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Contract Name:
TokenTransferProxy
Compiler Version
v0.7.5+commit.eb77ed08
Contract Source Code (Solidity)
/**
*Submitted for verification at Etherscan.io on 2021-04-02
*/
/**
*Submitted for verification at Etherscan.io on 2021-04-02
*/
// File: original_contracts/IWhitelisted.sol
pragma solidity 0.7.5;
interface IWhitelisted {
function hasRole(
bytes32 role,
address account
)
external
view
returns (bool);
function WHITELISTED_ROLE() external view returns(bytes32);
}
// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: original_contracts/lib/IExchange.sol
pragma solidity 0.7.5;
/**
* @dev This interface should be implemented by all exchanges which needs to integrate with the paraswap protocol
*/
interface IExchange {
/**
* @dev The function which performs the swap on an exchange.
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param exchange Internal exchange or factory contract address for the exchange. For example Registry address for the Uniswap
* @param payload Any exchange specific data which is required can be passed in this argument in encoded format which
* will be decoded by the exchange. Each exchange will publish it's own decoding/encoding mechanism
*/
//TODO: REMOVE RETURN STATEMENT
function swap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload) external payable;
/**
* @dev The function which performs the swap on an exchange.
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Max Amount of source tokens to be swapped
* @param toAmount Destination token amount expected out of this swap
* @param exchange Internal exchange or factory contract address for the exchange. For example Registry address for the Uniswap
* @param payload Any exchange specific data which is required can be passed in this argument in encoded format which
* will be decoded by the exchange. Each exchange will publish it's own decoding/encoding mechanism
*/
function buy(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount,
address exchange,
bytes calldata payload) external payable;
/**
* @dev This function is used to perform onChainSwap. It build all the parameters onchain. Basically the information
* encoded in payload param of swap will calculated in this case
* Exchange needs to implement this method in order to support swapping of tokens through it
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
*/
function onChainSwap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 toAmount
) external payable returns (uint256);
/**
* @dev Certain adapters/exchanges needs to be initialized.
* This method will be called from Augustus
*/
function initialize(bytes calldata data) external;
/**
* @dev Returns unique identifier for the adapter
*/
function getKey() external pure returns(bytes32);
}
// File: openzeppelin-solidity/contracts/math/SafeMath.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @dev Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @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) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @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 sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @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) {
// 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 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts 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 mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message 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, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
// File: original_contracts/lib/SafeERC20.sol
pragma solidity 0.7.5;
library Address {
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// File: original_contracts/ITokenTransferProxy.sol
pragma solidity 0.7.5;
interface ITokenTransferProxy {
function transferFrom(
address token,
address from,
address to,
uint256 amount
)
external;
function freeReduxTokens(address user, uint256 tokensToFree) external;
}
// File: original_contracts/lib/Utils.sol
pragma solidity 0.7.5;
library Utils {
using SafeMath for uint256;
using SafeERC20 for IERC20;
address constant ETH_ADDRESS = address(
0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
);
address constant WETH_ADDRESS = address(
0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2
);
uint256 constant MAX_UINT = 2 ** 256 - 1;
/**
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param expectedAmount Expected amount of destination tokens without slippage
* @param beneficiary Beneficiary address
* 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
* @param referrer referral id
* @param path Route to be taken for this swap to take place
*/
struct SellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.Path[] path;
}
struct MegaSwapSellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.MegaSwapPath[] path;
}
struct BuyData {
address fromToken;
address toToken;
uint256 fromAmount;
uint256 toAmount;
address payable beneficiary;
string referrer;
bool useReduxToken;
Utils.BuyRoute[] route;
}
struct Route {
address payable exchange;
address targetExchange;
uint percent;
bytes payload;
