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0x57d383eD9BdC4930a5081743a233FD8554a973f7

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Initialize5599612024-12-18 14:05:1917 days ago1734530719IN
0x57d383eD...554a973f7
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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x67Bf022D...aC431c705
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
AaveEcosystemReserveV2

Compiler Version
v0.8.10+commit.fc410830

Optimization Enabled:
Yes with 100000 runs

Other Settings:
berlin EvmVersion, GNU GPLv3 license
File 1 of 9 : AaveEcosystemReserveV2.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.10;

import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';
import {IStreamable} from './interfaces/IStreamable.sol';
import {AdminControlledEcosystemReserve} from './AdminControlledEcosystemReserve.sol';
import {ReentrancyGuard} from './libs/ReentrancyGuard.sol';
import {SafeERC20} from './libs/SafeERC20.sol';

/**
 * @title AaveEcosystemReserve v2
 * @notice Stores ERC20 tokens of an ecosystem reserve, adding streaming capabilities.
 * Modification of Sablier https://github.com/sablierhq/sablier/blob/develop/packages/protocol/contracts/Sablier.sol
 * Original can be found also deployed on https://etherscan.io/address/0xCD18eAa163733Da39c232722cBC4E8940b1D8888
 * Modifications:
 * - Sablier "pulls" the funds from the creator of the stream at creation. In the Aave case, we already have the funds.
 * - Anybody can create streams on Sablier. Here, only the funds admin (Aave governance via controller) can
 * - Adapted codebase to Solidity 0.8.11, mainly removing SafeMath and CarefulMath to use native safe math
 * - Same as with creation, on Sablier the `sender` and `recipient` can cancel a stream. Here, only fund admin and recipient
 * @author BGD Labs
 **/
contract AaveEcosystemReserveV2 is AdminControlledEcosystemReserve, ReentrancyGuard, IStreamable {
  using SafeERC20 for IERC20;

  /*** Storage Properties ***/

  /**
   * @notice Counter for new stream ids.
   */
  uint256 private _nextStreamId;

  /**
   * @notice The stream objects identifiable by their unsigned integer ids.
   */
  mapping(uint256 => Stream) private _streams;

  /*** Modifiers ***/

  /**
   * @dev Throws if the caller is not the funds admin of the recipient of the stream.
   */
  modifier onlyAdminOrRecipient(uint256 streamId) {
    require(
      msg.sender == _fundsAdmin || msg.sender == _streams[streamId].recipient,
      'caller is not the funds admin or the recipient of the stream'
    );
    _;
  }

  /**
   * @dev Throws if the provided id does not point to a valid stream.
   */
  modifier streamExists(uint256 streamId) {
    require(_streams[streamId].isEntity, 'stream does not exist');
    _;
  }

  /*** Contract Logic Starts Here */

  function initialize(address fundsAdmin) external initializer {
    _nextStreamId = 100000;
    _setFundsAdmin(fundsAdmin);
  }

  /*** View Functions ***/

  /**
   * @notice Returns the next available stream id
   * @notice Returns the stream id.
   */
  function getNextStreamId() external view returns (uint256) {
    return _nextStreamId;
  }

  /**
   * @notice Returns the stream with all its properties.
   * @dev Throws if the id does not point to a valid stream.
   * @param streamId The id of the stream to query.
   * @notice Returns the stream object.
   */
  function getStream(
    uint256 streamId
  )
    external
    view
    streamExists(streamId)
    returns (
      address sender,
      address recipient,
      uint256 deposit,
      address tokenAddress,
      uint256 startTime,
      uint256 stopTime,
      uint256 remainingBalance,
      uint256 ratePerSecond
    )
  {
    sender = _streams[streamId].sender;
    recipient = _streams[streamId].recipient;
    deposit = _streams[streamId].deposit;
    tokenAddress = _streams[streamId].tokenAddress;
    startTime = _streams[streamId].startTime;
    stopTime = _streams[streamId].stopTime;
    remainingBalance = _streams[streamId].remainingBalance;
    ratePerSecond = _streams[streamId].ratePerSecond;
  }

