Contract 0x543ff59e8bc8844dcb2fc5116d8ff972305ae0d4

 

Contract Overview

Pana DAO: KARSHA Token
Balance:
0 ETH

ETH Value:
$0.00
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x34fb3df808dbd91d15abab67f2ff84e8ee74708e690e9aece49a5d5e76508164Approve877397362023-05-06 1:48:32327 days 17 hrs ago0xdabc0f2c11b9871c1d648b51b88b77fbe6527a7f IN  Pana DAO: KARSHA Token0 ETH0.0001751 0.1
0x15fd19e90eae6de121d029249d33f1d11320643aaf21551963dc6b2a8bba5a8cApprove713197242023-03-19 4:55:58375 days 14 hrs ago0xa5b33f4372369427e3946965a374b40e7739c940 IN  Pana DAO: KARSHA Token0 ETH0.00003148 0.1
0xb3122290f0dda3f0e0fabea1f6c4fe4276736c697f285df9db0f942c32a416aaApprove693831592023-03-13 8:24:51381 days 11 hrs ago0x4349d8154a9165673e703a1b8efd40bfc27526d4 IN  Pana DAO: KARSHA Token0 ETH0.000035660.1
0x8e42d084a8fe9e8ba3d29acddca4942cc7969a42f05f01c2b0dc27e595f19dc4Transfer645411692023-02-25 20:11:05396 days 23 hrs ago0x8ea355e9497f125287ce31d81cf3059e9b0c2631 IN  Pana DAO: KARSHA Token0 ETH0.00004271 0.1
0x579c2dd5189c4872230f7f1526bd165377a6a79e21e73bd00a656b38ea612601Transfer601110922023-02-11 23:49:49410 days 19 hrs ago0x63578db8b28c2078252212a4e25d4ac27d5f89e0 IN  Pana DAO: KARSHA Token0 ETH0.00003473 0.1
0x08b0b8648344edd3612c7b9d5a81d138cca41131f1e8d8948888204b0b6b66afTransfer601110162023-02-11 23:49:05410 days 19 hrs ago0x2d6ac00c9b12c6b180d3fc047bfb39b7c68ea242 IN  Pana DAO: KARSHA Token0 ETH0.00003507 0.1
0x0598b9e18e90428566d83a5e3979cdca8ed295bfc6d42bc0003cc7b8a8430e68Transfer601108092023-02-11 23:47:28410 days 19 hrs ago0x795eaa3919c5813e74472744b95cbab5d2f0b3f3 IN  Pana DAO: KARSHA Token0 ETH0.00003661 0.1
0xd2658d94e8e53423553a48de85a49590f099a217ee42480b7b12bbe9c3bc5929Approve572760552023-02-01 23:19:17420 days 20 hrs ago0x5193db76691ac46206ee7a3e123de01245b4cf40 IN  Pana DAO: KARSHA Token0 ETH0.00006617 0.1
0xc6bc4a4dbbe68a1110f761b3be8a31b07051682abaa13efcfacc9bf528d6d2ddApprove569934742023-01-31 22:09:59421 days 21 hrs ago0x63578db8b28c2078252212a4e25d4ac27d5f89e0 IN  Pana DAO: KARSHA Token0 ETH0.0000669 0.1
0x806313de6466f36f8a0a19a0ad90aa65135f27730093891dff4c4ee6b1d2a2d8Approve569931102023-01-31 22:08:16421 days 21 hrs ago0x795eaa3919c5813e74472744b95cbab5d2f0b3f3 IN  Pana DAO: KARSHA Token0 ETH0.00007243 0.1
0x0daf7dd6126880798cebd3eeb3fe5e0e1c2a465e996f08bb3c039a67659f7b9aTransfer569826672023-01-31 21:14:02421 days 22 hrs ago0x1029f820bb76b3b3e1e03d854c7602734ce8c651 IN  Pana DAO: KARSHA Token0 ETH0.00006524 0.1
0x8df207cbed8b5d7f0a6c62e0cc505363c2c9b6aec6963c303343732731e8893bTransfer569823612023-01-31 21:12:19421 days 22 hrs ago0x1029f820bb76b3b3e1e03d854c7602734ce8c651 IN  Pana DAO: KARSHA Token0 ETH0.00006571 0.1
0xdbb96aaf0e7d56a1e22e46ec67b774f407b498ae633a58ca53d5d17248a71015Approve567242032023-01-30 20:24:08422 days 23 hrs ago0x2d6ac00c9b12c6b180d3fc047bfb39b7c68ea242 IN  Pana DAO: KARSHA Token0 ETH0.00005746 0.1