uint256 networkFee;//Network fee is associated with 0xv3 trades
}
struct MegaSwapPath {
uint256 fromAmountPercent;
Path[] path;
}
struct Path {
address to;
uint256 totalNetworkFee;//Network fee is associated with 0xv3 trades
Route[] routes;
}
struct BuyRoute {
address payable exchange;
address targetExchange;
uint256 fromAmount;
uint256 toAmount;
bytes payload;
uint256 networkFee;//Network fee is associated with 0xv3 trades
}
function ethAddress() internal pure returns (address) {return ETH_ADDRESS;}
function wethAddress() internal pure returns (address) {return WETH_ADDRESS;}
function maxUint() internal pure returns (uint256) {return MAX_UINT;}
function approve(
address addressToApprove,
address token,
uint256 amount
) internal {
if (token != ETH_ADDRESS) {
IERC20 _token = IERC20(token);
uint allowance = _token.allowance(address(this), addressToApprove);
if (allowance < amount) {
_token.safeApprove(addressToApprove, 0);
_token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
}
}
}
function transferTokens(
address token,
address payable destination,
uint256 amount
)
internal
{
if (amount > 0) {
if (token == ETH_ADDRESS) {
(bool result, ) = destination.call{value: amount, gas: 4000}("");
require(result, "Failed to transfer Ether");
}
else {
IERC20(token).safeTransfer(destination, amount);
}
}
}
function tokenBalance(
address token,
address account
)
internal
view
returns (uint256)
{
if (token == ETH_ADDRESS) {
return account.balance;
} else {
return IERC20(token).balanceOf(account);
}
}
/**
* @dev Helper method to refund gas using gas tokens
*/
function refundGas(
address account,
address tokenTransferProxy,
uint256 initialGas
)
internal
{
uint256 freeBase = 14154;
uint256 freeToken = 6870;
uint256 reimburse = 24000;
uint256 tokens = initialGas.sub(
gasleft()).add(freeBase).div(reimburse.mul(2).sub(freeToken)
);
freeGasTokens(account, tokenTransferProxy, tokens);
}
/**
* @dev Helper method to free gas tokens
*/
function freeGasTokens(address account, address tokenTransferProxy, uint256 tokens) internal {
uint256 tokensToFree = tokens;
uint256 safeNumTokens = 0;
uint256 gas = gasleft();
if (gas >= 27710) {
safeNumTokens = gas.sub(27710).div(1148 + 5722 + 150);
}
if (tokensToFree > safeNumTokens) {
tokensToFree = safeNumTokens;
}
ITokenTransferProxy(tokenTransferProxy).freeReduxTokens(account, tokensToFree);
}
}
// File: openzeppelin-solidity/contracts/GSN/Context.sol
pragma solidity >=0.6.0 <0.8.0;
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with GSN 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 payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
// File: openzeppelin-solidity/contracts/access/Ownable.sol
pragma solidity >=0.6.0 <0.8.0;
/**
* @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 () internal {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
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 {
emit OwnershipTransferred(_owner, address(0));
_owner = 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");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
// File: original_contracts/IReduxToken.sol
pragma solidity 0.7.5;
interface IReduxToken {
function freeUpTo(uint256 value) external returns (uint256 freed);
function freeFromUpTo(address from, uint256 value) external returns (uint256 freed);
function mint(uint256 value) external;
}
// File: original_contracts/TokenTransferProxy.sol
pragma solidity 0.7.5;
/**
* @dev Allows owner of the contract to transfer tokens on behalf of user.
* User will need to approve this contract to spend tokens on his/her behalf
* on Paraswap platform
*/
contract TokenTransferProxy is Ownable, ITokenTransferProxy {
using SafeERC20 for IERC20;
IReduxToken public reduxToken;
constructor(address _reduxToken) public {
reduxToken = IReduxToken(_reduxToken);
}
/**
* @dev Allows owner of the contract to transfer tokens on user's behalf
* @dev Swapper contract will be the owner of this contract
* @param token Address of the token
* @param from Address from which tokens will be transferred
* @param to Receipent address of the tokens
* @param amount Amount of tokens to transfer
*/
function transferFrom(
address token,
address from,
address to,
uint256 amount
)
external
override
onlyOwner
{
IERC20(token).safeTransferFrom(from, to, amount);
}
function freeReduxTokens(address user, uint256 tokensToFree) external override onlyOwner {
reduxToken.freeFromUpTo(user, tokensToFree);
}
}
// File: original_contracts/IPartnerRegistry.sol
pragma solidity 0.7.5;
interface IPartnerRegistry {
function getPartnerContract(string calldata referralId) external view returns(address);
}
// File: original_contracts/IPartner.sol
pragma solidity 0.7.5;
interface IPartner {
function getPartnerInfo() external view returns(
address payable feeWallet,
uint256 fee,
uint256 partnerShare,
uint256 paraswapShare,
bool positiveSlippageToUser,
bool noPositiveSlippage
);
}
// File: original_contracts/lib/TokenFetcherAugustus.sol
pragma solidity 0.7.5;
contract TokenFetcherAugustus {
address internal _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Returns the address of the current owner.
