfer
/// @param amount the amount of uAD transferred
function incentivize(
address sender,
address receiver,
address operator,
uint256 amount
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Pausable.sol";
import "./UbiquityAlgorithmicDollarManager.sol";
import "./interfaces/IERC20Ubiquity.sol";
/// @title ERC20 Ubiquity preset
/// @author Ubiquity Algorithmic Dollar
/// @notice ERC20 with :
/// - ERC20 minter, burner and pauser
/// - draft-ERC20 permit
/// - Ubiquity Manager access control
contract ERC20Ubiquity is IERC20Ubiquity, ERC20, ERC20Burnable, ERC20Pausable {
UbiquityAlgorithmicDollarManager public manager;
// solhint-disable-next-line var-name-mixedcase
bytes32 public DOMAIN_SEPARATOR;
// keccak256("Permit(address owner,address spender,
// uint256 value,uint256 nonce,uint256 deadline)");
bytes32 public constant PERMIT_TYPEHASH =
0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
mapping(address => uint256) public nonces;
string private _tokenName;
string private _symbol;
// ----------- Modifiers -----------
modifier onlyMinter() {
require(
manager.hasRole(manager.UBQ_MINTER_ROLE(), msg.sender),
"Governance token: not minter"
);
_;
}
modifier onlyBurner() {
require(
manager.hasRole(manager.UBQ_BURNER_ROLE(), msg.sender),
"Governance token: not burner"
);
_;
}
modifier onlyPauser() {
require(
manager.hasRole(manager.PAUSER_ROLE(), msg.sender),
"Governance token: not pauser"
);
_;
}
modifier onlyAdmin() {
require(
manager.hasRole(manager.DEFAULT_ADMIN_ROLE(), msg.sender),
"ERC20: deployer must be manager admin"
);
_;
}
constructor(
address _manager,
string memory name_,
string memory symbol_
) ERC20(name_, symbol_) {
_tokenName = name_;
_symbol = symbol_;
manager = UbiquityAlgorithmicDollarManager(_manager);
// sender must be UbiquityAlgorithmicDollarManager roleAdmin
// because he will get the admin, minter and pauser role on uAD and we want to
// manage all permissions through the manager
require(
manager.hasRole(manager.DEFAULT_ADMIN_ROLE(), msg.sender),
"ERC20: deployer must be manager admin"
);
uint256 chainId;
// solhint-disable-next-line no-inline-assembly
assembly {
chainId := chainid()
}
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256(
// solhint-disable-next-line max-line-length
"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
),
keccak256(bytes(name())),
keccak256(bytes("1")),
chainId,
address(this)
)
);
}
/// @notice setSymbol update token symbol
/// @param newSymbol new token symbol
function setSymbol(string memory newSymbol) external onlyAdmin {
_symbol = newSymbol;
}
/// @notice setName update token name
/// @param newName new token name
function setName(string memory newName) external onlyAdmin {
_tokenName = newName;
}
/// @notice permit spending of uAD. owner has signed a message allowing
/// spender to transfer up to amount uAD
/// @param owner the uAD holder
/// @param spender the approved operator
/// @param value the amount approved
/// @param deadline the deadline after which the approval is no longer valid
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external override {
// solhint-disable-next-line not-rely-on-time
require(deadline >= block.timestamp, "Dollar: EXPIRED");
bytes32 digest =
keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
owner,
spender,
value,
nonces[owner]++,
deadline
)
)
)
);
address recoveredAddress = ecrecover(digest, v, r, s);
require(
recoveredAddress != address(0) && recoveredAddress == owner,
"Dollar: INVALID_SIGNATURE"
);
_approve(owner, spender, value);
}
/// @notice burn UAD tokens from caller
/// @param amount the amount to burn
function burn(uint256 amount)
public
override(ERC20Burnable, IERC20Ubiquity)
whenNotPaused
{
super.burn(amount);
emit Burning(msg.sender, amount);
}
/// @notice burn uAD tokens from specified account
/// @param account the account to burn from
/// @param amount the amount to burn
function burnFrom(address account, uint256 amount)
public
override(ERC20Burnable, IERC20Ubiquity)
onlyBurner
whenNotPaused // to suppress ? if BURNER_ROLE should do it even paused ?
