编译器
0.5.16+commit.9c3226ce
文件 1 的 10：CarefulMath.sol
pragma solidity ^0.5.16;
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);
}
}文件 2 的 10：ComptrollerInterface.sol
pragma solidity ^0.5.16;
contract ComptrollerInterface {
bool public constant isComptroller = true;
function enterMarkets(address[] calldata sTokens) external returns (uint[] memory);
function exitMarket(address sToken) external returns (uint);
function mintAllowed(address sToken, address minter, uint mintAmount) external returns (uint);
function mintVerify(address sToken, address minter, uint mintAmount, uint mintTokens) external;
function redeemAllowed(address sToken, address redeemer, uint redeemTokens) external returns (uint);
function redeemVerify(address sToken, address redeemer, uint redeemAmount, uint redeemTokens) external;
function borrowAllowed(address sToken, address borrower, uint borrowAmount) external returns (uint);
function borrowVerify(address sToken, address borrower, uint borrowAmount) external;
function repayBorrowAllowed(
address sToken,
address payer,
address borrower,
uint repayAmount) external returns (uint);
function repayBorrowVerify(
address sToken,
address payer,
address borrower,
uint repayAmount,
uint borrowerIndex) external;
function liquidateBorrowAllowed(
address sTokenBorrowed,
address sTokenCollateral,
address liquidator,
address borrower,
uint repayAmount) external returns (uint);
function liquidateBorrowVerify(
address sTokenBorrowed,
address sTokenCollateral,
address liquidator,
address borrower,
uint repayAmount,
uint seizeTokens) external;
function seizeAllowed(
address sTokenCollateral,
address sTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens) external returns (uint);
function seizeVerify(
address sTokenCollateral,
address sTokenBorrowed,
address liquidator,
address borrower,
uint seizeTokens) external;
function transferAllowed(address sToken, address src, address dst, uint transferTokens) external returns (uint);
function transferVerify(address sToken, address src, address dst, uint transferTokens) external;
function liquidateCalculateSeizeTokens(
address sTokenBorrowed,
address sTokenCollateral,
uint repayAmount) external view returns (uint, uint);
}
文件 3 的 10：EIP20Interface.sol
pragma solidity ^0.5.16;
interface EIP20Interface {
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
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);
}
文件 4 的 10：EIP20NonStandardInterface.sol
pragma solidity ^0.5.16;
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);
}
文件 5 的 10：ErrorReporter.sol
pragma solidity ^0.5.16;
contract ComptrollerErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
COMPTROLLER_MISMATCH,
INSUFFICIENT_SHORTFALL,
INSUFFICIENT_LIQUIDITY,
INVALID_CLOSE_FACTOR,
INVALID_COLLATERAL_FACTOR,
INVALID_LIQUIDATION_INCENTIVE,
MARKET_NOT_ENTERED,
MARKET_NOT_LISTED,
MARKET_ALREADY_LISTED,
MATH_ERROR,
NONZERO_BORROW_BALANCE,
PRICE_ERROR,
REJECTION,
SNAPSHOT_ERROR,
TOO_MANY_ASSETS,
TOO_MUCH_REPAY
}
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
ACCEPT_PENDING_IMPLEMENTATION_ADDRESS_CHECK,
EXIT_MARKET_BALANCE_OWED,
EXIT_MARKET_REJECTION,
SET_CLOSE_FACTOR_OWNER_CHECK,
SET_CLOSE_FACTOR_VALIDATION,
SET_COLLATERAL_FACTOR_OWNER_CHECK,
SET_COLLATERAL_FACTOR_NO_EXISTS,
SET_COLLATERAL_FACTOR_VALIDATION,
SET_COLLATERAL_FACTOR_WITHOUT_PRICE,
SET_IMPLEMENTATION_OWNER_CHECK,
SET_LIQUIDATION_INCENTIVE_OWNER_CHECK,
SET_LIQUIDATION_INCENTIVE_VALIDATION,
SET_MAX_ASSETS_OWNER_CHECK,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_PENDING_IMPLEMENTATION_OWNER_CHECK,
SET_PRICE_ORACLE_OWNER_CHECK,
SUPPORT_MARKET_EXISTS,
SUPPORT_MARKET_OWNER_CHECK,
SET_PAUSE_GUARDIAN_OWNER_CHECK
}
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);
}
}
contract TokenErrorReporter {
enum Error {
NO_ERROR,
UNAUTHORIZED,
BAD_INPUT,
COMPTROLLER_REJECTION,
COMPTROLLER_CALCULATION_ERROR,
INTEREST_RATE_MODEL_ERROR,
INVALID_ACCOUNT_PAIR,
INVALID_CLOSE_AMOUNT_REQUESTED,
INVALID_COLLATERAL_FACTOR,
MATH_ERROR,
MARKET_NOT_FRESH,
MARKET_NOT_LISTED,
TOKEN_INSUFFICIENT_ALLOWANCE,
TOKEN_INSUFFICIENT_BALANCE,
TOKEN_INSUFFICIENT_CASH,
TOKEN_TRANSFER_IN_FAILED,
TOKEN_TRANSFER_OUT_FAILED
}
enum FailureInfo {
ACCEPT_ADMIN_PENDING_ADMIN_CHECK,
ACCRUE_INTEREST_ACCUMULATED_INTEREST_CALCULATION_FAILED,
ACCRUE_INTEREST_BORROW_RATE_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_ACCRUE_INTEREST_FAILED,
BORROW_CASH_NOT_AVAILABLE,
BORROW_FRESHNESS_CHECK,
BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
