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ContractCreator
TokenTracker
Latest 25 from a total of 119 transactions
| Transaction Hash |
|
Block
|
From
|
To
|
|||||
|---|---|---|---|---|---|---|---|---|---|
| Approve | 266887231 | 464 days ago | IN | 0 ETH | 0.0000021 | ||||
| Withdraw | 163320998 | 768 days ago | IN | 0 ETH | 0.00005829 | ||||
| Withdraw | 153816111 | 798 days ago | IN | 0 ETH | 0.00006048 | ||||
| Deposit | 153815876 | 798 days ago | IN | 0 ETH | 0.0000942 | ||||
| Withdraw | 152392656 | 802 days ago | IN | 0 ETH | 0.00007577 | ||||
| Approve | 152391881 | 802 days ago | IN | 0 ETH | 0.0000633 | ||||
| Deposit | 152391373 | 802 days ago | IN | 0 ETH | 0.00013729 | ||||
| Withdraw | 151710859 | 804 days ago | IN | 0 ETH | 0.00008732 | ||||
| Withdraw | 151709401 | 804 days ago | IN | 0 ETH | 0.0000819 | ||||
| Withdraw | 151649509 | 804 days ago | IN | 0 ETH | 0.00005504 | ||||
| Approve | 151447500 | 805 days ago | IN | 0 ETH | 0.0000491 | ||||
| Approve | 151447413 | 805 days ago | IN | 0 ETH | 0.0000491 | ||||
| Deposit | 151447093 | 805 days ago | IN | 0 ETH | 0.00010773 | ||||
| Withdraw | 151422758 | 805 days ago | IN | 0 ETH | 0.00007535 | ||||
| Approve | 151421395 | 805 days ago | IN | 0 ETH | 0.00007647 | ||||
| Deposit | 151421187 | 805 days ago | IN | 0 ETH | 0.00014204 | ||||
| Withdraw | 151420942 | 805 days ago | IN | 0 ETH | 0.00008846 | ||||
| Deposit | 151420099 | 805 days ago | IN | 0 ETH | 0.00012197 | ||||
| Withdraw | 151374371 | 805 days ago | IN | 0 ETH | 0.00012936 | ||||
| Withdraw | 142746238 | 832 days ago | IN | 0 ETH | 0.00003497 | ||||
| Withdraw | 142444517 | 833 days ago | IN | 0 ETH | 0.00003863 | ||||
| Approve | 142129273 | 834 days ago | IN | 0 ETH | 0.00003056 | ||||
| Withdraw | 142129243 | 834 days ago | IN | 0 ETH | 0.00004302 | ||||
| Deposit | 142129166 | 834 days ago | IN | 0 ETH | 0.00006328 | ||||
| Withdraw | 141083952 | 838 days ago | IN | 0 ETH | 0.00003671 |
Latest 9 internal transactions
Cross-Chain Transactions
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Contract Name:
Curve
Compiler Version
v0.8.17+commit.8df45f5f
Contract Source Code (Solidity)
/**
*Submitted for verification at Arbiscan.io on 2023-04-27
*/
// SPDX-License-Identifier: MIT
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity ^0.8.13;
pragma experimental ABIEncoderV2;
interface IFlashCallback {
function flashCallback(
uint256 fee0,
uint256 fee1,
bytes calldata data
) external;
}
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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);
}
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
/**
* @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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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://consensys.net/diligence/blog/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");
(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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
/**
* @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'
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));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/*
* ABDK Math 64.64 Smart Contract Library. Copyright © 2019 by ABDK Consulting.
* Author: Mikhail Vladimirov <[email protected]>
*/
/**
* Smart contract library of mathematical functions operating with signed
* 64.64-bit fixed point numbers. Signed 64.64-bit fixed point number is
* basically a simple fraction whose numerator is signed 128-bit integer and
* denominator is 2^64. As long as denominator is always the same, there is no
* need to store it, thus in Solidity signed 64.64-bit fixed point numbers are
* represented by int128 type holding only the numerator.
*/
library ABDKMath64x64 {
/*
* Minimum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MIN_64x64 = -0x80000000000000000000000000000000;
/*
* Maximum value signed 64.64-bit fixed point number may have.
*/
int128 private constant MAX_64x64 = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF;
/**
* Convert signed 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromInt (int256 x) internal pure returns (int128) {
unchecked {
require (x >= -0x8000000000000000 && x <= 0x7FFFFFFFFFFFFFFF);
return int128 (x << 64);
}
}
/**
* Convert signed 64.64 fixed point number into signed 64-bit integer number
* rounding down.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64-bit integer number
*/
function toInt (int128 x) internal pure returns (int64) {
unchecked {
return int64 (x >> 64);
}
}
/**
* Convert unsigned 256-bit integer number into signed 64.64-bit fixed point
* number. Revert on overflow.
*
* @param x unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function fromUInt (uint256 x) internal pure returns (int128) {
unchecked {
require (x <= 0x7FFFFFFFFFFFFFFF);
return int128 (int256 (x << 64));
}
}
/**
* Convert signed 64.64 fixed point number into unsigned 64-bit integer
* number rounding down. Revert on underflow.
*
* @param x signed 64.64-bit fixed point number
* @return unsigned 64-bit integer number
*/
function toUInt (int128 x) internal pure returns (uint64) {
unchecked {
require (x >= 0);
return uint64 (uint128 (x >> 64));
}
}
/**
* Convert signed 128.128 fixed point number into signed 64.64-bit fixed point
* number rounding down. Revert on overflow.
*
* @param x signed 128.128-bin fixed point number
* @return signed 64.64-bit fixed point number
*/
function from128x128 (int256 x) internal pure returns (int128) {
unchecked {
int256 result = x >> 64;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Convert signed 64.64 fixed point number into signed 128.128 fixed point
* number.
*
* @param x signed 64.64-bit fixed point number
* @return signed 128.128 fixed point number
*/
function to128x128 (int128 x) internal pure returns (int256) {
unchecked {
return int256 (x) << 64;
}
}
/**
* Calculate x + y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function add (int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = int256(x) + y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate x - y. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sub (int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = int256(x) - y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate x * y rounding down. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function mul (int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 result = int256(x) * y >> 64;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate x * y rounding towards zero, where x is signed 64.64 fixed point
* number and y is signed 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y signed 256-bit integer number
* @return signed 256-bit integer number
*/
function muli (int128 x, int256 y) internal pure returns (int256) {
unchecked {
if (x == MIN_64x64) {
require (y >= -0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF &&
y <= 0x1000000000000000000000000000000000000000000000000);
return -y << 63;
} else {
bool negativeResult = false;
if (x < 0) {
x = -x;
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint256 absoluteResult = mulu (x, uint256 (y));
if (negativeResult) {
require (absoluteResult <=
0x8000000000000000000000000000000000000000000000000000000000000000);
return -int256 (absoluteResult); // We rely on overflow behavior here
} else {
require (absoluteResult <=
0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int256 (absoluteResult);
}
}
}
}
/**
* Calculate x * y rounding down, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64 fixed point number
* @param y unsigned 256-bit integer number
* @return unsigned 256-bit integer number
*/
function mulu (int128 x, uint256 y) internal pure returns (uint256) {
unchecked {
if (y == 0) return 0;
require (x >= 0);
uint256 lo = (uint256 (int256 (x)) * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)) >> 64;
uint256 hi = uint256 (int256 (x)) * (y >> 128);
require (hi <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
hi <<= 64;
require (hi <=
0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF - lo);
return hi + lo;
}
}
/**
* Calculate x / y rounding towards zero. Revert on overflow or when y is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function div (int128 x, int128 y) internal pure returns (int128) {
unchecked {
require (y != 0);
int256 result = (int256 (x) << 64) / y;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate x / y rounding towards zero, where x and y are signed 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x signed 256-bit integer number
* @param y signed 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divi (int256 x, int256 y) internal pure returns (int128) {
unchecked {
require (y != 0);
bool negativeResult = false;
if (x < 0) {
x = -x; // We rely on overflow behavior here
negativeResult = true;
}
if (y < 0) {
y = -y; // We rely on overflow behavior here
negativeResult = !negativeResult;
}
uint128 absoluteResult = divuu (uint256 (x), uint256 (y));
if (negativeResult) {
require (absoluteResult <= 0x80000000000000000000000000000000);
return -int128 (absoluteResult); // We rely on overflow behavior here
} else {
require (absoluteResult <= 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return int128 (absoluteResult); // We rely on overflow behavior here
}
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return signed 64.64-bit fixed point number
*/
function divu (uint256 x, uint256 y) internal pure returns (int128) {
unchecked {
require (y != 0);
uint128 result = divuu (x, y);
require (result <= uint128 (MAX_64x64));
return int128 (result);
}
}
/**
* Calculate -x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function neg (int128 x) internal pure returns (int128) {
unchecked {
require (x != MIN_64x64);
return -x;
}
}
/**
* Calculate |x|. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function abs (int128 x) internal pure returns (int128) {
unchecked {
require (x != MIN_64x64);
return x < 0 ? -x : x;
}
}
/**
* Calculate 1 / x rounding towards zero. Revert on overflow or when x is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function inv (int128 x) internal pure returns (int128) {
unchecked {
require (x != 0);
int256 result = int256 (0x100000000000000000000000000000000) / x;
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate arithmetics average of x and y, i.e. (x + y) / 2 rounding down.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function avg (int128 x, int128 y) internal pure returns (int128) {
unchecked {
return int128 ((int256 (x) + int256 (y)) >> 1);
}
}
/**
* Calculate geometric average of x and y, i.e. sqrt (x * y) rounding down.
