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Latest 22 from a total of 22 transactions
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Revoke Request N... | 20418773 | 7 hrs ago | IN | 0 ETH | 0.00085913 | ||||
Revoke Request N... | 20418749 | 7 hrs ago | IN | 0 ETH | 0.00095757 | ||||
Revoke Request N... | 20404741 | 2 days ago | IN | 0 ETH | 0.00011167 | ||||
Revoke Request N... | 20404733 | 2 days ago | IN | 0 ETH | 0.00011076 | ||||
Revoke Request N... | 20397697 | 3 days ago | IN | 0 ETH | 0.00012227 | ||||
Revoke Request N... | 20383749 | 5 days ago | IN | 0 ETH | 0.00030297 | ||||
Revoke Request N... | 20276010 | 20 days ago | IN | 0 ETH | 0.00030829 | ||||
Revoke Request N... | 20255187 | 23 days ago | IN | 0 ETH | 0.00014698 | ||||
Revoke Request N... | 20160146 | 36 days ago | IN | 0 ETH | 0.00030921 | ||||
Revoke Request N... | 20011981 | 57 days ago | IN | 0 ETH | 0.00128187 | ||||
Revoke Request N... | 19988677 | 60 days ago | IN | 0 ETH | 0.00041845 | ||||
Revoke Request N... | 19863540 | 77 days ago | IN | 0 ETH | 0.00047244 | ||||
Revoke Request N... | 19602530 | 114 days ago | IN | 0 ETH | 0.00079829 | ||||
Revoke Request N... | 19601864 | 114 days ago | IN | 0 ETH | 0.00036162 | ||||
Revoke Request N... | 19601856 | 114 days ago | IN | 0 ETH | 0.00052925 | ||||
Revoke Request N... | 19598675 | 114 days ago | IN | 0 ETH | 0.00064124 | ||||
Revoke Request N... | 19427086 | 139 days ago | IN | 0 ETH | 0.00234229 | ||||
Revoke Request N... | 19427041 | 139 days ago | IN | 0 ETH | 0.00384986 | ||||
Revoke Request N... | 19373273 | 146 days ago | IN | 0 ETH | 0.00314008 | ||||
Revoke Request N... | 19293439 | 157 days ago | IN | 0 ETH | 0.00141249 | ||||
Revoke Request N... | 19293277 | 157 days ago | IN | 0 ETH | 0.00154075 | ||||
Revoke Request N... | 19229143 | 166 days ago | IN | 0 ETH | 0.00153944 |
Latest 1 internal transaction
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17677232 | 384 days ago | Contract Creation | 0 ETH |
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Contract Name:
PWNSimpleLoanSimpleRequest
Compiler Version
v0.8.16+commit.07a7930e
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "MultiToken/MultiToken.sol"; import "@pwn/loan/lib/PWNSignatureChecker.sol"; import "@pwn/loan/terms/simple/factory/request/base/PWNSimpleLoanRequest.sol"; import "@pwn/loan/terms/PWNLOANTerms.sol"; import "@pwn/PWNErrors.sol"; /** * @title PWN Simple Loan Simple Request * @notice Loan terms factory contract creating a simple loan terms from a simple request. */ contract PWNSimpleLoanSimpleRequest is PWNSimpleLoanRequest { string internal constant VERSION = "1.1"; /*----------------------------------------------------------*| |* # VARIABLES & CONSTANTS DEFINITIONS *| |*----------------------------------------------------------*/ /** * @dev EIP-712 simple request struct type hash. */ bytes32 constant internal REQUEST_TYPEHASH = keccak256( "Request(uint8 collateralCategory,address collateralAddress,uint256 collateralId,uint256 collateralAmount,address loanAssetAddress,uint256 loanAmount,uint256 loanYield,uint32 duration,uint40 expiration,address borrower,address lender,uint256 nonce)" ); bytes32 immutable internal DOMAIN_SEPARATOR; /** * @notice Construct defining a simple request. * @param collateralCategory Category of an asset used as a collateral (0 == ERC20, 1 == ERC721, 2 == ERC1155). * @param collateralAddress Address of an asset used as a collateral. * @param collateralId Token id of an asset used as a collateral, in case of ERC20 should be 0. * @param collateralAmount Amount of tokens used as a collateral, in case of ERC721 should be 0. * @param loanAssetAddress Address of an asset which is lender to a borrower. * @param loanAmount Amount of tokens which is requested as a loan to a borrower. * @param loanYield Amount of tokens which acts as a lenders loan interest. Borrower has to pay back a borrowed amount + yield. * @param duration Loan duration in seconds. * @param expiration Request expiration timestamp in seconds. * @param borrower Address of a borrower. This address has to sign a request to be valid. * @param lender Address of a lender. Only this address can accept a request. If the address is zero address, anybody with a loan asset can accept the request. * @param nonce Additional value to enable identical requests in time. Without it, it would be impossible to make again request, which was once revoked. * Can be used to create a group of requests, where accepting one request will make other requests in the group revoked. */ struct Request { MultiToken.Category collateralCategory; address collateralAddress; uint256 collateralId; uint256 collateralAmount; address loanAssetAddress; uint256 loanAmount; uint256 loanYield; uint32 duration; uint40 expiration; address borrower; address lender; uint256 nonce; } /*----------------------------------------------------------*| |* # CONSTRUCTOR *| |*----------------------------------------------------------*/ constructor(address hub, address revokedRequestNonce) PWNSimpleLoanRequest(hub, revokedRequestNonce) { DOMAIN_SEPARATOR = keccak256(abi.encode( keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"), keccak256("PWNSimpleLoanSimpleRequest"), keccak256("1"), block.chainid, address(this) )); } /*----------------------------------------------------------*| |* # REQUEST MANAGEMENT *| |*----------------------------------------------------------*/ /** * @notice Make an on-chain request. * @dev Function will mark a request hash as proposed. Request will become acceptable by a lender without a request signature. * @param request Request struct containing all needed request data. */ function makeRequest(Request calldata request) external { _makeRequest(getRequestHash(request), request.borrower); } /*----------------------------------------------------------*| |* # IPWNSimpleLoanFactory *| |*----------------------------------------------------------*/ /** * @notice See { IPWNSimpleLoanFactory.sol }. */ function createLOANTerms( address caller, bytes calldata factoryData, bytes calldata signature ) external override onlyActiveLoan returns (PWNLOANTerms.Simple memory loanTerms, bytes32 requestHash) { Request memory request = abi.decode(factoryData, (Request)); requestHash = getRequestHash(request); address lender = caller; address borrower = request.borrower; // Check that request has been made via on-chain tx, EIP-1271 or signed off-chain if (requestsMade[requestHash] == false) if (PWNSignatureChecker.isValidSignatureNow(borrower, requestHash, signature) == false) revert InvalidSignature(); // Check valid request if (request.expiration != 0 && block.timestamp >= request.expiration) revert RequestExpired(); if (revokedRequestNonce.isNonceRevoked(borrower, request.nonce) == true) revert NonceAlreadyRevoked(); if (request.lender != address(0)) if (lender != request.lender) revert CallerIsNotStatedLender(request.lender); if (request.duration < MIN_LOAN_DURATION) revert InvalidDuration(); // Prepare collateral and loan asset MultiToken.Asset memory collateral = MultiToken.Asset({ category: request.collateralCategory, assetAddress: request.collateralAddress, id: request.collateralId, amount: request.collateralAmount }); MultiToken.Asset memory loanAsset = MultiToken.Asset({ category: MultiToken.Category.ERC20, assetAddress: request.loanAssetAddress, id: 0, amount: request.loanAmount }); // Create loan object loanTerms = PWNLOANTerms.Simple({ lender: lender, borrower: borrower, expiration: uint40(block.timestamp) + request.duration, collateral: collateral, asset: loanAsset, loanRepayAmount: request.loanAmount + request.loanYield }); revokedRequestNonce.revokeNonce(borrower, request.nonce); } /*----------------------------------------------------------*| |* # GET REQUEST HASH *| |*----------------------------------------------------------*/ /** * @notice Get a request hash according to EIP-712. * @param request Request struct to be hashed. * @return Request struct hash. */ function getRequestHash(Request memory request) public view returns (bytes32) { return keccak256(abi.encodePacked( hex"1901", DOMAIN_SEPARATOR, keccak256(abi.encodePacked( REQUEST_TYPEHASH, abi.encode(request) )) )); } /*----------------------------------------------------------*| |* # LOAN TERMS FACTORY DATA ENCODING *| |*----------------------------------------------------------*/ /** * @notice Return encoded input data for this loan terms factory. * @param request Simple loan simple request struct to encode. * @return Encoded loan terms factory data that can be used as an input of `createLOANTerms` function with this factory. */ function encodeLoanTermsFactoryData(Request memory request) external pure returns (bytes memory) { return abi.encode(request); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "@openzeppelin/interfaces/IERC20.sol"; import "@openzeppelin/interfaces/IERC721.sol"; import "@openzeppelin/interfaces/IERC1155.sol"; import "@openzeppelin/token/ERC20/extensions/draft-IERC20Permit.sol"; import "@openzeppelin/token/ERC20/utils/SafeERC20.sol"; import "@openzeppelin/utils/introspection/ERC165Checker.sol"; import "@MT/interfaces/ICryptoKitties.sol"; library MultiToken { using ERC165Checker for address; using SafeERC20 for IERC20; bytes4 public constant ERC20_INTERFACE_ID = 0x36372b07; bytes4 public constant ERC721_INTERFACE_ID = 0x80ac58cd; bytes4 public constant ERC1155_INTERFACE_ID = 0xd9b67a26; bytes4 public constant CRYPTO_KITTIES_INTERFACE_ID = 0x9a20483d; /** * @title Category * @dev Enum representation Asset category. */ enum Category { ERC20, ERC721, ERC1155, CryptoKitties } /** * @title Asset * @param category Corresponding asset category. * @param assetAddress Address of the token contract defining the asset. * @param id TokenID of an NFT or 0. * @param amount Amount of fungible tokens or 0 -> 1. */ struct Asset { Category category; address assetAddress; uint256 id; uint256 amount; } /*----------------------------------------------------------*| |* # TRANSFER ASSET *| |*----------------------------------------------------------*/ /** * transferAssetFrom * @dev Wrapping function for `transferFrom` calls on various token interfaces. * If `source` is `address(this)`, function `transfer` is called instead of `transferFrom` for ERC20 category. * @param asset Struct defining all necessary context of a token. * @param source Account/address that provided the allowance. * @param dest Destination address. */ function transferAssetFrom(Asset memory asset, address source, address dest) internal { _transferAssetFrom(asset, source, dest, false); } /** * safeTransferAssetFrom * @dev Wrapping function for `safeTransferFrom` calls on various token interfaces. * If `source` is `address(this)`, function `transfer` is called instead of `transferFrom` for ERC20 category. * @param asset Struct defining all necessary context of a token. * @param source Account/address that provided the allowance. * @param dest Destination address. */ function safeTransferAssetFrom(Asset memory asset, address source, address dest) internal { _transferAssetFrom(asset, source, dest, true); } function _transferAssetFrom(Asset memory asset, address source, address dest, bool isSafe) private { if (asset.category == Category.ERC20) { if (source == address(this)) IERC20(asset.assetAddress).safeTransfer(dest, asset.amount); else IERC20(asset.assetAddress).safeTransferFrom(source, dest, asset.amount); } else if (asset.category == Category.ERC721) { if (!isSafe) IERC721(asset.assetAddress).transferFrom(source, dest, asset.id); else IERC721(asset.assetAddress).safeTransferFrom(source, dest, asset.id, ""); } else if (asset.category == Category.ERC1155) { IERC1155(asset.assetAddress).safeTransferFrom(source, dest, asset.id, asset.amount == 0 ? 1 : asset.amount, ""); } else if (asset.category == Category.CryptoKitties) { if (source == address(this)) ICryptoKitties(asset.assetAddress).transfer(dest, asset.id); else ICryptoKitties(asset.assetAddress).transferFrom(source, dest, asset.id); } else { revert("MultiToken: Unsupported category"); } } /** * getTransferAmount * @dev Get amount of asset that would be transferred. * NFTs (ERC721, CryptoKitties & ERC1155 with amount 0) with return 1. * Fungible tokens will return its amount (ERC20 with 0 amount is valid state). * In combination with `MultiToken.balanceOf`, `getTransferAmount` can be used to check successful asset transfer. * @param asset Struct defining all necessary context of a token. * @return Number of tokens that would be transferred of the asset. */ function getTransferAmount(Asset memory asset) internal pure returns (uint256) { if (asset.category == Category.ERC20) return asset.amount; else if (asset.category == Category.ERC1155 && asset.amount > 0) return asset.amount; else // Return 1 for ERC721, CryptoKitties and ERC1155 used as NFTs (amount = 0) return 1; } /*----------------------------------------------------------*| |* # TRANSFER ASSET CALLDATA *| |*----------------------------------------------------------*/ /** * transferAssetFromCalldata * @dev Wrapping function for `transferFrom` calladata on various token interfaces. * If `fromSender` is true, function `transfer` is returned instead of `transferFrom` for ERC20 category. * @param asset Struct defining all necessary context of a token. * @param source Account/address that provided the allowance. * @param dest Destination address. */ function transferAssetFromCalldata(Asset memory asset, address source, address dest, bool fromSender) pure internal returns (bytes memory) { return _transferAssetFromCalldata(asset, source, dest, fromSender, false); } /** * safeTransferAssetFromCalldata * @dev Wrapping function for `safeTransferFrom` calladata on various token interfaces. * If `fromSender` is true, function `transfer` is returned instead of `transferFrom` for ERC20 category. * @param asset Struct defining all necessary context of a token. * @param source Account/address that provided the allowance. * @param dest Destination address. */ function safeTransferAssetFromCalldata(Asset memory asset, address source, address dest, bool fromSender) pure internal returns (bytes memory) { return _transferAssetFromCalldata(asset, source, dest, fromSender, true); } function _transferAssetFromCalldata(Asset memory asset, address source, address dest, bool fromSender, bool isSafe) pure private returns (bytes memory) { if (asset.category == Category.ERC20) { if (fromSender) { return abi.encodeWithSignature( "transfer(address,uint256)", dest, asset.amount ); } else { return abi.encodeWithSignature( "transferFrom(address,address,uint256)", source, dest, asset.amount ); } } else if (asset.category == Category.ERC721) { if (!isSafe) { return abi.encodeWithSignature( "transferFrom(address,address,uint256)", source, dest, asset.id ); } else { return abi.encodeWithSignature( "safeTransferFrom(address,address,uint256,bytes)", source, dest, asset.id, "" ); } } else if (asset.category == Category.ERC1155) { return abi.encodeWithSignature( "safeTransferFrom(address,address,uint256,uint256,bytes)", source, dest, asset.id, asset.amount == 0 ? 