文件 1 的 1：StakingDFL.sol
pragma solidity ^0.5.8;
interface EIP20Interface {
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256 balance);
function transfer(address dst, uint256 amount) external returns (bool success);
function transferFrom(address src, address dst, uint256 amount) external returns (bool success);
function approve(address spender, uint256 amount) external returns (bool success);
function allowance(address owner, address spender) external view returns (uint256 remaining);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
}
pragma solidity ^0.5.8;
interface EIP20NonStandardInterface {
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256 balance);
function transfer(address dst, uint256 amount) external;
function transferFrom(address src, address dst, uint256 amount) external;
function approve(address spender, uint256 amount) external returns (bool success);
function allowance(address owner, address spender) external view returns (uint256 remaining);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
}
pragma solidity ^0.5.8;
contract CarefulMath {
enum MathError {
NO_ERROR,
DIVISION_BY_ZERO,
INTEGER_OVERFLOW,
INTEGER_UNDERFLOW
}
function mulUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (a == 0) {
return (MathError.NO_ERROR, 0);
}
uint c = a * b;
if (c / a != b) {
return (MathError.INTEGER_OVERFLOW, 0);
} else {
return (MathError.NO_ERROR, c);
}
}
function divUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (b == 0) {
return (MathError.DIVISION_BY_ZERO, 0);
}
return (MathError.NO_ERROR, a / b);
}
function subUInt(uint a, uint b) internal pure returns (MathError, uint) {
if (b <= a) {
return (MathError.NO_ERROR, a - b);
} else {
return (MathError.INTEGER_UNDERFLOW, 0);
}
}
function addUInt(uint a, uint b) internal pure returns (MathError, uint) {
uint c = a + b;
if (c >= a) {
return (MathError.NO_ERROR, c);
} else {
return (MathError.INTEGER_OVERFLOW, 0);
}
}
function addThenSubUInt(uint a, uint b, uint c) internal pure returns (MathError, uint) {
(MathError err0, uint sum) = addUInt(a, b);
if (err0 != MathError.NO_ERROR) {
return (err0, 0);
}
return subUInt(sum, c);
}
}
pragma solidity ^0.5.16;
contract Exponential is CarefulMath {
uint constant expScale = 1e18;
uint constant doubleScale = 1e36;
uint constant halfExpScale = expScale/2;
uint constant mantissaOne = expScale;
struct Exp {
uint mantissa;
}
struct Double {
uint mantissa;
}
function getExp(uint num, uint denom) pure internal returns (MathError, Exp memory) {
(MathError err0, uint scaledNumerator) = mulUInt(num, expScale);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
(MathError err1, uint rational) = divUInt(scaledNumerator, denom);
if (err1 != MathError.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: rational}));
}
function addExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError error, uint result) = addUInt(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
function subExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError error, uint result) = subUInt(a.mantissa, b.mantissa);
return (error, Exp({mantissa: result}));
}
function mulScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {
(MathError err0, uint scaledMantissa) = mulUInt(a.mantissa, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: scaledMantissa}));
}
function mulScalarTruncate(Exp memory a, uint scalar) pure internal returns (MathError, uint) {
(MathError err, Exp memory product) = mulScalar(a, scalar);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return (MathError.NO_ERROR, truncate(product));
}
function mulScalarTruncateAddUInt(Exp memory a, uint scalar, uint addend) pure internal returns (MathError, uint) {
(MathError err, Exp memory product) = mulScalar(a, scalar);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return addUInt(truncate(product), addend);
}
function divScalar(Exp memory a, uint scalar) pure internal returns (MathError, Exp memory) {
(MathError err0, uint descaledMantissa) = divUInt(a.mantissa, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return (MathError.NO_ERROR, Exp({mantissa: descaledMantissa}));
}
function divScalarByExp(uint scalar, Exp memory divisor) pure internal returns (MathError, Exp memory) {
(MathError err0, uint numerator) = mulUInt(expScale, scalar);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
return getExp(numerator, divisor.mantissa);
}
function divScalarByExpTruncate(uint scalar, Exp memory divisor) pure internal returns (MathError, uint) {
(MathError err, Exp memory fraction) = divScalarByExp(scalar, divisor);
if (err != MathError.NO_ERROR) {
return (err, 0);
}
return (MathError.NO_ERROR, truncate(fraction));
}
function mulExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
(MathError err0, uint doubleScaledProduct) = mulUInt(a.mantissa, b.mantissa);
if (err0 != MathError.NO_ERROR) {
return (err0, Exp({mantissa: 0}));
}
(MathError err1, uint doubleScaledProductWithHalfScale) = addUInt(halfExpScale, doubleScaledProduct);
if (err1 != MathError.NO_ERROR) {
return (err1, Exp({mantissa: 0}));
}
(MathError err2, uint product) = divUInt(doubleScaledProductWithHalfScale, expScale);
assert(err2 == MathError.NO_ERROR);
return (MathError.NO_ERROR, Exp({mantissa: product}));
}
function mulExp(uint a, uint b) pure internal returns (MathError, Exp memory) {
return mulExp(Exp({mantissa: a}), Exp({mantissa: b}));
}
function mulExp3(Exp memory a, Exp memory b, Exp memory c) pure internal returns (MathError, Exp memory) {
(MathError err, Exp memory ab) = mulExp(a, b);
if (err != MathError.NO_ERROR) {
return (err, ab);
}
return mulExp(ab, c);
}
function divExp(Exp memory a, Exp memory b) pure internal returns (MathError, Exp memory) {
return getExp(a.mantissa, b.mantissa);
}
function truncate(Exp memory exp) pure internal returns (uint) {
return exp.mantissa / expScale;
}
function lessThanExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa < right.mantissa;
}
function lessThanOrEqualExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa <= right.mantissa;
}
function greaterThanExp(Exp memory left, Exp memory right) pure internal returns (bool) {
return left.mantissa > right.mantissa;
}
function isZeroExp(Exp memory value) pure internal returns (bool) {
return value.mantissa == 0;
}
function safe224(uint n, string memory errorMessage) pure internal returns (uint224) {
require(n < 2**224, errorMessage);
return uint224(n);
}
function safe32(uint n, string memory errorMessage) pure internal returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function add_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(uint a, uint b) pure internal returns (uint) {
return add_(a, b, "addition overflow");
}
function add_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
uint c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(uint a, uint b) pure internal returns (uint) {
return sub_(a, b, "subtraction underflow");
}
function sub_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
require(b <= a, errorMessage);
return a - b;
}
function mul_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale});
}
function mul_(Exp memory a, uint b) pure internal returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Exp memory b) pure internal returns (uint) {
return mul_(a, b.mantissa) / expScale;
}
function mul_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale});
}
function mul_(Double memory a, uint b) pure internal returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Double memory b) pure internal returns (uint) {
return mul_(a, b.mantissa) / doubleScale;
}
function mul_(uint a, uint b) pure internal returns (uint) {
return mul_(a, b, "multiplication overflow");
}
function mul_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
if (a == 0 || b == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, errorMessage);
return c;
}
function div_(Exp memory a, Exp memory b) pure internal returns (Exp memory) {
return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)});
