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basic contract setup
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contracts/mainnet/connectors/euler-import/helpers.sol
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160
contracts/mainnet/connectors/euler-import/helpers.sol
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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pragma experimental ABIEncoderV2;
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import { TokenInterface, AccountInterface } from "../../common/interfaces.sol";
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import { Basic } from "../../common/basic.sol";
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import "./interface.sol";
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contract EulerHelpers is Basic {
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IEulerMarkets internal constant markets =
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IEulerMarkets(0x3520d5a913427E6F0D6A83E07ccD4A4da316e4d3);
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IEulerExecute internal constant eulerExec = IEulerExecute(0x59828FdF7ee634AaaD3f58B19fDBa3b03E2D9d80);
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function getSubAccountAddress(address primary, uint256 subAccountId)
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public
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pure
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returns (address)
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{
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require(subAccountId < 256, "sub-account-id-too-big");
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return address(uint160(primary) ^ uint160(subAccountId));
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}
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struct ImportInputData {
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address[] supplyTokens;
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address[] borrowTokens;
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}
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struct ImportData {
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address[] _supplyTokens;
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address[] _borrowTokens;
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EulerTokenInterface[] eTokens;
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EulerTokenInterface[] dTokens;
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uint256[] supplyAmts;
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uint256[] borrowAmts;
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}
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function getSupplyAmounts(
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address userAccount,
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ImportInputData memory inputData,
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ImportData memory data
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) internal view returns (ImportData memory) {
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data.supplyAmts = new uint256[](inputData.supplyTokens.length);
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data._supplyTokens = new address[](inputData.supplyTokens.length);
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data.eTokens = new EulerTokenInterface[](inputData.supplyTokens.length);
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for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
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for (uint256 j = i; j < inputData.supplyTokens.length; j++) {
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if (j != i) {
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require(
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inputData.supplyTokens[i] != inputData.supplyTokens[j],
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"token-repeated"
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);
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}
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}
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}
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for (uint256 i = 0; i < inputData.supplyTokens.length; i++) {
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address _token = inputData.supplyTokens[i] == ethAddr
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? wethAddr
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: inputData.supplyTokens[i];
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data._supplyTokens[i] = _token;
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data.eTokens[i] = EulerTokenInterface(markets.underlyingToEToken(_token));
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data.supplyAmts[i] = data.eTokens[i].balanceOf(userAccount);
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}
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return data;
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}
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function getBorrowAmounts(
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address userAccount,//user's EOA sub-account address
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ImportInputData memory inputData,
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ImportData memory data
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) internal view returns (ImportData memory) {
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if (inputData.borrowTokens.length > 0) {
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data._borrowTokens = new address[](inputData.borrowTokens.length);
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data.borrowAmts = new uint256[](
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inputData.borrowTokens.length
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);
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for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
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for (uint256 j = i; j < inputData.borrowTokens.length; j++) {
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if (j != i) {
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require(
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inputData.borrowTokens[i] !=
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inputData.borrowTokens[j],
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"token-repeated"
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);
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}
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}
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}
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for (uint256 i = 0; i < inputData.borrowTokens.length; i++) {
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address _token = inputData.borrowTokens[i] == ethAddr
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? wethAddr
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: inputData.borrowTokens[i];
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data._borrowTokens[i] = _token;
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data.dTokens[i] = EulerTokenInterface(markets.underlyingToDToken(_token));
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data.borrowAmts[i] = data.dTokens[i].balanceOf(userAccount);
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}
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}
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return data;
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}
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//transfer and enter market
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function _TransferEtokens(
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uint256 _length,
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EulerTokenInterface[] memory etokenContracts,
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uint256[] memory amts,
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address[] memory tokens,
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bool[] memory enterMarket,
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address userAccountFrom,
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address userAccountTo,
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uint targetId
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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uint256 _amt = amts[i];
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require(
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etokenContracts[i].transferFrom(
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userAccountFrom,
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userAccountTo,
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_amt
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),
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"allowance?"//change
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);
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if (enterMarket[i]) {
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markets.enterMarket(targetId, tokens[i]);
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} else {
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markets.exitMarket(targetId, tokens[i]);
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}
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}
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}
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}
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function _TransferDtokens(
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uint256 _length,
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EulerTokenInterface[] memory dtokenContracts,
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uint256[] memory amts,
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address[] memory tokens,
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address eoaIdFrom,
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address dsaIdTo
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) internal {
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for (uint256 i = 0; i < _length; i++) {
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if (amts[i] > 0) {
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uint256 _amt = amts[i];
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require(
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dtokenContracts[i].transferFrom(
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eoaIdFrom,
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dsaIdTo,
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_amt
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),
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"debt-transfer-failed?"