1 : asset.amount, "" ); } else if (asset.category == Category.CryptoKitties) { if (fromSender) { return abi.encodeWithSignature( "transfer(address,uint256)", dest, asset.id ); } else { return abi.encodeWithSignature( "transferFrom(address,address,uint256)", source, dest, asset.id ); } } else { revert("MultiToken: Unsupported category"); } } /*----------------------------------------------------------*| |* # PERMIT *| |*----------------------------------------------------------*/ /** * permit * @dev Wrapping function for granting approval via permit signature. * @param asset Struct defining all necessary context of a token. * @param owner Account/address that signed the permit. * @param spender Account/address that would be granted approval to `asset`. * @param permitData Data about permit deadline (uint256) and permit signature (64/65 bytes). * Deadline and signature should be pack encoded together. * Signature can be standard (65 bytes) or compact (64 bytes) defined in EIP-2098. */ function permit(Asset memory asset, address owner, address spender, bytes memory permitData) internal { if (asset.category == Category.ERC20) { // Parse deadline and permit signature parameters uint256 deadline; bytes32 r; bytes32 s; uint8 v; // Parsing signature parameters used from OpenZeppelins ECDSA library // https://github.com/OpenZeppelin/openzeppelin-contracts/blob/83277ff916ac4f58fec072b8f28a252c1245c2f1/contracts/utils/cryptography/ECDSA.sol // Deadline (32 bytes) + standard signature data (65 bytes) -> 97 bytes if (permitData.length == 97) { assembly { deadline := mload(add(permitData, 0x20)) r := mload(add(permitData, 0x40)) s := mload(add(permitData, 0x60)) v := byte(0, mload(add(permitData, 0x80))) } } // Deadline (32 bytes) + compact signature data (64 bytes) -> 96 bytes else if (permitData.length == 96) { bytes32 vs; assembly { deadline := mload(add(permitData, 0x20)) r := mload(add(permitData, 0x40)) vs := mload(add(permitData, 0x60)) } s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); v = uint8((uint256(vs) >> 255) + 27); } else { revert("MultiToken::Permit: Invalid permit length"); } // Call permit with parsed parameters IERC20Permit(asset.assetAddress).permit(owner, spender, asset.amount, deadline, v, r, s); } else { // Currently supporting only ERC20 signed approvals via ERC2612 revert("MultiToken::Permit: Unsupported category"); } } /*----------------------------------------------------------*| |* # BALANCE OF *| |*----------------------------------------------------------*/ /** * balanceOf * @dev Wrapping function for checking balances on various token interfaces. * @param asset Struct defining all necessary context of a token. * @param target Target address to be checked. */ function balanceOf(Asset memory asset, address target) internal view returns (uint256) { if (asset.category == Category.ERC20) { return IERC20(asset.assetAddress).balanceOf(target); } else if (asset.category == Category.ERC721) { return IERC721(asset.assetAddress).ownerOf(asset.id) == target ? 1 : 0; } else if (asset.category == Category.ERC1155) { return IERC1155(asset.assetAddress).balanceOf(target, asset.id); } else if (asset.category == Category.CryptoKitties) { return ICryptoKitties(asset.assetAddress).ownerOf(asset.id) == target ? 1 : 0; } else { revert("MultiToken: Unsupported category"); } } /*----------------------------------------------------------*| |* # APPROVE ASSET *| |*----------------------------------------------------------*/ /** * approveAsset * @dev Wrapping function for `approve` calls on various token interfaces. * By using `safeApprove` for ERC20, caller can set allowance to 0 or from 0. * Cannot set non-zero value if allowance is also non-zero. * @param asset Struct defining all necessary context of a token. * @param target Account/address that would be granted approval to `asset`. */ function approveAsset(Asset memory asset, address target) internal { if (asset.category == Category.ERC20) { IERC20(asset.assetAddress).safeApprove(target, asset.amount); } else if (asset.category == Category.ERC721) { IERC721(asset.assetAddress).approve(target, asset.id); } else if (asset.category == Category.ERC1155) { IERC1155(asset.assetAddress).setApprovalForAll(target, true); } else if (asset.category == Category.CryptoKitties) { ICryptoKitties(asset.assetAddress).approve(target, asset.id); } else { revert("MultiToken: Unsupported category"); } } /*----------------------------------------------------------*| |* # ASSET CHECKS *| |*----------------------------------------------------------*/ /** * isValid * @dev Checks that provided asset is contract, has correct format and stated category. * Fungible tokens (ERC20) have to have id = 0. * NFT (ERC721, CryptoKitties) tokens have to have amount = 0. * Correct asset category is determined via ERC165. * The check assumes, that asset contract implements only one token standard at a time. * @param asset Asset that is examined. * @return True if assets amount and id is valid in stated category. */ function isValid(Asset memory asset) internal view returns (bool) { if (asset.category == Category.ERC20) { // Check format if (asset.id != 0) return false; // ERC20 has optional ERC165 implementation if (asset.assetAddress.supportsERC165()) { // If ERC20 implements ERC165, it has to return true for its interface id return asset.assetAddress.supportsERC165InterfaceUnchecked(ERC20_INTERFACE_ID); } else { // In case token doesn't implement ERC165, its safe to assume that provided category is correct, // because any other category have to implement ERC165. // Check that asset address is contract // Tip: asset address will return code length 0, if this code is called from the asset constructor return asset.assetAddress.code.length > 0; } } else if (asset.category == Category.ERC721) { // Check format if (asset.amount != 0) return false; // Check it's ERC721 via ERC165 return asset.assetAddress.supportsInterface(ERC721_INTERFACE_ID); } else if (asset.category == Category.ERC1155) { // Check it's ERC1155 via ERC165 return asset.assetAddress.supportsInterface(ERC1155_INTERFACE_ID); } else if (asset.category == Category.CryptoKitties) { // Check format if (asset.amount != 0) return false; // Check it's CryptoKitties via ERC165 return asset.assetAddress.supportsInterface(CRYPTO_KITTIES_INTERFACE_ID); } else { revert("MultiToken: Unsupported category"); } } /** * isSameAs * @dev Compare two assets, ignoring their amounts. * @param asset First asset to examine. * @param otherAsset Second asset to examine. * @return True if both structs represents the same asset. */ function isSameAs(Asset memory asset, Asset memory otherAsset) internal pure returns (bool) { return asset.category == otherAsset.category && asset.assetAddress == otherAsset.assetAddress && asset.id == otherAsset.id; } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "openzeppelin-contracts/contracts/utils/cryptography/ECDSA.sol"; import "openzeppelin-contracts/contracts/interfaces/IERC1271.sol"; import "@pwn/PWNErrors.sol"; /** * @title PWN Signature Checker * @notice Library to check if a given signature is valid for EOAs or contract accounts. * @dev This library is a modification of an Open-Zeppelin `SignatureChecker` library extended by a support for EIP-2098 compact signatures. */ library PWNSignatureChecker { string internal constant VERSION = "1.0"; /** * @dev Function will try to recover a signer of a given signature and check if is the same as given signer address. * For a contract account signer address, function will check signature validity by calling `isValidSignature` function defined by EIP-1271. * @param signer Address that should be a `hash` signer or a signature validator, in case of a contract account. * @param hash Hash of a signed message that should validated. * @param signature Signature of a signed `hash`. Could be empty for a contract account signature validation. * Signature can be standard (65 bytes) or compact (64 bytes) defined by EIP-2098. * @return True if a signature is valid. */ function isValidSignatureNow( address signer, bytes32 hash, bytes memory signature ) internal view returns (bool) { // Check that signature is valid for contract account if (signer.code.length > 0) { (bool success, bytes memory result) = signer.staticcall( abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature) ); return success && result.length == 32 && abi.decode(result, (bytes32)) == bytes32(IERC1271.isValidSignature.selector); } // Check that signature is valid for EOA else { bytes32 r; bytes32 s; uint8 v; // Standard signature data (65 bytes) if (signature.length == 65) { assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } } // Compact signature data (64 bytes) - see EIP-2098 else if (signature.length == 64) { bytes32 vs; assembly { r := mload(add(signature, 0x20)) vs := mload(add(signature, 0x40)) } s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); v = uint8((uint256(vs) >> 255) + 27); } else { revert InvalidSignatureLength(signature.length); } return signer == ECDSA.recover(hash, v, r, s); } } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "@pwn/hub/PWNHubAccessControl.sol"; import "@pwn/loan/terms/simple/factory/PWNSimpleLoanTermsFactory.sol"; import "@pwn/nonce/PWNRevokedNonce.sol"; import "@pwn/PWNErrors.sol"; abstract contract PWNSimpleLoanRequest is PWNSimpleLoanTermsFactory, PWNHubAccessControl { /*----------------------------------------------------------*| |* # VARIABLES & CONSTANTS DEFINITIONS *| |*----------------------------------------------------------*/ PWNRevokedNonce internal immutable revokedRequestNonce; /** * @dev Mapping of requests made via on-chain transactions. * Could be used by contract wallets instead of EIP-1271. * (request hash => is made) */ mapping (bytes32 => bool) public requestsMade; /*----------------------------------------------------------*| |* # EVENTS & ERRORS DEFINITIONS *| |*----------------------------------------------------------*/ /** * @dev Emitted when a request is made via an on-chain transaction. */ event RequestMade(bytes32 indexed requestHash, address indexed borrower); /*----------------------------------------------------------*| |* # CONSTRUCTOR *| |*----------------------------------------------------------*/ constructor(address hub, address _revokedRequestNonce) PWNHubAccessControl(hub) { revokedRequestNonce = PWNRevokedNonce(_revokedRequestNonce); } /*----------------------------------------------------------*| |* # REQUEST MANAGEMENT *| |*----------------------------------------------------------*/ /** * @notice Make an on-chain request. * @dev Function will mark a request hash as proposed. Request will become acceptable by a borrower without a request signature. * @param requestStructHash Hash of a proposed request. * @param borrower Address of a request proposer (borrower). */ function _makeRequest(bytes32 requestStructHash, address borrower) internal { // Check that caller is a borrower if (msg.sender != borrower) revert CallerIsNotStatedBorrower(borrower); // Mark request as made requestsMade[requestStructHash] = true; emit RequestMade(requestStructHash, borrower); } /** * @notice Helper function for revoking a request nonce on behalf of a caller. * @param requestNonce Request nonce to be revoked. */ function revokeRequestNonce(uint256 requestNonce) external { revokedRequestNonce.revokeNonce(msg.sender, requestNonce); } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "MultiToken/MultiToken.sol"; library PWNLOANTerms { /** * @notice Struct defining a simple loan terms. * @dev This struct is created by loan factories and never stored. * @param lender Address of a lender. * @param borrower Address of a borrower. * @param expiration Unix timestamp (in seconds) setting up a default date. * @param collateral Asset used as a loan collateral. For a definition see { MultiToken dependency lib }. * @param asset Asset used as a loan credit. For a definition see { MultiToken dependency lib }. * @param loanRepayAmount Amount of a loan asset to be paid back. */ struct Simple { address lender; address borrower; uint40 expiration; MultiToken.Asset collateral; MultiToken.Asset asset; uint256 loanRepayAmount; } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; // Access control error CallerMissingHubTag(bytes32); // Loan contract error LoanDefaulted(uint40); error InvalidLoanStatus(uint256); error NonExistingLoan(); error CallerNotLOANTokenHolder(); error InvalidExtendedExpirationDate(); // Invalid asset error InvalidLoanAsset(); error InvalidCollateralAsset(); // LOAN token error InvalidLoanContractCaller(); // Vault error UnsupportedTransferFunction(); error IncompleteTransfer(); // Nonce error NonceAlreadyRevoked(); error InvalidMinNonce(); // Signature checks error InvalidSignatureLength(uint256); error InvalidSignature(); // Offer error CallerIsNotStatedBorrower(address); error OfferExpired(); error CollateralIdIsNotWhitelisted(); // Request error CallerIsNotStatedLender(address); error RequestExpired(); // Request & Offer error InvalidDuration(); // Input data error InvalidInputData(); // Config error InvalidFeeValue(); error InvalidFeeCollector();
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC20.sol) pragma solidity ^0.8.0; import "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC721.sol) pragma solidity ^0.8.0; import "../token/ERC721/IERC721.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC1155.sol) pragma solidity ^0.8.0; import "../token/ERC1155/IERC1155.sol";
