diff --git a/config/arb-config.js b/config/arb-config.js
index 5ab5275..201c395 100644
--- a/config/arb-config.js
+++ b/config/arb-config.js
@@ -10,6 +10,8 @@ module.exports = {
         DODOCalleeHelper: "0xe3B40F8D8346d428EAB28d9Fd672b784d921cfBD",
         DODOV1PmmHelper: "0x4EE6398898F7FC3e648b3f6bA458310ac29cD352",
         DODOV2RouteHelper: "0xd72b354BD39f8F11D0cA07bD5724896Bb1a42707",
+        CurveSample: "",
+
 
         //Template
         CloneFactory: "0x1ddD02f6d31C1eF04cFA0a1AA811406B5B2884E7",
@@ -44,6 +46,8 @@ module.exports = {
         DODOV1Adapter: "0xd5a7E197bacE1F3B26E2760321d6ce06Ad07281a",
         DODOV2Adapter: "0x8aB2D334cE64B50BE9Ab04184f7ccBa2A6bb6391",
         UniAdapter: "0x17eBC315760Bb47384224A5f3BF829222fbD3Aa7",
+        CurveAdapter: "",
+
 
         //Proxy
         DODOV2Proxy: "0xeCEaDe494FD5F913Fd937C5CAc4577236395Dc32",
diff --git a/config/bsc-config.js b/config/bsc-config.js
index ff06ab2..1b12464 100644
--- a/config/bsc-config.js
+++ b/config/bsc-config.js
@@ -10,6 +10,8 @@ module.exports = {
         DODOCalleeHelper: "0x2673E5333620bb22BD1bFB3af9Fc7012008E3b4B",
         DODOV1PmmHelper: "0x2BBD66fC4898242BDBD2583BBe1d76E8b8f71445",
         DODOV2RouteHelper: "0xC1CCE4C003B10052f168072A4c3c02051053d957",
+        CurveSample: "",
+
 
         //Template
         CloneFactory: "0x03E2427859119E497EB856a166F616a2Ce5f8c88",
@@ -48,6 +50,8 @@ module.exports = {
         DODOV1Adapter: "0x8E4842d0570c85Ba3805A9508Dce7C6A458359d0",
         DODOV2Adapter: "0x165BA87e882208100672b6C56f477eE42502c820",
         UniAdapter: "0xE223AcD7CBAFabCFfcAfeC5e69877424c4760aC2",
+        CurveAdapter: "",
+
 
         //Proxy
         DODOV2Proxy: "",
diff --git a/config/eth-config.js b/config/eth-config.js
index f83253f..6651c8e 100644
--- a/config/eth-config.js
+++ b/config/eth-config.js
@@ -10,6 +10,7 @@ module.exports = {
         DODOCalleeHelper: "0x45a7E2E9D780613E047f7e78a9d3902ff854B522",
         DODOV1PmmHelper: "0x6373ceB657C83C91088d328622573FB766064Ac4",
         DODOV2RouteHelper: "0x0672952Fab6BD1336C57AE09E49DB6D3e78B1896",
+        CurveSample: "0x5381382257C761DAc6F1509B1BA1B70dDaa6862a",
 
         //Template
         CloneFactory: "0x5e5a7b76462e4bdf83aa98795644281bdba80b88",
@@ -46,6 +47,7 @@ module.exports = {
         DODOV1Adapter: "0x91E1c84BA8786B1FaE2570202F0126C0b88F6Ec7",
         DODOV2Adapter: "0xe6AafA1c45D9d0C64686c1f1D17B9fe9c7DAB05b",
         UniAdapter: "0x50D148D0908C602A56884B8628A36470a875EEb2",
+        CurveAdapter: "0x12e599006a5F19819cde6FABceBbd8586688C8ac",
 
         //Proxy
         DODOV2Proxy: "",
diff --git a/config/heco-config.js b/config/heco-config.js
index b3996ee..6b89b35 100644
--- a/config/heco-config.js
+++ b/config/heco-config.js
@@ -10,6 +10,8 @@ module.exports = {
         DODOCalleeHelper: "0x684D9d0768761fF0659B9f55D98F57648302ed14",
         DODOV1PmmHelper: "0xFB973C79C665C0AC69E74C67be90D4C7A6f23c59",
         DODOV2RouteHelper: "0x67166F14E9aCf43A822BE147eA59CdDd01A7C00d",
+        CurveSample: "0xDfb423413f9Aa62Dd8e86a73d6e89918b4C22dd8",
+
 