}
function div_(Exp memory a, uint b) pure internal returns (Exp memory) {
return Exp({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Exp memory b) pure internal returns (uint) {
return div_(mul_(a, expScale), b.mantissa);
}
function div_(Double memory a, Double memory b) pure internal returns (Double memory) {
return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)});
}
function div_(Double memory a, uint b) pure internal returns (Double memory) {
return Double({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Double memory b) pure internal returns (uint) {
return div_(mul_(a, doubleScale), b.mantissa);
}
function div_(uint a, uint b) pure internal returns (uint) {
return div_(a, b, "divide by zero");
}
function div_(uint a, uint b, string memory errorMessage) pure internal returns (uint) {
require(b > 0, errorMessage);
return a / b;
}
function fraction(uint a, uint b) pure internal returns (Double memory) {
return Double({mantissa: div_(mul_(a, doubleScale), b)});
}
}
pragma solidity ^0.5.16;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return sub(a, b, "SafeMath: subtraction underflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, errorMessage);
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
pragma solidity ^0.5.16;
contract ReentrancyGuard {
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor () internal {
_status = _NOT_ENTERED;
}
modifier nonReentrant() {
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
_status = _ENTERED;
_;
_status = _NOT_ENTERED;
}
}
pragma solidity ^0.5.16;
contract ErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
BAD_INPUT,
REJECTION,
MATH_ERROR,
NOT_FRESH,
TOKEN_INSUFFICIENT_CASH,
TOKEN_TRANSFER_IN_FAILED,
TOKEN_TRANSFER_OUT_FAILED,
INSUFFICIENT_COLLATERAL
}
enum FailureInfo {
ADMIN_CHECK,
PARTICIPANT_CHECK,
ACCRUE_INTEREST_FAILED,
ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED,
ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED,
ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED,
BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
BORROW_CASH_NOT_AVAILABLE,
BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
BORROW_REJECTION,
BORROW_INSUFFICIENT_COLLATERAL,
MINT_REJECTION,
MINT_EXCHANGE_CALCULATION_FAILED,
MINT_EXCHANGE_RATE_READ_FAILED,
MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED,
REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED,
REDEEM_EXCHANGE_RATE_READ_FAILED,
REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
REDEEM_TRANSFER_OUT_NOT_POSSIBLE,
REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
COLLATERALIZE_REJECTION,
REDEEM_COLLATERAL_ACCUMULATED_BORROW_CALCULATION_FAILED,
REDEEM_COLLATERAL_NEW_ACCOUNT_COLLATERAL_CALCULATION_FAILED,
REDEEM_COLLATERAL_INSUFFICIENT_COLLATERAL,
LIQUIDATE_BORROW_REJECTION,
LIQUIDATE_BORROW_COLLATERAL_RATE_CALCULATION_FAILED,
LIQUIDATE_BORROW_NOT_SATISFIED,
SET_RESERVE_FACTOR_BOUNDS_CHECK,
SET_LIQUIDATE_FACTOR_BOUNDS_CHECK,
TRANSFER_NOT_ALLOWED,
TRANSFER_NOT_ENOUGH,
TRANSFER_TOO_MUCH
}
event Failure(uint error, uint info, uint detail);
function fail(Error err, FailureInfo info) internal returns (uint) {
emit Failure(uint(err), uint(info), 0);
return uint(err);
}
function failOpaque(Error err, FailureInfo info, uint opaqueError) internal returns (uint) {
emit Failure(uint(err), uint(info), opaqueError);
return uint(err);
}
}
pragma solidity ^0.5.16;
contract InterestRateModel {
bool public constant isInterestRateModel = true;
function getBorrowRate(uint cash, uint borrows, uint reserves) external view returns (uint);
function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) external view returns (uint);
}
pragma solidity ^0.5.16;
pragma experimental ABIEncoderV2;
contract Ownable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
_owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Ownable: caller is not the owner");
_;
}
function renounceOwnership() public onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract DFL is EIP20Interface, Ownable {
string public constant name = "DeFIL";
string public constant symbol = "DFL";
uint8 public constant decimals = 18;
uint96 internal _totalSupply;
mapping (address => mapping (address => uint96)) internal allowances;
mapping (address => uint96) internal balances;
mapping (address => address) public delegates;
struct Checkpoint {
uint32 fromBlock;
uint96 votes;
}
mapping (address => mapping (uint32 => Checkpoint)) public checkpoints;
mapping (address => uint32) public numCheckpoints;
bytes32 public constant DOMAIN_TYPEHASH = keccak256("EIP712Domain(string name,uint256 chainId,address verifyingContract)");
bytes32 public constant DELEGATION_TYPEHASH = keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
mapping (address => uint) public nonces;
event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
event DelegateVotesChanged(address indexed delegate, uint previousBalance, uint newBalance);
event Transfer(address indexed from, address indexed to, uint256 amount);
event Approval(address indexed owner, address indexed spender, uint256 amount);
constructor() public {
emit Transfer(address(0), address(this), 0);
}
function mint(address account, uint rawAmount) public onlyOwner {
require(account != address(0), "DFL:: mint: cannot mint to the zero address");
uint96 amount = safe96(rawAmount, "DFL::mint: amount exceeds 96 bits");
_totalSupply = add96(_totalSupply, amount, "DFL::mint: total supply exceeds");
balances[account] = add96(balances[account], amount, "DFL::mint: mint amount exceeds balance");
_moveDelegates(address(0), delegates[account], amount);
emit Transfer(address(0), account, amount);
}
function allowance(address account, address spender) external view returns (uint) {
return allowances[account][spender];
}
function approve(address spender, uint rawAmount) external returns (bool) {
uint96 amount;
if (rawAmount == uint(-1)) {
amount = uint96(-1);
} else {
amount = safe96(rawAmount, "DFL::approve: amount exceeds 96 bits");
}
allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function totalSupply() external view returns (uint) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint) {
return balances[account];
}
function transfer(address dst, uint rawAmount) external returns (bool) {
uint96 amount = safe96(rawAmount, "DFL::transfer: amount exceeds 96 bits");
_transferTokens(msg.sender, dst, amount);
return true;
}
function transferFrom(address src, address dst, uint rawAmount) external returns (bool) {
address spender = msg.sender;
uint96 spenderAllowance = allowances[src][spender];
uint96 amount = safe96(rawAmount, "DFL::approve: amount exceeds 96 bits");
if (spender != src && spenderAllowance != uint96(-1)) {
uint96 newAllowance = sub96(spenderAllowance, amount, "DFL::transferFrom: transfer amount exceeds spender allowance");
allowances[src][spender] = newAllowance;
emit Approval(src, spender, newAllowance);
}
_transferTokens(src, dst, amount);
return true;
}
function delegate(address delegatee) public {
return _delegate(msg.sender, delegatee);
}
function delegateBySig(address delegatee, uint nonce, uint expiry, uint8 v, bytes32 r, bytes32 s) public {
bytes32 domainSeparator = keccak256(abi.encode(DOMAIN_TYPEHASH, keccak256(bytes(name)), getChainId(), address(this)));
bytes32 structHash = keccak256(abi.encode(DELEGATION_TYPEHASH, delegatee, nonce, expiry));
bytes32 digest = keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
address signatory = ecrecover(digest, v, r, s);
require(signatory != address(0), "DFL::delegateBySig: invalid signature");
require(nonce == nonces[signatory]++, "DFL::delegateBySig: invalid nonce");
require(block.timestamp <= expiry, "DFL::delegateBySig: signature expired");
return _delegate(signatory, delegatee);
}
function getCurrentVotes(address account) external view returns (uint96) {
uint32 nCheckpoints = numCheckpoints[account];
return nCheckpoints > 0 ? checkpoints[account][nCheckpoints - 1].votes : 0;
}
function getPriorVotes(address account, uint blockNumber) public view returns (uint96) {