  /**
   * @notice Returns either the delta in seconds between `block.timestamp` and `startTime` or
   *  between `stopTime` and `startTime, whichever is smaller. If `block.timestamp` is before
   *  `startTime`, it returns 0.
   * @dev Throws if the id does not point to a valid stream.
   * @param streamId The id of the stream for which to query the delta.
   * @notice Returns the time delta in seconds.
   */
  function deltaOf(uint256 streamId) public view streamExists(streamId) returns (uint256 delta) {
    Stream memory stream = _streams[streamId];
    if (block.timestamp <= stream.startTime) return 0;
    if (block.timestamp < stream.stopTime) return block.timestamp - stream.startTime;
    return stream.stopTime - stream.startTime;
  }

  struct BalanceOfLocalVars {
    uint256 recipientBalance;
    uint256 withdrawalAmount;
    uint256 senderBalance;
  }

  /**
   * @notice Returns the available funds for the given stream id and address.
   * @dev Throws if the id does not point to a valid stream.
   * @param streamId The id of the stream for which to query the balance.
   * @param who The address for which to query the balance.
   * @notice Returns the total funds allocated to `who` as uint256.
   */
  function balanceOf(
    uint256 streamId,
    address who
  ) public view streamExists(streamId) returns (uint256 balance) {
    Stream memory stream = _streams[streamId];
    BalanceOfLocalVars memory vars;

    uint256 delta = deltaOf(streamId);
    vars.recipientBalance = delta * stream.ratePerSecond;

    /*
     * If the stream `balance` does not equal `deposit`, it means there have been withdrawals.
     * We have to subtract the total amount withdrawn from the amount of money that has been
     * streamed until now.
     */
    if (stream.deposit > stream.remainingBalance) {
      vars.withdrawalAmount = stream.deposit - stream.remainingBalance;
      vars.recipientBalance = vars.recipientBalance - vars.withdrawalAmount;
    }

    if (who == stream.recipient) return vars.recipientBalance;
    if (who == stream.sender) {
      vars.senderBalance = stream.remainingBalance - vars.recipientBalance;
      return vars.senderBalance;
    }
    return 0;
  }

  /*** Public Effects & Interactions Functions ***/

  struct CreateStreamLocalVars {
    uint256 duration;
    uint256 ratePerSecond;
  }

  /**
   * @notice Creates a new stream funded by this contracts itself and paid towards `recipient`.
   * @dev Throws if the recipient is the zero address, the contract itself or the caller.
   *  Throws if the deposit is 0.
   *  Throws if the start time is before `block.timestamp`.
   *  Throws if the stop time is before the start time.
   *  Throws if the duration calculation has a math error.
   *  Throws if the deposit is smaller than the duration.
   *  Throws if the deposit is not a multiple of the duration.
   *  Throws if the rate calculation has a math error.
   *  Throws if the next stream id calculation has a math error.
   *  Throws if the contract is not allowed to transfer enough tokens.
   *  Throws if there is a token transfer failure.
   * @param recipient The address towards which the money is streamed.
   * @param deposit The amount of money to be streamed.
   * @param tokenAddress The ERC20 token to use as streaming currency.
   * @param startTime The unix timestamp for when the stream starts.
   * @param stopTime The unix timestamp for when the stream stops.
   * @notice Returns the uint256 id of the newly created stream.
   */
  function createStream(
    address recipient,
    uint256 deposit,
    address tokenAddress,
    uint256 startTime,
    uint256 stopTime
  ) external onlyFundsAdmin returns (uint256) {
    require(recipient != address(0), 'stream to the zero address');
    require(recipient != address(this), 'stream to the contract itself');
    require(recipient != msg.sender, 'stream to the caller');
    require(deposit > 0, 'deposit is zero');
    require(startTime >= block.timestamp, 'start time before block.timestamp');
    require(stopTime > startTime, 'stop time before the start time');

    CreateStreamLocalVars memory vars;
    vars.duration = stopTime - startTime;

    /* Without this, the rate per second would be zero. */
    require(deposit >= vars.duration, 'deposit smaller than time delta');

    /* This condition avoids dealing with remainders */
    require(deposit % vars.duration == 0, 'deposit not multiple of time delta');

    vars.ratePerSecond = deposit / vars.duration;

    /* Create and store the stream object. */
    uint256 streamId = _nextStreamId;
    _streams[streamId] = Stream({
      remainingBalance: deposit,
      deposit: deposit,
      isEntity: true,
      ratePerSecond: vars.ratePerSecond,
      recipient: recipient,
      sender: address(this),
      startTime: startTime,
      stopTime: stopTime,
      tokenAddress: tokenAddress
    });

    /* Increment the next stream id. */
    _nextStreamId++;

    emit CreateStream(
      streamId,
      address(this),
      recipient,
      deposit,
      tokenAddress,
      startTime,
      stopTime
    );
    return streamId;
  }