0x2469ffde37249d19b310def845bad058cb3e2e5b3ea043565e5b6324d9b4ba90Approve564156612023-01-29 17:16:15424 days 2 hrs ago0x7be32190698fc4878e1e31a77ae99eaae64747d6 IN  Pana DAO: KARSHA Token0 ETH0.00003599 0.1
0x239df0a5f926ce2c9ade545c0e957b9db445709df471ded0c564ea83d02f8fbeApprove561517032023-01-28 14:35:47425 days 5 hrs ago0x56798501ee74cff912e42f757fe3e3349fb225fa IN  Pana DAO: KARSHA Token0 ETH0.00003059 0.1
0x0ae8b6317d3030f865d1956365bbe19f8d798592679b2bba495a42c18c52d4b2Transfer556249442023-01-26 14:39:48427 days 5 hrs ago0x4d549c400bbd7cdd055812cff7e60bca8fbd18c3 IN  Pana DAO: KARSHA Token0 ETH0.00003362 0.1
0xd90336c64b0e8f8378fc53ee8cae54d83f41c45b97481281c054fdd210179a1bApprove549770782023-01-23 18:29:56430 days 1 hr ago0x39fe38a5320bf236d229ef2c749c023d096f3c86 IN  Pana DAO: KARSHA Token0 ETH0.00006765 0.1
0x66baeb7d895c0f73e9829f5f4ab0e0d94e5179d1d43810a6dc5fe78db853a423Approve546273472023-01-22 2:32:24431 days 17 hrs ago0x4d549c400bbd7cdd055812cff7e60bca8fbd18c3 IN  Pana DAO: KARSHA Token0 ETH0.000034 0.1
0x5065c688d269e700230cb34691af04e4678554349361b5823dbdf7b7ac55e273Transfer532842522023-01-15 16:16:36438 days 3 hrs ago0x1029f820bb76b3b3e1e03d854c7602734ce8c651 IN  Pana DAO: KARSHA Token0 ETH0.00004883 0.1
0x93a07340d08558b8533ba2ef62c6e817532b52586a897a557a6c9d311f539af5Transfer530307582023-01-14 13:50:21439 days 5 hrs ago0x1029f820bb76b3b3e1e03d854c7602734ce8c651 IN  Pana DAO: KARSHA Token0 ETH0.00003132 0.1
0x31765a833e2ff465a23c9ca8418b7e864aa2aa4916bea05afc3ffed225b52e26Transfer530303392023-01-14 13:48:09439 days 5 hrs ago0x1029f820bb76b3b3e1e03d854c7602734ce8c651 IN  Pana DAO: KARSHA Token0 ETH0.0000343 0.1
0xe1473a8285b9b3ce70392a013ac27b873b4aa7253e9db50eb3ac8fad62934bc5Approve523739692023-01-11 19:10:05442 days 35 mins ago0x8567eff4f7b8cf733976ff4839c915ff5995c943 IN  Pana DAO: KARSHA Token0 ETH0.00005926 0.1
0x4f0dc5cac9b34dc88f0a00d4265b172ab0fe8644a9ac5bcc98da43f392cba658Approve502266002023-01-01 22:41:32451 days 21 hrs ago0x3028872d2cd31517524121940c914099337f1b7e IN  Pana DAO: KARSHA Token0 ETH0.00003213 0.1
0x16131f855eb3e8733061a6ebb556adb140f0e9620abc9ab678f821a408310dacApprove500748542022-12-31 21:59:38452 days 21 hrs ago0xa8d0b012e7266cf49f1f86681f484032d184512c IN  Pana DAO: KARSHA Token0 ETH0.00003369 0.1
0xe1fab94899aa3624a4c7ca6e12815bb942f6de5f976903ab45e60baa66019344Approve463969262022-12-15 14:39:26469 days 5 hrs ago0x0acc0a8f5db08e2836f171aaad599dd5a23590c5 IN  Pana DAO: KARSHA Token0 ETH0.00004004 0.1
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OVERVIEW

Pana is a decentralized finance protocol which offers parametric insurance leveraging NFT technology and programmable syndicates model. Karsha is a rebasing, governance token which can be purchased by bonding with Pana DAO.

