ERC-20
Overview
Max Total Supply
21,544.346900318660796 FPS
Holders
1
Market
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
21,544.346900318660796 FPSValue
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
Equity
Compiler Version
v0.8.19+commit.7dd6d404
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./ERC20PermitLight.sol"; import "./Equity.sol"; import "./IReserve.sol"; import "./IFrankencoin.sol"; contract Frankencoin is ERC20PermitLight, IFrankencoin { uint256 public constant MIN_FEE = 1000 * (10**18); uint256 public immutable MIN_APPLICATION_PERIOD; // for example 10 days IReserve override public immutable reserve; uint256 private minterReserveE6; mapping (address => uint256) public minters; mapping (address => address) public positions; event MinterApplied(address indexed minter, uint256 applicationPeriod, uint256 applicationFee, string message); event MinterDenied(address indexed minter, string message); /** * Initiates the Frankencoin with the provided minimum application period for new plugins * in seconds, for example 10 days, i.e. 3600*24*10 = 864000 */ constructor(uint256 _minApplicationPeriod) ERC20(18){ MIN_APPLICATION_PERIOD = _minApplicationPeriod; reserve = new Equity(this); } function name() override external pure returns (string memory){ return "Frankencoin V1"; } function symbol() override external pure returns (string memory){ return "ZCHF"; } /** * @notice Minting is suggested either by (1) person applying for a new original position, * or (2) by the minting hub when cloning a position. The minting hub has the priviledge * to call with zero application fee and period. * @param _minter address of the position want to add to the minters * @param _applicationPeriod application period in seconds * @param _applicationFee application fee in parts per million * @param _message message string */ function suggestMinter(address _minter, uint256 _applicationPeriod, uint256 _applicationFee, string calldata _message) override external { require(_applicationPeriod >= MIN_APPLICATION_PERIOD || totalSupply() == 0, "period too short"); require(_applicationFee >= MIN_FEE || totalSupply() == 0, "fee too low"); require(minters[_minter] == 0, "already registered"); _transfer(msg.sender, address(reserve), _applicationFee); minters[_minter] = block.timestamp + _applicationPeriod; emit MinterApplied(_minter, _applicationPeriod, _applicationFee, _message); } function minterReserve() public view returns (uint256) { return minterReserveE6 / 1000000; } function registerPosition(address _position) override external { require(isMinter(msg.sender), "not minter"); positions[_position] = msg.sender; } /** * @notice Get reserve balance (amount of ZCHF) * @return ZCHF in dec18 format */ function equity() public view returns (uint256) { uint256 balance = balanceOf(address(reserve)); uint256 minReserve = minterReserve(); if (balance <= minReserve){ return 0; } else { return balance - minReserve; } } function denyMinter(address _minter, address[] calldata _helpers, string calldata _message) override external { require(block.timestamp <= minters[_minter], "too late"); require(reserve.isQualified(msg.sender, _helpers), "not qualified"); delete minters[_minter]; emit MinterDenied(_minter, _message); } /** * @notice Mint amount of ZCHF for address _target * @param _target address that receives ZCHF if it's a minter * @param _amount amount ZCHF before fees and pool contribution requested * number in dec18 format * @param _reservePPM reserve requirement in parts per million * @param _feesPPM fees in parts per million */ function mint(address _target, uint256 _amount, uint32 _reservePPM, uint32 _feesPPM) override external minterOnly { uint256 _minterReserveE6 = _amount * _reservePPM; uint256 reserveMint = (_minterReserveE6 + 999_999) / 1000_000; // make sure rounded up uint256 fees = (_amount * _feesPPM + 999_999) / 1000_000; // make sure rounded up _mint(_target, _amount - reserveMint - fees); _mint(address(reserve), reserveMint + fees); minterReserveE6 += reserveMint * 1000_000; } /** * @notice Mint amount of ZCHF for address _target * @param _target address that receives ZCHF if it's a minter * @param _amount amount in dec18 format */ function mint(address _target, uint256 _amount) override external minterOnly { _mint(_target, _amount); } function burn(uint256 _amount) external { _burn(msg.sender, _amount); } /** * Burn that amount without reclaiming the reserve. * The caller is only allowed to use this method for tokens also minted through the caller with the same _reservePPM amount. * For example, if someone minted 50 ZCHF earlier with a 20% reserve requirement (200000 ppm), they got 40 ZCHF and paid * 10 ZCHF into the reserve. Now they want to repay the debt by burning 50 ZCHF. When doing so using this method, the 10 ZCHF * that went into the reserve are not returned. Instead, they are donated to the reserve pool, making the pool share holders * richer. This can make sense