*/
function owner() public view returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(_owner == msg.sender, "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 onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = 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 onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
/**
* @dev Allows owner of the contract to transfer any tokens which are assigned to the contract
* This method is for safety if by any chance tokens or ETHs are assigned to the contract by mistake
* @dev token Address of the token to be transferred
* @dev destination Recepient of the token
* @dev amount Amount of tokens to be transferred
*/
function transferTokens(
address token,
address payable destination,
uint256 amount
)
external
onlyOwner
{
Utils.transferTokens(token, destination, amount);
}
}
// File: original_contracts/IWETH.sol
pragma solidity 0.7.5;
abstract contract IWETH is IERC20 {
function deposit() external virtual payable;
function withdraw(uint256 amount) external virtual;
}
// File: original_contracts/IUniswapProxy.sol
pragma solidity 0.7.5;
interface IUniswapProxy {
function swapOnUniswap(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path
)
external
returns (uint256);
function swapOnUniswapFork(
address factory,
bytes32 initCode,
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path
)
external
returns (uint256);
function buyOnUniswap(
uint256 amountInMax,
uint256 amountOut,
address[] calldata path
)
external
returns (uint256 tokensSold);
function buyOnUniswapFork(
address factory,
bytes32 initCode,
uint256 amountInMax,
uint256 amountOut,
address[] calldata path
)
external
returns (uint256 tokensSold);
function setupTokenSpender(address tokenSpender) external;
}
// File: original_contracts/AdapterStorage.sol
pragma solidity 0.7.5;
contract AdapterStorage {
mapping (bytes32 => bool) internal adapterInitialized;
mapping (bytes32 => bytes) internal adapterVsData;
ITokenTransferProxy internal _tokenTransferProxy;
function isInitialized(bytes32 key) public view returns(bool) {
return adapterInitialized[key];
}
function getData(bytes32 key) public view returns(bytes memory) {
return adapterVsData[key];
}
function getTokenTransferProxy() public view returns (address) {
return address(_tokenTransferProxy);
}
}
// File: original_contracts/AugustusSwapper.sol
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
contract AugustusSwapper is AdapterStorage, TokenFetcherAugustus {
using SafeMath for uint256;
IWhitelisted private _whitelisted;
IPartnerRegistry private _partnerRegistry;
address payable private _feeWallet;
address private _uniswapProxy;
address private _pendingUniswapProxy;
uint256 private _changeRequestedBlock;
//Number of blocks after which UniswapProxy change can be confirmed
uint256 private _timelock;
event Swapped(
address initiator,
address indexed beneficiary,
address indexed srcToken,
address indexed destToken,
uint256 srcAmount,
uint256 receivedAmount,
uint256 expectedAmount,
string referrer
);
event Bought(
address initiator,
address indexed beneficiary,
address indexed srcToken,
address indexed destToken,
uint256 srcAmount,
uint256 receivedAmount,
string referrer
);
event FeeTaken(
uint256 fee,
uint256 partnerShare,
uint256 paraswapShare
);
event AdapterInitialized(address indexed adapter);
modifier onlySelf() {
require(
msg.sender == address(this),
"AugustusSwapper: Invalid access"
);
_;
}
receive () payable external {
}
function getTimeLock() external view returns(uint256) {
return _timelock;
}
function initialize(
address whitelist,
address reduxToken,
address partnerRegistry,
address payable feeWallet,
address uniswapProxy,
uint256 timelock
)
external
{
require(address(_tokenTransferProxy) == address(0), "Contract already initialized!!");
_partnerRegistry = IPartnerRegistry(partnerRegistry);
