[Easy] Deploy SolutionSubmitter contract (#1051)

This PR adds a migration script and deployment info for the SolutionSubmission wrapper contract. Since the GasToken only makes sense on mainnet

Verified on etherscan: https://etherscan.io/address/0xA1c956d7C3D8Ea7fd7E3757062e4aC563F07e68a#code

migrations/4_solution_submitter.js

@@ -0,0 +1,15 @@
+const BatchExchange = artifacts.require("BatchExchange.sol")
+const SolutionSubmitter = artifacts.require("SolutionSubmitter.sol")
+
+const GAS_TOKEN_ADDRESS = "0x0000000000004946c0e9F43F4Dee607b0eF1fA1c"
+const GAS_TOKEN_USAGE_THRESHOLD = 60000000000
+
+module.exports = async function (deployer, network) {
+  if (network === "mainnet") {
+    const exchange = await BatchExchange.deployed()
+    await deployer.deploy(SolutionSubmitter, exchange.address, GAS_TOKEN_ADDRESS, GAS_TOKEN_USAGE_THRESHOLD)
+  } else {
+    // eslint-disable-next-line no-console
+    console.log("Not deploying SolutionSubmitter on network: ", network)
+  }
+}

networks.json

@@ -58,5 +58,12 @@
       "address": "0xA18c8F9Ae6c18d177Aa369C64fa4a6956146e1A5",
       "transactionHash": "0xb77ad5c1a273826f8882be1919ec31c122d4710ac46ab2973d3b69138833c4b8"
     }
+  },
+  "SolutionSubmitter": {
+    "1": {
+      "links": {},
+      "address": "0xA1c956d7C3D8Ea7fd7E3757062e4aC563F07e68a",
+      "transactionHash": "0x071caa3075e6cc259b0c59e67e3a9439f7c295b518c609f1b8c55be00b44d6bb"
+    }
   }
 }