* Revert on overflow or in case x * y is negative.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function gavg (int128 x, int128 y) internal pure returns (int128) {
unchecked {
int256 m = int256 (x) * int256 (y);
require (m >= 0);
require (m <
0x4000000000000000000000000000000000000000000000000000000000000000);
return int128 (sqrtu (uint256 (m)));
}
}
/**
* Calculate x^y assuming 0^0 is 1, where x is signed 64.64 fixed point number
* and y is unsigned 256-bit integer number. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @param y uint256 value
* @return signed 64.64-bit fixed point number
*/
function pow (int128 x, uint256 y) internal pure returns (int128) {
unchecked {
bool negative = x < 0 && y & 1 == 1;
uint256 absX = uint128 (x < 0 ? -x : x);
uint256 absResult;
absResult = 0x100000000000000000000000000000000;
if (absX <= 0x10000000000000000) {
absX <<= 63;
while (y != 0) {
if (y & 0x1 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x2 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x4 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
if (y & 0x8 != 0) {
absResult = absResult * absX >> 127;
}
absX = absX * absX >> 127;
y >>= 4;
}
absResult >>= 64;
} else {
uint256 absXShift = 63;
if (absX < 0x1000000000000000000000000) { absX <<= 32; absXShift -= 32; }
if (absX < 0x10000000000000000000000000000) { absX <<= 16; absXShift -= 16; }
if (absX < 0x1000000000000000000000000000000) { absX <<= 8; absXShift -= 8; }
if (absX < 0x10000000000000000000000000000000) { absX <<= 4; absXShift -= 4; }
if (absX < 0x40000000000000000000000000000000) { absX <<= 2; absXShift -= 2; }
if (absX < 0x80000000000000000000000000000000) { absX <<= 1; absXShift -= 1; }
uint256 resultShift = 0;
while (y != 0) {
require (absXShift < 64);
if (y & 0x1 != 0) {
absResult = absResult * absX >> 127;
resultShift += absXShift;
if (absResult > 0x100000000000000000000000000000000) {
absResult >>= 1;
resultShift += 1;
}
}
absX = absX * absX >> 127;
absXShift <<= 1;
if (absX >= 0x100000000000000000000000000000000) {
absX >>= 1;
absXShift += 1;
}
y >>= 1;
}
require (resultShift < 64);
absResult >>= 64 - resultShift;
}
int256 result = negative ? -int256 (absResult) : int256 (absResult);
require (result >= MIN_64x64 && result <= MAX_64x64);
return int128 (result);
}
}
/**
* Calculate sqrt (x) rounding down. Revert if x < 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function sqrt (int128 x) internal pure returns (int128) {
unchecked {
require (x >= 0);
return int128 (sqrtu (uint256 (int256 (x)) << 64));
}
}
/**
* Calculate binary logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function log_2 (int128 x) internal pure returns (int128) {
unchecked {
require (x > 0);
int256 msb = 0;
int256 xc = x;
if (xc >= 0x10000000000000000) { xc >>= 64; msb += 64; }
if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
if (xc >= 0x10000) { xc >>= 16; msb += 16; }
if (xc >= 0x100) { xc >>= 8; msb += 8; }
if (xc >= 0x10) { xc >>= 4; msb += 4; }
if (xc >= 0x4) { xc >>= 2; msb += 2; }
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
int256 result = msb - 64 << 64;
uint256 ux = uint256 (int256 (x)) << uint256 (127 - msb);
for (int256 bit = 0x8000000000000000; bit > 0; bit >>= 1) {
ux *= ux;
uint256 b = ux >> 255;
ux >>= 127 + b;
result += bit * int256 (b);
}
return int128 (result);
}
}
/**
* Calculate natural logarithm of x. Revert if x <= 0.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function ln (int128 x) internal pure returns (int128) {
unchecked {
require (x > 0);
return int128 (int256 (
uint256 (int256 (log_2 (x))) * 0xB17217F7D1CF79ABC9E3B39803F2F6AF >> 128));
}
}
/**
* Calculate binary exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp_2 (int128 x) internal pure returns (int128) {
unchecked {
require (x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
uint256 result = 0x80000000000000000000000000000000;
if (x & 0x8000000000000000 > 0)
result = result * 0x16A09E667F3BCC908B2FB1366EA957D3E >> 128;
if (x & 0x4000000000000000 > 0)
result = result * 0x1306FE0A31B7152DE8D5A46305C85EDEC >> 128;
if (x & 0x2000000000000000 > 0)
result = result * 0x1172B83C7D517ADCDF7C8C50EB14A791F >> 128;
if (x & 0x1000000000000000 > 0)
result = result * 0x10B5586CF9890F6298B92B71842A98363 >> 128;
if (x & 0x800000000000000 > 0)
result = result * 0x1059B0D31585743AE7C548EB68CA417FD >> 128;
if (x & 0x400000000000000 > 0)
result = result * 0x102C9A3E778060EE6F7CACA4F7A29BDE8 >> 128;
if (x & 0x200000000000000 > 0)
result = result * 0x10163DA9FB33356D84A66AE336DCDFA3F >> 128;
if (x & 0x100000000000000 > 0)
result = result * 0x100B1AFA5ABCBED6129AB13EC11DC9543 >> 128;
if (x & 0x80000000000000 > 0)
result = result * 0x10058C86DA1C09EA1FF19D294CF2F679B >> 128;
if (x & 0x40000000000000 > 0)
result = result * 0x1002C605E2E8CEC506D21BFC89A23A00F >> 128;
if (x & 0x20000000000000 > 0)
result = result * 0x100162F3904051FA128BCA9C55C31E5DF >> 128;
if (x & 0x10000000000000 > 0)
result = result * 0x1000B175EFFDC76BA38E31671CA939725 >> 128;
if (x & 0x8000000000000 > 0)
result = result * 0x100058BA01FB9F96D6CACD4B180917C3D >> 128;
if (x & 0x4000000000000 > 0)
result = result * 0x10002C5CC37DA9491D0985C348C68E7B3 >> 128;
if (x & 0x2000000000000 > 0)
result = result * 0x1000162E525EE054754457D5995292026 >> 128;
if (x & 0x1000000000000 > 0)
result = result * 0x10000B17255775C040618BF4A4ADE83FC >> 128;
if (x & 0x800000000000 > 0)
result = result * 0x1000058B91B5BC9AE2EED81E9B7D4CFAB >> 128;
if (x & 0x400000000000 > 0)
result = result * 0x100002C5C89D5EC6CA4D7C8ACC017B7C9 >> 128;
if (x & 0x200000000000 > 0)
result = result * 0x10000162E43F4F831060E02D839A9D16D >> 128;
if (x & 0x100000000000 > 0)
result = result * 0x100000B1721BCFC99D9F890EA06911763 >> 128;
if (x & 0x80000000000 > 0)
result = result * 0x10000058B90CF1E6D97F9CA14DBCC1628 >> 128;
if (x & 0x40000000000 > 0)
result = result * 0x1000002C5C863B73F016468F6BAC5CA2B >> 128;
if (x & 0x20000000000 > 0)
result = result * 0x100000162E430E5A18F6119E3C02282A5 >> 128;
if (x & 0x10000000000 > 0)
result = result * 0x1000000B1721835514B86E6D96EFD1BFE >> 128;
if (x & 0x8000000000 > 0)
result = result * 0x100000058B90C0B48C6BE5DF846C5B2EF >> 128;
if (x & 0x4000000000 > 0)
result = result * 0x10000002C5C8601CC6B9E94213C72737A >> 128;
if (x & 0x2000000000 > 0)
result = result * 0x1000000162E42FFF037DF38AA2B219F06 >> 128;
if (x & 0x1000000000 > 0)
result = result * 0x10000000B17217FBA9C739AA5819F44F9 >> 128;
if (x & 0x800000000 > 0)
result = result * 0x1000000058B90BFCDEE5ACD3C1CEDC823 >> 128;
if (x & 0x400000000 > 0)
result = result * 0x100000002C5C85FE31F35A6A30DA1BE50 >> 128;
if (x & 0x200000000 > 0)
result = result * 0x10000000162E42FF0999CE3541B9FFFCF >> 128;
if (x & 0x100000000 > 0)
result = result * 0x100000000B17217F80F4EF5AADDA45554 >> 128;
if (x & 0x80000000 > 0)
result = result * 0x10000000058B90BFBF8479BD5A81B51AD >> 128;
if (x & 0x40000000 > 0)
result = result * 0x1000000002C5C85FDF84BD62AE30A74CC >> 128;
if (x & 0x20000000 > 0)
result = result * 0x100000000162E42FEFB2FED257559BDAA >> 128;
if (x & 0x10000000 > 0)
result = result * 0x1000000000B17217F7D5A7716BBA4A9AE >> 128;
if (x & 0x8000000 > 0)
result = result * 0x100000000058B90BFBE9DDBAC5E109CCE >> 128;
if (x & 0x4000000 > 0)
result = result * 0x10000000002C5C85FDF4B15DE6F17EB0D >> 128;
if (x & 0x2000000 > 0)
result = result * 0x1000000000162E42FEFA494F1478FDE05 >> 128;
if (x & 0x1000000 > 0)
result = result * 0x10000000000B17217F7D20CF927C8E94C >> 128;
if (x & 0x800000 > 0)
result = result * 0x1000000000058B90BFBE8F71CB4E4B33D >> 128;
if (x & 0x400000 > 0)
result = result * 0x100000000002C5C85FDF477B662B26945 >> 128;
if (x & 0x200000 > 0)
result = result * 0x10000000000162E42FEFA3AE53369388C >> 128;
if (x & 0x100000 > 0)
result = result * 0x100000000000B17217F7D1D351A389D40 >> 128;
if (x & 0x80000 > 0)
result = result * 0x10000000000058B90BFBE8E8B2D3D4EDE >> 128;
if (x & 0x40000 > 0)
result = result * 0x1000000000002C5C85FDF4741BEA6E77E >> 128;
if (x & 0x20000 > 0)
result = result * 0x100000000000162E42FEFA39FE95583C2 >> 128;
if (x & 0x10000 > 0)
result = result * 0x1000000000000B17217F7D1CFB72B45E1 >> 128;
if (x & 0x8000 > 0)
result = result * 0x100000000000058B90BFBE8E7CC35C3F0 >> 128;
if (x & 0x4000 > 0)
result = result * 0x10000000000002C5C85FDF473E242EA38 >> 128;
if (x & 0x2000 > 0)
result = result * 0x1000000000000162E42FEFA39F02B772C >> 128;
if (x & 0x1000 > 0)
result = result * 0x10000000000000B17217F7D1CF7D83C1A >> 128;
if (x & 0x800 > 0)
result = result * 0x1000000000000058B90BFBE8E7BDCBE2E >> 128;
if (x & 0x400 > 0)
result = result * 0x100000000000002C5C85FDF473DEA871F >> 128;
if (x & 0x200 > 0)
result = result * 0x10000000000000162E42FEFA39EF44D91 >> 128;
if (x & 0x100 > 0)
result = result * 0x100000000000000B17217F7D1CF79E949 >> 128;
if (x & 0x80 > 0)
result = result * 0x10000000000000058B90BFBE8E7BCE544 >> 128;
if (x & 0x40 > 0)
result = result * 0x1000000000000002C5C85FDF473DE6ECA >> 128;
if (x & 0x20 > 0)
result = result * 0x100000000000000162E42FEFA39EF366F >> 128;
if (x & 0x10 > 0)
result = result * 0x1000000000000000B17217F7D1CF79AFA >> 128;
if (x & 0x8 > 0)
result = result * 0x100000000000000058B90BFBE8E7BCD6D >> 128;
if (x & 0x4 > 0)
result = result * 0x10000000000000002C5C85FDF473DE6B2 >> 128;
if (x & 0x2 > 0)
result = result * 0x1000000000000000162E42FEFA39EF358 >> 128;
if (x & 0x1 > 0)
result = result * 0x10000000000000000B17217F7D1CF79AB >> 128;
result >>= uint256 (int256 (63 - (x >> 64)));
require (result <= uint256 (int256 (MAX_64x64)));
return int128 (int256 (result));
}
}
/**
* Calculate natural exponent of x. Revert on overflow.
*
* @param x signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function exp (int128 x) internal pure returns (int128) {
unchecked {
require (x < 0x400000000000000000); // Overflow
if (x < -0x400000000000000000) return 0; // Underflow
return exp_2 (
int128 (int256 (x) * 0x171547652B82FE1777D0FFDA0D23A7D12 >> 128));
}
}
/**
* Calculate x / y rounding towards zero, where x and y are unsigned 256-bit
* integer numbers. Revert on overflow or when y is zero.
*
* @param x unsigned 256-bit integer number
* @param y unsigned 256-bit integer number
* @return unsigned 64.64-bit fixed point number
*/
function divuu (uint256 x, uint256 y) private pure returns (uint128) {
unchecked {
require (y != 0);
uint256 result;
if (x <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)
result = (x << 64) / y;
else {
uint256 msb = 192;
uint256 xc = x >> 192;
if (xc >= 0x100000000) { xc >>= 32; msb += 32; }
if (xc >= 0x10000) { xc >>= 16; msb += 16; }
if (xc >= 0x100) { xc >>= 8; msb += 8; }
if (xc >= 0x10) { xc >>= 4; msb += 4; }
if (xc >= 0x4) { xc >>= 2; msb += 2; }
if (xc >= 0x2) msb += 1; // No need to shift xc anymore
result = (x << 255 - msb) / ((y - 1 >> msb - 191) + 1);
require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 hi = result * (y >> 128);
uint256 lo = result * (y & 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
uint256 xh = x >> 192;
uint256 xl = x << 64;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
lo = hi << 128;
if (xl < lo) xh -= 1;
xl -= lo; // We rely on overflow behavior here
assert (xh == hi >> 128);
result += xl / y;
}
require (result <= 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
return uint128 (result);
}
}
/**
* Calculate sqrt (x) rounding down, where x is unsigned 256-bit integer
* number.
*
* @param x unsigned 256-bit integer number
* @return unsigned 128-bit integer number
*/
function sqrtu (uint256 x) private pure returns (uint128) {
unchecked {
if (x == 0) return 0;
else {
uint256 xx = x;
uint256 r = 1;
if (xx >= 0x100000000000000000000000000000000) { xx >>= 128; r <<= 64; }
if (xx >= 0x10000000000000000) { xx >>= 64; r <<= 32; }
if (xx >= 0x100000000) { xx >>= 32; r <<= 16; }
if (xx >= 0x10000) { xx >>= 16; r <<= 8; }
if (xx >= 0x100) { xx >>= 8; r <<= 4; }
if (xx >= 0x10) { xx >>= 4; r <<= 2; }
if (xx >= 0x8) { r <<= 1; }
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1;
r = (r + x / r) >> 1; // Seven iterations should be enough
uint256 r1 = x / r;
return uint128 (r < r1 ? r : r1);
}
}
}
}
/// @title Contains 512-bit math functions
/// @notice Facilitates multiplication and division that can have overflow of an intermediate value without any loss of precision
/// @dev Handles "phantom overflow" i.e., allows multiplication and division where an intermediate value overflows 256 bits
library FullMath {
/// @notice Calculates floor(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
/// @dev Credit to Remco Bloemen under MIT license https://xn--2-umb.com/21/muldiv
function mulDiv(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
// 512-bit multiply [prod1 prod0] = a * b
// Compute the product mod 2**256 and mod 2**256 - 1
// then use the Chinese Remainder Theorem to reconstruct
// the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2**256 + prod0
uint256 prod0; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(a, b, not(0))
prod0 := mul(a, b)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division
if (prod1 == 0) {
require(denominator > 0);
assembly {
result := div(prod0, denominator)
}
return result;
}
// Make sure the result is less than 2**256.