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20Permit { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20.sol"; import "../extensions/draft-IERC20Permit.sol"; import "../../../utils/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)); } } function safePermit( IERC20Permit token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20 token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); if (returndata.length > 0) { // Return data is optional require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/introspection/ERC165Checker.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Library used to query support of an interface declared via {IERC165}. * * Note that these functions return the actual result of the query: they do not * `revert` if an interface is not supported. It is up to the caller to decide * what to do in these cases. */ library ERC165Checker { // As per the EIP-165 spec, no interface should ever match 0xffffffff bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff; /** * @dev Returns true if `account` supports the {IERC165} interface. */ function supportsERC165(address account) internal view returns (bool) { // Any contract that implements ERC165 must explicitly indicate support of // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid return supportsERC165InterfaceUnchecked(account, type(IERC165).interfaceId) && !supportsERC165InterfaceUnchecked(account, _INTERFACE_ID_INVALID); } /** * @dev Returns true if `account` supports the interface defined by * `interfaceId`. Support for {IERC165} itself is queried automatically. * * See {IERC165-supportsInterface}. */ function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) { // query support of both ERC165 as per the spec and support of _interfaceId return supportsERC165(account) && supportsERC165InterfaceUnchecked(account, interfaceId); } /** * @dev Returns a boolean array where each value corresponds to the * interfaces passed in and whether they're supported or not. This allows * you to batch check interfaces for a contract where your expectation * is that some interfaces may not be supported. * * See {IERC165-supportsInterface}. * * _Available since v3.4._ */ function getSupportedInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool[] memory) { // an array of booleans corresponding to interfaceIds and whether they're supported or not bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length); // query support of ERC165 itself if (supportsERC165(account)) { // query support of each interface in interfaceIds for (uint256 i = 0; i < interfaceIds.length; i++) { interfaceIdsSupported[i] = supportsERC165InterfaceUnchecked(account, interfaceIds[i]); } } return interfaceIdsSupported; } /** * @dev Returns true if `account` supports all the interfaces defined in * `interfaceIds`. Support for {IERC165} itself is queried automatically. * * Batch-querying can lead to gas savings by skipping repeated checks for * {IERC165} support. * * See {IERC165-supportsInterface}. */ function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) { // query support of ERC165 itself if (!supportsERC165(account)) { return false; } // query support of each interface in interfaceIds for (uint256 i = 0; i < interfaceIds.length; i++) { if (!supportsERC165InterfaceUnchecked(account, interfaceIds[i])) { return false; } } // all interfaces supported return true; } /** * @notice Query if a contract implements an interface, does not check ERC165 support * @param account The address of the contract to query for support of an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @return true if the contract at account indicates support of the interface with * identifier interfaceId, false otherwise * @dev Assumes that account contains a contract that supports ERC165, otherwise * the behavior of this method is undefined. This precondition can be checked * with {supportsERC165}. * Interface identification is specified in ERC-165. */ function supportsERC165InterfaceUnchecked(address account, bytes4 interfaceId) internal view returns (bool) { // prepare call bytes memory encodedParams = abi.encodeWithSelector(IERC165.supportsInterface.selector, interfaceId); // perform static call bool success; uint256 returnSize; uint256 returnValue; assembly { success := staticcall(30000, account, add(encodedParams, 0x20), mload(encodedParams), 0x00, 0x20) returnSize := returndatasize() returnValue := mload(0x00) } return success && returnSize >= 0x20 && returnValue > 0; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface ICryptoKitties { // Required methods function totalSupply() external view returns (uint256 total); function balanceOf(address _owner) external view returns (uint256 balance); function ownerOf(uint256 _tokenId) external view returns (address owner); function approve(address _to, uint256 _tokenId) external; function transfer(address _to, uint256 _tokenId) external; function transferFrom(address _from, address _to, uint256 _tokenId) external; // Optional function name() external view returns (string memory name); function symbol() external view returns (string memory symbol); function tokensOfOwner(address _owner) external view returns (uint256[] memory tokenIds); function tokenMetadata(uint256 _tokenId, string memory _preferredTransport) external view returns (string memory infoUrl); // Events event Transfer(address from, address to, uint256 tokenId); event Approval(address owner, address approved, uint256 tokenId); // ERC-165 Compatibility (https://github.com/ethereum/EIPs/issues/165) // Is not part of the interface id function supportsInterface(bytes4 _interfaceID) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/cryptography/ECDSA.sol) pragma solidity ^0.8.0; import "../Strings.sol"; /** * @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations. * * These functions can be used to verify that a message was signed by the holder * of the private keys of a given address. */ library ECDSA { enum RecoverError { NoError, InvalidSignature, InvalidSignatureLength, InvalidSignatureS, InvalidSignatureV // Deprecated in v4.8 } function _throwError(RecoverError error) private pure { if (error == RecoverError.NoError) { return; // no error: do nothing } else if (error == RecoverError.InvalidSignature) { revert("ECDSA: invalid signature"); } else if (error == RecoverError.InvalidSignatureLength) { revert("ECDSA: invalid signature length"); } else if (error == RecoverError.InvalidSignatureS) { revert("ECDSA: invalid signature 's' value"); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature` or error string. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. * * Documentation for signature generation: * - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] * - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] * * _Available since v4.3._ */ function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError) { if (signature.length == 65) { bytes32 r; bytes32 s; uint8 v; // ecrecover takes the signature parameters, and the only way to get them // currently is to use assembly. /// @solidity memory-safe-assembly assembly { r := mload(add(signature, 0x20)) s := mload(add(signature, 0x40)) v := byte(0, mload(add(signature, 0x60))) } return tryRecover(hash, v, r, s); } else { return (address(0), RecoverError.InvalidSignatureLength); } } /** * @dev Returns the address that signed a hashed message (`hash`) with * `signature`. This address can then be used for verification purposes. * * The `ecrecover` EVM opcode allows for malleable (non-unique) signatures: * this function rejects them by requiring the `s` value to be in the lower * half order, and the `v` value to be either 27 or 28. * * IMPORTANT: `hash` _must_ be the result of a hash operation for the * verification to be secure: it is possible to craft signatures that * recover to arbitrary addresses for non-hashed data. A safe way to ensure * this is by receiving a hash of the original message (which may