require(blockNumber < block.number, "DFL::getPriorVotes: not yet determined");
uint32 nCheckpoints = numCheckpoints[account];
if (nCheckpoints == 0) {
return 0;
}
if (checkpoints[account][nCheckpoints - 1].fromBlock <= blockNumber) {
return checkpoints[account][nCheckpoints - 1].votes;
}
if (checkpoints[account][0].fromBlock > blockNumber) {
return 0;
}
uint32 lower = 0;
uint32 upper = nCheckpoints - 1;
while (upper > lower) {
uint32 center = upper - (upper - lower) / 2;
Checkpoint memory cp = checkpoints[account][center];
if (cp.fromBlock == blockNumber) {
return cp.votes;
} else if (cp.fromBlock < blockNumber) {
lower = center;
} else {
upper = center - 1;
}
}
return checkpoints[account][lower].votes;
}
function _delegate(address delegator, address delegatee) internal {
address currentDelegate = delegates[delegator];
uint96 delegatorBalance = balances[delegator];
delegates[delegator] = delegatee;
emit DelegateChanged(delegator, currentDelegate, delegatee);
_moveDelegates(currentDelegate, delegatee, delegatorBalance);
}
function _transferTokens(address src, address dst, uint96 amount) internal {
require(src != address(0), "DFL::_transferTokens: cannot transfer from the zero address");
require(dst != address(0), "DFL::_transferTokens: cannot transfer to the zero address");
balances[src] = sub96(balances[src], amount, "DFL::_transferTokens: transfer amount exceeds balance");
balances[dst] = add96(balances[dst], amount, "DFL::_transferTokens: transfer amount overflows");
emit Transfer(src, dst, amount);
_moveDelegates(delegates[src], delegates[dst], amount);
}
function _moveDelegates(address srcRep, address dstRep, uint96 amount) internal {
if (srcRep != dstRep && amount > 0) {
if (srcRep != address(0)) {
uint32 srcRepNum = numCheckpoints[srcRep];
uint96 srcRepOld = srcRepNum > 0 ? checkpoints[srcRep][srcRepNum - 1].votes : 0;
uint96 srcRepNew = sub96(srcRepOld, amount, "DFL::_moveVotes: vote amount underflows");
_writeCheckpoint(srcRep, srcRepNum, srcRepOld, srcRepNew);
}
if (dstRep != address(0)) {
uint32 dstRepNum = numCheckpoints[dstRep];
uint96 dstRepOld = dstRepNum > 0 ? checkpoints[dstRep][dstRepNum - 1].votes : 0;
uint96 dstRepNew = add96(dstRepOld, amount, "DFL::_moveVotes: vote amount overflows");
_writeCheckpoint(dstRep, dstRepNum, dstRepOld, dstRepNew);
}
}
}
function _writeCheckpoint(address delegatee, uint32 nCheckpoints, uint96 oldVotes, uint96 newVotes) internal {
uint32 blockNumber = safe32(block.number, "DFL::_writeCheckpoint: block number exceeds 32 bits");
if (nCheckpoints > 0 && checkpoints[delegatee][nCheckpoints - 1].fromBlock == blockNumber) {
checkpoints[delegatee][nCheckpoints - 1].votes = newVotes;
} else {
checkpoints[delegatee][nCheckpoints] = Checkpoint(blockNumber, newVotes);
numCheckpoints[delegatee] = nCheckpoints + 1;
}
emit DelegateVotesChanged(delegatee, oldVotes, newVotes);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function safe96(uint n, string memory errorMessage) internal pure returns (uint96) {
require(n < 2**96, errorMessage);
return uint96(n);
}
function add96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) {
uint96 c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub96(uint96 a, uint96 b, string memory errorMessage) internal pure returns (uint96) {
require(b <= a, errorMessage);
return a - b;
}
function getChainId() internal pure returns (uint) {
uint256 chainId;
assembly { chainId := chainid() }
return chainId;
}
}
pragma solidity ^0.5.16;
contract DeFIL is ReentrancyGuard, EIP20Interface, Exponential, ErrorReporter {
string public constant name = "Certificate of eFIL";
string public constant symbol = "ceFIL";
uint8 public constant decimals = 18;
uint internal constant reserveFactorMaxMantissa = 1e18;
address public eFILAddress;
address public mFILAddress;
address public reservesOwner;
address public admin;
address public pendingAdmin;
InterestRateModel public interestRateModel;
uint internal constant initialExchangeRateMantissa = 0.002e18;
uint public reserveFactorMantissa;
uint public accrualBlockNumber;
uint public borrowIndex;
uint public totalBorrows;
uint public totalReserves;
uint public totalSupply;
bool public mintAllowed;
bool public borrowAllowed;
mapping (address => uint) internal accountTokens;
mapping (address => mapping (address => uint)) internal transferAllowances;
struct BorrowSnapshot {
uint principal;
uint interestIndex;
}
mapping(address => BorrowSnapshot) internal accountBorrows;
uint public totalCollaterals;
mapping (address => uint) internal accountCollaterals;
uint public liquidateFactorMantissa;
uint internal constant liquidateFactorMinMantissa = 1e18;
DFL public dflToken;
uint internal constant halvePeriod = 576000;
uint internal constant minSpeed = 0.00017e18;
uint public currentSpeed = 86.805721e18;
uint public nextHalveBlockNumber;
address public uniswapAddress;
address public minerLeagueAddress;
address public operatorAddress;
address public technicalAddress;
address public undistributedAddress;
uint public uniswapPercentage;
uint public minerLeaguePercentage;
uint public operatorPercentage;
uint internal constant technicalPercentage = 0.02e18;
uint internal constant dflClaimThreshold = 0.1e18;
uint public dflAccrualBlockNumber;
uint public dflSupplyIndex;
uint internal constant dflInitialSupplyIndex = 1e36;
mapping(address => uint) public dflSupplierIndex;
mapping(address => uint) public dflAccrued;
event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows);
event Mint(address minter, uint mintAmount, uint mintTokens);
event Collateralize(address collateralizer, uint collateralizeAmount);
event Redeem(address redeemer, uint redeemAmount, uint redeemTokens);
event Borrow(address borrower, uint borrowAmount, uint accountBorrows, uint totalBorrows);
event RepayBorrow(address payer, address borrower, uint repayAmount, uint accountBorrows, uint totalBorrows);
event RedeemCollateral(address redeemer, uint redeemAmount);
event LiquidateBorrow(address liquidator, address borrower, uint accountBorrows, uint accountCollaterals);
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
event NewAdmin(address oldAdmin, address newAdmin);
event MintAllowed(bool mintAllowed);
event BorrowAllowed(bool borrowAllowed);
event NewInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel);
event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa);
event NewLiquidateFactor(uint oldLiquidateFactorMantissa, uint newLiquidateFactorMantissa);
event Transfer(address indexed from, address indexed to, uint amount);
event Approval(address indexed owner, address indexed spender, uint amount);
event Failure(uint error, uint info, uint detail);
event ReservesOwnerChanged(address oldAddress, address newAddress);
event UniswapAddressChanged(address oldAddress, address newAddress);
event MinerLeagueAddressChanged(address oldAddress, address newAddress);
event OperatorAddressChanged(address oldAddress, address newAddress);
event TechnicalAddressChanged(address oldAddress, address newAddress);
event UndistributedAddressChanged(address oldAddress, address newAddress);
event ReservesReduced(address toTho, uint amount);
event AccrueDFL(uint uniswapPart, uint minerLeaguePart, uint operatorPart, uint technicalPart, uint supplyPart, uint dflSupplyIndex);
event DistributedDFL(address supplier, uint supplierDelta);
event PercentagesChanged(uint uniswapPercentage, uint minerLeaguePercentage, uint operatorPercentage);
constructor(address interestRateModelAddress,
address eFILAddress_,
address mFILAddress_,
address dflAddress_,
address reservesOwner_,
address uniswapAddress_,
address minerLeagueAddress_,
address operatorAddress_,
address technicalAddress_,
address undistributedAddress_) public {
admin = msg.sender;
accrualBlockNumber = getBlockNumber();
borrowIndex = mantissaOne;
uint err = _setReserveFactorFresh(0.5e18);
require(err == uint(Error.NO_ERROR), "setting reserve factor failed");
err = _setLiquidateFactorFresh(2e18);
