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jeffywu/DeployAndMigrate.py

Last active June 30, 2021 14:00
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NotionalV1 to Compound
Raw
DeployAndMigrate.py
import os
import json
from brownie import (
accounts,
NotionalV1ToCompound,
nTransparentUpgradeableProxy
)
from brownie.network import web3
from brownie.network.contract import Contract
def main():
deployer = accounts.add(private_key=os.environ["TESTNET_PRIVATE_KEY"])
with open("kovan.json", "r") as f:
addresses = json.load(f)
with open("./ERC1155Trade.json", "r") as f:
ERC1155Artifact = json.load(f)
with open("./ERC20.json", "r") as f:
ERC20 = json.load(f)
v1ToComp = NotionalV1ToCompound.deploy(
addresses["escrow"],
addresses["erc1155trade"],
addresses["wETHwBTCUniswapV2"],
addresses["WETH"],
addresses["WBTC"],
addresses["comptroller"],
addresses["cETH"],
addresses["cDAI"],
addresses["cUSDC"],
addresses["cWBTC"],
{"from": deployer}
)
initializeData = web3.eth.contract(abi=NotionalV1ToCompound.abi).encodeABI(
fn_name="initialize", args=[]
)
proxy = nTransparentUpgradeableProxy.deploy(
v1ToComp.address,
addresses["proxyAdmin"], # Set your own proxy admin here...
initializeData, # Deployer is set to owner
{"from": deployer},
)
migrator = Contract.from_abi(
"Notional", proxy.address, abi=NotionalV1ToCompound.abi, owner=deployer
)
erc1155 = Contract.from_abi(
"ERC1155Trade", address=addresses["erc1155trade"], abi=ERC1155Artifact['abi']
)
usdc = Contract.from_abi(
"USDC", address=addresses["USDC"], abi=ERC20
)
erc1155.setApprovalForAll(migrator.address, True, {"from": deployer})
usdc.approve(addresses["escrow"], 2 ** 255, {"from": deployer})
# Get this value from etherscan
v1RepayAmount = 1023298128
migrator.migrateUSDCEther(v1RepayAmount, {'from': deployer})
Raw
ERC1155Trade.json
{
"contractName": "ERC1155Trade",
"abi": [
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "_owner",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_operator",
"type": "address"
},
{
"indexed": false,
"internalType": "bool",
"name": "_approved",
"type": "bool"
}
],
"name": "ApprovalForAll",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "account",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "operator",
"type": "address"
}
],
"name": "BatchOperation",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "previousOwner",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "newOwner",
"type": "address"
}
],
"name": "OwnershipTransferred",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "_operator",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_from",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_to",
"type": "address"
},
{
"indexed": false,
"internalType": "uint256[]",
"name": "_ids",
"type": "uint256[]"
},
{
"indexed": false,
"internalType": "uint256[]",
"name": "_values",
"type": "uint256[]"
}
],
"name": "TransferBatch",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": true,
"internalType": "address",
"name": "_operator",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_from",
"type": "address"
},
{
"indexed": true,
"internalType": "address",
"name": "_to",
"type": "address"
},
{
"indexed": false,
"internalType": "uint256",
"name": "_id",
"type": "uint256"
},
{
"indexed": false,
"internalType": "uint256",
"name": "_value",
"type": "uint256"
}
],
"name": "TransferSingle",
"type": "event"
},
{
"anonymous": false,
"inputs": [
{
"indexed": false,
"internalType": "string",
"name": "_value",
"type": "string"
},
{
"indexed": true,
"internalType": "uint256",
"name": "_id",
"type": "uint256"
}
],
"name": "URI",
"type": "event"
},
{
"inputs": [],
"name": "BRIDGE_PROXY",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "DIRECTORY",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "account",
"type": "address"
},
{
"internalType": "uint256",
"name": "id",
"type": "uint256"
}
],
"name": "balanceOf",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address[]",
"name": "accounts",
"type": "address[]"
},
{
"internalType": "uint256[]",
"name": "ids",
