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Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
This contract has been partially verified via Sourcify.
View contract in Sourcify repository
- Contract name:
- ProxyCreationAndExecute
- Optimization enabled
- true
- Compiler version
- v0.4.21+commit.dfe3193c
- Optimization runs
- 200
- EVM Version
- byzantium
- Verified at
- 2026-04-22T09:53:08.787702Z
Constructor Arguments
000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
Arg [0] (address) : 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
ProxyCreationAndExecute.sol
pragma solidity ^0.4.16;
contract DSMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x);
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x);
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x);
}
function min(uint x, uint y) internal pure returns (uint z) {
return x <= y ? x : y;
}
function max(uint x, uint y) internal pure returns (uint z) {
return x >= y ? x : y;
}
function imin(int x, int y) internal pure returns (int z) {
return x <= y ? x : y;
}
function imax(int x, int y) internal pure returns (int z) {
return x >= y ? x : y;
}
uint constant WAD = 10 ** 18;
uint constant RAY = 10 ** 27;
function wmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), WAD / 2) / WAD;
}
function rmul(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, y), RAY / 2) / RAY;
}
function wdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, WAD), y / 2) / y;
}
function rdiv(uint x, uint y) internal pure returns (uint z) {
z = add(mul(x, RAY), y / 2) / y;
}
// This famous algorithm is called "exponentiation by squaring"
// and calculates x^n with x as fixed-point and n as regular unsigned.
//
// It's O(log n), instead of O(n) for naive repeated multiplication.
//
// These facts are why it works:
//
// If n is even, then x^n = (x^2)^(n/2).
// If n is odd, then x^n = x * x^(n-1),
// and applying the equation for even x gives
// x^n = x * (x^2)^((n-1) / 2).
//
// Also, EVM division is flooring and
// floor[(n-1) / 2] = floor[n / 2].
//
function rpow(uint x, uint n) internal pure returns (uint z) {
z = n % 2 != 0 ? x : RAY;
for (n /= 2; n != 0; n /= 2) {
x = rmul(x, x);
if (n % 2 != 0) {
z = rmul(z, x);
}
}
}
}
contract OtcInterface {
function sellAllAmount(address, uint, address, uint) public returns (uint);
function buyAllAmount(address, uint, address, uint) public returns (uint);
function getPayAmount(address, address, uint) public constant returns (uint);
}
contract TokenInterface {
function balanceOf(address) public returns (uint);
function allowance(address, address) public returns (uint);
function approve(address, uint) public;
function transfer(address,uint) public returns (bool);
function transferFrom(address, address, uint) public returns (bool);
function deposit() public payable;
function withdraw(uint) public;
}
contract OasisDirectProxy is DSMath {
function withdrawAndSend(TokenInterface wethToken, uint wethAmt) internal {
wethToken.withdraw(wethAmt);
require(msg.sender.call.value(wethAmt)());
}
function sellAllAmount(OtcInterface otc, TokenInterface payToken, uint payAmt, TokenInterface buyToken, uint minBuyAmt) public returns (uint buyAmt) {
require(payToken.transferFrom(msg.sender, this, payAmt));
if (payToken.allowance(this, otc) < payAmt) {
payToken.approve(otc, uint(-1));
}
buyAmt = otc.sellAllAmount(payToken, payAmt, buyToken, minBuyAmt);
require(buyToken.transfer(msg.sender, buyAmt));
}
function sellAllAmountPayEth(OtcInterface otc, TokenInterface wethToken, TokenInterface buyToken, uint minBuyAmt) public payable returns (uint buyAmt) {
wethToken.deposit.value(msg.value)();
if (wethToken.allowance(this, otc) < msg.value) {
wethToken.approve(otc, uint(-1));
}
buyAmt = otc.sellAllAmount(wethToken, msg.value, buyToken, minBuyAmt);
require(buyToken.transfer(msg.sender, buyAmt));
}