{
_burn(account, amount);
emit Burning(account, amount);
}
// @dev Creates `amount` new tokens for `to`.
function mint(address to, uint256 amount)
public
override
onlyMinter
whenNotPaused
{
_mint(to, amount);
emit Minting(to, msg.sender, amount);
}
// @dev Pauses all token transfers.
function pause() public onlyPauser {
_pause();
}
// @dev Unpauses all token transfers.
function unpause() public onlyPauser {
_unpause();
}
/**
* @dev Returns the name of the token.
*/
function name() public view override(ERC20) returns (string memory) {
return _tokenName;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view override(ERC20) returns (string memory) {
return _symbol;
}
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual override(ERC20, ERC20Pausable) {
super._beforeTokenTransfer(from, to, amount);
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual override whenNotPaused {
super._transfer(sender, recipient, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC20.sol";
import "./extensions/IERC20Metadata.sol";
import "../../utils/Context.sol";
/**
* @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 guidelines: functions revert instead
* of 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 defaut 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:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, 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}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), 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}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - 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) {
_approve(_msgSender(), spender, _allowances[_msgSender()][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) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is 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:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(address sender, address recipient, uint256 amount) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] = senderBalance - amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, 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:
*
* - `to` 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);
}
/**
* @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");
_balances[account] = accountBalance - amount;
_totalSupply -= amount;
emit Transfer(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 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 to 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 { }
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC20.sol";
import "../../../utils/Context.sol";
/**
* @dev Extension of {ERC20} that allows token holders to destroy both their own
* tokens and those that they have an allowance for, in a way that can be
* recognized off-chain (via event analysis).
*/
abstract contract ERC20Burnable is Context, ERC20 {
/**
* @dev Destroys `amount` tokens from the caller.
*
* See {ERC20-_burn}.
*/
function burn(uint256 amount) public virtual {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, deducting from the caller's
* allowance.
*
* See {ERC20-_burn} and {ERC20-allowance}.
*
* Requirements:
*
* - the caller must have allowance for ``accounts``'s tokens of at least
* `amount`.
*/
function burnFrom(address account, uint256 amount) public virtual {
uint256 currentAllowance = allowance(account, _msgSender());
require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance");
_approve(account, _msgSender(), currentAllowance - amount);
_burn(account, amount);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../ERC20.sol";
import "../../../security/Pausable.sol";
/**
* @dev ERC20 token with pausable token transfers, minting and burning.
*
* Useful for scenarios such as preventing trades until the end of an evaluation
* period, or having an emergency switch for freezing all token transfers in the
* event of a large bug.
*/
abstract contract ERC20Pausable is ERC20, Pausable {
/**
* @dev See {ERC20-_beforeTokenTransfer}.
*
* Requirements:
*
* - the contract must not be paused.
*/
function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {
super._beforeTokenTransfer(from, to, amount);
require(!paused(), "ERC20Pausable: token transfer while paused");
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.3;
import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "./interfaces/IUbiquityAlgorithmicDollar.sol";
import "./interfaces/ICurveFactory.sol";
import "./interfaces/IMetaPool.sol";
import "./TWAPOracle.sol";
/// @title A central config for the uAD system. Also acts as a central
/// access control manager.