Latest 25 internal transaction
Parent Txn Hash Block From To Value
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago 0x2470afe23390edd072479f0a2d610ace1b39eaba Pana DAO: KARSHA Token0 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0xe037aa7db30215d75cc5b87005d1445b3abbabb3e6af03593fa82197d45ce1cc713207452023-03-19 5:00:20375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0x6baf949be348f6df135df9dc15102971654749fe Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0x572266ac67c92bdc066d36287dcc36978b9ee2fd4bc5ca92d9cfcd573cabc1a1713197722023-03-19 4:56:10375 days 14 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
0xb3bab4a6e24f60b1bfa1f3c32b4c08cd07e06f681718927921940eccb5c5a64b713196352023-03-19 4:55:35375 days 14 hrs ago 0x2470afe23390edd072479f0a2d610ace1b39eaba Pana DAO: KARSHA Token0 ETH
0x75271d4f3f788e2ce8601a9f9edf6fb798288e18d0b827faccb8a4db809b3c83712083952023-03-18 20:52:47375 days 22 hrs ago Pana DAO: KARSHA Token 0xc2786a608b8ba6f9df87d8e0b8777bf158b610930 ETH
0x75271d4f3f788e2ce8601a9f9edf6fb798288e18d0b827faccb8a4db809b3c83712083952023-03-18 20:52:47375 days 22 hrs ago 0xc2786a608b8ba6f9df87d8e0b8777bf158b61093 Pana DAO: KARSHA Token0 ETH
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Loading

Contract Source Code Verified (Exact Match)

Contract Name:
Karsha

Compiler Version
v0.7.5+commit.eb77ed08

Optimization Enabled:
Yes with 800 runs

Other Settings:
default evmVersion, GNU AGPLv3 license
File 1 of 9 : PanaAccessControlled.sol
// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.7.5;

import "../interfaces/IPanaAuthority.sol";

abstract contract PanaAccessControlled {

    /* ========== EVENTS ========== */

    event AuthorityUpdated(IPanaAuthority indexed authority);

    string UNAUTHORIZED = "UNAUTHORIZED"; // save gas

    /* ========== STATE VARIABLES ========== */

    IPanaAuthority public authority;


    /* ========== Constructor ========== */

    constructor(IPanaAuthority _authority) {
        authority = _authority;
        emit AuthorityUpdated(_authority);
    }
    

    /* ========== MODIFIERS ========== */
    
    modifier onlyGovernor() {
        require(msg.sender == authority.governor(), UNAUTHORIZED);
        _;
    }
    
    modifier onlyGuardian() {
        require(msg.sender == authority.guardian(), UNAUTHORIZED);
        _;
    }
    
    modifier onlyPolicy() {
        require(msg.sender == authority.policy(), UNAUTHORIZED);
        _;
    }

    modifier onlyVault() {
        require(msg.sender == authority.vault(), UNAUTHORIZED);
        _;
    }
    
    /* ========== GOV ONLY ========== */
    
    function setAuthority(IPanaAuthority _newAuthority) external onlyGovernor {
        authority = _newAuthority;
        emit AuthorityUpdated(_newAuthority);
    }
}

File 2 of 9 : IERC20.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.7.5;

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 : IKarsha.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.7.5;

import "./IERC20.sol";

interface IKarsha is IERC20 {
  function mint(address _to, uint256 _amount) external;

  function burn(address _from, uint256 _amount) external;

  function index() external view returns (uint256);
  
  function balanceOfPANA(address _address) external view returns (uint256);

  function balanceFrom(uint256 _amount) external view returns (uint256);

  function balanceTo(uint256 _amount) external view returns (uint256);

  function transfer(address _to,uint256 _amount) external override returns (bool);
  function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool);
}