function sellAllAmountBuyEth(OtcInterface otc, TokenInterface payToken, uint payAmt, TokenInterface wethToken, uint minBuyAmt) public returns (uint wethAmt) {
require(payToken.transferFrom(msg.sender, this, payAmt));
if (payToken.allowance(this, otc) < payAmt) {
payToken.approve(otc, uint(-1));
}
wethAmt = otc.sellAllAmount(payToken, payAmt, wethToken, minBuyAmt);
withdrawAndSend(wethToken, wethAmt);
}
function buyAllAmount(OtcInterface otc, TokenInterface buyToken, uint buyAmt, TokenInterface payToken, uint maxPayAmt) public returns (uint payAmt) {
uint payAmtNow = otc.getPayAmount(payToken, buyToken, buyAmt);
require(payAmtNow <= maxPayAmt);
require(payToken.transferFrom(msg.sender, this, payAmtNow));
if (payToken.allowance(this, otc) < payAmtNow) {
payToken.approve(otc, uint(-1));
}
payAmt = otc.buyAllAmount(buyToken, buyAmt, payToken, payAmtNow);
require(buyToken.transfer(msg.sender, min(buyAmt, buyToken.balanceOf(this)))); // To avoid rounding issues we check the minimum value
}
function buyAllAmountPayEth(OtcInterface otc, TokenInterface buyToken, uint buyAmt, TokenInterface wethToken) public payable returns (uint wethAmt) {
// In this case user needs to send more ETH than a estimated value, then contract will send back the rest
wethToken.deposit.value(msg.value)();
if (wethToken.allowance(this, otc) < msg.value) {
wethToken.approve(otc, uint(-1));
}
wethAmt = otc.buyAllAmount(buyToken, buyAmt, wethToken, msg.value);
require(buyToken.transfer(msg.sender, min(buyAmt, buyToken.balanceOf(this)))); // To avoid rounding issues we check the minimum value
withdrawAndSend(wethToken, sub(msg.value, wethAmt));
}
function buyAllAmountBuyEth(OtcInterface otc, TokenInterface wethToken, uint wethAmt, TokenInterface payToken, uint maxPayAmt) public returns (uint payAmt) {
uint payAmtNow = otc.getPayAmount(payToken, wethToken, wethAmt);
require(payAmtNow <= maxPayAmt);
require(payToken.transferFrom(msg.sender, this, payAmtNow));
if (payToken.allowance(this, otc) < payAmtNow) {
payToken.approve(otc, uint(-1));
}
payAmt = otc.buyAllAmount(wethToken, wethAmt, payToken, payAmtNow);
withdrawAndSend(wethToken, wethAmt);
}
function() public payable {}
}
contract DSAuthority {
function canCall(
address src, address dst, bytes4 sig
) public view returns (bool);
}
contract DSAuthEvents {
event LogSetAuthority (address indexed authority);
event LogSetOwner (address indexed owner);
}
contract DSAuth is DSAuthEvents {
DSAuthority public authority;
address public owner;
function DSAuth() public {
owner = msg.sender;
LogSetOwner(msg.sender);
}
function setOwner(address owner_)
public
auth
{
owner = owner_;
LogSetOwner(owner);
}
function setAuthority(DSAuthority authority_)
public
auth
{
authority = authority_;
LogSetAuthority(authority);
}
modifier auth {
require(isAuthorized(msg.sender, msg.sig));
_;
}
function isAuthorized(address src, bytes4 sig) internal view returns (bool) {
if (src == address(this)) {
return true;
} else if (src == owner) {
return true;
} else if (authority == DSAuthority(0)) {
return false;
} else {
return authority.canCall(src, this, sig);
}
}
}
contract DSNote {
event LogNote(
bytes4 indexed sig,
address indexed guy,
bytes32 indexed foo,
bytes32 indexed bar,
uint wad,
bytes fax
) anonymous;
modifier note {
bytes32 foo;
bytes32 bar;
assembly {
foo := calldataload(4)
bar := calldataload(36)
}
LogNote(msg.sig, msg.sender, foo, bar, msg.value, msg.data);
_;
}
}
// DSProxy
// Allows code execution using a persistant identity This can be very
// useful to execute a sequence of atomic actions. Since the owner of
// the proxy can be changed, this allows for dynamic ownership models
// i.e. a multisig
contract DSProxy is DSAuth, DSNote {
DSProxyCache public cache; // global cache for contracts
function DSProxy(address _cacheAddr) public {
require(setCache(_cacheAddr));
}
function() public payable {
}
