Blacksmith-DepositFunction.sol

  function deposit(address _lpToken, uint256 _amount) external override {
    require(block.timestamp >= START_TIME , "Blacksmith: not started");
    require(_amount > 0, "Blacksmith: amount is 0");
    Pool memory pool = pools[_lpToken];
    require(pool.lastUpdatedAt > 0, "Blacksmith: pool does not exists");
    require(IERC20(_lpToken).balanceOf(msg.sender) >= _amount, "Blacksmith: insufficient balance");
    updatePool(_lpToken);

    Miner storage miner = miners[_lpToken][msg.sender];
    BonusToken memory bonusToken = bonusTokens[_lpToken];
    _claimCoverRewards(pool, miner);
    _claimBonus(bonusToken, miner);

    miner.amount = miner.amount.add(_amount);
    // update writeoff to match current acc rewards/bonus per token
    miner.rewardWriteoff = miner.amount.mul(pool.accRewardsPerToken).div(CAL_MULTIPLIER);
    miner.bonusWriteoff = miner.amount.mul(bonusToken.accBonusPerToken).div(CAL_MULTIPLIER);

    IERC20(_lpToken).safeTransferFrom(msg.sender, address(this), _amount);
    emit Deposit(msg.sender, _lpToken, _amount);
  }