         //Template
         CloneFactory: "0x5dCEAe50CF8C3B885430E0E79226C513Db0318f2",
@@ -45,6 +47,8 @@ module.exports = {
         DODOV1Adapter: "0x99d69565EdA438E3ebAA0627A407968ABD0f755b",
         DODOV2Adapter: "0x14F7B8Fb0c1447DdE7bcf92a8d9BB058c8A5FE64",
         UniAdapter: "0xa95cE97a04f61efb201c08da41e4bBF7E7106770",
+        CurveAdapter: "0x9Fc4588D38ebC0E73D8d2BCF2DA34Ae8E4bac61d",
+
 
         //Proxy
         DODOV2Proxy: "0xAc7cC7d2374492De2D1ce21e2FEcA26EB0d113e7",
diff --git a/config/matic-config.js b/config/matic-config.js
index 7e7287a..2ce516d 100644
--- a/config/matic-config.js
+++ b/config/matic-config.js
@@ -10,6 +10,8 @@ module.exports = {
         DODOCalleeHelper: "0x261F6cF4dF0e5c1432739cDAFD9299150FEd3dFc",
         DODOV1PmmHelper: "0x18DFdE99F578A0735410797e949E8D3e2AFCB9D2",
         DODOV2RouteHelper: "0x324c747885a88EA6f8115C46E0605C828ed527D3",
+        CurveSample: "",
+
 
         //Template
         CloneFactory: "0x729f7f44bf64Ce814716b6261e267DbE6cdf021c",
@@ -44,6 +46,8 @@ module.exports = {
         DODOV1Adapter: "0xDBFaF391C37339c903503495395Ad7D6B096E192",
         DODOV2Adapter: "0x6C30bE15d88462B788DEa7c6A860a2CCAF7B2670",
         UniAdapter: "0xe373DF144a70BCCc10190f97bEDE647D1eD6cfc8",
+        CurveAdapter: "",
+
 
         //Proxy
         DODOV2Proxy: "0x45894C062E6f4E58B257e0826675355305dfef0d",
diff --git a/config/ok-config.js b/config/ok-config.js
index ae6d3da..82c2581 100644
--- a/config/ok-config.js
+++ b/config/ok-config.js
@@ -10,6 +10,8 @@ module.exports = {
         DODOCalleeHelper: "0x3CD6D7F5fF977bf8069548eA1F9441b061162b42",
         DODOV1PmmHelper: "0xDfaf9584F5d229A9DBE5978523317820A8897C5A",
         DODOV2RouteHelper: "0x9B64c81ba54eA51e1f6B7fefb3cfF8AA6F1e2A09",
+        CurveSample: "",
+
 
         //Template
         CloneFactory: "0x2BBD66fC4898242BDBD2583BBe1d76E8b8f71445",
@@ -45,6 +47,8 @@ module.exports = {
         DODOV1Adapter: "0xbe9a66e49503e84ae59a4d0545365AABedf33b40",
         DODOV2Adapter: "0xa356867fDCEa8e71AEaF87805808803806231FdC",
         UniAdapter: "0xc6962a577A3Be5311f9f9Ab9B8b6A69a25bBc817",
+        CurveAdapter: "",
+
 
         //Proxy
         DODOV2Proxy: "0x6B4Fa0bc61Eddc928e0Df9c7f01e407BfcD3e5EF",
diff --git a/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol b/contracts/SmartRoute/adapter/CurveAdapter.sol
similarity index 65%
rename from contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol
rename to contracts/SmartRoute/adapter/CurveAdapter.sol
index e2afacd..39b3f97 100644
--- a/contracts/SmartRoute/adapter/CurveUnderlyingAdapter.sol
+++ b/contracts/SmartRoute/adapter/CurveAdapter.sol
@@ -1,8 +1,6 @@
 /*
-
-    Copyright 2020 DODO ZOO.
+    Copyright 2021 DODO ZOO.
     SPDX-License-Identifier: Apache-2.0
-
 */
 
 pragma solidity 0.6.9;
@@ -14,20 +12,24 @@ import {SafeMath} from "../../lib/SafeMath.sol";
 import {UniversalERC20} from "../lib/UniversalERC20.sol";
 import {SafeERC20} from "../../lib/SafeERC20.sol";
 
