Example Curve Sampler

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);
+    }
+}