"type": "uint256[]"
}
],
"name": "balanceOfBatch",
"outputs": [
{
"internalType": "uint256[]",
"name": "",
"type": "uint256[]"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "account",
"type": "address"
},
{
"internalType": "uint32",
"name": "maxTime",
"type": "uint32"
},
{
"components": [
{
"internalType": "uint16",
"name": "currencyId",
"type": "uint16"
},
{
"internalType": "uint128",
"name": "amount",
"type": "uint128"
}
],
"internalType": "struct Common.Deposit[]",
"name": "deposits",
"type": "tuple[]"
},
{
"components": [
{
"internalType": "enum Common.TradeType",
"name": "tradeType",
"type": "uint8"
},
{
"internalType": "uint8",
"name": "cashGroup",
"type": "uint8"
},
{
"internalType": "uint32",
"name": "maturity",
"type": "uint32"
},
{
"internalType": "uint128",
"name": "amount",
"type": "uint128"
},
{
"internalType": "bytes",
"name": "slippageData",
"type": "bytes"
}
],
"internalType": "struct Common.Trade[]",
"name": "trades",
"type": "tuple[]"
}
],
"name": "batchOperation",
"outputs": [],
"stateMutability": "payable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "account",
"type": "address"
},
{
"internalType": "uint32",
"name": "maxTime",
"type": "uint32"
},
{
"components": [
{
"internalType": "uint16",
"name": "currencyId",
"type": "uint16"
},
{
"internalType": "uint128",
"name": "amount",
"type": "uint128"
}
],
"internalType": "struct Common.Deposit[]",
"name": "deposits",
"type": "tuple[]"
},
{
"components": [
{
"internalType": "enum Common.TradeType",
"name": "tradeType",
"type": "uint8"
},
{
"internalType": "uint8",
"name": "cashGroup",
"type": "uint8"
},
{
"internalType": "uint32",
"name": "maturity",
"type": "uint32"
},
{
"internalType": "uint128",
"name": "amount",
"type": "uint128"
},
{
"internalType": "bytes",
"name": "slippageData",
"type": "bytes"
}
],
"internalType": "struct Common.Trade[]",
"name": "trades",
"type": "tuple[]"
},
{
"components": [
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint16",
"name": "currencyId",
"type": "uint16"
},
{
"internalType": "uint128",
"name": "amount",
"type": "uint128"
}
],
"internalType": "struct Common.Withdraw[]",
"name": "withdraws",
"type": "tuple[]"
}
],
"name": "batchOperationWithdraw",
"outputs": [],
"stateMutability": "payable",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint256",
"name": "id",
"type": "uint256"
}
],
"name": "decodeAssetId",
"outputs": [
{
"internalType": "uint8",
"name": "",
"type": "uint8"
},
{
"internalType": "uint16",
"name": "",
"type": "uint16"
},
{
"internalType": "uint32",
"name": "",
"type": "uint32"
},
{
"internalType": "bytes1",
"name": "",
"type": "bytes1"
}
],
"stateMutability": "pure",
"type": "function"
},
{
"inputs": [
{
"internalType": "uint8",
"name": "cashGroupId",
"type": "uint8"
},
{
"internalType": "uint16",
"name": "instrumentId",
"type": "uint16"
},
{
"internalType": "uint32",
"name": "maturity",
"type": "uint32"
},
{
"internalType": "bytes1",
"name": "assetType",
"type": "bytes1"
}
],
"name": "encodeAssetId",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "pure",
"type": "function"
},
{
"inputs": [
{
"components": [
{
"internalType": "uint8",
"name": "cashGroupId",
"type": "uint8"
},
{
"internalType": "uint16",
"name": "instrumentId",
"type": "uint16"
},
{
"internalType": "uint32",
"name": "maturity",
"type": "uint32"
},
{
"internalType": "bytes1",
"name": "assetType",
"type": "bytes1"
},
{
"internalType": "uint32",
"name": "rate",
"type": "uint32"
},
{
"internalType": "uint128",
"name": "notional",
"type": "uint128"
}
],
"internalType": "struct Common.Asset",
"name": "asset",
"type": "tuple"
}
],
"name": "encodeAssetId",
"outputs": [
{
"internalType": "uint256",
"name": "",
"type": "uint256"
}
],
"stateMutability": "pure",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "directory",
"type": "address"
},
{
"internalType": "address",
"name": "owner",
"type": "address"
}
],
"name": "initialize",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "owner",
"type": "address"
},
{
"internalType": "address",
"name": "operator",
"type": "address"
