Raffle is a rollup chain for Celestia. Anyone can create a Raffle and proceed fairly on the blockchain. Anyone can query the results easily.

curl https://get.ignite.com/cli | bash

• https://docs.ignite.com/

git clone https://github.com/daniel-ck89/raffle.git
cd raffle
git checkout v0.1.0
vi init.sh

> On line 49, update base_url to your celestia light node's gateway url.

./init.sh

• Simply run this script to start the chain.

• raffle tx raffle create-simple-raffle
• raffle tx raffle start-simple-raffle
• raffle q raffle raffles
• raffle q raffle raffle
• raffle q raffle raffle-result

raffled tx raffle create-simple-raffle "Event1" "This is a custom keyboard limited edition raffle." "https://docs.google.com/spreadsheets/d/1jEnEBlYIf_GfQs32WfaCJJNtrylpfQdL_2NVtegtPGM/edit?usp=sharing" 10 25 --from raffle-key-1 --broadcast-mode block --keyring-backend test --node http://localhost:27657

• If raffle creation is successful, Id (raffle_id) will be returned.

raffled tx raffle create-simple-raffle [title] [description] [participant-list-url] [number-of-winners] [number-of-participants] [flags]

• title : Raffle's title. ( max 256 characters )
• description : Raffle's description. ( max 1024 characters )
• participant-list-url : The url of the site contains the list of participants. Give each participant a unique id in sequential order, starting from 0. ex) https://docs.google.com/spreadsheets/d/1jEnEBlYIf_GfQs32WfaCJJNtrylpfQdL_2NVtegtPGM/edit#gid=0
• number-of-winners : This is the number of winners. ( max winners 10,000 )
• number-of-participants : The number of participants participating in the raffle. ( max participants 30,000 )

raffled q raffle raffle 0 --output json --node http://localhost:27657

• Response
  • {"raffle":{"creator":"raffle187p7dxsk3s4fujhx2q7a8ftd35fj2jmx97kfu0","id":"0","status":0,"title":"Event1","description":"This is a custom keyboard limited edition raffle.","participantListUrl":"https://docs.google.com/spreadsheets/d/1jEnEBlYIf_GfQs32WfaCJJNtrylpfQdL_2NVtegtPGM/edit?usp=sharing","numberOfWinners":10,"numberOfParticipants":25}}
• where status is the current status of raffle. 0 means raffle has not yet exited.

raffled q raffle raffle [raffle_id] [flags]

If the raffle_id is not returned due to broadcast timeout in the previous step, you can find your raffle by querying raffles.

raffled q raffle raffles --reverse --output=json --node http://localhost:27657

raffled tx raffle start-simple-raffle 0 --from raffle-key-1 --keyring-backend test --node http://localhost:27657

• Proceed to raffle.

raffled tx raffle start-simple-raffle [raffle_id] [flags]

raffled q raffle raffle-result 0 --output json --node http://localhost:27657

• Response
  • {"raffleResult":"{"result":[1,5,7,8,9,10,15,16,17,21]}"}
• This returns the participants_id(in the docs submitted through participant-list-url) of the winners.

raffled q raffle raffle-result [raffle_id] [flags]