in combination with 'notifyLoss', i.e. when it is the pool share holders that bear the risk * and depending on the outcome they make a profit or a loss. */ function burn(uint256 amount, uint32 reservePPM) external override minterOnly { _burn(msg.sender, amount); minterReserveE6 -= amount * reservePPM; } function calculateAssignedReserve(uint256 mintedAmount, uint32 _reservePPM) public view returns (uint256) { uint256 theoreticalReserve = _reservePPM * mintedAmount / 1000000; uint256 currentReserve = balanceOf(address(reserve)); if (currentReserve < minterReserve()){ // not enough reserves, owner has to take a loss return theoreticalReserve * currentReserve / minterReserve(); } else { return theoreticalReserve; } } /** * Burns the target amount taking the tokens to be burned from the payer and the payer's reserve. * The caller is only allowed to use this method for tokens also minted through the caller with the same _reservePPM amount. * Example: the calling contract has previously minted 100 ZCHF with a reserve ratio of 20% (i.e. 200000 ppm). To burn half * of that again, the minter calls burnFrom with a target amount of 50 ZCHF. Assuming that reserves are only 90% covered, * this call will deduct 41 ZCHF from the payer's balance and 9 from the reserve, while reducing the minter reserve by 10. */ function burnFrom(address payer, uint256 targetTotalBurnAmount, uint32 _reservePPM) external override minterOnly returns (uint256) { uint256 assigned = calculateAssignedReserve(targetTotalBurnAmount, _reservePPM); _transfer(address(reserve), payer, assigned); _burn(payer, targetTotalBurnAmount); // and burn everything minterReserveE6 -= targetTotalBurnAmount * _reservePPM; // reduce reserve requirements by original ratio return assigned; } /** * Burns the provided number of tokens plus whatever reserves are associated with that amount given the reserve requirement. * The caller is only allowed to use this method for tokens also minted through the caller with the same _reservePPM amount. * Example: the calling contract has previously minted 100 ZCHF with a reserve ratio of 20% (i.e. 200000 ppm). Now they have * 41 ZCHF that they do not need so they decide to repay that amount. Assuming the reserves are only 90% covered, * the call to burnWithReserve will burn the 41 plus 9 from the reserve, reducing the outstanding 'debt' of the caller by * 50 ZCHF in total. This total is returned by the method so the caller knows how much less they owe. */ function burnWithReserve(uint256 _amountExcludingReserve /* 41 */, uint32 _reservePPM /* 20% */) external override minterOnly returns (uint256) { uint256 currentReserve = balanceOf(address(reserve)); // 18, 10% below what we should have uint256 minterReserve_ = minterReserve(); // 20 uint256 adjustedReservePPM = currentReserve < minterReserve_ ? _reservePPM * currentReserve / minterReserve_ : _reservePPM; // 18% uint256 freedAmount = 1000000 * _amountExcludingReserve / (1000000 - adjustedReservePPM); // 0.18 * 41 /0.82 = 50 minterReserveE6 -= freedAmount * _reservePPM; // reduce reserve requirements by original ratio, here 10 _transfer(address(reserve), msg.sender, freedAmount - _amountExcludingReserve); // collect 9 assigned reserve, maybe less than original reserve _burn(msg.sender, freedAmount); // 41 return freedAmount; } function burn(address _owner, uint256 _amount) override external minterOnly { _burn(_owner, _amount); } modifier minterOnly() { require(isMinter(msg.sender) || isMinter(positions[msg.sender]), "not approved minter"); _; } function notifyLoss(uint256 _amount) override external minterOnly { uint256 reserveLeft = balanceOf(address(reserve)); if (reserveLeft >= _amount){ _transfer(address(reserve), msg.sender, _amount); } else { _transfer(address(reserve), msg.sender, reserveLeft); _mint(msg.sender, _amount - reserveLeft); } } function isMinter(address _minter) override public view returns (bool){ return minters[_minter] != 0 && block.timestamp >= minters[_minter]; } function isPosition(address _position) override public view returns (address){ return positions[_position]; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; import "./IERC20.sol"; import "./IReserve.sol"; interface IFrankencoin is IERC20 { function suggestMinter(address _minter, uint256 _applicationPeriod, uint256 _applicationFee, string calldata _message) external; function registerPosition(address position) external; function denyMinter(address minter, address[] calldata helpers, string calldata message) external; function reserve() external view returns (IReserve); function isMinter(address minter) external view returns (bool); function isPosition(address position) external view returns (address); function mint(address target, uint256 amount) external; function mint(address target, uint256 amount, uint32 reservePPM, uint32 feePPM) external; function burn(uint256 amountIncludingReserve, uint32 reservePPM) external; function burnFrom(address payer, uint256 