/// @notice For storing constants. For storing variables and allowing them to
/// be changed by the admin (governance)
/// @dev This should be used as a central access control manager which other
/// contracts use to check permissions
contract UbiquityAlgorithmicDollarManager is AccessControl {
using SafeERC20 for IERC20;
bytes32 public constant UBQ_MINTER_ROLE = keccak256("UBQ_MINTER_ROLE");
bytes32 public constant UBQ_BURNER_ROLE = keccak256("UBQ_BURNER_ROLE");
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
bytes32 public constant COUPON_MANAGER_ROLE = keccak256("COUPON_MANAGER");
bytes32 public constant BONDING_MANAGER_ROLE = keccak256("BONDING_MANAGER");
bytes32 public constant INCENTIVE_MANAGER_ROLE =
keccak256("INCENTIVE_MANAGER");
bytes32 public constant UBQ_TOKEN_MANAGER_ROLE =
keccak256("UBQ_TOKEN_MANAGER_ROLE");
address public twapOracleAddress;
address public debtCouponAddress;
address public dollarTokenAddress; // uAD
address public couponCalculatorAddress;
address public dollarMintingCalculatorAddress;
address public bondingShareAddress;
address public bondingContractAddress;
address public stableSwapMetaPoolAddress;
address public curve3PoolTokenAddress; // 3CRV
address public treasuryAddress;
address public governanceTokenAddress; // uGOV
address public sushiSwapPoolAddress; // sushi pool uAD-uGOV
address public masterChefAddress;
address public formulasAddress;
address public autoRedeemTokenAddress; // uAR
address public uarCalculatorAddress; // uAR calculator
//key = address of couponmanager, value = excessdollardistributor
mapping(address => address) private _excessDollarDistributors;
modifier onlyAdmin() {
require(
hasRole(DEFAULT_ADMIN_ROLE, msg.sender),
"uADMGR: Caller is not admin"
);
_;
}
constructor(address _admin) {
_setupRole(DEFAULT_ADMIN_ROLE, _admin);
_setupRole(UBQ_MINTER_ROLE, _admin);
_setupRole(PAUSER_ROLE, _admin);
_setupRole(COUPON_MANAGER_ROLE, _admin);
_setupRole(BONDING_MANAGER_ROLE, _admin);
_setupRole(INCENTIVE_MANAGER_ROLE, _admin);
_setupRole(UBQ_TOKEN_MANAGER_ROLE, address(this));
}
// TODO Add a generic setter for extra addresses that needs to be linked
function setTwapOracleAddress(address _twapOracleAddress)
external
onlyAdmin
{
twapOracleAddress = _twapOracleAddress;
// to be removed
TWAPOracle oracle = TWAPOracle(twapOracleAddress);
oracle.update();
}
function setuARTokenAddress(address _uarTokenAddress) external onlyAdmin {
autoRedeemTokenAddress = _uarTokenAddress;
}
function setDebtCouponAddress(address _debtCouponAddress)
external
onlyAdmin
{
debtCouponAddress = _debtCouponAddress;
}
function setIncentiveToUAD(address _account, address _incentiveAddress)
external
onlyAdmin
{
IUbiquityAlgorithmicDollar(dollarTokenAddress).setIncentiveContract(
_account,
_incentiveAddress
);
}
function setDollarTokenAddress(address _dollarTokenAddress)
external
onlyAdmin
{
dollarTokenAddress = _dollarTokenAddress;
}
function setGovernanceTokenAddress(address _governanceTokenAddress)
external
onlyAdmin
{
governanceTokenAddress = _governanceTokenAddress;
}
function setSushiSwapPoolAddress(address _sushiSwapPoolAddress)
external
onlyAdmin
{
sushiSwapPoolAddress = _sushiSwapPoolAddress;
}
function setUARCalculatorAddress(address _uarCalculatorAddress)
external
onlyAdmin
{
uarCalculatorAddress = _uarCalculatorAddress;
}
function setCouponCalculatorAddress(address _couponCalculatorAddress)
external
onlyAdmin
{
couponCalculatorAddress = _couponCalculatorAddress;
}
function setDollarMintingCalculatorAddress(
address _dollarMintingCalculatorAddress
) external onlyAdmin {
dollarMintingCalculatorAddress = _dollarMintingCalculatorAddress;
}
function setExcessDollarsDistributor(
address debtCouponManagerAddress,
address excessCouponDistributor
) external onlyAdmin {
_excessDollarDistributors[
debtCouponManagerAddress
] = excessCouponDistributor;
}
function setMasterChefAddress(address _masterChefAddress)
external
onlyAdmin
{
masterChefAddress = _masterChefAddress;
}
function setFormulasAddress(address _formulasAddress) external onlyAdmin {
formulasAddress = _formulasAddress;
}
function setBondingShareAddress(address _bondingShareAddress)
external
onlyAdmin
{
bondingShareAddress = _bondingShareAddress;
}
function setStableSwapMetaPoolAddress(address _stableSwapMetaPoolAddress)
external
onlyAdmin
{
stableSwapMetaPoolAddress = _stableSwapMetaPoolAddress;
}
/**
@notice set the bonding bontract smart contract address
@dev bonding contract participants deposit curve LP token
for a certain duration to earn uGOV and more curve LP token
@param _bondingContractAddress bonding contract address
*/
function setBondingContractAddress(address _bondingContractAddress)
external
onlyAdmin
{
bondingContractAddress = _bondingContractAddress;
}
/**
@notice set the treasury address
@dev the treasury fund is used to maintain the protocol
@param _treasuryAddress treasury fund address
*/
function setTreasuryAddress(address _treasuryAddress) external onlyAdmin {
treasuryAddress = _treasuryAddress;
}
/**
@notice deploy a new Curve metapools for uAD Token uAD/3Pool
@dev From the curve documentation for uncollateralized algorithmic
stablecoins amplification should be 5-10
@param _curveFactory MetaPool factory address
@param _crvBasePool Address of the base pool to use within the new metapool.