BORROW_MARKET_NOT_LISTED,
BORROW_COMPTROLLER_REJECTION,
LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED,
LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED,
LIQUIDATE_COLLATERAL_FRESHNESS_CHECK,
LIQUIDATE_COMPTROLLER_REJECTION,
LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED,
LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX,
LIQUIDATE_CLOSE_AMOUNT_IS_ZERO,
LIQUIDATE_FRESHNESS_CHECK,
LIQUIDATE_LIQUIDATOR_IS_BORROWER,
LIQUIDATE_REPAY_BORROW_FRESH_FAILED,
LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED,
LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED,
LIQUIDATE_SEIZE_COMPTROLLER_REJECTION,
LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER,
LIQUIDATE_SEIZE_TOO_MUCH,
MINT_ACCRUE_INTEREST_FAILED,
MINT_COMPTROLLER_REJECTION,
MINT_EXCHANGE_CALCULATION_FAILED,
MINT_EXCHANGE_RATE_READ_FAILED,
MINT_FRESHNESS_CHECK,
MINT_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
MINT_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
MINT_TRANSFER_IN_FAILED,
MINT_TRANSFER_IN_NOT_POSSIBLE,
REDEEM_ACCRUE_INTEREST_FAILED,
REDEEM_COMPTROLLER_REJECTION,
REDEEM_EXCHANGE_TOKENS_CALCULATION_FAILED,
REDEEM_EXCHANGE_AMOUNT_CALCULATION_FAILED,
REDEEM_EXCHANGE_RATE_READ_FAILED,
REDEEM_FRESHNESS_CHECK,
REDEEM_NEW_ACCOUNT_BALANCE_CALCULATION_FAILED,
REDEEM_NEW_TOTAL_SUPPLY_CALCULATION_FAILED,
REDEEM_TRANSFER_OUT_NOT_POSSIBLE,
REDUCE_RESERVES_ACCRUE_INTEREST_FAILED,
REDUCE_RESERVES_ADMIN_CHECK,
REDUCE_RESERVES_CASH_NOT_AVAILABLE,
REDUCE_RESERVES_FRESH_CHECK,
REDUCE_RESERVES_VALIDATION,
REPAY_BEHALF_ACCRUE_INTEREST_FAILED,
REPAY_BORROW_ACCRUE_INTEREST_FAILED,
REPAY_BORROW_ACCUMULATED_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_COMPTROLLER_REJECTION,
REPAY_BORROW_FRESHNESS_CHECK,
REPAY_BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED,
REPAY_BORROW_TRANSFER_IN_NOT_POSSIBLE,
SET_COLLATERAL_FACTOR_OWNER_CHECK,
SET_COLLATERAL_FACTOR_VALIDATION,
SET_COMPTROLLER_OWNER_CHECK,
SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED,
SET_INTEREST_RATE_MODEL_FRESH_CHECK,
SET_INTEREST_RATE_MODEL_OWNER_CHECK,
SET_MAX_ASSETS_OWNER_CHECK,
SET_ORACLE_MARKET_NOT_LISTED,
SET_PENDING_ADMIN_OWNER_CHECK,
SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED,
SET_RESERVE_FACTOR_ADMIN_CHECK,
SET_RESERVE_FACTOR_FRESH_CHECK,
SET_RESERVE_FACTOR_BOUNDS_CHECK,
TRANSFER_COMPTROLLER_REJECTION,
TRANSFER_NOT_ALLOWED,
TRANSFER_NOT_ENOUGH,
TRANSFER_TOO_MUCH,
ADD_RESERVES_ACCRUE_INTEREST_FAILED,
ADD_RESERVES_FRESH_CHECK,
ADD_RESERVES_TRANSFER_IN_NOT_POSSIBLE
}
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);
}
}文件 6 的 10：Exponential.sol
pragma solidity ^0.5.16;
import "./CarefulMath.sol";
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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure 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) internal pure returns (MathError, Exp memory) {
return mulExp(Exp({mantissa: a}), Exp({mantissa: b}));
}
function mulExp3(Exp memory a, Exp memory b, Exp memory c) internal pure 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) internal pure returns (MathError, Exp memory) {
return getExp(a.mantissa, b.mantissa);
}
function truncate(Exp memory exp) internal pure returns (uint) {
return exp.mantissa / expScale;
}
function lessThanExp(Exp memory left, Exp memory right) internal pure returns (bool) {
return left.mantissa < right.mantissa;
}
function lessThanOrEqualExp(Exp memory left, Exp memory right) internal pure returns (bool) {
return left.mantissa <= right.mantissa;
}
function greaterThanExp(Exp memory left, Exp memory right) internal pure returns (bool) {
return left.mantissa > right.mantissa;
}
function isZeroExp(Exp memory value) internal pure returns (bool) {
return value.mantissa == 0;
}
function safe224(uint n, string memory errorMessage) internal pure returns (uint224) {
require(n < 2**224, errorMessage);
return uint224(n);
}
function safe32(uint n, string memory errorMessage) internal pure returns (uint32) {
require(n < 2**32, errorMessage);
return uint32(n);
}
function add_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {
return Exp({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(Double memory a, Double memory b) internal pure returns (Double memory) {
return Double({mantissa: add_(a.mantissa, b.mantissa)});
}
function add_(uint a, uint b) internal pure returns (uint) {
return add_(a, b, "addition overflow");
}
function add_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