targetTotalBurnAmount, uint32 _reservePPM) external returns (uint256); function burnWithReserve(uint256 amountExcludingReserve, uint32 reservePPM) external returns (uint256); function burn(address target, uint256 amount) external; function notifyLoss(uint256 amount) external; }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IReserve { function isQualified(address sender, address[] calldata helpers) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0 <0.9.0; import "./Frankencoin.sol"; import "./IERC677Receiver.sol"; import "./ERC20PermitLight.sol"; import "./MathUtil.sol"; import "./IReserve.sol"; /** * @title Reserve pool for the Frankencoin */ contract Equity is ERC20PermitLight, MathUtil, IReserve { uint32 public constant VALUATION_FACTOR = 3; uint32 private constant QUORUM = 300; uint8 private constant BLOCK_TIME_RESOLUTION_BITS = 24; uint256 public constant MIN_HOLDING_DURATION = 90*7200 << BLOCK_TIME_RESOLUTION_BITS; // in blocks, about 90 days, set to 5 blocks for testing Frankencoin immutable public zchf; // should hopefully be grouped into one storage slot uint64 private totalVotesAnchorTime; // 40 Bit for the block number, 24 Bit sub-block time resolution uint192 private totalVotesAtAnchor; mapping (address => address) public delegates; mapping (address => uint64) private voteAnchor; // 40 Bit for the block number, 24 Bit sub-block time resolution event Delegation(address indexed from, address indexed to); event Trade(address who, int amount, uint totPrice, uint newprice); // amount pos or neg for mint or redemption constructor(Frankencoin zchf_) ERC20(18) { zchf = zchf_; } function name() override external pure returns (string memory) { return "Frankencoin Pool Share"; } function symbol() override external pure returns (string memory) { return "FPS"; } function price() public view returns (uint256){ return VALUATION_FACTOR * zchf.equity() * ONE_DEC18 / totalSupply(); } function _beforeTokenTransfer(address from, address to, uint256 amount) override internal { super._beforeTokenTransfer(from, to, amount); if (amount > 0){ uint256 roundingLoss = adjustRecipientVoteAnchor(to, amount); adjustTotalVotes(from, amount, roundingLoss); } } function canRedeem() external view returns (bool){ return canRedeem(msg.sender); } function canRedeem(address owner) public view returns (bool) { return anchorTime() - voteAnchor[owner] >= MIN_HOLDING_DURATION; } /** * @notice Decrease the total votes anchor when tokens lose their voting power due to being moved * @param from sender * @param amount amount to be sent */ function adjustTotalVotes(address from, uint256 amount, uint256 roundingLoss) internal { uint256 lostVotes = from == address(0x0) ? 0 : (anchorTime() - voteAnchor[from]) * amount; totalVotesAtAnchor = uint192(totalVotes() - roundingLoss - lostVotes); totalVotesAnchorTime = anchorTime(); } /** * @notice the vote anchor of the recipient is moved forward such that the number of calculated * votes does not change despite the higher balance. * @param to receiver address * @param amount amount to be received * @return the number of votes lost due to rounding errors */ function adjustRecipientVoteAnchor(address to, uint256 amount) internal returns (uint256){ if (to != address(0x0)) { uint256 recipientVotes = votes(to); // for example 21 if 7 shares were held for 3 blocks uint256 newbalance = balanceOf(to) + amount; // for example 11 if 4 shares are added voteAnchor[to] = uint64(anchorTime() - recipientVotes / newbalance); // new example anchor is only 21 / 11 = 1 block in the past return recipientVotes % newbalance; // we have lost 21 % 11 = 10 votes } else { // optimization for burn, vote anchor of null address does not matter return 0; } } function anchorTime() internal view returns (uint64){ return uint64(block.number << BLOCK_TIME_RESOLUTION_BITS); } function votes(address holder) public view returns (uint256) { return balanceOf(holder) * (anchorTime() - voteAnchor[holder]); } function totalVotes() public view returns (uint256) { return totalVotesAtAnchor + totalSupply() * (anchorTime() - totalVotesAnchorTime); } function isQualified(address sender, address[] calldata helpers) external override view returns (bool) { uint256 _votes = votes(sender); for (uint i=0; i<helpers.length; i++){ address current = helpers[i]; require(current != sender); require(canVoteFor(sender, current)); for (uint j=i+1; j<helpers.length; j++){ require(current != helpers[j]); // ensure helper unique } _votes += votes(current); } return _votes * 10000 >= QUORUM * totalVotes(); } function delegateVoteTo(address delegate) external { delegates[msg.sender] = delegate; emit Delegation(msg.sender, delegate); } function canVoteFor(address delegate, address owner) public view returns (bool) { if (owner == delegate){ return true; } else if (owner == address(0x0)){ return false; } else { return canVoteFor(delegate, delegates[owner]); } } function onTokenTransfer(address from, uint256 amount, bytes