Blockchain By Example

Joining the game

In order to start the game, a player has to call the join() method while sending more than one ether to the Tontine contract. Therefore, in the Ctontine contract, we need to implement this function as follows:

function join() public payable returns(bool) {    require(Tplayer.exist(msg.sender), "player doesn't exist");    require(msg.value >= 1 ether && Tpension[msg.sender] == 0, "send higher pension");    Tpension[msg.sender] = msg.value;    Tplayer.EditPlayer(msg.sender, active_players.length);    active_players.push(Tplayer.getplayer(msg.sender));    Lindex += (active_players.length - 1);    ping_time[msg.sender] = now;    emit NewActivePlayerEv(msg.sender, now);    return true;}

Let’s go over this implementation, line by line.

First of all, the ...