uint c = a + b;
require(c >= a, errorMessage);
return c;
}
function sub_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {
return Exp({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(Double memory a, Double memory b) internal pure returns (Double memory) {
return Double({mantissa: sub_(a.mantissa, b.mantissa)});
}
function sub_(uint a, uint b) internal pure returns (uint) {
return sub_(a, b, "subtraction underflow");
}
function sub_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b <= a, errorMessage);
return a - b;
}
function mul_(Exp memory a, Exp memory b) internal pure returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b.mantissa) / expScale});
}
function mul_(Exp memory a, uint b) internal pure returns (Exp memory) {
return Exp({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Exp memory b) internal pure returns (uint) {
return mul_(a, b.mantissa) / expScale;
}
function mul_(Double memory a, Double memory b) internal pure returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b.mantissa) / doubleScale});
}
function mul_(Double memory a, uint b) internal pure returns (Double memory) {
return Double({mantissa: mul_(a.mantissa, b)});
}
function mul_(uint a, Double memory b) internal pure returns (uint) {
return mul_(a, b.mantissa) / doubleScale;
}
function mul_(uint a, uint b) internal pure returns (uint) {
return mul_(a, b, "multiplication overflow");
}
function mul_(uint a, uint b, string memory errorMessage) internal pure 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) internal pure returns (Exp memory) {
return Exp({mantissa: div_(mul_(a.mantissa, expScale), b.mantissa)});
}
function div_(Exp memory a, uint b) internal pure returns (Exp memory) {
return Exp({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Exp memory b) internal pure returns (uint) {
return div_(mul_(a, expScale), b.mantissa);
}
function div_(Double memory a, Double memory b) internal pure returns (Double memory) {
return Double({mantissa: div_(mul_(a.mantissa, doubleScale), b.mantissa)});
}
function div_(Double memory a, uint b) internal pure returns (Double memory) {
return Double({mantissa: div_(a.mantissa, b)});
}
function div_(uint a, Double memory b) internal pure returns (uint) {
return div_(mul_(a, doubleScale), b.mantissa);
}
function div_(uint a, uint b) internal pure returns (uint) {
return div_(a, b, "divide by zero");
}
function div_(uint a, uint b, string memory errorMessage) internal pure returns (uint) {
require(b > 0, errorMessage);
return a / b;
}
function fraction(uint a, uint b) internal pure returns (Double memory) {
return Double({mantissa: div_(mul_(a, doubleScale), b)});
}
}
文件 7 的 10：InterestRateModel.sol
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);
}
文件 8 的 10：SEther.sol
pragma solidity ^0.5.16;
import "./SToken.sol";
contract SEther is SToken {
constructor(ComptrollerInterface comptroller_,
InterestRateModel interestRateModel_,
uint initialExchangeRateMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_,
address payable admin_) public {
admin = msg.sender;
initialize(comptroller_, interestRateModel_, initialExchangeRateMantissa_, name_, symbol_, decimals_);
admin = admin_;
}
function mint() external payable {
(uint err,) = mintInternal(msg.value);
requireNoError(err, "mint failed");
}
function redeem(uint redeemTokens) external returns (uint) {
return redeemInternal(redeemTokens);
}
function redeemUnderlying(uint redeemAmount) external returns (uint) {
return redeemUnderlyingInternal(redeemAmount);
}
function borrow(uint borrowAmount) external returns (uint) {
return borrowInternal(borrowAmount);
}
function repayBorrow() external payable {
(uint err,) = repayBorrowInternal(msg.value);
requireNoError(err, "repayBorrow failed");
}
function repayBorrowBehalf(address borrower) external payable {
(uint err,) = repayBorrowBehalfInternal(borrower, msg.value);
requireNoError(err, "repayBorrowBehalf failed");
}
function liquidateBorrow(address borrower, SToken sTokenCollateral) external payable {
(uint err,) = liquidateBorrowInternal(borrower, msg.value, sTokenCollateral);
requireNoError(err, "liquidateBorrow failed");
}
function () external payable {
(uint err,) = mintInternal(msg.value);
requireNoError(err, "mint failed");
}
function getCashPrior() internal view returns (uint) {
(MathError err, uint startingBalance) = subUInt(address(this).balance, msg.value);
require(err == MathError.NO_ERROR);
return startingBalance;
}