// Also prevents denominator == 0
require(denominator > prod1);
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0]
// Compute remainder using mulmod
uint256 remainder;
assembly {
remainder := mulmod(a, b, denominator)
}
// Subtract 256 bit number from 512 bit number
assembly {
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator
// Compute largest power of two divisor of denominator.
// Always >= 1.
uint256 twos = denominator & (~denominator + 1);
// Divide denominator by power of two
assembly {
denominator := div(denominator, twos)
}
// Divide [prod1 prod0] by the factors of two
assembly {
prod0 := div(prod0, twos)
}
// Shift in bits from prod1 into prod0. For this we need
// to flip `twos` such that it is 2**256 / twos.
// If twos is zero, then it becomes one
assembly {
twos := add(div(sub(0, twos), twos), 1)
}
prod0 |= prod1 * twos;
// Invert denominator mod 2**256
// Now that denominator is an odd number, it has an inverse
// modulo 2**256 such that denominator * inv = 1 mod 2**256.
// Compute the inverse by starting with a seed that is correct
// correct for four bits. That is, denominator * inv = 1 mod 2**4
uint256 inv = (3 * denominator) ^ 2;
// Now use Newton-Raphson iteration to improve the precision.
// Thanks to Hensel's lifting lemma, this also works in modular
// arithmetic, doubling the correct bits in each step.
inv *= 2 - denominator * inv; // inverse mod 2**8
inv *= 2 - denominator * inv; // inverse mod 2**16
inv *= 2 - denominator * inv; // inverse mod 2**32
inv *= 2 - denominator * inv; // inverse mod 2**64
inv *= 2 - denominator * inv; // inverse mod 2**128
inv *= 2 - denominator * inv; // inverse mod 2**256
// Because the division is now exact we can divide by multiplying
// with the modular inverse of denominator. This will give us the
// correct result modulo 2**256. Since the precoditions guarantee
// that the outcome is less than 2**256, this is the final result.
// We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inv;
return result;
}
/// @notice Calculates ceil(a×b÷denominator) with full precision. Throws if result overflows a uint256 or denominator == 0
/// @param a The multiplicand
/// @param b The multiplier
/// @param denominator The divisor
/// @return result The 256-bit result
function mulDivRoundingUp(
uint256 a,
uint256 b,
uint256 denominator
) internal pure returns (uint256 result) {
result = mulDiv(a, b, denominator);
if (mulmod(a, b, denominator) > 0) {
require(result < type(uint256).max);
result++;
}
}
}
/// @title Prevents delegatecall to a contract
/// @notice Base contract that provides a modifier for preventing delegatecall to methods in a child contract
abstract contract NoDelegateCall {
/// @dev The original address of this contract
address private immutable original;
constructor() {
// Immutables are computed in the init code of the contract, and then inlined into the deployed bytecode.
// In other words, this variable won't change when it's checked at runtime.
original = address(this);
}
/// @dev Private method is used instead of inlining into modifier because modifiers are copied into each method,
/// and the use of immutable means the address bytes are copied in every place the modifier is used.
function checkNotDelegateCall() private view {
require(address(this) == original);
}
/// @notice Prevents delegatecall into the modified method
modifier noDelegateCall() {
checkNotDelegateCall();
_;
}
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.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);
}
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/**
* @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;
}
}
/**
* @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.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* The default value of {decimals} is 18. To change this, you should override
* this function so it returns a different value.
*
* 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}.
*
* 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 default value returned by this function, unless
* it's 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, allowance(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 = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* 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;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_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;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_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;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_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 Updates `owner` s allowance for `spender` based on spent `amount`.
*
* 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 {}
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
interface IOracle {
function acceptOwnership() external;
function accessController() external view returns (address);
function aggregator() external view returns (address);
function confirmAggregator(address _aggregator) external;
function decimals() external view returns (uint8);
function description() external view returns (string memory);
function getAnswer(uint256 _roundId) external view returns (int256);
function getRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function getTimestamp(uint256 _roundId) external view returns (uint256);
function latestAnswer() external view returns (int256);
function latestRound() external view returns (uint256);
function latestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function latestTimestamp() external view returns (uint256);
function owner() external view returns (address);
function phaseAggregators(uint16) external view returns (address);
function phaseId() external view returns (uint16);
function proposeAggregator(address _aggregator) external;
function proposedAggregator() external view returns (address);
function proposedGetRoundData(uint80 _roundId)
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function proposedLatestRoundData()
external
view
returns (
uint80 roundId,
int256 answer,
uint256 startedAt,
uint256 updatedAt,
uint80 answeredInRound
);
function setController(address _accessController) external;
function transferOwnership(address _to) external;
function version() external view returns (uint256);
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
interface IAssimilator {
function oracleDecimals() external view returns(uint256);
function tokenDecimals() external view returns(uint256);
function getRate() external view returns (uint256);
function intakeRaw(uint256 amount) external returns (int128);
function intakeRawAndGetBalance(uint256 amount)
external
returns (int128, int128);
function intakeNumeraire(int128 amount) external returns (uint256);
function intakeNumeraireLPRatio(
uint256,
uint256,
uint256,
uint256,
uint256,
uint256,
address,
int128
) external returns (uint256);
function outputRaw(address dst, uint256 amount) external returns (int128);
function outputRawAndGetBalance(address dst, uint256 amount)
external
returns (int128, int128);
function outputNumeraire(address dst, int128 amount)
external
returns (uint256);
function viewRawAmount(int128) external view returns (uint256);
function viewRawAmountLPRatio(
uint256,
uint256,
address,
int128
) external view returns (uint256);
function viewNumeraireAmount(uint256) external view returns (int128);
function viewNumeraireBalanceLPRatio(
uint256,
uint256,
address
) external view returns (int128);
function viewNumeraireBalance(address) external view returns (int128);
function viewNumeraireAmountAndBalance(address, uint256)
external
view
returns (int128, int128);
function transferFee(int128, address) external;
}
interface ICurveFactory {
function getProtocolFee() external view returns (int128);
function getProtocolTreasury() external view returns (address);
function getGlobalFrozenState() external view returns (bool);
function getFlashableState() external view returns (bool);
function isPoolGuarded(address pool) external view returns (bool);
function getPoolGuardAmount(address pool) external view returns (uint256);
function getPoolCap(address pool) external view returns (uint256);
}
struct OriginSwapData {
address _origin;
address _target;
uint256 _originAmount;
address _recipient;
address _curveFactory;
}
struct TargetSwapData {
address _origin;
address _target;
uint256 _targetAmount;
address _recipient;
address _curveFactory;
}
struct SwapInfo {
int128 totalAmount;
int128 totalFee;
int128 amountToUser;
int128 amountToTreasury;
int128 protocolFeePercentage;
address treasury;
ICurveFactory curveFactory;
}
struct CurveInfo {
string _name;
string _symbol;
address _baseCurrency;
address _quoteCurrency;
uint256 _baseWeight;
uint256 _quoteWeight;
IOracle _baseOracle;
IOracle _quoteOracle;
uint256 _alpha;
uint256 _beta;
uint256 _feeAtHalt;
uint256 _epsilon;
uint256 _lambda;
}
struct DepositData {
uint256 deposits;
uint256 minQuote;
uint256 minBase;
uint256 maxQuote;
uint256 maxBase;
}
struct IntakeNumLpRatioInfo {
uint256 baseWeight;
uint256 minBase;
uint256 maxBase;
uint256 quoteWeight;
uint256 minQuote;
uint256 maxQuote;
int128 amount;
}
library Assimilators {
using ABDKMath64x64 for int128;
using Address for address;
IAssimilator public constant iAsmltr = IAssimilator(address(0));
function delegate(address _callee, bytes memory _data) internal returns (bytes memory) {
require(_callee.isContract(), "Assimilators/callee-is-not-a-contract");
// solhint-disable-next-line
(bool _success, bytes memory returnData_) = _callee.delegatecall(_data);
// solhint-disable-next-line
assembly {
if eq(_success, 0) {
revert(add(returnData_, 0x20), returndatasize())
}
}
return returnData_;
}
function getRate(address _assim) internal view returns (uint256 amount_) {
amount_ = IAssimilator(_assim).getRate();
}
function viewRawAmount(address _assim, int128 _amt) internal view returns (uint256 amount_) {
amount_ = IAssimilator(_assim).viewRawAmount(_amt);
}
function viewRawAmountLPRatio(
address _assim,
uint256 _baseWeight,
uint256 _quoteWeight,
int128 _amount
) internal view returns (uint256 amount_) {
amount_ = IAssimilator(_assim).viewRawAmountLPRatio(_baseWeight, _quoteWeight, address(this), _amount);
}
function viewNumeraireAmount(address _assim, uint256 _amt) internal view returns (int128 amt_) {
amt_ = IAssimilator(_assim).viewNumeraireAmount(_amt);
}
function viewNumeraireAmountAndBalance(address _assim, uint256 _amt)
internal
view
returns (int128 amt_, int128 bal_)
{
(amt_, bal_) = IAssimilator(_assim).viewNumeraireAmountAndBalance(address(this), _amt);
}
function viewNumeraireBalance(address _assim) internal view returns (int128 bal_) {
bal_ = IAssimilator(_assim).viewNumeraireBalance(address(this));
}
function viewNumeraireBalanceLPRatio(
uint256 _baseWeight,
uint256 _quoteWeight,
address _assim
) internal view returns (int128 bal_) {
bal_ = IAssimilator(_assim).viewNumeraireBalanceLPRatio(_baseWeight, _quoteWeight, address(this));
}
function intakeRaw(address _assim, uint256 _amt) internal returns (int128 amt_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.intakeRaw.selector, _amt);
amt_ = abi.decode(delegate(_assim, data), (int128));
}
function intakeRawAndGetBalance(address _assim, uint256 _amt) internal returns (int128 amt_, int128 bal_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.intakeRawAndGetBalance.selector, _amt);
(amt_, bal_) = abi.decode(delegate(_assim, data), (int128, int128));
}
function intakeNumeraire(address _assim, int128 _amt) internal returns (uint256 amt_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.intakeNumeraire.selector, _amt);
amt_ = abi.decode(delegate(_assim, data), (uint256));
}
function intakeNumeraireLPRatio(
address _assim,
IntakeNumLpRatioInfo memory info
) internal returns (uint256 amt_) {
bytes memory data = abi.encodeWithSelector(
iAsmltr.intakeNumeraireLPRatio.selector,
info.baseWeight,
info.minBase,
info.maxBase,
info.quoteWeight,
info.minQuote,
info.maxQuote,
address(this),
// _amount
info.amount
);
amt_ = abi.decode(delegate(_assim, data), (uint256));
}
function outputRaw(
address _assim,
address _dst,
uint256 _amt
) internal returns (int128 amt_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.outputRaw.selector, _dst, _amt);
amt_ = abi.decode(delegate(_assim, data), (int128));
amt_ = amt_.neg();
}
function outputRawAndGetBalance(
address _assim,
address _dst,
uint256 _amt
) internal returns (int128 amt_, int128 bal_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.outputRawAndGetBalance.selector, _dst, _amt);
(amt_, bal_) = abi.decode(delegate(_assim, data), (int128, int128));
amt_ = amt_.neg();
}
function outputNumeraire(
address _assim,
address _dst,
int128 _amt
) internal returns (uint256 amt_) {
bytes memory data = abi.encodeWithSelector(iAsmltr.outputNumeraire.selector, _dst, _amt.abs());
amt_ = abi.decode(delegate(_assim, data), (uint256));
}
function transferFee(
address _assim,
int128 _amt,
address _treasury
) internal {
bytes memory data = abi.encodeWithSelector(iAsmltr.transferFee.selector, _amt, _treasury);
delegate(_assim, data);
}
}
contract Storage {
struct Curve {
// Curve parameters
int128 alpha;
int128 beta;
int128 delta;
int128 epsilon;
int128 lambda;
int128[] weights;
// Assets and their assimilators
Assimilator[] assets;
mapping(address => Assimilator) assimilators;
// Oracles to determine the price
// Note that 0'th index should always be USDC 1e18
// Oracle's pricing should be denominated in Currency/USDC
mapping(address => IOracle) oracles;
// ERC20 Interface
uint256 totalSupply;
mapping(address => uint256) balances;
mapping(address => mapping(address => uint256)) allowances;
}
struct Assimilator {
address addr;
uint8 ix;
}
// Curve parameters
Curve public curve;
// Ownable
address public owner;
string public name;
string public symbol;
uint8 public constant decimals = 18;
address[] public derivatives;
address[] public numeraires;
address[] public reserves;
// Curve operational state
bool public frozen = false;
bool public emergency = false;
bool internal notEntered = true;
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
library UnsafeMath64x64 {
/**
* Calculate x * y rounding down.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function us_mul (int128 x, int128 y) internal pure returns (int128) {
int256 result = int256(x) * y >> 64;
return int128 (result);
}
/**
* Calculate x / y rounding towards zero. Revert on overflow or when y is
* zero.