}
],
"name": "isApprovedForAll",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "isOwner",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "",
"type": "address"
},
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"name": "operators",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "owner",
"outputs": [
{
"internalType": "address",
"name": "",
"type": "address"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [],
"name": "renounceOwnership",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "",
"type": "address"
},
{
"internalType": "address",
"name": "",
"type": "address"
},
{
"internalType": "uint256[]",
"name": "",
"type": "uint256[]"
},
{
"internalType": "uint256[]",
"name": "",
"type": "uint256[]"
},
{
"internalType": "bytes",
"name": "",
"type": "bytes"
}
],
"name": "safeBatchTransferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "from",
"type": "address"
},
{
"internalType": "address",
"name": "to",
"type": "address"
},
{
"internalType": "uint256",
"name": "id",
"type": "uint256"
},
{
"internalType": "uint256",
"name": "value",
"type": "uint256"
},
{
"internalType": "bytes",
"name": "data",
"type": "bytes"
}
],
"name": "safeTransferFrom",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "operator",
"type": "address"
},
{
"internalType": "bool",
"name": "approved",
"type": "bool"
}
],
"name": "setApprovalForAll",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "bridgeProxy",
"type": "address"
}
],
"name": "setBridgeProxy",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "enum Governed.CoreContracts",
"name": "name",
"type": "uint8"
},
{
"internalType": "address",
"name": "contractAddress",
"type": "address"
}
],
"name": "setContract",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
},
{
"inputs": [
{
"internalType": "bytes4",
"name": "interfaceId",
"type": "bytes4"
}
],
"name": "supportsInterface",
"outputs": [
{
"internalType": "bool",
"name": "",
"type": "bool"
}
],
"stateMutability": "view",
"type": "function"
},
{
"inputs": [
{
"internalType": "address",
"name": "newOwner",
"type": "address"
}
],
"name": "transferOwnership",
"outputs": [],
"stateMutability": "nonpayable",
"type": "function"
}
],
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"linkReferences": {},
"deployedLinkReferences": {}
}
Raw
ERC20.json
[{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]
Raw
kovan.json
{
"DAI": "0x181D62Ff8C0aEeD5Bc2Bf77A88C07235c4cc6905",
"USDC": "0xF503D5cd87d10Ce8172F9e77f76ADE8109037b4c",
"WBTC": "0x45a8451ceaae5976b4ae5f14a7ad789fae8e9971",
"WETH": "0xd0a1e359811322d97991e03f863a0c30c2cf029c",
"cDAI": "0x4dC87A3D30C4A1B33E4349f02F4c5B1B1eF9A75D",
"cETH": "0x40575f9Eb401f63f66F4c434248ad83D3441bf61",
"cUSDC": "0xf17C5c7240CBc83D3186A9d6935F003e451C5cDd",
"cWBTC": "0xA8E51e20985E926dE882EE700eC7F7d51D89D130",
"cashMarketLogic": "0x346944E951038Db475F347849Ad6e3967181E3F2",
"chainId": 42,
"compAdmin": "0x010c90d15D62E5F07a3AF28EbB99DEaaaD645f97",
"compPriceOracle": "0x9D13E1A715149abcF12fD538C1Cd48F2E8C6899C",
"comptroller": "0x2D5D30a561278a5F0ad8779A386dAA4C478865D0",
"directory": "0xdce848258dFB1bBf34C346Fbe40F10F8a42d2526",
"erc1155": "0x3a31b8121D810B1D7b3004f94f205E6DFC1bf8d9",
"erc1155trade": "0xBbA899578bd3fA3DAa863A340f5600797993eF08",
"escrow": "0x9abd0b8868546105F6F48298eaDC1D9c82f7f683",
"libraries": {
"Liquidation": "0xeD176679A42c5F0b3602c3Df705577b92646345a",
"RiskFramework": "0xc20846f8d295C354f9EcB48a695d41D785C35e07"
},
"networkName": "kovan",
"portfolios": "0x0A4721117040ABF319b954aBF13F654505C34920",
"proxyAdmin": "0x25d27646Ea585Ee7Ef308d14f4C0D2b094790Acb",
"proxyFactory": "0xc981D9E52684A25e528ba63552dF122Af8327D4E",
"startBlock": 21065054,
"wETHwBTCUniswapV2": "0x1D925AA3d6fEf028FB607d5E8250C1A5AC8E0D99"
}
Raw
NotionalV1ToCompound.sol
// SPDX-License-Identifier: GPL-3.0-only
pragma solidity >0.7.0;
pragma experimental ABIEncoderV2;
// WARNING: this is unaudited code. Use at your own risk. Very much recommended that this
// should be deployed behind an upgradeable proxy in case of issues.
