[TOOL] Giveaway Manager

[bitmover]

I created this simple tool to give more transparency and credibility to giveaways in bitcointalk.

I see there are lot of giveaways here, and this tool would fit perfectly many of them.

I would to present you the "Giveaway Manager"


https://bitcoindata.science/giveaway-manager/


Giveaways can now have their results easily verified.

It is also possible to save and share the results in a unique URL.


How it Works
Provably fair giveaway manager

As the blockhash is just a number, its last 6 digits is converted to decimal using this function:

Code: [Select]

var decimal = parseInt(blockhash.slice(-6), 16);
Now we have an integer (0 to 16777215) from the blockhash.

After dividing this decimal by the number of participants, we use the modulo operator (%) to get the division remainder becomes the index_number.

This index_number is applied in the participants list, to get the position of the winner.

Code: [Select]

var index_number = decimal % competitors.length;
var winner = competitors[index_number];
For additional winners, the past winners are removed from the list and one more digit is added from the blockhash. A maximum 30 was added to avoid working with big numbers.


If you find this useful  , please refer this tool in upcoming giveaways.

[yhiaali3]

Thank you bitmover

You were one of the distinguished members of the BitcoinTalk forum and provided many useful tools and high-quality posts there, and I see that you do the same thing in altcoinstalks forum.

Yes, I remember this tool well in BitcoinTalk forum. Giveaway Manager was really useful and was used by many, and I hope giveaways here will benefit from it as well.