// use the proxy to execute calldata _data on contract _code
function execute(bytes _code, bytes _data)
public
payable
returns (address target, bytes32 response)
{
target = cache.read(_code);
if (target == 0x0) {
// deploy contract & store its address in cache
target = cache.write(_code);
}
response = execute(target, _data);
}
function execute(address _target, bytes _data)
public
auth
note
payable
returns (bytes32 response)
{
require(_target != 0x0);
// call contract in current context
assembly {
let succeeded := delegatecall(sub(gas, 5000), _target, add(_data, 0x20), mload(_data), 0, 32)
response := mload(0) // load delegatecall output
switch iszero(succeeded)
case 1 {
// throw if delegatecall failed
revert(0, 0)
}
}
}
//set new cache
function setCache(address _cacheAddr)
public
auth
note
returns (bool)
{
require(_cacheAddr != 0x0); // invalid cache address
cache = DSProxyCache(_cacheAddr); // overwrite cache
return true;
}
}
// DSProxyFactory
// This factory deploys new proxy instances through build()
// Deployed proxy addresses are logged
contract DSProxyFactory {
event Created(address indexed sender, address proxy, address cache);
mapping(address=>bool) public isProxy;
DSProxyCache public cache = new DSProxyCache();
// deploys a new proxy instance
// sets owner of proxy to caller
function build() public returns (DSProxy proxy) {
proxy = build(msg.sender);
}
// deploys a new proxy instance
// sets custom owner of proxy
function build(address owner) public returns (DSProxy proxy) {
proxy = new DSProxy(cache);
Created(owner, address(proxy), address(cache));
proxy.setOwner(owner);
isProxy[proxy] = true;
}
}
// DSProxyCache
// This global cache stores addresses of contracts previously deployed
// by a proxy. This saves gas from repeat deployment of the same
// contracts and eliminates blockchain bloat.
// By default, all proxies deployed from the same factory store
// contracts in the same cache. The cache a proxy instance uses can be
// changed. The cache uses the sha3 hash of a contract's bytecode to
// lookup the address
contract DSProxyCache {
mapping(bytes32 => address) cache;
function read(bytes _code) public view returns (address) {
bytes32 hash = keccak256(_code);
return cache[hash];
}
function write(bytes _code) public returns (address target) {
assembly {
target := create(0, add(_code, 0x20), mload(_code))
switch iszero(extcodesize(target))
case 1 {
// throw if contract failed to deploy
revert(0, 0)
}
}
bytes32 hash = keccak256(_code);
cache[hash] = target;
}
}
contract ProxyCreationAndExecute is OasisDirectProxy {
TokenInterface wethToken;
function ProxyCreationAndExecute(address wethToken_) {
wethToken = TokenInterface(wethToken_);
}
function createAndSellAllAmount(DSProxyFactory factory, OtcInterface otc, TokenInterface payToken, uint payAmt, TokenInterface buyToken, uint minBuyAmt) public returns (DSProxy proxy, uint buyAmt) {
proxy = factory.build(msg.sender);
buyAmt = sellAllAmount(otc, payToken, payAmt, buyToken, minBuyAmt);
}
function createAndSellAllAmountPayEth(DSProxyFactory factory, OtcInterface otc, TokenInterface buyToken, uint minBuyAmt) public payable returns (DSProxy proxy, uint buyAmt) {
proxy = factory.build(msg.sender);
buyAmt = sellAllAmountPayEth(otc, wethToken, buyToken, minBuyAmt);
}
function createAndSellAllAmountBuyEth(DSProxyFactory factory, OtcInterface otc, TokenInterface payToken, uint payAmt, uint minBuyAmt) public returns (DSProxy proxy, uint wethAmt) {
proxy = factory.build(msg.sender);
wethAmt = sellAllAmountBuyEth(otc, payToken, payAmt, wethToken, minBuyAmt);
}
function createAndBuyAllAmount(DSProxyFactory factory, OtcInterface otc, TokenInterface buyToken, uint buyAmt, TokenInterface payToken, uint maxPayAmt) public returns (DSProxy proxy, uint payAmt) {
proxy = factory.build(msg.sender);
payAmt = buyAllAmount(otc, buyToken, buyAmt, payToken, maxPayAmt);
}
