Remnants Autoplay | Solana NFT Game Bot

The Problem

Remnants is a Solana NFT idle game where you send characters on timed expeditions to earn tokens. Expeditions take anywhere from 10 minutes to 8 hours. Manually checking and redeploying NFTs constantly is tedious and guarantees you'll miss expedition completions.

Technical Approach

The bot handles the complete expedition lifecycle:

- Solana keypair loading from base58-encoded private keys

- Wallet authentication via Ed25519 message signing (challenge/response JWT flow)

- Multi-NFT state machine tracking expedition status and timers

- Discord webhook notifications for completed expeditions with loot summaries

- Automatic redeployment of NFTs immediately after completion

Interesting Challenges

Solana's Ed25519 signature scheme requires careful implementation. I built raw signature verification into the authentication flow rather than relying on high-level libraries.

What I'd Do Differently

The current implementation polls continuously. Webhook-based notifications from the game server would be more efficient, but the game doesn't support them. The bot is essentially a workaround for game design that assumes constant player attention.