  /**
   * @notice Withdraws from the contract to the recipient's account.
   * @dev Throws if the id does not point to a valid stream.
   *  Throws if the caller is not the funds admin or the recipient of the stream.
   *  Throws if the amount exceeds the available balance.
   *  Throws if there is a token transfer failure.
   * @param streamId The id of the stream to withdraw tokens from.
   * @param amount The amount of tokens to withdraw.
   */
  function withdrawFromStream(
    uint256 streamId,
    uint256 amount
  ) external nonReentrant streamExists(streamId) onlyAdminOrRecipient(streamId) returns (bool) {
    require(amount > 0, 'amount is zero');
    Stream memory stream = _streams[streamId];

    uint256 balance = balanceOf(streamId, stream.recipient);
    require(balance >= amount, 'amount exceeds the available balance');

    _streams[streamId].remainingBalance = stream.remainingBalance - amount;

    if (_streams[streamId].remainingBalance == 0) delete _streams[streamId];

    IERC20(stream.tokenAddress).safeTransfer(stream.recipient, amount);
    emit WithdrawFromStream(streamId, stream.recipient, amount);
    return true;
  }

  /**
   * @notice Cancels the stream and transfers the tokens back on a pro rata basis.
   * @dev Throws if the id does not point to a valid stream.
   *  Throws if the caller is not the funds admin or the recipient of the stream.
   *  Throws if there is a token transfer failure.
   * @param streamId The id of the stream to cancel.
   * @notice Returns bool true=success, otherwise false.
   */
  function cancelStream(
    uint256 streamId
  ) external nonReentrant streamExists(streamId) onlyAdminOrRecipient(streamId) returns (bool) {
    Stream memory stream = _streams[streamId];
    uint256 senderBalance = balanceOf(streamId, stream.sender);
    uint256 recipientBalance = balanceOf(streamId, stream.recipient);

    delete _streams[streamId];

    IERC20 token = IERC20(stream.tokenAddress);
    if (recipientBalance > 0) token.safeTransfer(stream.recipient, recipientBalance);

    emit CancelStream(streamId, stream.sender, stream.recipient, senderBalance, recipientBalance);
    return true;
  }
}

File 2 of 9 : IERC20.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
  /**
   * @dev Returns the amount of tokens in existence.
   */
  function totalSupply() external view returns (uint256);

  /**
   * @dev Returns the amount of tokens owned by `account`.
   */
  function balanceOf(address account) external view returns (uint256);

  /**
   * @dev Moves `amount` tokens from the caller's account to `recipient`.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transfer(address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Returns the remaining number of tokens that `spender` will be
   * allowed to spend on behalf of `owner` through {transferFrom}. This is
   * zero by default.
   *
   * This value changes when {approve} or {transferFrom} are called.
   */
  function allowance(address owner, address spender) external view returns (uint256);

  /**
   * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * IMPORTANT: Beware that changing an allowance with this method brings the risk
   * that someone may use both the old and the new allowance by unfortunate
   * transaction ordering. One possible solution to mitigate this race
   * condition is to first reduce the spender's allowance to 0 and set the
   * desired value afterwards:
   * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
   *
   * Emits an {Approval} event.
   */
  function approve(address spender, uint256 amount) external returns (bool);

  /**
   * @dev Moves `amount` tokens from `sender` to `recipient` using the
   * allowance mechanism. `amount` is then deducted from the caller's
   * allowance.
   *
   * Returns a boolean value indicating whether the operation succeeded.
   *
   * Emits a {Transfer} event.
   */
  function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

  /**
   * @dev Emitted when `value` tokens are moved from one account (`from`) to
   * another (`to`).
   *
   * Note that `value` may be zero.
   */
  event Transfer(address indexed from, address indexed to, uint256 value);

  /**
   * @dev Emitted when the allowance of a `spender` for an `owner` is set by
   * a call to {approve}. `value` is the new allowance.
   */
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 3 of 9 : AdminControlledEcosystemReserve.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.10;

import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';
import {IAdminControlledEcosystemReserve} from './interfaces/IAdminControlledEcosystemReserve.sol';
import {VersionedInitializable} from './libs/VersionedInitializable.sol';
import {SafeERC20} from './libs/SafeERC20.sol';
import {ReentrancyGuard} from './libs/ReentrancyGuard.sol';
import {Address} from './libs/Address.sol';