function createAndBuyAllAmountPayEth(DSProxyFactory factory, OtcInterface otc, TokenInterface buyToken, uint buyAmt) public payable returns (DSProxy proxy, uint wethAmt) {
proxy = factory.build(msg.sender);
wethAmt = buyAllAmountPayEth(otc, buyToken, buyAmt, wethToken);
}
function createAndBuyAllAmountBuyEth(DSProxyFactory factory, OtcInterface otc, uint wethAmt, TokenInterface payToken, uint maxPayAmt) public returns (DSProxy proxy, uint payAmt) {
proxy = factory.build(msg.sender);
payAmt = buyAllAmountBuyEth(otc, wethToken, wethAmt, payToken, maxPayAmt);
}
function() public payable {
require(msg.sender == address(wethToken));
}
}
Compiler Settings
{"remappings":[],"optimizer":{"runs":200,"enabled":true},"libraries":{},"evmVersion":"byzantium","compilationTarget":{"ProxyCreationAndExecute.sol":"ProxyCreationAndExecute"}}
Contract ABI
[{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"wethAmt"}],"name":"sellAllAmountBuyEth","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"payToken"},{"type":"uint256","name":"payAmt"},{"type":"address","name":"wethToken"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"buyAmt"}],"name":"sellAllAmount","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"payToken"},{"type":"uint256","name":"payAmt"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"payAmt"}],"name":"buyAllAmount","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"buyAmt"},{"type":"address","name":"payToken"},{"type":"uint256","name":"maxPayAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"payAmt"}],"name":"createAndBuyAllAmountBuyEth","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"uint256","name":"wethAmt"},{"type":"address","name":"payToken"},{"type":"uint256","name":"maxPayAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"wethAmt"}],"name":"createAndSellAllAmountBuyEth","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"address","name":"payToken"},{"type":"uint256","name":"payAmt"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"wethAmt"}],"name":"createAndBuyAllAmountPayEth","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"buyAmt"}],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"buyAmt"}],"name":"createAndSellAllAmountPayEth","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"payAmt"}],"name":"createAndBuyAllAmount","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"buyAmt"},{"type":"address","name":"payToken"},{"type":"uint256","name":"maxPayAmt"}],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[{"type":"uint256","name":"wethAmt"}],"name":"buyAllAmountPayEth","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"buyAmt"},{"type":"address","name":"wethToken"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"address","name":"proxy"},{"type":"uint256","name":"buyAmt"}],"name":"createAndSellAllAmount","inputs":[{"type":"address","name":"factory"},{"type":"address","name":"otc"},{"type":"address","name":"payToken"},{"type":"uint256","name":"payAmt"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"payable","payable":true,"outputs":[{"type":"uint256","name":"buyAmt"}],"name":"sellAllAmountPayEth","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"wethToken"},{"type":"address","name":"buyToken"},{"type":"uint256","name":"minBuyAmt"}],"constant":false},{"type":"function","stateMutability":"nonpayable","payable":false,"outputs":[{"type":"uint256","name":"payAmt"}],"name":"buyAllAmountBuyEth","inputs":[{"type":"address","name":"otc"},{"type":"address","name":"wethToken"},{"type":"uint256","name":"wethAmt"},{"type":"address","name":"payToken"},{"type":"uint256","name":"maxPayAmt"}],"constant":false},{"type":"constructor","stateMutability":"nonpayable","payable":false,"inputs":[{"type":"address","name":"wethToken_"}]},{"type":"fallback","stateMutability":"payable","payable":true}]
Contract Creation Code
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