function doTransferIn(address from, uint amount) internal returns (uint) {
require(msg.sender == from, "sender mismatch");
require(msg.value == amount, "value mismatch");
return amount;
}
function doTransferOut(address payable to, uint amount) internal {
to.transfer(amount);
}
function requireNoError(uint errCode, string memory message) internal pure {
if (errCode == uint(Error.NO_ERROR)) {
return;
}
bytes memory fullMessage = new bytes(bytes(message).length + 5);
uint i;
for (i = 0; i < bytes(message).length; i++) {
fullMessage[i] = bytes(message)[i];
}
fullMessage[i+0] = byte(uint8(32));
fullMessage[i+1] = byte(uint8(40));
fullMessage[i+2] = byte(uint8(48 + ( errCode / 10 )));
fullMessage[i+3] = byte(uint8(48 + ( errCode % 10 )));
fullMessage[i+4] = byte(uint8(41));
require(errCode == uint(Error.NO_ERROR), string(fullMessage));
}
}
文件 9 的 10：SToken.sol
pragma solidity ^0.5.16;
import "./ComptrollerInterface.sol";
import "./STokenInterfaces.sol";
import "./ErrorReporter.sol";
import "./Exponential.sol";
import "./EIP20Interface.sol";
import "./EIP20NonStandardInterface.sol";
import "./InterestRateModel.sol";
contract SToken is STokenInterface, Exponential, TokenErrorReporter {
function initialize(ComptrollerInterface comptroller_,
InterestRateModel interestRateModel_,
uint initialExchangeRateMantissa_,
string memory name_,
string memory symbol_,
uint8 decimals_) public {
require(msg.sender == admin, "only admin may initialize the market");
require(accrualBlockNumber == 0 && borrowIndex == 0, "market may only be initialized once");
initialExchangeRateMantissa = initialExchangeRateMantissa_;
require(initialExchangeRateMantissa > 0, "initial exchange rate must be greater than zero.");
uint err = _setComptroller(comptroller_);
require(err == uint(Error.NO_ERROR), "setting comptroller failed");
accrualBlockNumber = getBlockNumber();
borrowIndex = mantissaOne;
err = _setInterestRateModelFresh(interestRateModel_);
require(err == uint(Error.NO_ERROR), "setting interest rate model failed");
name = name_;
symbol = symbol_;
decimals = decimals_;
_notEntered = true;
}
function transferTokens(address spender, address src, address dst, uint tokens) internal returns (uint) {
uint allowed = comptroller.transferAllowed(address(this), src, dst, tokens);
if (allowed != 0) {
return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.TRANSFER_COMPTROLLER_REJECTION, allowed);
}
if (src == dst) {
return fail(Error.BAD_INPUT, FailureInfo.TRANSFER_NOT_ALLOWED);
}
uint startingAllowance = 0;
if (spender == src) {
startingAllowance = uint(-1);
} else {
startingAllowance = transferAllowances[src][spender];
}
MathError mathErr;
uint allowanceNew;
uint srsTokensNew;
uint dstTokensNew;
(mathErr, allowanceNew) = subUInt(startingAllowance, tokens);
if (mathErr != MathError.NO_ERROR) {
return fail(Error.MATH_ERROR, FailureInfo.TRANSFER_NOT_ALLOWED);
}
(mathErr, srsTokensNew) = 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] = srsTokensNew;
accountTokens[dst] = dstTokensNew;
if (startingAllowance != uint(-1)) {
transferAllowances[src][spender] = allowanceNew;
}
emit Transfer(src, dst, tokens);
comptroller.transferVerify(address(this), 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) {
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 getAccountSnapshot(address account) external view returns (uint, uint, uint, uint) {
uint sTokenBalance = accountTokens[account];
uint borrowBalance;
uint exchangeRateMantissa;
MathError mErr;
(mErr, borrowBalance) = borrowBalanceStoredInternal(account);
if (mErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0, 0, 0);
}
(mErr, exchangeRateMantissa) = exchangeRateStoredInternal();
if (mErr != MathError.NO_ERROR) {
return (uint(Error.MATH_ERROR), 0, 0, 0);
}
return (uint(Error.NO_ERROR), sTokenBalance, borrowBalance, exchangeRateMantissa);
}
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 nonReentrant 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 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);
require(borrowRateMantissa <= borrowRateMaxMantissa, "borrow rate is absurdly high");
(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 mintInternal(uint mintAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return (fail(Error(error), FailureInfo.MINT_ACCRUE_INTEREST_FAILED), 0);
}
return mintFresh(msg.sender, mintAmount);
}
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) {
uint allowed = comptroller.mintAllowed(address(this), minter, mintAmount);