*
* @param x signed 64.64-bit fixed point number
* @param y signed 64.64-bit fixed point number
* @return signed 64.64-bit fixed point number
*/
function us_div (int128 x, int128 y) internal pure returns (int128) {
int256 result = (int256 (x) << 64) / y;
return int128 (result);
}
}
library CurveMath {
int128 private constant ONE = 0x10000000000000000;
int128 private constant MAX = 0x4000000000000000; // .25 in layman's terms
int128 private constant MAX_DIFF = -0x10C6F7A0B5EE;
int128 private constant ONE_WEI = 0x12;
using ABDKMath64x64 for int128;
using UnsafeMath64x64 for int128;
using ABDKMath64x64 for uint256;
// This is used to prevent stack too deep errors
function calculateFee(
int128 _gLiq,
int128[] memory _bals,
Storage.Curve storage curve,
int128[] memory _weights
) internal view returns (int128 psi_) {
int128 _beta = curve.beta;
int128 _delta = curve.delta;
psi_ = calculateFee(_gLiq, _bals, _beta, _delta, _weights);
}
function calculateFee(
int128 _gLiq,
int128[] memory _bals,
int128 _beta,
int128 _delta,
int128[] memory _weights
) internal pure returns (int128 psi_) {
uint256 _length = _bals.length;
for (uint256 i = 0; i < _length; i++) {
int128 _ideal = _gLiq.mul(_weights[i]);
psi_ += calculateMicroFee(_bals[i], _ideal, _beta, _delta);
}
}
function calculateMicroFee(
int128 _bal,
int128 _ideal,
int128 _beta,
int128 _delta
) private pure returns (int128 fee_) {
if (_bal < _ideal) {
int128 _threshold = _ideal.mul(ONE - _beta);
if (_bal < _threshold) {
int128 _feeMargin = _threshold - _bal;
fee_ = _feeMargin.mul(_delta);
fee_ = fee_.div(_ideal);
if (fee_ > MAX) fee_ = MAX;
fee_ = fee_.mul(_feeMargin);
} else fee_ = 0;
} else {
int128 _threshold = _ideal.mul(ONE + _beta);
if (_bal > _threshold) {
int128 _feeMargin = _bal - _threshold;
fee_ = _feeMargin.mul(_delta);
fee_ = fee_.div(_ideal);
if (fee_ > MAX) fee_ = MAX;
fee_ = fee_.mul(_feeMargin);
} else fee_ = 0;
}
}
function calculateTrade(
Storage.Curve storage curve,
int128 _oGLiq,
int128 _nGLiq,
int128[] memory _oBals,
int128[] memory _nBals,
int128 _inputAmt,
uint256 _outputIndex
) internal view returns (int128 outputAmt_) {
outputAmt_ = -_inputAmt;
int128 _lambda = curve.lambda;
int128[] memory _weights = curve.weights;
int128 _omega = calculateFee(_oGLiq, _oBals, curve, _weights);
int128 _psi;
for (uint256 i = 0; i < 32; i++) {
_psi = calculateFee(_nGLiq, _nBals, curve, _weights);
int128 prevAmount;
{
prevAmount = outputAmt_;
outputAmt_ = _omega < _psi ? -(_inputAmt + _omega - _psi) : -(_inputAmt + _lambda.mul(_omega - _psi));
// outputAmt_ = _omega < _psi ? -(_inputAmt + _omega - _psi) : -(_inputAmt +_omega - _psi);
}
if (outputAmt_ / 1e13 == prevAmount / 1e13) {
_nGLiq = _oGLiq + _inputAmt + outputAmt_;
_nBals[_outputIndex] = _oBals[_outputIndex] + outputAmt_;
enforceHalts(curve, _oGLiq, _nGLiq, _oBals, _nBals, _weights);
enforceSwapInvariant(_oGLiq, _omega, _nGLiq, _psi);
return outputAmt_;
} else {
_nGLiq = _oGLiq + _inputAmt + outputAmt_;
_nBals[_outputIndex] = _oBals[_outputIndex].add(outputAmt_);
}
}
revert("Curve/swap-convergence-failed");
}
function calculateLiquidityMembrane(
Storage.Curve storage curve,
int128 _oGLiq,
int128 _nGLiq,
int128[] memory _oBals,
int128[] memory _nBals
) internal view returns (int128 curves_) {
enforceHalts(curve, _oGLiq, _nGLiq, _oBals, _nBals, curve.weights);
int128 _omega;
int128 _psi;
{
int128 _beta = curve.beta;
int128 _delta = curve.delta;
int128[] memory _weights = curve.weights;
_omega = calculateFee(_oGLiq, _oBals, _beta, _delta, _weights);
_psi = calculateFee(_nGLiq, _nBals, _beta, _delta, _weights);
}
int128 _feeDiff = _psi.sub(_omega);
int128 _liqDiff = _nGLiq.sub(_oGLiq);
int128 _oUtil = _oGLiq.sub(_omega);
int128 _totalShells = curve.totalSupply.divu(1e18);
int128 _curveMultiplier;
if (_totalShells == 0) {
curves_ = _nGLiq.sub(_psi);
} else if (_feeDiff >= 0) {
_curveMultiplier = _liqDiff.sub(_feeDiff).div(_oUtil);
} else {
_curveMultiplier = _liqDiff.sub(curve.lambda.mul(_feeDiff));
_curveMultiplier = _curveMultiplier.div(_oUtil);
}
if (_totalShells != 0) {
curves_ = _totalShells.mul(_curveMultiplier);
}
}
function enforceSwapInvariant(
int128 _oGLiq,
int128 _omega,
int128 _nGLiq,
int128 _psi
) private pure {
int128 _nextUtil = _nGLiq - _psi;
int128 _prevUtil = _oGLiq - _omega;
int128 _diff = _nextUtil - _prevUtil;
require(0 < _diff || _diff >= MAX_DIFF, "Curve/swap-invariant-violation");
}
function enforceHalts(
Storage.Curve storage curve,
int128 _oGLiq,
int128 _nGLiq,
int128[] memory _oBals,
int128[] memory _nBals,
int128[] memory _weights
) private view {
uint256 _length = _nBals.length;
int128 _alpha = curve.alpha;
for (uint256 i = 0; i < _length; i++) {
int128 _nIdeal = _nGLiq.mul(_weights[i]);
if (_nBals[i] > _nIdeal) {
int128 _upperAlpha = ONE + _alpha;
int128 _nHalt = _nIdeal.mul(_upperAlpha);
if (_nBals[i] > _nHalt) {
int128 _oHalt = _oGLiq.mul(_weights[i]).mul(_upperAlpha);
if (_oBals[i] < _oHalt) revert("Curve/upper-halt");
if (_nBals[i] - _nHalt > _oBals[i] - _oHalt) revert("Curve/upper-halt");
}
} else {
int128 _lowerAlpha = ONE - _alpha;
int128 _nHalt = _nIdeal.mul(_lowerAlpha);
if (_nBals[i] < _nHalt) {
int128 _oHalt = _oGLiq.mul(_weights[i]);
_oHalt = _oHalt.mul(_lowerAlpha);
if (_oBals[i] > _oHalt) revert("Curve/lower-halt");
if (_nHalt - _nBals[i] > _oHalt - _oBals[i]) revert("Curve/lower-halt");
}
}
}
}
}
library Orchestrator {
using SafeERC20 for IERC20;
using ABDKMath64x64 for int128;
using ABDKMath64x64 for uint256;
int128 private constant ONE_WEI = 0x12;
event ParametersSet(uint256 alpha, uint256 beta, uint256 delta, uint256 epsilon, uint256 lambda);
event AssetIncluded(address indexed numeraire, address indexed reserve, uint256 weight);
event AssimilatorIncluded(
address indexed derivative,
address indexed numeraire,
address indexed reserve,
address assimilator
);
function setParams(
Storage.Curve storage curve,
uint256 _alpha,
uint256 _beta,
uint256 _feeAtHalt,
uint256 _epsilon,
uint256 _lambda
) external {
require(0 < _alpha && _alpha < 1e18, "Curve/parameter-invalid-alpha");
require(_beta < _alpha, "Curve/parameter-invalid-beta");
require(_feeAtHalt <= 5e17, "Curve/parameter-invalid-max");
require(_epsilon <= 1e16, "Curve/parameter-invalid-epsilon");
require(_lambda <= 1e18, "Curve/parameter-invalid-lambda");
int128 _omega = getFee(curve);
curve.alpha = (_alpha + 1).divu(1e18);
curve.beta = (_beta + 1).divu(1e18);
curve.delta = (_feeAtHalt).divu(1e18).div(uint256(2).fromUInt().mul(curve.alpha.sub(curve.beta))) + ONE_WEI;
curve.epsilon = (_epsilon + 1).divu(1e18);
curve.lambda = (_lambda + 1).divu(1e18);
int128 _psi = getFee(curve);
require(_omega >= _psi, "Curve/parameters-increase-fee");
emit ParametersSet(_alpha, _beta, curve.delta.mulu(1e18), _epsilon, _lambda);
}
function setAssimilator(
Storage.Curve storage curve,
address _baseCurrency,
address _baseAssim,
address _quoteCurrency,
address _quoteAssim
) external {
require(_baseCurrency != address(0), "Curve/numeraire-cannot-be-zeroth-address");
require(_baseAssim != address(0), "Curve/numeraire-assimilator-cannot-be-zeroth-address");
require(_quoteCurrency != address(0), "Curve/reserve-cannot-be-zeroth-address");
require(_quoteAssim != address(0), "Curve/reserve-assimilator-cannot-be-zeroth-address");
Storage.Assimilator storage _baseAssimilator = curve.assimilators[_baseCurrency];
_baseAssimilator.addr = _baseAssim;
Storage.Assimilator storage _quoteAssimilator = curve.assimilators[_quoteCurrency];
_quoteAssimilator.addr = _quoteAssim;
curve.assets[0] = _baseAssimilator;
curve.assets[1] = _quoteAssimilator;
}
function getFee(Storage.Curve storage curve) private view returns (int128 fee_) {
int128 _gLiq;
// Always pairs
int128[] memory _bals = new int128[](2);
for (uint256 i = 0; i < _bals.length; i++) {
int128 _bal = Assimilators.viewNumeraireBalance(curve.assets[i].addr);
_bals[i] = _bal;
_gLiq += _bal;
}
fee_ = CurveMath.calculateFee(_gLiq, _bals, curve.beta, curve.delta, curve.weights);
}
function initialize(
Storage.Curve storage curve,
address[] storage numeraires,
address[] storage reserves,
address[] storage derivatives,
address[] calldata _assets,
uint256[] calldata _assetWeights
) external {
require(_assetWeights.length == 2, "Curve/assetWeights-must-be-length-two");
require(_assets.length % 5 == 0, "Curve/assets-must-be-divisible-by-five");
for (uint256 i = 0; i < _assetWeights.length; i++) {
uint256 ix = i * 5;
numeraires.push(_assets[ix]);
derivatives.push(_assets[ix]);
reserves.push(_assets[2 + ix]);
if (_assets[ix] != _assets[2 + ix]) derivatives.push(_assets[2 + ix]);
includeAsset(
curve,
_assets[ix], // numeraire
_assets[1 + ix], // numeraire assimilator
_assets[2 + ix], // reserve
_assets[3 + ix], // reserve assimilator
_assets[4 + ix], // reserve approve to
_assetWeights[i]
);
}
}
function includeAsset(
Storage.Curve storage curve,
address _numeraire,
address _numeraireAssim,
address _reserve,
address _reserveAssim,
address _reserveApproveTo,
uint256 _weight
) private {
require(_numeraire != address(0), "Curve/numeraire-cannot-be-zeroth-address");
require(_numeraireAssim != address(0), "Curve/numeraire-assimilator-cannot-be-zeroth-address");
require(_reserve != address(0), "Curve/reserve-cannot-be-zeroth-address");
require(_reserveAssim != address(0), "Curve/reserve-assimilator-cannot-be-zeroth-address");
require(_weight < 1e18, "Curve/weight-must-be-less-than-one");
if (_numeraire != _reserve) IERC20(_numeraire).safeApprove(_reserveApproveTo, type(uint).max);
Storage.Assimilator storage _numeraireAssimilator = curve.assimilators[_numeraire];
_numeraireAssimilator.addr = _numeraireAssim;
_numeraireAssimilator.ix = uint8(curve.assets.length);
Storage.Assimilator storage _reserveAssimilator = curve.assimilators[_reserve];
_reserveAssimilator.addr = _reserveAssim;
_reserveAssimilator.ix = uint8(curve.assets.length);
int128 __weight = _weight.divu(1e18).add(uint256(1).divu(1e18));
curve.weights.push(__weight);
curve.assets.push(_numeraireAssimilator);
emit AssetIncluded(_numeraire, _reserve, _weight);
emit AssimilatorIncluded(_numeraire, _numeraire, _reserve, _numeraireAssim);
if (_numeraireAssim != _reserveAssim) {
emit AssimilatorIncluded(_reserve, _numeraire, _reserve, _reserveAssim);
}
}
function viewCurve(Storage.Curve storage curve)
external
view
returns (
uint256 alpha_,