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);
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}
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}
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}
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}
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55
contracts/mainnet/connectors/euler-import/interface.sol
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55
contracts/mainnet/connectors/euler-import/interface.sol
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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pragma experimental ABIEncoderV2;
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interface EulerTokenInterface {
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function balanceOf(address _user) external view returns (uint256);
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function transferFrom(
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address,
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address,
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uint256
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) external returns (bool);
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function allowance(address, address) external returns (uint256);
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}
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interface IEulerMarkets {
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function enterMarket(uint256 subAccountId, address newMarket) external;
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function getEnteredMarkets(address account)
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external
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view
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returns (address[] memory);
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function exitMarket(uint256 subAccountId, address oldMarket) external;
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function underlyingToEToken(address underlying)
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external
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view
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returns (address);
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function underlyingToDToken(address underlying)
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external
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view
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returns (address);
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}
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interface IEulerExecute {
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struct EulerBatchItem {
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bool allowError;
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address proxyAddr;
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bytes data;
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}
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struct EulerBatchItemResponse {
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bool success;
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bytes result;
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}
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function batchDispatch(EulerBatchItem[] calldata items, address[] calldata deferLiquidityChecks) external returns (EulerBatchItemResponse[] memory);
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function deferLiquidityCheck(address account, bytes memory data) external;
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}
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64
contracts/mainnet/connectors/euler-import/main.sol
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64
contracts/mainnet/connectors/euler-import/main.sol
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//SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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pragma experimental ABIEncoderV2;
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import "./helpers.sol";
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contract EulerImport is EulerHelpers {
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function importEuler(
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address userAccount,//EOA address
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uint256 sourceId,
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uint256 targetId,
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bool[] memory enterMarket,
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ImportInputData memory inputData
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)
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external
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payable
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{
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_importEuler(userAccount, sourceId, targetId, inputData, enterMarket);
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}
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function _importEuler(
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address userAccount,//EOA address
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uint256 sourceId,
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uint256 targetId,
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ImportInputData memory inputData,
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bool[] memory enterMarket
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)
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internal
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{
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require(
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AccountInterface(address(this)).isAuth(userAccount),
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"user-account-not-auth"
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);
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require(inputData.supplyTokens.length > 0, "0-length-not-allowed");
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require(enterMarket.length == inputData.supplyTokens.length, "lengths-not-same");
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address _sourceAccount = getSubAccountAddress(userAccount, sourceId); //User's EOA sub-account address
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address _targetAccount = getSubAccountAddress(address(this), targetId);
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ImportData memory data;
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data = getBorrowAmounts(_sourceAccount, inputData, data);
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data = getSupplyAmounts(_targetAccount, inputData, data);
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_TransferEtokens(
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data._supplyTokens.length,
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data.eTokens,
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data.supplyAmts,
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data._supplyTokens,
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enterMarket,
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_sourceAccount,
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_targetAccount
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);
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_TransferDtokens(
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data._borrowTokens.length,
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data.dTokens,
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data.borrowAmts,
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data._borrowTokens,
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_sourceAccount,
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_targetAccount
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);
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}
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}
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