TokenTransferProxy lTokenTransferProxy = new TokenTransferProxy(reduxToken);
_tokenTransferProxy = ITokenTransferProxy(lTokenTransferProxy);
_whitelisted = IWhitelisted(whitelist);
_feeWallet = feeWallet;
_uniswapProxy = uniswapProxy;
_owner = msg.sender;
_timelock = timelock;
}
function initializeAdapter(address adapter, bytes calldata data) external onlyOwner {
require(
_whitelisted.hasRole(_whitelisted.WHITELISTED_ROLE(), adapter),
"Exchange not whitelisted"
);
(bool success,) = adapter.delegatecall(abi.encodeWithSelector(IExchange.initialize.selector, data));
require(success, "Failed to initialize adapter");
emit AdapterInitialized(adapter);
}
function getPendingUniswapProxy() external view returns(address) {
return _pendingUniswapProxy;
}
function getChangeRequestedBlock() external view returns(uint256) {
return _changeRequestedBlock;
}
function getUniswapProxy() external view returns(address) {
return _uniswapProxy;
}
function getVersion() external view returns(string memory) {
return "4.0.0";
}
function getPartnerRegistry() external view returns(address) {
return address(_partnerRegistry);
}
function getWhitelistAddress() external view returns(address) {
return address(_whitelisted);
}
function getFeeWallet() external view returns(address) {
return _feeWallet;
}
function changeUniswapProxy(address uniswapProxy) external onlyOwner {
require(uniswapProxy != address(0), "Invalid address");
_changeRequestedBlock = block.number;
_pendingUniswapProxy = uniswapProxy;
}
function confirmUniswapProxyChange() external onlyOwner {
require(
block.number >= _changeRequestedBlock.add(_timelock),
"Time lock check failed"
);
require(_pendingUniswapProxy != address(0), "No pending request");
_changeRequestedBlock = 0;
_uniswapProxy = _pendingUniswapProxy;
_pendingUniswapProxy = address(0);
}
function setFeeWallet(address payable feeWallet) external onlyOwner {
require(feeWallet != address(0), "Invalid address");
_feeWallet = feeWallet;
}
function setPartnerRegistry(address partnerRegistry) external onlyOwner {
require(partnerRegistry != address(0), "Invalid address");
_partnerRegistry = IPartnerRegistry(partnerRegistry);
}
function setWhitelistAddress(address whitelisted) external onlyOwner {
require(whitelisted != address(0), "Invalid whitelist address");
_whitelisted = IWhitelisted(whitelisted);
}
function swapOnUniswap(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
uint8 referrer
)
external
payable
{
//DELEGATING CALL TO THE ADAPTER
(bool success, bytes memory result) = _uniswapProxy.delegatecall(
abi.encodeWithSelector(
IUniswapProxy.swapOnUniswap.selector,
amountIn,
amountOutMin,
path
)
);
require(success, "Call to uniswap proxy failed");
}
function buyOnUniswap(
uint256 amountInMax,
uint256 amountOut,
address[] calldata path,
uint8 referrer
)
external
payable
{
//DELEGATING CALL TO THE ADAPTER
(bool success, bytes memory result) = _uniswapProxy.delegatecall(
abi.encodeWithSelector(
IUniswapProxy.buyOnUniswap.selector,
amountInMax,
amountOut,
path
)
);
require(success, "Call to uniswap proxy failed");
}
function buyOnUniswapFork(
address factory,
bytes32 initCode,
uint256 amountInMax,
uint256 amountOut,
address[] calldata path,
uint8 referrer
)
external
payable
{
//DELEGATING CALL TO THE ADAPTER
(bool success, bytes memory result) = _uniswapProxy.delegatecall(
abi.encodeWithSelector(
IUniswapProxy.buyOnUniswapFork.selector,
factory,
initCode,
amountInMax,
amountOut,
path
)
);
require(success, "Call to uniswap proxy failed");
}
function swapOnUniswapFork(
address factory,
bytes32 initCode,
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
uint8 referrer
)
external
payable
{
//DELEGATING CALL TO THE ADAPTER
(bool success, bytes memory result) = _uniswapProxy.delegatecall(
abi.encodeWithSelector(