uint256 beta_,
uint256 delta_,
uint256 epsilon_,
uint256 lambda_
)
{
alpha_ = curve.alpha.mulu(1e18);
beta_ = curve.beta.mulu(1e18);
delta_ = curve.delta.mulu(1e18);
epsilon_ = curve.epsilon.mulu(1e18);
lambda_ = curve.lambda.mulu(1e18);
}
}
library ProportionalLiquidity {
using ABDKMath64x64 for uint256;
using ABDKMath64x64 for int128;
using UnsafeMath64x64 for int128;
event Transfer(address indexed from, address indexed to, uint256 value);
int128 public constant ONE = 0x10000000000000000;
int128 public constant ONE_WEI = 0x12;
function proportionalDeposit(Storage.Curve storage curve, DepositData memory depositData)
external
returns (uint256 curves_, uint256[] memory)
{
int128 __deposit = depositData.deposits.divu(1e18);
uint256 _length = curve.assets.length;
uint256[] memory deposits_ = new uint256[](_length);
(int128 _oGLiq, int128[] memory _oBals) = getGrossLiquidityAndBalancesForDeposit(curve);
// Needed to calculate liquidity invariant
// (int128 _oGLiqProp, int128[] memory _oBalsProp) = getGrossLiquidityAndBalances(curve);
// No liquidity, oracle sets the ratio
if (_oGLiq == 0) {
for (uint256 i = 0; i < _length; i++) {
// Variable here to avoid stack-too-deep errors
int128 _d = __deposit.mul(curve.weights[i]);
deposits_[i] = Assimilators.intakeNumeraire(curve.assets[i].addr, _d.add(ONE_WEI));
}
} else {
// We already have an existing pool ratio
// which must be respected
int128 _multiplier = __deposit.div(_oGLiq);
uint256 _baseWeight = curve.weights[0].mulu(1e18);
uint256 _quoteWeight = curve.weights[1].mulu(1e18);
for (uint256 i = 0; i < _length; i++) {
IntakeNumLpRatioInfo memory info;
info.baseWeight = _baseWeight;
info.minBase = depositData.minBase;
info.maxBase = depositData.maxBase;
info.quoteWeight = _quoteWeight;
info.minQuote = depositData.minQuote;
info.maxQuote = depositData.maxQuote;
info.amount = _oBals[i].mul(_multiplier).add(ONE_WEI);
deposits_[i] = Assimilators.intakeNumeraireLPRatio(
curve.assets[i].addr,
info
);
}
}
int128 _totalShells = curve.totalSupply.divu(1e18);
int128 _newShells = __deposit;
if (_totalShells > 0) {
_newShells = __deposit.mul(_totalShells);
_newShells = _newShells.div(_oGLiq);
}
require(_newShells > 0, "Proportional Liquidity/can't mint negative amount");
mint(curve, msg.sender, curves_ = _newShells.mulu(1e18));
return (curves_, deposits_);
}
function viewProportionalDeposit(Storage.Curve storage curve, uint256 _deposit)
external
view
returns (uint256 curves_, uint256[] memory)
{
int128 __deposit = _deposit.divu(1e18);
uint256 _length = curve.assets.length;
(int128 _oGLiq, int128[] memory _oBals) = getGrossLiquidityAndBalancesForDeposit(curve);
uint256[] memory deposits_ = new uint256[](_length);
// No liquidity
if (_oGLiq == 0) {
for (uint256 i = 0; i < _length; i++) {
deposits_[i] = Assimilators.viewRawAmount(
curve.assets[i].addr,
__deposit.mul(curve.weights[i]).add(ONE_WEI)
);
}
} else {
// We already have an existing pool ratio
// this must be respected
int128 _multiplier = __deposit.div(_oGLiq);
uint256 _baseWeight = curve.weights[0].mulu(1e18);
uint256 _quoteWeight = curve.weights[1].mulu(1e18);
// Deposits into the pool is determined by existing LP ratio
for (uint256 i = 0; i < _length; i++) {
deposits_[i] = Assimilators.viewRawAmountLPRatio(
curve.assets[i].addr,
_baseWeight,
_quoteWeight,
_oBals[i].mul(_multiplier).add(ONE_WEI)
);
}
}
int128 _totalShells = curve.totalSupply.divu(1e18);
int128 _newShells = __deposit;
if (_totalShells > 0) {
_newShells = __deposit.mul(_totalShells);
_newShells = _newShells.div(_oGLiq);
}
curves_ = _newShells.mulu(1e18);
return (curves_, deposits_);
}
function proportionalWithdraw(Storage.Curve storage curve, uint256 _withdrawal)
external
returns (uint256[] memory)
{
uint256 _length = curve.assets.length;
(, int128[] memory _oBals) = getGrossLiquidityAndBalances(curve);
uint256[] memory withdrawals_ = new uint256[](_length);
int128 _totalShells = curve.totalSupply.divu(1e18);
int128 __withdrawal = _withdrawal.divu(1e18);
int128 _multiplier = __withdrawal.div(_totalShells);
for (uint256 i = 0; i < _length; i++) {
withdrawals_[i] = Assimilators.outputNumeraire(
curve.assets[i].addr,
msg.sender,
_oBals[i].mul(_multiplier)
);
}
burn(curve, msg.sender, _withdrawal);
return withdrawals_;
}
function viewProportionalWithdraw(Storage.Curve storage curve, uint256 _withdrawal)
external
view
returns (uint256[] memory)
{
uint256 _length = curve.assets.length;
(, int128[] memory _oBals) = getGrossLiquidityAndBalances(curve);
uint256[] memory withdrawals_ = new uint256[](_length);
int128 _multiplier = _withdrawal.divu(1e18).div(curve.totalSupply.divu(1e18));
for (uint256 i = 0; i < _length; i++) {
withdrawals_[i] = Assimilators.viewRawAmount(curve.assets[i].addr, _oBals[i].mul(_multiplier));
}
return withdrawals_;
}
function getGrossLiquidityAndBalancesForDeposit(Storage.Curve storage curve)
internal
view
returns (int128 grossLiquidity_, int128[] memory)
{
uint256 _length = curve.assets.length;
int128[] memory balances_ = new int128[](_length);
uint256 _baseWeight = curve.weights[0].mulu(1e18);
uint256 _quoteWeight = curve.weights[1].mulu(1e18);
for (uint256 i = 0; i < _length; i++) {
int128 _bal = Assimilators.viewNumeraireBalanceLPRatio(_baseWeight, _quoteWeight, curve.assets[i].addr);
balances_[i] = _bal;
grossLiquidity_ += _bal;
}
return (grossLiquidity_, balances_);
}
function getGrossLiquidityAndBalances(Storage.Curve storage curve)
internal
view
returns (int128 grossLiquidity_, int128[] memory)
{
uint256 _length = curve.assets.length;
int128[] memory balances_ = new int128[](_length);
for (uint256 i = 0; i < _length; i++) {
int128 _bal = Assimilators.viewNumeraireBalance(curve.assets[i].addr);
balances_[i] = _bal;
grossLiquidity_ += _bal;
}
return (grossLiquidity_, balances_);
}
function burn(
Storage.Curve storage curve,
address account,
uint256 amount
) private {
curve.balances[account] = burnSub(curve.balances[account], amount);
curve.totalSupply = burnSub(curve.totalSupply, amount);
emit Transfer(msg.sender, address(0), amount);
}
function mint(
Storage.Curve storage curve,
address account,
uint256 amount
) private {
uint256 minLock = 1e6;
if (curve.totalSupply == 0) {
require(amount > minLock, "Proportional Liquidity/amount too small!");
uint256 toMintAmt = amount - minLock;
// mint to lp provider
curve.totalSupply = mintAdd(curve.totalSupply, toMintAmt);
curve.balances[account] = mintAdd(
curve.balances[account],
toMintAmt
);
emit Transfer(address(0), msg.sender, toMintAmt);
// mint to 0 address
curve.totalSupply = mintAdd(curve.totalSupply, minLock);
curve.balances[address(0)] = mintAdd(
curve.balances[address(0)],
minLock
);
emit Transfer(address(this), address(0), minLock);
} else {
curve.totalSupply = mintAdd(curve.totalSupply, amount);
curve.balances[account] = mintAdd(curve.balances[account], amount);
emit Transfer(address(0), msg.sender, amount);
}
}
function mintAdd(uint256 x, uint256 y) private pure returns (uint256 z) {
require((z = x + y) >= x, "Curve/mint-overflow");
}
function burnSub(uint256 x, uint256 y) private pure returns (uint256 z) {
require((z = x - y) <= x, "Curve/burn-underflow");
}
}
// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)
// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is disstributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
// Finds new Curves! logs their addresses and provides `isCurve(address) -> (bool)`
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
interface IFreeFromUpTo {
function freeFromUpTo(address from, uint256 value) external returns (uint256 freed);
}
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
contract CurveFactory is Ownable, ReentrancyGuard {
event NewCurve(address indexed caller, bytes32 indexed id, address indexed curve);
mapping(bytes32 => address) public curves;
function getCurve(address _baseCurrency, address _quoteCurrency) external view returns (address) {
bytes32 curveId = keccak256(abi.encode(_baseCurrency, _quoteCurrency));
return (curves[curveId]);
}
function newCurve(
string memory _name,
string memory _symbol,
address _baseCurrency,
address _quoteCurrency,
uint256 _baseWeight,
uint256 _quoteWeight,
address _baseAssimilator,
address _quoteAssimilator
) public nonReentrant onlyOwner returns (Curve) {
bytes32 curveId = keccak256(abi.encode(_baseCurrency, _quoteCurrency));
if (curves[curveId] != address(0)) revert("CurveFactory/currency-pair-already-exists");
address[] memory _assets = new address[](10);
uint256[] memory _assetWeights = new uint256[](2);
// Base Currency
_assets[0] = _baseCurrency;
_assets[1] = _baseAssimilator;
_assets[2] = _baseCurrency;
_assets[3] = _baseAssimilator;
_assets[4] = _baseCurrency;
// Quote Currency (typically USDC)
_assets[5] = _quoteCurrency;
_assets[6] = _quoteAssimilator;
_assets[7] = _quoteCurrency;
_assets[8] = _quoteAssimilator;
_assets[9] = _quoteCurrency;
// Weights
_assetWeights[0] = _baseWeight;
_assetWeights[1] = _quoteWeight;
// New curve
Curve curve = new Curve(_name, _symbol, _assets, _assetWeights, address(this));
curve.transferOwnership(msg.sender);
curves[curveId] = address(curve);
emit NewCurve(msg.sender, curveId, address(curve));
return curve;
}
}
library Swaps {
using ABDKMath64x64 for int128;
using ABDKMath64x64 for int256;
using UnsafeMath64x64 for int128;
using ABDKMath64x64 for uint256;
using SafeMath for uint256;
event Trade(
address indexed trader,
address indexed origin,
address indexed target,
uint256 originAmount,
uint256 targetAmount,
int128 rawProtocolFee
);
int128 public constant ONE = 0x10000000000000000;
function getOriginAndTarget(
Storage.Curve storage curve,
address _o,
address _t
) private view returns (Storage.Assimilator memory, Storage.Assimilator memory) {
Storage.Assimilator memory o_ = curve.assimilators[_o];
Storage.Assimilator memory t_ = curve.assimilators[_t];
require(o_.addr != address(0), "Curve/origin-not-supported");
require(t_.addr != address(0), "Curve/target-not-supported");
return (o_, t_);
}
function originSwap(Storage.Curve storage curve, OriginSwapData memory _swapData)
external
returns (
uint256 tAmt_
)
{
(Storage.Assimilator memory _o, Storage.Assimilator memory _t) =
getOriginAndTarget(curve, _swapData._origin, _swapData._target);
if (_o.ix == _t.ix)
return
Assimilators.outputNumeraire(
_t.addr,