// WARNING: Compound borrow will be credited to this contract and therefore this contract must hold your cTokens, not
// your wallet. This increases the risk of your collateral becoming locked or lost. PROCEED WITH CAUTION.
// Uses this release of OZ contracts: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.4-solc-0.7
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
interface WETH9 {
function withdraw(uint256 wad) external;
function transfer(address dst, uint256 wad) external returns (bool);
}
interface IEscrow {
function getBalances(address account) external view returns (int256[] memory);
function currencyIdToAddress(uint16 currencyId) external view returns (address);
}
interface UniswapPair {
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
}
interface INotionalV1Erc1155 {
/** Notional V1 Types */
struct Deposit {
// Currency Id to deposit
uint16 currencyId;
// Amount of tokens to deposit
uint128 amount;
}
/**
* Used to describe withdraws in ERC1155.batchOperationWithdraw
*/
struct Withdraw {
// Destination of the address to withdraw to
address to;
// Currency Id to withdraw
uint16 currencyId;
// Amount of tokens to withdraw
uint128 amount;
}
enum TradeType {
TakeCurrentCash,
TakefCash,
AddLiquidity,
RemoveLiquidity
}
/**
* Used to describe a trade in ERC1155.batchOperation
*/
struct Trade {
TradeType tradeType;
uint8 cashGroup;
uint32 maturity;
uint128 amount;
bytes slippageData;
}
function batchOperationWithdraw(
address account,
uint32 maxTime,
Deposit[] memory deposits,
Trade[] memory trades,
Withdraw[] memory withdraws
) external payable;
}
interface CEtherInterface {
function mint() external payable;
function borrow(uint256 borrowAmount) external returns (uint256);
}
interface CErc20Interface {
function mint(uint256 mintAmount) external returns (uint256);
function borrow(uint256 borrowAmount) external returns (uint256);
}
interface ComptrollerInterface {
function enterMarkets(address[] calldata cTokens) external returns (uint256[] memory);
}
contract NotionalV1ToCompound {
address public owner;
IEscrow public immutable Escrow;
INotionalV1Erc1155 public immutable NotionalV1Erc1155;
UniswapPair public immutable wETHwBTCPair;
WETH9 public immutable WETH;
IERC20 public immutable WBTC;
address public immutable Comptroller;
address public immutable cETH;
address public immutable cDAI;
address public immutable cUSDC;
address public immutable cWBTC;
uint16 internal constant V1_ETH = 0;
uint16 internal constant V1_DAI = 1;
uint16 internal constant V1_USDC = 2;
uint16 internal constant V1_WBTC = 3;
function initialize() external {
owner = msg.sender;
}
/// @dev Throws if called by any account other than the owner.
modifier onlyOwner() {
require(owner == msg.sender, "Ownable: caller is not the owner");
_;
}
/// @dev Transfers ownership of the contract to a new account (`newOwner`).
/// Can only be called by the current owner.