IUniswapProxy.swapOnUniswapFork.selector,
factory,
initCode,
amountIn,
amountOutMin,
path
)
);
require(success, "Call to uniswap proxy failed");
}
function simplBuy(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
address[] memory callees,
bytes memory exchangeData,
uint256[] memory startIndexes,
uint256[] memory values,
address payable beneficiary,
string memory referrer,
bool useReduxToken
)
external
payable
{
beneficiary = beneficiary == address(0) ? msg.sender : beneficiary;
uint receivedAmount = performSimpleSwap(
fromToken,
toToken,
fromAmount,
toAmount,
toAmount,//expected amount and to amount are same in case of buy
callees,
exchangeData,
startIndexes,
values,
beneficiary,
referrer,
useReduxToken
);
uint256 remainingAmount = Utils.tokenBalance(
fromToken,
address(this)
);
if (remainingAmount > 0) {
Utils.transferTokens(address(fromToken), msg.sender, remainingAmount);
}
emit Bought(
msg.sender,
beneficiary,
fromToken,
toToken,
fromAmount,
receivedAmount,
referrer
);
}
function approve(
address token,
address to,
uint256 amount
)
external
onlySelf
{
Utils.approve(to, token, amount);
}
function simpleSwap(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
uint256 expectedAmount,
address[] memory callees,
bytes memory exchangeData,
uint256[] memory startIndexes,
uint256[] memory values,
address payable beneficiary,
string memory referrer,
bool useReduxToken
)
public
payable
returns (uint256 receivedAmount)
{
beneficiary = beneficiary == address(0) ? msg.sender : beneficiary;
receivedAmount = performSimpleSwap(
fromToken,
toToken,
fromAmount,
toAmount,
expectedAmount,
callees,
exchangeData,
startIndexes,
values,
beneficiary,
referrer,
useReduxToken
);
emit Swapped(
msg.sender,
beneficiary,
fromToken,
toToken,
fromAmount,
receivedAmount,
expectedAmount,
referrer
);
return receivedAmount;
}
function transferTokensFromProxy(
address token,
uint256 amount
)
private
{
if (token != Utils.ethAddress()) {
_tokenTransferProxy.transferFrom(
token,
msg.sender,
address(this),
amount
);
}
}
function performSimpleSwap(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
uint256 expectedAmount,
address[] memory callees,
bytes memory exchangeData,
uint256[] memory startIndexes,
uint256[] memory values,
address payable beneficiary,
string memory referrer,
bool useReduxToken
)
private
returns (uint256 receivedAmount)
{
require(toAmount > 0, "toAmount is too low");
require(
callees.length + 1 == startIndexes.length,
"Start indexes must be 1 greater then number of callees"
);
uint initialGas = gasleft();
//If source token is not ETH than transfer required amount of tokens
//from sender to this contract
transferTokensFromProxy(fromToken, fromAmount);
for (uint256 i = 0; i < callees.length; i++) {
require(
callees[i] != address(_tokenTransferProxy),
"Can not call TokenTransferProxy Contract"
);
bool result = externalCall(
callees[i], //destination
values[i], //value to send
startIndexes[i], // start index of call data
startIndexes[i + 1].sub(startIndexes[i]), // length of calldata
exchangeData// total calldata
);
require(result, "External call failed");
}
receivedAmount = Utils.tokenBalance(
toToken,
address(this)
);
require(
receivedAmount >= toAmount,
"Received amount of tokens are less then expected"
);
takeFeeAndTransferTokens(
toToken,
expectedAmount,
receivedAmount,
beneficiary,
referrer
);
if (useReduxToken) {
Utils.refundGas(msg.sender, address(_tokenTransferProxy), initialGas);
}
return receivedAmount;
}
/**
* @dev This function sends the WETH returned during the exchange to the user.
* @param token: The WETH Address
*/
function withdrawAllWETH(IWETH token) external onlySelf {
uint256 amount = token.balanceOf(address(this));
token.withdraw(amount);
}
/**
* @dev The function which performs the multi path swap.
* @param data Data required to perform swap.