@param _crv3PoolTokenAddress curve 3Pool token Address
@param _amplificationCoefficient amplification coefficient. The smaller
it is the closer to a constant product we are.
@param _fee Trade fee, given as an integer with 1e10 precision.
*/
function deployStableSwapPool(
address _curveFactory,
address _crvBasePool,
address _crv3PoolTokenAddress,
uint256 _amplificationCoefficient,
uint256 _fee
) external onlyAdmin {
// Create new StableSwap meta pool (uAD <-> 3Crv)
address metaPool =
ICurveFactory(_curveFactory).deploy_metapool(
_crvBasePool,
ERC20(dollarTokenAddress).name(),
ERC20(dollarTokenAddress).symbol(),
dollarTokenAddress,
_amplificationCoefficient,
_fee
);
stableSwapMetaPoolAddress = metaPool;
// Approve the newly-deployed meta pool to transfer this contract's funds
uint256 crv3PoolTokenAmount =
IERC20(_crv3PoolTokenAddress).balanceOf(address(this));
uint256 uADTokenAmount =
IERC20(dollarTokenAddress).balanceOf(address(this));
// safe approve revert if approve from non-zero to non-zero allowance
IERC20(_crv3PoolTokenAddress).safeApprove(metaPool, 0);
IERC20(_crv3PoolTokenAddress).safeApprove(
metaPool,
crv3PoolTokenAmount
);
IERC20(dollarTokenAddress).safeApprove(metaPool, 0);
IERC20(dollarTokenAddress).safeApprove(metaPool, uADTokenAmount);
// coin at index 0 is uAD and index 1 is 3CRV
require(
IMetaPool(metaPool).coins(0) == dollarTokenAddress &&
IMetaPool(metaPool).coins(1) == _crv3PoolTokenAddress,
"uADMGR: COIN_ORDER_MISMATCH"
);
// Add the initial liquidity to the StableSwap meta pool
uint256[2] memory amounts =
[
IERC20(dollarTokenAddress).balanceOf(address(this)),
IERC20(_crv3PoolTokenAddress).balanceOf(address(this))
];
// set curve 3Pool address
curve3PoolTokenAddress = _crv3PoolTokenAddress;
IMetaPool(metaPool).add_liquidity(amounts, 0, msg.sender);
}
function getExcessDollarsDistributor(address _debtCouponManagerAddress)
external
view
returns (address)
{
return _excessDollarDistributors[_debtCouponManagerAddress];
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.3;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @title ERC20 Ubiquiti preset interface
/// @author Ubiquity Algorithmic Dollar
interface IERC20Ubiquity is IERC20 {
// ----------- Events -----------
event Minting(
address indexed _to,
address indexed _minter,
uint256 _amount
);
event Burning(address indexed _burned, uint256 _amount);
// ----------- State changing api -----------
function burn(uint256 amount) external;
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
// ----------- Burner only state changing api -----------
function burnFrom(address account, uint256 amount) external;
// ----------- Minter only state changing api -----------
function mint(address account, uint256 amount) external;
}
// SPDX-License-Identifier: MIT
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 `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, 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 `sender` to `recipient` 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 sender, address recipient, 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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
/**
* @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);
}
// SPDX-License-Identifier: MIT
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) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../utils/Context.sol";
import "../utils/Strings.sol";
import "../utils/introspection/ERC165.sol";
/**
* @dev External interface of AccessControl declared to support ERC165 detection.
*/
interface IAccessControl {
function hasRole(bytes32 role, address account) external view returns (bool);
function getRoleAdmin(bytes32 role) external view returns (bytes32);
function grantRole(bytes32 role, address account) external;
function revokeRole(bytes32 role, address account) external;
function renounceRole(bytes32 role, address account) external;
}
/**
* @dev Contract module that allows children to implement role-based access
* control mechanisms. This is a lightweight version that doesn't allow enumerating role
* members except through off-chain means by accessing the contract event logs. Some
* applications may benefit from on-chain enumerability, for those cases see
* {AccessControlEnumerable}.