if (allowed != 0) {
return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.MINT_COMPTROLLER_REJECTION, allowed), 0);
}
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.MINT_FRESHNESS_CHECK), 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(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);
comptroller.mintVerify(address(this), minter, vars.actualMintAmount, vars.mintTokens);
return (uint(Error.NO_ERROR), vars.actualMintAmount);
}
function redeemInternal(uint redeemTokens) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);
}
return redeemFresh(msg.sender, redeemTokens, 0);
}
function redeemUnderlyingInternal(uint redeemAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.REDEEM_ACCRUE_INTEREST_FAILED);
}
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 payable 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;
}
uint allowed = comptroller.redeemAllowed(address(this), redeemer, vars.redeemTokens);
if (allowed != 0) {
return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REDEEM_COMPTROLLER_REJECTION, allowed);
}
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDEEM_FRESHNESS_CHECK);
}
(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(redeemer, vars.redeemAmount);
totalSupply = vars.totalSupplyNew;
accountTokens[redeemer] = vars.accountTokensNew;
emit Transfer(redeemer, address(this), vars.redeemTokens);
emit Redeem(redeemer, vars.redeemAmount, vars.redeemTokens);
comptroller.redeemVerify(address(this), redeemer, vars.redeemAmount, vars.redeemTokens);
return uint(Error.NO_ERROR);
}
function borrowInternal(uint borrowAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.BORROW_ACCRUE_INTEREST_FAILED);
}
return borrowFresh(msg.sender, borrowAmount);
}
struct BorrowLocalVars {
MathError mathErr;
uint accountBorrows;
uint accountBorrowsNew;
uint totalBorrowsNew;
}
function borrowFresh(address payable borrower, uint borrowAmount) internal returns (uint) {
uint allowed = comptroller.borrowAllowed(address(this), borrower, borrowAmount);
if (allowed != 0) {
return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.BORROW_COMPTROLLER_REJECTION, allowed);
}
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.BORROW_FRESHNESS_CHECK);
}
if (getCashPrior() < borrowAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.BORROW_CASH_NOT_AVAILABLE);
}
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));
}
(vars.mathErr, vars.accountBorrowsNew) = addUInt(vars.accountBorrows, borrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_ACCOUNT_BORROW_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
(vars.mathErr, vars.totalBorrowsNew) = addUInt(totalBorrows, borrowAmount);
if (vars.mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.BORROW_NEW_TOTAL_BALANCE_CALCULATION_FAILED, uint(vars.mathErr));
}
doTransferOut(borrower, borrowAmount);
accountBorrows[borrower].principal = vars.accountBorrowsNew;
accountBorrows[borrower].interestIndex = borrowIndex;
totalBorrows = vars.totalBorrowsNew;
emit Borrow(borrower, borrowAmount, vars.accountBorrowsNew, vars.totalBorrowsNew);
comptroller.borrowVerify(address(this), borrower, borrowAmount);
return uint(Error.NO_ERROR);
}
function repayBorrowInternal(uint repayAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return (fail(Error(error), FailureInfo.REPAY_BORROW_ACCRUE_INTEREST_FAILED), 0);
}
return repayBorrowFresh(msg.sender, msg.sender, repayAmount);
}
function repayBorrowBehalfInternal(address borrower, uint repayAmount) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return (fail(Error(error), FailureInfo.REPAY_BEHALF_ACCRUE_INTEREST_FAILED), 0);
}
return repayBorrowFresh(msg.sender, borrower, repayAmount);
}
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) {
uint allowed = comptroller.repayBorrowAllowed(address(this), payer, borrower, repayAmount);
if (allowed != 0) {
return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.REPAY_BORROW_COMPTROLLER_REJECTION, allowed), 0);
}
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.REPAY_BORROW_FRESHNESS_CHECK), 0);
}
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(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);
comptroller.repayBorrowVerify(address(this), payer, borrower, vars.actualRepayAmount, vars.borrowerIndex);
return (uint(Error.NO_ERROR), vars.actualRepayAmount);
}
function liquidateBorrowInternal(address borrower, uint repayAmount, STokenInterface sTokenCollateral) internal nonReentrant returns (uint, uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_BORROW_INTEREST_FAILED), 0);