require(err == uint(Error.NO_ERROR), "setting liquidate factor failed");
err = _setInterestRateModelFresh(InterestRateModel(interestRateModelAddress));
require(err == uint(Error.NO_ERROR), "setting interest rate model failed");
err = _setDFLPercentagesFresh(0.25e18, 0.1e18, 0.03e18);
require(err == uint(Error.NO_ERROR), "setting DFL percentages failed");
mintAllowed = true;
borrowAllowed = true;
eFILAddress = eFILAddress_;
mFILAddress = mFILAddress_;
dflToken = DFL(dflAddress_);
reservesOwner = reservesOwner_;
dflAccrualBlockNumber = getBlockNumber();
dflSupplyIndex = dflInitialSupplyIndex;
nextHalveBlockNumber = dflAccrualBlockNumber + halvePeriod;
uniswapAddress = uniswapAddress_;
minerLeagueAddress = minerLeagueAddress_;
operatorAddress = operatorAddress_;
technicalAddress = technicalAddress_;
undistributedAddress = undistributedAddress_;
emit Transfer(address(0), address(this), 0);
}
function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) {
if (src == dst || dst == address(0)) {
return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED);
}
accrueDFL();
distributeSupplierDFL(src, false);
distributeSupplierDFL(dst, false);
uint startingAllowance = 0;
if (spender == src) {
startingAllowance = uint(-1);
} else {
startingAllowance = transferAllowances[src][spender];
}
MathError mathErr;
uint allowanceNew;
uint srcTokensNew;
uint dstTokensNew;
(mathErr, allowanceNew) = subUInt(startingAllowance, tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED);
}
(mathErr, srcTokensNew) = subUInt(accountTokens[src], tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ENOUGH);
}
(mathErr, dstTokensNew) = addUInt(accountTokens[dst], tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_TOO_MUCH);
}
accountTokens[src] = srcTokensNew;
accountTokens[dst] = dstTokensNew;
if (startingAllowance != uint(-1)) {
transferAllowances[src][spender] = allowanceNew;
}
emit Transfer(src, dst, tokens);
return uint(Error.NO_ERROR);
}
function transfer(address dst, uint256 amount) external nonReentrant returns (bool) {
return transferTokens(msg.sender, msg.sender, dst, amount) == uint(Error.NO_ERROR);
}
function transferFrom(address src, address dst, uint256 amount) external nonReentrant returns (bool) {
return transferTokens(msg.sender, src, dst, amount) == uint(Error.NO_ERROR);
}
function approve(address spender, uint256 amount) external returns (bool) {
require(spender != address(0), "cannot approve to the zero address");
address src = msg.sender;
transferAllowances[src][spender] = amount;
emit Approval(src, spender, amount);
return true;
}
function allowance(address owner, address spender) external view returns (uint256) {
return transferAllowances[owner][spender];
}
function balanceOf(address owner) external view returns (uint256) {
return accountTokens[owner];
}
function balanceOfUnderlying(address owner) external returns (uint) {
Exp memory exchangeRate = Exp({mantissa: exchangeRateCurrent()});
(MathError mErr, uint balance) = mulScalarTruncate(exchangeRate, accountTokens[owner]);
require(mErr == MathError.NO_ERROR, "balance could not be calculated");
return balance;
}
function getCollateral(address account) external view returns (uint256) {
return accountCollaterals[account];
}
function getBlockNumber() internal view returns (uint) {
return block.number;
}
function borrowRatePerBlock() external view returns (uint) {
return interestRateModel.getBorrowRate(getCashPrior(), totalBorrows, totalReserves);
}
function supplyRatePerBlock() external view returns (uint) {
return interestRateModel.getSupplyRate(getCashPrior(), totalBorrows, totalReserves, reserveFactorMantissa);
}
function totalBorrowsCurrent() external nonReentrant returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return totalBorrows;
}
function borrowBalanceCurrent(address account) external nonReentrant returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return borrowBalanceStored(account);
}
function borrowBalanceStored(address account) public view returns (uint) {
(MathError err, uint result) = borrowBalanceStoredInternal(account);
require(err == MathError.NO_ERROR, "borrowBalanceStored: borrowBalanceStoredInternal failed");
return result;
}
function borrowBalanceStoredInternal(address account) internal view returns (MathError, uint) {
MathError mathErr;
uint principalTimesIndex;
uint result;
BorrowSnapshot storage borrowSnapshot = accountBorrows[account];
if (borrowSnapshot.principal == 0) {
return (MathError.NO_ERROR, 0);
}
(mathErr, principalTimesIndex) = mulUInt(borrowSnapshot.principal, borrowIndex);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
(mathErr, result) = divUInt(principalTimesIndex, borrowSnapshot.interestIndex);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
return (MathError.NO_ERROR, result);
}
function exchangeRateCurrent() public returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return exchangeRateStored();
}
function exchangeRateStored() public view returns (uint) {
(MathError err, uint result) = exchangeRateStoredInternal();
require(err == MathError.NO_ERROR, "exchangeRateStored: exchangeRateStoredInternal failed");
return result;
}
function exchangeRateStoredInternal() internal view returns (MathError, uint) {
uint _totalSupply = totalSupply;
if (_totalSupply == 0) {
return (MathError.NO_ERROR, initialExchangeRateMantissa);
} else {
uint totalCash = getCashPrior();
uint cashPlusBorrowsMinusReserves;
Exp memory exchangeRate;
MathError mathErr;
(mathErr, cashPlusBorrowsMinusReserves) = addThenSubUInt(totalCash, totalBorrows, totalReserves);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
(mathErr, exchangeRate) = getExp(cashPlusBorrowsMinusReserves, _totalSupply);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0);
}
return (MathError.NO_ERROR, exchangeRate.mantissa);
}
}
function collateralRateCurrent(address borrower) external returns (uint) {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
return collateralRateStored(borrower);
}
function collateralRateStored(address borrower) public view returns (uint) {
(MathError err, uint rate, ,) = collateralRateInternal(borrower);
require(err == MathError.NO_ERROR, "collateralRateStored: collateralRateInternal failed");
return rate;
}
function collateralRateInternal(address borrower) internal view returns (MathError, uint, uint, uint) {
MathError mathErr;
uint _accountBorrows;
uint _accountCollaterals;
Exp memory collateralRate;
(mathErr, _accountBorrows) = borrowBalanceStoredInternal(borrower);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0, 0, 0);
}
_accountCollaterals = accountCollaterals[borrower];
(mathErr, collateralRate) = getExp(_accountBorrows, _accountCollaterals);
if (mathErr != MathError.NO_ERROR) {
return (mathErr, 0, 0, 0);
}
return (MathError.NO_ERROR, collateralRate.mantissa, _accountBorrows, _accountCollaterals);
}
function accruedDFLCurrent(address supplier) external nonReentrant returns (uint) {
accrueDFL();
return accruedDFLStoredInternal(supplier);
}
function accruedDFLStored(address supplier) public view returns (uint) {
return accruedDFLStoredInternal(supplier);
}
function accruedDFLStoredInternal(address supplier) internal view returns(uint) {
Double memory supplyIndex = Double({mantissa: dflSupplyIndex});
Double memory supplierIndex = Double({mantissa: dflSupplierIndex[supplier]});
if (supplierIndex.mantissa == 0 && supplyIndex.mantissa > 0) {
supplierIndex.mantissa = dflInitialSupplyIndex;
}
Double memory deltaIndex = sub_(supplyIndex, supplierIndex);
uint supplierDelta = mul_(accountTokens[supplier], deltaIndex);
uint supplierAccrued = add_(dflAccrued[supplier], supplierDelta);
return supplierAccrued;
}
function getCash() external view returns (uint) {
return getCashPrior();
}
function accrueInterest() public returns (uint) {
uint currentBlockNumber = getBlockNumber();
uint accrualBlockNumberPrior = accrualBlockNumber;
if (accrualBlockNumberPrior == currentBlockNumber) {
return uint(Error.NO_ERROR);
}
uint cashPrior = getCashPrior();