*/
function multiSwap(
Utils.SellData memory data
)
public
payable
returns (uint256)
{
uint initialGas = gasleft();
address fromToken = data.fromToken;
uint256 fromAmount = data.fromAmount;
uint256 toAmount = data.toAmount;
uint256 expectedAmount = data.expectedAmount;
address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
string memory referrer = data.referrer;
Utils.Path[] memory path = data.path;
address toToken = path[path.length - 1].to;
bool useReduxToken = data.useReduxToken;
//Referral can never be empty
require(bytes(referrer).length > 0, "Invalid referrer");
require(toAmount > 0, "To amount can not be 0");
//if fromToken is not ETH then transfer tokens from user to this contract
if (fromToken != Utils.ethAddress()) {
_tokenTransferProxy.transferFrom(
fromToken,
msg.sender,
address(this),
fromAmount
);
}
performSwap(
fromToken,
fromAmount,
path
);
uint256 receivedAmount = Utils.tokenBalance(
toToken,
address(this)
);
require(
receivedAmount >= toAmount,
"Received amount of tokens are less then expected"
);
takeFeeAndTransferTokens(
toToken,
expectedAmount,
receivedAmount,
beneficiary,
referrer
);
if (useReduxToken) {
Utils.refundGas(msg.sender, address(_tokenTransferProxy), initialGas);
}
emit Swapped(
msg.sender,
beneficiary,
fromToken,
toToken,
fromAmount,
receivedAmount,
expectedAmount,
referrer
);
return receivedAmount;
}
/**
* @dev The function which performs the mega path swap.
* @param data Data required to perform swap.
*/
function megaSwap(
Utils.MegaSwapSellData memory data
)
public
payable
returns (uint256)
{
uint initialGas = gasleft();
address fromToken = data.fromToken;
uint256 fromAmount = data.fromAmount;
uint256 toAmount = data.toAmount;
uint256 expectedAmount = data.expectedAmount;
address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
string memory referrer = data.referrer;
Utils.MegaSwapPath[] memory path = data.path;
address toToken = path[0].path[path[0].path.length - 1].to;
bool useReduxToken = data.useReduxToken;
//Referral can never be empty
require(bytes(referrer).length > 0, "Invalid referrer");
require(toAmount > 0, "To amount can not be 0");
//if fromToken is not ETH then transfer tokens from user to this contract
if (fromToken != Utils.ethAddress()) {
_tokenTransferProxy.transferFrom(
fromToken,
msg.sender,
address(this),
fromAmount
);
}
for (uint8 i = 0; i < uint8(path.length); i++) {
uint256 _fromAmount = fromAmount.mul(path[i].fromAmountPercent).div(10000);
if (i == path.length - 1) {
_fromAmount = Utils.tokenBalance(address(fromToken), address(this));
}
performSwap(
fromToken,
_fromAmount,
path[i].path
);
}
uint256 receivedAmount = Utils.tokenBalance(
toToken,
address(this)
);
require(
receivedAmount >= toAmount,
"Received amount of tokens are less then expected"
);
takeFeeAndTransferTokens(
toToken,
expectedAmount,
receivedAmount,
beneficiary,
referrer
);
if (useReduxToken) {
Utils.refundGas(msg.sender, address(_tokenTransferProxy), initialGas);
}
emit Swapped(
msg.sender,
beneficiary,
fromToken,
toToken,
fromAmount,
receivedAmount,
expectedAmount,
referrer
);
return receivedAmount;
}
/**
* @dev The function which performs the single path buy.
* @param data Data required to perform swap.