}
error = sTokenCollateral.accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return (fail(Error(error), FailureInfo.LIQUIDATE_ACCRUE_COLLATERAL_INTEREST_FAILED), 0);
}
return liquidateBorrowFresh(msg.sender, borrower, repayAmount, sTokenCollateral);
}
function liquidateBorrowFresh(address liquidator, address borrower, uint repayAmount, STokenInterface sTokenCollateral) internal returns (uint, uint) {
uint allowed = comptroller.liquidateBorrowAllowed(address(this), address(sTokenCollateral), liquidator, borrower, repayAmount);
if (allowed != 0) {
return (failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_COMPTROLLER_REJECTION, allowed), 0);
}
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_FRESHNESS_CHECK), 0);
}
if (sTokenCollateral.accrualBlockNumber() != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.LIQUIDATE_COLLATERAL_FRESHNESS_CHECK), 0);
}
if (borrower == liquidator) {
return (fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_LIQUIDATOR_IS_BORROWER), 0);
}
if (repayAmount == 0) {
return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_ZERO), 0);
}
if (repayAmount == uint(-1)) {
return (fail(Error.INVALID_CLOSE_AMOUNT_REQUESTED, FailureInfo.LIQUIDATE_CLOSE_AMOUNT_IS_UINT_MAX), 0);
}
(uint repayBorrowError, uint actualRepayAmount) = repayBorrowFresh(liquidator, borrower, repayAmount);
if (repayBorrowError != uint(Error.NO_ERROR)) {
return (fail(Error(repayBorrowError), FailureInfo.LIQUIDATE_REPAY_BORROW_FRESH_FAILED), 0);
}
(uint amountSeizeError, uint seizeTokens) = comptroller.liquidateCalculateSeizeTokens(address(this), address(sTokenCollateral), actualRepayAmount);
require(amountSeizeError == uint(Error.NO_ERROR), "LIQUIDATE_COMPTROLLER_CALCULATE_AMOUNT_SEIZE_FAILED");
require(sTokenCollateral.balanceOf(borrower) >= seizeTokens, "LIQUIDATE_SEIZE_TOO_MUCH");
uint seizeError;
if (address(sTokenCollateral) == address(this)) {
seizeError = seizeInternal(address(this), liquidator, borrower, seizeTokens);
} else {
seizeError = sTokenCollateral.seize(liquidator, borrower, seizeTokens);
}
require(seizeError == uint(Error.NO_ERROR), "token seizure failed");
emit LiquidateBorrow(liquidator, borrower, actualRepayAmount, address(sTokenCollateral), seizeTokens);
comptroller.liquidateBorrowVerify(address(this), address(sTokenCollateral), liquidator, borrower, actualRepayAmount, seizeTokens);
return (uint(Error.NO_ERROR), actualRepayAmount);
}
function seize(address liquidator, address borrower, uint seizeTokens) external nonReentrant returns (uint) {
return seizeInternal(msg.sender, liquidator, borrower, seizeTokens);
}
function seizeInternal(address seizerToken, address liquidator, address borrower, uint seizeTokens) internal returns (uint) {
uint allowed = comptroller.seizeAllowed(address(this), seizerToken, liquidator, borrower, seizeTokens);
if (allowed != 0) {
return failOpaque(Error.COMPTROLLER_REJECTION, FailureInfo.LIQUIDATE_SEIZE_COMPTROLLER_REJECTION, allowed);
}
if (borrower == liquidator) {
return fail(Error.INVALID_ACCOUNT_PAIR, FailureInfo.LIQUIDATE_SEIZE_LIQUIDATOR_IS_BORROWER);
}
MathError mathErr;
uint borrowerTokensNew;
uint liquidatorTokensNew;
(mathErr, borrowerTokensNew) = subUInt(accountTokens[borrower], seizeTokens);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_DECREMENT_FAILED, uint(mathErr));
}
(mathErr, liquidatorTokensNew) = addUInt(accountTokens[liquidator], seizeTokens);
if (mathErr != MathError.NO_ERROR) {
return failOpaque(Error.MATH_ERROR, FailureInfo.LIQUIDATE_SEIZE_BALANCE_INCREMENT_FAILED, uint(mathErr));
}
accountTokens[borrower] = borrowerTokensNew;
accountTokens[liquidator] = liquidatorTokensNew;
emit Transfer(borrower, liquidator, seizeTokens);
comptroller.seizeVerify(address(this), seizerToken, liquidator, borrower, seizeTokens);
return uint(Error.NO_ERROR);
}
function _setPendingAdmin(address payable newPendingAdmin) external returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_PENDING_ADMIN_OWNER_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.ACCEPT_ADMIN_PENDING_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 _setComptroller(ComptrollerInterface newComptroller) public returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_COMPTROLLER_OWNER_CHECK);
}
ComptrollerInterface oldComptroller = comptroller;
require(newComptroller.isComptroller(), "marker method returned false");
comptroller = newComptroller;
