added Faucet for moonstream token

contracts/faucet/MoonstreamTokenFaucet.sol

@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.0;
+
+import {IERC20} from "@openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
+import "@openzeppelin-contracts/contracts/access/Ownable.sol";
+
+contract MoonstreamTokenFaucet is Ownable {
+    address MOONSTREAM_TOKEN_ADDRESS;
+    uint256 FAUCET_AMOUNT;
+    uint256 FAUCET_BLOCK_INTERVAL;
+    mapping(address => uint256) lastClaimedBlock;
+
+    constructor(
+        address _MOONSTREAM_TOKEN_ADDRESS,
+        address owner,
+        uint256 _FAUCET_AMOUNT,
+        uint256 _FAUCET_BLOCK_INTERVAL
+    ) {
+        MOONSTREAM_TOKEN_ADDRESS = _MOONSTREAM_TOKEN_ADDRESS;
+        FAUCET_AMOUNT = _FAUCET_AMOUNT;
+        FAUCET_BLOCK_INTERVAL = _FAUCET_BLOCK_INTERVAL;
+        transferOwnership(owner);
+    }
+
+    function getMoonstreamTokenAddress() public view returns (address) {
+        return MOONSTREAM_TOKEN_ADDRESS;
+    }
+
+    function getMoonstreamToken() internal view returns (IERC20) {
+        return IERC20(MOONSTREAM_TOKEN_ADDRESS);
+    }
+
+    function getMoonstreamTokenBalance(address _address)
+        public
+        view
+        returns (uint256)
+    {
+        return getMoonstreamToken().balanceOf(_address);
+    }
+
+    function getLastClaimedBlock(address _address)
+        public
+        view
+        returns (uint256)
+    {
+        return lastClaimedBlock[_address];
+    }
+
+    function claim() public {
+        uint256 current_block = block.number;
+        require(
+            current_block > lastClaimedBlock[msg.sender] + FAUCET_BLOCK_INTERVAL
+        );
+        getMoonstreamToken().transfer(msg.sender, FAUCET_AMOUNT);
+        lastClaimedBlock[msg.sender] = current_block;
+    }
+
+    function getFaucetAmount() public view returns (uint256) {
+        return FAUCET_AMOUNT;
+    }
+
+    function getFaucetBlockInterval() public view returns (uint256) {
+        return FAUCET_BLOCK_INTERVAL;
+    }
+
+    function setFaucetBlockInterval(uint256 _FAUCET_BLOCK_INTERVAL)
+        public
+        onlyOwner
+    {
+        FAUCET_BLOCK_INTERVAL = _FAUCET_BLOCK_INTERVAL;
+    }
+
+    function setFaucetAmount(uint256 _FAUCET_AMOUNT) public onlyOwner {
+        FAUCET_AMOUNT = _FAUCET_AMOUNT;
+    }
+
+    function setMoonstreamTokenAddress(address _MOONSTREAM_TOKEN_ADDRESS)
+        public
+        onlyOwner
+    {
+        MOONSTREAM_TOKEN_ADDRESS = _MOONSTREAM_TOKEN_ADDRESS;
+    }
+}