calldata) external returns (bool) { require(msg.sender == address(zchf), "caller must be zchf"); if (totalSupply() == 0){ require(amount >= ONE_DEC18, "initial deposit must >= 1"); // initialize with 1000 shares for 1 ZCHF uint256 initialAmount = 1000 * ONE_DEC18; _mint(from, initialAmount); amount -= ONE_DEC18; emit Trade(msg.sender, int(initialAmount), ONE_DEC18, price()); } uint256 shares = calculateSharesInternal(zchf.equity() - amount, amount); _mint(from, shares); require(totalSupply() < 2**90, "total supply exceeded"); // to guard against overflows with price and vote calculations emit Trade(msg.sender, int(shares), amount, price()); return true; } /** * @notice Calculate shares received when depositing ZCHF * @dev this function is called after the transfer of ZCHF happens * @param investment ZCHF invested, in dec18 format * @return amount of shares received for the ZCHF invested */ function calculateShares(uint256 investment) public view returns (uint256) { return calculateSharesInternal(zchf.equity(), investment); } function calculateSharesInternal(uint256 capitalBefore, uint256 investment) internal view returns (uint256) { uint256 totalShares = totalSupply(); uint256 newTotalShares = _mulD18(totalShares, _cubicRoot(_divD18(capitalBefore + investment, capitalBefore))); return newTotalShares - totalShares; } function redeem(address target, uint256 shares) public returns (uint256) { require(canRedeem(msg.sender)); uint256 proceeds = calculateProceeds(shares); _burn(msg.sender, shares); zchf.transfer(target, proceeds); emit Trade(msg.sender, -int(shares), proceeds, price()); return proceeds; } /** * @notice Calculate ZCHF received when depositing shares * @dev this function is called before any transfer happens * @param shares number of shares we want to exchange for ZCHF, * in dec18 format * @return amount of ZCHF received for the shares */ function calculateProceeds(uint256 shares) public view returns (uint256) { uint256 totalShares = totalSupply(); uint256 capital = zchf.equity(); require(shares + ONE_DEC18 < totalShares, "too many shares"); // make sure there is always at least one share uint256 newTotalShares = totalShares - shares; uint256 newCapital = _mulD18(capital, _power3(_divD18(newTotalShares, totalShares))); return capital - newCapital; } }
// SPDX-License-Identifier: MIT // Copied from https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol // and modified it. pragma solidity ^0.8.0; import "./ERC20.sol"; abstract contract ERC20PermitLight is ERC20 { /*////////////////////////////////////////////////////////////// EIP-2612 STORAGE //////////////////////////////////////////////////////////////*/ mapping(address => uint256) public nonces; /*////////////////////////////////////////////////////////////// EIP-2612 LOGIC //////////////////////////////////////////////////////////////*/ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) public { require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED"); unchecked { // unchecked to save a little gas with the nonce increment... address recoveredAddress = ecrecover( keccak256( abi.encodePacked( "\x19\x01", DOMAIN_SEPARATOR(), keccak256( abi.encode( // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"), bytes32(0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9), owner, spender, value, nonces[owner]++, deadline ) ) ) ), v, r, s ); require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER"); _approve(recoveredAddress, spender, value); } } function DOMAIN_SEPARATOR() public view returns (bytes32) { return keccak256( abi.encode( //keccak256("EIP712Domain(uint256 chainId,address verifyingContract)"); bytes32(0x47e79534a245952e8b16893a336b85a3d9ea9fa8c573f3d803afb92a79469218), block.chainid, address(this) ) ); } }
/** * SPDX-License-Identifier: MIT * * Copyright (c) 2016-2019 zOS Global Limited * */ pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. Does not include * the optional functions; to access them see `ERC20Detailed`. */ interface IERC20 { // Optional functions function name() external view returns (string memory); function symbol() external view returns (string memory); function decimals() external view returns (uint8); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `recipient`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transfer(address recipient, uint256 amount) external returns (bool); function transferAndCall(address recipient, uint256 amount, bytes calldata data) 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. * * > Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an `Approval` event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `sender` to `recipient` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a `Transfer` event. */ function transferFrom(address sender, address recipient, uint256 amount) external returns (bool); /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to `approve`. