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added a modifier to restrict access #34

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added a modifier to restrict access #34

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11 changes: 7 additions & 4 deletions contracts/Conference.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,11 @@ contract Conference { // can be killed, so the owner gets sent the money in the
quota = 100;
numRegistrants = 0;
}

modifier restricted(){
require(msg.sender == organizer, "You are not authorized to perform this action");
_;
}

function buyTicket() public {
if (numRegistrants >= quota) {
Expand All @@ -23,13 +28,11 @@ contract Conference { // can be killed, so the owner gets sent the money in the
Deposit(msg.sender, msg.value);
}

function changeQuota(uint newquota) public {
if (msg.sender != organizer) { return; }
function changeQuota(uint newquota) public restricted {
quota = newquota;
}

function refundTicket(address recipient, uint amount) public {
if (msg.sender != organizer) { return; }
function refundTicket(address recipient, uint amount) public restricted {
if (registrantsPaid[recipient] == amount) {
address myAddress = this;
if (myAddress.balance >= amount) {
Expand Down