emit NewComptroller(oldComptroller, newComptroller);
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.SET_RESERVE_FACTOR_ACCRUE_INTEREST_FAILED);
}
return _setReserveFactorFresh(newReserveFactorMantissa);
}
function _setReserveFactorFresh(uint newReserveFactorMantissa) internal returns (uint) {
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_RESERVE_FACTOR_ADMIN_CHECK);
}
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_RESERVE_FACTOR_FRESH_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 _addReservesInternal(uint addAmount) internal nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.ADD_RESERVES_ACCRUE_INTEREST_FAILED);
}
(error, ) = _addReservesFresh(addAmount);
return error;
}
function _addReservesFresh(uint addAmount) internal returns (uint, uint) {
uint totalReservesNew;
uint actualAddAmount;
if (accrualBlockNumber != getBlockNumber()) {
return (fail(Error.MARKET_NOT_FRESH, FailureInfo.ADD_RESERVES_FRESH_CHECK), actualAddAmount);
}
actualAddAmount = doTransferIn(msg.sender, addAmount);
totalReservesNew = totalReserves + actualAddAmount;
require(totalReservesNew >= totalReserves, "add reserves unexpected overflow");
totalReserves = totalReservesNew;
emit ReservesAdded(msg.sender, actualAddAmount, totalReservesNew);
return (uint(Error.NO_ERROR), actualAddAmount);
}
function _reduceReserves(uint reduceAmount) external nonReentrant returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.REDUCE_RESERVES_ACCRUE_INTEREST_FAILED);
}
return _reduceReservesFresh(reduceAmount);
}
function _reduceReservesFresh(uint reduceAmount) internal returns (uint) {
uint totalReservesNew;
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.REDUCE_RESERVES_ADMIN_CHECK);
}
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.REDUCE_RESERVES_FRESH_CHECK);
}
if (getCashPrior() < reduceAmount) {
return fail(Error.TOKEN_INSUFFICIENT_CASH, FailureInfo.REDUCE_RESERVES_CASH_NOT_AVAILABLE);
}
if (reduceAmount > totalReserves) {
return fail(Error.BAD_INPUT, FailureInfo.REDUCE_RESERVES_VALIDATION);
}
totalReservesNew = totalReserves - reduceAmount;
require(totalReservesNew <= totalReserves, "reduce reserves unexpected underflow");
totalReserves = totalReservesNew;
doTransferOut(admin, reduceAmount);
emit ReservesReduced(admin, reduceAmount, totalReservesNew);
return uint(Error.NO_ERROR);
}
function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint) {
uint error = accrueInterest();
if (error != uint(Error.NO_ERROR)) {
return fail(Error(error), FailureInfo.SET_INTEREST_RATE_MODEL_ACCRUE_INTEREST_FAILED);
}
return _setInterestRateModelFresh(newInterestRateModel);
}
function _setInterestRateModelFresh(InterestRateModel newInterestRateModel) internal returns (uint) {
InterestRateModel oldInterestRateModel;
if (msg.sender != admin) {
return fail(Error.UNAUTHORIZED, FailureInfo.SET_INTEREST_RATE_MODEL_OWNER_CHECK);
}
if (accrualBlockNumber != getBlockNumber()) {
return fail(Error.MARKET_NOT_FRESH, FailureInfo.SET_INTEREST_RATE_MODEL_FRESH_CHECK);
}
oldInterestRateModel = interestRateModel;
require(newInterestRateModel.isInterestRateModel(), "marker method returned false");
interestRateModel = newInterestRateModel;
emit NewMarketInterestRateModel(oldInterestRateModel, newInterestRateModel);
return uint(Error.NO_ERROR);
}
function getCashPrior() internal view returns (uint);
function doTransferIn(address from, uint amount) internal returns (uint);
function doTransferOut(address payable to, uint amount) internal;
modifier nonReentrant() {
require(_notEntered, "re-entered");
_notEntered = false;
_;
_notEntered = true;
}
}
文件 10 的 10：STokenInterfaces.sol
pragma solidity ^0.5.16;
import "./ComptrollerInterface.sol";
import "./InterestRateModel.sol";
contract STokenStorage {
bool internal _notEntered;
string public name;
string public symbol;
uint8 public decimals;
uint internal constant borrowRateMaxMantissa = 0.0005e16;
uint internal constant reserveFactorMaxMantissa = 1e18;
address payable public admin;
address payable public pendingAdmin;
ComptrollerInterface public comptroller;
InterestRateModel public interestRateModel;
uint internal initialExchangeRateMantissa;
uint public reserveFactorMantissa;
uint public accrualBlockNumber;
uint public borrowIndex;
uint public totalBorrows;
uint public totalReserves;
uint public totalSupply;
mapping (address => uint) internal accountTokens;
mapping (address => mapping (address => uint)) internal transferAllowances;
struct BorrowSnapshot {