_swapData._recipient,
Assimilators.intakeRaw(_o.addr, _swapData._originAmount)
);
SwapInfo memory _swapInfo;
(int128 _amt, int128 _oGLiq, int128 _nGLiq, int128[] memory _oBals, int128[] memory _nBals) =
getOriginSwapData(curve, _o.ix, _t.ix, _o.addr, _swapData._originAmount);
_swapInfo.totalAmount = _amt;
_amt = CurveMath.calculateTrade(curve, _oGLiq, _nGLiq, _oBals, _nBals, _amt, _t.ix);
_swapInfo.curveFactory = ICurveFactory(_swapData._curveFactory);
_swapInfo.amountToUser = _amt.us_mul(ONE - curve.epsilon);
// _swapInfo.totalFee = _swapInfo.totalAmount + _swapInfo.amountToUser;
_swapInfo.totalFee = _swapInfo.amountToUser - _amt;
_swapInfo.protocolFeePercentage = _swapInfo.curveFactory.getProtocolFee();
_swapInfo.treasury = _swapInfo.curveFactory.getProtocolTreasury();
_swapInfo.amountToTreasury = _swapInfo.totalFee.muli(_swapInfo.protocolFeePercentage).divi(100000);
Assimilators.transferFee(_t.addr, _swapInfo.amountToTreasury, _swapInfo.treasury);
tAmt_ = Assimilators.outputNumeraire(_t.addr, _swapData._recipient, _swapInfo.amountToUser);
emit Trade(msg.sender, _swapData._origin, _swapData._target, _swapData._originAmount, tAmt_, _swapInfo.amountToTreasury);
}
function viewOriginSwap(
Storage.Curve storage curve,
address _origin,
address _target,
uint256 _originAmount
) external view returns (uint256 tAmt_) {
(Storage.Assimilator memory _o, Storage.Assimilator memory _t) = getOriginAndTarget(curve, _origin, _target);
if (_o.ix == _t.ix)
return Assimilators.viewRawAmount(_t.addr, Assimilators.viewNumeraireAmount(_o.addr, _originAmount));
(int128 _amt, int128 _oGLiq, int128 _nGLiq, int128[] memory _nBals, int128[] memory _oBals) =
viewOriginSwapData(curve, _o.ix, _t.ix, _originAmount, _o.addr);
_amt = CurveMath.calculateTrade(curve, _oGLiq, _nGLiq, _oBals, _nBals, _amt, _t.ix);
_amt = _amt.us_mul(ONE - curve.epsilon);
tAmt_ = Assimilators.viewRawAmount(_t.addr, _amt.abs());
}
function targetSwap(Storage.Curve storage curve, TargetSwapData memory _swapData)
external
returns (
uint256 oAmt_
)
{
(Storage.Assimilator memory _o, Storage.Assimilator memory _t) =
getOriginAndTarget(curve, _swapData._origin, _swapData._target);
if (_o.ix == _t.ix)
return
Assimilators.intakeNumeraire(
_o.addr,
Assimilators.outputRaw(_t.addr, _swapData._recipient, _swapData._targetAmount)
);
(int128 _amt, int128 _oGLiq, int128 _nGLiq, int128[] memory _oBals, int128[] memory _nBals) =
getTargetSwapData(curve, _t.ix, _o.ix, _t.addr, _swapData._recipient, _swapData._targetAmount);
_amt = CurveMath.calculateTrade(curve, _oGLiq, _nGLiq, _oBals, _nBals, _amt, _o.ix);
SwapInfo memory _swapInfo;
_swapInfo.totalAmount = _amt;
_swapInfo.curveFactory = ICurveFactory(_swapData._curveFactory);
_swapInfo.amountToUser = _amt.us_mul(ONE + curve.epsilon);
_swapInfo.totalFee = _swapInfo.amountToUser - _amt;
_swapInfo.protocolFeePercentage = _swapInfo.curveFactory.getProtocolFee();
_swapInfo.treasury = _swapInfo.curveFactory.getProtocolTreasury();
_swapInfo.amountToTreasury = _swapInfo.totalFee.muli(_swapInfo.protocolFeePercentage).divi(100000);
Assimilators.transferFee(_o.addr, _swapInfo.amountToTreasury, _swapInfo.treasury);
oAmt_ = Assimilators.intakeNumeraire(_o.addr, _swapInfo.amountToUser);
emit Trade(msg.sender, _swapData._origin, _swapData._target, oAmt_, _swapData._targetAmount, _swapInfo.amountToTreasury);
}
function viewTargetSwap(
Storage.Curve storage curve,
address _origin,
address _target,
uint256 _targetAmount
) external view returns (uint256 oAmt_) {
(Storage.Assimilator memory _o, Storage.Assimilator memory _t) = getOriginAndTarget(curve, _origin, _target);
if (_o.ix == _t.ix)
return Assimilators.viewRawAmount(_o.addr, Assimilators.viewNumeraireAmount(_t.addr, _targetAmount));
(int128 _amt, int128 _oGLiq, int128 _nGLiq, int128[] memory _nBals, int128[] memory _oBals) =
viewTargetSwapData(curve, _t.ix, _o.ix, _targetAmount, _t.addr);
_amt = CurveMath.calculateTrade(curve, _oGLiq, _nGLiq, _oBals, _nBals, _amt, _o.ix);
_amt = _amt.us_mul(ONE + curve.epsilon);
oAmt_ = Assimilators.viewRawAmount(_o.addr, _amt);
}
function getOriginSwapData(
Storage.Curve storage curve,
uint256 _inputIx,
uint256 _outputIx,
address _assim,
uint256 _amt
)
private
returns (
int128 amt_,
int128 oGLiq_,
int128 nGLiq_,
int128[] memory,
int128[] memory
)
{
uint256 _length = curve.assets.length;
int128[] memory oBals_ = new int128[](_length);
int128[] memory nBals_ = new int128[](_length);
Storage.Assimilator[] memory _reserves = curve.assets;
for (uint256 i = 0; i < _length; i++) {
if (i != _inputIx) nBals_[i] = oBals_[i] = Assimilators.viewNumeraireBalance(_reserves[i].addr);
else {
int128 _bal;
(amt_, _bal) = Assimilators.intakeRawAndGetBalance(_assim, _amt);
oBals_[i] = _bal.sub(amt_);
nBals_[i] = _bal;
}
oGLiq_ += oBals_[i];
nGLiq_ += nBals_[i];
}
nGLiq_ = nGLiq_.sub(amt_);
nBals_[_outputIx] = ABDKMath64x64.sub(nBals_[_outputIx], amt_);
return (amt_, oGLiq_, nGLiq_, oBals_, nBals_);
}
function getTargetSwapData(
Storage.Curve storage curve,
uint256 _inputIx,
uint256 _outputIx,
address _assim,
address _recipient,
uint256 _amt
)
private
returns (
int128 amt_,
int128 oGLiq_,
int128 nGLiq_,
int128[] memory,
int128[] memory
)
{
uint256 _length = curve.assets.length;
int128[] memory oBals_ = new int128[](_length);
int128[] memory nBals_ = new int128[](_length);
Storage.Assimilator[] memory _reserves = curve.assets;
for (uint256 i = 0; i < _length; i++) {
if (i != _inputIx) nBals_[i] = oBals_[i] = Assimilators.viewNumeraireBalance(_reserves[i].addr);
else {
int128 _bal;
(amt_, _bal) = Assimilators.outputRawAndGetBalance(_assim, _recipient, _amt);
oBals_[i] = _bal.sub(amt_);
nBals_[i] = _bal;
}
oGLiq_ += oBals_[i];
nGLiq_ += nBals_[i];
}
nGLiq_ = nGLiq_.sub(amt_);
nBals_[_outputIx] = ABDKMath64x64.sub(nBals_[_outputIx], amt_);
return (amt_, oGLiq_, nGLiq_, oBals_, nBals_);
}
function viewOriginSwapData(
Storage.Curve storage curve,
uint256 _inputIx,
uint256 _outputIx,
uint256 _amt,
address _assim
)
private
view
returns (
int128 amt_,
int128 oGLiq_,
int128 nGLiq_,
int128[] memory,
int128[] memory
)
{
uint256 _length = curve.assets.length;
int128[] memory nBals_ = new int128[](_length);
int128[] memory oBals_ = new int128[](_length);
for (uint256 i = 0; i < _length; i++) {
if (i != _inputIx) nBals_[i] = oBals_[i] = Assimilators.viewNumeraireBalance(curve.assets[i].addr);
else {
int128 _bal;
(amt_, _bal) = Assimilators.viewNumeraireAmountAndBalance(_assim, _amt);
oBals_[i] = _bal;
nBals_[i] = _bal.add(amt_);
}
oGLiq_ += oBals_[i];
nGLiq_ += nBals_[i];
}
nGLiq_ = nGLiq_.sub(amt_);
nBals_[_outputIx] = ABDKMath64x64.sub(nBals_[_outputIx], amt_);
return (amt_, oGLiq_, nGLiq_, nBals_, oBals_);
}
function viewTargetSwapData(
Storage.Curve storage curve,
uint256 _inputIx,
uint256 _outputIx,
uint256 _amt,
address _assim
)
private
view
returns (
int128 amt_,
int128 oGLiq_,
int128 nGLiq_,
int128[] memory,
int128[] memory
)
{
uint256 _length = curve.assets.length;
int128[] memory nBals_ = new int128[](_length);
int128[] memory oBals_ = new int128[](_length);
for (uint256 i = 0; i < _length; i++) {
if (i != _inputIx) nBals_[i] = oBals_[i] = Assimilators.viewNumeraireBalance(curve.assets[i].addr);
else {
int128 _bal;
(amt_, _bal) = Assimilators.viewNumeraireAmountAndBalance(_assim, _amt);
amt_ = amt_.neg();
oBals_[i] = _bal;
nBals_[i] = _bal.add(amt_);
}
oGLiq_ += oBals_[i];
nGLiq_ += nBals_[i];
}
nGLiq_ = nGLiq_.sub(amt_);
nBals_[_outputIx] = ABDKMath64x64.sub(nBals_[_outputIx], amt_);
return (amt_, oGLiq_, nGLiq_, nBals_, oBals_);
}
}
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
library ViewLiquidity {
using ABDKMath64x64 for int128;
function viewLiquidity(Storage.Curve storage curve)
external
view
returns (uint256 total_, uint256[] memory individual_)
{
uint256 _length = curve.assets.length;
individual_ = new uint256[](_length);
for (uint256 i = 0; i < _length; i++) {
uint256 _liquidity = Assimilators.viewNumeraireBalance(curve.assets[i].addr).mulu(1e18);
total_ += _liquidity;
individual_[i] = _liquidity;
}
return (total_, individual_);
}
}
library Curves {
using ABDKMath64x64 for int128;
event Approval(
address indexed _owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function add(
uint256 x,
uint256 y,
string memory errorMessage
) private pure returns (uint256 z) {
require((z = x + y) >= x, errorMessage);
}
function sub(
uint256 x,
uint256 y,
string memory errorMessage
) private pure returns (uint256 z) {
require((z = x - y) <= x, errorMessage);
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(
Storage.Curve storage curve,
address recipient,
uint256 amount
) external returns (bool) {
_transfer(curve, msg.sender, recipient, amount);
return true;
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(
Storage.Curve storage curve,
address spender,
uint256 amount
) external returns (bool) {
_approve(curve, msg.sender, 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(
Storage.Curve storage curve,
address sender,
address recipient,
uint256 amount
) external returns (bool) {
_transfer(curve, sender, recipient, amount);
_approve(
curve,
sender,
msg.sender,
sub(
curve.allowances[sender][msg.sender],
amount,
"Curve/insufficient-allowance"
)
);
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(
Storage.Curve storage curve,
address spender,
uint256 addedValue
) external returns (bool) {
_approve(
curve,
msg.sender,
spender,
add(
curve.allowances[msg.sender][spender],
addedValue,
"Curve/approval-overflow"
)
);
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(
Storage.Curve storage curve,
address spender,
uint256 subtractedValue
) external returns (bool) {
_approve(
curve,
msg.sender,
spender,
sub(
curve.allowances[msg.sender][spender],
subtractedValue,
"Curve/allowance-decrease-underflow"
)
);
return true;
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is public 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(
Storage.Curve storage curve,
address sender,
address recipient,
uint256 amount
) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
curve.balances[sender] = sub(
curve.balances[sender],
amount,
"Curve/insufficient-balance"
);
curve.balances[recipient] = add(
curve.balances[recipient],
amount,
"Curve/transfer-overflow"
);
emit Transfer(sender, recipient, amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `_owner`s tokens.