function transferOwnership(address newOwner) external onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
owner = newOwner;
}
constructor(
IEscrow escrow_,
INotionalV1Erc1155 erc1155_,
UniswapPair wETHwBTCPair_,
WETH9 weth_,
IERC20 wbtc_,
address comptroller_,
address cETH_,
address cDAI_,
address cUSDC_,
address cWBTC_
) {
Escrow = escrow_;
NotionalV1Erc1155 = erc1155_;
Comptroller = comptroller_;
wETHwBTCPair = wETHwBTCPair_;
WETH = weth_;
WBTC = wbtc_;
cETH = cETH_;
cDAI = cDAI_;
cUSDC = cUSDC_;
cWBTC = cWBTC_;
}
function migrateDaiEther(uint128 v1RepayAmount) external onlyOwner {
_flashBorrowCollateral(V1_DAI, cDAI, V1_ETH, cETH, v1RepayAmount);
}
function migrateUSDCEther(uint128 v1RepayAmount) external onlyOwner {
_flashBorrowCollateral(V1_USDC, cUSDC, V1_ETH, cETH, v1RepayAmount);
}
function migrateDaiWBTC(uint128 v1RepayAmount) external onlyOwner {
_flashBorrowCollateral(V1_DAI, cDAI, V1_WBTC, cWBTC, v1RepayAmount);
}
function migrateUSDCWBTC(uint128 v1RepayAmount) external onlyOwner {
_flashBorrowCollateral(V1_USDC, cUSDC, V1_WBTC, cWBTC, v1RepayAmount);
}
/** Use this to approve a spender for the cToken allowance */
function approveAllowance(
address token,
address spender,
uint256 allowance
) external onlyOwner {
IERC20(token).approve(spender, allowance);
}
function _flashBorrowCollateral(
uint16 v1DebtCurrencyId,
address cTokenBorrowAddress,
uint16 v1CollateralId,
address cTokenCollateralAddress,
uint128 v1RepayAmount
) internal returns (uint256) {
int256[] memory balances = Escrow.getBalances(msg.sender);
int256 collateralBalance = (
v1CollateralId == V1_ETH ? balances[V1_ETH] : balances[V1_WBTC]
);
require(collateralBalance > 0);
bytes memory encodedData = abi.encode(
msg.sender,
v1DebtCurrencyId,
cTokenBorrowAddress,
v1CollateralId,
cTokenCollateralAddress,
v1RepayAmount,
uint256(collateralBalance)
);
uint256 swapAmount = (uint256(collateralBalance) * 996) / 1000;
if (v1CollateralId == V1_WBTC) {
wETHwBTCPair.swap(swapAmount, 0, address(this), encodedData);
} else if (v1CollateralId == V1_ETH) {
wETHwBTCPair.swap(0, swapAmount, address(this), encodedData);
}
}
function _repayFlashBorrow(uint256 v1CollateralId, uint256 amount) internal {
bool success;
if (v1CollateralId == V1_ETH) {
success = WETH.transfer(msg.sender, amount);
} else if (v1CollateralId == V1_WBTC) {
success = WBTC.transfer(msg.sender, amount);
}
require(success);
}
function uniswapV2Call(
address sender,
uint256 amount0,
uint256 amount1,
bytes calldata data
) external {
// Flash swap call must come from this contract
require(sender == address(this), "sender mismatch");
// decode message
(
address migrator,
uint16 v1DebtCurrencyId,
address cTokenBorrowAddress,
uint16 v1CollateralId,
address cTokenCollateral,
uint128 v1RepayAmount,
uint256 collateralAmount
) = abi.decode(data, (address, uint16, address, uint16, address, uint128, uint256));
// transfer tokens to original caller
uint256 swapAmount;
if (v1CollateralId == V1_WBTC) {
swapAmount = amount0;
} else if (v1CollateralId == V1_ETH) {
swapAmount = amount1;
WETH.withdraw(amount1);
}
_migrate(
migrator,
v1DebtCurrencyId,
cTokenBorrowAddress,
v1CollateralId,
cTokenCollateral,
v1RepayAmount,
collateralAmount,
swapAmount
);
_repayFlashBorrow(v1CollateralId, collateralAmount);
}
function _migrate(
address migrator,
uint16 v1DebtCurrencyId,
address cTokenBorrowAddress,
uint16 v1CollateralId,
address cTokenCollateralAddress,
uint128 v1RepayAmount,
uint256 collateralAmount,
uint256 swapAmount
) internal {
// Mints cToken collateral from underlying that was flash borrowed
if (cTokenCollateralAddress == address(cETH)) {
CEtherInterface(cTokenCollateralAddress).mint{value: swapAmount}();
} else {
CErc20Interface(cTokenCollateralAddress).mint(swapAmount);
}
address[] memory markets = new address[](2);
markets[0] = cTokenCollateralAddress;
markets[1] = cTokenBorrowAddress;
uint256[] memory returnCodes = ComptrollerInterface(Comptroller).enterMarkets(markets);
require(returnCodes[0] == 0 && returnCodes[1] == 0, "Enter markets failed");
// Borrows v1RepayAmount from Compound and will be sent to this contract's address
// Debt will be credited to this contract address.