*/
function buy(
Utils.BuyData memory data
)
public
payable
returns (uint256)
{
address fromToken = data.fromToken;
uint256 fromAmount = data.fromAmount;
uint256 toAmount = data.toAmount;
address payable beneficiary = data.beneficiary == address(0) ? msg.sender : data.beneficiary;
string memory referrer = data.referrer;
Utils.BuyRoute[] memory route = data.route;
address toToken = data.toToken;
bool useReduxToken = data.useReduxToken;
//Referral id can never be empty
require(bytes(referrer).length > 0, "Invalid referrer");
require(toAmount > 0, "To amount can not be 0");
uint256 receivedAmount = performBuy(
fromToken,
toToken,
fromAmount,
toAmount,
route,
useReduxToken
);
takeFeeAndTransferTokens(
toToken,
toAmount,
receivedAmount,
beneficiary,
referrer
);
uint256 remainingAmount = Utils.tokenBalance(
fromToken,
address(this)
);
if (remainingAmount > 0) {
Utils.transferTokens(fromToken, msg.sender, remainingAmount);
}
emit Bought(
msg.sender,
beneficiary,
fromToken,
toToken,
fromAmount,
receivedAmount,
referrer
);
return receivedAmount;
}
//Helper function to transfer final amount to the beneficiaries
function takeFeeAndTransferTokens(
address toToken,
uint256 expectedAmount,
uint256 receivedAmount,
address payable beneficiary,
string memory referrer
)
private
{
uint256 remainingAmount = receivedAmount;
address partnerContract = _partnerRegistry.getPartnerContract(referrer);
//Take partner fee
( uint256 fee ) = _takeFee(
toToken,
receivedAmount,
expectedAmount,
partnerContract
);
remainingAmount = receivedAmount.sub(fee);
//If there is a positive slippage after taking partner fee then 50% goes to paraswap and 50% to the user
if ((remainingAmount > expectedAmount) && fee == 0) {
uint256 positiveSlippageShare = remainingAmount.sub(expectedAmount).div(2);
remainingAmount = remainingAmount.sub(positiveSlippageShare);
Utils.transferTokens(toToken, _feeWallet, positiveSlippageShare);
}
Utils.transferTokens(toToken, beneficiary, remainingAmount);
}
/**
* @dev Source take from GNOSIS MultiSigWallet
* @dev https://github.com/gnosis/MultiSigWallet/blob/master/contracts/MultiSigWallet.sol
*/
function externalCall(
address destination,
uint256 value,
uint256 dataOffset,
uint dataLength,
bytes memory data
)
private
returns (bool)
{
bool result = false;
assembly {
let x := mload(0x40) // "Allocate" memory for output (0x40 is where "free memory" pointer is stored by convention)
let d := add(data, 32) // First 32 bytes are the padded length of data, so exclude that
result := call(
sub(gas(), 34710), // 34710 is the value that solidity is currently emitting
// It includes callGas (700) + callVeryLow (3, to pay for SUB) + callValueTransferGas (9000) +
// callNewAccountGas (25000, in case the destination address does not exist and needs creating)
destination,
value,
add(d, dataOffset),
dataLength, // Size of the input (in bytes) - this is what fixes the padding problem
x,
0 // Output is ignored, therefore the output size is zero
)
}
return result;
}
//Helper function to perform swap
function performSwap(
address fromToken,
uint256 fromAmount,
Utils.Path[] memory path
)
private
{
require(path.length > 0, "Path not provided for swap");
//Assuming path will not be too long to reach out of gas exception
for (uint i = 0; i < path.length; i++) {
//_fromToken will be either fromToken or toToken of the previous path
address _fromToken = i > 0 ? path[i - 1].to : fromToken;
address _toToken = path[i].to;
uint256 _fromAmount = i > 0 ? Utils.tokenBalance(_fromToken, address(this)) : fromAmount;
if (i > 0 && _fromToken == Utils.ethAddress()) {
_fromAmount = _fromAmount.sub(path[i].totalNetworkFee);
}
for (uint j = 0; j < path[i].routes.length; j++) {
Utils.Route memory route = path[i].routes[j];
//Check if exchange is supported
require(
_whitelisted.hasRole(_whitelisted.WHITELISTED_ROLE(), route.exchange),
"Exchange not whitelisted"
);
//Calculating tokens to be passed to the relevant exchange
//percentage should be 200 for 2%
uint fromAmountSlice = _fromAmount.mul(route.percent).div(10000);
uint256 value = route.networkFee;
if (i > 0 && j == path[i].routes.length.sub(1)) {
uint256 remBal = Utils.tokenBalance(address(_fromToken), address(this));
