Blockchain By Example

transfer() (required)

This is the other essential part of any minimal token implementation, and allows a balance to be transferred from one account to another:

function transfer(address _to, uint256 _value)    public    returns (bool success) {    require(balanceOf[msg.sender] >= _value);     balanceOf[msg.sender] -= _value;    balanceOf[_to] += _value;     emit Transfer(msg.sender, _to, _value);    return true; }

Let's break down what's happening:

• The contract requires that the user making the transfer has a sufficient number of tokens to do so.
• The balance of the sender is reduced and the balance of the receiver is increased.
• The transfer event described earlier must be emitted.
• The function returns true to show a successful transfer. If the transfer isn't ...