added poll manager contract for storing the poll metadata

packages/hardhat/.gitignore

@@ -17,3 +17,4 @@ cache-zk
 deployments/localhost
 
 zkeys
+coordinatorKeyPair.json

packages/hardhat/contracts/PollManager.sol

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.10;
+
+import "@openzeppelin/contracts/access/Ownable.sol";
+import "./maci-contracts/MACI.sol";
+import { Params } from "./maci-contracts/utilities/Params.sol";
+import { DomainObjs } from "./maci-contracts/utilities/DomainObjs.sol";
+
+contract PollManager is Ownable, Params, DomainObjs {
+	struct PollContracts {
+		address poll;
+		address messageProcessor;
+		address tally;
+		address subsidy;
+	}
+
+	struct PollData {
+		string name;
+		bytes options;
+		string ipfsHash;
+		address creator;
+		PollContracts pollContracts;
+		uint256 endTime;
+		uint256 numOfOptions;
+	}
+
+	uint256 public fees;
+
+	mapping(uint256 => PollData) public polls;
+	uint256 public totalPolls;
+	uint256 public duration;
+
+	MACI public maci;
+
+	TreeDepths public treeDepths;
+	PubKey public coordinatorPubKey;
+	address public verifier;
+	address public vkRegistry;
+	bool public useSubsidy;
+
+	constructor(MACI _maci) {
+		fees = 0.01 ether;
+		maci = _maci;
+		duration = 600;
+	}
+
+	function setFees(uint256 _fees) public onlyOwner {
+		fees = _fees;
+	}
+
+	function setNewVotingTime(uint256 _duration) public onlyOwner {
+		duration = _duration;
+	}
+
+	function setConfig(
+		TreeDepths memory _treeDepths,
+		PubKey memory _coordinatorPubKey,
+		address _verifier,
+		address _vkRegistry,
+		bool _useSubsidy
+	) public onlyOwner {
+		treeDepths = _treeDepths;
+		coordinatorPubKey = _coordinatorPubKey;
+		verifier = _verifier;
+		vkRegistry = _vkRegistry;
+		useSubsidy = _useSubsidy;
+	}
+
+	function createPoll(
+		string calldata _name,
+		bytes calldata _options,
+		string calldata _ipfsHash,
+		uint256 numOfOptions
+	) public payable onlyOwner {
+		require(msg.value == fees, "incorrect fees sent");
+
+		MACI.PollContracts memory c = maci.deployPoll(
+			duration,
+			treeDepths,
+			coordinatorPubKey,
+			verifier,
+			vkRegistry,
+			useSubsidy
+		);
+
+		// create poll
+		polls[++totalPolls] = PollData({
+			name: _name,
+			options: _options,
+			ipfsHash: _ipfsHash,
+			creator: msg.sender,
+			endTime: block.timestamp + duration,
+			pollContracts: PollContracts({
+				poll: c.poll,
+				messageProcessor: c.messageProcessor,
+				tally: c.tally,
+				subsidy: c.subsidy
+			}),
+			numOfOptions: numOfOptions
+		});
+	}
+}