uint borrowsPrior = totalBorrows;
uint reservesPrior = totalReserves;
uint borrowIndexPrior = borrowIndex;
uint borrowRateMantissa = interestRateModel.getBorrowRate(cashPrior, borrowsPrior, reservesPrior);
(MathError mathErr, uint blockDelta) = subUInt(currentBlockNumber, accrualBlockNumberPrior);
require(mathErr == MathError.NO_ERROR, "could not calculate block delta");
Exp memory simpleInterestFactor;
uint interestAccumulated;
uint totalBorrowsNew;
uint totalReservesNew;
uint borrowIndexNew;
(mathErr, simpleInterestFactor) = mulScalar(Exp({mantissa: borrowRateMantissa}), blockDelta);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_SIMPLE_INTEREST_FACTOR_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, interestAccumulated) = mulScalarTruncate(simpleInterestFactor, borrowsPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, totalBorrowsNew) = addUInt(interestAccumulated, borrowsPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_BORROWS_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, totalReservesNew) = mulScalarTruncateAddUInt(Exp({mantissa: reserveFactorMantissa}), interestAccumulated, reservesPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_TOTAL_RESERVES_CALCULATION_FAILED, uint(mathErr));
}
(mathErr, borrowIndexNew) = mulScalarTruncateAddUInt(simpleInterestFactor, borrowIndexPrior, borrowIndexPrior);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.ACCRUE_INTEREST_NEW_BORROW_INDEX_CALCULATION_FAILED, uint(mathErr));
}
accrualBlockNumber = currentBlockNumber;
borrowIndex = borrowIndexNew;
totalBorrows = totalBorrowsNew;
totalReserves = totalReservesNew;
emit AccrueInterest(cashPrior, interestAccumulated, borrowIndexNew, totalBorrowsNew);
return uint(Error.NO_ERROR);
}
function mint(uint mintAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
distributeSupplierDFL(msg.sender, false);
(err,) = mintFresh(msg.sender, mintAmount);
return err;
}
struct MintLocalVars {
Error err;
MathError mathErr;
uint exchangeRateMantissa;
uint mintTokens;
uint totalSupplyNew;
uint accountTokensNew;
uint actualMintAmount;
}
function mintFresh(address minter, uint mintAmount) internal returns (uint, uint) {
if (!mintAllowed || accountCollaterals[minter] != 0) {
return (fail(Error.REJECTION, FailureInfo.MINT_REJECTION), 0);
}
MintLocalVars memory vars;
(vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal();
if (vars.mathErr != MathError.NO_ERROR) {
return (failOpaque(Error.MATH_ERROR, FailureInfo.MINT_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr)), 0);
}
vars.actualMintAmount = doTransferIn(eFILAddress, minter, mintAmount);
(vars.mathErr, vars.mintTokens) = divScalarByExpTruncate(vars.actualMintAmount, Exp({mantissa: vars.exchangeRateMantissa}));
require(vars.mathErr == MathError.NO_ERROR, "MINT_EXCHANGE_CALCULATION_FAILED");
(vars.mathErr, vars.totalSupplyNew) = addUInt(totalSupply, vars.mintTokens);
require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED");
(vars.mathErr, vars.accountTokensNew) = addUInt(accountTokens[minter], vars.mintTokens);
require(vars.mathErr == MathError.NO_ERROR, "MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED");
totalSupply = vars.totalSupplyNew;
accountTokens[minter] = vars.accountTokensNew;
emit Mint(minter, vars.actualMintAmount, vars.mintTokens);
emit Transfer(address(this), minter, vars.mintTokens);
return (uint(Error.NO_ERROR), vars.actualMintAmount);
}
function collateralize(uint collateralizeAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
(err,) = collateralizeFresh(msg.sender, collateralizeAmount);
return err;
}
struct CollateralizeLocalVars {
Error err;
MathError mathErr;
uint totalCollateralsNew;
uint accountCollateralsNew;
uint actualCollateralizeAmount;
}
function collateralizeFresh(address collateralizer, uint collateralizeAmount) internal returns (uint, uint) {
if (accountTokens[collateralizer] != 0) {
return (fail(Error.REJECTION, FailureInfo.COLLATERALIZE_REJECTION), 0);
}
CollateralizeLocalVars memory vars;
vars.actualCollateralizeAmount = doTransferIn(mFILAddress, collateralizer, collateralizeAmount);
(vars.mathErr, vars.totalCollateralsNew) = addUInt(totalCollaterals, vars.actualCollateralizeAmount);
require(vars.mathErr == MathError.NO_ERROR, "COLLATERALIZE_NEW_TOTAL_COLLATERALS_CALCULATION_FAILED");
(vars.mathErr, vars.accountCollateralsNew) = addUInt(accountCollaterals[collateralizer], vars.actualCollateralizeAmount);
require(vars.mathErr == MathError.NO_ERROR, "COLLATERALIZE_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED");
totalCollaterals = vars.totalCollateralsNew;
accountCollaterals[collateralizer] = vars.accountCollateralsNew;
emit Collateralize(collateralizer, vars.actualCollateralizeAmount);
return (uint(Error.NO_ERROR), vars.actualCollateralizeAmount);
}
function redeem(uint redeemTokens) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
distributeSupplierDFL(msg.sender, false);
return redeemFresh(msg.sender, redeemTokens, 0);
}
function redeemUnderlying(uint redeemAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
distributeSupplierDFL(msg.sender, false);
return redeemFresh(msg.sender, 0, redeemAmount);
}
struct RedeemLocalVars {
Error err;
MathError mathErr;
uint exchangeRateMantissa;
uint redeemTokens;
uint redeemAmount;
uint totalSupplyNew;
uint accountTokensNew;
}
function redeemFresh(address redeemer, uint redeemTokensIn, uint redeemAmountIn) internal returns (uint) {
require(redeemTokensIn == 0 || redeemAmountIn == 0, "one of redeemTokensIn or redeemAmountIn must be zero");
RedeemLocalVars memory vars;
(vars.mathErr, vars.exchangeRateMantissa) = exchangeRateStoredInternal();
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_RATE_READ_FAILED, uint(vars.mathErr));
}
if (redeemTokensIn > 0) {
vars.redeemTokens = redeemTokensIn;
(vars.mathErr, vars.redeemAmount) = mulScalarTruncate(Exp({mantissa: vars.exchangeRateMantissa}), redeemTokensIn);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED, uint(vars.mathErr));
}
} else {
(vars.mathErr, vars.redeemTokens) = divScalarByExpTruncate(redeemAmountIn, Exp({mantissa: vars.exchangeRateMantissa}));
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED, uint(vars.mathErr));
}
vars.redeemAmount = redeemAmountIn;
}
(vars.mathErr, vars.totalSupplyNew) = subUInt(totalSupply, vars.redeemTokens);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED, uint(vars.mathErr));
}
(vars.mathErr, vars.accountTokensNew) = subUInt(accountTokens[redeemer], vars.redeemTokens);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
if (getCashPrior() < vars.redeemAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDEEM_TRANSFER_OUT_NOT_POSSIBLE);
}
doTransferOut(eFILAddress, redeemer, vars.redeemAmount);
totalSupply = vars.totalSupplyNew;
accountTokens[redeemer] = vars.accountTokensNew;
emit Transfer(redeemer, address(this), vars.redeemTokens);
emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens);
return uint(Error.NO_ERROR);
}
function borrow(uint borrowAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
return borrowFresh(msg.sender, borrowAmount);
}
struct BorrowLocalVars {
MathError mathErr;
uint actualBorrowAmount;
uint accountBorrows;
uint accountBorrowsNew;
uint totalBorrowsNew;
}
function borrowFresh(address borrower, uint borrowAmount) internal returns (uint) {
if (!borrowAllowed) {
return fail(Error.REJECTION, FailureInfo.BORROW_REJECTION);
}
BorrowLocalVars memory vars;
(vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
if (borrowAmount == uint(-1)) {
vars.actualBorrowAmount = accountCollaterals[borrower] > vars.accountBorrows ? accountCollaterals[borrower] - vars.accountBorrows : 0;
} else {
vars.actualBorrowAmount = borrowAmount;
}
if (getCashPrior() < vars.actualBorrowAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE);
}
(vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, vars.actualBorrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
if (accountCollaterals[borrower] < vars.accountBorrowsNew) {
