Tick

A mobile precision market on Solana for fast BTC, SOL and ETH tile predictions using devnet USDC, Anchor and MagicBlock Ephemeral Rollups.

Tick is a mobile precision market on Solana for fast BTC, SOL and ETH tile predictions using devnet USDC, Anchor and MagicBlock Ephemeral Rollups.

Users pick a crypto market, press Predict once to prepare a reusable fast prediction session, then tap a settlement tile during the prediction window. USDC staking and payout settlement stay on Solana devnet, while fast tile selection can run through MagicBlock ER when enabled.

Project Status

• Network: Solana devnet
• App: Expo React Native Android app
• Program framework: Anchor
• Fast execution layer: MagicBlock Ephemeral Rollups
• Token used for staking: devnet USDC-compatible SPL token with 6 decimals
• Android package: com.vijay.tick

Important Addresses

Name	Address
Tick Prediction Program	4gaZzuoNzEWUtRnLSFeHABQTn2hPxKy3V5qeVsUSYaJz
MagicBlock ER Validator	MAS1Dt9qreoRMQ14YQuhg8UTZMMzDdKhmkZMECCzk57
MagicBlock Delegation Program	DELeGGvXpWV2fqJUhqcF5ZSYMS4JTLjteaAMARRSaeSh
SPL Token Program	TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA

Program source:

• programs/tick_prediction/src/lib.rs

Client instruction builders:

• features/tick-prediction/tick-prediction-client.ts

IDL:

• constants/tick-prediction-idl.ts

Explorer

Devnet explorer link for the Tick Prediction program:

https://explorer.solana.com/address/4gaZzuoNzEWUtRnLSFeHABQTn2hPxKy3V5qeVsUSYaJz?cluster=devnet

How It Works

1. A supported market pool is initialized for BTC, SOL, or ETH.
2. Each round opens with a start price, duration, and prediction window.
3. The user presses Predict to authorize and fund a reusable session.
4. The user taps a tile during the prediction window.
5. The tile selection is written through the fast path when MagicBlock is enabled.
6. ER state is committed back to Solana before settlement and payout.
7. Winning predictions can claim USDC payout from the pool vault.

The v1 design keeps USDC custody and final settlement on Solana devnet. MagicBlock is used for fast round/prediction state, not for holding custody funds.

Markets

The app currently supports:

Symbol	Market
BTC	Bitcoin prediction round
SOL	Solana prediction round
ETH	Ethereum prediction round

Each prediction uses a 1 USDC stake:

1_000_000 base units, 6 decimals

Environment Variables

Create a .env file in the project root.

EXPO_PUBLIC_SOLANA_DEVNET_RPC_URL=https://api.devnet.solana.com
EXPO_PUBLIC_DEVNET_USDC_MINT=<your-devnet-usdc-mint>

EXPO_PUBLIC_MAGICBLOCK_ENABLED=true
EXPO_PUBLIC_MAGICBLOCK_ROUTER_RPC_URL=https://devnet-router.magicblock.app
EXPO_PUBLIC_MAGICBLOCK_ROUTER_WS_URL=wss://devnet-router.magicblock.app
EXPO_PUBLIC_MAGICBLOCK_ER_VALIDATOR=MAS1Dt9qreoRMQ14YQuhg8UTZMMzDdKhmkZMECCzk57
EXPO_PUBLIC_MAGICBLOCK_SESSION_TTL_SECONDS=900

EXPO_PUBLIC_DEVNET_HOUSE_WALLET_SECRET_KEY=<devnet-only-session-sponsor-key>

Important:

• Keep every RPC and router URL on devnet.
• Do not use a mainnet wallet key in this project.
• EXPO_PUBLIC_* values are bundled into the client. Treat the house wallet as devnet-only and disposable.

Local Development

Install dependencies:

bun install

Start Expo:

bun run dev

Run on a connected Android device:

bun run android --device

Check connected devices:

adb devices

APK Install

A local debug APK is generated at:

android/app/build/outputs/apk/debug/app-debug.apk

Install it on a connected Android phone:

adb install -r android/app/build/outputs/apk/debug/app-debug.apk

If Android says the package conflicts with an existing app, either uninstall the old app first or rebuild after changing expo.android.package in app.json.

EAS Build

Log in:

bunx eas-cli login

Build Android:

bunx eas-cli build -p android --profile preview

EAS project id:

f2c3bb64-30c3-4d14-a979-e2210ea02b07

Program Development

Run Anchor tests:

bun run anchor:test

Format:

bun run format

Typecheck:

bun run tsc --noEmit

Lint:

bun run lint:check

Main Program Instructions

The Anchor program includes instructions for:

• initialize_pool
• open_round
• authorize_pool_session
• open_round_with_session
• place_tile_prediction
• fund_prediction
• select_tile_on_er
• delegate_round
• delegate_prediction
• commit_round
• commit_prediction
• undelegate_round
• undelegate_prediction
• settle_round
• claim_payout

Repository Structure

app/                                  Expo Router screens
assets/                               App logo, market logos, fonts, sounds
constants/                            App config, styles, generated IDL
features/prices/                      Market price fetching and fallback feeds
features/tick-prediction/             Solana instruction builders and PDA helpers
programs/tick_prediction/             Anchor program
tests/                                Anchor test suite
vendor/ephemeral-rollups-sdk/         Vendored MagicBlock ER SDK

Notes

• The app is intentionally configured for devnet-only usage.
• Mainnet URLs are rejected by app config guards.