Jack's Pot Smart Contract

Jack’s Pot is a no-loss lottery game built on Wanchain.

To play the game, users stake one or more tickets with a four digit number on each ticket.

Users may either choose a specific four digit number through “Self Selection”, or they may generate multiple tickets with randomly four chosen four digit numbers using “Machine Selection”.

In order to stake a ticket, users must supply 10 WAN for each ticket. This WAN will be locked up in a Wanchain validator node during the duration of the game, and users may withdraw this WAN when they are finished playing.

The WAN used by staking tickets is delegated to Wanchain’s validator nodes, and the accrued consensus rewards are pooled into the Jackpot.

Every Friday a winning four digit number is selected at random using Wanchain’s true random number generation, and the reward will be awarded to any users who are currently staking a winning number. If multiple users have tickets staked with the winning number, the Jackpot will be split proportionally amongst all tickets with the winning number.

The lottery closes at 00:00 UTC on Friday, lottery results are settled at 23:00 UTC on Friday, and the lottery re-opens at 00:00 UTC on Saturday.

If there is no winner, the prize pot will automatically accumulate to the next cycle.

If you do not withdraw your tickets, those tickets will automatically participate in the next cycle with your chosen numbers.

Deployment

Testnet

Proxy: 0xd8b67e4c66a4ab51fa8b7a30a82c63ff792b79c0

Delegate: 0x8dd7e6a2b5c1e10bab4924a1d5899a6023b9ab9e

Mainnet

Proxy: 0x76b074d91f546914c6765ef81cbdc6f9c7da5685

Delegate: 0x6558b7926a6c9882d5c1b83731f12fd132dfe767

Validators Selection

name	address	capacity	currentFee
WANBr	0x1f45cad3c17ced4d7596a5b40280a3f024b971f4	341381	0.9%
WAN.CN	0xd058aa0522de5f3cfac539cb8d270d6e570c717d	573079	1%
WanPie	0xe8ba6366e156c247aa1f39187e549c6cfee7ffeb	609686	0%
Zhejiang(浙江)	0x0288c83219701766197373d1149f616c62b52a7d	797328	5%
Bitrue	0x89d91c8a8a17b6c9ebeadcb6dcc1bac664335186	1799223	0%

Development

Code Compile

yarn
./node_modules/.bin/truffle compile

Run Code Test

You should first start a rpc server at http://localhost:7545

Then run:

yarn test

Run Code Coverage Analysis

yarn coverage

Then you can find a HTML-UI in coverage/index.html