return fail(Error.INSUFFICIENT_COLLATERAL, FailureInfo.BORROW_INSUFFICIENT_COLLATERAL);
}
(vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, vars.actualBorrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
doTransferOut(eFILAddress, borrower, vars.actualBorrowAmount);
accountBorrows[borrower].principal = vars.accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
emit Borrow(borrower, vars.actualBorrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);
return uint(Error.NO_ERROR);
}
function repayBorrow(uint repayAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
(err,) = repayBorrowFresh(msg.sender, msg.sender, repayAmount);
return err;
}
function repayBorrowBehalf(address borrower, uint repayAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
(err,) = repayBorrowFresh(msg.sender, borrower, repayAmount);
return err;
}
struct RepayBorrowLocalVars {
Error err;
MathError mathErr;
uint repayAmount;
uint borrowerIndex;
uint accountBorrows;
uint accountBorrowsNew;
uint totalBorrowsNew;
uint actualRepayAmount;
}
function repayBorrowFresh(address payer, address borrower, uint repayAmount) internal returns (uint, uint) {
RepayBorrowLocalVars memory vars;
vars.borrowerIndex = accountBorrows[borrower].interestIndex;
(vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(borrower);
if (vars.mathErr != MathError.NO_ERROR) {
return (failOpaque(Error.MATH_ERROR, FailureInfo.REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED, uint(vars.mathErr)), 0);
}
if (repayAmount == uint(-1)) {
vars.repayAmount = vars.accountBorrows;
} else {
vars.repayAmount = repayAmount;
}
vars.actualRepayAmount = doTransferIn(eFILAddress, payer, vars.repayAmount);
(vars.mathErr, vars.accountBorrowsNew) = subUInt(vars.accountBorrows, vars.actualRepayAmount);
require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED");
(vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.actualRepayAmount);
require(vars.mathErr == MathError.NO_ERROR, "REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED");
accountBorrows[borrower].principal = vars.accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
emit RepayBorrow(payer, borrower, vars.actualRepayAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);
return (uint(Error.NO_ERROR), vars.actualRepayAmount);
}
function redeemCollateral(uint redeemAmount) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
return redeemCollateralFresh(msg.sender, redeemAmount);
}
struct RedeemCollateralLocalVars {
Error err;
MathError mathErr;
uint redeemAmount;
uint accountBorrows;
uint accountCollateralsOld;
uint accountCollateralsNew;
uint totalCollateralsNew;
}
function redeemCollateralFresh(address redeemer, uint redeemAmount) internal returns (uint) {
RedeemCollateralLocalVars memory vars;
(vars.mathErr, vars.accountBorrows) = borrowBalanceStoredInternal(redeemer);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_COLLATERAL_ACCUMULATED_BORROW_CALCULATION_FAILED, uint(vars.mathErr));
}
vars.accountCollateralsOld = accountCollaterals[redeemer];
if (redeemAmount == uint(-1)) {
vars.redeemAmount = vars.accountCollateralsOld >= vars.accountBorrows ? vars.accountCollateralsOld - vars.accountBorrows : 0;
} else {
vars.redeemAmount = redeemAmount;
}
(vars.mathErr, vars.accountCollateralsNew) = subUInt(accountCollaterals[redeemer], vars.redeemAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.REDEEM_COLLATERAL_NEW_ACCOUNT_COLLATERAL_CALCULATION_FAILED, uint(vars.mathErr));
}
if (vars.accountCollateralsNew < vars.accountBorrows) {
return fail(Error.INSUFFICIENT_COLLATERAL, FailureInfo.REDEEM_COLLATERAL_INSUFFICIENT_COLLATERAL);
}
(vars.mathErr, vars.totalCollateralsNew) = subUInt(totalCollaterals, vars.redeemAmount);
require(vars.mathErr == MathError.NO_ERROR, "REDEEM_COLLATERALS_NEW_TOTAL_COLLATERALS_CALCULATION_FAILED");
doTransferOut(mFILAddress, redeemer, vars.redeemAmount);
totalCollaterals = vars.totalCollateralsNew;
accountCollaterals[redeemer] = vars.accountCollateralsNew;
emit RedeemCollateral(redeemer, vars.redeemAmount);
return uint(Error.NO_ERROR);
}
function liquidateBorrow(address borrower) external nonReentrant returns (uint) {
uint err = accrueInterest();
if (err != uint(Error.NO_ERROR)) {
return fail(Error(err), FailureInfo.ACCRUE_INTEREST_FAILED);
}
accrueDFL();
return liquidateBorrowFresh(msg.sender, borrower);
}
struct LiquidateBorrowLocalVars {
Error err;
MathError mathErr;
uint accountBorrows;
uint accountCollaterals;
uint collateralRate;
uint totalBorrowsNew;
}
function liquidateBorrowFresh(address liquidator, address borrower) internal returns (uint) {
if (accountCollaterals[liquidator] != 0 || accountTokens[liquidator] != 0) {
return fail(Error.REJECTION, FailureInfo.LIQUIDATE_BORROW_REJECTION);
}
LiquidateBorrowLocalVars memory vars;
(vars.mathErr, vars.collateralRate, vars.accountBorrows, vars.accountCollaterals) = collateralRateInternal(borrower);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_BORROW_COLLATERAL_RATE_CALCULATION_FAILED, uint(vars.mathErr));
}
if (vars.collateralRate < liquidateFactorMantissa) {
return fail(Error.REJECTION, FailureInfo.LIQUIDATE_BORROW_NOT_SATISFIED);
}
require(doTransferIn(eFILAddress, liquidator, vars.accountBorrows) == vars.accountBorrows, "LIQUIDATE_BORROW_TRANSFER_IN_FAILED");
(vars.mathErr, vars.totalBorrowsNew) = subUInt(totalBorrows, vars.accountBorrows);
require(vars.mathErr == MathError.NO_ERROR, "LIQUIDATE_BORROW_NEW_TOTAL_BORROWS_CALCULATION_FAILED");
accountBorrows[borrower].principal = 0;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
accountCollaterals[borrower] = 0;
accountCollaterals[liquidator] = vars.accountCollaterals;
emit LiquidateBorrow(liquidator, borrower, vars.accountBorrows, vars.accountCollaterals);
return uint(Error.NO_ERROR);
}
function accrueDFL() internal {
uint startBlockNumber = dflAccrualBlockNumber;
uint endBlockNumber = startBlockNumber;
uint currentBlockNumber = getBlockNumber();
while (endBlockNumber < currentBlockNumber) {
if (currentSpeed < minSpeed) {
break;
}
startBlockNumber = endBlockNumber;
if (currentBlockNumber < nextHalveBlockNumber) {
endBlockNumber = currentBlockNumber;
} else {
endBlockNumber = nextHalveBlockNumber;
}
distributeAndUpdateSupplyIndex(startBlockNumber, endBlockNumber);
if (endBlockNumber == nextHalveBlockNumber) {
nextHalveBlockNumber = nextHalveBlockNumber + halvePeriod;
currentSpeed = currentSpeed / 2;
}
}
dflAccrualBlockNumber = currentBlockNumber;
}
function distributeAndUpdateSupplyIndex(uint startBlockNumber, uint endBlockNumber) internal {
uint deltaBlocks = sub_(endBlockNumber, startBlockNumber);
if (deltaBlocks > 0) {
uint deltaDFLs = mul_(deltaBlocks, currentSpeed);
dflToken.mint(address(this), deltaDFLs);
uint uniswapPart = div_(mul_(uniswapPercentage, deltaDFLs), mantissaOne);
uint minerLeaguePart = div_(mul_(minerLeaguePercentage, deltaDFLs), mantissaOne);
uint operatorPart = div_(mul_(operatorPercentage, deltaDFLs), mantissaOne);
uint technicalPart = div_(mul_(technicalPercentage, deltaDFLs), mantissaOne);
uint supplyPart = sub_(sub_(sub_(sub_(deltaDFLs, uniswapPart), minerLeaguePart), operatorPart), technicalPart);
dflAccrued[uniswapAddress] = add_(dflAccrued[uniswapAddress], uniswapPart);
dflAccrued[minerLeagueAddress] = add_(dflAccrued[minerLeagueAddress], minerLeaguePart);
dflAccrued[operatorAddress] = add_(dflAccrued[operatorAddress], operatorPart);
dflAccrued[technicalAddress] = add_(dflAccrued[technicalAddress], technicalPart);
if (totalSupply > 0) {
Double memory ratio = fraction(supplyPart, totalSupply);
Double memory index = add_(Double({mantissa: dflSupplyIndex}), ratio);
dflSupplyIndex = index.mantissa;
} else {
dflAccrued[undistributedAddress] = add_(dflAccrued[undistributedAddress], supplyPart);
}
emit AccrueDFL(uniswapPart, minerLeaguePart, operatorPart, technicalPart, supplyPart, dflSupplyIndex);
}
}
function distributeSupplierDFL(address supplier, bool distributeAll) internal {
require(dflAccrualBlockNumber == getBlockNumber(), "FRESHNESS_CHECK");