*
* Roles are referred to by their `bytes32` identifier. These should be exposed
* in the external API and be unique. The best way to achieve this is by
* using `public constant` hash digests:
*
* ```
* bytes32 public constant MY_ROLE = keccak256("MY_ROLE");
* ```
*
* Roles can be used to represent a set of permissions. To restrict access to a
* function call, use {hasRole}:
*
* ```
* function foo() public {
* require(hasRole(MY_ROLE, msg.sender));
* ...
* }
* ```
*
* Roles can be granted and revoked dynamically via the {grantRole} and
* {revokeRole} functions. Each role has an associated admin role, and only
* accounts that have a role's admin role can call {grantRole} and {revokeRole}.
*
* By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means
* that only accounts with this role will be able to grant or revoke other
* roles. More complex role relationships can be created by using
* {_setRoleAdmin}.
*
* WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to
* grant and revoke this role. Extra precautions should be taken to secure
* accounts that have been granted it.
*/
abstract contract AccessControl is Context, IAccessControl, ERC165 {
struct RoleData {
mapping (address => bool) members;
bytes32 adminRole;
}
mapping (bytes32 => RoleData) private _roles;
bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;
/**
* @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`
*
* `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite
* {RoleAdminChanged} not being emitted signaling this.
*
* _Available since v3.1._
*/
event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);
/**
* @dev Emitted when `account` is granted `role`.
*
* `sender` is the account that originated the contract call, an admin role
* bearer except when using {_setupRole}.
*/
event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Emitted when `account` is revoked `role`.
*
* `sender` is the account that originated the contract call:
* - if using `revokeRole`, it is the admin role bearer
* - if using `renounceRole`, it is the role bearer (i.e. `account`)
*/
event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);
/**
* @dev Modifier that checks that an account has a specific role. Reverts
* with a standardized message including the required role.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*
* _Available since v4.1._
*/
modifier onlyRole(bytes32 role) {
_checkRole(role, _msgSender());
_;
}
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IAccessControl).interfaceId
|| super.supportsInterface(interfaceId);
}
/**
* @dev Returns `true` if `account` has been granted `role`.
*/
function hasRole(bytes32 role, address account) public view override returns (bool) {
return _roles[role].members[account];
}
/**
* @dev Revert with a standard message if `account` is missing `role`.
*
* The format of the revert reason is given by the following regular expression:
*
* /^AccessControl: account (0x[0-9a-f]{20}) is missing role (0x[0-9a-f]{32})$/
*/
function _checkRole(bytes32 role, address account) internal view {
if(!hasRole(role, account)) {
revert(string(abi.encodePacked(
"AccessControl: account ",
Strings.toHexString(uint160(account), 20),
" is missing role ",
Strings.toHexString(uint256(role), 32)
)));
}
}
/**
* @dev Returns the admin role that controls `role`. See {grantRole} and
* {revokeRole}.
*
* To change a role's admin, use {_setRoleAdmin}.
*/
function getRoleAdmin(bytes32 role) public view override returns (bytes32) {
return _roles[role].adminRole;
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_grantRole(role, account);
}
/**
* @dev Revokes `role` from `account`.
*
* If `account` had been granted `role`, emits a {RoleRevoked} event.
*
* Requirements:
*
* - the caller must have ``role``'s admin role.
*/
function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {
_revokeRole(role, account);
}
/**
* @dev Revokes `role` from the calling account.
*
* Roles are often managed via {grantRole} and {revokeRole}: this function's
* purpose is to provide a mechanism for accounts to lose their privileges
* if they are compromised (such as when a trusted device is misplaced).
*
* If the calling account had been granted `role`, emits a {RoleRevoked}
* event.
*
* Requirements:
*
* - the caller must be `account`.
*/
function renounceRole(bytes32 role, address account) public virtual override {
require(account == _msgSender(), "AccessControl: can only renounce roles for self");
_revokeRole(role, account);
}
/**
* @dev Grants `role` to `account`.
*
* If `account` had not been already granted `role`, emits a {RoleGranted}
* event. Note that unlike {grantRole}, this function doesn't perform any
* checks on the calling account.
*
* [WARNING]
* ====
* This function should only be called from the constructor when setting
* up the initial roles for the system.