uint principal;
uint interestIndex;
}
mapping(address => BorrowSnapshot) internal accountBorrows;
}
contract STokenInterface is STokenStorage {
bool public constant isSToken = true;
event AccrueInterest(uint cashPrior, uint interestAccumulated, uint borrowIndex, uint totalBorrows);
event Mint(address minter, uint mintAmount, uint mintTokens);
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 LiquidateBorrow(address liquidator, address borrower, uint repayAmount, address sTokenCollateral, uint seizeTokens);
event NewPendingAdmin(address oldPendingAdmin, address newPendingAdmin);
event NewAdmin(address oldAdmin, address newAdmin);
event NewComptroller(ComptrollerInterface oldComptroller, ComptrollerInterface newComptroller);
event NewMarketInterestRateModel(InterestRateModel oldInterestRateModel, InterestRateModel newInterestRateModel);
event NewReserveFactor(uint oldReserveFactorMantissa, uint newReserveFactorMantissa);
event ReservesAdded(address benefactor, uint addAmount, uint newTotalReserves);
event ReservesReduced(address admin, uint reduceAmount, uint newTotalReserves);
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);
function transfer(address dst, uint amount) external returns (bool);
function transferFrom(address src, address dst, uint amount) external returns (bool);
function approve(address spender, uint amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function balanceOfUnderlying(address owner) external returns (uint);
function getAccountSnapshot(address account) external view returns (uint, uint, uint, uint);
function borrowRatePerBlock() external view returns (uint);
function supplyRatePerBlock() external view returns (uint);
function totalBorrowsCurrent() external returns (uint);
function borrowBalanceCurrent(address account) external returns (uint);
function borrowBalanceStored(address account) public view returns (uint);
function exchangeRateCurrent() public returns (uint);
function exchangeRateStored() public view returns (uint);
function getCash() external view returns (uint);
function accrueInterest() public returns (uint);
function seize(address liquidator, address borrower, uint seizeTokens) external returns (uint);
function _setPendingAdmin(address payable newPendingAdmin) external returns (uint);
function _acceptAdmin() external returns (uint);
function _setComptroller(ComptrollerInterface newComptroller) public returns (uint);
function _setReserveFactor(uint newReserveFactorMantissa) external returns (uint);
function _reduceReserves(uint reduceAmount) external returns (uint);
function _setInterestRateModel(InterestRateModel newInterestRateModel) public returns (uint);
}
contract SErc20Storage {
address public underlying;
}
contract SErc20Interface is SErc20Storage {
function mint(uint mintAmount) external returns (uint);
function redeem(uint redeemTokens) external returns (uint);
function redeemUnderlying(uint redeemAmount) external returns (uint);
function borrow(uint borrowAmount) external returns (uint);
function repayBorrow(uint repayAmount) external returns (uint);
function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint);
function liquidateBorrow(address borrower, uint repayAmount, STokenInterface sTokenCollateral) external returns (uint);
function _addReserves(uint addAmount) external returns (uint);
}
contract SDelegationStorage {
address public implementation;
}
contract SDelegatorInterface is SDelegationStorage {
event NewImplementation(address oldImplementation, address newImplementation);
function _setImplementation(address implementation_, bool allowResign, bytes memory becomeImplementationData) public;
}
contract SDelegateInterface is SDelegationStorage {
function _becomeImplementation(bytes memory data) public;
function _resignImplementation() public;
}
{
"compilationTarget": {
"SEther.sol": "SEther"
},
"evmVersion": "istanbul",
"libraries": {},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}[{"inputs":[{"internalType":"contract ComptrollerInterface","name":"comptroller_","type":"address"},{"internalType":"contract InterestRateModel","name":"interestRateModel_","type":"address"},{"internalType":"uint256","name":"initialExchangeRateMantissa_","type":"uint256"},{"internalType":"string","name":"name_","type":"string"},{"internalType":"string","name":"symbol_","type":"string"},{"internalType":"uint8","name":"decimals_","type":"uint8"},{"internalType":"address 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