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.0 <0.9.0; /** * @title Functions for share valuation */ contract MathUtil { uint256 internal constant ONE_DEC18 = 10**18; uint256 internal constant THRESH_DEC18 = 10000000000000000;//0.01 /** * @notice Cubic root with Halley approximation * Number 1e18 decimal * @param _v number for which we calculate x**(1/3) * @return returns _v**(1/3) */ function _cubicRoot(uint256 _v) internal pure returns (uint256) { uint256 x = ONE_DEC18; uint256 xOld; bool cond; do { xOld = x; uint256 powX3 = _mulD18(_mulD18(x, x), x); x = _mulD18(x, _divD18( (powX3 + 2 * _v) , (2 * powX3 + _v))); cond = xOld > x ? xOld - x > THRESH_DEC18 : x - xOld > THRESH_DEC18; } while ( cond ); return x; } function _mulD18(uint256 _a, uint256 _b) internal pure returns(uint256) { return _a * _b / ONE_DEC18; } function _divD18(uint256 _a, uint256 _b) internal pure returns(uint256) { return (_a * ONE_DEC18) / _b ; } function _power3(uint256 _x) internal pure returns(uint256) { return _mulD18(_mulD18(_x, _x), _x); } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.0; interface IERC677Receiver { function onTokenTransfer(address from, uint256 amount, bytes calldata data) external returns (bool); }
// SPDX-License-Identifier: MIT // Copied and adjusted from OpenZeppelin // Adjustments: // - modifications to support ERC-677 // - removed require messages to save space // - removed unnecessary require statements // - removed GSN Context // - upgraded to 0.8 to drop SafeMath // - let name() and symbol() be implemented by subclass // - infinite allowance support, with 2^255 and above considered infinite pragma solidity ^0.8.0; import "./IERC20.sol"; import "./IERC677Receiver.sol"; /** * @dev Implementation of the `IERC20` interface. * * This implementation is agnostic to the way tokens are created. This means * that a supply mechanism has to be added in a derived contract using `_mint`. * For a generic mechanism see `ERC20Mintable`. * * *For a detailed writeup see our guide [How to implement supply * mechanisms](https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226).* * * We have followed general OpenZeppelin guidelines: functions revert instead * of returning `false` on failure. This behavior is nonetheless conventional * and does not conflict with the expectations of ERC20 applications. * * Additionally, an `Approval` event is emitted on calls to `transferFrom`. * This allows applications to reconstruct the allowance for all accounts just * by listening to said events. Other implementations of the EIP may not emit * these events, as it isn't required by the specification. * * Finally, the non-standard `decreaseAllowance` and `increaseAllowance` * functions have been added to mitigate the well-known issues around setting * allowances. See `IERC20.approve`. */ abstract contract ERC20 is IERC20 { mapping (address => uint256) private _balances; mapping (address => mapping (address => uint256)) private _allowances; uint256 private _totalSupply; uint8 public immutable override decimals; constructor(uint8 _decimals) { decimals = _decimals; } /** * @dev See `IERC20.totalSupply`. */ function totalSupply() public view override returns (uint256) { return _totalSupply; } /** * @dev See `IERC20.balanceOf`. */ function balanceOf(address account) public view override returns (uint256) { return _balances[account]; } /** * @dev See `IERC20.transfer`. * * Requirements: * * - `recipient` cannot be the zero address. * - the caller must have a balance of at least `amount`. */ function transfer(address recipient, uint256 amount) public virtual override returns (bool) { _transfer(msg.sender, recipient, amount); return true; } /** * @dev See `IERC20.allowance`. */ function allowance(address owner, address spender) external view override returns (uint256) { return _allowances[owner][spender]; } /** * @dev See `IERC20.approve`. * * Requirements: * * - `spender` cannot be the zero address. */ function approve(address spender, uint256 value) external override returns (bool) { _approve(msg.sender, spender, value); return true; } /** * @dev See `IERC20.transferFrom`. * * Emits an `Approval` event indicating the updated allowance. This is not * required by the EIP. See the note at the beginning of `ERC20`; * * Requirements: * - `sender` and `recipient` cannot be the zero address. * - `sender` must have a balance of at least `value`. * - the caller must have allowance for `sender`'s tokens of at least * `amount`. */ function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) { _transfer(sender, recipient, amount); uint256 currentAllowance = _allowances[sender][msg.sender]; if (currentAllowance < (1 << 255)){ // Only decrease the allowance if it was not set to 'infinite' // Documented in /doc/infiniteallowance.md require(currentAllowance >= amount, "approval not enough"); _approve(sender, msg.sender, currentAllowance - amount); } return true; } /** * @dev Moves tokens `amount` from `sender` to `recipient`. * * This is internal function is