*
* Using this function in any other way is effectively circumventing the admin
* system imposed by {AccessControl}.
* ====
*/
function _setupRole(bytes32 role, address account) internal virtual {
_grantRole(role, account);
}
/**
* @dev Sets `adminRole` as ``role``'s admin role.
*
* Emits a {RoleAdminChanged} event.
*/
function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {
emit RoleAdminChanged(role, getRoleAdmin(role), adminRole);
_roles[role].adminRole = adminRole;
}
function _grantRole(bytes32 role, address account) private {
if (!hasRole(role, account)) {
_roles[role].members[account] = true;
emit RoleGranted(role, account, _msgSender());
}
}
function _revokeRole(bytes32 role, address account) private {
if (hasRole(role, account)) {
_roles[role].members[account] = false;
emit RoleRevoked(role, account, _msgSender());
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.3;
import "./IERC20Ubiquity.sol";
/// @title UAD stablecoin interface
/// @author Ubiquity Algorithmic Dollar
interface IUbiquityAlgorithmicDollar is IERC20Ubiquity {
event IncentiveContractUpdate(
address indexed _incentivized,
address indexed _incentiveContract
);
function setIncentiveContract(address account, address incentive) external;
function incentiveContract(address account) external view returns (address);
}
// SPDX-License-Identifier: MIT
// !! THIS FILE WAS AUTOGENERATED BY abi-to-sol. SEE BELOW FOR SOURCE. !!
pragma solidity ^0.8.3;
interface ICurveFactory {
event BasePoolAdded(address base_pool, address implementat);
event MetaPoolDeployed(
address coin,
address base_pool,
uint256 A,
uint256 fee,
address deployer
);
function find_pool_for_coins(address _from, address _to)
external
view
returns (address);
function find_pool_for_coins(
address _from,
address _to,
uint256 i
) external view returns (address);
function get_n_coins(address _pool)
external
view
returns (uint256, uint256);
function get_coins(address _pool) external view returns (address[2] memory);
function get_underlying_coins(address _pool)
external
view
returns (address[8] memory);
function get_decimals(address _pool)
external
view
returns (uint256[2] memory);
function get_underlying_decimals(address _pool)
external
view
returns (uint256[8] memory);
function get_rates(address _pool) external view returns (uint256[2] memory);
function get_balances(address _pool)
external
view
returns (uint256[2] memory);
function get_underlying_balances(address _pool)
external
view
returns (uint256[8] memory);
function get_A(address _pool) external view returns (uint256);
function get_fees(address _pool) external view returns (uint256, uint256);
function get_admin_balances(address _pool)
external
view
returns (uint256[2] memory);
function get_coin_indices(
address _pool,
address _from,
address _to
)
external
view
returns (
int128,
int128,
bool
);
function add_base_pool(
address _base_pool,
address _metapool_implementation,
address _fee_receiver
) external;
function deploy_metapool(
address _base_pool,
string memory _name,
string memory _symbol,
address _coin,
uint256 _A,
uint256 _fee
) external returns (address);
function commit_transfer_ownership(address addr) external;
function accept_transfer_ownership() external;
function set_fee_receiver(address _base_pool, address _fee_receiver)
external;
function convert_fees() external returns (bool);
function admin() external view returns (address);
function future_admin() external view returns (address);
function pool_list(uint256 arg0) external view returns (address);
function pool_count() external view returns (uint256);
function base_pool_list(uint256 arg0) external view returns (address);
function base_pool_count() external view returns (uint256);
function fee_receiver(address arg0) external view returns (address);
}
// SPDX-License-Identifier: UNLICENSED
// !! THIS FILE WAS AUTOGENERATED BY abi-to-sol. SEE BELOW FOR SOURCE. !!