File 4 of 9 : IPanaAuthority.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.7.5;

interface IPanaAuthority {
    /* ========== EVENTS ========== */
    
    event GovernorPushed(address indexed from, address indexed to, bool _effectiveImmediately);
    event GuardianPushed(address indexed from, address indexed to, bool _effectiveImmediately);
    event PolicyPushed(address indexed from, address indexed to, bool _effectiveImmediately);
    event VaultPushed(address indexed from, address indexed to, bool _effectiveImmediately);
    event DistributionVaultPushed(address indexed from, address indexed to, bool _effectiveImmediately); 

    event GovernorPulled(address indexed from, address indexed to);
    event GuardianPulled(address indexed from, address indexed to);
    event PolicyPulled(address indexed from, address indexed to);
    event VaultPulled(address indexed from, address indexed to);
    event DistributionVaultPulled(address indexed from, address indexed to);

    /* ========== VIEW ========== */
    
    function governor() external view returns (address);
    function guardian() external view returns (address);
    function policy() external view returns (address);
    function vault() external view returns (address);
    function distributionVault() external view returns (address);
}

File 5 of 9 : IsPana.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.7.5;

import "./IERC20.sol";

interface IsPana is IERC20 {
    function rebase( uint256 panaProfit_, uint epoch_) external returns (uint256);

    function circulatingSupply() external view returns (uint256);

    function gonsForBalance( uint amount ) external view returns ( uint );

    function balanceForGons( uint gons ) external view returns ( uint );

    function index() external view returns ( uint );

    function toKARSHA(uint amount) external view returns (uint);

    function fromKARSHA(uint amount) external view returns (uint);
    
}

File 6 of 9 : Address.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.7.5;


// TODO(zx): replace with OZ implementation.
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

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

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

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

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

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        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);
            }
        }
    }

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

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

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

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

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }

    function addressToString(address _address) internal pure returns(string memory) {
        bytes32 _bytes = bytes32(uint256(_address));
        bytes memory HEX = "0123456789abcdef";
        bytes memory _addr = new bytes(42);

        _addr[0] = '0';
        _addr[1] = 'x';

        for(uint256 i = 0; i < 20; i++) {
            _addr[2+i*2] = HEX[uint8(_bytes[i + 12] >> 4)];
            _addr[3+i*2] = HEX[uint8(_bytes[i + 12] & 0x0f)];
        }

        return string(_addr);

    }
}

File 7 of 9 : SafeMath.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.7.5;


// TODO(zx): Replace all instances of SafeMath with OZ implementation
library SafeMath {

    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by 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;
    }

    // Only used in the  BondingCalculator.sol
    function sqrrt(uint256 a) internal pure returns (uint c) {
        if (a > 3) {
            c = a;
            uint b = add( div( a, 2), 1 );
            while (b < c) {
                c = b;
                b = div( add( div( a, b ), b), 2 );
            }
        } else if (a != 0) {
            c = 1;
        }
    }

}

File 8 of 9 : Karsha.sol
// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.7.5;

import "../../libraries/SafeMath.sol";
import "../../libraries/Address.sol";

import "../../interfaces/IsPana.sol";
import "../../interfaces/IKarsha.sol";
import "../../types/ERC20.sol";
import "../../access/PanaAccessControlled.sol";

contract Karsha is IKarsha, ERC20, PanaAccessControlled {

    /* ========== DEPENDENCIES ========== */

    using Address for address;
    using SafeMath for uint256;

    /* ========== MODIFIERS ========== */

    modifier onlyStaking() {
        require(msg.sender == staking, "Only Staking");
        _;
    }

    /* ========== EVENTS ========== */

    event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
    event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);

    /* ========== DATA STRUCTURES ========== */

    /// @notice A checkpoint for marking number of votes from a given block
    struct Checkpoint {
        uint256 fromBlock;
        uint256 votes;
    }

    /* ========== STATE VARIABLES ========== */

    IsPana public sPANA;
    address public staking; // minter

    mapping(address => mapping(uint256 => Checkpoint)) public checkpoints;
    mapping(address => uint256) public numCheckpoints;
    mapping(address => address) public delegates;

