MetaCoinFactory.sol

pragma solidity ^0.5.0;

contract MetaCoin {
	mapping (address => uint) balances;

	constructor(address metaCoinOwner, uint256 initialBalance) public {
		balances[metaCoinOwner] = initialBalance;
	}

	function sendCoin(address receiver, uint amount) public returns(bool sufficient) {
		if (balances[msg.sender] < amount) return false;
		balances[msg.sender] -= amount;
		balances[receiver] += amount;
		return true;
	}

	function getBalance(address addr) view public returns(uint) {
  	    return balances[addr];
	}
}

contract MetaCoinFactory {
    MetaCoin[] public metaCoinAddresses;
    event MetaCoinCreated(MetaCoin metaCoin);

    address private metaCoinOwner;

    constructor(address _metaCoinOwner ) public {
        metaCoinOwner = _metaCoinOwner ;
    }

    function createMetaCoin(uint256 initialBalance) external {
        MetaCoin metaCoin = new MetaCoin(metaCoinOwner, initialBalance);

        metaCoinAddresses.push(metaCoin);
        emit MetaCoinCreated(metaCoin);
    }

    function getMetaCoins() external view returns (MetaCoin[] memory) {
        return metaCoinAddresses;
    }
}