pragma solidity ^0.8.3;
interface IMetaPool {
event Transfer(
address indexed sender,
address indexed receiver,
uint256 value
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event TokenExchange(
address indexed buyer,
int128 sold_id,
uint256 tokens_sold,
int128 bought_id,
uint256 tokens_bought
);
event TokenExchangeUnderlying(
address indexed buyer,
int128 sold_id,
uint256 tokens_sold,
int128 bought_id,
uint256 tokens_bought
);
event AddLiquidity(
address indexed provider,
uint256[2] token_amounts,
uint256[2] fees,
uint256 invariant,
uint256 token_supply
);
event RemoveLiquidity(
address indexed provider,
uint256[2] token_amounts,
uint256[2] fees,
uint256 token_supply
);
event RemoveLiquidityOne(
address indexed provider,
uint256 token_amount,
uint256 coin_amount,
uint256 token_supply
);
event RemoveLiquidityImbalance(
address indexed provider,
uint256[2] token_amounts,
uint256[2] fees,
uint256 invariant,
uint256 token_supply
);
event CommitNewAdmin(uint256 indexed deadline, address indexed admin);
event NewAdmin(address indexed admin);
event CommitNewFee(
uint256 indexed deadline,
uint256 fee,
uint256 admin_fee
);
event NewFee(uint256 fee, uint256 admin_fee);
event RampA(
uint256 old_A,
uint256 new_A,
uint256 initial_time,
uint256 future_time
);
event StopRampA(uint256 A, uint256 t);
function initialize(
string memory _name,
string memory _symbol,
address _coin,
uint256 _decimals,
uint256 _A,
uint256 _fee,
address _admin
) external;
function decimals() external view returns (uint256);
function transfer(address _to, uint256 _value) external returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value
) external returns (bool);
function approve(address _spender, uint256 _value) external returns (bool);
function get_previous_balances() external view returns (uint256[2] memory);
function get_balances() external view returns (uint256[2] memory);
function get_twap_balances(
uint256[2] memory _first_balances,
uint256[2] memory _last_balances,
uint256 _time_elapsed
) external view returns (uint256[2] memory);
function get_price_cumulative_last()
external
view
returns (uint256[2] memory);
function admin_fee() external view returns (uint256);
function A() external view returns (uint256);
function A_precise() external view returns (uint256);
function get_virtual_price() external view returns (uint256);
function calc_token_amount(uint256[2] memory _amounts, bool _is_deposit)
external
view
returns (uint256);
function calc_token_amount(
uint256[2] memory _amounts,
bool _is_deposit,
bool _previous
) external view returns (uint256);
function add_liquidity(uint256[2] memory _amounts, uint256 _min_mint_amount)
external
returns (uint256);
function add_liquidity(
uint256[2] memory _amounts,
uint256 _min_mint_amount,
address _receiver
) external returns (uint256);
function get_dy(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function get_dy(
int128 i,
int128 j,
uint256 dx,
uint256[2] memory _balances
) external view returns (uint256);
function get_dy_underlying(
int128 i,
int128 j,
uint256 dx
) external view returns (uint256);
function get_dy_underlying(
int128 i,
int128 j,
uint256 dx,
uint256[2] memory _balances
) external view returns (uint256);
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external returns (uint256);
function exchange(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy,
address _receiver
) external returns (uint256);
function exchange_underlying(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy
) external returns (uint256);
function exchange_underlying(
int128 i,
int128 j,
uint256 dx,
uint256 min_dy,
address _receiver
) external returns (uint256);
function remove_liquidity(
uint256 _burn_amount,
uint256[2] memory _min_amounts
) external returns (uint256[2] memory);
function remove_liquidity(
uint256 _burn_amount,
uint256[2] memory _min_amounts,
address _receiver
) external returns (uint256[2] memory);
function remove_liquidity_imbalance(
uint256[2] memory _amounts,
uint256 _max_burn_amount
) external returns (uint256);
function remove_liquidity_imbalance(
uint256[2] memory _amounts,
uint256 _max_burn_amount,
address _receiver
) external returns (uint256);
function calc_withdraw_one_coin(uint256 _burn_amount, int128 i)
external
view
returns (uint256);
function calc_withdraw_one_coin(
uint256 _burn_amount,
int128 i,
bool _previous
) external view returns (uint256);
function remove_liquidity_one_coin(
uint256 _burn_amount,
int128 i,
uint256 _min_received
) external returns (uint256);
function remove_liquidity_one_coin(
uint256 _burn_amount,
int128 i,
uint256 _min_received,
address _receiver
) external returns (uint256);
function ramp_A(uint256 _future_A, uint256 _future_time) external;