*
* This is public 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(
Storage.Curve storage curve,
address _owner,
address spender,
uint256 amount
) private {
require(_owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
curve.allowances[_owner][spender] = amount;
emit Approval(_owner, spender, amount);
}
}
contract Curve is Storage, NoDelegateCall {
using SafeMath for uint256;
using ABDKMath64x64 for int128;
using SafeERC20 for IERC20;
address private curveFactory;
event Approval(
address indexed _owner,
address indexed spender,
uint256 value
);
event ParametersSet(
uint256 alpha,
uint256 beta,
uint256 delta,
uint256 epsilon,
uint256 lambda
);
event AssetIncluded(
address indexed numeraire,
address indexed reserve,
uint256 weight
);
event AssimilatorIncluded(
address indexed derivative,
address indexed numeraire,
address indexed reserve,
address assimilator
);
event PartitionRedeemed(
address indexed token,
address indexed redeemer,
uint256 value
);
event OwnershipTransfered(
address indexed previousOwner,
address indexed newOwner
);
event FrozenSet(bool isFrozen);
event EmergencyAlarm(bool isEmergency);
event Trade(
address indexed trader,
address indexed origin,
address indexed target,
uint256 originAmount,
uint256 targetAmount,
int128 rawProtocolFee
);
event Transfer(address indexed from, address indexed to, uint256 value);
event Flash(
address indexed from,
address indexed to,
uint256 value0,
uint256 value1,
uint256 paid0,
uint256 paid1
);
modifier onlyOwner() {
require(msg.sender == owner, "Curve/caller-is-not-owner");
_;
}
modifier nonReentrant() {
require(notEntered, "Curve/re-entered");
notEntered = false;
_;
notEntered = true;
}
modifier transactable() {
require(!frozen, "Curve/frozen-only-allowing-proportional-withdraw");
_;
}
modifier isEmergency() {
require(
emergency,
"Curve/emergency-only-allowing-emergency-proportional-withdraw"
);
_;
}
modifier isNotEmergency() {
require(
!emergency,
"Curve/emergency-only-allowing-emergency-proportional-withdraw"
);
_;
}
modifier deadline(uint256 _deadline) {
require(block.timestamp < _deadline, "Curve/tx-deadline-passed");
_;
}
modifier globallyTransactable() {
require(
!ICurveFactory(address(curveFactory)).getGlobalFrozenState(),
"Curve/frozen-globally-only-allowing-proportional-withdraw"
);
_;
}
modifier isFlashable() {
require(
ICurveFactory(address(curveFactory)).getFlashableState(),
"Curve/flashloans-paused"
);
_;
}
modifier isDepositable(address pool, uint256 deposits) {
{
uint256 poolCap = ICurveFactory(curveFactory).getPoolCap(pool);
uint256 supply = totalSupply();
require(
poolCap == 0 || supply.add(deposits) <= poolCap,
"curve/exceeds pool cap"
);
}
if (!ICurveFactory(curveFactory).isPoolGuarded(pool)) {
_;
} else {
_;
uint256 poolGuardAmt = ICurveFactory(curveFactory).getPoolGuardAmount(pool);
require(curve.balances[msg.sender] <= poolGuardAmt, "curve/deposit-exceeds-guard-amt");
}
}
constructor(
string memory _name,
string memory _symbol,
address[] memory _assets,
uint256[] memory _assetWeights,
address _factory
) {
require(_factory != address(0), "Curve/curve factory zero address!");
owner = msg.sender;
name = _name;
symbol = _symbol;
curveFactory = _factory;
emit OwnershipTransfered(address(0), msg.sender);
Orchestrator.initialize(
curve,
numeraires,
reserves,
derivatives,
_assets,
_assetWeights
);
}
/// @notice sets the parameters for the pool
/// @param _alpha the value for alpha (halt threshold) must be less than or equal to 1 and greater than 0
/// @param _beta the value for beta must be less than alpha and greater than 0
/// @param _feeAtHalt the maximum value for the fee at the halt point
/// @param _epsilon the base fee for the pool
/// @param _lambda the value for lambda must be less than or equal to 1 and greater than zero
function setParams(
uint256 _alpha,
uint256 _beta,
uint256 _feeAtHalt,
uint256 _epsilon,
uint256 _lambda
) external onlyOwner {
Orchestrator.setParams(
curve,
_alpha,
_beta,
_feeAtHalt,
_epsilon,
_lambda
);
}
function setAssimilator(
address _baseCurrency,
address _baseAssim,
address _quoteCurrency,
address _quoteAssim
) external onlyOwner {
Orchestrator.setAssimilator(
curve,
_baseCurrency,
_baseAssim,
_quoteCurrency,
_quoteAssim
);
}
/// @notice excludes an assimilator from the curve
/// @param _derivative the address of the assimilator to exclude
function excludeDerivative(address _derivative) external onlyOwner {
for (uint256 i = 0; i < numeraires.length; i++) {
if (_derivative == numeraires[i])
revert("Curve/cannot-delete-numeraire");
if (_derivative == reserves[i])
revert("Curve/cannot-delete-reserve");
}
delete curve.assimilators[_derivative];
}
/// @notice view the current parameters of the curve
/// @return alpha_ the current alpha value
/// beta_ the current beta value
/// delta_ the current delta value
/// epsilon_ the current epsilon value
/// lambda_ the current lambda value
/// omega_ the current omega value
function viewCurve()
external
view
returns (
uint256 alpha_,
uint256 beta_,
uint256 delta_,
uint256 epsilon_,
uint256 lambda_
)
{
return Orchestrator.viewCurve(curve);
}
function setEmergency(bool _emergency) external onlyOwner {
emit EmergencyAlarm(_emergency);
emergency = _emergency;
}
function setFrozen(bool _toFreezeOrNotToFreeze) external onlyOwner {
emit FrozenSet(_toFreezeOrNotToFreeze);
frozen = _toFreezeOrNotToFreeze;
}
function transferOwnership(address _newOwner) external onlyOwner {
require(
_newOwner != address(0),
"Curve/new-owner-cannot-be-zeroth-address"
);
emit OwnershipTransfered(owner, _newOwner);
owner = _newOwner;
}
/// @notice swap a dynamic origin amount for a fixed target amount
/// @param _origin the address of the origin
/// @param _target the address of the target
/// @param _originAmount the origin amount
/// @param _minTargetAmount the minimum target amount
/// @param _deadline deadline in block number after which the trade will not execute
/// @return targetAmount_ the amount of target that has been swapped for the origin amount
function originSwap(
address _origin,
address _target,
uint256 _originAmount,
uint256 _minTargetAmount,
uint256 _deadline
)
external
deadline(_deadline)
globallyTransactable
transactable
noDelegateCall
isNotEmergency
nonReentrant
returns (uint256 targetAmount_)
{
OriginSwapData memory _swapData;
_swapData._origin = _origin;
_swapData._target = _target;
_swapData._originAmount = _originAmount;
_swapData._recipient = msg.sender;
_swapData._curveFactory = curveFactory;
targetAmount_ = Swaps.originSwap(curve, _swapData);
// targetAmount_ = Swaps.originSwap(curve, _origin, _target, _originAmount, msg.sender,curveFactory);
require(
targetAmount_ >= _minTargetAmount,
"Curve/below-min-target-amount"
);
}
/// @notice view how much target amount a fixed origin amount will swap for
/// @param _origin the address of the origin
/// @param _target the address of the target
/// @param _originAmount the origin amount
/// @return targetAmount_ the target amount that would have been swapped for the origin amount
function viewOriginSwap(
address _origin,
address _target,
uint256 _originAmount
)
external
view
globallyTransactable
transactable
returns (uint256 targetAmount_)
{
targetAmount_ = Swaps.viewOriginSwap(
curve,
_origin,
_target,
_originAmount
);
}
/// @notice swap a dynamic origin amount for a fixed target amount
/// @param _origin the address of the origin
/// @param _target the address of the target
/// @param _maxOriginAmount the maximum origin amount
/// @param _targetAmount the target amount
/// @param _deadline deadline in block number after which the trade will not execute
/// @return originAmount_ the amount of origin that has been swapped for the target
function targetSwap(
address _origin,
address _target,
uint256 _maxOriginAmount,
uint256 _targetAmount,
uint256 _deadline
)
external
deadline(_deadline)
globallyTransactable
transactable
noDelegateCall
isNotEmergency
nonReentrant
returns (uint256 originAmount_)
{
TargetSwapData memory _swapData;
_swapData._origin = _origin;
_swapData._target = _target;
_swapData._targetAmount = _targetAmount;
_swapData._recipient = msg.sender;
_swapData._curveFactory = curveFactory;
originAmount_ = Swaps.targetSwap(curve, _swapData);
// originAmount_ = Swaps.targetSwap(curve, _origin, _target, _targetAmount, msg.sender,curveFactory);
require(
originAmount_ <= _maxOriginAmount,
"Curve/above-max-origin-amount"
);
}
/// @notice view how much of the origin currency the target currency will take
/// @param _origin the address of the origin
/// @param _target the address of the target
/// @param _targetAmount the target amount
/// @return originAmount_ the amount of target that has been swapped for the origin
function viewTargetSwap(
address _origin,
address _target,
uint256 _targetAmount
)
external
view
globallyTransactable
transactable
returns (uint256 originAmount_)
{
originAmount_ = Swaps.viewTargetSwap(
curve,
_origin,
_target,
_targetAmount
);
}
/// @notice deposit into the pool with no slippage from the numeraire assets the pool supports
/// @param _deposit the full amount you want to deposit into the pool which will be divided up evenly amongst
/// the numeraire assets of the pool
/// @return ( the amount of curves you receive in return for your deposit,
/// the amount deposited for each numeraire)
function deposit(uint256 _deposit,uint256 _minQuoteAmount,uint256 _minBaseAmount,uint256 _maxQuoteAmount, uint256 _maxBaseAmount, uint256 _deadline)
external
deadline(_deadline)
globallyTransactable
transactable
nonReentrant
noDelegateCall
isNotEmergency
isDepositable(address(this), _deposit)
returns (uint256, uint256[] memory)
{
require(_deposit >0, "Curve/deposit_below_zero");
// (curvesMinted_, deposits_)
DepositData memory _depositData;
_depositData.deposits = _deposit;
_depositData.minQuote = _minQuoteAmount;
_depositData.minBase = _minBaseAmount;
_depositData.maxQuote = _maxQuoteAmount;
_depositData.maxBase = _maxBaseAmount;
(
uint256 curvesMinted_,
uint256[] memory deposits_
) = ProportionalLiquidity.proportionalDeposit(curve, _depositData);
return (curvesMinted_, deposits_);
}
/// @notice view deposits and curves minted a given deposit would return
/// @param _deposit the full amount of stablecoins you want to deposit. Divided evenly according to the
/// prevailing proportions of the numeraire assets of the pool
/// @return (the amount of curves you receive in return for your deposit,
/// the amount deposited for each numeraire)
function viewDeposit(uint256 _deposit)
external
view
globallyTransactable
transactable
returns (uint256, uint256[] memory)
{
// curvesToMint_, depositsToMake_
return ProportionalLiquidity.viewProportionalDeposit(curve, _deposit);
}
/// @notice Emergency withdraw tokens in the event that the oracle somehow bugs out
/// and no one is able to withdraw due to the invariant check
/// @param _curvesToBurn the full amount you want to withdraw from the pool which will be withdrawn from evenly amongst the
/// numeraire assets of the pool
/// @return withdrawals_ the amonts of numeraire assets withdrawn from the pool
function emergencyWithdraw(uint256 _curvesToBurn, uint256 _deadline)
external
isEmergency
deadline(_deadline)
nonReentrant
noDelegateCall
returns (uint256[] memory withdrawals_)
{
return ProportionalLiquidity.proportionalWithdraw(curve, _curvesToBurn);
}
/// @notice withdrawas amount of curve tokens from the the pool equally from the numeraire assets of the pool with no slippage
/// @param _curvesToBurn the full amount you want to withdraw from the pool which will be withdrawn from evenly amongst the
/// numeraire assets of the pool
/// @return withdrawals_ the amonts of numeraire assets withdrawn from the pool
function withdraw(uint256 _curvesToBurn, uint256 _deadline)
external
deadline(_deadline)
nonReentrant
noDelegateCall
isNotEmergency
returns (uint256[] memory withdrawals_)
{
return ProportionalLiquidity.proportionalWithdraw(curve, _curvesToBurn);
}
/// @notice views the withdrawal information from the pool
/// @param _curvesToBurn the full amount you want to withdraw from the pool which will be withdrawn from evenly amongst the
/// numeraire assets of the pool
/// @return the amonnts of numeraire assets withdrawn from the pool
function viewWithdraw(uint256 _curvesToBurn)
external
view
globallyTransactable
transactable
returns (uint256[] memory)
{
return
ProportionalLiquidity.viewProportionalWithdraw(
curve,
_curvesToBurn
);
}
function supportsInterface(bytes4 _interface)
public
pure
returns (bool supports_)
{
supports_ =
this.supportsInterface.selector == _interface || // erc165
bytes4(0x7f5828d0) == _interface || // eip173
bytes4(0x36372b07) == _interface; // erc20
}
/// @notice transfers curve tokens
/// @param _recipient the address of where to send the curve tokens
/// @param _amount the amount of curve tokens to send
/// @return success_ the success bool of the call
function transfer(address _recipient, uint256 _amount)
public
nonReentrant
noDelegateCall
isNotEmergency
returns (bool success_)
{