fromAmountSlice = remBal;
if (address(_fromToken) == Utils.ethAddress()) {
//subtract network fee
fromAmountSlice = fromAmountSlice.sub(value);
}
}
//DELEGATING CALL TO THE ADAPTER
(bool success,) = route.exchange.delegatecall(
abi.encodeWithSelector(
IExchange.swap.selector,
_fromToken,
_toToken,
fromAmountSlice,
1,
route.targetExchange,
route.payload
)
);
require(success, "Call to adapter failed");
}
}
}
//Helper function to perform swap
function performBuy(
address fromToken,
address toToken,
uint256 fromAmount,
uint256 toAmount,
Utils.BuyRoute[] memory routes,
bool useReduxToken
)
private
returns(uint256)
{
uint initialGas = gasleft();
//if fromToken is not ETH then transfer tokens from user to this contract
if (fromToken != Utils.ethAddress()) {
_tokenTransferProxy.transferFrom(
fromToken,
msg.sender,
address(this),
fromAmount
);
}
for (uint j = 0; j < routes.length; j++) {
Utils.BuyRoute memory route = routes[j];
//Check if exchange is supported
require(
_whitelisted.hasRole(_whitelisted.WHITELISTED_ROLE(), route.exchange),
"Exchange not whitelisted"
);
//delegate Call to the exchange
(bool success,) = route.exchange.delegatecall(
abi.encodeWithSelector(
IExchange.buy.selector,
fromToken,
toToken,
route.fromAmount,
route.toAmount,
route.targetExchange,
route.payload
)
);
require(success, "Call to adapter failed");
}
uint256 receivedAmount = Utils.tokenBalance(
toToken,
address(this)
);
require(
receivedAmount >= toAmount,
"Received amount of tokens are less then expected tokens"
);
if (useReduxToken) {
Utils.refundGas(msg.sender, address(_tokenTransferProxy), initialGas);
}
return receivedAmount;
}
function _takeFee(
address toToken,
uint256 receivedAmount,
uint256 expectedAmount,
address partnerContract
)
private
returns(uint256 fee)
{
//If there is no partner associated with the referral id then no fee will be taken
if (partnerContract == address(0)) {
return (0);
}
(
address payable partnerFeeWallet,
uint256 feePercent,
uint256 partnerSharePercent,
,
bool positiveSlippageToUser,
bool noPositiveSlippage
) = IPartner(partnerContract).getPartnerInfo();
uint256 partnerShare = 0;
uint256 paraswapShare = 0;
if (!noPositiveSlippage && feePercent <= 50 && receivedAmount > expectedAmount) {
uint256 halfPositiveSlippage = receivedAmount.sub(expectedAmount).div(2);
//Calculate total fee to be taken
fee = expectedAmount.mul(feePercent).div(10000);
//Calculate partner's share
partnerShare = fee.mul(partnerSharePercent).div(10000);
//All remaining fee is paraswap's share
paraswapShare = fee.sub(partnerShare);
paraswapShare = paraswapShare.add(halfPositiveSlippage);
fee = fee.add(halfPositiveSlippage);
if (!positiveSlippageToUser) {
partnerShare = partnerShare.add(halfPositiveSlippage);
fee = fee.add(halfPositiveSlippage);
}
}
else {
//Calculate total fee to be taken
fee = receivedAmount.mul(feePercent).div(10000);
//Calculate partner's share
partnerShare = fee.mul(partnerSharePercent).div(10000);
//All remaining fee is paraswap's share
paraswapShare = fee.sub(partnerShare);
}
Utils.transferTokens(toToken, partnerFeeWallet, partnerShare);
Utils.transferTokens(toToken, _feeWallet, paraswapShare);
emit FeeTaken(fee, partnerShare, paraswapShare);
return (fee);
}
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"inputs":[{"internalType":"address","name":"_reduxToken","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"address","name":"user","type":"address"},{"internalType":"uint256","name":"tokensToFree","type":"uint256"}],"name":"freeReduxTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"reduxToken","outputs":[{"internalType":"contract IReduxToken","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000cb2d80a37898be43579c7b616844
-----Decoded View---------------
Arg [0] : _reduxToken (address): 0x000000000000CB2D80A37898be43579C7b616844
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000cb2d80a37898be43579c7b616844
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://ab62661474abad01a8ead0fb0a1c72f0b0032e0f272241e9e47d63d3fc96b431
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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.