/**
 * @title AdminControlledEcosystemReserve
 * @notice Stores ERC20 tokens, and allows to dispose of them via approval or transfer dynamics
 * Adapted to be an implementation of a transparent proxy
 * @dev Done abstract to add an `initialize()` function on the child, with `initializer` modifier
 * @author BGD Labs
 **/
abstract contract AdminControlledEcosystemReserve is
  VersionedInitializable,
  IAdminControlledEcosystemReserve
{
  using SafeERC20 for IERC20;
  using Address for address payable;

  address internal _fundsAdmin;

  uint256 public constant REVISION = 1;

  /// @inheritdoc IAdminControlledEcosystemReserve
  address public constant ETH_MOCK_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;

  modifier onlyFundsAdmin() {
    require(msg.sender == _fundsAdmin, 'ONLY_BY_FUNDS_ADMIN');
    _;
  }

  function getRevision() internal pure override returns (uint256) {
    return REVISION;
  }

  /// @inheritdoc IAdminControlledEcosystemReserve
  function getFundsAdmin() external view returns (address) {
    return _fundsAdmin;
  }

  /// @inheritdoc IAdminControlledEcosystemReserve
  function approve(IERC20 token, address recipient, uint256 amount) external onlyFundsAdmin {
    token.safeApprove(recipient, amount);
  }

  /// @inheritdoc IAdminControlledEcosystemReserve
  function transfer(IERC20 token, address recipient, uint256 amount) external onlyFundsAdmin {
    require(recipient != address(0), 'INVALID_0X_RECIPIENT');

    if (address(token) == ETH_MOCK_ADDRESS) {
      payable(recipient).sendValue(amount);
    } else {
      token.safeTransfer(recipient, amount);
    }
  }

  /// @dev needed in order to receive ETH from the Aave v1 ecosystem reserve
  receive() external payable {}

  function _setFundsAdmin(address admin) internal {
    _fundsAdmin = admin;
    emit NewFundsAdmin(admin);
  }
}

File 4 of 9 : IAdminControlledEcosystemReserve.sol
// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.10;

import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';

interface IAdminControlledEcosystemReserve {
  /** @notice Emitted when the funds admin changes
   * @param fundsAdmin The new funds admin
   **/
  event NewFundsAdmin(address indexed fundsAdmin);

  /** @notice Returns the mock ETH reference address
   * @return address The address
   **/
  function ETH_MOCK_ADDRESS() external pure returns (address);

  /**
   * @notice Return the funds admin, only entity to be able to interact with this contract (controller of reserve)
   * @return address The address of the funds admin
   **/
  function getFundsAdmin() external view returns (address);

  /**
   * @dev Function for the funds admin to give ERC20 allowance to other parties
   * @param token The address of the token to give allowance from
   * @param recipient Allowance's recipient
   * @param amount Allowance to approve
   **/
  function approve(IERC20 token, address recipient, uint256 amount) external;

  /**
   * @notice Function for the funds admin to transfer ERC20 tokens to other parties
   * @param token The address of the token to transfer
   * @param recipient Transfer's recipient
   * @param amount Amount to transfer
   **/
  function transfer(IERC20 token, address recipient, uint256 amount) external;
}

File 5 of 9 : IStreamable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

interface IStreamable {
  struct Stream {
    uint256 deposit;
    uint256 ratePerSecond;
    uint256 remainingBalance;
    uint256 startTime;
    uint256 stopTime;
    address recipient;
    address sender;
    address tokenAddress;
    bool isEntity;
  }

  event CreateStream(
    uint256 indexed streamId,
    address indexed sender,
    address indexed recipient,
    uint256 deposit,
    address tokenAddress,
    uint256 startTime,
    uint256 stopTime
  );

  event WithdrawFromStream(uint256 indexed streamId, address indexed recipient, uint256 amount);

  event CancelStream(
    uint256 indexed streamId,
    address indexed sender,
    address indexed recipient,
    uint256 senderBalance,
    uint256 recipientBalance
  );

  function balanceOf(uint256 streamId, address who) external view returns (uint256 balance);

  function getStream(
    uint256 streamId
  )
    external
    view
    returns (
      address sender,
      address recipient,
      uint256 deposit,
      address token,
      uint256 startTime,
      uint256 stopTime,
      uint256 remainingBalance,
      uint256 ratePerSecond
    );

  function createStream(
    address recipient,
    uint256 deposit,
    address tokenAddress,
    uint256 startTime,
    uint256 stopTime
  ) external returns (uint256 streamId);

  function withdrawFromStream(uint256 streamId, uint256 funds) external returns (bool);

  function cancelStream(uint256 streamId) external returns (bool);

  function initialize(address fundsAdmin) external;
}

File 6 of 9 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
   * ====
   *
   * [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://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
   *
   * IMPORTANT: because control is transferred to `recipient`, care must be
   * taken to not create reentrancy vulnerabilities. Consider using
   * {ReentrancyGuard} or the
   * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
   */
  function sendValue(address payable recipient, uint256 amount) internal {
    require(address(this).balance >= amount, 'Address: insufficient balance');

