StakeWeather

A Solana program where two players lock SOL and bet on whether a city's temperature will be above or below a threshold by a deadline. Temperature data is fetched from Open-Meteo via Switchboard On-Demand oracles.

Built to learn Switchboard custom oracle feeds on Solana devnet.

How it works

1. Creator creates a bet — picks a city, a temperature threshold, a direction (above/below), a deadline, and locks SOL
2. Challenger joins the bet — takes the opposite side and locks the same amount of SOL
3. Anyone calls update_feed after the deadline to fetch the latest temperature from Switchboard
4. Anyone calls settle_bet — the program reads the oracle account on-chain, determines the winner, and pays out the vault

Cities supported

• Mumbai (0)
• Delhi (1)
• Bangalore (2)

Setup

git clone https://github.com/mahelikaa/stake-weather.git
cd stake-weather
npm install
cd app
npm install
cp .env.example .env

Fill in .env:

RPC_URL=https://devnet.helius-rpc.com/?api-key=YOUR_HELIUS_API_KEY
CREATOR_KEYPAIR=/path/to/creator-keypair.json
CHALLENGER_KEYPAIR=/path/to/challenger-keypair.json

Tests

anchor build --ignore-keys
cargo test

--ignore-keys builds against the program ID in the source (Asn5...) instead of a locally generated keypair, so the compiled .so matches the deployed program and the tests.

Uses LiteSVM — runs the compiled Solana program in-process, no validator needed.

Running

cd app

# 1. Creator creates a bet
npx ts-node create_bet.ts

# 2. Challenger joins
npx ts-node join_bet.ts

# 3. Wait for the deadline, then update the feed
npx ts-node update_feed.ts

# 4. Wait a few seconds for the feed update to confirm, then settle
sleep 5 && npx ts-node settle_bet.ts

# Cancel a bet before anyone joins (creator only)
npx ts-node cancel_bet.ts

Program

Deployed on Solana devnet: Asn5AeENGV3LMtZKjf3sWectSeFKif2Ea5FZD3E8Lxc5

Tech

• Anchor 0.32.1
• Switchboard On-Demand 0.13.0
• Open-Meteo for weather data
• Helius RPC for devnet
• LiteSVM for testing