CErc20Interface(cTokenBorrowAddress).borrow(v1RepayAmount);
address debtCurrencyAddress = Escrow.currencyIdToAddress(v1DebtCurrencyId);
// Transfer the borrowed assets to the migrator to repay the loan on Notional V1
IERC20(debtCurrencyAddress).transfer(migrator, v1RepayAmount);
{
INotionalV1Erc1155.Deposit[] memory deposits = new INotionalV1Erc1155.Deposit[](1);
INotionalV1Erc1155.Trade[] memory trades = new INotionalV1Erc1155.Trade[](0);
INotionalV1Erc1155.Withdraw[] memory withdraws = new INotionalV1Erc1155.Withdraw[](1);
// This will deposit what we borrowed from Compound
deposits[0].currencyId = v1DebtCurrencyId;
deposits[0].amount = v1RepayAmount;
// This will withdraw to the current contract the collateral to repay the flash loan
withdraws[0].currencyId = v1CollateralId;
withdraws[0].to = address(this);
withdraws[0].amount = uint128(collateralAmount);
NotionalV1Erc1155.batchOperationWithdraw(
migrator,
uint32(block.timestamp),
deposits,
trades,
withdraws
);
}
}
receive() external payable {}
function onERC1155Received(
address _operator,
address _from,
uint256 _id,
uint256 _value,
bytes calldata _data
) external returns (bytes4) {
return 0xf23a6e61;
}
}
Raw
TestCase.py
def test_migrate_v1_to_comp(environment, accounts, NotionalV1ToCompound):
account = accounts[3]
(v1env, v2env) = environment
v1ToComp = NotionalV1ToCompound.deploy(
v1env["Escrow"].address,
v1env["ERC1155Trade"].address,
v1env["uniswapFactory"].getPair(v1env["WETH"].address, v2env.token["WBTC"]),
v1env["WETH"].address,
v2env.token["WBTC"],
v2env.comptroller.address,
v2env.cToken["ETH"],
v2env.cToken["DAI"],
v2env.cToken["USDC"],
v2env.cToken["WBTC"],
{"from": accounts[3]},
)
# USDC w/ ETH
erc1155 = Contract.from_abi(
"ERC1155Trade", address=v1env["ERC1155Trade"].address, abi=v1env["ERC1155Trade"].abi
)
erc1155.setApprovalForAll(v1ToComp.address, True, {"from": account})
v2env.token["USDC"].approve(v1env["Escrow"].address, 2 ** 255, {"from": account})
v1ToComp.migrateUSDCEther(100e6)
balances = v1env["Escrow"].functions.getBalances(account.address).call()
assert balances[0] == 0
assert balances[1] == 0
assert balances[2] == 100e6
assert balances[3] == 0
assert (v2env.cToken["USDC"].borrowBalanceCurrent(v1ToComp.address)).return_value > 0
with brownie.reverts():
v1ToComp.approveAllowance(v2env.cToken["ETH"], accounts[1], 100e8, {"from": accounts[1]})
v1ToComp.approveAllowance(v2env.cToken["ETH"], accounts[3], 2 ** 255, {"from": accounts[3]})
balanceBefore = v2env.cToken["ETH"].balanceOf(accounts[3])
v2env.cToken["ETH"].transferFrom(v1ToComp.address, accounts[3], 10, {"from": accounts[3]})
balanceAfter = v2env.cToken["ETH"].balanceOf(accounts[3])
assert balanceBefore + 10 == balanceAfter
# Cannot transfer if not approved
balanceBefore = v2env.cToken["ETH"].balanceOf(accounts[1])
# This does not revert outright...
v2env.cToken["ETH"].transferFrom(v1ToComp.address, accounts[1], 10, {"from": accounts[1]})
balanceAfter = v2env.cToken["ETH"].balanceOf(accounts[1])
assert balanceBefore == balanceAfter
# Assert we can repay and withdraw collateral
v2env.cToken["USDC"].repayBorrowBehalf(v1ToComp.address, 100e6, {"from": accounts[0]})
v2env.cToken["ETH"].transferFrom(
v1ToComp.address,
accounts[3],
v2env.cToken["ETH"].balanceOf(v1ToComp.address),
{"from": accounts[3]},
)
assert v2env.cToken["ETH"].balanceOf(v1ToComp.address) == 0
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