    (bool success, ) = recipient.call{value: amount}('');
    require(success, 'Address: unable to send value, recipient may have reverted');
  }

  /**
   * @dev Performs a Solidity function call using a low level `call`. A
   * plain `call` is an unsafe replacement for a function call: use this
   * function instead.
   *
   * If `target` reverts with a revert reason, it is bubbled up by this
   * function (like regular Solidity function calls).
   *
   * Returns the raw returned data. To convert to the expected return value,
   * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
   *
   * Requirements:
   *
   * - `target` must be a contract.
   * - calling `target` with `data` must not revert.
   *
   * _Available since v3.1._
   */
  function functionCall(address target, bytes memory data) internal returns (bytes memory) {
    return functionCall(target, data, 'Address: low-level call failed');
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
   * `errorMessage` as a fallback revert reason when `target` reverts.
   *
   * _Available since v3.1._
   */
  function functionCall(
    address target,
    bytes memory data,
    string memory errorMessage
  ) internal returns (bytes memory) {
    return functionCallWithValue(target, data, 0, errorMessage);
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
   * but also transferring `value` wei to `target`.
   *
   * Requirements:
   *
   * - the calling contract must have an ETH balance of at least `value`.
   * - the called Solidity function must be `payable`.
   *
   * _Available since v3.1._
   */
  function functionCallWithValue(
    address target,
    bytes memory data,
    uint256 value
  ) internal returns (bytes memory) {
    return functionCallWithValue(target, data, value, 'Address: low-level call with value failed');
  }

  /**
   * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
   * with `errorMessage` as a fallback revert reason when `target` reverts.
   *
   * _Available since v3.1._
   */
  function functionCallWithValue(
    address target,
    bytes memory data,
    uint256 value,
    string memory errorMessage
  ) internal returns (bytes memory) {
    require(address(this).balance >= value, 'Address: insufficient balance for call');
    require(isContract(target), 'Address: call to non-contract');

    (bool success, bytes memory returndata) = target.call{value: value}(data);
    return verifyCallResult(success, returndata, errorMessage);
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
   * but performing a static call.
   *
   * _Available since v3.3._
   */
  function functionStaticCall(
    address target,
    bytes memory data
  ) internal view returns (bytes memory) {
    return functionStaticCall(target, data, 'Address: low-level static call failed');
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
   * but performing a static call.
   *
   * _Available since v3.3._
   */
  function functionStaticCall(
    address target,
    bytes memory data,
    string memory errorMessage
  ) internal view returns (bytes memory) {
    require(isContract(target), 'Address: static call to non-contract');

    (bool success, bytes memory returndata) = target.staticcall(data);
    return verifyCallResult(success, returndata, errorMessage);
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
   * but performing a delegate call.
   *
   * _Available since v3.4._
   */
  function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
    return functionDelegateCall(target, data, 'Address: low-level delegate call failed');
  }

  /**
   * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
   * but performing a delegate call.
   *
   * _Available since v3.4._
   */
  function functionDelegateCall(
    address target,
    bytes memory data,
    string memory errorMessage
  ) internal returns (bytes memory) {
    require(isContract(target), 'Address: delegate call to non-contract');

    (bool success, bytes memory returndata) = target.delegatecall(data);
    return verifyCallResult(success, returndata, errorMessage);
  }

  /**
   * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
   * revert reason 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 {
      // 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

        assembly {
          let returndata_size := mload(returndata)
          revert(add(32, returndata), returndata_size)
        }
      } else {
        revert(errorMessage);
      }
    }
  }
}

File 7 of 9 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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() {
    // On the first call to nonReentrant, _notEntered will be true
    require(_status != _ENTERED, 'ReentrancyGuard: reentrant call');

    // Any calls to nonReentrant after this point will fail
    _status = _ENTERED;

    _;

    // By storing the original value once again, a refund is triggered (see
    // https://eips.ethereum.org/EIPS/eip-2200)
    _status = _NOT_ENTERED;
  }
}

File 8 of 9 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import {IERC20} from '@aave/core-v3/contracts/dependencies/openzeppelin/contracts/IERC20.sol';
import {Address} from './Address.sol';