otherwise * be too long), and then calling {toEthSignedMessageHash} on it. */ function recover(bytes32 hash, bytes memory signature) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, signature); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. * * See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures] * * _Available since v4.3._ */ function tryRecover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address, RecoverError) { bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff); uint8 v = uint8((uint256(vs) >> 255) + 27); return tryRecover(hash, v, r, s); } /** * @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. * * _Available since v4.2._ */ function recover( bytes32 hash, bytes32 r, bytes32 vs ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, r, vs); _throwError(error); return recovered; } /** * @dev Overload of {ECDSA-tryRecover} that receives the `v`, * `r` and `s` signature fields separately. * * _Available since v4.3._ */ function tryRecover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address, RecoverError) { // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most // signatures from current libraries generate a unique signature with an s-value in the lower half order. // // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept // these malleable signatures as well. if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) { return (address(0), RecoverError.InvalidSignatureS); } // If the signature is valid (and not malleable), return the signer address address signer = ecrecover(hash, v, r, s); if (signer == address(0)) { return (address(0), RecoverError.InvalidSignature); } return (signer, RecoverError.NoError); } /** * @dev Overload of {ECDSA-recover} that receives the `v`, * `r` and `s` signature fields separately. */ function recover( bytes32 hash, uint8 v, bytes32 r, bytes32 s ) internal pure returns (address) { (address recovered, RecoverError error) = tryRecover(hash, v, r, s); _throwError(error); return recovered; } /** * @dev Returns an Ethereum Signed Message, created from a `hash`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32) { // 32 is the length in bytes of hash, // enforced by the type signature above return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash)); } /** * @dev Returns an Ethereum Signed Message, created from `s`. This * produces hash corresponding to the one signed with the * https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] * JSON-RPC method as part of EIP-191. * * See {recover}. */ function toEthSignedMessageHash(bytes memory s) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n", Strings.toString(s.length), s)); } /** * @dev Returns an Ethereum Signed Typed Data, created from a * `domainSeparator` and a `structHash`. This produces hash corresponding * to the one signed with the * https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] * JSON-RPC method as part of EIP-712. * * See {recover}. */ function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32) { return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (interfaces/IERC1271.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC1271 standard signature validation method for * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271]. * * _Available since v4.1._ */ interface IERC1271 { /** * @dev Should return whether the signature provided is valid for the provided data * @param hash Hash of the data to be signed * @param signature Signature byte array associated with _data */ function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue); }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "@pwn/hub/PWNHub.sol"; import "@pwn/hub/PWNHubTags.sol"; import "@pwn/PWNErrors.sol"; /** * @title PWN Hub Access Control * @notice Implement modifiers for PWN Hub access control. */ abstract contract PWNHubAccessControl { /*----------------------------------------------------------*| |* # VARIABLES & CONSTANTS DEFINITIONS *| |*----------------------------------------------------------*/ PWNHub immutable internal hub; /*----------------------------------------------------------*| |* # MODIFIERS *| |*----------------------------------------------------------*/ modifier onlyActiveLoan() { if (hub.hasTag(msg.sender, PWNHubTags.ACTIVE_LOAN) == false) revert CallerMissingHubTag(PWNHubTags.ACTIVE_LOAN); _; } modifier onlyWithTag(bytes32 tag) { if (hub.hasTag(msg.sender, tag) == false) revert CallerMissingHubTag(tag); _; } /*----------------------------------------------------------*| |* # CONSTRUCTOR *| |*----------------------------------------------------------*/ constructor(address pwnHub) { hub = PWNHub(pwnHub); } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "@pwn/loan/terms/PWNLOANTerms.sol"; /** * @title PWN Simple Loan Terms Factory Interface * @notice Interface of a loan factory contract that builds a simple loan terms. */ abstract contract PWNSimpleLoanTermsFactory { uint32 public constant MIN_LOAN_DURATION = 600; // 10 min /** * @notice Build a simple loan terms from given data. * @dev This function should be called only by contracts working with simple loan terms. * @param caller Caller of a create loan function on a loan contract. * @param factoryData Encoded data for a loan terms factory. * @param signature Signed loan factory data. * @return loanTerms Simple loan terms struct created from a loan factory data. * @return factoryDataHash Hash of a loan offer / request that is signed by a lender / borrower. Used to uniquely identify a loan offer / request. */ function createLOANTerms( address caller, bytes calldata factoryData, bytes calldata signature ) external virtual returns (PWNLOANTerms.Simple memory loanTerms, bytes32 factoryDataHash); }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "@pwn/hub/PWNHubAccessControl.sol"; import "@pwn/PWNErrors.sol"; /** * @title PWN Revoked Nonce * @notice Contract holding revoked nonces. */ contract PWNRevokedNonce is PWNHubAccessControl { /*----------------------------------------------------------*| |* # VARIABLES & CONSTANTS DEFINITIONS *| |*----------------------------------------------------------*/ bytes32 immutable internal accessTag; /** * @dev Mapping of revoked nonces by an address. * Every address has its own nonce space. * (owner => nonce => is revoked) */ mapping (address => mapping (uint256 => bool)) private revokedNonces; /** * @dev Mapping of minimal nonce value per address. * (owner => minimal nonce value) */ mapping (address => uint256) private minNonces; /*----------------------------------------------------------*| |* # EVENTS DEFINITIONS *| |*----------------------------------------------------------*/ /** * @dev Emitted when a nonce is revoked. */ event NonceRevoked(address indexed owner, uint256 indexed nonce); /** * @dev Emitted when a new min nonce value is set. */ event MinNonceSet(address indexed owner, uint256 indexed minNonce); /*----------------------------------------------------------*| |* # CONSTRUCTOR *| |*----------------------------------------------------------*/ constructor(address hub, bytes32 _accessTag) PWNHubAccessControl(hub) { accessTag = _accessTag; } /*----------------------------------------------------------*| |* # REVOKE NONCE *| |*----------------------------------------------------------*/ /** * @notice Revoke a nonce. * @dev