Contract Source Code (Solidity Standard Json-Input format)

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// SPDX-FileCopyrightText: © 2024 Dai Foundation <www.daifoundation.org>
// SPDX-License-Identifier: AGPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

pragma solidity ^0.8.21;

interface PsmLike {
    function gem() external view returns (address);
    function vat() external view returns (address);
    function daiJoin() external view returns (address);
    function pocket() external view returns (address);
    function tin() external view returns (uint256);
    function tout() external view returns (uint256);
    function buf() external view returns (uint256);
    function sellGem(address, uint256) external returns (uint256);
    function buyGem(address, uint256) external returns (uint256);
    function ilk() external view returns (bytes32);
    function vow() external view returns (address);
}

interface GemLike {
    function decimals() external view returns (uint8);
    function approve(address, uint256) external;
    function transferFrom(address, address, uint256) external;
}

interface DaiJoinLike {
    function dai() external view returns (address);
    function join(address, uint256) external;
    function exit(address, uint256) external;
}

interface UsdsJoinLike {
    function usds() external view returns (address);
    function join(address, uint256) external;
    function exit(address, uint256) external;
}

interface VatLike {
    function hope(address) external;
    function live() external view returns (uint256);
}

// A wrapper around the Lite PSM contract
contract UsdsPsmWrapper {
    PsmLike      public   immutable psm;
    GemLike      public   immutable gem;
    UsdsJoinLike public   immutable usdsJoin;
    GemLike      public   immutable usds;
    VatLike      public   immutable vat;
    bytes32      public   immutable ilk;    // For backwards compatibility with the Lite PSM
    address      public   immutable pocket; // For backwards compatibility with the Lite PSM
    uint256      public   immutable dec;    // For backwards compatibility with the Lite PSM
    uint256      public   immutable to18ConversionFactor;
    DaiJoinLike  internal immutable legacyDaiJoin;
    GemLike      internal immutable legacyDai;

    uint256 constant WAD = 10 ** 18;
    uint256 public constant HALTED = type(uint256).max; // For backwards compatibility with the Lite PSM

    constructor(address psm_, address usdsJoin_) {
        psm           = PsmLike(psm_);
        gem           = GemLike(psm.gem());
        usdsJoin      = UsdsJoinLike(usdsJoin_);
        usds          = GemLike(usdsJoin.usds());
        vat           = VatLike(psm.vat());
        ilk           = psm.ilk();
        pocket        = psm.pocket();
        dec           = gem.decimals();
        legacyDaiJoin = DaiJoinLike(psm.daiJoin());
        legacyDai     = GemLike(legacyDaiJoin.dai());

        to18ConversionFactor = 10 ** (18 - gem.decimals());

        legacyDai.approve(address(psm), type(uint256).max);
        gem.approve(address(psm), type(uint256).max);

        legacyDai.approve(address(legacyDaiJoin), type(uint256).max);
        usds.approve(address(usdsJoin), type(uint256).max);

        vat.hope(address(legacyDaiJoin));
        vat.hope(address(usdsJoin));
    }

    function sellGem(address usr, uint256 gemAmt) external returns (uint256 usdsOutWad) {
        gem.transferFrom(msg.sender, address(this), gemAmt);
        usdsOutWad = psm.sellGem(address(this), gemAmt);
        legacyDaiJoin.join(address(this), usdsOutWad);
        usdsJoin.exit(usr, usdsOutWad);
    }

    function buyGem(address usr, uint256 gemAmt) external returns (uint256 usdsInWad) {
        uint256 gemAmt18 = gemAmt * to18ConversionFactor;
        usdsInWad = gemAmt18 + gemAmt18 * psm.tout() / WAD;
        usds.transferFrom(msg.sender, address(this), usdsInWad);
        usdsJoin.join(address(this), usdsInWad);
        legacyDaiJoin.exit(address(this), usdsInWad);
        psm.buyGem(usr, gemAmt);
    }

    // Partial Backward Compatibility Getters With the Lite Psm

    function vow() external view returns (address) {
        return psm.vow();
    }

    function dai() external view returns (address) {
        return address(usds); // Supports not changing integrating code that works with the legacy dai based lite psm
    }

    function gemJoin() external view returns (address) {
        return address(this); // Supports not changing integrating code that queries and approves the gemJoin
    }

    function tin() external view returns (uint256) {
        return psm.tin();
    }

    function tout() external view returns (uint256) {
        return psm.tout();
    }

    function buf() external view returns (uint256) {
        return psm.buf();
    }

    function live() external view returns (uint256) {
        return vat.live();
    }
}

{
  "remappings": [
    "dss-interfaces/=lib/dss-test/lib/dss-interfaces/src/",
    "dss-test/=lib/dss-test/src/",
    "forge-std/=lib/dss-test/lib/forge-std/src/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"psm_","type":"address"},{"internalType":"address","name":"usdsJoin_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"HALTED","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"buf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"gemAmt","type":"uint256"}],"name":"buyGem","outputs":[{"internalType":"uint256","name":"usdsInWad","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"dai","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"dec","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gem","outputs":[{"internalType":"contract GemLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"gemJoin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ilk","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"live","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pocket","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"psm","outputs":[{"internalType":"contract PsmLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"usr","type":"address"},{"internalType":"uint256","name":"gemAmt","type":"uint256"}],"name":"sellGem","outputs":[{"internalType":"uint256","name":"usdsOutWad","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tin","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"to18ConversionFactor","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tout","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"usds","outputs":[{"internalType":"contract GemLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"usdsJoin","outputs":[{"internalType":"contract UsdsJoinLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vat","outputs":[{"internalType":"contract VatLike","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"vow","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000f6e72db5454dd049d0788e411b06cfaf168530420000000000000000000000003c0f895007ca717aa01c8693e59df1e8c3777feb

-----Decoded View---------------
Arg [0] : psm_ (address): 0xf6e72Db5454dd049d0788e411b06CfAF16853042
Arg [1] : usdsJoin_ (address): 0x3C0f895007CA717Aa01c8693e59DF1e8C3777FEB

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000f6e72db5454dd049d0788e411b06cfaf16853042
Arg [1] : 0000000000000000000000003c0f895007ca717aa01c8693e59df1e8c3777feb