uint supplierAccrued = accruedDFLStoredInternal(supplier);
dflAccrued[supplier] = transferDFL(supplier, supplierAccrued, distributeAll ? 0 : dflClaimThreshold);
dflSupplierIndex[supplier] = dflSupplyIndex;
emit DistributedDFL(supplier, supplierAccrued - dflAccrued[supplier]);
}
function transferDFL(address user, uint userAccrued, uint threshold) internal returns (uint) {
if (userAccrued >= threshold && userAccrued > 0) {
uint dflRemaining = dflToken.balanceOf(address(this));
if (userAccrued <= dflRemaining) {
dflToken.transfer(user, userAccrued);
return 0;
}
}
return userAccrued;
}
function claimDFL() public nonReentrant {
accrueDFL();
distributeSupplierDFL(msg.sender, true);
}
function claimDFL(address[] memory holders) public nonReentrant {
accrueDFL();
for (uint i = 0; i < holders.length; i++) {
distributeSupplierDFL(holders[i], true);
}
}
function claimReserves() public nonReentrant {
require(accrueInterest() == uint(Error.NO_ERROR), "accrue interest failed");
uint cash = getCashPrior();
uint actualAmount = cash > totalReserves ? totalReserves : cash;
doTransferOut(eFILAddress, reservesOwner, actualAmount);
totalReserves = sub_(totalReserves, actualAmount);
emit ReservesReduced(reservesOwner, actualAmount);
}
function _setPendingAdmin(address newPendingAdmin) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
address oldPendingAdmin = pendingAdmin;
pendingAdmin = newPendingAdmin;
emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin);
return uint(Error.NO_ERROR);
}
function _acceptAdmin() external returns (uint) {
if (msg.sender != pendingAdmin || msg.sender == address(0)) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
address oldAdmin = admin;
address oldPendingAdmin = pendingAdmin;
admin = pendingAdmin;
pendingAdmin = address(0);
emit NewAdmin(oldAdmin, admin);
emit NewPendingAdmin(oldPendingAdmin, pendingAdmin);
return uint(Error.NO_ERROR);
}
function _setMintAllowed(bool mintAllowed_) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (mintAllowed != mintAllowed_) {
mintAllowed = mintAllowed_;
emit MintAllowed(mintAllowed_);
}
return uint(Error.NO_ERROR);
}
function _setBorrowAllowed(bool borrowAllowed_) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (borrowAllowed != borrowAllowed_) {
borrowAllowed = borrowAllowed_;
emit BorrowAllowed(borrowAllowed_);
}
return uint(Error.NO_ERROR);
}
function _setReserveFactor(uint newReserveFactorMantissa) external nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.ACCRUE_INTEREST_FAILED);
}
return _setReserveFactorFresh(newReserveFactorMantissa);
}
function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (newReserveFactorMantissa > reserveFactorMaxMantissa) {
return fail(Error.BAD_INPUT, FailureInfo.SET_RESERVE_FACTOR_BOUNDS_CHECK);
}
uint oldReserveFactorMantissa = reserveFactorMantissa;
reserveFactorMantissa = newReserveFactorMantissa;
emit NewReserveFactor(oldReserveFactorMantissa, newReserveFactorMantissa);
return uint(Error.NO_ERROR);
}
function _setLiquidateFactor(uint newLiquidateFactorMantissa) external nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.ACCRUE_INTEREST_FAILED);
}
return _setLiquidateFactorFresh(newLiquidateFactorMantissa);
}
function _setLiquidateFactorFresh(uint newLiquidateFactorMantissa) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (newLiquidateFactorMantissa < liquidateFactorMinMantissa) {
return fail(Error.BAD_INPUT, FailureInfo.SET_LIQUIDATE_FACTOR_BOUNDS_CHECK);
}
uint oldLiquidateFactorMantissa = liquidateFactorMantissa;
liquidateFactorMantissa = newLiquidateFactorMantissa;
emit NewLiquidateFactor(oldLiquidateFactorMantissa, newLiquidateFactorMantissa);
return uint(Error.NO_ERROR);
}
function _setInterestRateModel(InterestRateModel newInterestRateModel) public nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.ACCRUE_INTEREST_FAILED);
}
return _setInterestRateModelFresh(newInterestRateModel);
}
function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) {
InterestRateModel oldInterestRateModel;
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
oldInterestRateModel = interestRateModel;
require(newInterestRateModel.isInterestRateModel(), "marker method returned false");
interestRateModel = newInterestRateModel;
emit NewInterestRateModel(oldInterestRateModel, newInterestRateModel);
return uint(Error.NO_ERROR);
}
function _setReservesOwner(address newReservesOwner) public returns (uint) {
claimReserves();
return _setReservesOwnerFresh(newReservesOwner);
}
function _setReservesOwnerFresh(address newReservesOwner) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
address oldReservesOwner = reservesOwner;
reservesOwner = newReservesOwner;
emit ReservesOwnerChanged(oldReservesOwner, newReservesOwner);
return uint(Error.NO_ERROR);
}
function _setMinerLeagueAddress(address newMinerLeagueAddress) external nonReentrant returns (uint) {
accrueDFL();
return _setMinerLeagueAddressFresh(newMinerLeagueAddress);
}
function _setMinerLeagueAddressFresh(address newMinerLeagueAddress) internal returns (uint) {
if (msg.sender != minerLeagueAddress) {
return fail(Error.UNAUTHORIZED, FailureInfo.PARTICIPANT_CHECK);
}
if (dflAccrued[minerLeagueAddress] != 0) {
doTransferOut(address(dflToken), minerLeagueAddress, dflAccrued[minerLeagueAddress]);
delete dflAccrued[minerLeagueAddress];
}
address oldMinerLeagueAddress = minerLeagueAddress;
minerLeagueAddress = newMinerLeagueAddress;
emit MinerLeagueAddressChanged(oldMinerLeagueAddress, newMinerLeagueAddress);
return uint(Error.NO_ERROR);
}
function _setOperatorAddress(address newOperatorAddress) external nonReentrant returns (uint) {
accrueDFL();
return _setOperatorAddressFresh(newOperatorAddress);
}
function _setOperatorAddressFresh(address newOperatorAddress) internal returns (uint) {
if (msg.sender != operatorAddress) {
return fail(Error.UNAUTHORIZED, FailureInfo.PARTICIPANT_CHECK);
}
if (dflAccrued[operatorAddress] != 0) {
doTransferOut(address(dflToken), operatorAddress, dflAccrued[operatorAddress]);
delete dflAccrued[operatorAddress];
}
address oldOperatorAddress = operatorAddress;
operatorAddress = newOperatorAddress;
emit OperatorAddressChanged(oldOperatorAddress, newOperatorAddress);
return uint(Error.NO_ERROR);
}
function _setTechnicalAddress(address newTechnicalAddress) external nonReentrant returns (uint) {
accrueDFL();
return _setTechnicalAddressFresh(newTechnicalAddress);
}
function _setTechnicalAddressFresh(address newTechnicalAddress) internal returns (uint) {
if (msg.sender != technicalAddress) {
return fail(Error.UNAUTHORIZED, FailureInfo.PARTICIPANT_CHECK);
}
if (dflAccrued[technicalAddress] != 0) {
doTransferOut(address(dflToken), technicalAddress, dflAccrued[technicalAddress]);
delete dflAccrued[technicalAddress];
}
address oldTechnicalAddress = technicalAddress;
technicalAddress = newTechnicalAddress;
emit TechnicalAddressChanged(oldTechnicalAddress, newTechnicalAddress);
return uint(Error.NO_ERROR);
}
function _setUniswapAddress(address newUniswapAddress) external nonReentrant returns (uint) {
accrueDFL();
return _setUniswapAddressFresh(newUniswapAddress);
}
function _setUniswapAddressFresh(address newUniswapAddress) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (dflAccrued[uniswapAddress] != 0) {
doTransferOut(address(dflToken), uniswapAddress, dflAccrued[uniswapAddress]);
delete dflAccrued[uniswapAddress];
}
address oldUniswapAddress = uniswapAddress;
uniswapAddress = newUniswapAddress;
emit UniswapAddressChanged(oldUniswapAddress, newUniswapAddress);
return uint(Error.NO_ERROR);
}
function _setUndistributedAddress(address newUndistributedAddress) external nonReentrant returns (uint) {
accrueDFL();
return _setUndistributedAddressFresh(newUndistributedAddress);
}
function _setUndistributedAddressFresh(address newUndistributedAddress) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
if (dflAccrued[undistributedAddress] != 0) {
doTransferOut(address(dflToken), undistributedAddress, dflAccrued[undistributedAddress]);
delete dflAccrued[undistributedAddress];