    /* ========== CONSTRUCTOR ========== */

    constructor(address _staking, address _sPana, address _authority)
        ERC20("Karsha", "KARSHA", 18)
        PanaAccessControlled(IPanaAuthority(_authority))
    {
        require(_sPana != address(0), "Zero address: sPANA");
        sPANA = IsPana(_sPana);
    }

    function setStaking(address _newStaking) external onlyGovernor {
        require(_newStaking != address(0), "Zero address found: Staking");
        staking = _newStaking;
    }

    /**
     * @notice Delegate votes from `msg.sender` to `delegatee`
     * @param delegatee The address to delegate votes to
     */
    function delegate(address delegatee) external {
        return _delegate(msg.sender, delegatee);
    }

    /**
        @notice mint KARSHA
        @param _to address
        @param _amount uint
     */
    function mint(address _to, uint256 _amount) external override onlyStaking {
        _mint(_to, _amount);
    }

    /**
        @notice burn KARSHA
        @param _from address
        @param _amount uint
     */
    function burn(address _from, uint256 _amount) external override onlyStaking {
        require(balanceOf(_from) >= _amount, "ERC20: burn amount exceeds balance");
        _burn(_from, _amount);
    }

    /**
        @notice transfer KARSHA
        @param _to address
        @param _amount uint
     */
    function transfer(address _to, uint256 _amount) public override(IKarsha,ERC20) returns (bool){
        require(balanceOf(msg.sender) >= _amount, "ERC20: transfer amount exceeds balance");                 
        return super.transfer(_to,_amount);
    }

    /**
        @notice transferFrom KARSHA
        @param sender address
        @param recipient address
        @param amount uint
     */
    function transferFrom(address sender, address recipient, uint256 amount) public override(IKarsha,ERC20) returns (bool) {
        require(balanceOf(sender) >= amount, "ERC20: transfer amount exceeds balance");  
        return super.transferFrom(sender,recipient,amount);
    }

    /* ========== VIEW FUNCTIONS ========== */

    /**
     * @notice pull index from sPANA token
     */
    function index() public view override returns (uint256) {
        return sPANA.index();
    }

    /**
        @notice converts KARSHA balance to PANA
        @param _address address
        @return uint
     */
    function balanceOfPANA(address _address) public view override returns (uint256) {
        return balanceFrom(balanceOf(_address));
    }

    /**
        @notice converts KARSHA amount to PANA
        @param _amount uint
        @return uint
     */
    function balanceFrom(uint256 _amount) public view override returns (uint256) {
        return _amount.mul(index()).div(10**decimals());
    }

    /**
        @notice converts PANA amount to KARSHA
        @param _amount uint
        @return uint
     */
    function balanceTo(uint256 _amount) public view override returns (uint256) {
        return _amount.mul(10**decimals()).div(index());
    }

    /**
     * @notice Gets the current votes balance for `account`
     * @param account The address to get votes balance
     * @return The number of current votes for `account`
     */
    function getCurrentVotes(address account) external view returns (uint256) {
        uint256 nCheckpoints = numCheckpoints[account];
        return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
    }

    /**
     * @notice Determine the prior number of votes for an account as of a block number
     * @dev Block number must be a finalized block or else this function will revert to prevent misinformation.
     * @param account The address of the account to check
     * @param blockNumber The block number to get the vote balance at
     * @return The number of votes the account had as of the given block
     */
    function getPriorVotes(address account, uint256 blockNumber) external view returns (uint256) {
        require(blockNumber < block.number, "KARSHA::getPriorVotes: not yet determined");

        uint256 nCheckpoints = numCheckpoints[account];
        if (nCheckpoints == 0) {
            return 0;
        }

        // First check most recent balance
        if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
            return checkpoints[account][nCheckpoints - 1].votes;
        }

        // Next check implicit zero balance
        if (checkpoints[account][0].fromBlock > blockNumber) {
            return 0;
        }

        uint256 lower = 0;
        uint256 upper = nCheckpoints - 1;
        while (upper > lower) {
            uint256 center = upper - (upper - lower) / 2; // ceil, avoiding overflow
            Checkpoint memory cp = checkpoints[account][center];
            if (cp.fromBlock == blockNumber) {
                return cp.votes;
            } else if (cp.fromBlock < blockNumber) {
                lower = center;
            } else {
                upper = center - 1;
            }
        }
        return checkpoints[account][lower].votes;
    }

