From d57e8f6478778ae82280fe1ba1b74bbac71ffc6e Mon Sep 17 00:00:00 2001
From: Jacob Evans <jacob@dekz.net>
Date: Wed, 2 Feb 2022 09:43:09 +1000
Subject: [PATCH] Example Curve Sampler

---
 .../contracts/test/CurveSamplerTest.sol       | 54 +++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 packages/asset-swapper/contracts/test/CurveSamplerTest.sol

diff --git a/packages/asset-swapper/contracts/test/CurveSamplerTest.sol b/packages/asset-swapper/contracts/test/CurveSamplerTest.sol
new file mode 100644
index 0000000000..bccd5464c5
--- /dev/null
+++ b/packages/asset-swapper/contracts/test/CurveSamplerTest.sol
@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.6;
+pragma experimental ABIEncoderV2;
+
+import "./TestBase.sol";
+import "../src/ERC20BridgeSampler.sol";
+
+contract CurveSamplerTest is
+    TestBase 
+{
+    ERC20BridgeSampler sampler;
+
+    function setUp() public {
+        sampler = new ERC20BridgeSampler();
+        sampler.setSampleValues(_toSingleValueArray(1e18));
+    }
+
+    function testCurveSampler()
+        public
+        requiresChainId(1)
+        requiresBlockNumberGte(14000000)
+    {
+
+        uint256[] memory values = sampler.sampleSellsFromCurveGlobal(
+            CurveSampler.CurveInfo({
+                poolAddress: 0x06cb22615BA53E60D67Bf6C341a0fD5E718E1655,
+                sellQuoteFunctionSelector: 0x07211ef7,
+                buyQuoteFunctionSelector: 0x00000000
+            }),
+            0,
+            1
+        );
+
+        assertGt(values[0], 0);
+    }
+
+    function testCurveSamplerOptimism()
+        public
+        requiresChainId(10)
+    {
+
+        uint256[] memory values = sampler.sampleSellsFromCurveGlobal(
+            CurveSampler.CurveInfo({
+                poolAddress: 0x1337BedC9D22ecbe766dF105c9623922A27963EC,
+                sellQuoteFunctionSelector: 0x5e0d443f,
+                buyQuoteFunctionSelector: 0x00000000
+            }),
+            0,
+            1
+        );
+
+        assertGt(values[0], 0);
+    }
+}