Source

ICO

how to deploy:

• choose an erc20 or deploy PICO

• deploy ico, set purchase token address -> pico

• deploy TICO, set address ico

• into ico set function targetIco(tico)

• into ico run function release

• mock erc20 (PICO) : block explorer - purchase token

• mock ico token (TICO) : block explorer - ico token

• ICO : block explorer

• dont forget to approve ico address from purchased pico

• you can change amount of tico in constructor for ico

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Review

• Start

function release() public onlyOwner {
    require(!isStart, "ico has been run");
    require(setup == true, "target ico not set yet");
    isStart = true;
    end = block.timestamp + duration;
}

• Claim

function claim(uint256 amount) public payable returns (bool _success, address _holder) {
    require(isStart, "when? after run before end!");
    require(block.timestamp < end, "finished, thanks for your support");
    require(tokenPurchase.balanceOf(msg.sender) >= amount * price);
    if(holder[msg.sender] + amount <= maxPurchase) {
        require(tokenPurchase.approve(admin, amount * price)); // run by ethersjs as alternative this line of code
        // same value of 2 tokens -> amount * price <- like a wrapped :)
        // we change here: amount * price --> function setValue(....
        require(tokenPurchase.transferFrom(msg.sender, admin, amount * price)); 
        require(counter < checker, "amazing! holder full");
        holder[msg.sender] += amount;
        _success = true;
        _holder = msg.sender;
        holders[counter] = msg.sender;
        counter++;
        tokenIco.transfer(msg.sender, amount * 10 ** decimal);
        // tokenIco.transferFrom(address(this), msg.sender, amount * 10 ** decimal);
        emit Claim(msg.sender, amount, block.timestamp);            
        } else {
        _success = false;
        _holder = address(0);
    }
    wd();
}