equivalent to `transfer`, and can be used to * e.g. implement automatic token fees, slashing mechanisms, etc. * * Emits a `Transfer` event. * * Requirements: * * - `sender` cannot be the zero address. * - `recipient` cannot be the zero address. * - `sender` must have a balance of at least `amount`. */ function _transfer(address sender, address recipient, uint256 amount) internal virtual { require(recipient != address(0)); _beforeTokenTransfer(sender, recipient, amount); require(_balances[sender]>=amount, "balance not enough"); _balances[sender] -= amount; _balances[recipient] += amount; emit Transfer(sender, recipient, amount); } // ERC-677 functionality, can be useful for swapping and wrapping tokens function transferAndCall(address recipient, uint256 amount, bytes calldata data) external override returns (bool) { bool success = transfer(recipient, amount); if (success){ success = IERC677Receiver(recipient).onTokenTransfer(msg.sender, amount, data); } return success; } /** @dev Creates `amount` tokens and assigns them to `account`, increasing * the total supply. * * Emits a `Transfer` event with `from` set to the zero address. * * Requirements * * - `to` cannot be the zero address. */ function _mint(address recipient, uint256 amount) internal virtual { require(recipient != address(0)); _beforeTokenTransfer(address(0), recipient, amount); _totalSupply += amount; _balances[recipient] += amount; emit Transfer(address(0), recipient, amount); } /** * @dev Destroys `amount` tokens from `account`, reducing the * total supply. * * Emits a `Transfer` event with `to` set to the zero address. * * Requirements * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens. */ function _burn(address account, uint256 amount) internal virtual { _beforeTokenTransfer(account, address(0), amount); _totalSupply -= amount; _balances[account] -= amount; emit Transfer(account, address(0), amount); } /** * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens. * * This is internal function is equivalent to `approve`, and can be used to * e.g. set automatic allowances for certain subsystems, etc. * * Emits an `Approval` event. * * Requirements: * * - `owner` cannot be the zero address. * - `spender` cannot be the zero address. */ function _approve(address owner, address spender, uint256 value) internal { _allowances[owner][spender] = value; emit Approval(owner, spender, value); } /** * @dev Hook that is called before any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens * will be to transferred to `to`. * - when `from` is zero, `amount` tokens will be minted for `to`. * - when `to` is zero, `amount` of ``from``'s tokens will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer(address from, address to, uint256 amount) virtual internal { } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } } }
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[{"inputs":[{"internalType":"contract Frankencoin","name":"zchf_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"}],"name":"Delegation","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"who","type":"address"},{"indexed":false,"internalType":"int256","name":"amount","type":"int256"},{"indexed":false,"internalType":"uint256","name":"totPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"newprice","type":"uint256"}],"name":"Trade","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DOMAIN_SEPARATOR","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MIN_HOLDING_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"VALUATION_FACTOR","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"shares","type":"uint256"}],"name":"calculateProceeds","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"investment","type":"uint256"}],"name":"calculateShares","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"canRedeem","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"canRedeem","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"delegate","type":"address"},{"internalType":"address","name":"owner","type":"address"}],"name":"canVoteFor","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"delegate","type":"address"}],"name":"delegateVoteTo","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"delegates","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address[]","name":"helpers","type":"address[]"}],"name":"isQualified","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"nonces","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onTokenTransfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"value","type":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Frankencoin","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000422d17ccc1442501d039595ffcaaa71b4686bf4e
-----Decoded View---------------
Arg [0] : zchf_ (address): 0x422d17ccC1442501D039595ffcaAa71b4686Bf4E
-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000422d17ccc1442501d039595ffcaaa71b4686bf4e
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