success_ = Curves.transfer(curve, _recipient, _amount);
}
/// @notice transfers curve tokens from one address to another address
/// @param _sender the account from which the curve tokens will be sent
/// @param _recipient the account to which the curve tokens will be sent
/// @param _amount the amount of curve tokens to transfer
/// @return success_ the success bool of the call
function transferFrom(
address _sender,
address _recipient,
uint256 _amount
)
public
nonReentrant
noDelegateCall
isNotEmergency
returns (bool success_)
{
success_ = Curves.transferFrom(curve, _sender, _recipient, _amount);
}
/// @notice approves a user to spend curve tokens on their behalf
/// @param _spender the account to allow to spend from msg.sender
/// @param _amount the amount to specify the spender can spend
/// @return success_ the success bool of this call
function approve(address _spender, uint256 _amount)
public
nonReentrant
noDelegateCall
returns (bool success_)
{
success_ = Curves.approve(curve, _spender, _amount);
}
function flash(
address recipient,
uint256 amount0,
uint256 amount1,
bytes calldata data
)
external
isFlashable
globallyTransactable
nonReentrant
noDelegateCall
transactable
isNotEmergency
{
uint256 fee = curve.epsilon.mulu(1e18);
require(
IERC20(derivatives[0]).balanceOf(address(this)) > 0,
"Curve/token0-zero-liquidity-depth"
);
require(
IERC20(derivatives[1]).balanceOf(address(this)) > 0,
"Curve/token1-zero-liquidity-depth"
);
uint256 fee0 = FullMath.mulDivRoundingUp(amount0, fee, 1e18);
uint256 fee1 = FullMath.mulDivRoundingUp(amount1, fee, 1e18);
uint256 balance0Before = IERC20(derivatives[0]).balanceOf(
address(this)
);
uint256 balance1Before = IERC20(derivatives[1]).balanceOf(
address(this)
);
if (amount0 > 0)
IERC20(derivatives[0]).safeTransfer(recipient, amount0);
if (amount1 > 0)
IERC20(derivatives[1]).safeTransfer(recipient, amount1);
IFlashCallback(msg.sender).flashCallback(fee0, fee1, data);
uint256 balance0After = IERC20(derivatives[0]).balanceOf(address(this));
uint256 balance1After = IERC20(derivatives[1]).balanceOf(address(this));
require(
balance0Before.add(fee0) <= balance0After,
"Curve/insufficient-token0-returned"
);
require(
balance1Before.add(fee1) <= balance1After,
"Curve/insufficient-token1-returned"
);
// sub is safe because we know balanceAfter is gt balanceBefore by at least fee
uint256 paid0 = balance0After - balance0Before;
uint256 paid1 = balance1After - balance1Before;
IERC20(derivatives[0]).safeTransfer(owner, paid0);
IERC20(derivatives[1]).safeTransfer(owner, paid1);
emit Flash(msg.sender, recipient, amount0, amount1, paid0, paid1);
}
/// @notice view the curve token balance of a given account
/// @param _account the account to view the balance of
/// @return balance_ the curve token ballance of the given account
function balanceOf(address _account)
public
view
returns (uint256 balance_)
{
balance_ = curve.balances[_account];
}
/// @notice views the total curve supply of the pool
/// @return totalSupply_ the total supply of curve tokens
function totalSupply() public view returns (uint256 totalSupply_) {
totalSupply_ = curve.totalSupply;
}
/// @notice views the total allowance one address has to spend from another address
/// @param _owner the address of the owner
/// @param _spender the address of the spender
/// @return allowance_ the amount the owner has allotted the spender
function allowance(address _owner, address _spender)
public
view
returns (uint256 allowance_)
{
allowance_ = curve.allowances[_owner][_spender];
}
/// @notice views the total amount of liquidity in the curve in numeraire value and format - 18 decimals
/// @return total_ the total value in the curve
/// @return individual_ the individual values in the curve
function liquidity()
public
view
returns (uint256 total_, uint256[] memory individual_)
{
return ViewLiquidity.viewLiquidity(curve);
}
/// @notice view the assimilator address for a derivative
/// @return assimilator_ the assimilator address
function assimilator(address _derivative)
public
view
returns (address assimilator_)
{
assimilator_ = curve.assimilators[_derivative].addr;
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"string","name":"_name","type":"string"},{"internalType":"string","name":"_symbol","type":"string"},{"internalType":"address[]","name":"_assets","type":"address[]"},{"internalType":"uint256[]","name":"_assetWeights","type":"uint256[]"},{"internalType":"address","name":"_factory","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"numeraire","type":"address"},{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":false,"internalType":"uint256","name":"weight","type":"uint256"}],"name":"AssetIncluded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"derivative","type":"address"},{"indexed":true,"internalType":"address","name":"numeraire","type":"address"},{"indexed":true,"internalType":"address","name":"reserve","type":"address"},{"indexed":false,"internalType":"address","name":"assimilator","type":"address"}],"name":"AssimilatorIncluded","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"isEmergency","type":"bool"}],"name":"EmergencyAlarm","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"value1","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"paid0","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"paid1","type":"uint256"}],"name":"Flash","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"isFrozen","type":"bool"}],"name":"FrozenSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransfered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"alpha","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"beta","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"delta","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"epsilon","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lambda","type":"uint256"}],"name":"ParametersSet","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"token","type":"address"},{"indexed":true,"internalType":"address","name":"redeemer","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"PartitionRedeemed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"trader","type":"address"},{"indexed":true,"internalType":"address","name":"origin","type":"address"},{"indexed":true,"internalType":"address","name":"target","type":"address"},{"indexed":false,"internalType":"uint256","name":"originAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"targetAmount","type":"uint256"},{"indexed":false,"internalType":"int128","name":"rawProtocolFee","type":"int128"}],"name":"Trade","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"allowance_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_spender","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"success_","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_derivative","type":"address"}],"name":"assimilator","outputs":[{"internalType":"address","name":"assimilator_","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"curve","outputs":[{"internalType":"int128","name":"alpha","ty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e":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_origin","type":"address"},{"internalType":"address","name":"_target","type":"address"},{"internalType":"uint256","name":"_maxOriginAmount","type":"uint256"},{"internalType":"uint256","name":"_targetAmount","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"}],"name":"targetSwap","outputs":[{"internalType":"uint256","name":"originAmount_","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"totalSupply_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"success_","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_sender","type":"address"},{"internalType":"address","name":"_recipient","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"success_","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"viewCurve","outputs":[{"internalType":"uint256","name":"alpha_","type":"uint256"},{"internalType":"uint256","name":"beta_","type":"uint256"},{"internalType":"uint256","name":"delta_","type":"uint256"},{"internalType":"uint256","name":"epsilon_","type":"uint256"},{"internalType":"uint256","name":"lambda_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_deposit","type":"uint256"}],"name":"viewDeposit","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_origin","type":"address"},{"internalType":"address","name":"_target","type":"address"},{"internalType":"uint256","name":"_originAmount","type":"uint256"}],"name":"viewOriginSwap","outputs":[{"internalType":"uint256","name":"targetAmount_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_origin","type":"address"},{"internalType":"address","name":"_target","type":"address"},{"internalType":"uint256","name":"_targetAmount","type":"uint256"}],"name":"viewTargetSwap","outputs":[{"internalType":"uint256","name":"originAmount_","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_curvesToBurn","type":"uint256"}],"name":"viewWithdraw","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_curvesToBurn","type":"uint256"},{"internalType":"uint256","name":"_deadline","type":"uint256"}],"name":"withdraw","outputs":[{"internalType":"uint256[]","name":"withdrawals_","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000012000000000000000000000000000000000000000000000000000000000000002800000000000000000000000009544995b5312b26acdf09e66e699c34310b7c85600000000000000000000000000000000000000000000000000000000000000106466782d636164632d757364632d763200000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000b6466782d636164632d7632000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f700000000000000000000000006496a00683501cc00ad00cf21fa0c39d504619b30000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f700000000000000000000000006496a00683501cc00ad00cf21fa0c39d504619b30000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f70000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc800000000000000000000000049b5af4d95d550d0ea6d92088803388370beb1d6000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc800000000000000000000000049b5af4d95d550d0ea6d92088803388370beb1d6000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc8000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000006f05b59d3b2000000000000000000000000000000000000000000000000000006f05b59d3b20000
-----Decoded View---------------
Arg [0] : _name (string): dfx-cadc-usdc-v2
Arg [1] : _symbol (string): dfx-cadc-v2
Arg [2] : _assets (address[]): 0x2b28E826b55e399F4d4699b85f68666AC51e6f70,0x6496A00683501cC00aD00cF21Fa0C39d504619B3,0x2b28E826b55e399F4d4699b85f68666AC51e6f70,0x6496A00683501cC00aD00cF21Fa0C39d504619B3,0x2b28E826b55e399F4d4699b85f68666AC51e6f70,0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8,0x49B5Af4D95D550d0Ea6D92088803388370bEb1d6,0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8,0x49B5Af4D95D550d0Ea6D92088803388370bEb1d6,0xFF970A61A04b1cA14834A43f5dE4533eBDDB5CC8
Arg [3] : _assetWeights (uint256[]): 500000000000000000,500000000000000000
Arg [4] : _factory (address): 0x9544995B5312B26acDf09e66E699c34310b7c856
-----Encoded View---------------
23 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000280
Arg [4] : 0000000000000000000000009544995b5312b26acdf09e66e699c34310b7c856
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000010
Arg [6] : 6466782d636164632d757364632d763200000000000000000000000000000000
Arg [7] : 000000000000000000000000000000000000000000000000000000000000000b
Arg [8] : 6466782d636164632d7632000000000000000000000000000000000000000000
Arg [9] : 000000000000000000000000000000000000000000000000000000000000000a
Arg [10] : 0000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f70
Arg [11] : 0000000000000000000000006496a00683501cc00ad00cf21fa0c39d504619b3
Arg [12] : 0000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f70
Arg [13] : 0000000000000000000000006496a00683501cc00ad00cf21fa0c39d504619b3
Arg [14] : 0000000000000000000000002b28e826b55e399f4d4699b85f68666ac51e6f70
Arg [15] : 000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc8
Arg [16] : 00000000000000000000000049b5af4d95d550d0ea6d92088803388370beb1d6
Arg [17] : 000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc8
Arg [18] : 00000000000000000000000049b5af4d95d550d0ea6d92088803388370beb1d6
Arg [19] : 000000000000000000000000ff970a61a04b1ca14834a43f5de4533ebddb5cc8
Arg [20] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [21] : 00000000000000000000000000000000000000000000000006f05b59d3b20000
Arg [22] : 00000000000000000000000000000000000000000000000006f05b59d3b20000
Library Used
Orchestrator : 0xf6a1775ccfdfe2c37b3375798a3cf3b7ded4532dProportionalLiquidity : 0x2a22a524337c7fa74a121471834981e4fd6e6a5eViewLiquidity : 0xe6c74a83d2b8d1b6a1b46d499cf274dfba647ad3
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://a7b7aa470f4fce8d3d753a89f985ed3a9115fe874c83044897b789f1fdcdaa28
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Net Worth in USD
$0.00
Net Worth in ETH
0
Multichain Portfolio | 35 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.