Bitcoin testnet4 · Spark REGTEST · no mainnet paths
Creative Bitcoin
🎮 Game Design & Interactive Media · interactive puzzles

Onchain Puzzle Locks

Design puzzles whose solutions must be proven onchain via Rootstock testnet smart contracts to unlock game content.

OP_RETURN provenance on testnet4· onchain timestamp
Section · Onchain

The primitive.

full primer →

Interactive puzzles gets a SHA-256 anchored into a Bitcoin testnet4 OP_RETURN — game designers see a 'timestamped on Bitcoin' chip and a permanent mempool.space link.

Why this primitiveAnchoring a SHA-256 fingerprint of this artefact in a Bitcoin testnet4 OP_RETURN gives it a wallet-independent, permanent, one-line proof-of-existence.

Kernel
a SHA-256 of any artifact anchored into a Bitcoin testnet4 OP_RETURN output — a one-line, immutable, wallet-independent proof-of-existence
Drives the UI as
a 'timestamped on Bitcoin' chip with block height + a mempool.space testnet4 tx link
Appendix · Secrets

Required keys.

PRIVY_APP_ID
Privy dashboard → your app. Configure with chainType 'spark' to mint Bitcoin L2 wallets on sign-in.
open ↗
PRIVY_APP_SECRET
Server-side. Required for the merchant Spark wallet to observe incoming sats transfers via the Privy RPC.
open ↗
PINATA_JWT
Pins images / JSON / manifests to IPFS.
open ↗

Add these in your Lovable project under Settings → Secrets before pasting the prompt below.

Appendix · Mega-prompt

The build prompt.

Paste into a fresh Lovable project — it carries its own feature spec, code, setup and checklist. read the build strategy →

loading the build spec…
Open in Lovable ↗mempool.space testnet4 ↗
Appendix · Market

Market sizing.

TAM
$700M
global puzzle game revenue including ARGs
SAM
$180M
blockchain-integrated puzzle experiences
SOM
$12M
indie puzzle creators exploring cryptographic challenges

Indicative figures for hackathon pitches — refine with your own research before raising.

See also

Adjacent entries.

quest tracking
Onchain Quest Ledger
Securely log player quest progress and achievements on Rootstock testnet to prove in-game milestones.
item distribution
Tokenized Loot Drops
Distribute rare, verifiable loot as tokens directly through Rootstock testnet smart contracts to guarantee authenticity.
community trust
Player Reputation Ledger
Create immutable player reputation scores recorded on Rootstock testnet to foster fair matchmaking and collaboration.
competitive scoring
Immutable Scoreboards
Store game scores on Rootstock testnet to prevent cheating and create permanent leaderboards.