-// for two tokens
-contract CurveUnderlyingAdapter is IDODOAdapter {
+// for two tokens; to adapter like dodo V1
+contract CurveAdapter is IDODOAdapter {
     using SafeMath for uint;
+    using UniversalERC20 for IERC20;
 
     function _curveSwap(address to, address pool, bytes memory moreInfo) internal {
-        (address fromToken, address toToken, int128 i, int128 j) = abi.decode(moreInfo, (address, address, int128, int128));
-        require(fromToken == ICurve(pool).underlying_coins(i), 'CurveAdapter: WRONG_TOKEN');
-        require(toToken == ICurve(pool).underlying_coins(j), 'CurveAdapter: WRONG_TOKEN');
+        (bool noLending, address fromToken, address toToken, int128 i, int128 j) = abi.decode(moreInfo, (bool, address, address, int128, int128));
         uint256 sellAmount = IERC20(fromToken).balanceOf(address(this));
 
         // approve
-        IERC20(fromToken).approve(pool, sellAmount);
+        IERC20(fromToken).universalApproveMax(pool, sellAmount);
         // swap
-        ICurve(pool).exchange_underlying(i, j, sellAmount, 0);
+        if(noLending) {
+            ICurve(pool).exchange(i, j, sellAmount, 0);
+        } else {
+            ICurve(pool).exchange_underlying(i, j, sellAmount, 0);
+        }
+
         if(to != address(this)) {
             SafeERC20.safeTransfer(IERC20(toToken), to, IERC20(toToken).balanceOf(address(this)));
         }
diff --git a/contracts/SmartRoute/proxies/DODONFTProxy.sol b/contracts/SmartRoute/proxies/DODONFTProxy.sol
index d6e9011..9823057 100644
--- a/contracts/SmartRoute/proxies/DODONFTProxy.sol
+++ b/contracts/SmartRoute/proxies/DODONFTProxy.sol
@@ -163,7 +163,7 @@ contract DODONFTProxy is ReentrancyGuard, InitializableOwnable {
         _deposit(msg.sender, fragment, IFragment(fragment)._QUOTE_(), curRequireQuote, flag == 1);
         IFragment(fragment).buyout(msg.sender);
 
-        IDODONFTRegistry(_NFT_REGISTY_).removeRegistry(fragment);
+        // IDODONFTRegistry(_NFT_REGISTY_).removeRegistry(fragment);
 
         // refund dust eth
         if (flag == 1 && msg.value > curRequireQuote) msg.sender.transfer(msg.value - curRequireQuote);
diff --git a/contracts/SmartRoute/sampler/CurveSample.sol b/contracts/SmartRoute/sampler/CurveSample.sol
new file mode 100644
index 0000000..976a5d7
--- /dev/null
+++ b/contracts/SmartRoute/sampler/CurveSample.sol
@@ -0,0 +1,37 @@
+/*
+
+    Copyright 2021 DODO ZOO.
+    SPDX-License-Identifier: Apache-2.0
+
+*/
+
+pragma solidity 0.6.9;
+pragma experimental ABIEncoderV2;
+
+import "../intf/ICurve.sol";
+
+contract CurveSampler {
+   
+    function sampleFromCurve(
+        address curveAddress,
+        int128 fromTokenIdx,
+        int128 toTokenIdx,
+        uint256[] memory takerTokenAmounts
+    )
+        public
+        view
+        returns (uint256[] memory makerTokenAmounts)
+    {
+        uint256 numSamples = takerTokenAmounts.length;
+        makerTokenAmounts = new uint256[](numSamples);
+        for (uint256 i = 0; i < numSamples; i++) {
+            uint256 buyAmount = ICurve(curveAddress).get_dy_underlying(fromTokenIdx, toTokenIdx, takerTokenAmounts[i]);
+            makerTokenAmounts[i] = buyAmount;
+            // Break early if there are 0 amounts
+            if (makerTokenAmounts[i] == 0) {
+                break;
+            }
+        }
+        return makerTokenAmounts;
+    }
+}
\ No newline at end of file