fix bugs (public verifier)

contracts/Mixer.sol

@@ -26,7 +26,7 @@ contract Mixer is MerkleTreeWithHistory {
   mapping(uint256 => bool) public nullifierHashes;
   // we store all commitments just to prevent accidental deposits with the same commitment
   mapping(uint256 => bool) public commitments;
-  IVerifier verifier;
+  IVerifier public verifier;
 
   event Deposit(uint256 indexed commitment, uint256 leafIndex, uint256 timestamp);
   event Withdraw(address to, uint256 nullifierHash, uint256 fee);

package.json

@@ -12,7 +12,7 @@
     "build:contract": "npx truffle compile",
     "test": "npx truffle test",
     "migrate": "npx truffle migrate --network kovan --reset",
-    "migrate:mainnet": "npx truffle migrate --network mainnet --reset",
+    "migrate:mainnet": "npx truffle migrate --network mainnet",
     "migrate:dev": "npx truffle migrate --network development --reset",
     "browserify": "npx browserify cli.js -o index.js --exclude worker_threads",
     "eslint": "npx eslint --ignore-path .gitignore .",

truffle-config.js

@@ -52,10 +52,10 @@ module.exports = {
       skipDryRun: true
     },
     mainnet: {
-      provider: () => new HDWalletProvider(process.env.PRIVATE_KEY, 'https://mainnet.infura.io/v3/c7463beadf2144e68646ff049917b716'),
+      provider: () => new HDWalletProvider(process.env.PRIVATE_KEY, 'http://ethereum-rpc.trustwalletapp.com'),
       network_id: 1,
-      gas: 5000000,
-      gasPrice: utils.toWei('3.1', 'gwei'),
+      gas: 6000000,
+      gasPrice: utils.toWei('2', 'gwei'),
       // confirmations: 0,
       // timeoutBlocks: 200,
       skipDryRun: true