    /* ========== INTERNAL FUNCTIONS ========== */

    function _delegate(address delegator, address delegatee) internal {
        address currentDelegate = delegates[delegator];
        uint256 delegatorBalance = _balances[delegator];
        delegates[delegator] = delegatee;

        emit DelegateChanged(delegator, currentDelegate, delegatee);

        _moveDelegates(currentDelegate, delegatee, delegatorBalance);
    }

    function _moveDelegates(
        address srcRep,
        address dstRep,
        uint256 amount
    ) internal {
        if (srcRep != dstRep && amount > 0) {
            if (srcRep != address(0)) {
                uint256 srcRepNum = numCheckpoints[srcRep];
                uint256 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
                uint256 srcRepNew = srcRepOld.sub(amount);
                _writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
            }

            if (dstRep != address(0)) {
                uint256 dstRepNum = numCheckpoints[dstRep];
                uint256 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
                uint256 dstRepNew = dstRepOld.add(amount);
                _writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
            }
        }
    }

    function _writeCheckpoint(
        address delegatee,
        uint256 nCheckpoints,
        uint256 oldVotes,
        uint256 newVotes
    ) internal {
        if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == block.number) {
            checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
        } else {
            checkpoints[delegatee][nCheckpoints] = Checkpoint(block.number, newVotes);
            numCheckpoints[delegatee] = nCheckpoints + 1;
        }

        emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
    }

    /**
        @notice Ensure delegation moves when token is transferred.
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal override {
        _moveDelegates(delegates[from], delegates[to], amount);
    }
}

File 9 of 9 : ERC20.sol
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity >=0.7.5;

import "../libraries/SafeMath.sol";

import "../interfaces/IERC20.sol";


abstract contract ERC20 is IERC20 {

    using SafeMath for uint256;

    // TODO comment actual hash value.
    bytes32 constant private ERC20TOKEN_ERC1820_INTERFACE_ID = keccak256( "ERC20Token" );
    
    mapping (address => uint256) internal _balances;

    mapping (address => mapping (address => uint256)) internal _allowances;

    uint256 internal _totalSupply;

    string internal _name;
    
    string internal _symbol;
    
    uint8 internal immutable _decimals;

    constructor (string memory name_, string memory symbol_, uint8 decimals_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
    }

    function name() public view returns (string memory) {
        return _name;
    }

    function symbol() public view returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual returns (uint8) {
        return _decimals;
    }

    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual override returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].add(addedValue));
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(msg.sender, spender, _allowances[msg.sender][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);        
        emit Transfer(sender, recipient, amount);
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");
        _beforeTokenTransfer(address(0), account, amount);
        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    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);
    }

  function _beforeTokenTransfer( address from_, address to_, uint256 amount_ ) internal virtual { }
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "none",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 800
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract ABI

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IPanaAuthority","name":"authority","type":"address"}],"name":"AuthorityUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegator","type":"address"},{"indexed":true,"internalType":"address","name":"fromDelegate","type":"address"},{"indexed":true,"internalType":"address","name":"toDelegate","type":"address"}],"name":"DelegateChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"delegate","type":"address"},{"indexed":false,"internalType":"uint256","name":"previousBalance","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newBalance","type":"uint256"}],"name":"DelegateVotesChanged","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":"","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":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"authority","outputs":[{"internalType":"contract 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IsPana","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract 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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000002a3babda298d348dea69da98b2f6a7f4df31e42000000000000000000000000c2786a608b8ba6f9df87d8e0b8777bf158b61093000000000000000000000000cc654fbb3c1b12be82d36bc9c7e1ce075a422f80

-----Decoded View---------------
Arg [0] : _staking (address): 0x02A3babda298d348Dea69DA98B2F6a7F4Df31e42
Arg [1] : _sPana (address): 0xC2786A608B8bA6F9dF87D8e0b8777BF158b61093
Arg [2] : _authority (address): 0xcc654fbB3C1B12Be82D36Bc9C7E1CE075A422F80

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000002a3babda298d348dea69da98b2f6a7f4df31e42
Arg [1] : 000000000000000000000000c2786a608b8ba6f9df87d8e0b8777bf158b61093
Arg [2] : 000000000000000000000000cc654fbb3c1b12be82d36bc9c7e1ce075a422f80


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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