function stop_ramp_A() external;
function admin_balances(uint256 i) external view returns (uint256);
function withdraw_admin_fees() external;
function admin() external view returns (address);
function coins(uint256 arg0) external view returns (address);
function balances(uint256 arg0) external view returns (uint256);
function fee() external view returns (uint256);
function block_timestamp_last() external view returns (uint256);
function initial_A() external view returns (uint256);
function future_A() external view returns (uint256);
function initial_A_time() external view returns (uint256);
function future_A_time() external view returns (uint256);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function balanceOf(address arg0) external view returns (uint256);
function allowance(address arg0, address arg1)
external
view
returns (uint256);
function totalSupply() external view returns (uint256);
}
// SPDX-License-Identifier: Apache-2.0
pragma solidity ^0.8.3;
import "./interfaces/IMetaPool.sol";
contract TWAPOracle {
address public immutable pool;
address public immutable token0;
address public immutable token1;
uint256 public price0Average;
uint256 public price1Average;
uint256 public pricesBlockTimestampLast;
uint256[2] public priceCumulativeLast;
constructor(
address _pool,
address _uADtoken0,
address _curve3CRVtoken1
) {
pool = _pool;
// coin at index 0 is uAD and index 1 is 3CRV
require(
IMetaPool(_pool).coins(0) == _uADtoken0 &&
IMetaPool(_pool).coins(1) == _curve3CRVtoken1,
"TWAPOracle: COIN_ORDER_MISMATCH"
);
token0 = _uADtoken0;
token1 = _curve3CRVtoken1;
uint256 _reserve0 = uint112(IMetaPool(_pool).balances(0));
uint256 _reserve1 = uint112(IMetaPool(_pool).balances(1));
// ensure that there's liquidity in the pair
require(_reserve0 != 0 && _reserve1 != 0, "TWAPOracle: NO_RESERVES");
// ensure that pair balance is perfect
require(_reserve0 == _reserve1, "TWAPOracle: PAIR_UNBALANCED");
priceCumulativeLast = IMetaPool(_pool).get_price_cumulative_last();
pricesBlockTimestampLast = IMetaPool(_pool).block_timestamp_last();
price0Average = 1 ether;
price1Average = 1 ether;
}
// calculate average price
function update() external {
(uint256[2] memory priceCumulative, uint256 blockTimestamp) =
_currentCumulativePrices();
if (blockTimestamp - pricesBlockTimestampLast > 0) {
// get the balances between now and the last price cumulative snapshot
uint256[2] memory twapBalances =
IMetaPool(pool).get_twap_balances(
priceCumulativeLast,
priceCumulative,
blockTimestamp - pricesBlockTimestampLast
);
// price to exchange amounIn uAD to 3CRV based on TWAP
price0Average = IMetaPool(pool).get_dy(0, 1, 1 ether, twapBalances);
// price to exchange amounIn 3CRV to uAD based on TWAP
price1Average = IMetaPool(pool).get_dy(1, 0, 1 ether, twapBalances);
// we update the priceCumulative
priceCumulativeLast = priceCumulative;
pricesBlockTimestampLast = blockTimestamp;
}
}
// note this will always return 0 before update has been called successfully
// for the first time.
function consult(address token) external view returns (uint256 amountOut) {
if (token == token0) {
// price to exchange 1 uAD to 3CRV based on TWAP
amountOut = price0Average;
} else {
require(token == token1, "TWAPOracle: INVALID_TOKEN");
// price to exchange 1 3CRV to uAD based on TWAP
amountOut = price1Average;
}
}
function _currentCumulativePrices()
internal
view
returns (uint256[2] memory priceCumulative, uint256 blockTimestamp)
{
priceCumulative = IMetaPool(pool).get_price_cumulative_last();
blockTimestamp = IMetaPool(pool).block_timestamp_last();
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant alphabet = "0123456789abcdef";
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
// Inspired by OraclizeAPI's implementation - MIT licence
// https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol
if (value == 0) {
return "0";
}
uint256 temp = value;
uint256 digits;
while (temp != 0) {
digits++;
temp /= 10;
}
bytes memory buffer = new bytes(digits);
while (value != 0) {
digits -= 1;
buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
value /= 10;
}
return string(buffer);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
if (value == 0) {
return "0x00";
}
uint256 temp = value;
uint256 length = 0;
while (temp != 0) {
length++;
temp >>= 8;
}
return toHexString(value, length);
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = alphabet[value & 0xf];
value >>= 4;
}
require(value == 0, "Strings: hex length insufficient");
return string(buffer);
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*
* Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
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);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}