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
  using Address for address;

  function safeTransfer(IERC20 token, address to, uint256 value) internal {
    _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
  }

  function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
    _callOptionalReturn(
      token,
      abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
    );
  }

  /**
   * @dev Deprecated. This function has issues similar to the ones found in
   * {IERC20-approve}, and its usage is discouraged.
   *
   * Whenever possible, use {safeIncreaseAllowance} and
   * {safeDecreaseAllowance} instead.
   */
  function safeApprove(IERC20 token, address spender, uint256 value) internal {
    // safeApprove should only be called when setting an initial allowance,
    // or when resetting it to zero. To increase and decrease it, use
    // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
    require(
      (value == 0) || (token.allowance(address(this), spender) == 0),
      'SafeERC20: approve from non-zero to non-zero allowance'
    );
    _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
  }

  function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
    uint256 newAllowance = token.allowance(address(this), spender) + value;
    _callOptionalReturn(
      token,
      abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
    );
  }

  function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
    unchecked {
      uint256 oldAllowance = token.allowance(address(this), spender);
      require(oldAllowance >= value, 'SafeERC20: decreased allowance below zero');
      uint256 newAllowance = oldAllowance - value;
      _callOptionalReturn(
        token,
        abi.encodeWithSelector(token.approve.selector, spender, newAllowance)
      );
    }
  }

  /**
   * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
   * on the return value: the return value is optional (but if data is returned, it must not be false).
   * @param token The token targeted by the call.
   * @param data The call data (encoded using abi.encode or one of its variants).
   */
  function _callOptionalReturn(IERC20 token, bytes memory data) private {
    // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
    // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
    // the target address contains contract code and also asserts for success in the low-level call.

    bytes memory returndata = address(token).functionCall(data, 'SafeERC20: low-level call failed');
    if (returndata.length > 0) {
      // Return data is optional
      require(abi.decode(returndata, (bool)), 'SafeERC20: ERC20 operation did not succeed');
    }
  }
}

File 9 of 9 : VersionedInitializable.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

/**
 * @title VersionedInitializable
 *
 * @dev Helper contract to support initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 *
 * @author Aave, inspired by the OpenZeppelin Initializable contract
 */
abstract contract VersionedInitializable {
  /**
   * @dev Indicates that the contract has been initialized.
   */
  uint256 internal lastInitializedRevision = 0;

  /**
   * @dev Modifier to use in the initializer function of a contract.
   */
  modifier initializer() {
    uint256 revision = getRevision();
    require(revision > lastInitializedRevision, 'Contract instance has already been initialized');

    lastInitializedRevision = revision;

    _;
  }

  /// @dev returns the revision number of the contract.
  /// Needs to be defined in the inherited class as a constant.
  function getRevision() internal pure virtual returns (uint256);

  // Reserved storage space to allow for layout changes in the future.
  uint256[50] private ______gap;
}

Settings
{
  "evmVersion": "berlin",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 100000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"streamId","type":"uint256"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"senderBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"recipientBalance","type":"uint256"}],"name":"CancelStream","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"streamId","type":"uint256"},{"indexed":true,"internalType":"address","name":"sender","type":"address"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"deposit","type":"uint256"},{"indexed":false,"internalType":"address","name":"tokenAddress","type":"address"},{"indexed":false,"internalType":"uint256","name":"startTime","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"stopTime","type":"uint256"}],"name":"CreateStream","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"fundsAdmin","type":"address"}],"name":"NewFundsAdmin","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"streamId","type":"uint256"},{"indexed":true,"internalType":"address","name":"recipient","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"WithdrawFromStream","type":"event"},{"inputs":[],"name":"ETH_MOCK_ADDRESS","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REVISION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"streamId","type":"uint256"},{"internalType":"address","name":"who","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"streamId","type":"uint256"}],"name":"cancelStream","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deposit","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"stopTime","type":"uint256"}],"name":"createStream","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"streamId","type":"uint256"}],"name":"deltaOf","outputs":[{"internalType":"uint256","name":"delta","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getFundsAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getNextStreamId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"streamId","type":"uint256"}],"name":"getStream","outputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"deposit","type":"uint256"},{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"startTime","type":"uint256"},{"internalType":"uint256","name":"stopTime","type":"uint256"},{"internalType":"uint256","name":"remainingBalance","type":"uint256"},{"internalType":"uint256","name":"ratePerSecond","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"fundsAdmin","type":"address"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"streamId","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawFromStream","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

Deployed Bytecode

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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.