}
address oldUndistributedAddress = undistributedAddress;
undistributedAddress = newUndistributedAddress;
emit UndistributedAddressChanged(oldUndistributedAddress, newUndistributedAddress);
return uint(Error.NO_ERROR);
}
function _setDFLPercentages(uint uniswapPercentage_,
uint minerLeaguePercentage_,
uint operatorPercentage_) external nonReentrant returns (uint) {
accrueDFL();
return _setDFLPercentagesFresh(uniswapPercentage_, minerLeaguePercentage_, operatorPercentage_);
}
function _setDFLPercentagesFresh(uint uniswapPercentage_,
uint minerLeaguePercentage_,
uint operatorPercentage_) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.ADMIN_CHECK);
}
uint sumPercentage = add_(add_(add_(uniswapPercentage_, minerLeaguePercentage_), operatorPercentage_), technicalPercentage);
require(sumPercentage <= mantissaOne, "PERCENTAGE_EXCEEDS");
uniswapPercentage = uniswapPercentage_;
minerLeaguePercentage = minerLeaguePercentage_;
operatorPercentage = operatorPercentage_;
emit PercentagesChanged(uniswapPercentage_, minerLeaguePercentage_, operatorPercentage_);
return uint(Error.NO_ERROR);
}
function getCashPrior() internal view returns (uint) {
EIP20Interface token = EIP20Interface(eFILAddress);
return token.balanceOf(address(this));
}
function doTransferIn(address underlying, address from, uint amount) internal returns (uint) {
EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);
uint balanceBefore = EIP20Interface(underlying).balanceOf(address(this));
token.transferFrom(from, address(this), amount);
bool success;
assembly {
switch returndatasize()
case 0 {
success := not(0)
}
case 32 {
returndatacopy(0, 0, 32)
success := mload(0)
}
default {
revert(0, 0)
}
}
require(success, "TOKEN_TRANSFER_IN_FAILED");
uint balanceAfter = EIP20Interface(underlying).balanceOf(address(this));
require(balanceAfter >= balanceBefore, "TOKEN_TRANSFER_IN_OVERFLOW");
return balanceAfter - balanceBefore;
}
function doTransferOut(address underlying, address to, uint amount) internal {
EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);
token.transfer(to, amount);
bool success;
assembly {
switch returndatasize()
case 0 {
success := not(0)
}
case 32 {
returndatacopy(0, 0, 32)
success := mload(0)
}
default {
revert(0, 0)
}
}
require(success, "TOKEN_TRANSFER_OUT_FAILED");
}
}
pragma solidity ^0.5.16;
contract StakingDFL is ReentrancyGuard, Exponential {
using SafeMath for uint;
address public deFILAddress;
address public dflAddress;
address public eFILAddress;
address public admin;
address public pendingAdmin;
uint public minBonusAmount;
uint public sharedBonusAmount;
uint public totalDeposits;
mapping (address => uint) public accountDeposits;
uint public constant initialAccruedIndex = 1e36;
uint public accruedIndex;
mapping(address => uint) public accountAccruedIndex;
event Deposit(address account, uint amount);
event Withdraw(address account, uint amount);
event Bonus(uint amount, uint accruedIndex);
event Distributed(address account, uint amount);
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
event NewAdmin(address oldAdmin, address newAdmin);
constructor(address dflAddress_,
address eFILAddress_,
uint minBonusAmount_) public {
admin = msg.sender;
dflAddress = dflAddress_;
eFILAddress = eFILAddress_;
minBonusAmount = minBonusAmount_;
accruedIndex = initialAccruedIndex;
}
function accrueBonus() public {
DeFIL deFIL = DeFIL(deFILAddress);
deFIL.claimReserves();
if (totalDeposits == 0) {
return;
}
EIP20Interface bonusToken = EIP20Interface(eFILAddress);
uint thisBalance = bonusToken.balanceOf(address(this));
uint avaiableBalance = thisBalance.sub(sharedBonusAmount);
if (avaiableBalance < minBonusAmount) {
return;
}
Double memory ratio = fraction(avaiableBalance, totalDeposits);
Double memory doubleAccruedIndex = add_(Double({mantissa: accruedIndex}), ratio);
accruedIndex = doubleAccruedIndex.mantissa;
sharedBonusAmount = sharedBonusAmount.add(avaiableBalance);
emit Bonus(avaiableBalance, doubleAccruedIndex.mantissa);
}
function accruedBonusCurrent() external nonReentrant returns(uint) {
accrueBonus();
return accruedBonusStoredInternal(msg.sender);
}
function accruedBonusStored() public view returns(uint) {
return accruedBonusStoredInternal(msg.sender);
}
function accruedBonusStoredInternal(address account) public view returns(uint) {
Double memory doubleAccruedIndex = Double({mantissa: accruedIndex});
Double memory doubleAccountIndex = Double({mantissa: accountAccruedIndex[account]});
if (doubleAccountIndex.mantissa == 0 && doubleAccruedIndex.mantissa > 0) {
doubleAccountIndex.mantissa = initialAccruedIndex;
}
Double memory deltaIndex = sub_(doubleAccruedIndex, doubleAccountIndex);
uint accountDelta = mul_(accountDeposits[account], deltaIndex);
return accountDelta;
}
function claim(address[] memory accounts) public nonReentrant {
accrueBonus();
for (uint i = 0; i < accounts.length; i++) {
distributeBonus(accounts[i]);
}
}
function distributeBonus(address account) internal {
uint accountDelta = accruedBonusStoredInternal(account);
doTransferOut(eFILAddress, account, accountDelta);
accountAccruedIndex[account] = accruedIndex;
sharedBonusAmount = sharedBonusAmount.sub(accountDelta);
emit Distributed(account, accountDelta);
}
function deposit(uint amount) external nonReentrant {
address account = msg.sender;
accrueBonus();
distributeBonus(account);
uint actualAmount = doTransferIn(dflAddress, account, amount);
totalDeposits = totalDeposits.add(actualAmount);
accountDeposits[account] = accountDeposits[account].add(actualAmount);
emit Deposit(account, actualAmount);
}
function withdraw(uint amount) external nonReentrant {
address account = msg.sender;
require(accountDeposits[account] >= amount, "withdraw: insufficient value");
accrueBonus();
distributeBonus(account);
doTransferOut(dflAddress, account, amount);
totalDeposits = totalDeposits.sub(amount);
accountDeposits[account] = accountDeposits[account].sub(amount);
emit Withdraw(account, amount);
}
function _setPendingAdmin(address newPendingAdmin) external {
require(msg.sender == admin, "Not admin");
require(newPendingAdmin != address(0), "Bad pending admin");
address oldPendingAdmin = pendingAdmin;
pendingAdmin = newPendingAdmin;
emit NewPendingAdmin(oldPendingAdmin, newPendingAdmin);
}
function _acceptAdmin() external {
require(msg.sender == pendingAdmin && msg.sender != address(0), "Not pending admin");
address oldAdmin = admin;
address oldPendingAdmin = pendingAdmin;
admin = pendingAdmin;
pendingAdmin = address(0);
emit NewAdmin(oldAdmin, admin);
emit NewPendingAdmin(oldPendingAdmin, pendingAdmin);
}
function _setDeFILAddress(address deFILAddress_) external {
require(deFILAddress == address(0), "Can noly set once");
require(msg.sender == admin, "Not admin");
deFILAddress = deFILAddress_;
}
function _setMinBonusAmount(uint minBonusAmount_) external {
require(msg.sender == admin, "Not admin");
accrueBonus();
minBonusAmount = minBonusAmount_;
}
function doTransferIn(address underlying, address from, uint amount) internal returns (uint) {
EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);
uint balanceBefore = EIP20Interface(underlying).balanceOf(address(this));
token.transferFrom(from, address(this), amount);
bool success;
assembly {
switch returndatasize()
case 0 {
success := not(0)
}
case 32 {
returndatacopy(0, 0, 32)
success := mload(0)
}
default {
revert(0, 0)
}
}
require(success, "TOKEN_TRANSFER_IN_FAILED");
uint balanceAfter = EIP20Interface(underlying).balanceOf(address(this));
require(balanceAfter >= balanceBefore, "TOKEN_TRANSFER_IN_OVERFLOW");
return balanceAfter - balanceBefore;
}
function doTransferOut(address underlying, address to, uint amount) internal {
EIP20NonStandardInterface token = EIP20NonStandardInterface(underlying);
token.transfer(to, amount);
bool success;
assembly {
switch returndatasize()
case 0 {
success := not(0)
}
case 32 {
returndatacopy(0, 0, 32)
success := mload(0)
}
default {
revert(0, 0)
}
}
require(success, "TOKEN_TRANSFER_OUT_FAILED");
}
}
