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withPermit.sol
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withPermit.sol
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/// dach.sol -- Dai automated clearing house
// Copyright (C) 2020 Martin Lundfall
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
pragma solidity >=0.5.12;
pragma experimental ABIEncoderV2;
interface DachLike {
function daiCheque(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external;
function daiSwap(address sender, uint amount, uint min_eth, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external returns (uint256);
function joinChai(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external;
function chaiCheque(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external;
function chaiSwap(address sender, uint amount, uint min_eth, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external returns (uint256);
function exitChai(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s) external;
}
interface DaiLike {
function permit(address, address, uint256, uint256, bool, uint8, bytes32, bytes32) external;
}
contract withPermit {
struct signedPermit {
address holder;
address spender;
uint256 nonce;
uint256 expiry;
bool allowed;
uint8 v;
bytes32 r;
bytes32 s;
}
DaiLike public constant dai = DaiLike(0x6B175474E89094C44Da98b954EedeAC495271d0F);
DaiLike public constant chai = DaiLike(0x06AF07097C9Eeb7fD685c692751D5C66dB49c215);
DachLike public constant dach = DachLike(0x64043a98f097fD6ef0D3ad41588a6B0424723b3a);
function daiCheque(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata daiPermit) external {
dai.permit(daiPermit.holder, daiPermit.spender, daiPermit.nonce, daiPermit.expiry,
daiPermit.allowed, daiPermit.v, daiPermit.r, daiPermit.s);
dach.daiCheque(sender, receiver, amount, fee, nonce, expiry, relayer, v, r, s);
}
function daiSwap(address sender, uint amount, uint min_eth, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata daiPermit) external returns (uint256) {
dai.permit(daiPermit.holder, daiPermit.spender, daiPermit.nonce, daiPermit.expiry,
daiPermit.allowed, daiPermit.v, daiPermit.r, daiPermit.s);
return dach.daiSwap(sender, amount, min_eth, fee, nonce, expiry, relayer, v, r, s);
}
function joinChai(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata daiPermit) external {
dai.permit(daiPermit.holder, daiPermit.spender, daiPermit.nonce, daiPermit.expiry,
daiPermit.allowed, daiPermit.v, daiPermit.r, daiPermit.s);
dach.joinChai(sender, receiver, amount, fee, nonce, expiry, relayer, v, r, s);
}
function chaiSwap(address sender, uint amount, uint min_eth, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata chaiPermit) external returns (uint256) {
chai.permit(chaiPermit.holder, chaiPermit.spender, chaiPermit.nonce, chaiPermit.expiry,
chaiPermit.allowed, chaiPermit.v, chaiPermit.r, chaiPermit.s);
return dach.chaiSwap(sender, amount, min_eth, fee, nonce, expiry, relayer, v, r, s);
}
function chaiCheque(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata chaiPermit) external {
chai.permit(chaiPermit.holder, chaiPermit.spender, chaiPermit.nonce, chaiPermit.expiry,
chaiPermit.allowed, chaiPermit.v, chaiPermit.r, chaiPermit.s);
dach.chaiCheque(sender, receiver, amount, fee, nonce, expiry, relayer, v, r, s);
}
function exitChai(address sender, address receiver, uint amount, uint fee, uint nonce,
uint expiry, address relayer, uint8 v, bytes32 r, bytes32 s,
signedPermit calldata chaiPermit) external {
chai.permit(chaiPermit.holder, chaiPermit.spender, chaiPermit.nonce, chaiPermit.expiry,
chaiPermit.allowed, chaiPermit.v, chaiPermit.r, chaiPermit.s);
dach.exitChai(sender, receiver, amount, fee, nonce, expiry, relayer, v, r, s);
}
}