Caller is used as a nonce owner. * @param nonce Nonce to be revoked. */ function revokeNonce(uint256 nonce) external { _revokeNonce(msg.sender, nonce); } /** * @notice Revoke a nonce on behalf of an owner. * @dev Only an address with associated access tag in PWN Hub can call this function. * @param owner Owner address of a revoking nonce. * @param nonce Nonce to be revoked. */ function revokeNonce(address owner, uint256 nonce) external onlyWithTag(accessTag) { _revokeNonce(owner, nonce); } function _revokeNonce(address owner, uint256 nonce) private { // Revoke nonce revokedNonces[owner][nonce] = true; // Emit event emit NonceRevoked(owner, nonce); } /*----------------------------------------------------------*| |* # SET MIN NONCE *| |*----------------------------------------------------------*/ /** * @notice Set a minimal nonce. * @dev Nonce is considered revoked when smaller than minimal nonce. * @param minNonce New value of a minimal nonce. */ function setMinNonce(uint256 minNonce) external { // Check that nonce is greater than current min nonce uint256 currentMinNonce = minNonces[msg.sender]; if (currentMinNonce >= minNonce) revert InvalidMinNonce(); // Set new min nonce value minNonces[msg.sender] = minNonce; // Emit event emit MinNonceSet(msg.sender, minNonce); } /*----------------------------------------------------------*| |* # IS NONCE REVOKED *| |*----------------------------------------------------------*/ /** * @notice Get information if owners nonce is revoked or not. * @dev Nonce is considered revoked if is smaller than owners min nonce value or if is explicitly revoked. * @param owner Address of a nonce owner. * @param nonce Nonce in question. * @return True if owners nonce is revoked. */ function isNonceRevoked(address owner, uint256 nonce) external view returns (bool) { if (nonce < minNonces[owner]) return true; return revokedNonces[owner][nonce]; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20 { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 amount ) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721 * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must * understand this adds an external call which potentially creates a reentrancy vulnerability. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch( address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values ); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes calldata data ) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom( address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data ) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (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 functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/Math.sol"; /** * @dev String operations. */ library Strings { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = Math.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, Math.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; import "openzeppelin-contracts/contracts/access/Ownable2Step.sol"; import "@pwn/PWNErrors.sol"; /** * @title PWN Hub * @notice Connects PWN contracts together into protocol via tags. */ contract PWNHub is Ownable2Step { /*----------------------------------------------------------*| |* # VARIABLES & CONSTANTS DEFINITIONS *| |*----------------------------------------------------------*/ /** * @dev Mapping of address tags. (contract address => tag => is tagged) */ mapping (address => mapping (bytes32 => bool)) private tags; /*----------------------------------------------------------*| |* # EVENTS & ERRORS DEFINITIONS *| |*----------------------------------------------------------*/ /** * @dev Emitted when tag is set for an address. */ event TagSet(address indexed _address, bytes32 indexed tag, bool hasTag); /*----------------------------------------------------------*| |* # CONSTRUCTOR *| |*----------------------------------------------------------*/ constructor() Ownable2Step() { } /*----------------------------------------------------------*| |* # TAG MANAGEMENT *| |*----------------------------------------------------------*/ /** * @notice Set tag to an address. * @dev Tag can be added or removed via this functions. Only callable by contract owner. * @param _address Address to which a tag is set. * @param tag Tag that is set to an `_address`. * @param _hasTag Bool value if tag is added or removed. */ function setTag(address _address, bytes32 tag, bool _hasTag) public onlyOwner { tags[_address][tag] = _hasTag; emit TagSet(_address, tag, _hasTag); } /** * @notice Set list of tags to an address. * @dev Tags can be added or removed via this functions. Only callable by contract owner. * @param _addresses List of addresses to which tags are set. * @param _tags List of tags that are set to an `_address`. * @param _hasTag Bool value if tags are added or removed. */ function setTags(address[] memory _addresses, bytes32[] memory _tags, bool _hasTag) external onlyOwner { if (_addresses.length != _tags.length) revert InvalidInputData(); uint256 length = _tags.length; for (uint256 i; i < length;) { setTag(_addresses[i], _tags[i], _hasTag); unchecked { ++i; } } } /*----------------------------------------------------------*| |* # TAG GETTER *| |*----------------------------------------------------------*/ /** * @dev Return if an address is associated with a tag. * @param _address Address that is examined for a `tag`. * @param tag Tag that should an `_address` be associated with. * @return True if given address has a tag. */ function hasTag(address _address, bytes32 tag) external view returns (bool) { return tags[_address][tag]; } }
// SPDX-License-Identifier: GPL-3.0-only pragma solidity 0.8.16; library PWNHubTags { string internal constant VERSION = "1.0"; /// @dev Address can mint LOAN tokens and create LOANs via loan factory contracts. bytes32 internal constant ACTIVE_LOAN = keccak256("PWN_ACTIVE_LOAN"); /// @dev Address can be used as a loan terms factory for creating simple loans. bytes32 internal constant SIMPLE_LOAN_TERMS_FACTORY = keccak256("PWN_SIMPLE_LOAN_TERMS_FACTORY"); /// @dev Address can revoke loan request nonces. bytes32 internal constant LOAN_REQUEST = keccak256("PWN_LOAN_REQUEST"); /// @dev Address can revoke loan offer nonces. bytes32 internal constant LOAN_OFFER = keccak256("PWN_LOAN_OFFER"); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library Math { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv( uint256 x, uint256 y, uint256 denominator ) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv( uint256 x, uint256 y, uint256 denominator, Rounding rounding ) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10**64) { value /= 10**64; result += 64; } if (value >= 10**32) { value /= 10**32; result += 32; } if (value >= 10**16) { value /= 10**16; result += 16; } if (value >= 10**8) { value /= 10**8; result += 8; } if (value >= 10**4) { value /= 10**4; result += 4; } if (value >= 10**2) { value /= 10**2; result += 2; } if (value >= 10**1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10**result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result * 8) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol) pragma solidity ^0.8.0; import "./Ownable.sol"; /** * @dev Contract module which provides access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership} and {acceptOwnership}. * * This module is used through inheritance. It will make available all functions * from parent (Ownable). */ abstract contract Ownable2Step is Ownable { address private _pendingOwner; event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner); /** * @dev Returns the address of the pending owner. */ function pendingOwner() public view virtual returns (address) { return _pendingOwner; } /** * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one. * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual override onlyOwner { _pendingOwner = newOwner; emit OwnershipTransferStarted(owner(), newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner. * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual override { delete _pendingOwner; super._transferOwnership(newOwner); } /** * @dev The new owner accepts the ownership transfer. */ function acceptOwnership() external { address sender = _msgSender(); require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner"); _transferOwnership(sender); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { _checkOwner(); _; } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if the sender is not the owner. */ function _checkOwner() internal view virtual { require(owner() == _msgSender(), "Ownable: caller is not the owner"); } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
{ "remappings": [ "@MT/=lib/MultiToken/src/", "@openzeppelin/=lib/openzeppelin-contracts/contracts/", "@pwn-test/=test/", "@pwn/=src/", "MultiToken/=lib/MultiToken/src/", "ds-test/=lib/forge-std/lib/ds-test/src/", "forge-std/=lib/forge-std/src/", "openzeppelin-contracts/=lib/openzeppelin-contracts/" ], "optimizer": { "enabled": true, "runs": 200 }, "metadata": { "bytecodeHash": "ipfs" }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "evmVersion": "london", "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"address","name":"hub","type":"address"},{"internalType":"address","name":"revokedRequestNonce","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"CallerIsNotStatedBorrower","type":"error"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"CallerIsNotStatedLender","type":"error"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"CallerMissingHubTag","type":"error"},{"inputs":[],"name":"InvalidDuration","type":"error"},{"inputs":[],"name":"InvalidSignature","type":"error"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"InvalidSignatureLength","type":"error"},{"inputs":[],"name":"NonceAlreadyRevoked","type":"error"},{"inputs":[],"name":"RequestExpired","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"requestHash","type":"bytes32"},{"indexed":true,"internalType":"address","name":"borrower","type":"address"}],"name":"RequestMade","type":"event"},{"inputs":[],"name":"MIN_LOAN_DURATION","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"caller","type":"address"},{"internalType":"bytes","name":"factoryData","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"createLOANTerms","outputs":[{"components":[{"internalType":"address","name":"lender","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint40","name":"expiration","type":"uint40"},{"components":[{"internalType":"enum MultiToken.Category","name":"category","type":"uint8"},{"internalType":"address","name":"assetAddress","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"internalType":"struct MultiToken.Asset","name":"collateral","type":"tuple"},{"components":[{"internalType":"enum MultiToken.Category","name":"category","type":"uint8"},{"internalType":"address","name":"assetAddress","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"}],"internalType":"struct MultiToken.Asset","name":"asset","type":"tuple"},{"internalType":"uint256","name":"loanRepayAmount","type":"uint256"}],"internalType":"struct PWNLOANTerms.Simple","name":"loanTerms","type":"tuple"},{"internalType":"bytes32","name":"requestHash","type":"bytes32"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"enum MultiToken.Category","name":"collateralCategory","type":"uint8"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"uint256","name":"collateralAmount","type":"uint256"},{"internalType":"address","name":"loanAssetAddress","type":"address"},{"internalType":"uint256","name":"loanAmount","type":"uint256"},{"internalType":"uint256","name":"loanYield","type":"uint256"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"uint40","name":"expiration","type":"uint40"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"address","name":"lender","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"internalType":"struct PWNSimpleLoanSimpleRequest.Request","name":"request","type":"tuple"}],"name":"encodeLoanTermsFactoryData","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"pure","type":"function"},{"inputs":[{"components":[{"internalType":"enum MultiToken.Category","name":"collateralCategory","type":"uint8"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"uint256","name":"collateralAmount","type":"uint256"},{"internalType":"address","name":"loanAssetAddress","type":"address"},{"internalType":"uint256","name":"loanAmount","type":"uint256"},{"internalType":"uint256","name":"loanYield","type":"uint256"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"uint40","name":"expiration","type":"uint40"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"address","name":"lender","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"internalType":"struct PWNSimpleLoanSimpleRequest.Request","name":"request","type":"tuple"}],"name":"getRequestHash","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"enum MultiToken.Category","name":"collateralCategory","type":"uint8"},{"internalType":"address","name":"collateralAddress","type":"address"},{"internalType":"uint256","name":"collateralId","type":"uint256"},{"internalType":"uint256","name":"collateralAmount","type":"uint256"},{"internalType":"address","name":"loanAssetAddress","type":"address"},{"internalType":"uint256","name":"loanAmount","type":"uint256"},{"internalType":"uint256","name":"loanYield","type":"uint256"},{"internalType":"uint32","name":"duration","type":"uint32"},{"internalType":"uint40","name":"expiration","type":"uint40"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"address","name":"lender","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"internalType":"struct PWNSimpleLoanSimpleRequest.Request","name":"request","type":"tuple"}],"name":"makeRequest","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"requestsMade","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"requestNonce","type":"uint256"}],"name":"revokeRequestNonce","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000037807a2f031b3b44081f4b21500e5d70ebadadd5000000000000000000000000472361e75d28597b0a7f86146fbb4a86f173d10d
-----Decoded View---------------
Arg [0] : hub (address): 0x37807A2F031b3B44081F4b21500E5D70EbaDAdd5
Arg [1] : revokedRequestNonce (address): 0x472361E75d28597b0a7F86146fbB4a86f173d10D
-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000037807a2f031b3b44081f4b21500e5d70ebadadd5
Arg [1] : 000000000000000000000000472361e75d28597b0a7f86146fbb4a86f173d10d
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Multichain Portfolio | 26 Chains
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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.